Electrified railway arc extinction automatic neutral section passing system and control method thereof

Abstract

The invention discloses an electrified railway arc extinction automatic neutral section passing system and a control method thereof. The electrified railway arc extinction automatic neutral section passing system comprises an electric neutral section, a thyristor switch device, a follow current resistor, a vacuum switch device, a train position recognition device and a control unit. The electric split-phase comprises a sectionalizer I, a neutral section and a sectionalizer II; the thyristor switch device is connected in parallel to two ends of the sectionalizer I and the sectionalizer II; and the vacuum switch device is connected in parallel to the two ends of the sectionalizer I, or the vacuum switch device is connected in parallel to the two ends of the sectionalizer II, or the vacuum switch device is connected in parallel to the two ends of the sectionalizer I and the sectionalizer II. The method can effectively reduce or eliminate the arc discharge phenomenon caused by the ground control automatic passing neutral section device based on the thyristor switch in the process that the train pantograph passes through the sectionalizer of the electric split phase, and can effectively suppress the transient electrical process and the overvoltage and overcurrent problems.

Description

Technical Field

[0001] The invention relates to the technical field of electrified railway power supply, and in particular to automatic phase-over and arc-extinguishing technology for ground control of electrified railway. Background Art

[0002] my country's electrified railways generally use single-phase industrial frequency AC system. In order to reduce the negative sequence impact on the power grid, electrified railways often adopt the scheme of rotating phase sequence and phase-divided power supply. The adjacent power supply sections at the phase-divided zone are separated by air or insulators, and a neutral section is set in the middle, which is referred to as electrical phase separation or phase separation. The neutral section is a non-electric area.

[0003] When a train passes through an electric phase-splitting area without electricity, the power will be cut off, the speed will be affected, the train will slow down, or even break down, affecting the line's transportation capacity. To this end, people have developed a variety of ground-controlled automatic phase-splitting devices to try to reduce the power-off time of the train and thus reduce the impact on the train's running speed. The earliest one was based on a vacuum switch, and later developed into a thyristor switch. The patent "A system and method for automatic phase-splitting in a sub-district ZL2016108442023" further proposed a technical solution for uninterrupted power supply to the train. As an example: a single thyristor with a rated voltage of 6500V is selected, and considering redundancy, 24 thyristors are used in series. The voltage drop of a single thyristor on-state tube is generally between 1.2V and 1.5V, and the total tube voltage drop is between 28.8V and 36V.

[0004] However, it is noted that arcing may occur during the operation of the ground-controlled automatic phase-shifting device based on thyristor switches. The reason is that there is a tube voltage drop when the thyristor switch is forward-conducted. This tube voltage drop is bypassed for a short time when the train pantograph passes through the sectionalizer of the electrical phase-splitting device. When the pantograph leaves the sectionalizer, the tube voltage drop is restored, causing the sectionalizer and the thyristor switch to be shunted. This will cause arcing at both ends of the sectionalizer. Long-term accumulation will burn the sectionalizer and related wires, leading to accidents.

[0005] This application proposes a solution that can effectively eliminate the arcing phenomenon caused by the ground-controlled automatic phase-shifting device based on thyristor switches during the process of the train pantograph passing through the electrical phase-shifting sectioner, and can effectively suppress transient electrical processes and overvoltage and overcurrent, and is suitable for all types of trains. Summary of the invention

[0006] The present invention provides an electric railway arc extinguishing automatic phase-passing system and a control method thereof, which can effectively reduce or eliminate the arcing phenomenon caused by the ground-controlled automatic phase-passing device based on thyristor switches when the train pantograph passes through the electric phase-splitting sectioner, and can effectively suppress transient electrical processes and overvoltage and overcurrent problems.

