Train power supply system and control method thereof

Abstract

The embodiment of the present specification provides a train power supply system and a control method thereof. The train power supply system comprises a catenary, a traction substation, at least two transition zones and a control device. Wherein, the at least two transition zones are connected in series on the catenary, and the traction substation has a voltage regulating function. When the train approaches the transition zone, the control device is used to control the traction substation to adjust the power supply voltage of the catenary on at least one side of the transition zone, so that the difference between the power supply voltages on both sides of the transition zone is less than a voltage threshold.

Description

Technical Field

[0001] This specification relates to the field of power supply, and in particular to a train power supply system and its control method. Background Technology

[0002] During railway train operation, the overhead contact system, as the main carrier of the traction power supply system, undertakes the function of power transmission. As a crucial component of the railway power supply network, the overhead contact system typically extends a long distance along the track and is powered by equipment such as traction substations. Due to the division of power supply sections and power dispatching requirements, there may be differences in electrical parameters such as voltage amplitude and phase between adjacent power supply sections on the overhead contact system. When a train passes through the transition area between adjacent power supply sections, the difference in supply voltage may cause voltage imbalance in the overhead contact system, thereby affecting the overall performance of the power supply network. In severe cases, this may lead to abnormal operation of electrical equipment, posing safety hazards.

[0003] Therefore, it is desirable to propose a train power supply system and its control method to improve the overall performance of the train power supply system and ensure the safety of railway operation. Summary of the Invention

[0004] This specification provides one or more embodiments of a control method for a train power supply system, applied to a train power supply system including an overhead contact line, a control device, and a traction substation. The method includes:

[0005] When the train approaches the transition zone on the overhead contact line, the control device controls the traction substation to adjust the power supply voltage of the overhead contact line on at least one side of the transition zone, so that the difference in power supply voltage on both sides of the transition zone is less than a voltage threshold.

[0006] In some embodiments, the transition zone includes a first transition zone and a second transition zone. The target power supply section connecting the traction substation on the contact network is connected to a first adjacent section on the contact network through the first transition zone, and the target power supply section is connected to a second adjacent section on the contact network through the second transition zone. The method further includes: when the train approaches the first transition zone from the first adjacent section, adjusting the target power supply voltage of the target power supply section through the control device, so that a first difference between the target power supply voltage of the target power supply section and the first power supply voltage of the first adjacent section is less than the voltage threshold; when the train approaches the second transition zone from the target power supply section, adjusting the target power supply voltage of the target power supply section through the control device, so that a second difference between the target power supply voltage of the target power supply section and the second power supply voltage of the second adjacent section is less than the voltage threshold.

[0007] In some embodiments, the first transition zone includes at least one first switch and at least one first position sensor, and the second transition zone includes at least one second switch and at least one second position sensor; wherein the position sensor is configured to detect the position information of the train; the method further includes: controlling the opening and closing of the first switch and / or the second switch based on the position information of the train, the power supply voltage information of the overhead contact line, and the switch state information of the first switch and / or the second switch, and controlling the traction substation to adjust the target power supply voltage of the target power supply section so that the first difference between the target power supply voltage of the target power supply section and the first power supply voltage of the first adjacent section is less than the voltage threshold, or so that the second difference between the target power supply voltage of the target power supply section and the second power supply voltage of the second adjacent section is less than the voltage threshold.

[0008] In some embodiments, the first transition region comprises a first electrical segment, a first switch, and two first position sensors, wherein the first switch is connected in parallel to both ends of the first electrical segment, and the two first position sensors are respectively disposed on the first side and the second side of the first electrical segment; the second transition region comprises a second electrical segment, a second switch, and two second position sensors, wherein the second switch is connected in parallel to both ends of the second electrical segment, and the two second position sensors are respectively disposed on the first side and the second side of the second electrical segment.

[0009] In some embodiments, the method further includes: in an initial state, controlling both the first switch in the first transition zone and the second switch in the second transition zone to be in an open state; when a first position sensor located on the first side of the first electrical substation detects the arrival of a train, controlling the traction substation to adjust the voltage through the control device, so that the first difference between the target power supply voltage of the target power supply section and the first power supply voltage of the first adjacent section is less than the voltage threshold; when a second position sensor located on the first side of the second electrical substation detects the arrival of a train, controlling the traction substation to adjust the voltage through the control device, so that the second difference between the target power supply voltage of the target power supply section and the second power supply voltage of the second adjacent section is less than the voltage threshold.

[0010] In some embodiments, the first transition region comprises a first electrical segment, a third electrical segment, two first switches, and three first position sensors. The two first switches are connected in parallel at both ends of the first electrical segment and the third electrical segment, respectively. The three first position sensors are respectively disposed on a first side of the first electrical segment, between the first electrical segment and the third electrical segment, and on a second side of the third electrical segment. The second transition region comprises a second electrical segment, a second switch, and two second position sensors. The second switch is connected in parallel at both ends of the second electrical segment, and the two second position sensors are respectively disposed on the first side and the second side of the second electrical segment.

[0011] In some embodiments, the method further includes: in an initial state, controlling the first switch in the first transition zone connected in parallel to the first electrical sub-section to be open, the first switch in the third electrical sub-section connected in parallel to be closed, and the second switch in the second transition zone to be open; when a first position sensor located on the first side of the first electrical sub-section and a second position sensor located on the first side of the second electrical sub-section detect that no train has arrived simultaneously, if a train arrives at the first position sensor located on the first side of the first electrical sub-section, controlling the voltage of the traction substation through the control device to adjust the voltage so that the first difference between the target power supply voltage of the target power supply section and the first power supply voltage of the first adjacent section is less than the voltage threshold; if a train arrives at the second position sensor located on the first side of the second electrical sub-section, controlling the voltage of the traction substation through the control device to adjust the voltage so that the second difference between the target power supply voltage of the target power supply section and the second power supply voltage of the second adjacent section is less than the voltage threshold.

[0012] In some embodiments, the method further includes: when a first position sensor located on a first side of the first electrical sub-section and a second position sensor located on a first side of the second electrical sub-section detect the simultaneous arrival of a train, the control device first controls the first switch in the first transition zone connected in parallel to the third electrical sub-section to open, and then controls the first switch in parallel to the first electrical sub-section to close; while controlling the first switch to open or close, the control device controls the voltage regulation of the traction substation to make the second difference less than the voltage threshold, thereby allowing the first train to pass through the first electrical sub-section and the second train to pass through the second transition zone; if the first train in the first transition zone reaches the first position sensor located between the first electrical sub-section and the third electrical sub-section, the control device controls the voltage regulation of the traction substation to make the first difference less than the voltage threshold, thereby allowing the first train to pass through the first transition zone; and after the first train passes through the first transition zone, the control device first controls the first switch in the first transition zone connected in parallel to the first electrical sub-section to open, and then controls the first switch in parallel to the third electrical sub-section to close.

[0013] In some embodiments, the first transition region comprises a first electrical segment, a first switch, and two first position sensors, wherein the first switch is connected in parallel to both ends of the first electrical segment, and the two first position sensors are respectively disposed on the first side and the second side of the first electrical segment; the second transition region comprises a second electrical segment, a fourth electrical segment, two second switches, and three second position sensors, wherein the two second switches are connected in parallel to both ends of the second electrical segment and the fourth electrical segment, and the three second position sensors are respectively disposed on the first side of the second electrical segment, between the second electrical segment and the fourth electrical segment, and on the second side of the fourth electrical segment.

[0014] In some embodiments, the method further includes: in an initial state, controlling the first switch of the first transition zone to open, the second switch of the second transition zone connected in parallel to the second electrical sub-section to open, and the second switch connected in parallel to the fourth electrical sub-section to close; when the first position sensor located on the first side of the first electrical sub-section and the second position sensor located on the first side of the second electrical sub-section detect that no train has arrived simultaneously, if a train arrives at the first position sensor located on the first side of the first electrical sub-section, controlling the voltage of the traction substation to adjust the voltage through the control device, so that the first difference between the target power supply voltage of the target power supply section and the first power supply voltage of the first adjacent section is less than the voltage threshold; if a train arrives at the second position sensor located on the first side of the second electrical sub-section, controlling the voltage of the traction substation to adjust the voltage through the control device, so that the second difference between the target power supply voltage of the target power supply section and the second power supply voltage of the second adjacent section is less than the voltage threshold.

[0015] In some embodiments, the method further includes: when the first position sensor located on the first side of the first electrical sub-section and the second position sensor located on the first side of the second electrical sub-section detect that a train arrives simultaneously, the control device first controls the second switch connected in parallel to the fourth electrical sub-section in the second transition zone to open, and then controls the second switch connected in parallel to the second electrical sub-section to close; while controlling the second switch to open or close, the control device controls the voltage adjustment of the traction substation to make the first difference between the target power supply voltage of the target power supply section and the first power supply voltage of the first adjacent section less than the voltage threshold, so that the first train located at the first position sensor on the first side of the first electrical sub-section in the first transition zone passes through the first electrical sub-section, from... The first train passes through the first transition zone, while the second train, located at the second position sensor on the first side of the second electrical sub-section, passes through the second electrical sub-section without power interruption. When the second train passes through the second electrical sub-section and reaches the second position sensor located between the second electrical sub-section and the fourth electrical sub-section, the control device controls the traction substation to adjust the voltage so that the second difference between the target power supply voltage of the target power supply section and the second power supply voltage of the second adjacent section is less than the voltage threshold, thereby allowing the second train to pass through the second transition zone. After the second train passes through the second transition zone, the control device first controls the second switch connected in parallel to the second electrical sub-section in the second transition zone to open, and then controls the second switch connected in parallel to the fourth electrical sub-section to close.

[0016] In some embodiments, the first transition region comprises a first electrical segment, a third electrical segment, two first switches, and three first position sensors. The two first switches are connected in parallel at both ends of the first electrical segment and the third electrical segment, respectively. The three first position sensors are respectively disposed on a first side of the first electrical segment, between the first electrical segment and the third electrical segment, and on a second side of the third electrical segment. The second transition region comprises a second electrical segment, a fourth electrical segment, two second switches, and three second position sensors. The two second switches are connected in parallel at both ends of the second electrical segment and the fourth electrical segment, respectively. The three second position sensors are respectively disposed on a first side of the second electrical segment, between the second electrical segment and the fourth electrical segment, and on a second side of the fourth electrical segment.

[0017] In some embodiments, the method further includes: in an initial state, controlling a first switch connected in parallel to the first electrical sub-section in the first transition zone to open and a first switch connected in parallel to the third electrical sub-section to close; controlling a second switch connected in parallel to the second electrical sub-section in the second transition zone to close and a second switch connected in parallel to the fourth electrical sub-section to open; when a first position sensor located on a first side of the first electrical sub-section and a second position sensor located between the second and fourth electrical sub-sections detect no trains arriving simultaneously, if a train arrives at the first position sensor located on the first side of the first electrical sub-section, controlling the traction substation to adjust the voltage through the control device, so that the target power supply section... If the first difference between the target power supply voltage and the first power supply voltage of the first adjacent section is less than the voltage threshold, the train will pass through the first transition zone. If the train moves from the second position sensor located on the first side of the second electrical sub-section to the second position sensor located between the second electrical sub-section and the fourth electrical sub-section, the control device will control the traction substation to adjust the voltage so that the second difference between the target power supply voltage of the target power supply section and the second power supply voltage of the second adjacent section is less than the voltage threshold, the train will pass through the fourth electrical sub-section to the second position sensor located on the second side of the fourth electrical sub-section, thus allowing the train to pass through the second transition zone.

[0018] In some embodiments, when the first position sensor located on the first side of the first electrical sub-section and the second position sensor located between the second and fourth electrical sub-sections detect the simultaneous arrival of a train, the control device first controls the first switch in the first transition zone connected in parallel to the third electrical sub-section to open, and then controls the first switch in parallel to the first electrical sub-section to close. Simultaneously with controlling the first switch, the control device controls the voltage adjustment of the traction substation so that the second difference between the target supply voltage of the target power supply section and the second supply voltage of the second adjacent section is less than the voltage threshold. At this time, the first train located at the first position sensor located on the first side of the first electrical sub-section passes through the first electrical sub-section of the first transition zone and reaches the first position sensor located between the first and third electrical sub-sections. Meanwhile, the second transition zone... The second train, located between the second and fourth electrical sub-sections, passes through the fourth electrical sub-section in the second transition zone to reach the second position sensor on the second side of the fourth electrical sub-section, thus allowing the second train to pass through the second transition zone. When the first position sensor located between the first and third electrical sub-sections detects the arrival of the first train, the control device controls the traction substation to adjust the voltage so that the first difference between the target power supply voltage of the target power supply section and the first power supply voltage of the first adjacent section is less than the voltage threshold. The first train then passes through the third electrical sub-section to reach the first position sensor located on the second side of the third electrical sub-section, thus allowing the first train to pass through the first transition zone. Furthermore, the control device first controls the first switch in the first transition zone connected in parallel to the first electrical sub-section to open, and then controls the first switch in the third electrical sub-section to close.

[0019] In some embodiments, the method further includes: in an initial state, controlling the first switch of the first transition zone connected in parallel to the first electrical sub-section to close and the first switch of the third electrical sub-section to open; controlling the second switch of the second transition zone connected in parallel to the second electrical sub-section to open and the second switch of the fourth electrical sub-section to close; when the first position sensor disposed between the first electrical sub-section and the third electrical sub-section, and the second position sensor disposed on the first side of the second electrical sub-section, detect that no train arrives simultaneously, since the first switch of the first transition zone connected in parallel to the first electrical sub-section is closed, the train passes through the first electrical sub-section and arrives at the first position sensor disposed between the first electrical sub-section and the third electrical sub-section. At this time, the train passes through the first electrical sub-section and arrives at the first position sensor disposed between the first electrical sub-section and the third electrical sub-section. The control device controls the voltage regulation of the traction substation to make the first difference less than the voltage threshold, thereby allowing the train to pass through the first transition zone. When the train reaches the second position sensor located on the first side of the second electrical sub-section, the control device controls the voltage regulation of the traction substation to make the second difference less than the voltage threshold, thereby allowing the train to pass through the second electrical sub-section and reach the second position sensor located between the second and fourth electrical sub-sections. Thereafter, due to the closure of the second switch connected in parallel to the fourth electrical sub-section, the train passes through the fourth electrical sub-section and reaches the second position sensor located on the second side of the fourth electrical sub-section, thereby allowing the train to pass through the second transition zone.

[0020] In some embodiments, the method further includes: when the first position sensor located between the first and third electrical sub-sections and the second position sensor located on the first side of the second electrical sub-section detect that a train arrives simultaneously, the control device first controls the second switch connected in parallel to the fourth electrical sub-section in the second transition zone to open, and then controls the second switch connected in parallel to the second electrical sub-section to close; while controlling the second switch, the control device controls the voltage adjustment of the traction substation to make the first difference less than the voltage threshold; at this time, the first train located at the first position sensor located between the first and third electrical sub-sections passes through the third electrical sub-section and reaches the first position sensor located on the second side of the third electrical sub-section, thereby allowing the first train to pass through the first transition zone; simultaneously... The second train, located at the second position sensor on the first side of the second electrical sub-section, passes through the second electrical sub-section of the second transition zone to reach the second position sensor located between the second electrical sub-section and the fourth electrical sub-section. When the second position sensor located between the second electrical sub-section and the fourth electrical sub-section detects the arrival of the second train, the control device controls the traction substation to adjust the voltage so that the second difference is less than the voltage threshold. The second train then passes through the fourth electrical sub-section to reach the second position sensor located on the second side of the fourth electrical sub-section, thereby allowing the second train to pass through the second transition zone. Further, the control device first controls the second switch connected in parallel to the second electrical sub-section of the second transition zone to open, and then controls the second switch connected in parallel to the fourth electrical sub-section to close.

[0021] In some embodiments, the overhead contact line includes a third adjacent section, a first transition zone, a first adjustable power supply section, a third electrical branch section, a second adjustable power supply section, a fourth electrical branch section, a third adjustable power supply section, a second transition zone, and a fourth adjacent section connected in sequence; the traction substation includes a first adjustable voltage output terminal, a second adjustable voltage output terminal, and a third adjustable voltage output terminal, which are respectively connected to the first adjustable power supply section, the second adjustable power supply section, and the third adjustable power supply section on the overhead contact line; the train power supply system further includes a second traction substation and a third traction substation; the third adjacent section is powered by the second traction substation; the fourth adjacent section is powered by the third traction substation; the method further includes: when the train approaches the first transition zone or the second transition zone, controlling the traction substation via the control device to adjust the power supply voltage of the first adjustable power supply section or the third adjustable power supply section, such that a third difference between the power supply voltages on both sides of the first transition zone is less than the voltage threshold or a fourth difference between the power supply voltages on both sides of the second transition zone is less than the voltage threshold.

[0022] In some embodiments, the method further includes: when the train moves from the first adjustable power supply section to the second adjustable power supply section, controlling the traction substation via the control device to adjust the power supply voltage of the second adjustable power supply section, such that a fifth difference between the power supply voltage of the second adjustable power supply section and the first adjustable power supply section is less than the voltage threshold; or when the train moves from the second adjustable power supply section to the third adjustable power supply section, controlling the traction substation via the control device to adjust the power supply voltage of the second adjustable power supply section, such that a sixth difference between the power supply voltage of the second adjustable power supply section and the third adjustable power supply section is less than the voltage threshold.

[0023] In some embodiments, the first transition zone includes a first electrical section and a first sectionalizing switch connected in parallel to both sides of the first electrical section; the second transition zone includes a second electrical section and a second sectionalizing switch connected in parallel to both sides of the second electrical section; the traction substation includes a first voltage regulating converter, a second voltage regulating converter, and a third voltage regulating converter; the first voltage regulating converter is connected to a first adjustable power supply section via a first control switch; the second voltage regulating converter is connected to a second adjustable power supply section via a second control switch; and the third voltage regulating converter is connected to a third adjustable power supply section via a third control switch; the method further includes: controlling the closing of the first sectionalizing switch via the control device in response to a third difference between the supply voltages on both sides of the first transition zone being less than the voltage threshold; and controlling the closing of the second sectionalizing switch via the control device in response to a fourth difference between the supply voltages on both sides of the second transition zone being less than the voltage threshold.

[0024] In some embodiments, in an initial state, the first control switch and the third control switch are controlled to be closed; controlling the closing of the first segment switch through the control device includes: controlling the first voltage regulating converter to operate, so as to adjust the voltage of the first adjustable power supply segment to be consistent with the voltage of the third adjacent segment, and controlling the first segment switch to close; controlling the closing of the second segment switch through the control device includes: controlling the third voltage regulating converter to operate, so as to adjust the voltage of the third adjustable power supply segment to be consistent with the voltage of the fourth adjacent segment, and controlling the second segment switch to close.

[0025] In some embodiments, the method further includes: when a train approaches the first side of the overhead contact line and the train passes through the first transition zone and approaches the second adjustable power supply section from the first adjustable power supply section, controlling the second control switch to a closed state via the control device, and controlling the second voltage regulating converter to operate, so as to adjust the voltage of the second adjustable power supply section and the first adjustable power supply section to be consistent; when the train approaches the third adjustable power supply section from the second adjustable power supply section, controlling the second control switch to a closed state via the control device, and controlling the second voltage regulating converter to operate, so as to adjust the voltage of the second adjustable power supply section and the third adjustable power supply section to be consistent.

[0026] In some embodiments, the overhead contact system includes an upstream overhead contact system and a downstream overhead contact system, which are connected by parallel switches. Trains on the upstream and downstream overhead contact systems run in opposite directions. Both the upstream and downstream overhead contact systems include a third adjacent section, a first transition zone, a first adjustable power supply section, a third electrical sub-section, a second adjustable power supply section, a fourth electrical sub-section, a third adjustable power supply section, a second transition zone, and a fourth adjacent section, connected in sequence. The first transition zone includes a first electrical sub-section and a first sectionalizing switch connected in parallel on both sides of the first electrical sub-section. The second transition zone includes a second electrical sub-section and a second sectionalizing switch connected in parallel on both sides of the second electrical sub-section. The method further includes: when the upstream and downstream overhead contact systems simultaneously receive and dispatch trains, the control device controls the traction substation to adjust the voltage of the second adjustable power supply section, so that the voltage of the second adjustable power supply section is consistent with the voltage of the first adjustable power supply section or the third adjustable power supply section, so that the train passes through the electrical sub-sections at both ends of the second adjustable power supply section.

[0027] In some embodiments, the traction substation includes a fourth voltage regulating converter, a fifth voltage regulating converter, a sixth voltage regulating converter, and a seventh voltage regulating converter; the third electrical distribution section includes a downlink third electrical distribution section and an uplink third electrical distribution section, and the fourth electrical distribution section includes a downlink fourth electrical distribution section and an uplink fourth electrical distribution section; the fourth voltage regulating converter is connected to the uplink first adjustable power supply section and the downlink first adjustable power supply section respectively via an uplink first control switch; the fifth voltage regulating converter is connected to the downlink second adjustable power supply section via a downlink second control switch; the sixth voltage regulating converter is connected to the uplink second adjustable power supply section via an uplink second control switch; and the seventh voltage regulating converter is connected to the uplink third adjustable power supply section and the downlink third adjustable power supply section respectively via an uplink third control switch.

[0028] In some embodiments, the method further includes: for the upstream overhead contact line, in an initial state, controlling the seventh voltage regulating converter to operate via the control device to maintain the voltage of the upstream third adjustable power supply section consistent with that of the upstream fourth adjacent section, and closing the upstream second segment switch; and controlling the fourth voltage regulating converter to operate via the control device to maintain the voltage of the upstream first adjustable power supply section consistent with that of the upstream third adjacent section, and closing the upstream first segment switch; when the train approaches the upstream second adjustable power supply section from the upstream third adjustable power supply section, controlling the sixth voltage regulating converter to operate via the control device to maintain the voltage of the upstream second adjustable power supply section consistent with that of the upstream third adjustable power supply section; when the train approaches the upstream first adjustable power supply section from the upstream second adjustable power supply section, controlling the sixth voltage regulating converter to operate via the control device to maintain the voltage of the upstream second adjustable power supply section consistent with that of the upstream first adjustable power supply section.

[0029] In some embodiments, the method further includes: for the downlink overhead contact line, in an initial state, controlling the fourth voltage regulating converter to operate via the control device to maintain the voltage of the downlink first adjustable power supply section and the downlink third adjacent section at the same level, and closing the downlink first sectionalizing switch; and controlling the seventh voltage regulating converter to operate via the control device to maintain the voltage of the downlink third adjustable power supply section and the downlink fourth adjacent section at the same level, and closing the downlink second sectionalizing switch; when the train moves from the downlink first adjustable power supply section to the downlink second adjustable power supply section, controlling the fifth voltage regulating converter to operate via the control device to maintain the voltage of the downlink second adjustable power supply section and the downlink first adjustable power supply section at the same level; when the train moves from the downlink second adjustable power supply section to the downlink third adjustable power supply section, controlling the fifth voltage regulating converter to operate via the control device to maintain the voltage of the downlink second adjustable power supply section and the downlink third adjustable power supply section at the same level.

[0030] In some embodiments, the transition zone includes a first transition zone, a second transition zone, and a third transition zone; the contact network is electrically segmented into a first power supply section, a second power supply section, a third power supply section, and a fourth power supply section; wherein, a first side of the first transition zone is connected to the first power supply section, and a second side is connected to the second power supply section; a first side of the second transition zone is connected to the second power supply section, and a second side is connected to the third power supply section; a first side of the third transition zone is connected to the third power supply section, and a second side is connected to the fourth power supply section; the method further includes: when a train approaches the first transition zone, controlling the traction substation to adjust the power supply voltage of the second power supply section via the control device, such that the voltage difference between the two sides of the first transition zone is less than the voltage threshold; when a train approaches the second transition zone, controlling the traction substation to adjust the power supply voltage of the second power supply section and the third power supply section via the control device, such that the voltage difference between the two sides of the second transition zone is less than the voltage threshold; when a train approaches the third transition zone, controlling the traction substation to adjust the power supply voltage of the third power supply section via the control device, such that the voltage difference between the two sides of the third transition zone is less than the voltage threshold.

[0031] In some embodiments, the traction substation includes a first adjustable voltage output port and a second adjustable voltage output port, the first adjustable voltage output port being connected to the second power supply section and the second adjustable voltage output port being connected to the third power supply section; the method further includes: adjusting the power supply voltage of the second power supply section based on the first adjustable voltage output port; and adjusting the power supply voltage of the third power supply section based on the second adjustable voltage output port.

[0032] In some embodiments, the first transition zone includes at least one first position sensor, the second transition zone includes at least one second position sensor, and the third transition zone includes at least one third position sensor; wherein the position sensor is configured to detect the position information of the train; the method further includes: controlling the traction substation to adjust the power supply voltage of the contact network on both sides of the first transition zone, the second transition zone, or the third transition zone, based on the position information of the train and the power supply voltage information of the contact network, such that the difference in power supply voltage on both sides of the first transition zone, the second transition zone, or the third transition zone is less than the voltage threshold.

[0033] In some embodiments, the first transition region includes a first electrical segment and a first position sensor, the first position sensor being disposed on a first side of the first electrical segment; the second transition region includes a second electrical segment and a second position sensor, the second position sensor being disposed on the first side of the second electrical segment; the third transition region includes a third electrical segment and a third position sensor, the third position sensor being disposed on a first side of the third electrical segment.

[0034] In some embodiments, the method further includes: when a train passes through the first transition zone, the second transition zone, and the third transition zone in sequence, if the first position sensor detects the arrival of a train, the control device controls the traction substation to adjust the voltage of the first adjustable voltage output port so that the difference in supply voltage between the two sides of the first electrical section of the first transition zone is less than the voltage threshold; if the second position sensor detects the arrival of a train, the control device controls the traction substation to adjust the voltage of the first adjustable voltage output port and the second adjustable voltage output port so that the difference in supply voltage between the two sides of the second electrical section of the second transition zone is less than the voltage threshold; if the third position sensor detects the arrival of a train, the control device controls the traction substation to adjust the voltage of the second adjustable voltage output port so that the difference in supply voltage between the two sides of the third electrical section of the third transition zone is less than the voltage threshold.

[0035] In some embodiments, the method further includes: when two trains simultaneously pass through any two of the first, second, and third transition zones, if the first position sensor detects the arrival of a train and the second position sensor detects the arrival of a train, the control device controls the traction substation to adjust the voltage of the first adjustable voltage output port and the second adjustable voltage output port, so that the voltage difference between the supply voltages on both sides of the first electrical section of the first transition zone is less than a voltage threshold, and the voltage difference between the supply voltages on both sides of the second electrical section of the second transition zone is less than the voltage threshold; if the first position sensor detects the arrival of a train and the third position sensor detects the arrival of a train, the control device... The control device adjusts the voltages of the first and second adjustable voltage output ports of the traction substation to make the voltage difference between the two sides of the first electrical section of the first transition zone less than a voltage threshold, and the voltage difference between the two sides of the third electrical section of the third transition zone less than the voltage threshold. If the second position sensor detects the arrival of a train and the third position sensor detects the arrival of a train, the control device controls the traction substation to adjust the voltages of the first and second adjustable voltage output ports to make the voltage difference between the two sides of the second electrical section of the second transition zone less than the voltage threshold, and the voltage difference between the two sides of the third electrical section of the third transition zone less than the voltage threshold.

[0036] In some embodiments, the first transition region includes a first electrical segment and a first position sensor, the first position sensor being disposed on a first side of the first electrical segment; the second transition region includes two second switches, a second electrical segment, a fourth electrical segment, and three second position sensors, the two second switches being connected in parallel at both ends of the second electrical segment and the fourth electrical segment, and the three second position sensors being disposed on a first side of the second electrical segment, between the second electrical segment and the fourth electrical segment, and on a second side of the fourth electrical segment; the third transition region includes a third electrical segment and a third position sensor, the third position sensor being disposed on a first side of the third electrical segment.

[0037] In some embodiments, the method further includes controlling the opening and closing of the second switch via the control device.

[0038] In some embodiments, the method further includes: when three trains simultaneously arrive at the first transition zone, the second transition zone, and the third transition zone respectively, the initial state of the second switch connected in parallel to the second electrical sub-section is open, and the initial state of the second switch connected in parallel to the fourth electrical sub-section is closed; the control device controls the traction substation to adjust the voltage of the first adjustable output port so that the voltage difference between the supply voltages on both sides of the first electrical sub-section in the first transition zone is always less than a voltage threshold; in response to the first position sensor of the first train arriving at the first transition zone, the second position sensor of the second train arriving at the second transition zone located on the first side of the second electrical sub-section, and the third position sensor of the third train arriving at the third transition zone, the control device controls the traction substation to adjust... The voltage of the second adjustable output port is adjusted so that the difference in supply voltage between the two sides of the third electrical section of the third transition zone is less than the voltage threshold. Then, the second switch connected in parallel to the second electrical section is controlled to be closed and the second switch connected in parallel to the fourth electrical section is controlled to be open. In response to the first train passing through the first transition zone, the second train reaching the second position sensor located between the second and fourth electrical sections in the second transition zone, and the third train passing through the third transition zone, the control device controls the traction substation to adjust the voltage of the second adjustable output port so that the difference in supply voltage between the second side of the fourth electrical section of the second transition zone and the first side of the first electrical section of the first transition zone is less than the voltage threshold, thereby allowing the second train to pass through the second transition zone.

[0039] In some embodiments, the method further includes: when three trains simultaneously arrive at the first transition zone, the second transition zone, and the third transition zone respectively, the second switch connected in parallel to the second electrical sub-section is closed, and the second switch connected in parallel to the fourth electrical sub-section is open; the control device controls the traction substation to adjust the voltage of the second adjustable output port so that the difference in supply voltage across the third electrical sub-section of the third transition zone is always less than the voltage threshold; in response to the first position sensor of the first train arriving at the first transition zone, the second train arriving at the second position sensor of the second transition zone located between the second and fourth electrical sub-sections, and the third train arriving at the third position sensor of the third transition zone... The sensor is placed, and the control device controls the traction substation to adjust the voltage of the first adjustable voltage output port so that the voltage difference between the first side of the second electrical section of the second transition zone and the second side of the third electrical section of the third transition zone is less than the voltage threshold. Then, the second switch connected in parallel to the fourth electrical section is controlled to be closed and the second switch connected in parallel to the second electrical section is controlled to be open. Then, the control device controls the traction substation to adjust the voltage of the first adjustable voltage output port so that the voltage difference between the two sides of the first electrical section of the first transition zone is less than the voltage threshold, so that the first train, the second train and the third train simultaneously pass through the first transition zone, the second transition zone and the third transition zone respectively.