[0007] The first object of the present invention is to provide an electric railway arc extinguishing automatic phase-splitting system, including an electric phase splitter, a thyristor switch device, a freewheeling resistor, a vacuum switch device, a train position identification device, and a control unit; the electric phase splitter includes a segmenter 1, a neutral segment, and a segmenter 2; the power supply arm 1 of the electric railway is connected to one end of the neutral segment through the segmenter 1, and the power supply arm 2 of the electric railway is connected to the other end of the neutral segment through the segmenter 2; the thyristor switch device is connected in parallel at both ends of the segmenter 1 and the segmenter 2, and the freewheeling resistor is connected between the neutral segment and the grounding wire; the vacuum switch device is connected in parallel at both ends of the segmenter 1, or the vacuum switch device is connected in parallel at both ends of the segmenter 2, or the vacuum switch device is connected in parallel at both ends of the segmenter 1 and the segmenter 2.

[0008] The present invention utilizes the arc extinguishing capability of the vacuum switch device and cooperates with the thyristor switch to reduce or eliminate the arc caused by the train pantograph in the process of passing through the first or second sectionalizer of the electric phase separation.

[0009] Furthermore, the triggering end of the thyristor switch device, the operating end of the vacuum switch device, and the signal end of the train position identification device are all connected to the control unit.

[0010] Furthermore, the thyristor switch device comprises a thyristor switch 1 and a thyristor switch 2, wherein the thyristor switch 1 is connected in parallel at both ends of the sectionalizer 1, and the thyristor switch 2 is connected in parallel at both ends of the sectionalizer 2.

[0011] Furthermore, the train position identification device includes train identifier 1, train identifier 2, and train identifier 3; train identifier 1 is provided at the end of power supply arm 1 near the section divider, train identifier 2 is provided on the neutral section, and train identifier 3 is provided at the end of power supply arm 2 near the section divider 2.

[0012] Furthermore, the control unit controls the turning on or off of the thyristor switch device and the closing or disconnecting of the vacuum switch device according to the output signal of the train position identification device.

[0013] Furthermore, when no train passes through the electrical phase separation, the thyristor switch device is in an off state and the vacuum switch device is in an off state.

[0014] Furthermore, when no train passes, the signal output signals of the signal terminals of the train identifier 1, train identifier 2, and train identifier 3 are 0; when a train passes, the signal output signals of the signal terminals of the train identifier 1, train identifier 2, and train identifier 3 are 1;

[0015] Preferably, the vacuum switch device includes a vacuum switch 1, which is connected in parallel at both ends of a sectioner 1; the control unit controls the on or off of the thyristor switch 1 and the closing or disconnection of the vacuum switch 1 according to the output signal of the train identifier 1.

[0016] The present invention utilizes the arc extinguishing capability of a vacuum switch and cooperates with a thyristor switch to reduce or eliminate the arc when the train pantograph is separated from a power supply arm, thereby realizing one-way arc extinguishing.

[0017] Preferably, the vacuum switch device includes vacuum switch 2, which is connected in parallel at both ends of section divider 2; the control unit controls the on or off of thyristor switch 2 and the closing or disconnection of vacuum switch 2 according to the output signal of train identifier 3.

[0018] The present invention utilizes the arc extinguishing capability of the second vacuum switch and cooperates with the second thyristor switch to reduce or eliminate the arc when the train pantograph is separated from the second power supply arm, thereby realizing one-way arc extinguishing.

[0019] Preferably, the vacuum switch device includes vacuum switch 1 and vacuum switch 2, the vacuum switch 1 is connected in parallel at both ends of sectioner 1, and the vacuum switch 2 is connected in parallel at both ends of sectioner 2; the control unit controls the on or off of thyristor switch 1 and the closing or disconnection of vacuum switch 1 according to the output signal of train identifier 1, and controls the on or off of thyristor switch 2 and the closing or disconnection of vacuum switch 2 according to the output signal of train identifier 3.