[0040] In some embodiments, the method further includes: when three trains simultaneously pass through the first transition zone, the second transition zone, and the third transition zone respectively, the initial state of the second switch connected in parallel to the second electrical sub-section is open, and the initial state of the second switch connected in parallel to the fourth electrical sub-section is open; the control device controls the traction substation to adjust the voltage of the first adjustable voltage output port and the second adjustable voltage output port, so that the difference in supply voltage on both sides of the first electrical sub-section of the first transition zone is always less than the voltage threshold, and the difference in supply voltage on both sides of the third electrical sub-section of the third transition zone is always less than the voltage threshold, thereby allowing the first train and the third train to pass through the first transition zone and the third transition zone respectively; in response to the train reaching the second position sensor located on the first side of the second electrical sub-section in the second transition zone, the control device controls the second switch connected in parallel to the second electrical sub-section to close; in response to the train reaching the second position sensor located between the second electrical sub-section and the fourth electrical sub-section in the second transition zone, the control device controls the second switch connected in parallel to the second electrical sub-section to open and the second switch connected in parallel to the fourth electrical sub-section to close, thereby allowing the second train to pass through the second transition zone.

[0041] In some embodiments, the target power supply section of the overhead contact line connecting the traction substation and the adjacent power supply section on the overhead contact line are connected through the transition zone, wherein the adjacent power supply section is the power supply section corresponding to the traction substation adjacent to the traction substation; the transition zone includes a switch and an electrical distribution section; the method further includes: when the train approaches the transition zone from the adjacent power supply section on the overhead contact line, the control device controls the traction substation to adjust the power supply voltage of the overhead contact line on at least one side of the transition zone, so that the difference in power supply voltage on both sides of the transition zone is less than the voltage threshold; when the difference in power supply voltage on both sides of the transition zone is less than the voltage threshold, the control device controls the switch of the transition zone to close and maintain; and the control device controls the traction substation to adjust the output voltage, so that the output voltage of the traction substation is equal to the output voltage of the adjacent traction substation.

[0042] In some embodiments, the adjacent traction substation includes a first voltage transformer configured to detect a fourth supply voltage of the adjacent traction substation; the method further includes: controlling the traction substation to adjust a fifth supply voltage via the control device so that the fifth supply voltage is equal to the fourth supply voltage of the adjacent traction substation; and controlling the closing of the switch in the transition zone.

[0043] In some embodiments, after the switch in the transition zone is closed, the traction substation and the adjacent traction substation jointly supply power to the contact network between them.

[0044] This specification provides one or more embodiments of a train power supply system, including: an overhead contact line, a traction substation, at least two transition zones, and a control device; the at least two transition zones are connected in series on the overhead contact line, and the traction substation has a voltage regulation function; when the train approaches the transition zone, the control device is used to control the traction substation to adjust the power supply voltage of the overhead contact line on at least one side of the transition zone, so that the difference in power supply voltage on both sides of the transition zone is less than a voltage threshold.

[0045] In some embodiments, the at least two transition zones include a first transition zone and a second transition zone. The target power supply section of the contact network connecting the traction substation is connected to a first adjacent section of the contact network through the first transition zone, and the target power supply section is connected to a second adjacent section of the contact network through the second transition zone. The traction substation is configured, under the control of the control device, to adjust the target power supply voltage of the target power supply section so that a first difference between the target power supply voltage of the target power supply section and the first power supply voltage of the first adjacent section is less than a voltage threshold when the train approaches the first transition zone from the first adjacent section; and to adjust the target power supply voltage of the target power supply section so that a second difference between the target power supply voltage of the target power supply section and the second power supply voltage of the second adjacent section is less than the voltage threshold when the train approaches the second transition zone from the target power supply section.

[0046] In some embodiments, the first transition zone includes at least one first switch and at least one first position sensor, and the second transition zone includes at least one second switch and at least one second position sensor; wherein the position sensor is configured to detect the position information of the train; the control device is further configured to control the traction substation to adjust the power supply voltage based on the position information of the train and the power supply voltage information of the overhead contact line, and to control the opening and closing of the first switch and / or the second switch.

[0047] In some embodiments, the first transition region comprises a first electrical segment, a first switch, and two first position sensors, wherein the first switch is connected in parallel to both ends of the first electrical segment, and the two first position sensors are respectively disposed on the first side and the second side of the first electrical segment; the second transition region comprises a second electrical segment, a second switch, and two second position sensors, wherein the second switch is connected in parallel to both ends of the second electrical segment, and the two second position sensors are respectively disposed on the first side and the second side of the second electrical segment.

[0048] In some embodiments, the first transition region comprises a first electrical segment, a third electrical segment, two first switches, and three first position sensors. The two first switches are connected in parallel at both ends of the first electrical segment and the third electrical segment, respectively. The three first position sensors are respectively disposed on a first side of the first electrical segment, between the first electrical segment and the third electrical segment, and on a second side of the third electrical segment. The second transition region comprises a second electrical segment, a second switch, and two second position sensors. The second switch is connected in parallel at both ends of the second electrical segment, and the two second position sensors are respectively disposed on the first side and the second side of the second electrical segment.

[0049] In some embodiments, the first transition region comprises a first electrical segment, a first switch, and two first position sensors, wherein the first switch is connected in parallel to both ends of the first electrical segment, and the two first position sensors are respectively disposed on the first side and the second side of the first electrical segment; the second transition region comprises a second electrical segment, a fourth electrical segment, two second switches, and three second position sensors, wherein the two second switches are connected in parallel to both ends of the second electrical segment and the fourth electrical segment, and the three second position sensors are respectively disposed on the first side of the second electrical segment, between the second electrical segment and the fourth electrical segment, and on the second side of the fourth electrical segment.

[0050] In some embodiments, the first transition region comprises a first electrical segment, a third electrical segment, two first switches, and three first position sensors. The two first switches are connected in parallel at both ends of the first electrical segment and the third electrical segment, respectively. The three first position sensors are respectively disposed on a first side of the first electrical segment, between the first electrical segment and the third electrical segment, and on a second side of the third electrical segment. The second transition region comprises a second electrical segment, a fourth electrical segment, two second switches, and three second position sensors. The two second switches are connected in parallel at both ends of the second electrical segment and the fourth electrical segment, respectively. The three second position sensors are respectively disposed on a first side of the second electrical segment, between the second electrical segment and the fourth electrical segment, and on a second side of the fourth electrical segment.

[0051] In some embodiments, the transition zone includes a first transition zone, a second transition zone, and a third transition zone; the contact network is electrically segmented into a first power supply section, a second power supply section, a third power supply section, and a fourth power supply section; wherein, a first side of the first transition zone is connected to the first power supply section, and a second side is connected to the second power supply section; a first side of the second transition zone is connected to the second power supply section, and a second side is connected to the third power supply section; a first side of the third transition zone is connected to the third power supply section, and a second side is connected to the fourth power supply section; the traction substation is configured, under the control of the control device, to adjust the power supply voltage of the second power supply section when the train approaches the first transition zone, such that the difference between the first power supply voltages on both sides of the first transition zone is less than the voltage threshold; to adjust the power supply voltages of the second power supply section and the third power supply section when the train approaches the second transition zone, such that the difference between the second power supply voltages on both sides of the second transition zone is less than the voltage threshold; and to adjust the power supply voltage of the third power supply section when the train approaches the third transition zone, such that the difference between the third power supply voltages on both sides of the third transition zone is less than the voltage threshold.

[0052] In some embodiments, the traction substation includes a first adjustable voltage output port and a second adjustable voltage output port; wherein the first adjustable voltage output port is connected to the second power supply section and configured to adjust the power supply voltage of the second power supply section, and the second adjustable voltage output port is connected to the third power supply section and configured to adjust the power supply voltage of the third power supply section.

[0053] In some embodiments, the first transition zone includes at least one first position sensor, the second transition zone includes at least one second position sensor, and the third transition zone includes at least one third position sensor; wherein the position sensors are configured to detect the position information of the train; and the control device is configured to control the traction substation to adjust the power supply voltage of the contact network on both sides of the first transition zone, the second transition zone, or the third transition zone based on the position information of the train and the power supply voltage information of the contact network, such that the difference in power supply voltage on both sides of the first transition zone, the second transition zone, or the third transition zone is less than the voltage threshold.

[0054] In some embodiments, the first transition region includes a first electrical segment and a first position sensor, the first position sensor being disposed on a first side of the first electrical segment; the second transition region includes a second electrical segment and a second position sensor, the second position sensor being disposed on the first side of the second electrical segment; the third transition region includes a third electrical segment and a third position sensor, the third position sensor being disposed on a first side of the third electrical segment.

[0055] In some embodiments, the first transition region includes a first electrical segment and a first position sensor, the first position sensor being disposed on a first side of the first electrical segment; the second transition region includes two second switches, a second electrical segment, a fourth electrical segment, and three second position sensors, the two second switches being connected in parallel at both ends of the second electrical segment and the fourth electrical segment, and the three second position sensors being disposed on a first side of the second electrical segment, between the second electrical segment and the fourth electrical segment, and on a second side of the fourth electrical segment; the third transition region includes a third electrical segment and a third position sensor, the third position sensors being disposed on a first side of the third electrical segment.

[0056] In some embodiments, the control device is further configured to control the opening and closing of the second switch.

[0057] In some embodiments, the overhead contact line includes a third adjacent section, a first transition zone, a first adjustable power supply section, a third electrical distribution section, a second adjustable power supply section, a fourth electrical distribution section, a third adjustable power supply section, a second transition zone, and a fourth adjacent section connected in sequence; the traction substation includes a first adjustable voltage output terminal, a second adjustable voltage output terminal, and a third adjustable voltage output terminal, which are respectively connected to the first adjustable power supply section, the second adjustable power supply section, and the third adjustable power supply section on the overhead contact line; the train power supply system further includes a second traction substation and a third traction substation; the third adjacent section is powered by the second traction substation; and the fourth adjacent section is powered by the third traction substation.

[0058] In some embodiments, the first transition zone includes a first electrical section and a first sectionalizing switch connected in parallel on both sides of the first electrical section; the second transition zone includes a second electrical section and a second sectionalizing switch connected in parallel on both sides of the second electrical section; the traction substation includes a first voltage regulating converter, a second voltage regulating converter, and a third voltage regulating converter; the first voltage regulating converter is connected to a first adjustable power supply section via a first control switch; the second voltage regulating converter is connected to a second adjustable power supply section via a second control switch; and the third voltage regulating converter is connected to a third adjustable power supply section via a third control switch.

[0059] In some embodiments, the control device is configured to: in an initial state, control the first control switch and the third control switch to be in a closed state; controlling the closing of the first segment switch by the control device includes: controlling the first voltage regulating converter to operate, so as to adjust the voltage of the first adjustable power supply segment to be consistent with the voltage of the third adjacent segment, and controlling the first segment switch to close; controlling the closing of the second segment switch by the control device includes: controlling the third voltage regulating converter to operate, so as to adjust the voltage of the third adjustable power supply segment to be consistent with the voltage of the fourth adjacent segment, and controlling the second segment switch to close.

[0060] In some embodiments, the overhead contact system includes an upstream overhead contact system and a downstream overhead contact system, which are connected by parallel switches. Trains on the upstream and downstream overhead contact systems run in opposite directions. Both the upstream and downstream overhead contact systems include a third adjacent section, a first transition zone, a first adjustable power supply section, a third electrical sub-section, a second adjustable power supply section, a fourth electrical sub-section, a third adjustable power supply section, a second transition zone, and a fourth adjacent section, connected in sequence. The first transition zone includes a first electrical sub-section and a first sectionalizing switch connected in parallel on both sides of the first electrical sub-section. The second transition zone includes a second electrical sub-section and a second sectionalizing switch connected in parallel on both sides of the second electrical sub-section.

[0061] In some embodiments, the traction substation includes a fourth voltage regulating converter, a fifth voltage regulating converter, a sixth voltage regulating converter, and a seventh voltage regulating converter; the third electrical distribution section includes a downlink third electrical distribution section and an uplink third electrical distribution section, and the fourth electrical distribution section includes a downlink fourth electrical distribution section and an uplink fourth electrical distribution section; the fourth voltage regulating converter is connected to the uplink first adjustable power supply section and the downlink first adjustable power supply section respectively via an uplink first control switch; the fifth voltage regulating converter is connected to the downlink second adjustable power supply section via a downlink second control switch; the sixth voltage regulating converter is connected to the uplink second adjustable power supply section via an uplink second control switch; and the seventh voltage regulating converter is connected to the uplink third adjustable power supply section and the downlink third adjustable power supply section respectively via an uplink third control switch.

[0062] In some embodiments, the target power supply section of the overhead contact line connecting the traction substation and the adjacent power supply section on the overhead contact line are connected through the transition zone. The adjacent power supply section is the power supply section corresponding to the traction substation adjacent to the traction substation. The transition zone includes a switch and an electrical sub-section.

[0063] This specification provides one or more embodiments of a train power supply system, including: a first traction substation, a second traction substation, and a transition zone located between the first traction substation and the second traction substation; wherein, the first traction substation does not have a voltage regulation function, and the second traction substation does have a voltage regulation function; the first traction substation and the second traction substation are arranged alternately.

[0064] In some embodiments, the transition zone includes: at least one electrical segment and at least one switch connected in parallel across the two ends of the electrical segment; and at least two position sensors disposed between or on both sides of the at least one electrical segment.

[0065] In some embodiments, the transition zone includes: two electrical sub-sections and two switches connected in parallel at both ends of the electrical sub-sections, the two electrical sub-sections being connected by a contact wire; and three position sensors respectively disposed on the left side of the two electrical sub-sections, between the two electrical sub-sections, and on the right side of the two electrical sub-sections. Attached Figure Description

[0066] This specification will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting; in these embodiments, the same reference numerals denote the same structures, wherein:

[0067] Figure 1A These are exemplary schematic diagrams of train power supply systems according to some embodiments of this specification;

[0068] Figure 1B This is a schematic diagram of the topology of a train power supply system according to some embodiments of this specification;

[0069] Figure 2 This is a schematic diagram of the topology of a train power supply system according to some embodiments of this specification;

[0070] Figure 3 This is an exemplary flowchart illustrating the adjustment of the supply voltage according to some embodiments of this specification;

[0071] Figure 4 This is a schematic diagram of the topology of a train power supply system according to some embodiments of this specification;

[0072] Figure 5A This is an exemplary flowchart illustrating the adjustment of the supply voltage according to some embodiments of this specification;

[0073] Figure 5B This is an exemplary flowchart illustrating the adjustment of the supply voltage according to some embodiments of this specification;

[0074] Figure 6 This is a schematic diagram of the topology of a train power supply system according to some embodiments of this specification;

[0075] Figure 7A This is an exemplary flowchart illustrating the adjustment of the supply voltage according to some embodiments of this specification;

[0076] Figure 7B This is an exemplary flowchart illustrating the adjustment of the supply voltage according to some embodiments of this specification;

[0077] Figure 8 This is a schematic diagram of the topology of a train power supply system according to some embodiments of this specification;

[0078] Figure 9A This is an exemplary flowchart illustrating the adjustment of the supply voltage according to some embodiments of this specification;

[0079] Figure 9B This is an exemplary flowchart illustrating the adjustment of the supply voltage according to some embodiments of this specification;

[0080] Figure 9C This is an exemplary flowchart illustrating the adjustment of the supply voltage according to some embodiments of this specification;

[0081] Figure 9D This is an exemplary flowchart illustrating the adjustment of the supply voltage according to some embodiments of this specification;

[0082] Figure 10 This is an exemplary schematic diagram of another train power supply system according to some embodiments of this specification;

[0083] Figure 11 This is another exemplary flowchart of a control method for a train power supply system according to some embodiments of this specification;

[0084] Figure 12 This is an exemplary schematic diagram of another train power supply system according to some embodiments of this specification;

[0085] Figure 13A This is another exemplary flowchart of a control method for a train power supply system according to some embodiments of this specification;

[0086] Figure 13B This is another exemplary flowchart of a control method for a train power supply system according to some embodiments of this specification;

[0087] Figure 14 This is an exemplary schematic diagram of another train power supply system according to some embodiments of this specification.

[0088] Figure 15A This is another exemplary flowchart of a control method for a train power supply system according to some embodiments of this specification;

[0089] Figure 15B This is another exemplary flowchart of a control method for a train power supply system according to some embodiments of this specification;

[0090] Figure 16 This is a schematic diagram of the topology of another train power supply system according to some embodiments of this specification;

[0091] Figure 17 This is an exemplary flowchart illustrating the adjustment of the supply voltage according to some embodiments of this specification;

[0092] Figure 18 This is a schematic diagram of the topology of a train power supply system according to other embodiments of this specification;

[0093] Figure 19A This is an exemplary flowchart illustrating the adjustment of the supply voltage according to some embodiments of this specification;

[0094] Figure 19B This is another exemplary flowchart illustrating the adjustment of the supply voltage according to some embodiments of this specification;

[0095] Figure 20 This is a schematic diagram of the topology of a train power supply system according to other embodiments of this specification;

[0096] Figure 21A This is an exemplary flowchart illustrating the adjustment of the supply voltage according to some embodiments of this specification;

[0097] Figure 21B This is an exemplary flowchart illustrating the adjustment of the supply voltage according to other embodiments of this specification;

[0098] Figure 21C This is an exemplary flowchart illustrating the adjustment of the supply voltage according to other embodiments of this specification; and

[0099] Figure 22 This is a schematic diagram of the topology of a train power supply system according to other embodiments of this specification. Detailed Implementation

[0100] To more clearly illustrate the technical solutions of the embodiments in this specification, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this specification. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0101] It should be understood that the terms “system,” “device,” “unit,” and / or “module” used herein are one way to distinguish different components, elements, parts, sections, or assemblies at different levels. However, if other terms can achieve the same purpose, they may be replaced by other expressions.

[0102] As indicated in this specification and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0103] Flowcharts are used in this specification to illustrate the operations performed by the system according to embodiments of this specification. It should be understood that the preceding or following operations are not necessarily performed in exact order. Instead, the steps can be processed in reverse order or simultaneously. Furthermore, other operations can be added to these processes, or one or more steps can be removed from them.

[0104] To enable trains to automatically pass through transition zones between different power supply sections, the industry has proposed three automatic phase-switching methods: pole-mounted switch automatic switching, on-board automatic control power outage during phase / section transitions, and ground switch automatic switching. Among these, the pole-mounted switch automatic switching method has a power supply dead zone, resulting in a longer transition process when the train passes through phase / section transitions, potentially leading to severe overvoltage and inrush current problems, causing overcurrent tripping of the locomotive's main circuit breaker, and even potentially burning out locomotive equipment. The on-board automatic control power outage during phase / section transitions has a long power outage zone, resulting in significant train speed loss. The ground switch automatic switching method's phase / section transition location is limited by terrain conditions, and its vacuum circuit breaker coil requires a certain amount of time to operate, resulting in a power outage of approximately several hundred milliseconds.

[0105] The aforementioned automatic phase / section switching technology requires the train to be de-energized when passing through the electrical phase / section switching device. The train then coasts through the device using its inertia before being re-energized, experiencing a cycle of power de-energization and re-energization. This disrupts the continuous and smooth current collection from the overhead contact line by the pantograph, severely impacting the overall performance of the train's power supply system. For heavy-haul railways, the speed of heavy-haul trains is further reduced when passing through electrical phase / section switching devices. In special circumstances such as steep gradients or excessively high loads, this can even cause the train to stop on the slope, significantly impacting the safe and efficient operation of the railway.

[0106] To address the issue of needing to disconnect and reconnect power when a train passes through a transition zone, and to improve power supply stability when a train passes through a transition zone between different power supply sections, this specification provides a train power supply system and its control method in its embodiments. By setting up an adjustable voltage traction substation, the power supply voltage of the target power supply section connected to the traction substation is adjusted so that the difference between the power supply voltage of the target power supply section and the power supply voltage of the adjacent power supply section is within an acceptable range. Furthermore, by using a switch to form a circuit between different power supply sections, the train can pass smoothly without power disconnection when passing through the connection between the target power supply section and the adjacent power supply section.

[0107] Figure 1A This is a schematic diagram of the train power supply system according to some embodiments of this specification.

[0108] In some embodiments, such as Figure 1A As shown, the train power supply system 100 may include an overhead contact line 110, a traction substation 120, at least one transition zone 130, and a control device 140.

[0109] The overhead contact system (CATS 110) refers to the power supply system installed above railway lines to provide electrical energy to trains (e.g., high-speed trains). Figure 1A As shown, the overhead contact line 110 can contact the train's pantograph to supply power to the train.

[0110] A single overhead contact line can be divided into multiple overhead contact line power supply sections. In some embodiments, the overhead contact line power supply sections can be obtained by dividing the overhead contact line into electrical segmentation units. Electrical segmentation units refer to devices used at points in the overhead contact line with different voltage amplitudes or different voltage phases to prevent the overhead contact line from being connected when the pantograph passes through. Electrical segmentation units can divide the overhead contact line into multiple overhead contact line power supply sections. For example, i electrical segmentation units can divide the overhead contact line into n overhead contact line power supply sections, where i is an integer in the range [1, n], and n is a positive integer.

[0111] As a train travels along the line, its position changes, thus altering the contact wire power supply section that the train's pantograph contacts. A single contact wire can connect to multiple traction substations. Traction substations are used to convert electrical energy (e.g., three-phase high-voltage electricity) supplied by the power system to provide adjustable supply voltage (including voltage amplitude and phase) to one or more contact wire power supply sections.

[0112] Traction substation 120 refers to a traction substation that provides an adjustable power supply voltage (including voltage amplitude and phase) to the contact network power supply section included in the contact network 110.

[0113] In some embodiments, the traction substation 120 has a voltage regulation function. The traction substation 120 can convert the electrical energy provided by the power system (e.g., three-phase high-voltage electricity) into electrical energy suitable for electric traction (e.g., single-phase electricity) according to the voltage requirements of electric traction, and then transmit it to the overhead contact line to power the train.

[0114] Transition zone 130 refers to the connection area or connecting power supply section located between different overhead contact line power supply sections. In some embodiments, when a train passes through transition zone 130, the traction substation supplying power to the train will switch, such as when switching from one overhead contact line power supply section to another in transition zone 130. The length range of transition zone 130 can be divided according to actual application scenarios and requirements.

[0115] In some embodiments, transition zone 130 may include at least one. The number of transition zones 130 is related to the number of overhead contact line power supply sections. In some embodiments, when there are at least two transition zones 130, at least two transition zones 130 may be connected in series on the overhead contact line 110, for example, connected in series between multiple overhead contact line power supply sections.

[0116] In some embodiments, voltage drops during transmission due to line resistance and reactive power from various loads. When the voltage drops at different rates across the transition zone, the voltage received by the train changes as it passes through the transition zone 130.

[0117] The control device 140 is configured to control the traction substation 120 to adjust the supply voltage of the contact network (e.g., the contact network power supply section connected to the transition zone) on at least one side of the transition zone 130, so that the difference in supply voltage between the two sides of the transition zone meets a preset condition. For example, such as Figure 1A As shown, the control device 140 can control the power supply voltage of the contact network 110 on at least one side of the transition zone 130 of the traction substation 120.

[0118] The power supply voltage refers to the voltage supplied to the train by the overhead contact system or its power supply section. In some embodiments, the power supply voltage may include the voltage amplitude and / or voltage phase of the power supply voltage of the overhead contact system or its power supply section.

[0119] In some embodiments, the supply voltage can be obtained in various ways. For example, the control device can obtain the supply voltage of the contact wire or contact wire power supply section on both sides of the transition zone using voltmeters and phase meters respectively installed on both sides of the transition zone. The control device can also obtain the supply voltage on both sides of the transition zone using any other feasible method.

[0120] The voltage difference between the two sides of the transition zone includes the amplitude difference and / or phase difference of the voltage between the two contact network power supply sections within the transition zone.

[0121] To ensure that the train can pass through the transition zone smoothly and flexibly without power interruption, the voltage difference between the two sides of the transition zone needs to meet preset conditions.

[0122] In some embodiments, the preset conditions are determined based on the actual application scenario and requirements.

[0123] In some embodiments, the preset condition may be "the voltage difference between the supply voltages on both sides of the transition region (e.g., a first difference, a second difference, etc.) is less than a voltage threshold". The voltage threshold may be preset, for example, ±100V.

[0124] In some embodiments, the voltage threshold is the insulation withstand limit for arcing generated by the electrical segmentation of the pantograph-catenary circuit.

[0125] In some embodiments of this specification, by ensuring that the voltage difference in the supply voltage is less than the insulation withstand limit for pantograph-catenary arcing caused by the electrical shunt, it can be ensured that no pantograph-catenary arcing will occur when the train passes through the contact wire power supply sections on both sides of the transition zone. This helps to improve the stability and safety of the train power supply system.

[0126] In some embodiments, the control device 140 can control the traction substation 120 to adjust the power supply voltage of the contact network on at least one side of the transition zone 130 in various ways, so that the voltage difference between the two sides of the transition zone is less than a voltage threshold. For example, the control device 140 can acquire the power supply voltage on both sides of the transition zone 130 and dynamically adjust the power supply voltage of the contact network on at least one side of the transition zone through negative feedback adjustment, stopping the adjustment when the voltage difference between the two sides of the transition zone is less than a voltage threshold. For example, the control device can also control a voltage regulating converter connected to the contact network to perform voltage transformation operation on the power supply of the traction substation, thereby adjusting the power supply voltage of the contact network on at least one side of the transition zone within a certain range.

[0127] In some embodiments of this specification, based on the structure of the train power supply system described above, when the train approaches the transition zone on the overhead contact line, the control device controls the traction substation to adjust the power supply voltage of the overhead contact line on at least one side of the transition zone, so that the voltage difference between the two sides of the transition zone is less than the voltage threshold. This ensures that the train can pass through the transition zone or the overhead contact line power supply sections on both sides of the transition zone without interruption of power supply, and in a stable manner. This helps to improve the train's throughput capacity, ensure the safe and stable operation of the train, and avoid overhead contact line short circuits, train power outages, or pantograph arcing during the crossing process.

[0128] Figure 1B This is a schematic diagram of the topology of a train power supply system according to some embodiments of this specification. It should be noted that the following embodiments are for illustrative purposes only and do not constitute a limitation thereof.

[0129] In some embodiments, such as Figure 1B As shown, the transition zone can be either the first transition zone 130-1 or the second transition zone 130-2. At this time, the overhead contact line is divided into three sections. The power supply sections on both sides of the transition zone can be the power supply sections on both sides of the first transition zone 130-1 or the power supply sections on both sides of the second transition zone 130-2. According to the train's direction of travel, the three sections of the overhead contact line respectively include: the first adjacent section, the target power supply section, and the second adjacent section. For example... Figure 1B As shown, the overhead contact line 110 includes a first adjacent section 161-1, a target power supply section 170, and a second adjacent section 161-2. It can be understood that the first adjacent section 161-1 and the second adjacent section 161-2 are power supply sections adjacent to the target power supply section 170. The overhead contact line 110 can supply power to trains 151 and 152. Specifically, the first adjacent section 161-1 supplies power to train 150-1, and the target power supply section 170 supplies power to both trains 151 and 152.

[0130] The first transition zone 130-1 can connect the first adjacent segment 161-1 and the target power supply segment 170. The second transition zone 130-2 can connect the target power supply segment 170 and the second adjacent segment 161-2.

[0131] The target power supply section refers to the contact network power supply section that is powered by the traction substation 120. For example, if the train is traveling from left to right, the first adjacent section 161-1, the target power supply section 170, and the second adjacent section 161-2 can be the left-side power supply section, the middle power supply section, and the right-side power supply section on the contact network 110, respectively.

[0132] In some embodiments, when a train approaches the first transition zone 130-1 from the first adjacent section 161-1, the control device 140 can adjust the target power supply voltage of the target power supply section 170 by controlling the traction substation 120, so that the first difference between the target power supply voltage of the target power supply section 170 and the first power supply voltage of the first adjacent section 161-1 is less than a voltage threshold.

[0133] The target supply voltage refers to the supply voltage of the target supply segment 170. The first supply voltage refers to the supply voltage of the first adjacent segment 161-1. The first difference refers to the difference between the target supply voltage of the target supply segment 170 and the first supply voltage of the first adjacent segment 161-1.

[0134] In some embodiments, the first difference may include a first amplitude difference and a first phase difference between the target supply voltage of the target power supply segment 170 and the first supply voltage of the first adjacent segment 161-1.

[0135] In some embodiments, when a train approaches the second transition zone 130-2 from the target power supply section 170, the control device 140 can adjust the target power supply voltage of the target power supply section 170 by controlling the traction substation 120, so that the second difference between the target power supply voltage of the target power supply section 170 and the second power supply voltage of the second adjacent section 161-2 is less than a voltage threshold.

[0136] The second supply voltage refers to the supply voltage of the second adjacent segment 161-2. The second difference refers to the difference between the target supply voltage of the target supply segment and the second supply voltage of the second adjacent segment 161-2.

[0137] In some embodiments, the second difference may include a second amplitude difference and a second phase difference between the target supply voltage of the target power supply segment and the second supply voltage of the second adjacent segment 161-2.

[0138] Regarding the method for determining the first supply voltage, the second supply voltage, and the target supply voltage, and Figure 1A The method for determining the power supply voltage is similar and will not be repeated here.

[0139] In some embodiments, the transition zone may include at least one of an electrical segment, a switch, a voltage transformer, and a position sensor.

[0140] Electrically isolated sections are segmented insulators used to electrically separate two sections of contact network with different voltage amplitudes or phases. Electrically isolated sections can divide the contact network into multiple contact network power supply sections. Contact network power supply sections on either side of the same electrically isolated section are considered adjacent contact network power supply sections.

[0141] A switch is a device used to connect or disconnect the electrical connection between two sides of an electrical circuit. Switches are connected in parallel to the electrical circuit. By switching the switch on and off, the electrical connection and disconnection between the two sides of the electrical circuit can be achieved. Switches can be connected in parallel with electrical circuits. Switches can adopt any feasible structure, such as circuit breakers.

[0142] The voltage transformer is configured to detect the supply voltage information of the contact network on both sides of the transition zone. In some embodiments, the voltage transformer may include, but is not limited to, a capacitive voltage transformer, an electromagnetic voltage transformer, etc.

[0143] In some embodiments, voltage transformers can be installed on both sides of a transition zone.

[0144] Position sensors are configured to acquire the train's position information. For example, position sensors may include, but are not limited to, photoelectric sensors, GPS sensors, ultrasonic sensors, and pressure sensors. Based on the position sensors, the control device can determine the positional relationship between the train and the transition zone. For example, whether the train is approaching (e.g., the distance between the train's front and the position sensor is within a first distance threshold), arriving (e.g., the distance between the train's front and the position sensor is within a second distance threshold or the pressure sensor's measurement value is greater than a preset pressure threshold), or leaving the transition zone (e.g., the distance between the train's rear and the position sensor gradually increases). The first distance threshold is greater than the second distance threshold and can be set according to the actual installation location of the position sensors.

[0145] In some embodiments, the position sensor may be an axis counting sensor.

[0146] In some embodiments, the first transition zone includes at least one first switch, at least one first voltage transformer, and at least one first position sensor, and the second transition zone includes at least one second switch, at least one second voltage transformer, and at least one second position sensor. For example, a first voltage transformer and a first position sensor can be provided on each side of the first or second transition zone. As another example, a first voltage transformer and a first position sensor can be provided on the upstream side of the first transition zone. Here, the upstream side of the transition zone refers to the side of the transition zone opposite to the train's direction of travel.

[0147] In some embodiments, the control device 140 may control the opening and closing of the first switch and / or the second switch, and control the traction substation to adjust the target power supply voltage of the target power supply section based on the train's location information, the power supply voltage information of the overhead contact line, and the switch status information of the first switch and / or the second switch, so that the first difference between the target power supply voltage of the target power supply section and the first power supply voltage of the first adjacent section 161-1 is less than a voltage threshold, or the second difference between the target power supply voltage of the target power supply section and the second power supply voltage of the second adjacent section 161-2 is less than a voltage threshold.

[0148] The control device 140 can obtain the position information of the train through the position sensor and obtain the power supply voltage information of the contact network through the voltage transformer.

[0149] The switch status information includes open (or disconnected) and closed states. When the switch is in the open state, the electrical circuit connected in parallel with the switch is in an open circuit state; when the switch is in the closed state, the electrical circuit connected in parallel with the switch is in a short circuit state.

[0150] In some embodiments, the control device 140 may determine whether the train has passed through the first adjacent section 161-1 and is approaching or reaching the target power supply section based on the train's position information; in response to the train passing through the first adjacent section 161-1 and approaching or reaching the target power supply section, the control device 140 controls the first switch to open based on the switch state information of the first switch, and controls the traction substation 120 to adjust the target power supply voltage of the target power supply section based on the power supply voltage information of the contact network (e.g., the first power supply voltage of the first adjacent section and the target power supply voltage of the target power supply section), so that the first difference between the target power supply voltage of the target power supply section and the first power supply voltage of the first adjacent section 161-1 is less than a voltage threshold.

[0151] In some embodiments, the control device 140 may determine whether the train has passed through the target power supply section and is approaching or reaching the second adjacent section 161-2 based on the train's position information; in response to the train passing through the target power supply section and approaching or reaching the second adjacent section 161-2, the control device 140 controls the first switch to close and the second switch to open based on the switch state information of the first switch and the switch state information of the second switch, and controls the traction substation 120 to adjust the second power supply voltage of the second adjacent section 161-2 based on the power supply voltage information of the contact network (e.g., the target power supply voltage of the target power supply section and the second power supply voltage of the second adjacent section 161-2), so that the second difference between the target power supply voltage of the target power supply section and the second power supply voltage of the second adjacent section 161-2 is less than a voltage threshold.

[0152] In one specific embodiment, the first transition zone includes a first electrical shunt, a first switch, two first voltage transformers, and two first position sensors; the second transition zone includes a second electrical shunt, a second switch, two second voltage transformers, and two second position sensors. For more information on this part, please refer to [link to relevant documentation]. Figures 2 to 3 And its related descriptions.

[0153] In one specific embodiment, the first transition zone includes a first electrical section, a third electrical section, two first switches, two first voltage transformers, and three first position sensors; the second transition zone includes a second electrical section, a second switch, two second voltage transformers, and two second position sensors. For more information on this part, please refer to [link to relevant documentation]. Figure 4 , Figure 5A , Figure 5B And its related descriptions.

[0154] In one specific embodiment, the first transition zone includes a first electrical segment, a first switch, two first voltage transformers, and two first position sensors; the second transition zone includes a second electrical segment, a fourth electrical segment, two second switches, two second voltage transformers, and three second position sensors. For more information on this part, please refer to... Figure 6 , Figure 7A , Figure 7B And its related descriptions.

[0155] In one specific embodiment, the first transition zone includes a first electrical segment, a third electrical segment, two first switches, two first voltage transformers, and three first position sensors; the second transition zone includes a second electrical segment, a fourth electrical segment, two second switches, two second voltage transformers, and three second position sensors. For more information on this part, please refer to [link to relevant documentation]. Figures 8 to 9D And its related descriptions.

[0156] Figure 2 This is a schematic diagram of the topology of a train power supply system according to some embodiments of this specification. It should be noted that the following embodiments are for illustrative purposes only and do not constitute a limitation thereof.

[0157] In some embodiments, such as Figure 2As shown, the first transition zone 250 consists of a first electrical section 231-2, a first switch 251-1, two first voltage transformers (e.g., 252-1, 252-2), and two first position sensors (e.g., 253-1, 253-2). The first switch 251-1 is connected in parallel across the two ends of the first electrical section 231-2. The two first voltage transformers (e.g., 252-1, 252-2) are respectively disposed on the first side and the second side of the first electrical section 231-2. The two first position sensors (e.g., 253-1, 253-2) are respectively disposed on the first side and the second side of the first electrical section 231-2. In some embodiments, such as... Figure 2 As shown, the second transition zone 260 consists of a second electrical section 231-4, a second switch 261-1, two second voltage transformers (such as 262-1 and 262-2), and two second position sensors (such as 263-1 and 263-2). The second switch 261-1 is connected in parallel across the two ends of the second electrical section 231-4. The two second voltage transformers (such as 262-1 and 262-2) are respectively located on the first and second sides of the second electrical section 231-4. The two second position sensors (such as 263-1 and 263-2) are respectively located on the first and second sides of the second electrical section.

[0158] The first electrical section is the electrical section within the first transition zone. The first switch is the switch within the first transition zone. The first voltage transformer is the voltage transformer within the first transition zone. The first position sensor is the position sensor within the first transition zone. The first side of the first electrical section is the side opposite to the train's direction of travel, and the second side is the side of the first electrical section in the same direction as the train's direction of travel. For example, when the train is traveling to the right along the track, the first side of the first electrical section is the left side of the first electrical section, and the second side is the right side of the first electrical section.

[0159] The second electrical section is the electrical section within the second transition zone. The second switch is the switch within the second transition zone. The second voltage transformer is the voltage transformer within the second transition zone. The second position sensor is the position sensor within the second transition zone. The first side of the second electrical section is the side opposite to the train's direction of travel, and the second side is the side of the second electrical section in the same direction as the train's direction of travel. For example, when the train is traveling to the right along the track, the first side of the second electrical section is the left side of the second electrical section, and the second side is the right side of the second electrical section.

[0160] Figure 2The traction substation 211-1, transition zones (e.g., first transition zone 250, second transition zone 260), control device 280, electrical substations (e.g., first electrical substation 231-2, second electrical substation 231-4), switches (e.g., first switch 251-1, second switch 261-1), voltage transformers (e.g., first voltage transformers 252-1, 252-2, second voltage transformers 262-1, 262-2), and position sensors (e.g., first position sensors 253-1, 253-2, second position sensors 263-1, 263-2), etc., shown are related to... Figure 1A and Figure 1B The corresponding components (e.g., traction substation 120, transition zone 130, control device 140, etc.) have similar structures; for more details, please refer to [link to relevant documentation]. Figure 1A and 1B Relevant parts.

[0161] Figure 3 This is an exemplary flowchart illustrating the adjustment of the supply voltage according to some embodiments of this specification. Figure 3 As shown, process 300 may include the following steps. In some embodiments, process 300 may be executed based on a control device.

[0162] In some embodiments, for Figure 2 In the initial state of the train power supply system 200 shown, the first switch 251-1 of the first transition zone 250 and the second switch 261-1 of the second transition zone 260 are both in the off state.

[0163] Step 310: When the first position sensor located on the first side of the first electrical substation detects the arrival of a train, the control device controls the traction substation to adjust the voltage so that the first difference between the two first voltage transformers is less than a voltage threshold. That is, the control device 280 controls the traction substation to adjust the voltage so that the first difference between the target power supply voltage of the target power supply section and the first power supply voltage of the first adjacent section is less than a voltage threshold.

[0164] Step 320: When the second position sensor located on the first side of the second electrical substation detects the arrival of a train, the control device controls the traction substation to adjust the voltage so that the second difference between the two second voltage transformers is less than the voltage threshold. That is, the control device 280 controls the traction substation to adjust the voltage so that the second difference between the target power supply voltage of the target power supply section and the second power supply voltage of the second adjacent section is less than the voltage threshold.

[0165] More information about the first electrical section, the second electrical section, the control device, the traction substation, the first voltage transformer, the second voltage transformer, and the voltage threshold can be found in [link to relevant documentation]. Figure 1A , Figure 1B and Figure 2And its related descriptions.

[0166] Combining the above and Figure 2 As an example only, in the initial state, the control device 280 controls the first switch 251-1 of the first transition zone 250 and the second switch 261-1 of the second transition zone 260 to open. During train operation, when the first position sensor 253-1 on the first side of the first electrical section 231-2 detects the arrival of a train, the control device 280 can control the traction substation 211-1 to adjust the power supply voltage so that the first difference between the first voltage transformer 252-1 and the first voltage transformer 252-2 is less than the voltage threshold (that is, the first difference between the target power supply voltage of the target power supply section and the first power supply voltage of the first adjacent section 230-2 is less than the voltage threshold), so that the train can pass through the first electrical section 231-2 of the first transition zone 250 without power interruption. When the first position sensor 253-2 on the second side of the first electrical section 231-2 detects the arrival of a train, it can be considered that the train has left the first transition zone 250. When the second position sensor 263-1 on the first side of the second electrical section 231-4 detects a train approaching / arriving, the control device 280 can control the traction substation 211-1 to adjust the power supply voltage so that the second voltage difference between the second voltage transformer 262-1 and the second voltage transformer 262-2 is less than the voltage threshold (that is, the second voltage difference between the target power supply voltage of the target power supply section and the second power supply voltage of the second adjacent section 230-5 is less than the voltage threshold). This ensures that the train can pass through the electrical phases on both sides of the transition zone without power interruption, and can pass through the second electrical section 231-4 of the second transition zone 260 without power interruption. When the second position sensor 263-2 on the second side of the second electrical section 231-4 detects a train arriving, it can be considered that the train has left the second transition zone 260, completing the train's journey from the first adjacent section 230-2 to the second adjacent section 230-5.

[0167] In some embodiments of this specification, by setting up an electrical section in the transition zone and controlling the voltage adjustment of the traction substation through a control device, it can be ensured that the voltage amplitude and voltage phase on both sides of the electrical section are similar (e.g., less than the voltage threshold) or even the same. This ensures that the train can pass smoothly with power without performing a phase-splitting operation when passing through the transition zone, thereby eliminating the unpowered area in the electrical phase-splitting of traditional substations and enabling the train to pass through the first and second transition zones flexibly and without power interruption.

[0168] Figure 4 This is a schematic diagram of the topology of a train power supply system according to some embodiments of this specification. It should be noted that the following embodiments are for illustrative purposes only and do not constitute a limitation thereof.

[0169] In some embodiments, such as Figure 4As shown, the first transition zone 450 consists of a first electrical section 431-2, a third electrical section 431-3, two first switches (such as 451-1 and 451-2), two first voltage transformers (such as 452-1 and 452-2), and three first position sensors (such as 453-1, 453-2 and 453-3). Among them, two first switches (such as 451-1 and 451-2) are connected in parallel at both ends of the first electrical section 431-2 and the third electrical section 431-3, respectively; two first voltage transformers (such as 452-1 and 452-2) are respectively located on the first side of the first electrical section 431-2 and the second side of the third electrical section 431-3; and three first position sensors (such as 453-1, 453-2, and 453-3) are respectively located on the first side of the first electrical section 431-2, between the first electrical section 431-2 and the third electrical section 431-3, and on the second side of the third electrical section 431-3.

[0170] The third electrical sub-section 431-3 is located within the first transition zone. Its function is similar to that of the first electrical sub-section, except that it is situated on the second side of the first electrical sub-section. The second side of the third electrical sub-section 431-3 is the side facing the same direction of train travel as the two sides of the sub-section. For example, when the train is traveling to the right along the track, the second side of the third electrical sub-section is its right side.

[0171] The first transition zone 450, the first switch (e.g., 451-1, 451-2), the first voltage transformer (e.g., 452-1, 452-2), the first position sensor (e.g., 453-1, 453-2, 453-3), and the first electrical shunt 431-2 are respectively connected to... Figure 2 The first transition zone 250, the first switch (such as the first switch 251-1), the first voltage transformer (such as 252-1, 252-2), the first position sensor (such as 253-1, 253-2), and the first electrical shunting section 231-2 have similar structures. For more details, please refer to [link / reference needed]. Figure 2 Related explanations.

[0172] In some embodiments, such as Figure 4 As shown, the second transition zone 460 consists of a second electrical section 431-5, a second switch (such as second switch 461-1), two second voltage transformers (such as 462-1 and 462-2), and two second position sensors (such as 463-1 and 463-2). The second switch 461-1 is connected in parallel across the two ends of the second electrical section 431-5. The two second voltage transformers (such as 462-1 and 462-2) are respectively located on the first and second sides of the second electrical section 431-5. The two second position sensors (such as 463-1 and 463-2) are respectively located on the first and second sides of the second electrical section 431-5.

[0173] For more information on the second transition zone 460, the second switch (e.g., second switch 461-1), the second voltage transformer (e.g., 462-1, 462-2), the second position sensor (e.g., 463-1, 463-2), and the second electrical sectionalizing section 431-5, please refer to [link to relevant documentation]. Figure 1A , Figure 1B and Figure 2 (For example, related descriptions of the second transition zone 260, the second electrical section 231-4, the second switch 261-1, the second voltage transformer 262-1, 262-2, and the second position sensor 263-1, 263-2.)

[0174] For more information on control devices, traction substations, electrical sections, power supply voltage, preset conditions, etc., please refer to [link / reference]. Figure 1A , Figure 1B and Figure 2 Description of the corresponding components.

[0175] In some embodiments, for Figure 4 The train power supply system 400 shown can employ different control methods based on whether a train simultaneously arrives at the first transition zone and the second transition zone. For example, when no train simultaneously arrives at the first transition zone and the second transition zone, the control device can use the control method of process 500A. When a train simultaneously arrives at the first transition zone and the second transition zone, the control device can use the control method of process 500B.

[0176] Figure 5A This is an exemplary flowchart illustrating the adjustment of the supply voltage according to some embodiments of this specification. Figure 5A As shown, process 500A may include the following steps. In some embodiments, process 500A may be executed based on control device 440.

[0177] In some embodiments, for Figure 4 The train power supply system 400 shown can initially be in the following state: the first switch in the first transition zone 450 connected in parallel with the first electrical sub-section is open; the first switch in the third electrical sub-section is closed; and the second switch in the second transition zone is open.

[0178] In some embodiments, for Figure 4 When the train power supply system 400 shown detects that no train has arrived at the same time, the control device 440 can perform the following steps 510A to 520A.

[0179] In step 510A, if the train reaches the first position sensor (e.g., first position sensor 453-1) located on the first side of the first electrical substation (e.g., first electrical substation 431-2), the control device (e.g., control device 440) controls the traction substation (e.g., traction substation 411-1) to adjust the voltage so that the first difference between the two first voltage transformers (e.g., first voltage transformers 452-1 and 452-2) is less than a voltage threshold. That is, the control device 440 controls the traction substation 411-1 to adjust the voltage so that the first difference between the target supply voltage of the target power supply section and the first supply voltage of the first adjacent section is less than a voltage threshold.

[0180] In step 520A, if the train reaches the second position sensor (e.g., second position sensor 463-1) located on the first side of the second electrical substation (e.g., second electrical substation 431-5), the control device (e.g., control device 440) controls the traction substation (e.g., traction substation 411-1) to adjust the voltage so that the second difference between the two second voltage transformers (e.g., second voltage transformers 462-1 and 462-2) is less than the voltage threshold. That is, the control device 440 controls the traction substation 411-1 to adjust the voltage so that the second difference between the target supply voltage of the target power supply section and the second supply voltage of the second adjacent section is less than the voltage threshold.

[0181] More information about the first electrical section, the second electrical section, the control device, the traction substation, the first voltage transformer, the second voltage transformer, and the voltage threshold can be found in [link to relevant documentation]. Figure 1A , Figure 1B and Figure 2 And its related descriptions.

[0182] Combining the above and Figure 4As an example only, in the initial state, the control device 440 controls the first switch 451-1 connected in parallel to the first electrical sub-section 431-2 in the first transition zone 450 to open, the first switch 451-2 connected in parallel to the third electrical sub-section 431-3 to close, and the second switch 461-1 in the second transition zone 460 to open. During the train's operation, when the first position sensor 453-1 on the first side of the first electrical sub-section 431-2 and the second position sensor 463-1 on the first side of the second electrical sub-section 431-5 detect that no train has arrived simultaneously, and the first position sensor 453-1 on the first side of the first electrical sub-section 431-2 detects that a train has arrived, the control device 440 can control the traction substation 411-1 to adjust the power supply voltage so that the first difference between the first voltage transformer 452-1 and the first voltage transformer 452-2 is less than the voltage threshold. When the first position sensor 453-3 on the second side of the third electrical section 431-3 detects the arrival of train 470-1, it can be considered that train 470-1 has left the first transition zone 450. When the first position sensor 453-1 on the first side of the first electrical section 431-2 and the second position sensor 463-1 on the first side of the second electrical section 431-5 detect no trains arriving simultaneously, and the second position sensor 463-1 on the first side of the second electrical section 431-5 detects the arrival of train 470-2, the control device 440 can control the traction substation 411-1 to adjust the power supply voltage so that the second difference between the second voltage transformer 462-1 and the second voltage transformer 462-2 is less than the voltage threshold. When the second position sensor 463-2 on the second side of the second electrical section 431-5 detects the arrival of a train, it can be considered that train 470-2 has left the second transition zone, completing the train's journey from the first adjacent section to the second adjacent section.

[0183] Among them, the traction substation 411-1 and the control device 440 have the same structure and Figure 1A , Figure 1B and Figure 2 The traction substations 120 / 211-1 and control devices 140 / 280 shown in the diagram have similar structures. For more information on how the control devices regulate the voltage of the traction substations, please refer to [link to relevant documentation]. Figure 1A , Figure 1B and Figure 2 Related explanations.

[0184] In some embodiments of this specification, when the train reaches the first position sensor located on the first side of the first electrical substation, the control device controls the traction substation to adjust the voltage so that the first difference between the two first voltage transformers is less than a voltage threshold. Without switching the opening and closing states of the first and second switches, the first train can smoothly pass through the first transition zone. Similarly, when the train reaches the second position sensor located on the first side of the second electrical substation, the control device controls the traction substation to adjust the voltage so that the second difference between the two second voltage transformers is less than a voltage threshold. Without switching the opening and closing states of the first and second switches, the second train can smoothly pass through the second transition zone. Through the above method, the train can flexibly and continuously pass through the first or second transition zone.

[0185] Figure 5B This is an exemplary flowchart illustrating the adjustment of the supply voltage according to some embodiments of this specification. Figure 5B As shown, process 500B may include the following steps. In some embodiments, process 500B may be executed based on control device 440.

[0186] In some embodiments, for Figure 4 When the first position sensor located on the first side of the first electrical sub-section and the second position sensor located on the first side of the second electrical sub-section detect that a train has arrived at the same time, the control device can execute the following steps 510B to 530B.

[0187] Step 510B: Using the control device, firstly, the first switch connected in parallel to the third electrical sub-section in the first transition zone 450 is opened, and then the first switch connected in parallel to the first electrical sub-section is closed. While controlling the first switch to open or close, the control device controls the traction substation 411-1 to adjust the voltage so that the second difference between the two second voltage transformers passing through the second transition zone 460 is less than the voltage threshold (that is, the second difference between the target power supply voltage of the target power supply section connected through the second transition zone and the second power supply voltage of the second adjacent section is less than the voltage threshold). This allows the first train located on the first side of the first electrical sub-section to pass through the first electrical sub-section without power interruption, while the second train passes through the second transition zone.

[0188] The first train refers to the train detected by the first position sensor on the first side of the first electrical sub-section when both the first position sensor on the first side of the first electrical sub-section and the second position sensor on the first side of the second electrical sub-section detect the arrival of another train simultaneously. The second train refers to the train that needs to pass through the second transition zone.

[0189] Step 520B: If the first train in the first transition zone reaches the first position sensor 453-2 located between the first electrical substation 431-2 and the third electrical substation 431-3, the control device 440 controls the traction substation 411-1 to adjust the voltage so that the first difference between the two first voltage transformers in the first transition zone 450 is less than the voltage threshold (that is, the first difference between the target power supply voltage of the target power supply section connected through the first transition zone and the first power supply voltage of the first adjacent section is less than the voltage threshold), thereby allowing the first train to pass through the third electrical substation 431-3 of the first transition zone without power and reach the first position sensor 453-3 located on the second side of the third electrical substation.

[0190] Step 530B: After the first train passes through the first transition zone, the control device first controls the first switch connected in parallel to the first electrical sub-section of the first transition zone to open, and then controls the first switch connected in parallel to the third electrical sub-section to close.

[0191] For more information on the first electrical section, second electrical section, third electrical section, control device, traction substation, first voltage transformer, second voltage transformer, and voltage threshold, please refer to [link to relevant documentation]. Figure 1A , Figure 1B , Figure 2 and Figure 4 And its related descriptions.

[0192] Combining the above and Figure 4As an example only, in the initial state, the control device 440 controls the first switch 451-1 connected in parallel with the first electrical section 431-2 in the first transition zone 450 to open, the first switch 451-2 connected in parallel with the third electrical section 431-3 to close, and the second switch 461-1 in the second transition zone 460 to open. During train operation, when the first position sensor 453-1 located on the first side of the first electrical section 431-2 detects the arrival of the first train 470-1 and the second position sensor 453-1 located on the first side of the second electrical section 431-5 detects the arrival of the second train 470-2 simultaneously, the control device 440 can control the first switch 451-1 connected in parallel to the first electrical section 431-2 in the first transition zone 450 to close and the first switch 451-2 connected in parallel to the third electrical section 431-3 to open. It also controls the traction substation 411-1 to adjust the voltage so that the second voltage difference between the second voltage transformer 462-1 and the second voltage transformer 462-2 in the second transition zone 460 is less than the voltage threshold. The closing of the first switch 451-1 electrically connects both sides of the first electrical section 431-2, thereby eliminating the voltage difference between the two sides of the first electrical section 431-2, allowing the first train 470-1 to pass smoothly through the first electrical section 431-2. When the second train 470-2 synchronously passes through the second electrical substation 431-5, it can still pass smoothly because the second voltage difference between the second voltage transformer 462-1 and the second voltage transformer 462-2 in the second transition zone 460 is less than the voltage threshold. When the first train 470-1 in the first transition zone 450 passes through the first electrical substation 431-2 and reaches the first position sensor 453-2 located between the first electrical substation 431-2 and the third electrical substation 431-3, the second train 470-2 has already successfully passed through the second transition zone 460. Therefore, it is only necessary to focus on whether the first train 470-1 can successfully pass through the first transition zone 450. At this time, the control device 440 can control the traction substation 411-1 to adjust the voltage so that the first voltage difference between the first voltage transformer 452-1 and the first voltage transformer 452-2 in the first transition zone 450 is less than the voltage threshold, thereby ensuring that the first train can successfully pass through the third electrical substation 431-3. When the first position sensor 453-2, located on the second side of the third electrical sub-section 431-3, detects the arrival of the first train, it indicates that the first train 470-1 has passed through the first transition zone 450. At this time, the control device 440 can first control the first switch 451-1, which is connected in parallel to the first electrical sub-section 431-2 in the first transition zone 450, to open, and then control the first switch 451-2, which is connected in parallel to the third electrical sub-section 431-3, to close. Figure 4 The first switch (such as 451-1, 451-2) and the second switch 461-1 in the train power supply system 400 shown are in their initial state.

[0193] In some embodiments of this specification, for Figure 4 The train power supply system 400 shown can achieve flexible and uninterrupted passage of both the first and second trains through the first and second transition zones via the above process 500B.

[0194] Figure 6 This is a schematic diagram of the topology of a train power supply system according to some embodiments of this specification. It should be noted that the following embodiments are for illustrative purposes only and do not constitute a limitation thereof.

[0195] In some embodiments, such as Figure 6 As shown, the first transition zone 650 consists of a first electrical section 631-2, a first switch 651-1, two first voltage transformers (such as 652-1 and 652-2), and two first position sensors (such as 653-1 and 653-2). The first switch is connected in parallel across the two ends of the first electrical section 631-2. The two first voltage transformers (such as 652-1 and 652-2) are respectively located on the first side and the second side of the first electrical section 631-2. The two first position sensors (such as 653-1 and 653-2) are respectively located on the first side and the second side of the first electrical section 631-2.

[0196] In some embodiments, such as Figure 6 As shown, the second transition zone 660 consists of a second electrical section 631-4, a fourth electrical section 631-5, two second switches (such as 661-1 and 661-2), two second voltage transformers (such as 662-1 and 662-2), and three second position sensors (such as 663-1, 663-2 and 663-3). Among them, two second switches (such as 661-1 and 661-2) are connected in parallel across the two ends of the second electrical section 631-4 and the fourth electrical section 631-5, respectively; two second voltage transformers (such as 662-1 and 662-2) are respectively located on the first side of the second electrical section 631-4 and the second side of the fourth electrical section 631-5; and three second position sensors (such as 663-1, 663-2, and 663-3) are respectively located on the first side of the second electrical section 631-4, between the second electrical section 631-4 and the fourth electrical section 631-5, and on the second side of the fourth electrical section 631-5.

[0197] The fourth electrical substation is located within the second transition zone. Its function is similar to the second electrical substation, but the difference lies in its location on the second side of the second substation. The second side of the fourth electrical substation is the side facing the same direction of train travel. For example, when the train is traveling to the right along the track, the second side of the fourth electrical substation is its right side.

[0198] For more information on control devices, traction substations, electrical sections, power supply voltage, preset conditions, first transition zone, first switch, first voltage transformer, first position sensor, second transition zone, second switch, second voltage transformer, and second position sensor, please refer to [link to relevant documentation]. Figure 1A , Figure 1B and Figure 2 Description of the corresponding components.

[0199] In some embodiments, for Figure 6 The train power supply system 600 shown can employ different control methods based on whether a train simultaneously arrives at the first transition zone and the second transition zone. For example, when no train simultaneously arrives at the first transition zone and the second transition zone, the control device 680 can use the control method of process 700A. When a train simultaneously arrives at the first transition zone and the second transition zone, the control device 680 can use the control method of process 700B.

[0200] Figure 7A This is an exemplary flowchart illustrating the adjustment of the supply voltage according to some embodiments of this specification. Figure 7A As shown, process 700A may include the following steps. In some embodiments, process 700A may be executed based on a control device.

[0201] In some embodiments, for Figure 6 The train power supply system 600 shown can initially be in the following state: the first switch of the first transition zone 650 is open, the second switch of the second transition zone 660 connected in parallel to the second electrical sub-section is open, and the second switch of the fourth electrical sub-section is closed.

[0202] In some embodiments, for Figure 6 When the first position sensor located on the first side of the first electrical sub-section and the second position sensor located on the first side of the second electrical sub-section detect that no train has arrived at the same time, the control device 680 can perform the following steps 710A to 720A.

[0203] Step 710A: If the train reaches the first position sensor located on the first side of the first electrical substation, the control device controls the traction substation to adjust the voltage so that the first difference between the two first voltage transformers is less than the voltage threshold. That is, the control device 680 controls the traction substation 611-1 to adjust the voltage so that the first difference between the target power supply voltage of the target power supply section and the first power supply voltage of the first adjacent section is less than the voltage threshold.

[0204] Step 720A: If the train reaches the second position sensor located on the first side of the second electrical substation, the control device adjusts the voltage regulation of the traction substation so that the second difference between the two second voltage transformers is less than the voltage threshold. That is, the control device 680 controls the voltage regulation of the traction substation 611-1 so that the second difference between the target power supply voltage of the target power supply section and the second power supply voltage of the second adjacent section is less than the voltage threshold.

[0205] More information about the first electrical section, the second electrical section, the control device, the traction substation, the first voltage transformer, the second voltage transformer, and the voltage threshold can be found in [link to relevant documentation]. Figure 1A , Figure 1B and Figure 2 Related descriptions in Chinese.

[0206] Combining the above and Figure 7A As an example only, in the initial state, the control device 680 controls the first switch 651-1 of the first transition zone 650 to open, the second switch 661-1 of the second transition zone 660 connected in parallel to the second electrical section 631-4 to open, and the second switch 661-2 connected in parallel to the fourth electrical section 631-5 to close. During the train's operation, when the first position sensor 653-1 on the first side of the first electrical section 631-2 and the second position sensor 663-1 on the first side of the second electrical section 631-4 detect that no train has arrived at the same time, and the first position sensor 653-1 on the first side of the first electrical section 631-2 detects that train 670-1 has arrived, the control device 680 can control the traction substation 611-1 to adjust the power supply voltage so that the first difference between the first voltage transformer 652-1 and the first voltage transformer 652-2 is less than the voltage threshold. When the first position sensor 653-2 on the second side of the first electrical section 631-2 detects the arrival of a train, it can be considered that train 670-1 has left the first transition zone 650. When the first position sensor 653-1 on the first side of the first electrical section 631-2 and the second position sensor 663-1 on the first side of the second electrical section 631-4 detect no train arrival at the same time, and the second position sensor 663-1 on the first side of the second electrical section 631-4 detects the arrival of train 670-2, the control device 680 can control the traction substation 611-1 to adjust the power supply voltage so that the second difference between the second voltage transformer 662-1 and the second voltage transformer 662-2 is less than the voltage threshold. When the second position sensor 663-3 on the second side of the fourth electrical section 631-5 detects the arrival of a train, it can be considered that train 670-2 has left the second transition zone 660, completing the train's journey from the first adjacent section to the second adjacent section.

[0207] For more information on how the control device regulates the voltage of the traction substation, please refer to [link / reference needed]. Figure 1A , Figure 1B and Figure 2 Related explanations.

[0208] In some embodiments of this specification, when the train reaches the first position sensor located on the first side of the first electrical substation, the control device 680 controls the traction substation 611-1 to adjust the voltage so that the first difference between the two first voltage transformers is less than a voltage threshold. Without switching the opening and closing states of the first and second switches, the first train can smoothly pass through the first transition zone. Similarly, when the train reaches the second position sensor located on the first side of the second electrical substation, the control device 680 controls the traction substation 611-1 to adjust the voltage so that the second difference between the two second voltage transformers is less than a voltage threshold. Without switching the opening and closing states of the first and second switches, the second train can smoothly pass through the second transition zone. Through the above method, the train can flexibly and continuously pass through the first or second transition zone.

[0209] Figure 7B This is an exemplary flowchart illustrating the adjustment of the supply voltage according to some embodiments of this specification. Figure 7B As shown, process 700B may include the following steps. In some embodiments, process 700B may be executed based on control device 680.

[0210] In some embodiments, for Figure 6 When the first position sensor located on the first side of the first electrical sub-section and the second position sensor located on the first side of the second electrical sub-section detect that a train is arriving at the same time, the control device 680 can execute the following steps 710B to 730B.