[0020] The present invention utilizes the arc extinguishing capability of vacuum switch 1 and cooperates with thyristor switch 1 to reduce or eliminate the arc when the train pantograph is separated from power supply arm 1; and utilizes the arc extinguishing capability of vacuum switch 2 and cooperates with thyristor switch 2 to reduce or eliminate the arc when the train pantograph is separated from power supply arm 2, thereby realizing bidirectional arc extinguishing.

[0021] The second object of the present invention is to provide a control method for one-way arc extinguishing using the above-mentioned electric railway arc extinguishing automatic over-phase system.

[0022] When the train travels in one direction, from power supply arm one through the neutral section to power supply arm two, the control method steps are as follows:

[0023] A. If the output signal of the signal terminal of the train identifier is 1, that is, the train identifier senses that the train is moving from the power supply arm to the section divider, the control unit turns on the thyristor switch, so that the neutral section is directly connected to the power supply arm, and the control unit then closes the vacuum switch;

[0024] B. If the output signal of the second signal terminal of the train identifier is 1, that is, when the train enters the neutral section from the power supply arm 1 through the sectionalizer 1, the control unit first disconnects the vacuum switch 1, then turns off the thyristor switch 1, and then turns on the thyristor switch 2, that is, the neutral section is disconnected from the power supply arm 1 and directly connected to the power supply arm 2;

[0025] C. If the output signal of the signal terminal of train identifier 3 is 1, that is, when the train enters power supply arm 2 from the neutral section through section divider 2, the control unit turns off thyristor switch 2, that is, the neutral section is disconnected from power supply arm 2; then the signal terminals of train identifier 1, train identifier 2, and train identifier 3 are reset to 0; and the power supply switching from power supply arm 1 to power supply arm 2 is completed.

[0026] When the train travels in one direction, from the power supply arm 2 through the neutral section to the power supply arm 1, the control method steps are as follows:

[0027] A. If the output signal of the signal terminal 3 of the train identifier is 1, that is, the train identifier 3 senses that the train is moving from the power supply arm 2 to the section divider 2, the control unit turns on the thyristor switch 2, so that the neutral section is directly connected to the power supply arm 2, and the control unit then turns on the vacuum switch 2;

[0028] B. If the output signal of the second signal terminal of the train identifier is 1, that is, when the train enters the neutral section from the second power supply arm through the second section divider, the control unit first disconnects the second vacuum switch, then turns off the second thyristor switch, and then turns on the first thyristor switch, that is, the neutral section is disconnected from the second power supply arm and directly connected to the first power supply arm;

[0029] C. If the output signal of the signal end of train identifier 1 is 1, that is, the train enters power supply arm 1 from the neutral section through sectioner 1, the control unit turns off thyristor switch 1, that is, the neutral section is disconnected from power supply arm 1; then the signal end signals of train identifier 1, train identifier 2, and train identifier 3 are reset to 0; completing the power supply switching from power supply arm 2 to power supply arm 1.

[0030] The third object of the present invention is to provide a control method for bidirectional arc extinguishing using the above-mentioned electric railway arc extinguishing automatic over-phase system.

[0031] When the train travels in both directions, from the power supply arm one direction through the neutral section to the power supply arm two direction, the control method steps are as follows:

[0032] A. If the output signal of the signal terminal of the train identifier is 1, that is, the train identifier senses that the train is moving from the power supply arm to the section divider, the control unit turns on the thyristor switch, so that the neutral section is directly connected to the power supply arm, and the control unit then closes the vacuum switch;

[0033] B. If the output signal of the second signal terminal of the train identifier is 1, that is, when the train enters the neutral section from the power supply arm 1 through the sectionalizer 1, the control unit first disconnects the vacuum switch 1, then turns off the thyristor switch 1, and then turns on the thyristor switch 2, that is, the neutral section is disconnected from the power supply arm 1 and directly connected to the power supply arm 2;