[0211] Step 710B: Using a control device, firstly, the second switch of the second transition zone connected in parallel to the fourth electrical sub-section is opened; then, the second switch of the second transition zone connected in parallel to the second electrical sub-section is closed. While controlling the second switch to open or close, the control device controls the voltage adjustment of the traction substation so that the first difference between the target power supply voltage of the target power supply section and the first power supply voltage of the first adjacent section is less than the voltage threshold (that is, the first difference between the two first voltage transformers is less than the voltage threshold). Thus, the first train located at the first position sensor on the first side of the first electrical sub-section passes through the first electrical sub-section, while the second train located at the second position sensor on the first side of the second electrical sub-section passes through the second electrical sub-section without power interruption.

[0212] Step 720B: When the second train passes through the second electrical sub-section and arrives at the second position sensor located between the second electrical sub-section and the fourth electrical sub-section, the control device controls the traction substation to adjust the voltage so that the second difference between the target power supply voltage of the target power supply section and the second power supply voltage of the second adjacent section is less than the voltage threshold (that is, the second difference between the two second voltage transformers is less than the voltage threshold), thereby allowing the second train to pass through the second transition zone.

[0213] Step 730B: After the second train passes through the second transition zone, the control device first controls the second switch connected in parallel to the second electrical sub-section of the second transition zone to open, and then controls the second switch connected in parallel to the fourth electrical sub-section to close.

[0214] For more information on the control device's regulation of the traction substation voltage in process 700B, please refer to [link to relevant documentation]. Figure 1A , Figure 1B and Figure 2 Related explanations.

[0215] Combining the above and Figure 7BAs an example only, in the initial state, the control device 680 controls the first switch 651-1 of the first transition zone 650 to open, the second switch 661-1 of the second transition zone 660 connected in parallel to the second electrical sub-section 631-4 to open, and the second switch 661-2 connected in parallel to the fourth electrical sub-section 631-5 to close. During train operation, when the first position sensor 653-1 on the first side of the first electrical sub-section 631-2 and the second position sensor 663-1 on the first side of the second electrical sub-section 631-4 detect that no train has arrived at the same time, if a train arrives at the first position sensor 653-1 on the first side of the first electrical sub-section 631-2, the control device 680 can control the traction substation 611-1 to adjust the voltage so that the first difference between the target power supply voltage of the target power supply section and the first power supply voltage of the first adjacent section is less than the voltage threshold. If a train reaches the second position sensor 663-1 located on the first side of the second electrical substation 631-4, the control device 680 controls the traction substation 611-1 to adjust the voltage so that the second difference between the target power supply voltage of the target power supply section and the second power supply voltage of the second adjacent section is less than the voltage threshold. When the first position sensor 653-1 located on the first side of the first electrical substation 631-2 and the second position sensor 663-1 located on the first side of the second electrical substation 631-4 detect that a train has arrived at the same time, the control device 680 first controls the second switch 661-2 connected in parallel to the fourth electrical substation 631-5 in the second transition zone 660 to open, and then controls the second switch 661-1 connected in parallel to the second electrical substation 631-4 in the second transition zone 660 to close. While controlling the second switch to open or close, the control device 680 controls the traction substation 611-1 to close. The voltage of substation 661-1 is adjusted so that the first difference between the first voltage transformer 652-1 and the first voltage transformer 652-2 is less than the voltage threshold. As a result, the first train 670-1, which is located at the first position sensor 653-1 on the first side of the first electrical section 631-2, passes through the first electrical section 631-2. At the same time, the second train 670-2, which is located at the second position sensor 663-1 on the first side of the second electrical section 631-4, passes through the second electrical section 631-4 without being powered on.When the second train 670-2 passes through the second electrical substation 631-4 and reaches the second position sensor 663-2 located between the second electrical substation 631-4 and the fourth electrical substation 631-5, the control device 680 controls the traction substation 611-1 to adjust the voltage so that the second difference between the target power supply voltage of the target power supply section and the second power supply voltage of the second adjacent section is less than the voltage threshold (that is, the voltage difference between the two sides of the second electrical substation 631-4 is less than the voltage threshold), thereby allowing the second train 670-2 to pass through the second transition zone 670 without power interruption; and after the second train 670-2 passes through the second transition zone 670, the control device 680 first controls the second switch 661-1 connected in parallel to the second electrical substation 631-4 in the second transition zone 670 to open, and then controls the second switch 661-2 connected in parallel to the fourth electrical substation 631-5 to close. In some embodiments of this specification, for... Figure 6 The train power supply system 600 shown can achieve flexible and uninterrupted passage of both the first and second trains through the first and second transition zones via the above process 700B.

[0216] Figure 8 This is a schematic diagram of the topology of a train power supply system according to some embodiments of this specification. It should be noted that the following embodiments are for illustrative purposes only and do not constitute a limitation thereof.

[0217] In some embodiments, such as Figure 8 As shown, the first transition zone 850 consists of a first electrical section 831-2, a third electrical section 831-3, two first switches (such as 851-1 and 851-2), two first voltage transformers (such as 852-1 and 852-2), and three first position sensors (such as 853-1, 853-2 and 853-3). Among them, two first switches (such as 851-1 and 851-2) are connected in parallel at both ends of the first electrical section 831-2 and the third electrical section 831-3, respectively; two first voltage transformers (such as 852-1 and 852-2) are respectively located on the first side of the first electrical section 831-2 and the second side of the third electrical section 831-3; and three first position sensors (such as 853-1, 853-2, and 853-3) are respectively located on the first side of the first electrical section 831-2, between the first electrical section 831-2 and the third electrical section 831-3, and on the second side of the third electrical section 831-3.

[0218] For more information on the first transition zone, the first switch, the first voltage transformer, the first position sensor, the first side of the first electrical section, and the second side of the first electrical section, please refer to [link to relevant documentation]. Figure 1A , Figure 1B and Figure 2The relevant descriptions are provided in the Chinese text. For more information on the third electrical segment and its second side, please refer to [link to relevant documentation]. Figure 4 And its related descriptions.

[0219] In some embodiments, such as Figure 8 As shown, the second transition zone 860 consists of a second electrical section 831-5, a fourth electrical section 831-6, two second switches (such as 861-1 and 861-2), two second voltage transformers (such as 862-1 and 862-2), and three second position sensors (such as 863-1, 863-2 and 863-3). Among them, two second switches 861-1 and 861-2 are connected in parallel at both ends of the second electrical section 831-5 and the fourth electrical section 831-6, respectively; two second voltage transformers 862-1 and 862-2 are respectively located on the first side of the second electrical section 831-5 and the second side of the fourth electrical section 831-6; and three second position sensors 863-1, 863-2, and 863-3 are respectively located on the first side of the second electrical section 831-5, between the second electrical section 831-5 and the fourth electrical section 831-6, and on the second side of the fourth electrical section 831-6.

[0220] For more information on the second transition zone, the second switch, the second voltage transformer, the second position sensor, the first side of the second electrical section, and the second side of the second electrical section, please refer to [link to relevant documentation]. Figure 1A , Figure 1B and Figure 2 The corresponding description is provided in the text. For more information on the fourth electrical segment and its second side, please refer to [link / reference needed]. Figure 6 And its related descriptions.

[0221] For more information on control devices, traction substations, electrical sections, power supply voltage, preset conditions, etc., please refer to [link / reference needed]. Figure 1A , Figure 1B and Figure 2 And its related descriptions.

[0222] In some embodiments, for Figure 8 The train power supply system 800 shown can employ different control methods based on whether trains simultaneously arrive at the first and second transition zones, and the initial state. For example, when no trains simultaneously arrive at the first and second transition zones, the control device 880 can use control methods of process 900A or process 900C. When trains simultaneously arrive at the first and second transition zones, the control device 880 can use control methods of process 900B or process 900D.

[0223] Figure 9A This is an exemplary flowchart illustrating the adjustment of the supply voltage according to some embodiments of this specification. Figure 9AAs shown, process 900A may include the following steps. In some embodiments, process 900A may be executed based on a control device.

[0224] In some embodiments, for Figure 8 The train power supply system 800 shown is initially in a state where the first switch of the first transition zone 850 connected in parallel to the first electrical sub-section is open and the first switch of the third electrical sub-section is closed. The second switch of the second transition zone 860 connected in parallel to the second electrical sub-section is closed and the second switch of the fourth electrical sub-section is open. When the first position sensor located on the first side of the first electrical sub-section and the second position sensor located on the first side of the second electrical sub-section detect that no train arrives at the same time, the control device 880 can execute the following steps 910A to 920A.

[0225] Step 910A: If the train reaches the first position sensor located on the first side of the first electrical substation, the control device controls the traction substation to adjust the voltage so that the first difference between the target power supply voltage of the target power supply section and the first power supply voltage of the first adjacent section is less than a voltage threshold. This also ensures that the first difference between the two first voltage transformers is less than the voltage threshold.

[0226] Step 920A: If the train moves from the second position sensor located on the first side of the second electrical substation to the second position sensor located between the second and fourth electrical substations, the control device controls the traction substation to adjust the voltage so that the second difference between the target supply voltage of the target power supply section and the second supply voltage of the second adjacent section is less than a voltage threshold. That is, the second difference between the two second voltage transformers is less than the voltage threshold, thereby allowing the train to pass through the fourth electrical substation and reach the second position sensor located on the second side of the fourth electrical substation.

[0227] More information about the first electrical section, second electrical section, fourth electrical section, control device, traction substation, first voltage transformer, second voltage transformer, and voltage threshold can be found in [link to relevant documentation]. Figure 1A , Figure 1B and Figure 2 Corresponding description.

[0228] Combining the above and Figure 8As an example only, in the initial state, the control device 880 controls the first switch 851-1 connected in parallel with the first electrical segment 831-2 in the first transition zone 850 to open and the first switch 851-2 connected in parallel with the third electrical segment 831-3 to close, and controls the second switch 861-1 connected in parallel with the second electrical segment 831-5 in the second transition zone 860 to close and the second switch 861-2 connected in parallel with the fourth electrical segment 831-6 to open. During train operation, when the first position sensor 853-1 located on the first side of the first electrical substation 831-2 and the second position sensor 863-2 located between the second electrical substation 831-5 and the fourth electrical substation 831-6 detect that no train is arriving simultaneously, and the first position sensor 853-1 on the first side of the first electrical substation 831-2 detects the arrival of train 870-1, the control device 880 can control the traction substation 811-1 to adjust the power supply voltage so that the first difference between the first voltage transformer 852-1 and the first voltage transformer 852-2 is less than the voltage threshold. When the first position sensor 853-2 between the first electrical substation 831-2 and the third electrical substation 831-3 detects the arrival of a train, it can be considered that train 870-1 has left the first transition zone 850. When the first position sensor 853-1 located on the first side of the first electrical section 831-2 and the second position sensor 863-2 located between the second electrical section 831-5 and the fourth electrical section 831-6 detect that no train has arrived at the same time, if the train 870-2 arrives at the second position sensor 863-2 located between the second electrical section 831-5 and the fourth electrical section 831-6, the control device 880 can control the traction substation 811-1 to adjust the power supply voltage so that the second difference between the second voltage transformer 862-1 and the second voltage transformer 862-2 is less than the voltage threshold, so that the train 870-2 passes through the fourth electrical section 831-6 and arrives at the second position sensor 863-3 located on the second side of the fourth electrical section 831-6. When the second position sensor 863-3 on the second side of the fourth electrical section 831-6 detects the arrival of a train, it can be considered that train 870-2 has left the second transition zone 860, completing the train's journey from the first adjacent section to the second adjacent section.

[0229] For more information on the control device regulating the voltage of the traction substation, please refer to [link to relevant documentation]. Figure 1A , Figure 1B and Figure 2 Related explanations.

[0230] In some embodiments of this specification, when the train reaches the first position sensor located on the first side of the first electrical section, the traction substation 811-1 is controlled by a control device to adjust the voltage so that the first difference between the two first voltage transformers is less than a voltage threshold. This allows the train to smoothly pass through the first transition zone without switching the opening and closing states of the first and second switches. Similarly, when the train reaches the second position sensor located between the second and fourth electrical sections, the traction substation 811-1 is controlled by a control device to adjust the voltage so that the second difference between the two second voltage transformers is less than a voltage threshold. This allows the train to smoothly pass through the second transition zone without switching the opening and closing states of the first and second switches. Through this method, the train can flexibly and continuously pass through the first or second transition zone.

[0231] Figure 9B This is an exemplary flowchart illustrating the adjustment of the supply voltage according to some embodiments of this specification. Figure 9B As shown, process 900B may include the following steps. In some embodiments, process 900B may be executed based on control device 880.

[0232] In some embodiments, for Figure 8 The train power supply system 800 shown initially operates as follows: when the first switch of the first transition zone 850 connected in parallel to the first electrical sub-section is open and the first switch of the third electrical sub-section is closed, and the second switch of the second transition zone 860 connected in parallel to the second electrical sub-section is closed and the second switch of the fourth electrical sub-section is open, and when the first position sensor located on the first side of the first electrical sub-section and the second position sensor located between the second and fourth electrical sub-sections detect the simultaneous arrival of a train, the control device 880 can execute the following steps 910B to 940B.

[0233] Step 910B: Using a control device, first control the first switch of the first transition zone connected in parallel with the third electrical segment to open, and then control the first switch of the first transition zone connected in parallel with the first electrical segment to close.

[0234] Step 920B: While controlling the first switch, the control device controls the traction substation to adjust the voltage so that the voltage difference across the fourth electrical section of the second transition zone is less than a voltage threshold. At this time, the first train, located in the first transition zone at the first position sensor located on the first side of the first electrical section, passes through the first electrical section of the first transition zone and reaches the first position sensor located between the first and third electrical sections. Simultaneously, the second train, located in the second transition zone between the second and fourth electrical sections, passes through the fourth electrical section of the second transition zone and reaches the second position sensor.

[0235] Step 930B: When the first position sensor located between the first and third electrical sections detects the arrival of the first train, the control device controls the traction substation to adjust the voltage so that the voltage difference between the two ends of the third electrical section in the first transition zone is less than the voltage threshold, thereby allowing the first train to pass through the third electrical section and reach the first position sensor located on the second side of the third electrical section.

[0236] Step 940B, further, the control device first controls the first switch in the first transition zone connected in parallel to the first electrical segment to open, and then controls the first switch in the third electrical segment to close.

[0237] For more information on the control device's regulation of the traction substation voltage in process 900B, please refer to [link to relevant documentation]. Figure 1A , Figure 1B and Figure 2 Related explanations.

[0238] Combining the above and Figure 8As an example only, in the initial state, the control device 880 controls the first switch 851-1 connected in parallel to the first electrical sub-section 831-2 in the first transition zone 850 to open and the first switch 851-2 connected in parallel to the third electrical sub-section 831-3 to close. It also controls the second switch 861-1 connected in parallel to the second electrical sub-section 831-5 in the second transition zone to close and the second switch 861-2 connected in parallel to the fourth electrical sub-section 831-6 to open. During train operation, when the first position sensor 853-1 located on the first side of the first electrical sub-section 831-2 and the second position sensor 863-2 located between the second electrical sub-section 831-5 and the fourth electrical sub-section 831-6 detect the simultaneous arrival of a train, the control device 880 can first control the first switch 851-2 connected in parallel to the third electrical sub-section 831-3 in the first transition zone 850 to open, and then control the first switch 851-1 connected in parallel to the first electrical sub-section 831-2 to close. While controlling the first switch 851-1 or 851-2, the control device 880 controls the traction substation 811-1 to adjust the voltage so that the voltage difference across the fourth electrical section 831-6 of the second transition zone 860 is less than the voltage threshold. At this time, the first train located at the first position sensor 853-1 on the first side of the first electrical section 831-2 in the first transition zone reaches the first position sensor 853-2 located between the first electrical section 831-2 and the third electrical section 831-3 through the first electrical section 831-2 in the first transition zone; at the same time, the second train located between the second electrical section 831-5 and the fourth electrical section 831-6 in the second transition zone reaches the second position sensor 863-2 through the fourth electrical section 831-6 in the second transition zone 860. Subsequently, control device 880 controls traction substation 811-1 to adjust the voltage so that the voltage difference across the third electrical section 831-3 of the first transition zone 850 is less than the voltage threshold. The first train 870-1 then passes through the third electrical section 831-3 and reaches the first position sensor 853-3 located on the second side of the third electrical section 831-3. When the first position sensor 853-3 located on the second side of the third electrical section 831-3 detects the arrival of the first train 870-1, it can be considered that the first train 870-1 has passed through the first transition zone 850 and the second train 870-2 has passed through the second transition zone 860. Further, control device 880 first controls the first switch 851-1 connected in parallel to the first electrical section 831-2 in the first transition zone 850 to open, and then controls the first switch 851-2 connected in parallel to the third electrical section 831-3 to close. The steps are as follows: the first train 870-1 leaves the first transition zone 850 and the second train 870-2 leaves the second transition zone 860.

[0239] In some embodiments of this specification, for Figure 8The train power supply system 800 shown can achieve flexible and uninterrupted passage of both the first and second trains through the first and second transition zones via the above process 900B.

[0240] Figure 9C This is an exemplary flowchart illustrating the adjustment of the supply voltage according to some embodiments of this specification. Figure 9C As shown, process 900C may include the following steps. In some embodiments, process 900C may be executed based on control device 880.

[0241] In some embodiments, for Figure 8 The train power supply system 800 shown can initially be configured such that the first switch of the first transition zone 850 connected in parallel to the first electrical sub-section is closed, and the first switch of the third electrical sub-section is open; the second switch of the second transition zone 860 connected in parallel to the second electrical sub-section is open, and the second switch of the fourth electrical sub-section is closed; and when the first position sensor located on the first side of the first electrical sub-section and the second position sensor located on the first side of the second electrical sub-section detect that no train has arrived simultaneously, the control device 880 can adopt the control method of process 900C. Process 900C executes the following steps 910C to 920C.

[0242] In step 910C, since the first switch connected in parallel to the first electrical sub-section of the first transition zone is closed, the train passes through the first electrical sub-section and arrives at the first position sensor located between the first electrical sub-section and the third electrical sub-section. At this time, the traction substation adjusts the voltage through the control device so that the voltage difference between the two ends of the third electrical sub-section is less than the voltage threshold, thereby allowing the train to pass through the first transition zone.

[0243] Step 920C: If the train reaches the second position sensor located on the first side of the second electrical substation, the control device controls the traction substation to adjust the voltage so that the voltage difference across the second electrical substation is less than a voltage threshold. The train then passes through the second electrical substation and reaches the second position sensor located between the second and fourth electrical substations. At this time, because the second switch connected in parallel to the fourth electrical substation is closed, the train passes through the fourth electrical substation and reaches the second position sensor located on the second side of the fourth electrical substation.

[0244] Combining the above and Figure 8 , Figure 9CAs an example only, in the initial state, the control device 880 can control the first switch 851-1 of the first transition zone 850 connected in parallel to the first electrical section 831-2 to close, and the first switch 851-2 of the first electrical section 831-3 connected in parallel to open; it can also control the second switch 861-1 of the second transition zone 860 connected in parallel to the second electrical section 831-5 to open, and the second switch 861-2 of the second switch connected in parallel to the fourth electrical section 831-6 to close. During train operation, when the train reaches the first position sensor 853-1 on the first side of the first electrical section 831-2, because the first switch 851-1 of the first transition zone 850 connected in parallel to the first electrical section 831-2 is closed, the train can smoothly pass through the first electrical section 831-2 and reach the first position sensor 853-2 located between the first electrical section 831-2 and the third electrical section 831-3. At this time, the control device 880 controls the traction substation 811-1 to adjust the voltage so that the voltage difference between the two ends of the third electrical section 831-3 is less than the voltage threshold. As a result, the train passes through the third electrical section 831-3 and reaches the first position sensor 853-3 located on the second side of the third electrical section 831-3. The train then leaves the first transition zone 850. If the train reaches the second position sensor 863-1 located on the first side of the second electrical substation 831-5, the control device 880 controls the traction substation 811-1 to adjust the voltage so that the voltage difference across the second electrical substation 831-5 is less than the voltage threshold. Thus, the train passes from the second position sensor 863-1 on the first side of the second electrical substation 831-5 to the second position sensor 863-2 located between the second electrical substation 831-5 and the fourth electrical substation 831-6. At this time, since the second switch 861-2 connected in parallel to the fourth electrical substation 831-6 is closed, the train continues through the fourth electrical substation 831-6 to the second position sensor 863-3 located on the second side of the fourth electrical substation 831-6, and the train exits the second transition zone 860.

[0245] For more information on the control device's control of the voltage regulation in traction substation 8, please refer to [link / reference needed]. Figure 1A , Figure 1B and Figure 2 Related explanations.

[0246] In some embodiments of this specification, when the train reaches the first position sensor located between the first and third electrical substations, the traction substation 811-1 is controlled by a control device to adjust the voltage so that the first difference between the two first voltage transformers is less than a voltage threshold. This allows the train to smoothly pass through the first transition zone without switching the opening and closing states of the first and second switches. Similarly, when the train reaches the second position sensor located on the first side of the second electrical substation, the traction substation 811-1 is controlled by a control device to adjust the voltage so that the second difference between the two second voltage transformers is less than a voltage threshold. This allows the train to smoothly pass through the second transition zone without switching the opening and closing states of the first and second switches. Through this method, the train can flexibly and continuously pass through the first or second transition zone.

[0247] Figure 9D This is an exemplary flowchart illustrating the adjustment of the supply voltage according to some embodiments of this specification. Figure 9D As shown, process 900D may include the following steps. In some embodiments, process 900D may be executed based on control device 880.

[0248] In some embodiments, for Figure 8 The train power supply system 800 shown is initially in a state where the first switch in the first transition zone 850 connected in parallel to the first electrical sub-section is closed and the first switch in the third electrical sub-section is open; the second switch in the second transition zone 860 connected in parallel to the second electrical sub-section is open and the second switch in the fourth electrical sub-section is closed. When the first position sensor located on the first side of the third electrical sub-section and the second position sensor located on the first side of the second electrical sub-section detect that a train has arrived at the same time, the control device 880 can execute the following steps 910D to 940D.

[0249] In step 910D, the control device first controls the second switch connected in parallel to the fourth electrical sub-section in the second transition zone to open, and then controls the second switch connected in parallel to the second electrical sub-section to close. At this time, the second train located at the second position sensor on the first side of the second electrical sub-section passes through the second electrical sub-section of the second transition zone and arrives at the second position sensor located between the second electrical sub-section and the fourth electrical sub-section.

[0250] In step 920D, while controlling the second switch, the control device controls the traction substation to adjust the voltage so that the voltage difference across the third electrical section of the first transition zone is less than the voltage threshold. At this time, the first train, located at the first position sensor on the first side of the third electrical section, passes through the third electrical section to reach the first position sensor on the second side of the third electrical section. Simultaneously, the second train, located at the second position sensor on the first side of the second electrical section, passes through the second electrical section of the second transition zone to reach the second position sensor located between the second and fourth electrical sections.

[0251] Step 930D: When the second position sensor located between the second and fourth electrical sections detects the arrival of the second train, the control device controls the traction substation to adjust the voltage so that the voltage difference between the two ends of the fourth electrical section in the second transition zone is less than the voltage threshold, thereby allowing the second train to pass through the fourth electrical section and reach the second position sensor located on the second side of the fourth electrical section.

[0252] Step 940D: Through the control device, first control the second switch connected in parallel to the second electrical section in the second transition zone to open, and then control the second switch connected in parallel to the fourth electrical section to close.

[0253] For more information on how the control device in Process 900D controls the voltage regulation of the traction substation, please refer to [link to relevant documentation]. Figure 1A , Figure 1B and Figure 2 Related explanations.

[0254] In conjunction with the above text Figure 8 and 9DAs an example only, in the initial state, the control device 880 can control the first switch 851-1 connected in parallel to the first electrical sub-section 831-2 in the first transition zone 850 to close and the first switch 851-2 connected in parallel to the third electrical sub-section 831-3 to open, and control the second switch 861-1 connected in parallel to the second electrical sub-section 831-5 in the second transition zone 860 to open and the second switch 861-2 connected in parallel to the fourth electrical sub-section 831-6 to close. During train operation, when the first position sensor 853-2 located on the first side of the third electrical sub-section 831-3 and the second position sensor 863-1 located on the first side of the second electrical sub-section 831-5 detect the simultaneous arrival of a train, the control device 880 can first control the second switch 861-2 connected in parallel to the fourth electrical sub-section 831-6 in the second transition zone to open, and then control the second switch 861-1 connected in parallel to the second electrical sub-section 831-5 to close. Simultaneously, the control device 880 controls the traction substation 811-1 to adjust the voltage so that the voltage difference across the third electrical section 831-3 of the first transition zone 850 is less than the voltage threshold. At this time, the first train located at the first position sensor 853-2 on the first side of the third electrical section 831-3 in the first transition zone 850 passes through the third electrical section 831-3 in the first transition zone 850 and arrives at the first position sensor 853-3 on the second side of the third electrical section 831-3; at the same time, the second train 870-2 located at the second position sensor 863-1 on the first side of the second electrical section 831-5 in the second transition zone 860 passes through the second electrical section 831-5 in the second transition zone and arrives at the second position sensor 863-2 located between the second electrical section 831-5 and the fourth electrical section 831-6. Subsequently, control device 880 controls traction substation 811-1 to adjust the voltage so that the voltage difference across the fourth electrical section 831-6 of the second transition zone 860 is less than the voltage threshold. The first train 870-1 passes through the third electrical section 831-3 and reaches the first position sensor 853-3 located on the second side of the third electrical section 831-3; the second train 870-2 passes through the fourth electrical section 831-6 and reaches the second position sensor 863-3 located on the second side of the fourth electrical section 831-6. At this time, when the second position sensor 863-3 located on the second side of the fourth electrical section 831-6 detects the arrival of the second train 870-2, it can be considered that the first train 870-1 has passed through the first transition zone 850 and the second train 870-2 has passed through the second transition zone 860. The control device 880 first controls the second switch 861-1, which is connected in parallel to the second electrical section 831-5 in the second transition zone 860, to open, and then controls the second switch 861-2, which is connected in parallel to the fourth electrical section 831-6, to close, thereby restoring the initial state corresponding to process 1000B. This completes the steps of the first train 870-1 leaving the first transition zone 850 and the second train 870-2 leaving the second transition zone 860.

[0255] In some embodiments of this specification, for Figure 8 The train power supply system shown can achieve flexible and uninterrupted passage of both the first and second trains through the first and second transition zones via the above process 900D.

[0256] Figure 10 This is an exemplary schematic diagram of another train power supply system according to some embodiments of this specification.

[0257] like Figure 10 As shown, in some embodiments, the train power supply system 1000 may include a second traction substation 1020 and a third traction substation 1030 in addition to the first traction substation 1010. In this embodiment, the first traction substation 1010 includes a first adjustable voltage output terminal 1011, a second adjustable voltage output terminal 1012, and a third adjustable voltage output terminal 1013, which are respectively connected to the first adjustable power supply section 1041, the second adjustable power supply section 1042, and the third adjustable power supply section 1043. The first adjustable power supply section 1041 and the third adjacent section 1071 are connected through a first transition zone 1050, and the third adjacent section 1071 is powered by the second traction substation 1020; the third adjustable power supply section 1043 and the fourth adjacent section 1072 are connected through a second transition zone 1060, and the fourth adjacent section 1072 is powered by the third traction substation 1030. It can be understood that in this embodiment, the contact network includes the third adjacent section, the first transition zone, the first adjustable power supply section, the third electrical branch section, the second adjustable power supply section, the fourth electrical branch section, the third adjustable power supply section, the second transition zone, and the fourth adjacent section connected in sequence; the first adjustable power supply section and the third adjacent section are connected through the first transition zone, the first adjustable power supply section and the second adjustable power supply section are connected through the third electrical branch section, and the second adjustable power supply section and the third adjustable power supply section are connected through the fourth electrical branch section; the third adjustable power supply section and the fourth adjacent section are connected through the second transition zone; the transition zone includes the first transition zone and the second transition zone.

[0258] Adjustable voltage output terminals (e.g., first adjustable voltage output terminal 1011, second adjustable voltage output terminal 1012, and third adjustable voltage output segment 1013) are power output ports of traction substations (e.g., first traction substation 1010), which can be used to output power to the contact network power supply segments connected thereto (e.g., first adjustable power supply segment 1041, second adjustable power supply segment 1042, and third adjustable power supply segment 1043) and regulate the supply voltage of the power supply segments. For example, the first traction substation 1010 can output adjustable voltage from the adjustable voltage output terminals through a transformer, converter (e.g., voltage regulating converter), or electronic controller to regulate the supply voltage (e.g., voltage amplitude and / or phase) of the power supply segments.

[0259] An adjustable power supply section refers to a power supply section on the contact wire whose power supply voltage can be adjusted. For example, the first adjustable power supply section 1041, the second adjustable power supply section 1042, and the third adjustable power supply section 1043 are respectively connected to the first adjustable voltage output terminal 1011, the second adjustable voltage output terminal 1012, and the third adjustable voltage output terminal 1013.

[0260] In this embodiment, the adjacent section refers to a power supply section that is adjacent to the power supply section of the traction substation and is powered by other traction substations (e.g., the second traction substation 1020 and the third traction substation 1030).

[0261] In some embodiments, such as Figure 10 As shown, the train power supply system 1000 may include a third adjacent section 1071 and a fourth adjacent section 1072. The third adjacent section refers to the power supply section in the second traction substation 1020 adjacent to the first adjustable power supply section 1041, and the third adjacent section 1071 is powered by the second traction substation 1020. The fourth adjacent section refers to the power supply section in the second traction substation 1030 adjacent to the third adjustable power supply section 1043, and the fourth adjacent section 1072 is powered by the third traction substation 1030.

[0262] In this embodiment, the first transition zone 1050 refers to the transition zone between the third adjacent section 1071 of the second traction substation 1020 and the first adjustable power supply section 1041. The second transition zone 1060 refers to the transition zone between the third adjacent section 1072 of the third traction substation 1030 and the third adjustable power supply section 1043. For more information on transition zones, please refer to [link to relevant documentation]. Figure 1A , Figure 1B And its related descriptions.

[0263] In some embodiments, such as Figure 10As shown, the first transition zone 1050 includes a first electrical section 1051 and a first sectionalizing switch 1052 connected in parallel on both sides of the first electrical section 1051, and the second transition zone 1060 includes a second electrical section 1061 and a second sectionalizing switch 1062 connected in parallel on both sides of the second electrical section 1061.

[0264] In some embodiments, power supply sections can be connected by a transition zone to ensure that the train can smoothly transition from one power supply section to another during operation without interrupting power supply.

[0265] The electrical disconnect section is an indispensable component of the transition zone and forms its foundation. As mentioned above, the electrical disconnect section refers to a device used to electrically isolate two sections of contact wire with different voltage amplitudes or phases, preventing the contact wires from being connected when a train's pantograph passes by. More information about electrical disconnect sections can be found in [link to relevant documentation]. Figure 1A , Figure 1B And its related descriptions.

[0266] Understandable, such as Figure 10 As shown, when the first sectionalizing switch 1052 or the second sectionalizing switch 1062 is open, the circuit between the power supply section of the second traction substation 1020 or the third traction substation 1030 and the power supply section of the first traction substation 1010 is disconnected. When the first sectionalizing switch 1052 or the second sectionalizing switch 1062 is closed, the circuit between the power supply section of the second traction substation 1020 or the third traction substation 1030 and the power supply section of the first traction substation 1010 is closed.

[0267] In some embodiments of this specification, by providing a first adjustable voltage output terminal, a second adjustable voltage output terminal, and a third adjustable voltage output terminal to the train power supply system 1000 for adjusting the power supply voltage of the first adjustable power supply section, the second adjustable power supply section, and the third adjustable power supply section, the voltage of the traction substation is flexibly adjustable, providing hardware conditions for the train to smoothly pass through the transition zone.

[0268] In some embodiments, when the train approaches the first transition zone 1050 or the second transition zone 1060, the first traction substation 1010 can be controlled by a control device (e.g., control device 140) to adjust the power supply voltage of the first adjustable power supply section 1041 or the third adjustable power supply section 1043, so that the third difference between the power supply voltages on both sides of the first transition zone 1050 is less than a voltage threshold or the fourth difference between the power supply voltages on both sides of the second transition zone 1060 is less than a voltage threshold.

[0269] Approaching the first or second transition zone refers to the process of a train traveling from the previous power supply section to the first or second transition zone. For example, approaching the first transition zone can be when a train travels from the third adjacent section 1071 to the first transition zone 1050 with the train head being less than a preset distance from the first transition zone 1050; or approaching the second transition zone can be when a train travels from the third adjustable power supply section 1043 to the second transition zone 1060 with the train head being less than a preset distance from the second transition zone 1060.

[0270] The third difference refers to the difference between the supply voltages on both sides of the first transition zone 1050. For example, the voltage difference, current difference, phase difference, amplitude difference, and frequency difference of the electrical signals on both sides of the first transition zone 1050.

[0271] The fourth difference refers to the difference between the supply voltages on both sides of the second transition zone 1060. For example, the voltage difference, current difference, phase difference, amplitude difference, and frequency difference of the electrical signal on both sides of the second transition zone 1060.

[0272] In some embodiments, the control device (not shown) can adjust the supply voltage of the first adjustable power supply segment 1041 through the first adjustable voltage output terminal 1011 according to the supply voltage of the third adjacent segment 1071, so that the third difference between the supply voltages on both sides of the first transition region 1050 is less than the voltage threshold. For example, the control device 140 can calculate the target supply voltage of the first adjustable power supply segment that makes the third difference less than the voltage threshold according to the supply voltage of the third adjacent segment 1071, and send a command through the control device to adjust the output voltage of the first adjustable voltage output terminal 1011 to the target supply voltage, so that the supply voltage of the first adjustable power supply segment 1041 is adjusted to the target supply voltage, and the third difference between the supply voltages on both sides of the first transition region 1050 is less than the voltage threshold. As an example only, when the supply voltage of the third adjacent segment 1071 is 25000V and the voltage threshold is 25V, the control device can calculate that when the supply voltage of the first adjustable power supply segment 1041 is between 24975V and 25025V, the third difference between the supply voltages at both ends of the first transition zone 1050 can be less than the voltage threshold. Then the control device can send a command to adjust the voltage output by the first adjustable voltage output terminal 1011 to any value between 24975V and 25025V (such as 25000V), so that the third difference between the supply voltages on both sides of the first transition zone 1050 is less than the voltage threshold. For example, the control device can first compare the supply voltage of the first adjustable power supply segment 1041 with the supply voltage of the third adjacent segment 1071, adjust the supply voltage of the first adjustable power supply segment 1041 towards the supply voltage of the third adjacent segment according to the magnitude relationship, and calculate the third difference in real time. When the third difference is less than the voltage threshold, the adjustment of the supply voltage (such as the output voltage) of the first adjustable power supply segment 1041 is stopped.

[0273] In some embodiments, the control device may further adjust the supply voltage of the third adjustable power supply section 1043 according to the method described above, such that the fourth difference between the supply voltages on both sides of the second transition region 1060 is less than the voltage threshold. For further explanation of the voltage threshold, see [link to relevant documentation]. Figure 1A , Figure 1B And its related descriptions.

[0274] In some embodiments of this specification, when the train approaches the first transition zone 1050 or the second transition zone 1060, the power supply voltage of the first adjustable power supply section or the third adjustable power supply section can be adjusted by the control device, which can enable the train to switch stably between adjacent traction substations and improve the smoothness and safety of train operation.

[0275] Figure 11 This is another exemplary flowchart of a control method for a train power supply system according to some embodiments of this specification. Figure 11 To and Figure 10The diagram shows the flow of the train power supply system 1000. In some embodiments, flow 1100 may be executed by a control device (e.g., control device 140).

[0276] Step 1110: When the train approaches the second adjustable power supply section from the first adjustable power supply section, the traction substation is controlled by the control device to adjust the power supply voltage of the second adjustable power supply section so that the fifth difference between the power supply voltage of the second adjustable power supply section and the first adjustable power supply section is less than the voltage threshold.

[0277] The train moving from the first adjustable power supply section to the second adjustable power supply section refers to the process of the train traveling from the first adjustable power supply section to the second adjustable power supply section.

[0278] The fifth difference refers to the difference between the supply voltage of the second adjustable power supply section and the first adjustable power supply section, such as at least one of voltage difference, current difference, phase difference, amplitude difference, and frequency difference of electrical signals.

[0279] In some embodiments, the control device can adjust the supply voltage of the second adjustable power supply segment 1042 based on the second adjustable voltage output terminal 1012, so that the fifth difference is less than the voltage threshold. For example, the control device can directly issue a command based on the supply voltage of the first adjustable power supply segment 1041 to control the supply voltage output by the second adjustable voltage output terminal 1012, so that the supply voltage of the second adjustable power supply segment 1042 is consistent with the supply voltage of the first adjustable power supply segment 1041, thereby making the fifth difference less than the voltage threshold.

[0280] Step 1120: When the train approaches the third adjustable power supply section from the second adjustable power supply section, the traction substation is controlled by the control device to adjust the power supply voltage of the second adjustable power supply section so that the sixth difference between the power supply voltage of the second adjustable power supply section and the third adjustable power supply section is less than the voltage threshold.

[0281] The train moving from the second adjustable power supply section to the third adjustable power supply section refers to the process of the train traveling from the second adjustable power supply section to the third adjustable power supply section.

[0282] The sixth difference refers to the difference between the supply voltage of the second adjustable power supply section and the third adjustable power supply section. For example, it can be at least one of the following: voltage difference, current difference, phase difference, amplitude difference, and frequency difference of an electrical signal.

[0283] In some embodiments, the control device can adjust the supply voltage of the second adjustable power supply segment 1042 through the second adjustable voltage output terminal 1012, so that the sixth difference is less than the voltage threshold. For example, the control device can directly issue a command based on the supply voltage of the third adjustable power supply segment 1043 to control the supply voltage output by the second adjustable voltage output terminal 1012, so that the supply voltage of the second adjustable power supply segment 1042 is consistent with the supply voltage of the third adjustable power supply segment 1043, thereby making the sixth difference less than the voltage threshold. As another example, the control device can also adjust the supply voltage of the second adjustable power supply segment 1042 in the same way as adjusting the supply voltage of the first adjustable power supply segment 1041, as detailed in [link to relevant documentation]. Figure 10 And its related descriptions.

[0284] In some embodiments of this specification, when the train approaches the second or third adjustable power supply section, the control device adjusts the second adjustable power supply section so that its power supply voltage is consistent with that of the first or third adjustable power supply section, respectively. This ensures the stability of the power supply when the train passes through different power supply sections, makes the switching between adjacent power supply sections smoother, and avoids train operation failures and safety risks caused by power supply fluctuations.

[0285] In some embodiments, in response to a third difference between the supply voltages on both sides of the first transition region 1050 being less than the voltage threshold, the first segmented switch 1052 is closed by a control device.

[0286] In some embodiments, in response to a fourth difference between the supply voltages on both sides of the second transition region 1060 being less than the voltage threshold, the control device controls the closing of the second segment switch 1062.

[0287] In some embodiments, when the third difference is less than the voltage threshold, it indicates that the difference in power supply voltage (such as the difference in voltage phase) on both sides of the first transition zone 1050 meets a preset condition. The control device can then control the first segment switch 1052 to close, making the power supply voltage between the third adjacent segment 1071 and the first adjustable power supply segment 1041 completely identical. When the fourth difference is less than the voltage threshold, it indicates that the difference in power supply voltage (such as the difference in voltage phase) on both sides of the second transition zone 1060 meets a preset condition. The control device can then control the second segment switch 1062 to close, making the power supply voltage between the fourth adjacent segment 1072 and the third adjustable power supply segment 1043 completely identical. This allows the train to smoothly switch to different power supply segments.

[0288] In some embodiments of this specification, by controlling the first sectionalizing switch to close when the third difference is less than the voltage threshold and controlling the second sectionalizing switch to close when the fourth difference is less than the voltage threshold, a path is formed between adjacent traction substations, thereby making the voltage on both sides of the first or second sectionalizing switch the same, so that the train can seamlessly pass through two different traction substations, improving the stability and safety of train operation.

[0289] Figure 12 This is an exemplary schematic diagram of another train power supply system according to some embodiments of this specification.

[0290] like Figure 12 As shown, in some embodiments, the train power supply system 1200 includes a first traction substation 1210, a second traction substation 1220, a third traction substation 1230, a first adjustable power supply section 1241, a second adjustable power supply section 1242, a third adjustable power supply section 1243, a first control switch 1251, a second control switch 1252, a third control switch 1253, a third electrical substation 1261, a fourth electrical substation 1262, a first transition zone 1270, and a second transition zone 1280. The first traction substation 1210, the second traction substation 1220, the third traction substation 1230, the first adjustable power supply section 1241, the second adjustable power supply section 1242, and the third adjustable power supply section 1243 are respectively connected to… Figure 10 The first traction substation 1010, the second traction substation 1020, the third traction substation 1030, the first adjustable power supply section 1041, the second adjustable power supply section 1042, and the third adjustable power supply section 1043 have similar structures. For more details, please refer to [link to relevant documentation]. Figure 10 And its related descriptions.

[0291] The first traction substation 1210 includes a first voltage regulating converter 1211, a second voltage regulating converter 1212, and a third voltage regulating converter 1213. The first voltage regulating converter 1211 is connected to the first adjustable power supply section 1241 through a first control switch 1251, the second voltage regulating converter 1212 is connected to the second adjustable power supply section 1242 through a second control switch 1252, and the third voltage regulating converter 1213 is connected to the third adjustable power supply section 1243 through a third control switch 1253. Understandably, in this embodiment, the first adjustable voltage output terminal, the second adjustable voltage output terminal, and the third adjustable voltage output terminal are the output ports of the first voltage regulating converter 1211, the second voltage regulating converter 1212, and the third voltage regulating converter 1213, respectively. The first adjustable power supply section 1241 and the second adjustable power supply section 1242 are connected through the third electrical branch section 1261, and the second adjustable power supply section 1242 and the third adjustable power supply section 1243 are connected through the fourth electrical branch section 1262.

[0292] In some embodiments, the voltage regulating converter may include a voltage regulating converter and a voltage regulating transformer, and the supply voltage of the traction substation can be adjusted by the voltage regulating converter and the voltage regulating transformer. In some embodiments, the voltage regulating converter can be used to flexibly adjust the supply voltage of the power supply section so that the supply voltage of the train is stable when passing through different power supply sections. In some embodiments, the voltage regulating converter can adjust the phase and amplitude of the voltage.

[0293] A control switch is a switch that controls the open or closed state of a circuit.

[0294] In some embodiments, the control switches can control the opening and closing of the circuit between the voltage regulating converter and the adjustable power supply section. For example, the first control switch 1251, the second control switch 1252, and the third control switch 1253 are respectively used to control the opening and closing of the circuit between the first voltage regulating converter 1211 and the first adjustable power supply section 1241, the second voltage regulating converter 1212 and the second adjustable power supply section 1242, and the third voltage regulating converter 1213 and the third adjustable power supply section 1243.

[0295] It is understandable that when the first control switch 1251, the second control switch 1252, or the third control switch 1253 is open, the first adjustable power supply section 1041, the second adjustable power supply section 1042, or the third adjustable power supply section 1043 stops supplying power, which can save energy or be used for maintenance during non-train operation periods. When the first control switch 1251, the second control switch 1252, or the third control switch 1253 is closed, the train power supply system can supply power to the moving train.

[0296] The third electrical segment 1261 refers to the segment used to divide the first adjustable power supply segment 1241 and the second adjustable power supply segment 1242.

[0297] The fourth electrical section 1262 refers to the section used to divide the second adjustable power supply section 1242 and the third adjustable power supply section 1243.

[0298] In some embodiments, the third electrical section 1261 and the fourth electrical section 1262 are used to divide different adjustable power supply sections, so that the traction substation can flexibly adjust the power supply voltage.

[0299] The first transition zone 1270 includes a first electrical section 1271 and a first sectionalizing switch 1272 connected in parallel across the first electrical section 1271. The second transition zone 1280 includes a second electrical section 1281 and a second sectionalizing switch 1282 connected in parallel across the second electrical section 1281. The first transition zone 1270, the first electrical section 1271, the first sectionalizing switch 1272, the second transition zone 1280, the second electrical section 1281, and the second sectionalizing switch 1282 are respectively connected to... Figure 10The first transition zone 1050, the first electrical section 1051, the first sectionalizing switch 1052, the second transition zone 1060, the second electrical section 1061, and the second sectionalizing switch 1062 have similar structures, and will not be described in detail here.

[0300] In some embodiments of this specification, by setting up multiple voltage regulating converters, control switches, adjustable power supply sections, and electrical sub-sections, the train can adjust the power supply voltage according to the power supply voltage of the traction substations on both sides, thereby ensuring the power supply performance of the train power supply system.

[0301] Figure 13A This is another exemplary flowchart of a control method for a train power supply system according to some embodiments of this specification. Figure 13A To and Figure 12 The diagram shows the flow of the train power supply system 1200. In some embodiments, flow 1300A may be executed by a control device (e.g., control device 140).

[0302] Step 1310A: In the initial state, control the first control switch and the third control switch to be in the closed state.

[0303] The initial state refers to the state of each component of the train power supply system when it is installed or when no train is passing by. For example, the initial state may include the first control switch 1251, the second control switch 1252, and the third control switch 1253 all being in the open state, and the first voltage regulating converter 1211, the second voltage regulating converter 1212, and the third voltage regulating converter 1213 all being in the non-operating state.

[0304] In some embodiments, in the initial state, the control device can control the first control switch 1251 to be closed, so that the circuit between the first adjustable power supply section 1241 and the first voltage regulating converter 1211 is connected, so that the first voltage regulating converter 1211 can supply power to the first adjustable power supply section 1241 and regulate the power supply voltage of the first adjustable power supply section 1241.

[0305] Step 1320A: Control the first voltage regulating converter to work, so as to adjust the voltage of the first adjustable power supply section to be consistent with the voltage of the third adjacent section, and control the first sectional switch to close.

[0306] Voltage consistency means that the voltage parameters are the same. For example, at least one of the voltage parameters such as phase, frequency, and amplitude is the same.

[0307] In some embodiments, the control device may turn on the switch of the first voltage regulating converter 1211, so that the first voltage regulating converter 1211 starts to work.

[0308] In some embodiments, the control device can set the operating parameters of the first voltage regulating converter 1211 according to the voltage of the third adjacent section (e.g., the adjacent power supply section to the left of the first transition zone 1270), so that the first voltage regulating converter 1211 outputs the same voltage as the third adjacent section, thereby adjusting the voltage of the first adjustable power supply section 1241 to be consistent with the voltage of the third adjacent section. In some embodiments, the control device can control the first sectionalizing switch 1272 to close, so that the third adjacent section and the first adjustable power supply section 1241 form a path. By adjusting the voltage of the first adjustable power supply section 1241 to be consistent with the voltage of the third adjacent section and controlling the first sectionalizing switch 1272 to close, the train can flexibly pass through the first transition zone 1270 without interrupting power.

[0309] Step 1330A: Control the third voltage regulating converter to work, so as to adjust the voltage of the third adjustable power supply section to be consistent with the voltage of the fourth adjacent section, and control the second segment switch to close.

[0310] In some embodiments, the control device can start the third voltage regulating converter 1213 to work by turning on the switch of the third voltage regulating converter 1213, and at the same time control the third control switch 1253 to close, so that the third voltage regulating converter 1213 supplies power to the third power supply section.

[0311] In some embodiments, the control device can set the operating parameters of the third voltage regulating converter 1213 according to the voltage of the fourth adjacent section (e.g., the adjacent power supply section to the right of the second transition zone 1280), so that the third voltage regulating converter 1213 outputs the same voltage as the fourth adjacent section, thereby adjusting the voltage of the third adjustable power supply section 1243 to be consistent with the voltage of the fourth adjacent section. In some embodiments, the control device can control the second sectionalizing switch 1282 to close, so that the fourth adjacent section and the third adjustable power supply section 1243 form a path. By controlling the voltage of the third adjustable power supply section 1243 to be consistent with the voltage of the fourth adjacent section and controlling the second sectionalizing switch 1282 to close, the train can flexibly pass through the second transition zone 1280 without interrupting power.

[0312] In some embodiments of this specification, by adjusting and controlling the operation of the first and third voltage regulating converters in the initial state, the voltage of the first adjustable power supply section is made consistent with that of the third adjacent section, and the voltage of the third adjustable power supply section is made consistent with that of the fourth adjacent section. At the same time, the first and second sectionalizing switches are controlled to close, so that the circuit between the third adjacent section and the first adjustable power supply section, and the circuit between the fourth adjacent section and the third adjustable power supply section are connected. This can avoid the situation where the power is cut off and then restored when the train passes through different power supply sections, ensuring seamless switching of the train between adjacent traction substations and improving the stability and safety of train operation.

[0313] Figure 13BThis is another exemplary flowchart of a control method for a train power supply system according to some embodiments of this specification. Figure 13A To and Figure 12 Another schematic diagram of the train power supply system 1200 shown. In some embodiments, process 1300B may be executed by a control device (e.g., control device 140).

[0314] Step 1310B: When a train approaches the first side of the overhead contact line and passes through the first transition zone, approaching the second adjustable power supply section from the first adjustable power supply section, the control device controls the second control switch to be closed, and controls the second voltage regulating converter to work, so as to keep the voltage of the second adjustable power supply section and the first adjustable power supply section consistent.

[0315] The first side of the overhead contact line refers to the side where trains are approaching the traction substation. For example... Figure 12 As shown, the first side 1290 of the overhead contact line can be the side where the train travels from the second traction substation 1220 to the first traction substation 1210. For more information on the overhead contact line, see [link to documentation]. Figure 1A , Figure 1B And its related descriptions.

[0316] When a train approaches from the first side of the overhead contact line, it could mean that a train is traveling from the first side of the overhead contact line towards the traction substation.

[0317] In some embodiments, the control device can control the second control switch 1252 to be closed, so that the circuit between the second adjustable power supply section 1242 and the second voltage regulating converter 1212 is connected, so that the second voltage regulating converter 1212 can supply power to the second adjustable power supply section 1242 and regulate the supply voltage of the second adjustable power supply section 1242.

[0318] In some embodiments, the control device can start the second voltage regulating converter 1212 to work by turning on the switch of the second voltage regulating converter 1212.

[0319] In some embodiments, the control device can set the operating parameters of the second voltage regulating converter 1212 according to the voltage of the first adjustable power supply section 1241, so that the second voltage regulating converter 1212 outputs the same voltage as the first adjustable power supply section 1241, thereby adjusting the voltage of the second adjustable power supply section 1242 to be consistent with the voltage of the first adjustable power supply section 1241.

[0320] By controlling the second control switch 1252 to close, the voltage of the second adjustable power supply section 1242 and the first adjustable power supply section 1241 can be kept consistent, allowing the train passing through the first transition zone 1270 to flexibly travel from the first adjustable power supply section 1241 through the second adjustable power supply section 1242 without interrupting power.

[0321] Step 1320B: When the train approaches the third adjustable power supply section from the second adjustable power supply section, the control device controls the second control switch to be closed, and controls the second voltage regulating converter to work, so as to keep the voltage of the second adjustable power supply section and the third adjustable power supply section consistent.

[0322] Approaching the third adjustable power supply section from the second adjustable power supply section means that the train is traveling from the second adjustable power supply section toward the third adjustable power supply section.

[0323] In some embodiments, the control device can control the second control switch 1252 to be closed by turning on the switch of the second voltage regulating converter 1212, thereby enabling the second voltage regulating converter 1212 to supply power. The control device can set the operating parameters of the second voltage regulating converter 1212 according to the voltage of the third adjustable power supply section 1243, so that the output voltage of the second voltage regulating converter 1212 is the same as that of the third adjustable power supply section 1243, thereby adjusting the voltage of the second adjustable power supply section 1242 to be consistent with the voltage of the third adjustable power supply section 1243.

[0324] By controlling the voltage of the second adjustable power supply section 1242 and the third adjustable power supply section 1243 to be consistent, the train can flexibly travel from the second adjustable power supply section 1242 through the third adjustable power supply section 1243 without interrupting power.

[0325] In some embodiments of this specification, when a train approaches the traction substation from the first side of the overhead contact line, by controlling the second control switch to close and control the second voltage regulating converter to operate so that the voltage of the second adjustable power supply section and the first adjustable power supply section are consistent, and by controlling the third control switch to close and control the third voltage regulating converter to operate so that the voltage of the third adjustable power supply section and the second adjustable power supply section are consistent, it can be ensured that the same voltage is used to power the train, thereby improving the stability and safety of train operation.

[0326] Figure 14 This is an exemplary schematic diagram of another train power supply system according to some embodiments of this specification.

[0327] In railway transportation, "up" and "down" are used to distinguish the direction of train operation, representing two opposite directions of train travel on the railway. The up and down overhead contact lines are used for trains traveling in the two opposite directions (up and down).

[0328] like Figure 14As shown, in some embodiments, the train power supply system 1400, in addition to the first traction substation 1410, the second traction substation 1420, and the third traction substation 1430, also includes an upstream contact network 1481 and a downstream contact network 1482. The upstream contact network 1481 and the downstream contact network 1482 are connected by a parallel switch 1483, and the trains running on the upstream contact network 1482 and the downstream contact network 1483 run in opposite directions. Both the upstream contact network 1481 and the downstream contact network 1482 include, in sequence, a third adjacent section, a first transition zone 1471, a first adjustable power supply section 1441, a third electrical distribution section 1461, a second adjustable power supply section 1442, a fourth electrical distribution section 1462, a third adjustable power supply section 1443, a second transition zone 1472, and a fourth adjacent section; the above structures all include portions located on the upstream contact network and portions located on the downstream contact network. For example, the first transition zone includes an upward first transition zone and a downward first transition zone, and the second transition zone includes an upward second transition zone and a downward second transition zone. The upward first transition zone includes an upward first electrical segment and an upward first segment switch connected in parallel on both sides of the upward first electrical segment; the downward first transition zone includes a downward first electrical segment and a downward first segment switch connected in parallel on both sides of the downward first electrical segment; the upward second transition zone includes an upward second electrical segment and an upward second segment switch connected in parallel on both sides of the upward second electrical segment; the downward second transition zone includes a downward second electrical segment and a downward second segment switch connected in parallel on both sides of the downward second electrical segment.

[0329] For the upstream contact line 1482, its third and fourth adjacent segments and Figure 10 The third adjacent segment 1071 and the fourth adjacent segment 1072 are similar; the first transition zone 1471 and its first electrical section and first sectionalizing switch, the second transition zone 1472 and its second electrical section and second sectionalizing switch are respectively similar to... Figure 10 The first transition zone 1050 and its first electrical section 1051 and first sectionalizing switch 1052, and the second transition zone 1060 and its second electrical section 1061 and second sectionalizing switch 1062 are similar; the first adjustable power supply section 1441, the second adjustable power supply section 1442, and the third adjustable power supply section 1443 are respectively similar to Figure 10 The first adjustable power supply section 1041, the second adjustable power supply section 1042, and the third adjustable power supply section 1043 are similar. Similarly, the downlink contact network 1481 is consistent with the uplink contact network 1482, and also... Figure 10 The corresponding structure is similar; for more details, please refer to [link / reference]. Figure 10 And related explanations.

[0330] In some embodiments, such as Figure 14 As shown, the first traction substation 1410 includes a fourth voltage regulating converter 1411, a fifth voltage regulating converter 1412, a sixth voltage regulating converter 1413, and a seventh voltage regulating converter 1414.

[0331] like Figure 14 As shown, the third electrical segment 1461 includes a downlink third electrical segment and an uplink third electrical segment, and the fourth electrical segment 1462 includes a downlink fourth electrical segment and an uplink fourth electrical segment.

[0332] In some embodiments, the fourth voltage regulating converter 1411 is connected to the first adjustable power supply section via the first uplink control switch 1452 and the first adjustable power supply section via the first downlink control switch 1451; the fifth voltage regulating converter 1412 is connected to the second adjustable power supply section via the second downlink control switch 1453; the sixth voltage regulating converter 1413 is connected to the second adjustable power supply section via the second uplink control switch 1454; and the seventh voltage regulating converter 1414 is connected to the third adjustable power supply section via the third uplink control switch 1456 and the third adjustable power supply section via the third downlink control switch 1455.

[0333] The downlink third and fourth electrical sections refer to the portions of the third electrical section 1461 and the fourth electrical section 1462 located within the downlink contact line 1482. The uplink third and fourth electrical sections refer to the portions of the third electrical section 1461 and the fourth electrical section 1462 located within the uplink contact line 1482.

[0334] The downlink first adjustable power supply section, downlink second adjustable power supply section, and downlink third adjustable power supply section refer to the portions of the first adjustable power supply section 1441, the second adjustable power supply section 1442, and the third adjustable power supply section 1443 located within the downlink contact network, respectively. The uplink first adjustable power supply section, uplink second adjustable power supply section, and uplink third adjustable power supply section refer to the portions of the first adjustable power supply section 1441, the second adjustable power supply section 1442, and the third adjustable power supply section 1443 located within the uplink contact network, respectively.

[0335] In some embodiments of this specification, by setting up an upward contact network and a downward contact network, and by setting up a third adjacent section, a first transition zone, a first adjustable power supply section, a fifth electrical sub-section, a second adjustable power supply section, a sixth electrical sub-section, a third adjustable power supply section, a second transition zone, and a fourth adjacent section that are sequentially connected to the upward and downward contact networks, a hardware foundation is provided for the smooth operation of trains traveling in both directions without power interruption.

[0336] In some embodiments, when the up-line and down-line overhead contact lines simultaneously receive and dispatch trains, the control device can control the in-phase traction substation 1410 to adjust the voltage of the second adjustable power supply section, so that the voltage of the second adjustable power supply section 1442 is consistent with the voltage of the first adjustable power supply section 1441 or the third adjustable power supply section 1443, so that the train passes through the electrical sub-sections (e.g., the fifth electrical sub-section 1461 and the sixth electrical sub-section 1462) at both ends of the second adjustable power supply section.

[0337] Simultaneous train reception and dispatch on both the up-line and down-line overhead contact lines means that trains are moving from the out-of-phase traction device to the in-phase traction device on both the up-line and down-line overhead contact lines.

[0338] In some embodiments, the control device can control the operating parameters of the fifth voltage regulating transformer 1412 or the sixth voltage regulating transformer 1413 based on the voltage data of the first adjustable power supply section 1441 or the third adjustable power supply section 1443, respectively, so that the voltage output by the fifth voltage regulating transformer 1412 or the sixth voltage regulating transformer 1413 is consistent with the voltage data of the first adjustable power supply section 1441 or the third adjustable power supply section 1443. The voltage data includes voltage amplitude, frequency, phase, and other data. For further explanation regarding voltage consistency, please refer to... Figure 13A And its related descriptions.

[0339] Figure 15A This is another exemplary flowchart of a control method for a train power supply system according to some embodiments of this specification. In some embodiments, when Figure 14 When the upward contact network 1481 and the downward contact network 1482 shown simultaneously receive and dispatch trains traveling in opposite directions, for the upward contact network 1481, the control device (e.g., control device 140) can execute steps 1510A to 1530A in process 1500A.

[0340] Step 1510A: In the initial state, the seventh voltage regulating converter is controlled by the control device to keep the voltage of the third adjustable power supply section and the fourth adjacent section of the upward flow consistent, and the second segment switch of the upward flow is closed; and the fourth voltage regulating converter is controlled to keep the voltage of the first adjustable power supply section and the third adjacent section of the upward flow consistent, and the first segment switch of the upward flow is closed.

[0341] In some embodiments, the seventh voltage regulator converter is controlled by the control device. For example, the control device can set the operating parameters of the seventh voltage regulator converter 1414 according to the voltage data of the fourth adjacent segment, so that the seventh voltage regulator converter 1414 outputs the same voltage as the fourth adjacent segment (e.g., the adjacent power supply segment of the third adjustable power supply segment), thereby adjusting the voltage of the third adjustable power supply segment to be consistent with the voltage of the fourth adjacent segment.

[0342] In some embodiments, when the upward second section switch is closed, the circuit between the fourth adjacent section in the upward contact network 1481 and the upward third adjustable power supply section is connected, and the train can pass through the upward fourth adjacent section to enter the upward third adjustable power supply section without interruption of power.

[0343] In some embodiments, the control device may also control the voltage of the first adjustable power supply section of the upward movement in a manner similar to controlling the voltage of the third adjustable power supply section of the upward movement, such as by controlling the fourth voltage regulating converter of the control device to operate, so as to keep the voltage of the first adjustable power supply section of the upward movement consistent with the voltage of the third adjacent section, so that the train can pass through the first adjustable power supply section of the upward movement and enter the third adjacent section of the upward movement without interrupting power.

[0344] In some embodiments, closing the first upward segment switch can produce a similar effect to closing the second upward segment switch.

[0345] Step 1520A: When the train approaches the second adjustable power supply section from the third adjustable power supply section, the sixth voltage regulating converter is controlled by the control device to keep the voltage of the second adjustable power supply section and the third adjustable power supply section consistent.

[0346] The train approaching the second adjustable power supply section from the third adjustable power supply section means that the train is traveling from the third adjustable power supply section to the second adjustable power supply section.

[0347] In some embodiments, the control device can set the operating parameters of the sixth voltage regulating converter 1413 according to the voltage of the third adjustable power supply section, and simultaneously control the second control switch 1454 to close, so that the sixth voltage regulating converter 1413 outputs the same voltage as the third adjustable power supply section, thereby adjusting the voltage of the second adjustable power supply section to be consistent with the voltage of the third adjustable power supply section, so that the train can flexibly and continuously switch from the third adjustable power supply section to the second adjustable power supply section.