[0034] C. If the output signal of the signal terminal of the train identifier 3 is 1, that is, when the train enters the power supply arm 2 from the neutral section through the sectionalizer 2, the control unit turns off the thyristor switch 2, that is, the neutral section is disconnected from the power supply arm 2; then the signal terminals of the train identifier 1, train identifier 2, and train identifier 3 are reset to 0; and the power supply switching from the power supply arm 1 to the power supply arm 2 is completed;

[0035] When the vehicle passes through the neutral section from the power supply arm 2 to the power supply arm 1, the control method steps are as follows:

[0036] A. If the output signal of the signal terminal 3 of the train identifier is 1, that is, the train identifier 3 senses that the train is moving from the power supply arm 2 to the section divider 2, the control unit turns on the thyristor switch 2, so that the neutral section is directly connected to the power supply arm 2, and the control unit then turns on the vacuum switch 2;

[0037] B. If the output signal of the second signal terminal of the train identifier is 1, that is, when the train enters the neutral section from the second power supply arm through the second section divider, the control unit first disconnects the second vacuum switch, then turns off the second thyristor switch, and then turns on the first thyristor switch, that is, the neutral section is disconnected from the second power supply arm and directly connected to the first power supply arm;

[0038] C. If the output signal of the signal end of train identifier 1 is 1, that is, the train enters power supply arm 1 from the neutral section through sectioner 1, the control unit turns off thyristor switch 1, that is, the neutral section is disconnected from power supply arm 1; then the signal end signals of train identifier 1, train identifier 2, and train identifier 3 are reset to 0; completing the power supply switching from power supply arm 2 to power supply arm 1.

[0039] The working principle of the present invention is:

[0040] The process of the ground-controlled automatic phase-passing device when the train pantograph passes through the sectionalizer of the electrical phase-splitting is a conversion process between different branches, which is called the switching process. There is a tube voltage drop when the thyristor switch (equipped with a freewheeling resistor) is forward-conducted. The more thyristors are connected in series in the ground-controlled automatic phase-passing device based on the thyristor switch, the greater the tube voltage drop. When the vacuum switch is closed, the pressure difference between its moving contact and static contact is 0; if the tube voltage drop during the forward conduction of the thyristor switch cannot be handled well, it will cause arcing in the sectionalizer. The reason is that the tube voltage drop is short-term bypassed when the train pantograph passes through the sectionalizer of the electrical phase-splitting. At this time, the voltage difference between the two ends of the thyristor is 0, and the train load current all passes through the sectionalizer branch. When the pantograph leaves the sectionalizer, the tube voltage drop must be restored, causing the sectionalizer branch and the thyristor switch branch to start shunting, and the current at the end of the sectionalizer is Forced to cut off, this will cause arcing at both ends of the sectionalizer of the sectionalizer branch. This arcing needs to be extinguished naturally. Long-term accumulation will burn the sectionalizer and related wires, causing an accident. Therefore, a vacuum switch is added to form a new parallel branch, and then the arc extinguishing ability of the vacuum switch is used in conjunction with the thyristor switch. When the pantograph passes through the sectionalizer, the vacuum switch and the thyristor switch are both closed, the sectionalizer has been bypassed by the vacuum switch, and the pressure difference at both ends of the sectionalizer is 0. Therefore, the pantograph passing through the sectionalizer will not cause arcing. After the pantograph leaves the sectionalizer, the vacuum switch uses its arc extinguishing ability to cut off the shunt of the vacuum switch branch, and all the load current is transferred to the thyristor switch branch, thus successfully completing the switching process and allowing the train to pass smoothly.

[0041] At the same time, the life of the thyristor switch has almost nothing to do with the number of interruptions and the breaking current. In other words, within the rated parameters, the number of interruptions and the breaking current of the thyristor switch are almost unrestricted, and the number of interruptions (life) of the vacuum switch is relatively limited and is related to the load current to be interrupted. The larger the current, the shorter the life and the fewer the available breaking times. Therefore, the thyristor switch and the vacuum switch can be optimized. The thyristor switch is used to interrupt the load current, and the vacuum switch is used to complete the interruption of small currents in the switching process, so that the life of the vacuum switch can be best utilized and the economic optimization of the entire life cycle can be achieved.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] 1. The thyristor switch and vacuum switch work together to eliminate the arcing phenomenon in the switching process, allowing the train to pass through the electrical phase smoothly and ensure the normal performance of the train.