[0348] Step 1530A: When the train approaches the first adjustable power supply section from the second adjustable power supply section, the sixth voltage regulating converter is controlled by the control device to keep the voltage of the second adjustable power supply section and the first adjustable power supply section consistent.

[0349] The train approaching the first adjustable power supply section from the second adjustable power supply section means that the train is traveling from the second adjustable power supply section to the first adjustable power supply section.

[0350] In some embodiments, the control device can set the operating parameters of the sixth voltage regulating converter 1413 according to the voltage of the first adjustable power supply section, and at the same time control the second control switch 1454 to close, so that the sixth voltage regulating converter 1413 outputs the same voltage as the first adjustable power supply section, thereby adjusting the voltage of the second adjustable power supply section to be consistent with the voltage of the first adjustable power supply section, so that the train can flexibly and continuously switch from the second adjustable power supply section to the first adjustable power supply section.

[0351] Figure 15BThis is another exemplary flowchart of a control method for a train power supply system according to some embodiments of this specification. In some embodiments, when the up-line and down-line contact networks simultaneously receive and dispatch trains traveling in opposite directions, for the down-line contact network 1482, the control device (e.g., control device 140) may execute steps 1510B to 1530B in process 1500B.

[0352] Step 1510B: In the initial state, the fourth voltage regulating converter is controlled by the control device to keep the voltage of the first adjustable power supply section of the downlink and the third adjacent section of the downlink consistent, and the first segment switch of the downlink is closed; and the seventh voltage regulating converter is controlled by the control device to keep the voltage of the third adjustable power supply section of the downlink and the fourth adjacent section of the downlink consistent, and the second segment switch of the downlink is closed.

[0353] In some embodiments, the control device controls the operation of the fourth voltage regulating converter. For example, the control device can set the operating parameters of the fourth voltage regulating converter 1411 according to the voltage data of the third adjacent section, so that the fourth voltage regulating converter 1411 outputs the same voltage as the third adjacent section, thereby adjusting the voltage of the downstream first adjustable power supply section to be consistent with the voltage of the third adjacent section.

[0354] In some embodiments, when the first downstream section switch is closed, the circuit between the third adjacent section in the downstream contact network 1482 and the first downstream adjustable power supply section is connected, and the train can pass through the third downstream adjacent section to enter the first downstream adjustable power supply section without interruption of power.

[0355] In some embodiments, the control device may also control the voltage of the third adjustable power supply section of the downlink in a manner similar to controlling the voltage of the first adjustable power supply section of the downlink, such as by controlling the seventh voltage regulating converter to operate, so as to keep the voltage of the third adjustable power supply section of the downlink consistent with the voltage of the fourth adjacent downlink section, so that the train can pass through the third adjustable power supply section of the downlink and enter the fourth adjacent downlink section without interruption of power.

[0356] In some embodiments, closing the downlink second segment switch can produce a similar effect to closing the downlink first segment switch.

[0357] Step 1520B: When the train approaches the second adjustable power supply section from the first adjustable power supply section, the fifth voltage regulating converter is controlled by the control device to keep the voltage of the second adjustable power supply section and the first adjustable power supply section consistent.

[0358] The train moving from the first adjustable power supply section to the second adjustable power supply section means that the train is traveling from the first adjustable power supply section to the second adjustable power supply section.

[0359] In some embodiments, the control device can set the operating parameters of the fifth voltage regulating converter 1412 according to the voltage of the first adjustable power supply section, and at the same time control the second control switch 1453 to close, so that the fifth voltage regulating converter 1412 outputs the same voltage as the first adjustable power supply section, thereby adjusting the voltage of the second adjustable power supply section to be consistent with the voltage of the first adjustable power supply section, so that the train can enter the second adjustable power supply section from the first adjustable power supply section without interrupting power.

[0360] Step 1530B: When the train approaches the third adjustable power supply section from the second adjustable power supply section, the fifth voltage regulating converter is controlled by the control device to keep the voltage of the second and third adjustable power supply sections consistent.

[0361] The train moving from the second adjustable power supply section to the third adjustable power supply section means that the train is traveling from the second adjustable power supply section to the third adjustable power supply section.

[0362] In some embodiments, the control device can set the operating parameters of the fifth voltage regulating converter 1412 according to the voltage of the third adjustable power supply section, and at the same time control the second control switch 1453 to close, so that the fifth voltage regulating converter 1412 outputs the same voltage as the third adjustable power supply section, thereby adjusting the voltage of the second adjustable power supply section to be consistent with the voltage of the third adjustable power supply section, so that the train can enter the third adjustable power supply section from the second adjustable power supply section without power interruption.

[0363] In some embodiments of this specification, when trains are simultaneously connected to and dispatched on the up-line and down-line overhead contact lines, the sixth voltage regulating converter and the fifth voltage regulating converter control the up-line second adjustable power supply section and the down-line second adjustable power supply section respectively, so as to keep the voltage of the up-line second adjustable power supply section the same as that of the up-line first adjustable power supply section and the up-line third adjustable power supply section, and to keep the voltage of the down-line second adjustable power supply section the same as that of the down-line first adjustable power supply section and the down-line third adjustable power supply section. This can meet the stable power supply requirements when two trains traveling in opposite directions need to be dynamically connected at the same time, ensuring that both trains operate stably and safely.

[0364] Figure 16 This is a schematic diagram of the topology of another train power supply system according to some embodiments of this specification. It should be noted that the following embodiments are for illustrative purposes only and do not constitute a limitation thereof.

[0365] In some embodiments, such as Figure 16As shown, the transition zone in the train power supply system 1600 may include a first transition zone 1611, a second transition zone 1612, and a third transition zone 1613; the overhead contact line is electrically divided into a first power supply section 1621, a second power supply section 1622, a third power supply section 1623, and a fourth power supply section 1624. Specifically, the first side of the first transition zone 1611 is connected to the first power supply section 1621, and the second side is connected to the second power supply section 1622; the first side of the second transition zone 1612 is connected to the second power supply section 1622, and the second side is connected to the third power supply section 1623; the first side of the third transition zone 1613 is connected to the third power supply section 1623, and the second side is connected to the fourth power supply section 1624.

[0366] In some embodiments, the electrical segmentation may include, but is not limited to, a first electrical segment 1681, a second electrical segment 1682, and a third electrical segment 1683. The electrical segmentation is an indispensable component of the transition region and forms the basis of its structure. More information about electrical segments can be found at [link to relevant documentation]. Figure 18 , Figure 20 And its related descriptions.

[0367] The first side of the first transition zone 1611 can be the side of the first transition zone 1611 that is in the same direction as the train's travel. The second side of the first transition zone 1611 can be the side of the second transition zone 1611 that is in the opposite direction to the train's travel. For example... Figure 16 As shown, in response to the train 1650 moving to the right, the first side of the first transition zone 1611 is the left side of the first transition zone 1611, and the second side is the right side of the first transition zone 1611.

[0368] The first and second sides of the second transition zone 1612 and the first and second sides of the third transition zone 1613 are similar to the first and second sides of the first transition zone 1611, and will not be described again here.

[0369] In some embodiments, such as Figure 16 As shown, the first transition zone 1611 is the area connecting the first power supply segment 1621 and the second power supply segment 1622; the second transition zone 1612 is the area connecting the second power supply segment 1622 and the third power supply segment 1623; and the third transition zone 1613 is the area connecting the third power supply segment 1623 and the fourth power supply segment 1624.

[0370] For more information about the transition zone, please see [link / reference]. Figure 1A , Figure 1B And its related descriptions.

[0371] In summary, the overhead contact system refers to the continuous power supply system installed above railways to provide electrical energy to electric locomotives or trains. A power supply section is a segment of the overhead contact system that has independent power supply functions. In some embodiments, power supply sections can be connected by transition zones to ensure that trains can smoothly transition from one power supply section to another during operation without interrupting power supply. More information about overhead contact systems and power supply sections can be found at [link to relevant documentation]. Figure 1A , Figure 1B And its related descriptions.

[0372] Control device 1630 refers to the device used to control the adjustment of the power supply voltage of traction substation 1640, and its structure is similar to... Figure 1A and 1B The control device 140 is similar. For example, the control device 1630 may include, but is not limited to, a processor, memory, sensor interface, etc.

[0373] In some embodiments, the control device 1630 is configured to: when the train 1650 approaches the first transition zone 1611, control the traction substation 1640 to adjust the supply voltage of the second power supply section 1622, such that the first supply voltage difference across the first transition zone 1611 is less than a voltage threshold; when the train 1650 approaches the second transition zone 1612, control the traction substation 1640 to adjust the supply voltages of the second power supply section 1622 and the third power supply section 1623, such that the second supply voltage difference across the second transition zone 1612 is less than a voltage threshold; and when the train 1650 approaches the third transition zone 1613, control the traction substation 1640 to adjust the supply voltage of the third power supply section 1623, such that the third supply voltage difference across the third transition zone 1613 is less than a voltage threshold. Further details about this embodiment can be found in [link to relevant documentation]. Figure 17 And its related descriptions.

[0374] In some embodiments, the control device 1630 may also be configured to, based on the position information of the train 1650 and the power supply voltage information of the overhead contact line, control the traction substation 1640 to adjust the power supply voltage of the overhead contact line on both sides of the first transition zone 1611, the second transition zone 1612, or the third transition zone 1613, such that the difference between the power supply voltages on both sides of the first transition zone 1611, the second transition zone 1612, or the third transition zone 1613 (e.g., the first power supply voltage difference, the second power supply voltage difference, or the third power supply voltage difference) is less than a voltage threshold. More details about this embodiment can be found in [link to relevant documentation]. Figure 17 And its related descriptions.

[0375] Traction substation 1640, structurally similar to traction substation 120, is a traction substation that provides adjustable supply voltage (including voltage amplitude and phase) to the contact network power supply section. For example, traction substation 1640 may include, but is not limited to, transformers and other electrical equipment. More information about traction substation 1640 can be found at [link to relevant documentation]. Figure 1A , Figure 1B And its related descriptions.

[0376] In some embodiments, such as Figure 16 As shown, the traction substation 1640 may include a first adjustable voltage output port 1641 and a second adjustable voltage output port 1642. The first adjustable voltage output port 1641 is connected to the second power supply section 1622, and the second adjustable voltage output port 1642 is connected to the third power supply section 1623. The power supply voltage of the second power supply section 1622 can be adjusted based on the first adjustable voltage output port 1641; the power supply voltage of the third power supply section 1623 can be adjusted based on the second adjustable voltage output port 1642.

[0377] The first adjustable voltage output port 1641 refers to the port used to adjust the supply voltage of the second power supply section 1622. For example, the first adjustable voltage output port 1641 may include electrical components such as transformers and electronic controllers.

[0378] The second adjustable voltage output port 1642 refers to the port used to adjust the supply voltage of the third power supply section 1623. For example, the second adjustable voltage output port 1642 may include electrical components such as transformers and electronic controllers.

[0379] In some embodiments, the control device 1630 can obtain the power supply voltage information of the power supply section based on the voltage transformer. More information about power supply voltage can be found in [link to relevant documentation]. Figure 1A , Figure 1B , Figures 2-3 , Figures 10-11 And its related descriptions.

[0380] In some embodiments of this specification, the power supply voltage of the second power supply section 1622 and the third power supply section 1623 can be precisely controlled through the first adjustable voltage output port 1641 and the second adjustable voltage output port 1642, so that they match the adjacent power supply sections, thereby reducing the problem of power supply voltage mismatch that the train 1650 may encounter when passing through the transition zone.

[0381] In some embodiments of this specification, by clearly defining the first transition zone 1611, the second transition zone 1612, and the third transition zone 1613, and connecting different power supply sections, it is ensured that the train 1650 can achieve a seamless transition of power supply when passing through these transition zones, thus avoiding power interruption.

[0382] In some embodiments, such as Figure 16 As shown, the first transition zone 1611 may include at least one first voltage transformer 1611 and at least one first position sensor 1671; the second transition zone 1612 may include at least one second voltage transformer (e.g., second voltage transformer 1662-1 and second voltage transformer 1662-2) and at least one second position sensor 1672; and the third transition zone 1613 may include at least one third voltage transformer 1663 and at least one third position sensor 1673. The voltage transformers are configured to detect the power supply voltage information of the overhead contact line, and the position sensors are configured to detect the position information of the train.

[0383] In some embodiments, the train power supply system 1600 can, through the control device 1630, control the traction substation 1640 to adjust the power supply voltage of the contact network on both sides of the first transition zone 1611, the second transition zone 1612, or the third transition zone 1613 based on the position information of the train 1650 and the power supply voltage information of the contact network, so that the difference between the power supply voltages on both sides of the first transition zone 1611, the second transition zone 1612, or the third transition zone 1613 is less than a voltage threshold. More details about this embodiment can be found in [link to relevant documentation]. Figure 17 And its related descriptions.

[0384] In some embodiments of this specification, by installing voltage transformers and position sensors in the transition zone, the power supply voltage of the overhead contact line and the position information of the train can be obtained in real time.

[0385] Figure 17 This is an exemplary flowchart illustrating the adjustment of the supply voltage according to some embodiments of this specification. Figure 17 To and Figure 16 The diagram shows the flow chart corresponding to the train power supply system 1600. (For example...) Figure 17 As shown, process 1700 may include the following steps. In some embodiments, process 1700 may be executed based on control device 1630.

[0386] Step 1710: When the train approaches the first transition zone, the control device controls the traction substation to adjust the power supply voltage of the second power supply section so that the difference in power supply voltage on both sides of the first transition zone is less than the voltage threshold.

[0387] More information about voltage thresholds can be found at [link to relevant documentation]. Figure 1A , Figure 1B And its related descriptions.

[0388] Approaching refers to the process where the relative distance between the train's current position and the transition zone is less than a preset distance threshold. In some embodiments, in response to the train 1650 traveling from the first transition zone 1611 to the third transition zone 1613, "train 1650 approaching the first transition zone 1611" can refer to the process where the relative distance between the front of the train 1650 and the first side of the first transition zone 1611 is less than a preset distance threshold. More information about the first side can be found in [link to relevant documentation]. Figure 16 And its related descriptions.

[0389] The preset distance threshold refers to the threshold used to determine whether the distance between the train and the transition zone is short enough. As an example only, the preset distance can be 100 meters, 50 meters, etc., and is not limited here.

[0390] In some embodiments, the preset distance threshold may be set by a professional technician or by the system default.

[0391] More information about the first transition zone 1611, control device 1630, traction substation 1640, second power supply section 1622, power supply voltage, and voltage threshold can be found in [link to relevant documentation]. Figure 16 And its related descriptions.

[0392] The first supply voltage difference refers to the numerical difference in supply voltage (such as voltage, phase, etc.) between the two sides of the first transition zone 1611, that is, between the first supply segment 1621 and the second supply segment 1622.

[0393] In some embodiments, the control device 1650 may use the absolute value of the difference between the supply voltage of the first power supply segment 1621 and the supply voltage of the second power supply segment 1622 as the first supply voltage difference.

[0394] In some embodiments, when the train 1650 approaches the first transition zone 1611, the control device 1650 can adjust the power supply voltage of the second power supply section 1622 by controlling the traction substation 1640, so that the difference between the first power supply voltages on both sides of the first transition zone 1611 is less than the voltage threshold.

[0395] In some embodiments, when the train 1650 approaches the first transition zone 1611, the control device 1650 can also adjust the power supply voltage of the second power supply section 1622 based on the first adjustable voltage output port 1641 of the traction substation 1640, so that the difference between the first power supply voltages on both sides of the first transition zone 1611 is less than the voltage threshold.

[0396] Step 1720: When the train approaches the second transition zone, the control device controls the traction substation to adjust the power supply voltage of the second power supply section and the third power supply section so that the difference in power supply voltage on both sides of the second transition zone is less than the voltage threshold.

[0397] More information about the second transition zone 1612, the second power supply section 1622, and the third power supply section 1623 can be found in [link to relevant documentation]. Figure 16 And its related descriptions.

[0398] In some embodiments, when the train 1650 travels from the first transition zone 1611 to the third transition zone 1613, "the train 1650 approaches the second transition zone 1612" can refer to the process in which the relative distance between the front of the train 1650 and the first side of the second transition zone 1612 is less than a preset distance threshold.

[0399] The second power supply voltage difference refers to the numerical difference in power supply voltage (such as voltage, phase, etc.) between the two sides of the second transition zone 1612, namely the second power supply section 1622 and the third power supply section 1623.

[0400] In some embodiments, the second supply voltage difference is obtained in a similar manner to the first supply voltage difference, and will not be described again here.

[0401] In some embodiments, when the train 1650 approaches the second transition zone 1612, the control device 1630 can adjust the power supply voltage of the second power supply section 1622 and the third power supply section 1623 by controlling the traction substation 1640, so that the difference between the second power supply voltages on both sides of the second transition zone 1612 is less than the voltage threshold.

[0402] In some embodiments, the control device 1630 can also adjust the power supply voltage of the second power supply section 1622 through the first adjustable voltage output port 1641 of the traction substation 1640, and adjust the power supply voltage of the third power supply section 1623 through the second adjustable voltage output port 1642 of the traction substation 1640, thereby making the second power supply voltage difference on both sides of the second transition zone 1612 less than the voltage threshold.

[0403] Step 1730: When the train approaches the third transition zone, the control device controls the traction substation to adjust the power supply voltage of the third power supply section so that the difference in power supply voltage on both sides of the third transition zone is less than the voltage threshold.

[0404] More information about the Third Transition Zone 1613 can be found at [link to relevant documentation]. Figure 16 And its related descriptions.

[0405] In some embodiments, when the train 1650 travels from the first transition zone 1611 to the third transition zone 1613, "the train 1650 approaches the third transition zone 1613" can refer to the process in which the relative distance between the front of the train 1650 and the first side of the third transition zone 1613 is less than a preset distance threshold.

[0406] The third power supply voltage difference refers to the numerical difference in power supply voltage (such as voltage, phase, etc.) between the two sides of the third transition zone 1613, namely the third power supply section 1623 and the fourth power supply section 1624.

[0407] In some embodiments, the third supply voltage difference is obtained in a similar way to the first supply voltage difference, and will not be described again here.

[0408] In some embodiments, when the train 1650 approaches the third transition zone 1613, the control device 1630 can adjust the power supply voltage of the third power supply section 1623 by controlling the traction substation 1640, so that the difference in the third power supply voltage on both sides of the third transition zone 1613 is less than the voltage threshold.

[0409] In some embodiments, the control device 1630 can also adjust the power supply voltage of the third power supply section 1623 through the second adjustable voltage output port 1642 of the traction substation 1640, thereby making the third power supply voltage difference on both sides of the third transition zone 1613 less than the voltage threshold.

[0410] In some embodiments of this specification, by adjusting the supply voltage of each power supply section as the train approaches each transition zone, the voltage difference between the two sides of the transition zone is ensured to be less than a voltage threshold, thus avoiding power instability or electrical faults and achieving power supply stability. Simultaneously, this also makes the switching between adjacent power supply sections smoother and reduces electrical shocks. Ultimately, by precisely controlling the supply voltage, the power supply stability of the train in the transition zone is guaranteed, improving the overall efficiency of train operation and reducing speed reductions or stoppages caused by power fluctuations, thereby providing more stable, reliable, and efficient power supply support.

[0411] In some embodiments, the control device 1630 may also control the traction substation 1640 to adjust the power supply voltage of the contact network on both sides of the first transition zone 1611, the second transition zone 1612, or the third transition zone 1613 based on the position information of the train 1650 and the power supply voltage information of the contact network, so that the difference between the power supply voltages on both sides of the first transition zone 1611, the second transition zone 1612, or the third transition zone 1613 is less than the voltage threshold.

[0412] Location information refers to the specific location of the train within the transition zone. For example, location information could include the train 1650 being located in the first transition zone 1611, or the distance between the front of the train and a certain location being less than a preset distance threshold.

[0413] In some embodiments, the control device 1630 may acquire the position information of the train based on a position sensor.

[0414] In some embodiments of this specification, the control device 1630 can precisely adjust the traction substation 1640 based on position information and power supply voltage to reduce the voltage difference between the two sides of the transition zone, thereby improving the smoothness of train operation.

[0415] It should be noted that the above description of process 1700 is for illustrative purposes only and does not limit the scope of this specification. Those skilled in the art can make various modifications and changes to process 1700 under the guidance of this specification. However, these modifications and changes remain within the scope of this specification.

[0416] Figure 18 This is a schematic diagram of the topology of a train power supply system according to other embodiments of this specification. It should be noted that the following embodiments are for illustrative purposes only and do not constitute a limitation thereof.

[0417] In some embodiments, such as Figure 18 As shown, the first transition zone 1811 in the train power supply system 1800 includes a first electrical section 1881, a first voltage transformer 1861, and a first position sensor 1871. The first voltage transformer and the first position sensor are located on the first side of the first electrical section (i.e., to the left of the first electrical section 1881 in the figure). The second transition zone 1812 includes a second electrical section 1882, two second voltage transformers (e.g., second voltage transformer 1862-1 and second voltage transformer 1862-2), and a second position sensor 1872. The second voltage transformer 1862-1 is located on the first side of the second electrical segment 1882 (i.e., on the left side of the second electrical segment 1882 in the figure), the second voltage transformer 1862-2 is located on the second side of the second electrical segment 1882 (i.e., on the right side of the second electrical segment 1882 in the figure), and the second position sensor 1872 is located on the first side of the second electrical segment 1882 (i.e., on the left side of the second electrical segment 1882). The third transition zone 1813 includes a third electrical segment 1883, a third voltage transformer 1863, and a third position sensor 1873. The third voltage transformer 1863 is located on the second side of the third electrical segment 1883 (i.e., on the right side of the third electrical segment 1883 in the figure), and the third position sensor 1873 is located on the first side of the third electrical segment (i.e., on the left side of the third electrical segment 1883 in the figure).

[0418] More information about the first and second sides can be found at [link to relevant documentation]. Figure 16And related descriptions. Transition zones (e.g., first transition zone, second transition zone, and third transition zone), power supply sections (e.g., first power supply section, second power supply section, third power supply section, and fourth power supply section), control devices, traction substations, first adjustable voltage output port, second adjustable voltage output port, train, voltage transformers (e.g., first voltage transformer, second voltage transformer, third voltage transformer, and fourth voltage transformer), position sensors (e.g., first position sensor, second position sensor, and third position sensor) and Figure 16 The transition zone, power supply section, control device, traction substation, first adjustable voltage output port, second adjustable voltage output port, train, voltage transformer, and position sensor are similar and will not be described in detail here.

[0419] In some embodiments, such as Figure 18 As shown, the electrical segmentation may include, but is not limited to, the first electrical segment 1881, the second electrical segment 1882, and the third electrical segment 1883.

[0420] In some embodiments of this specification, by dividing the power supply into multiple electrical segments, sudden changes in voltage and other situations can be reduced when the train passes through different transition zones, enabling more precise adjustment of the power supply voltage and thus ensuring the stability and safety of the power supply during train operation.

[0421] In some embodiments of this specification, by installing voltage transformers and position sensors in various electrical sections and transition zones, the power supply voltage and the position of the train can be monitored, thereby achieving a smooth transition of the power supply voltage, avoiding power supply interruption or deterioration of power supply quality, and ensuring the safe and stable operation of the train.

[0422] Figure 19A This is an exemplary flowchart illustrating the adjustment of the supply voltage according to some embodiments of this specification. Figure 19A The trains passed by in sequence. Figure 18 The diagram shows the adjustment of the supply voltage in the first transition zone 1811, the second transition zone 1812, and the third transition zone 1813. Figure 19A As shown, process 1910 may include the following steps. In some embodiments, process 1910 may be executed based on control device 1830.

[0423] Step 1911: If the first position sensor detects the arrival of a train, the control device controls the traction substation to adjust the voltage of the first adjustable output port so that the voltage difference between the two sides of the first electrical section in the first transition zone is less than the voltage threshold. That is, the voltage difference between the second voltage transformer located on the first side of the second electrical section in the second transition zone and the first voltage transformer located on the first side of the first electrical section in the first transition zone (i.e., the third voltage difference) is less than the voltage threshold.

[0424] The third voltage difference refers to the difference between the voltage values ​​measured by the second voltage transformer 1862-1 and the first voltage transformer 1861, which are located on the first side of the second electrical section 1882 in the second transition zone 1812.

[0425] In some embodiments, the control device 1830 may use the absolute value of the difference between the voltage values ​​measured by the second voltage transformer 1862-1 and the first voltage transformer 1861 as the third voltage difference.

[0426] The voltage threshold refers to the upper limit of the voltage difference set in order to maintain the stability of the train power supply system and the safe operation of the equipment. It can be used as the insulation tolerance limit for pantograph-catenary arcing in the electrical substation.

[0427] In some embodiments, the voltage threshold may be set by a professional technician or by system default.

[0428] In some embodiments, when train 1850 sequentially passes through the first transition zone 1811, the second transition zone 1812, and the third transition zone 1813, if the first position sensor 1871 detects the arrival of train 1850, the control device 1830 controls the traction substation 1840 to adjust the voltage of the first adjustable voltage output port 1841, so that the third voltage difference between the second voltage transformer 1862-1 and the first voltage transformer 1861 located on the first side of the second electrical section 1882 in the second transition zone 1812 is less than a voltage threshold. This allows train 1850 to flexibly pass through the first electrical section 1881 without interrupting power, and thus allows train 1850 to flexibly pass through the first transition zone 1811 without interrupting power.

[0429] Flexible uninterruptible power supply refers to a technology used to ensure the continuity and stability of power supply to trains during the switching of different electrical sections.

[0430] More information about the control device 1830, traction substation 1840, first adjustable voltage output port 1841, second transition zone 1812, voltage transformer, and position sensor can be found in [link to relevant documentation]. Figures 16-18 And its related descriptions.

[0431] Step 1912: If the second position sensor detects the arrival of a train, the control device controls the traction substation to adjust the voltage of the first adjustable voltage output port and the second adjustable voltage output port, so that the voltage difference between the two sides of the second electrical section in the second transition zone is less than the voltage threshold. That is, the voltage difference between the two second voltage transformers on both sides of the second electrical section (also called the second voltage difference) is less than the voltage threshold.

[0432] The second voltage difference refers to the difference in voltage values ​​measured by the two second voltage transformers in the second transition zone.

[0433] In some embodiments, the second voltage difference and the third voltage difference are obtained in a similar manner, and will not be described again here.

[0434] In some embodiments, if the second position sensor 1872 detects the arrival of a train 1850, the control device 1830 controls the traction substation 1840 to adjust the voltage of the first adjustable voltage output port 1841 and the second adjustable voltage output port 1842, so that the second difference between the second voltage transformer 1862-1 and the second voltage transformer 1862-2 is less than a voltage threshold. This allows the train 1850 to flexibly pass through the second electrical section 1882 without power interruption, and thus allows the train 1850 to flexibly pass through the second transition zone 1812 without power interruption.

[0435] More information about the control device 1830, traction substation 1840, first adjustable voltage output port 1841, second adjustable voltage output port 1842, voltage transformer, and position sensor can be found in [link to relevant documentation]. Figures 16-18 And its related descriptions.

[0436] Step 1913: If the third position sensor detects that a train has arrived, the control device controls the traction substation to adjust the voltage of the second adjustable voltage output port so that the difference in power supply voltage on both sides of the third electrical section of the third transition zone (i.e., the fourth voltage difference) is less than the voltage threshold.

[0437] The fourth voltage difference refers to the difference between the voltage values ​​measured by the second voltage transformer 1862-2 located on the second side of the second electrical section 1882 in the second transition zone 1812 and the third voltage transformer 1863 located on the second side of the third electrical section 1883 in the third transition zone 1813.

[0438] In some embodiments, the fourth voltage difference is obtained in a similar manner to the third voltage difference, and will not be described again here.

[0439] In some embodiments, if the third position sensor 1873 detects the arrival of a train 1850, the control device 1830 controls the traction substation 1840 to adjust the voltage of the second adjustable voltage output port 1842, so that the fourth voltage difference between the second voltage transformer 1862-2 and the third voltage transformer 1863, which are located on the second side of the second electrical section 1882 in the second transition zone 1812, is less than a voltage threshold. This allows the train 1850 to flexibly pass through the third electrical section 1883 without power interruption, and thus allows the train 1850 to flexibly pass through the third transition zone 1813 without power interruption.

[0440] More information about the control device 1830, traction substation 1840, second adjustable voltage output port 1842, second transition zone 1812, voltage transformer, and position sensor can be found in [link to relevant documentation]. Figures 16-18 And its related descriptions.

[0441] In some embodiments of this specification, in response to the train 1850 sequentially passing through different transition zones, the control device 1830 can adjust the voltage of the first adjustable voltage output port 1841 and / or the second adjustable voltage output port 1842 of the traction substation 1840 to ensure that the voltage difference across the transition zone remains within a voltage threshold. Furthermore, by setting multiple electrical sections, current surges caused by voltage fluctuations can be effectively avoided, further ensuring a smooth transition for the train when passing through different transition zones and improving the safety of the train power supply system.

[0442] Figure 19B This is another exemplary flowchart illustrating the adjustment of the supply voltage according to some embodiments of this specification. Figure 19B As shown, process 1920 may include the following steps, which illustrates two trains passing by simultaneously. Figure 18 This diagram illustrates the adjustment of the supply voltage for any two of the first transition region 1811, the second transition region 1812, and the third transition region 1813. In some embodiments, process 1920 may be executed based on control device 1830.

[0443] Step 1921: If the first position sensor detects that a train has arrived and the second position sensor detects that a train has arrived, the control device controls the traction substation to adjust the voltage of the first adjustable voltage output port and the second adjustable voltage output port so that the difference in supply voltage on both sides of the first electrical section of the first transition zone (i.e., the third voltage difference) is less than the voltage threshold and the difference in supply voltage on both sides of the second electrical section of the second transition zone (i.e., the second voltage difference) is less than the voltage threshold.

[0444] In some embodiments, when two trains simultaneously pass through any two of the first transition zone 1811, the second transition zone 1812, and the third transition zone 1813, if the first position sensor 1871 detects the arrival of a train and the second position sensor 1872 detects the arrival of a train, the control device 1830 controls the traction substation 1840 to adjust the voltage of the first adjustable voltage output port 1841 and the second adjustable voltage output port 1842, so that the third voltage difference between the second voltage transformer 1862-1 located on the first side of the second electrical section 1882 in the second transition zone 1812 and the first voltage transformer 1861 located in the first electrical section is less than the voltage threshold, and the second voltage difference between the second voltage transformer 1862-1 and the second voltage transformer 1862-2 on both sides of the second electrical section in the second transition zone is less than the voltage threshold. This allows train 1850 to flexibly pass through the first electrical section 1881 and the second electrical section 1882 without interruption of power, and train 1850 to flexibly pass through the first transition zone 1811 and the second transition zone 1812 without interruption of power.