[0044] 2. Use thyristor switches to interrupt load current and vacuum switches to interrupt small currents during the switching process, so that the life of the vacuum switch can be maximized (reaching the mechanical life) and the economic optimization of the entire life cycle can be achieved.

[0045] 3. Suppress the transient process, overvoltage and overcurrent that may be generated during the switching process to ensure safe operation of the system.

[0046] Fourth, the present invention has advanced technology, superior performance and is easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1a This is a schematic diagram of the first structure of one-way arc extinguishing in Example 1 of the present invention.

[0048] Figure 1b It is a schematic diagram of the second structure of the one-way arc extinguishing in Example 1 of the present invention.

[0049] Figure 2 It is a schematic diagram of the structure of bidirectional arc extinguishing in Example 2 of the present invention.

[0050] Figure 3 It is a schematic diagram of a control unit of the present invention. DETAILED DESCRIPTION

[0051] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0052] Example 1

[0053] like Figure 1a As shown, an electric railway one-way arc extinguishing automatic phase-passing system, the automatic phase-passing system is arranged in the electric railway phase separation, the electric phase separation includes a segmenter S1, a neutral segment A0 and a segmenter S2; the power supply arm A1 of the electric railway is connected to one end of the neutral segment A0 through the segmenter S1, and the power supply arm A2 of the electric railway is connected to the other end of the neutral segment A0 through the segmenter S2.

[0054] The thyristor switch device includes a thyristor switch 1 T1 and a thyristor switch 2 T2, wherein the thyristor switch 1 T1 is connected in parallel to both ends of the segmenter 1 S1, and the thyristor switch 2 T2 is connected in parallel to both ends of the segmenter 2 S2. The freewheeling resistor R is connected between the neutral segment A0 and the grounding wire.

[0055] The vacuum switch device comprises a vacuum switch K1, and the vacuum switch K1 is connected in parallel at both ends of a sectioner S1.

[0056] When no train passes through the electrical phase separation, the thyristor switch device is in the off state and the vacuum switch device is in the off state.

[0057] The train position identification device includes a train identifier P1, a train identifier P2, and a train identifier P3; a train identifier P1 is provided at the end of a power supply arm A1 near a section divider S1, a train identifier P2 is provided on the neutral section A0, and a train identifier P3 is provided at the end of a power supply arm A2 near a section divider S2.

[0058] When no train passes, the signal end output signal of the train identifier P1, train identifier P2, and train identifier P3 is 0; when a train passes, the signal end output signal of the train identifier P1, train identifier P2, and train identifier P3 is 1.

[0059] The triggering ends of the thyristor switch 1 T1 and the thyristor switch 2 T2, the operating end of the vacuum switch 1 K1, and the signal ends of the train identifier 1 P1, the train identifier 2 P2, and the train identifier 3 P3 are all connected to the control unit CU.

[0060] The control unit CU controls the on / off of the thyristor switch T1 and the closing / opening of the vacuum switch K1 according to the output signal of the train identifier P1.

[0061] This embodiment utilizes the arc extinguishing capability of the vacuum switch K1 and cooperates with the thyristor switch T1 to reduce or eliminate the arc when the train pantograph is separated from the power supply arm A1.