[0445] For more information on the third voltage difference, the second voltage difference, and the voltage threshold, please refer to [link / reference needed]. Figure 19A And its related descriptions.

[0446] Step 1922: If the first position sensor detects that a train has arrived and the third position sensor detects that a train has arrived, the control device controls the traction substation to adjust the voltage of the first adjustable voltage output port and the second adjustable voltage output port so that the difference in supply voltage on both sides of the first electrical section of the first transition zone (i.e., the third voltage difference) is less than the voltage threshold and the difference in supply voltage on both sides of the third electrical section of the third transition zone (i.e., the fourth voltage difference) is less than the voltage threshold.

[0447] In some embodiments, if the first position sensor 1871 detects the arrival of a train and the third position sensor 1873 detects the arrival of a train, the control device adjustment 1830 controls the traction substation 1840 to adjust the voltage of the first adjustable voltage output port 1841 and the second adjustable voltage output port 1842, so that the third voltage difference between the second voltage transformer 1862-1 located on the first side of the second electrical section 1882 in the second transition zone 1812 and the first voltage transformer 1861 located on the first electrical section 1881 in the first transition zone is less than the voltage threshold, and the fourth voltage difference between the second voltage transformer 1862-2 located on the second side of the second electrical section 1882 in the second transition zone 1812 and the third voltage transformer 1863 located on the third electrical section 1883 in the third transition zone is less than the voltage threshold. This allows train 1850 to flexibly pass through the first electrical section 1881 and the third electrical section 1883 without interruption of power, and train 1850 to flexibly pass through the first transition zone 1811 and the third transition zone 1813 without interruption of power.

[0448] For more information on the third and fourth voltage differences, please refer to [link / reference]. Figure 19A And its related descriptions.

[0449] Step 1923: If the second position sensor detects that a train has arrived and the third position sensor detects that a train has arrived, the control device controls the traction substation to adjust the voltage of the first adjustable voltage output port and the second adjustable voltage output port so that the difference in supply voltage on both sides of the second electrical section of the second transition zone (i.e., the second voltage difference below) is less than the voltage threshold and the difference in supply voltage on both sides of the third electrical section of the third transition zone (i.e., the fourth voltage difference below) is less than the voltage threshold.

[0450] In some embodiments, if the second position sensor 1872 detects the arrival of a train and the third position sensor 1873 detects the arrival of a train, the control device 1830 controls the traction substation 1840 to adjust the voltages of the first adjustable voltage output port 1841 and the second adjustable voltage output port 1842, so that the second voltage difference between the second voltage transformer 1862-1 and the second voltage transformer 1862-2 in the second transition zone 1812 is less than a voltage threshold, and the fourth voltage difference between the second voltage transformer 1862-2 located on the second side of the second electrical section 1882 in the second transition zone 1812 and the third voltage transformer 1863 located on the third electrical section 1883 in the third transition zone is less than a voltage threshold. This allows the train 1850 to flexibly pass through the second electrical section 1882 and the third electrical section 1883 without power interruption, and the train 1850 to flexibly pass through the second transition zone 1811 and the third transition zone 1813 without power interruption.

[0451] In some embodiments of this specification, the traction substation 1840 is controlled by a control device to adjust the voltage of the first adjustable voltage output port and the second adjustable voltage output port, thereby achieving a smooth transition of the power supply voltage and ensuring smooth operation when two trains simultaneously pass through any two of the first, second, and third transition zones. This not only improves the adaptability of the train power supply system to multi-train operation but also ensures the smoothness and safety of train operation, while simultaneously enhancing the adaptability and economy of the train power supply system.

[0452] Figure 20 This is a schematic diagram of the topology of a train power supply system according to other embodiments of this specification. It should be noted that the following embodiments are for illustrative purposes only and do not constitute a limitation thereof.

[0453] In some embodiments, such as Figure 20As shown, the first transition zone 2011 in the train power supply system 2000 may include a first electrical sub-section 2081, a first voltage transformer 2061, and a first position sensor 2071. The first voltage transformer 2061 and the first position sensor 2071 are located on the first side of the first electrical sub-section 2081 (i.e., on the left side of the first electrical sub-section 2081 in the figure). The second transition zone 2012 may include two second switches (e.g., second switch 2001 and second switch 2002), a second electrical sub-section 2082, a fourth electrical sub-section 2083, two second voltage transformers (e.g., second voltage transformer 2062-1 and second voltage transformer 2062-2), and three second position sensors (e.g., second position sensor 2072-1, second position sensor 2072-2, and second position sensor 2072-3). Two second switches (e.g., second switch 2001 and second switch 2002) are connected in parallel across the two ends of the second electrical section 2082 and the fourth electrical section 2083, respectively. The second voltage transformer 2062-1 and the second voltage transformer 2062-2 are respectively located on the first side of the second electrical section 2082 (i.e., the left side of the second electrical section 2082 in the figure) and the second side of the fourth electrical section 2083 (i.e., the right side of the fourth electrical section 2083 in the figure). The second position sensor 2072-1, the second position sensor 2072-2 and the second position sensor 2072-3 are respectively located on the first side of the second electrical section 2082 (i.e., the left side of the second electrical section 2082 in the figure), between the second electrical section 2082 and the fourth electrical section 2083, and on the second side of the fourth electrical section 2083 (i.e., the left side of the fourth electrical section 2083 in the figure). The third transition zone 2013 may include a third electrical section 2084, a third voltage transformer 2063, and a third position sensor 2073. The third voltage transformer 2063 and the third position sensor 2073 are respectively located on the second side (i.e., the right side of the third electrical section 2084 in the figure) and the first side (i.e., the left side of the third electrical section 2084 in the figure).

[0454] Transition zones (e.g., first transition zone, second transition zone, and third transition zone), power supply sections (e.g., first power supply section, second power supply section, third power supply section, and fourth power supply section), control devices, traction substations, first adjustable voltage output port, second adjustable voltage output port, train, voltage transformers (e.g., first voltage transformer, second voltage transformer, third voltage transformer, and fourth voltage transformer), position sensors (e.g., first position sensor, second position sensor, and third position sensor) and Figure 16The transition zone, power supply section, control device, traction substation, first adjustable voltage output port, second adjustable voltage output port, train, voltage transformer, and position sensor are similar and will not be described in detail here. The electrical sub-sections (e.g., first electrical sub-section, second electrical sub-section, third electrical sub-section) and... Figure 18 The electrical segmentation in the middle is similar, and will not be repeated here.

[0455] In some embodiments of this specification, by adding a fourth electrical section 2083, the power supply interval can be further subdivided, so that when multiple trains are running simultaneously, the power supply situation in different transition zones can be effectively managed and controlled, the fluctuation of the power supply voltage can be reduced, and the stability of train operation can be improved.

[0456] In some embodiments of this specification, by adding three second position sensors, the train's position information can be provided more accurately, which helps to respond quickly to changes in the train's position and adjust the power supply voltage in a timely manner.

[0457] In some embodiments of this specification, by introducing two second switches, flexible switching can be achieved between the second electrical section 2082 and the fourth electrical section 2083, allowing selection of a suitable power supply path according to the needs of train operation. This effectively avoids situations where the power supply voltage is too high or too low, ensuring the train passes stably through the second transition zone 2012.

[0458] In some embodiments, the control device 2030 controls the opening and closing of the second switch to achieve dynamic adjustment of the power supply line, which helps to optimize the power supply strategy, reduce energy consumption, and improve power supply efficiency when multiple trains are running simultaneously.

[0459] Control device 2030 may have a similar structure or components to control device 140; for more details, please refer to [link / reference]. Figure 1A , Figure 1B And its related descriptions.

[0460] In some embodiments of this specification, by configuring electrical sections, voltage transformers, and position sensors in the first, second, and third transition zones, the power supply voltage can be controlled more precisely, ensuring the continuity of power supply when the train passes through these transition zones. Furthermore, configuring multiple second switches in the second transition zone allows for precise detection of the train's position within the zone and dynamic control of the switch states based on the train's specific location, improving the flexibility and response speed of the train power supply system. Simultaneously, closing or opening the second switches at appropriate times allows for dynamic adjustment of the electrical section's connection status, ensuring the train power supply system remains stable while the train passes through the transition zone.

[0461] Figure 21A This is an exemplary flowchart illustrating the adjustment of the supply voltage according to some embodiments of this specification. Figure 21AThree trains passed by simultaneously Figure 20 The diagram shows the power supply voltage adjustment for the first transition zone 2011, the second transition zone 2012, and the third transition zone 2013. Figure 21A As shown, process 2110 may include the following steps. In some embodiments, process 2110 may be executed based on control device 2030.

[0462] Step 2111: The initial state of the second switch connected in parallel to the second electrical section is open, and the initial state of the second switch connected in parallel to the fourth electrical section is closed. The control device controls the traction substation to adjust the voltage of the first adjustable output port so that the difference in supply voltage on both sides of the first electrical section in the first transition zone (i.e., the third voltage difference) is always less than the voltage threshold.

[0463] More information about the control device adjustment 2030, traction substation 2040, first adjustable voltage output port 2041, second transition zone 2012, second electrical section 2082, fourth electrical section 2083, second voltage transformer 2062-1, and first voltage transformer 2061 can be found in [link to relevant documentation]. Figure 20 And its related descriptions.

[0464] In some embodiments, when three trains simultaneously pass through the first transition zone 2011, the second transition zone 2012, and the third transition zone 2013 respectively, the initial state of the second switch 2001 connected in parallel to the second electrical sub-section 2082 is open, and the initial state of the second switch 2002 connected in parallel to the fourth electrical sub-section 2083 is closed. The control device 2030 controls the traction substation 2040 to adjust the voltage of the first adjustable voltage output port 2041, so that the third voltage difference between the second voltage transformer 2062-1 located on the first side of the second electrical sub-section 2082 in the second transition zone 2012 and the first voltage transformer 2061 located in the first electrical sub-section in the first transition zone is less than the voltage threshold, thereby making the power supply sections at both ends of the fourth electrical sub-section 2083 electrically connected.

[0465] For more information on the third voltage difference and voltage threshold, please refer to [link / reference]. Figure 19A And its related descriptions.

[0466] Step 2112: In response to the first position sensor of the first train arriving at the first transition zone, the second position sensor of the second train arriving at the second transition zone located on the first side of the second electrical sub-section, and the third position sensor of the third train arriving at the third transition zone, the control device controls the traction substation 2040 to adjust the voltage of the second adjustable voltage output port so that the difference in power supply voltage on both sides of the third electrical sub-section of the third transition zone (i.e., the fourth voltage difference) is less than the voltage threshold. At the same time, the second switch connected in parallel to the second electrical sub-section is controlled to be closed and the second switch connected in parallel to the fourth electrical sub-section is controlled to be open.

[0467] In some embodiments, in response to the arrival of the first position sensor 2071 of the first transition zone 2011, the arrival of the second position sensor 2072-1 of the second transition zone 2012 located on the first side of the second electrical section 2082, and the arrival of the third position sensor 2073 of the third transition zone 2013, the control device 2030 controls the traction substation 2040 to adjust the voltage of the second adjustable voltage output port 2042, so that the second transition zone 2012 is located on the second side of the fourth electrical section 2083. When the fourth voltage difference between the second voltage transformer 2062-2 and the third voltage transformer 2063 located in the third electrical section of the third transition zone is less than the voltage threshold, and the second switch 2001 connected in parallel to the second electrical section 2082 is closed, the power supply sections at both ends of the second electrical section 2082 can be electrically connected; by controlling the second switch 2002 connected in parallel to the fourth electrical section 2083 to open, the power supply sections at both ends of the fourth electrical section 2083 can be disconnected, and all three trains can flexibly pass through the corresponding electrical sections.

[0468] For more information on the fourth voltage difference and voltage threshold, please refer to [link / reference]. Figure 19A And its related descriptions.

[0469] More information about the control device adjustment 2030, traction substation 2040, first adjustable voltage output port 2041, second transition zone 2012, second electrical section 2082, fourth electrical section 2083, second voltage transformer 2062-2, first voltage transformer 2061, and third voltage transformer 2063 can be found in [link to relevant documentation]. Figure 20 And its related descriptions.

[0470] Step 2113: In response to the first train passing through the first transition zone, the second train reaching the second position sensor located between the second and fourth electrical sub-sections in the second transition zone, and the third train passing through the third transition zone, the control device controls the traction substation to adjust the voltage of the second adjustable output port so that the fifth voltage difference between the second voltage transformer located on the second side of the fourth electrical sub-section in the second transition zone and the first voltage transformer is less than the voltage threshold. At the same time, the second switch connected in parallel to the second electrical sub-section is controlled to be open and the second switch connected in parallel to the fourth electrical sub-section is controlled to be closed, thereby allowing the second train to pass through the second transition zone.

[0471] The fifth voltage difference refers to the difference between the voltage values ​​measured by the second voltage transformer and the first voltage transformer, which are located on the second side of the fourth electrical section in the second transition zone.

[0472] In some embodiments, the fifth voltage difference is obtained in a similar manner to the third voltage difference, and will not be described again here.

[0473] For more information on the third voltage difference and voltage threshold, please refer to [link / reference]. Figure 19A And its related descriptions.

[0474] In some embodiments, the control device 2030 controls the traction substation 2040 to adjust the voltage of the second adjustable voltage output port 2042, so that the fifth voltage difference between the second voltage transformer 2062-2 and the first voltage transformer 2061, which are located on the second side of the fourth electrical section 2083 in the second transition zone 2012, is less than the voltage threshold.

[0475] In some embodiments, after all three trains have passed through the third electrical section 2084, the second switch 2001 connected in parallel to the second electrical section 2082 is controlled to be open and the second switch 2002 connected in parallel to the fourth electrical section 2083 is controlled to be closed, so as to restore the second switch 2001 and the second switch 2002 to their initial state. The adjustment principle is similar to step 2111, and will not be described in detail here.

[0476] In some embodiments of this specification, by controlling the voltage regulation when three trains simultaneously pass through their respective transition zones, it is ensured that the voltage difference across the transition zone is always less than the voltage threshold, thereby avoiding power supply instability or equipment damage caused by excessive voltage differences. Secondly, by controlling the adjustable voltage output port and switch status changes of the traction substation, the power supply connection between different electrical sections can be flexibly adjusted, enabling the train power supply system to maintain efficient operation under dynamically changing conditions. Furthermore, when multiple trains pass through the transition zone simultaneously, the voltage differences of each voltage transformer can be effectively coordinated, ensuring smooth switching between different power supply sections, avoiding electrical shocks, and further improving the safety and stability of the train power supply system.

[0477] Figure 21B This is an exemplary flowchart illustrating the adjustment of the supply voltage according to other embodiments of this specification. Figure 21B It shows three trains passing by simultaneously. Figure 20 The diagram shows the adjustment of the power supply voltage in the first transition zone 2011, the second transition zone 2012, and the third transition zone 2013. Figure 21B As shown, process 2120 may include the following steps. In some embodiments, process 2120 may be executed based on control device 2030.

[0478] Step 2121: The initial state of the second switch connected in parallel to the second electrical section is closed, and the initial state of the second switch connected in parallel to the fourth electrical section is open. The control device controls the traction substation to adjust the voltage of the second adjustable output port so that the fourth voltage difference between the second voltage transformer and the third voltage transformer, which are located on the second side of the fourth electrical section, is always less than the voltage threshold.

[0479] In some embodiments, when three trains simultaneously pass through the first transition zone 2011, the second transition zone 2012, and the third transition zone 2013 respectively, the initial state of the second switch 2001 connected in parallel to the second electrical substation 2082 is closed, and the initial state of the second switch 2002 connected in parallel to the fourth electrical substation 2083 is open. The control device 2030 controls the traction substation 2040 to adjust the voltage of the second adjustable voltage output port 2042, so that the fourth voltage difference between the second voltage transformer 2062-2 and the third voltage transformer 2063 located on the second side of the fourth electrical substation 2082 in the second transition zone 2012 is always less than the voltage threshold.

[0480] More information regarding the first transition zone 2011, the second transition zone 2012, the third transition zone 2013, the control device 2030, the traction substation 2040, the second adjustable voltage output port 2042, the second electrical section 2082, the second voltage transformer 2062-2, the third voltage transformer 2063, the fourth voltage difference, the voltage threshold, the second switches 2001 and 2002, and the fourth electrical section 2083 can be found in [link to relevant documentation]. Figure 20 And its related descriptions.

[0481] In some embodiments, by controlling the state of the second switch 2001 connected in parallel to the second electrical segment 2082 to be closed, and the state of the second switch 2002 connected in parallel to the fourth electrical segment 2083 to be open, the adjustment principle is the same as... Figure 21A Steps 2112 are similar and will not be repeated here.

[0482] Step 2122: In response to the first train arriving at the first position sensor in the first transition zone, the second train arriving at the second position sensor in the second transition zone located between the second and fourth electrical sub-sections, and the third train arriving at the third position sensor in the third transition zone, the control device controls the traction substation to adjust the voltage of the first adjustable output port so that the voltage difference between the first side of the second electrical sub-section in the second transition zone and the second side of the third electrical sub-section in the third transition zone is less than a voltage threshold. Then, the second switch connected in parallel to the fourth electrical sub-section is controlled to be closed and the second switch connected in parallel to the second electrical sub-section is controlled to be open. Next, the control device controls the traction substation to adjust the voltage of the first adjustable output port so that the voltage difference between the two sides of the first electrical sub-section in the first transition zone is less than a voltage threshold, thereby allowing the first, second, and third trains to simultaneously pass through the first, second, and third transition zones, respectively.

[0483] In some embodiments, in response to the arrival of the first position sensor 2071 of the first transition zone 2011 of the first train, the arrival of the second position sensor 2072-1 located on the first side of the second electrical section 2082 of the second transition zone 2012 of the second train, and the arrival of the third position sensor 2073 of the third transition zone 2013 of the third train, the control device 2030 controls the traction substation 2040 to adjust the voltage of the first adjustable voltage output port 2041. The sixth voltage difference between the second voltage transformer 2062-1 and the third voltage transformer 2063 located on the first side of the second electrical section 2083 of the second transition zone 2012 is less than a voltage threshold. This ensures that the area between the second electrical section 2083 and the fourth electrical section 2083 (i.e., the area where the second train is located) remains energized at all times. Then, the second switch 2002, connected in parallel to the fourth electrical sub-section 2083, is closed, allowing the power supply sections at both ends of the fourth electrical sub-section 2083 to be electrically connected, energizing the entire second transition zone 2012. Next, the second switch 2001, connected in parallel to the second electrical sub-section 2082, is opened, disconnecting the second transition zone 2012 from the second electrical sub-section 2082. The voltage in the area where the second train is located is regulated by the second adjustable voltage output port 2042. Then, the control device controls the traction substation 2040 to adjust the voltage of the first adjustable voltage output port 2041, ensuring that the voltage difference between the two sides of the first electrical sub-section 2081 in the first transition zone 2011 is less than the voltage threshold. At this point, the voltages on both sides of the first electrical sub-section 2081, the fourth electrical sub-section 2083, and the third electrical sub-section 2084 are equal, allowing all three trai...

Claims

1. A control method for a train power supply system, applied to a train power supply system, the train power supply system including an overhead contact line, a control device, and a traction substation, characterized in that, The method includes: When the train approaches the transition zone on the overhead contact line, the control device controls the traction substation to adjust the power supply voltage of the overhead contact line on at least one side of the transition zone, so that the difference in power supply voltage on both sides of the transition zone is less than a voltage threshold.

2. The method according to claim 1, characterized in that, The transition zone includes a first transition zone and a second transition zone. The target power supply section of the contact network connecting the traction substation is connected to a first adjacent section of the contact network through the first transition zone, and the target power supply section is connected to a second adjacent section of the contact network through the second transition zone. The method further includes: When the train approaches the first transition zone from the first adjacent section, the target power supply voltage of the target power supply section is adjusted by the control device so that the first difference between the target power supply voltage of the target power supply section and the first power supply voltage of the first adjacent section is less than the voltage threshold. When the train approaches the second transition zone from the target power supply section, the target power supply voltage of the target power supply section is adjusted by the control device so that the second difference between the target power supply voltage of the target power supply section and the second power supply voltage of the second adjacent section is less than the voltage threshold.

3. The method according to claim 2, characterized in that, The first transition zone includes at least one first switch and at least one first position sensor, and the second transition zone includes at least one second switch and at least one second position sensor; The position sensor is configured to detect the position information of the train; The method further includes: using the control device, based on the train's location information, the overhead contact line's power supply voltage information, and the switch status information of the first switch and / or the second switch, Controlling the opening and closing of the first switch and / or the second switch, and The traction substation is controlled to adjust the target power supply voltage of the target power supply section so that the first difference between the target power supply voltage of the target power supply section and the first power supply voltage of the first adjacent section is less than the voltage threshold, or the second difference between the target power supply voltage of the target power supply section and the second power supply voltage of the second adjacent section is less than the voltage threshold.

4. The method according to claim 3, characterized in that, The first transition zone consists of a first electrical section, a first switch, and two first position sensors. The first switch is connected in parallel to both ends of the first electrical section, and the two first position sensors are respectively disposed on the first side and the second side of the first electrical section. The second transition zone consists of a second electrical section, a second switch, and two second position sensors. The second switch is connected in parallel to both ends of the second electrical section, and the two second position sensors are respectively located on the first side and the second side of the second electrical section.

5. The method according to claim 4, characterized in that, The method further includes: In the initial state, both the first switch controlling the first transition zone and the second switch controlling the second transition zone are in the off state; When the first position sensor located on the first side of the first electrical substation detects the arrival of a train, the control device controls the traction substation to adjust the voltage so that the first difference between the target power supply voltage of the target power supply section and the first power supply voltage of the first adjacent section is less than the voltage threshold. When the second position sensor located on the first side of the second electrical substation detects the arrival of a train, the control device controls the traction substation to adjust the voltage so that the second difference between the target power supply voltage of the target power supply section and the second power supply voltage of the second adjacent section is less than the voltage threshold.

6. The method according to claim 3, characterized in that, The first transition zone consists of a first electrical segment, a third electrical segment, two first switches, and three first position sensors. The two first switches are connected in parallel at both ends of the first electrical segment and the third electrical segment, respectively. The three first position sensors are respectively located on the first side of the first electrical segment, between the first electrical segment and the third electrical segment, and on the second side of the third electrical segment. The second transition zone consists of a second electrical section, a second switch, and two second position sensors. The second switch is connected in parallel to both ends of the second electrical section, and the two second position sensors are respectively located on the first side and the second side of the second electrical section.

7. The method according to claim 6, characterized in that, The method further includes: In the initial state, the first switch connected in parallel to the first electrical segment in the first transition zone is opened, the first switch connected in parallel to the third electrical segment is closed, and the second switch in the second transition zone is opened; When the first position sensor located on the first side of the first electrical segmentation section and the second position sensor located on the first side of the second electrical segmentation section detect that no train has arrived at the same time... If the train reaches the first position sensor located on the first side of the first electrical substation, the control device controls the traction substation to adjust the voltage so that the first difference between the target power supply voltage of the target power supply section and the first power supply voltage of the first adjacent section is less than the voltage threshold. If the train reaches the second position sensor located on the first side of the second electrical substation, the control device controls the traction substation to adjust the voltage so that the second difference between the target power supply voltage of the target power supply section and the second power supply voltage of the second adjacent section is less than the voltage threshold.

8. The method according to claim 7, characterized in that, The method further includes: When a first position sensor located on a first side of the first electrical sub-section and a second position sensor located on a first side of the second electrical sub-section detect that a train is arriving simultaneously... The control device first controls the first switch in the first transition zone connected in parallel with the third electrical section to open, and then controls the first switch in the first electrical section to close. While controlling the first switch to open or close, the control device controls the voltage adjustment of the traction substation to make the second difference less than the voltage threshold, so that the first train passes through the first electrical section and the second train passes through the second transition zone. If the first train in the first transition zone reaches the first position sensor located between the first and third electrical substations, the control device controls the traction substation to adjust the voltage so that the first difference is less than the voltage threshold, thereby allowing the first train to pass through the first transition zone; and After the first train passes through the first transition zone, the control device first controls the first switch connected in parallel to the first electrical sub-section of the first transition zone to open, and then controls the first switch connected in parallel to the third electrical sub-section to close.

9. The method according to claim 3, characterized in that, The first transition zone consists of a first electrical section, a first switch, and two first position sensors. The first switch is connected in parallel to both ends of the first electrical section, and the two first position sensors are respectively disposed on the first side and the second side of the first electrical section. The second transition zone consists of a second electrical segment, a fourth electrical segment, two second switches, and three second position sensors. The two second switches are connected in parallel at both ends of the second electrical segment and the fourth electrical segment, respectively. The three second position sensors are respectively located on the first side of the second electrical segment, between the second electrical segment and the fourth electrical segment, and on the second side of the fourth electrical segment.

10. The method according to claim 9, characterized in that, The method further includes: In the initial state, the first switch controlling the first transition zone is open, the second switch of the second transition zone connected in parallel with the second electrical segment is open, and the second switch connected in parallel with the fourth electrical segment is closed; When the first position sensor located on the first side of the first electrical segmentation section and the second position sensor located on the first side of the second electrical segmentation section detect that no train has arrived at the same time... If the train reaches the first position sensor located on the first side of the first electrical substation, the control device controls the traction substation to adjust the voltage so that the first difference between the target power supply voltage of the target power supply section and the first power supply voltage of the first adjacent section is less than the voltage threshold. If the train reaches the second position sensor located on the first side of the second electrical substation, the control device controls the traction substation to adjust the voltage so that the second difference between the target power supply voltage of the target power supply section and the second power supply voltage of the second adjacent section is less than the voltage threshold.

11. The method according to claim 10, characterized in that, The method further includes: When the first position sensor located on the first side of the first electrical sub-section and the second position sensor located on the first side of the second electrical sub-section detect that a train is arriving simultaneously... The control device first controls the second switch connected in parallel to the fourth electrical section in the second transition zone to open, and then controls the second switch connected in parallel to the second electrical section to close. While controlling the second switch to open or close, the control device controls the voltage adjustment of the traction substation so that the first difference between the target power supply voltage of the target power supply section and the first power supply voltage of the first adjacent section is less than the voltage threshold. As a result, the first train located at the first position sensor on the first side of the first electrical sub-section passes through the first electrical sub-section, thus allowing the first train to pass through the first transition zone. At the same time, the second train located at the second position sensor on the first side of the second electrical sub-section passes through the second electrical sub-section without power interruption. When the second train passes through the second electrical substation and reaches the second position sensor located between the second and fourth electrical substations, the control device controls the traction substation to adjust the voltage so that the second difference between the target power supply voltage of the target power supply section and the second power supply voltage of the second adjacent section is less than the voltage threshold, thereby allowing the second train to pass through the second transition zone; and After the second train passes through the second transition zone, the control device first controls the second switch connected in parallel to the second electrical sub-section of the second transition zone to open, and then controls the second switch connected in parallel to the fourth electrical sub-section to close.

12. The method according to claim 3, characterized in that, The first transition zone consists of a first electrical segment, a third electrical segment, two first switches, and three first position sensors. The two first switches are connected in parallel at both ends of the first electrical segment and the third electrical segment, respectively. The three first position sensors are respectively located on the first side of the first electrical segment, between the first electrical segment and the third electrical segment, and on the second side of the third electrical segment. The second transition zone consists of a second electrical segment, a fourth electrical segment, two second switches, and three second position sensors. The two second switches are connected in parallel at both ends of the second electrical segment and the fourth electrical segment, respectively. The three second position sensors are respectively located on the first side of the second electrical segment, between the second electrical segment and the fourth electrical segment, and on the second side of the fourth electrical segment.

13. The method according to claim 12, characterized in that, The method further includes: In the initial state, the first switch connected in parallel to the first electrical segment in the first transition zone is opened and the first switch connected in parallel to the third electrical segment is closed; the second switch connected in parallel to the second electrical segment in the second transition zone is closed and the second switch connected in parallel to the fourth electrical segment is opened. When the first position sensor located on the first side of the first electrical sub-section and the second position sensor located between the second and fourth electrical sub-sections detect that no trains arrive simultaneously... If the train reaches the first position sensor located on the first side of the first electrical substation, the control device controls the traction substation to adjust the voltage so that the first difference between the target power supply voltage of the target power supply section and the first power supply voltage of the first adjacent section is less than the voltage threshold, thereby allowing the train to pass through the first transition zone. If the train moves from the second position sensor located on the first side of the second electrical sub-section to the second position sensor located between the second electrical sub-section and the fourth electrical sub-section, the control device controls the traction substation to adjust the voltage so that the second difference between the target power supply voltage of the target power supply section and the second power supply voltage of the second adjacent section is less than the voltage threshold, thereby allowing the train to pass through the fourth electrical sub-section and reach the second position sensor located on the second side of the fourth electrical sub-section, thus allowing the train to pass through the second transition zone.

14. The method according to claim 13, characterized in that, When the first position sensor located on the first side of the first electrical sub-section and the second position sensor located between the second and fourth electrical sub-sections detect the simultaneous arrival of a train... The control device first controls the first switch in the first transition zone connected in parallel with the third electrical section to open, and then controls the first switch in parallel with the first electrical section to close. While controlling the first switch, the control device controls the voltage adjustment of the traction substation so that the second difference between the target power supply voltage of the target power supply section and the second power supply voltage of the second adjacent section is less than the voltage threshold. At this time, the first train located in the first transition zone, which is the first position sensor located on the first side of the first electrical sub-section, passes through the first electrical sub-section in the first transition zone and reaches the first position sensor located between the first electrical sub-section and the third electrical sub-section. Meanwhile, the second train, located between the second electrical sub-section and the fourth electrical sub-section in the second transition zone, passes through the fourth electrical sub-section in the second transition zone to reach the second position sensor on the second side of the fourth electrical sub-section, thereby allowing the second train to pass through the second transition zone; When the first position sensor located between the first electrical substation and the third electrical substation detects the arrival of the first train, the control device controls the traction substation to adjust the voltage so that the first difference between the target power supply voltage of the target power supply section and the first power supply voltage of the first adjacent section is less than the voltage threshold. The first train then passes through the third electrical substation and reaches the first position sensor located on the second side of the third electrical substation, thereby allowing the first train to pass through the first transition zone. Furthermore, the control device first controls the first switch in the first transition zone connected in parallel to the first electrical segment to open, and then controls the first switch in the third electrical segment to close.

15. The method according to claim 12, characterized in that, The method further includes: In the initial state, the first switch connected in parallel to the first electrical segment in the first transition zone is closed and the first switch connected in parallel to the third electrical segment is opened; the second switch connected in parallel to the second electrical segment in the second transition zone is opened and the second switch connected in parallel to the fourth electrical segment is closed. When the first position sensor located between the first and third electrical sub-sections and the second position sensor located on the first side of the second electrical sub-section detect that no trains arrive simultaneously... Since the first transition zone is connected in parallel with the first switch of the first electrical sub-section is closed, the train passes through the first electrical sub-section and arrives at the first position sensor located between the first electrical sub-section and the third electrical sub-section. At this time, the control device controls the traction substation to adjust the voltage so that the first difference is less than the voltage threshold, thereby allowing the train to pass through the first transition zone. When the train reaches the second position sensor located on the first side of the second electrical substation, the control device controls the traction substation to adjust the voltage so that the second difference is less than the voltage threshold, thereby allowing the train to pass through the second electrical substation and reach the second position sensor located between the second electrical substation and the fourth electrical substation. Subsequently, due to the closure of the second switch connected in parallel to the fourth electrical sub-section, the train passes through the fourth electrical sub-section to reach the second position sensor located on the second side of the fourth electrical sub-section, thereby allowing the train to pass through the second transition zone.

16. The method according to claim 15, characterized in that, The method further includes: When the first position sensor located between the first and third electrical sub-sections and the second position sensor located on the first side of the second electrical sub-section detect that a train is arriving simultaneously... The control device first controls the second switch connected in parallel to the fourth electrical section in the second transition zone to open, and then controls the second switch connected in parallel to the second electrical section to close. While controlling the second switch, the control device controls the voltage adjustment of the traction substation to make the first difference less than the voltage threshold. At this time, the first train located at the first position sensor between the first electrical section and the third electrical section passes through the third electrical section and reaches the first position sensor located on the second side of the third electrical section, thereby allowing the first train to pass through the first transition zone. Meanwhile, the second train located at the second position sensor on the first side of the second electrical section in the second transition zone reaches the second position sensor located between the second electrical section and the fourth electrical section through the second electrical section in the second transition zone; When the second position sensor located between the second electrical sub-section and the fourth electrical sub-section detects the arrival of the second train, the control device controls the traction substation to adjust the voltage so that the second difference is less than the voltage threshold. The second train then passes through the fourth electrical sub-section and reaches the second position sensor located on the second side of the fourth electrical sub-section, thereby allowing the second train to pass through the second transition zone. Furthermore, the control device first controls the second switch connected in parallel to the second electrical segment in the second transition zone to open, and then controls the second switch connected in parallel to the fourth electrical segment to close.

17. The method according to claim 1, characterized in that, The overhead contact line includes a third adjacent section, a first transition zone, a first adjustable power supply section, a third electrical distribution section, a second adjustable power supply section, a fourth electrical distribution section, a third adjustable power supply section, a second transition zone, and a fourth adjacent section, connected in sequence. The traction substation includes a first adjustable voltage output terminal, a second adjustable voltage output terminal, and a third adjustable voltage output terminal, which are respectively connected to the first adjustable power supply section, the second adjustable power supply section, and the third adjustable power supply section on the contact wire. The train power supply system also includes a second traction substation and a third traction substation; The third adjacent section is powered by the second traction substation; The fourth adjacent section is powered by the third traction substation; The method further includes: When the train approaches the first transition zone or the second transition zone, the control device controls the traction substation to adjust the power supply voltage of the first adjustable power supply section or the third adjustable power supply section, so that the third difference between the power supply voltages on both sides of the first transition zone is less than the voltage threshold or the fourth difference between the power supply voltages on both sides of the second transition zone is less than the voltage threshold.

18. The method according to claim 17, characterized in that, The method further includes: When the train approaches the second adjustable power supply section from the first adjustable power supply section, the control device controls the traction substation to adjust the power supply voltage of the second adjustable power supply section, so that the fifth difference between the power supply voltage of the second adjustable power supply section and the first adjustable power supply section is less than the voltage threshold; or When the train approaches the third adjustable power supply section from the second adjustable power supply section, the control device controls the traction substation to adjust the power supply voltage of the second adjustable power supply section so that the sixth difference between the power supply voltage of the second adjustable power supply section and the third adjustable power supply section is less than the voltage threshold.

19. The method according to claim 17, characterized in that, The first transition zone includes a first electrical segment and a first sectionalizing switch connected in parallel on both sides of the first electrical segment; the second transition zone includes a second electrical segment and a second sectionalizing switch connected in parallel on both sides of the second electrical segment. The traction substation includes a first voltage regulating converter, a second voltage regulating converter, and a third voltage regulating converter. The first voltage regulating converter is connected to a first adjustable power supply section via a first control switch, the second voltage regulating converter is connected to a second adjustable power supply section via a second control switch, and the third voltage regulating converter is connected to a third adjustable power supply section via a third control switch. The method further includes: In response to a third difference between the supply voltages on both sides of the first transition zone being less than the voltage threshold, the control device controls the closing of the first segmented switch. In response to a fourth difference between the supply voltages on both sides of the second transition zone being less than the voltage threshold, the control device controls the closing of the second segment switch.

20. The method according to claim 19, characterized in that, In the initial state, the first control switch and the third control switch are controlled to be in the closed state; The control of closing the first segmented switch via the control device includes: Control the first voltage regulating converter to adjust the voltage of the first adjustable power supply section to match the voltage of the third adjacent section, and control the first segment switch to close. The control of closing the second segmented switch via the control device includes: The third voltage regulating converter is controlled to operate, so as to adjust the voltage of the third adjustable power supply section to be consistent with the voltage of the fourth adjacent section, and to control the second segment switch to close.

21. The method according to claim 19, characterized in that, The method further includes: When a train approaches the first side of the overhead contact line and passes through the first transition zone, approaching the second adjustable power supply section from the first adjustable power supply section, the control device controls the second control switch to be closed, and controls the second voltage regulating converter to work, so as to keep the voltage of the second adjustable power supply section and the first adjustable power supply section consistent. When the train approaches the third adjustable power supply section from the second adjustable power supply section, the control device controls the second control switch to be closed, and controls the second voltage regulating converter to work, so as to adjust the voltage of the second adjustable power supply section and the third adjustable power supply section to be consistent.

22. The method according to claim 17, characterized in that, The overhead contact system includes an upstream overhead contact system and a downstream overhead contact system, which are connected by a parallel switch. Trains on the upstream and downstream overhead contact systems run in opposite directions. Both the upstream and downstream contact networks include, in sequence, a third adjacent segment, a first transition zone, a first adjustable power supply segment, a third electrical distribution segment, a second adjustable power supply segment, a fourth electrical distribution segment, a third adjustable power supply segment, a second transition zone, and a fourth adjacent segment; wherein, The first transition zone includes a first electrical segment and a first sectionalizing switch connected in parallel on both sides of the first electrical segment; The second transition zone includes a second electrical section and a second sectionalizing switch connected in parallel on both sides of the second electrical section; The method further includes: When the upstream and downstream overhead contact lines simultaneously receive and dispatch trains, the control device controls the traction substation to adjust the voltage of the second adjustable power supply section, so that the voltage of the second adjustable power supply section is consistent with the voltage of the first adjustable power supply section or the third adjustable power supply section, so that the train passes through the electrical sub-sections at both ends of the second adjustable power supply section.

23. The method according to claim 22, characterized in that, The traction substation includes a fourth voltage regulating converter, a fifth voltage regulating converter, a sixth voltage regulating converter, and a seventh voltage regulating converter; The third electrical segment includes a downlink third electrical segment and an uplink third electrical segment, and the fourth electrical segment includes a downlink fourth electrical segment and an uplink fourth electrical segment; The fourth voltage regulating converter is connected to the first adjustable power supply section via an uplink first control switch and to the first adjustable power supply section via a downlink first control switch. The fifth voltage regulating converter is connected to the second adjustable power supply section via the second downstream control switch; The sixth voltage regulating converter is connected to the second adjustable power supply section via the second upward control switch; The seventh voltage regulating converter is connected to the third adjustable power supply section via the third control switch and the third control switch is connected to the third adjustable power supply section via the third control switch.

24. The method according to claim 23, characterized in that, The method further includes: Regarding the aforementioned upstream overhead contact line, In the initial state, the control device controls the seventh voltage regulating converter to operate, so as to keep the voltage of the third adjustable power supply segment of the upward movement consistent with that of the fourth adjacent segment of the upward movement, and closes the second segment switch of the upward movement; and the control device controls the fourth voltage regulating converter to operate, so as to keep the voltage of the first adjustable power supply segment of the upward movement consistent with that of the third adjacent segment of the upward movement, and closes the first segment switch of the upward movement. When the train approaches the second adjustable power supply section from the third adjustable power supply section, the control device controls the sixth voltage regulating converter to operate, so as to keep the voltage of the second adjustable power supply section and the third adjustable power supply section consistent. When the train approaches the first adjustable power supply section from the second adjustable power supply section, the control device controls the sixth voltage regulating converter to operate, so as to keep the voltage of the second adjustable power supply section from the first adjustable power supply section consistent with that of the first adjustable power supply section.

25. The method according to claim 23, characterized in that, The method further includes: For the aforementioned downstream overhead contact line, In the initial state, the control device controls the fourth voltage regulating converter to operate, so as to keep the voltage of the downlink first adjustable power supply section consistent with the voltage of the downlink third adjacent section, and the downlink first segment switch is closed; and the control device controls the seventh voltage regulating converter to operate, so as to keep the voltage of the downlink third adjustable power supply section consistent with the voltage of the downlink fourth adjacent section, and the downlink second segment switch is closed; When the train approaches the second adjustable power supply section from the first adjustable power supply section, the fifth voltage regulating converter is controlled by the control device to keep the voltage of the second adjustable power supply section and the first adjustable power supply section consistent. When the train approaches the third adjustable power supply section from the second adjustable power supply section, the fifth voltage regulating converter is controlled by the control device to keep the voltage of the second adjustable power supply section and the third adjustable power supply section consistent.

26. The method according to claim 1, characterized in that, The transition zone includes a first transition zone, a second transition zone, and a third transition zone; the contact wire is electrically segmented into a first power supply segment, a second power supply segment, a third power supply segment, and a fourth power supply segment; wherein... The first side of the first transition zone is connected to the first power supply segment, and the second side is connected to the second power supply segment; The first side of the second transition zone is connected to the second power supply section, and the second side is connected to the third power supply section; The first side of the third transition zone is connected to the third power supply section, and the second side is connected to the fourth power supply section; The method further includes: When the train approaches the first transition zone, the control device controls the traction substation to adjust the power supply voltage of the second power supply section so that the difference in power supply voltage on both sides of the first transition zone is less than the voltage threshold. When the train approaches the second transition zone, the control device controls the traction substation to adjust the power supply voltage of the second power supply section and the third power supply section so that the difference in power supply voltage on both sides of the second transition zone is less than the voltage threshold. When the train approaches the third transition zone, the control device controls the traction substation to adjust the power supply voltage of the third power supply section so that the difference in power supply voltage on both sides of the third transition zone is less than the voltage threshold.

27. The method according to claim 26, characterized in that, The traction substation includes a first adjustable voltage output port and a second adjustable voltage output port. The first adjustable voltage output port is connected to the second power supply section, and the second adjustable voltage output port is connected to the third power supply section. The method further includes: The power supply voltage of the second power supply segment is adjusted based on the first adjustable voltage output port; The power supply voltage of the third power supply segment is adjusted based on the second adjustable voltage output port.

28. The method according to claim 26, characterized in that, The first transition zone includes at least one first position sensor, the second transition zone includes at least one second position sensor, and the third transition zone includes at least one third position sensor; The position sensor is configured to detect the position information of the train; The method further includes: The control device, based on the train's position information and the power supply voltage information of the overhead contact line, controls the traction substation to adjust the power supply voltage of the overhead contact line on both sides of the first transition zone, the second transition zone, or the third transition zone, so that the difference in power supply voltage on both sides of the first transition zone, the second transition zone, or the third transition zone is less than the voltage threshold.

29. The method according to claim 28, characterized in that, The first transition zone includes a first electrical segment and a first position sensor, wherein the first position sensor is disposed on a first side of the first electrical segment; The second transition zone includes a second electrical segment and a second position sensor, the second position sensor being disposed on the first side of the second electrical segment; The third transition zone includes a third electrical segment and a third position sensor, the third position sensor being disposed on the first side of the third electrical segment.

30. The method according to claim 29, characterized in that, The method further includes: As the train passes through the first transition zone, the second transition zone, and the third transition zone in sequence... If the first position sensor detects that a train is arriving, the control device controls the traction substation to adjust the voltage of the first adjustable output port so that the difference in power supply voltage on both sides of the first electrical section in the first transition zone is less than the voltage threshold. If the second position sensor detects that a train has arrived, the control device controls the traction substation to adjust the voltage of the first adjustable voltage output port and the second adjustable voltage output port so that the difference in power supply voltage on both sides of the second electrical section of the second transition zone is less than the voltage threshold. If the third position sensor detects the arrival of a train, the control device controls the traction substation to adjust the voltage of the second adjustable voltage output port so that the difference in power supply voltage on both sides of the third electrical section of the third transition zone is less than the voltage threshold.

31. The method according to claim 29, characterized in that, The method further includes: When two trains simultaneously pass through any two of the first, second, and third transition zones... If the first position sensor detects that a train is arriving and the second position sensor detects that a train is arriving, the control device controls the traction substation to adjust the voltage of the first adjustable voltage output port and the second adjustable voltage output port so that the difference in supply voltage on both sides of the first electrical section of the first transition zone is less than the voltage threshold and the difference in supply voltage on both sides of the second electrical section of the second transition zone is less than the voltage threshold. If the first position sensor detects that a train is arriving and the third position sensor detects that a train is arriving, the control device controls the traction substation to adjust the voltage of the first adjustable voltage output port and the second adjustable voltage output port so that the difference in supply voltage on both sides of the first electrical section of the first transition zone is less than the voltage threshold and the difference in supply voltage on both sides of the third electrical section of the third transition zone is less than the voltage threshold. If the second position sensor detects that a train is arriving and the third position sensor detects that a train is arriving, the control device controls the traction substation to adjust the voltage of the first adjustable voltage output port and the second adjustable voltage output port so that the difference in supply voltage between the two sides of the second electrical section of the second transition zone is less than the voltage threshold, and the difference in supply voltage between the two sides of the third electrical section of the third transition zone is less than the voltage threshold.

32. The method according to claim 28, characterized in that, The first transition zone includes a first electrical segment and a first position sensor, wherein the first position sensor is disposed on a first side of the first electrical segment; The second transition zone includes two second switches, a second electrical segment, a fourth electrical segment, and three second position sensors. The two second switches are connected in parallel at both ends of the second electrical segment and the fourth electrical segment, respectively. The three second position sensors are respectively located on the first side of the second electrical segment, between the second electrical segment and the fourth electrical segment, and on the second side of the fourth electrical segment. The third transition zone includes a third electrical segment and a third position sensor, the third position sensor being disposed on the first side of the third electrical segment.

33. The method according to claim 32, characterized in that, The method further includes: The control device controls the opening and closing of the second switch.

34. The method according to claim 32, characterized in that, The method further includes: When the three trains arrive at the first transition zone, the second transition zone, and the third transition zone simultaneously, respectively. The initial state of the second switch connected in parallel to the second electrical section is open, and the initial state of the second switch connected in parallel to the fourth electrical section is closed. The control device controls the traction substation to adjust the voltage of the first adjustable voltage output port so that the difference in power supply voltage on both sides of the first electrical section in the first transition zone is always less than the voltage threshold. In response to the first position sensor of the first train arriving at the first transition zone, the second position sensor of the second train arriving at the second position sensor of the second transition zone located on the first side of the second electrical section, and the third position sensor of the third train arriving at the third transition zone, The control device controls the traction substation to adjust the voltage of the second adjustable output port so that the difference in power supply voltage on both sides of the third electrical section of the third transition zone is less than the voltage threshold. At the same time, the second switch connected in parallel to the second electrical section is controlled to be closed and the second switch connected in parallel to the fourth electrical section is controlled to be open. In response to the first train passing through the first transition zone, the second train arriving at the second position sensor located between the second and fourth electrical sub-sections in the second transition zone, and the third train passing through the third transition zone, The control device controls the traction substation to adjust the voltage of the second adjustable voltage output port so that the difference in supply voltage between the second side of the fourth electrical section of the second transition zone and the first side of the first electrical section of the first transition zone is less than the voltage threshold, thereby allowing the second train to pass through the second transition zone.

35. The method according to claim 32, characterized in that, The method further includes: When the three trains arrive at the first transition zone, the second transition zone, and the third transition zone simultaneously, respectively. The initial state of the second switch connected in parallel to the second electrical section is closed, and the initial state of the second switch connected in parallel to the fourth electrical section is open. The control device controls the traction substation to adjust the voltage of the second adjustable output port so that the difference in power supply voltage on both sides of the third electrical section in the third transition zone is always less than the voltage threshold. In response to the first train arriving at the first position sensor in the first transition zone, the second train arriving at the second position sensor in the second transition zone located between the second and fourth electrical sub-sections, and the third train arriving at the third position sensor in the third transition zone, The control device controls the traction substation to adjust the voltage of the first adjustable output port, so that the voltage difference between the first side of the second electrical section of the second transition zone and the second side of the third electrical section of the third transition zone is less than a voltage threshold. Then, the second switch connected in parallel to the fourth electrical segment is controlled to be closed, and the second switch connected in parallel to the second electrical segment is controlled to be open. Then, the control device controls the traction substation to adjust the voltage of the first adjustable output port so that the difference in power supply voltage on both sides of the first electrical section of the first transition zone is less than the voltage threshold. This allows the first, second, and third trains to pass through the first, second, and third transition zones simultaneously, respectively.

36. The method according to claim 32, characterized in that, The method further includes: When the three trains arrive at the first transition zone, the second transition zone, and the third transition zone simultaneously, respectively. The initial state of the second switch connected in parallel to the second electrical segment is open, and the initial state of the second switch connected in parallel to the fourth electrical segment is open; The control device controls the traction substation to adjust the voltage of the first adjustable voltage output port and the second adjustable voltage output port so that the difference in supply voltage on both sides of the first electrical section of the first transition zone is always less than the voltage threshold, and the difference in supply voltage on both sides of the third electrical section of the third transition zone is always less than the voltage threshold, so that the first train and the third train pass through the first transition zone and the third transition zone respectively. In response to the train arriving at the second transition zone, a second position sensor located on the first side of the second electrical sub-section controls the closing of the second switch connected in parallel to the second electrical sub-section via the control device. In response to the train arriving at the second transition zone, a second position sensor located between the second and fourth electrical sub-sections is used to control the second switch connected in parallel to the second electrical sub-section to open and the second switch connected in parallel to the fourth electrical sub-section to close, thereby allowing the second train to pass through the second transition zone.

37. The method according to claim 1, characterized in that, The target power supply section connecting the traction substation on the contact network is connected to the adjacent power supply section on the contact network through the transition zone. The adjacent power supply section is the power supply section corresponding to the traction substation adjacent to the traction substation. The transition zone includes a switch and an electrical segment; The method further includes: When the train approaches the transition zone from the adjacent power supply section of the overhead contact line, the control device controls the traction substation to adjust the power supply voltage of the overhead contact line on at least one side of the transition zone, so that the difference in power supply voltage on both sides of the transition zone is less than the voltage threshold. When the difference between the supply voltages on both sides of the transition zone is less than the voltage threshold, the control device controls the switching on and off of the transition zone and maintains it. as well as The control device controls the traction substation to adjust its output voltage so that the output voltage of the traction substation is equal to the output voltage of the adjacent traction substation.

38. The method according to claim 37, characterized in that, The adjacent traction substation includes a first voltage transformer, which is configured to detect a fourth supply voltage of the adjacent traction substation. The method further includes: The control device controls the traction substation to adjust the fifth power supply voltage so that the fifth power supply voltage is equal to the fourth power supply voltage of the adjacent traction substation; and controls the closing of the switch in the transition zone.

39. The method according to claim 37, characterized in that, After the switch in the transition zone is closed, the traction substation and the adjacent traction substation jointly supply power to the contact network between them.

40. A train power supply system, characterized in that, include: Overhead contact system, traction substation, at least two transition zones, and control equipment; The at least two transition zones are connected in series on the contact wire, and the traction substation has a voltage regulation function; When the train approaches the transition zone, the control device controls the traction substation to adjust the power supply voltage of the contact network on at least one side of the transition zone, so that the difference in power supply voltage on both sides of the transition zone is less than a voltage threshold.

41. The system according to claim 40, characterized in that, The at least two transition zones include a first transition zone and a second transition zone. The target power supply section of the contact network connecting the traction substation is connected to a first adjacent section of the contact network through the first transition zone, and the target power supply section is connected to a second adjacent section of the contact network through the second transition zone. The traction substation is configured to operate under the control of the control device. When the train approaches the first transition zone from the first adjacent section, the target power supply voltage of the target power supply section is adjusted so that the first difference between the target power supply voltage of the target power supply section and the first power supply voltage of the first adjacent section is less than the voltage threshold. When the train approaches the second transition zone from the target power supply section, the target power supply voltage of the target power supply section is adjusted so that the second difference between the target power supply voltage of the target power supply section and the second power supply voltage of the second adjacent section is less than the voltage threshold.

42. The system according to claim 41, characterized in that, The first transition zone includes at least one first switch and at least one first position sensor, and the second transition zone includes at least one second switch and at least one second position sensor; The position sensor is configured to detect the position information of the train; The control device is also configured to control the traction substation to adjust the power supply voltage based on the train's position information and the power supply voltage information of the overhead contact line, and to control the opening and closing of the first switch and / or the second switch.

43. The system according to claim 42, characterized in that, The first transition zone consists of a first electrical section, a first switch, and two first position sensors. The first switch is connected in parallel to both ends of the first electrical section, and the two first position sensors are respectively disposed on the first side and the second side of the first electrical section. The second transition zone consists of a second electrical section, a second switch, and two second position sensors. The second switch is connected in parallel to both ends of the second electrical section, and the two second position sensors are respectively located on the first side and the second side of the second electrical section.

44. The system according to claim 42, characterized in that, The first transition zone consists of a first electrical segment, a third electrical segment, two first switches, and three first position sensors. The two first switches are connected in parallel at both ends of the first electrical segment and the third electrical segment, respectively. The three first position sensors are respectively located on the first side of the first electrical segment, between the first electrical segment and the third electrical segment, and on the second side of the third electrical segment. The second transition zone consists of a second electrical section, a second switch, and two second position sensors. The second switch is connected in parallel to both ends of the second electrical section, and the two second position sensors are respectively located on the first side and the second side of the second electrical section.

45. The system according to claim 42, characterized in that, The first transition zone consists of a first electrical section, a first switch, and two first position sensors. The first switch is connected in parallel to both ends of the first electrical section, and the two first position sensors are respectively disposed on the first side and the second side of the first electrical section. The second transition zone consists of a second electrical segment, a fourth electrical segment, two second switches, and three second position sensors. The two second switches are connected in parallel at both ends of the second electrical segment and the fourth electrical segment, respectively. The three second position sensors are respectively located on the first side of the second electrical segment, between the second electrical segment and the fourth electrical segment, and on the second side of the fourth electrical segment.

46. ​​The system according to claim 42, characterized in that, The first transition zone consists of a first electrical segment, a third electrical segment, two first switches, and three first position sensors. The two first switches are connected in parallel at both ends of the first electrical segment and the third electrical segment, respectively. The three first position sensors are respectively located on the first side of the first electrical segment, between the first electrical segment and the third electrical segment, and on the second side of the third electrical segment. The second transition zone consists of a second electrical segment, a fourth electrical segment, two second switches, and three second position sensors. The two second switches are connected in parallel at both ends of the second electrical segment and the fourth electrical segment, respectively. The three second position sensors are respectively located on the first side of the second electrical segment, between the second electrical segment and the fourth electrical segment, and on the second side of the fourth electrical segment.

47. The system according to claim 40, characterized in that, The transition zone includes a first transition zone, a second transition zone, and a third transition zone; the contact wire is electrically segmented into a first power supply segment, a second power supply segment, a third power supply segment, and a fourth power supply segment; wherein... The first side of the first transition zone is connected to the first power supply segment, and the second side is connected to the second power supply segment; The first side of the second transition zone is connected to the second power supply section, and the second side is connected to the third power supply section; The first side of the third transition zone is connected to the third power supply section, and the second side is connected to the fourth power supply section; The traction substation is configured to operate under the control of the control device. When the train approaches the first transition zone, the power supply voltage of the second power supply section is adjusted so that the difference between the first power supply voltages on both sides of the first transition zone is less than the voltage threshold. As the train approaches the second transition zone, the power supply voltages of the second and third power supply sections are adjusted so that the difference between the second power supply voltages on both sides of the second transition zone is less than the voltage threshold. When the train approaches the third transition zone, the power supply voltage of the third power supply section is adjusted so that the difference between the third power supply voltages on both sides of the third transition zone is less than the voltage threshold.

48. The system according to claim 47, characterized in that, The traction substation includes a first adjustable voltage output port and a second adjustable voltage output port; wherein... The first adjustable output port is connected to the second power supply section and is configured to adjust the power supply voltage of the second power supply section. The second adjustable voltage output port is connected to the third power supply section and is configured to adjust the power supply voltage of the third power supply section.

49. The system according to claim 47, characterized in that, The first transition zone includes at least one first position sensor, the second transition zone includes at least one second position sensor, and the third transition zone includes at least one third position sensor; The position sensor is configured to detect the position information of the train; The control device is configured to control the traction substation to adjust the power supply voltage of the contact network on both sides of the first transition zone, the second transition zone, or the third transition zone based on the position information of the train and the power supply voltage information of the contact network, so that the difference between the power supply voltages on both sides of the first transition zone, the second transition zone, or the third transition zone is less than the voltage threshold.

50. The system according to claim 49, characterized in that, The first transition zone includes a first electrical segment and a first position sensor, wherein the first position sensor is disposed on a first side of the first electrical segment; The second transition zone includes a second electrical segment and a second position sensor, the second position sensor being disposed on the first side of the second electrical segment; The third transition zone includes a third electrical segment and a third position sensor, the third position sensor being disposed on the first side of the third electrical segment.

51. The system according to claim 49, characterized in that, The first transition zone includes a first electrical segment and a first position sensor, wherein the first position sensor is disposed on a first side of the first electrical segment; The second transition zone includes two second switches, a second electrical segment, a fourth electrical segment, and three second position sensors. The two second switches are connected in parallel at both ends of the second electrical segment and the fourth electrical segment, respectively. The three second position sensors are respectively located on the first side of the second electrical segment, between the second electrical segment and the fourth electrical segment, and on the second side of the fourth electrical segment. The third transition zone includes a third electrical segment and a third position sensor, both of which are located on the first side of the third electrical segment.

52. The system according to claim 51, characterized in that, The control device is also configured to control the opening and closing of the second switch.

53. The system according to claim 51, characterized in that, The overhead contact line includes a third adjacent section, a first transition zone, a first adjustable power supply section, a third electrical distribution section, a second adjustable power supply section, a fourth electrical distribution section, a third adjustable power supply section, a second transition zone, and a fourth adjacent section, connected in sequence. The traction substation includes a first adjustable voltage output terminal, a second adjustable voltage output terminal, and a third adjustable voltage output terminal, which are respectively connected to the first adjustable power supply section, the second adjustable power supply section, and the third adjustable power supply section on the contact wire. The train power supply system also includes a second traction substation and a third traction substation; The third adjacent section is powered by the second traction substation; The fourth adjacent section is powered by the third traction substation.

54. The system according to claim 53, characterized in that, The first transition zone includes a first electrical segment and a first sectionalizing switch connected in parallel on both sides of the first electrical segment; the second transition zone includes a second electrical segment and a second sectionalizing switch connected in parallel on both sides of the second electrical segment. The traction substation includes a first voltage regulating converter, a second voltage regulating converter, and a third voltage regulating converter. The first voltage regulating converter is connected to a first adjustable power supply section via a first control switch, the second voltage regulating converter is connected to a second adjustable power supply section via a second control switch, and the third voltage regulating converter is connected to a third adjustable power supply section via a third control switch.

55. The system according to claim 54, characterized in that, The control device is configured to: In the initial state, the first control switch and the third control switch are controlled to be in the closed state; The control of closing the first segmented switch via the control device includes: Control the first voltage regulating converter to adjust the voltage of the first adjustable power supply section to match the voltage of the third adjacent section, and control the first segment switch to close. The control of closing the second segmented switch via the control device includes: The third voltage regulating converter is controlled to operate, so as to adjust the voltage of the third adjustable power supply section to be consistent with the voltage of the fourth adjacent section, and to control the second segment switch to close.

56. The system according to claim 53, characterized in that, The overhead contact system includes an upstream overhead contact system and a downstream overhead contact system, which are connected by a parallel switch. Trains on the upstream and downstream overhead contact systems run in opposite directions. Both the upstream and downstream contact networks include, in sequence, a third adjacent segment, a first transition zone, a first adjustable power supply segment, a third electrical distribution segment, a second adjustable power supply segment, a fourth electrical distribution segment, a third adjustable power supply segment, a second transition zone, and a fourth adjacent segment; wherein, The first transition zone includes a first electrical segment and a first sectionalizing switch connected in parallel on both sides of the first electrical segment; The second transition zone includes a second electrical segment and a second sectionalizing switch connected in parallel on both sides of the second electrical segment.

57. The system according to claim 56, characterized in that, The traction substation includes a fourth voltage regulating converter, a fifth voltage regulating converter, a sixth voltage regulating converter, and a seventh voltage regulating converter; The third electrical segment includes a downlink third electrical segment and an uplink third electrical segment, and the fourth electrical segment includes a downlink fourth electrical segment and an uplink fourth electrical segment; The fourth voltage regulating converter is connected to the first adjustable power supply section via an uplink first control switch and to the first adjustable power supply section via a downlink first control switch. The fifth voltage regulating converter is connected to the second adjustable power supply section via the second downstream control switch; The sixth voltage regulating converter is connected to the second adjustable power supply section via the second upward control switch; The seventh voltage regulating converter is connected to the third adjustable power supply section via the third control switch and the third control switch is connected to the third adjustable power supply section via the third control switch.

58. The system according to claim 40, characterized in that, The target power supply section of the overhead contact line connecting the traction substation and the adjacent power supply section on the overhead contact line are connected through the transition zone. The adjacent power supply section is the power supply section corresponding to the traction substation adjacent to the traction substation. The transition zone includes a switch and an electrical sub-section.

59. A train power supply system, characterized in that, include: A first traction substation, a second traction substation, and a transition area located between the first traction substation and the second traction substation; wherein the first traction substation does not have voltage regulation function, and the second traction substation does have voltage regulation function. The first traction substation and the second traction substation are arranged alternately.

60. The system according to claim 59, characterized in that, The transition region includes: At least one electrical segment and at least one switch connected in parallel across the two ends of the electrical segment; At least two position sensors are disposed between or on both sides of the at least one electrical segment.

61. The system according to claim 60, characterized in that, The transition region includes: Two electrical sub-sections and two switches connected in parallel at both ends of each electrical sub-section, the two electrical sub-sections being connected by a contact wire; Three position sensors are respectively installed on the left side of the two electrical sub-segments, between the two electrical sub-segments, and on the right side of the two electrical sub-segments.

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