[0062] In this embodiment, when the train travels in one direction, from the power supply arm 1 A1 direction through the neutral section A0 to the power supply arm 2 A2 direction, the control method steps are as follows:

[0063] A. If the output signal of the signal terminal of the train identifier P1 is 1, that is, the train identifier P1 senses that the train L is moving from the power supply arm A1 to the section divider S1, the control unit CU turns on the thyristor switch T1, so that the neutral section A0 is directly connected to the power supply arm A1, and the control unit CU then turns on the vacuum switch K1;

[0064] B. If the output signal of the signal terminal P2 of the train identifier 2 is 1, that is, when the train L enters the neutral section A0 from the power supply arm 1 A1 through the section divider 1 S1, the control unit CU first disconnects the vacuum switch 1 K1, then turns off the thyristor switch 1 T1, and then turns on the thyristor switch 2 T2, that is, the neutral section A0 is disconnected from the power supply arm 1 A1 and directly connected to the power supply arm 2 A2;

[0065] C. If the output signal of the signal terminal P3 of the train identifier 3 is 1, that is, when the train enters the power supply arm 2 A2 from the neutral section A0 through the section divider 2 S2, the control unit CU turns off the thyristor switch 2 T2, that is, the neutral section A0 is disconnected from the power supply arm 2 A2; then the signal terminal signals of the train identifier 1 P1, the train identifier 2 P2, and the train identifier 3 P3 are reset to 0; the power supply switching from the power supply arm 1 A1 to the power supply arm 2 A2 is completed.

[0066] like Figure 1bAs shown, an electric railway one-way arc extinguishing automatic phase-passing system, the automatic phase-passing system is arranged in the electric railway phase separation, the electric phase separation includes a segmenter S1, a neutral segment A0 and a segmenter S2; the power supply arm A1 of the electric railway is connected to one end of the neutral segment A0 through the segmenter S1, and the power supply arm A2 of the electric railway is connected to the other end of the neutral segment A0 through the segmenter S2.

[0067] The thyristor switch device includes a thyristor switch 1 T1 and a thyristor switch 2 T2, wherein the thyristor switch 1 T1 is connected in parallel to both ends of the segmenter 1 S1, and the thyristor switch 2 T2 is connected in parallel to both ends of the segmenter 2 S2. The freewheeling resistor R is connected between the neutral segment A0 and the grounding wire.

[0068] The vacuum switch device comprises a second vacuum switch K2, and the second vacuum switch K2 is connected in parallel at both ends of the second section divider S2.

[0069] When no train passes through the electrical phase separation, the thyristor switch device is in the off state and the vacuum switch device is in the off state.

[0070] The train position identification device includes a train identifier P1, a train identifier P2, and a train identifier P3; a train identifier P1 is provided at the end of a power supply arm A1 near a section divider S1, a train identifier P2 is provided on the neutral section A0, and a train identifier P3 is provided at the end of a power supply arm A2 near a section divider S2.

[0071] When no train passes, the signal end output signal of the train identifier P1, train identifier P2, and train identifier P3 is 0; when a train passes, the signal end output signal of the train identifier P1, train identifier P2, and train identifier P3 is 1.

[0072] The triggering ends of the thyristor switch 1 T1 and the thyristor switch 2 T2, the operating end of the vacuum switch 2 K2, and the signal ends of the train identifier 1 P1, the train identifier 2 P2, and the train identifier 3 P3 are all connected to the control unit CU.

[0073] The control unit CU controls the on or off of the thyristor switch 2 T2 and the closing or disconnection of the vacuum switch 2 K2 according to the output signal of the train identifier 3 P3.

[0074] This embodiment utilizes the arc extinguishing capability of the vacuum switch K2 and cooperates with the thyristor switch T2 to reduce or eliminate the arc when the train pantograph is separated from the power supply arm A2.

[0075] In this embodiment, when the train travels in one direction, from the power supply arm 2 A2 direction through the neutral section A0 to the power supply arm 1 A1 direction, the control method steps are as follows:

[0076] A. If the output signal of the signal terminal P3 of the train identifier is 1, that is, when the train identifier P3 senses that the train L is moving from the power supply arm A2 to the section divider S2, the control unit CU turns on the thyristor switch T2, so that the neutral section A0 is directly connected to the power supply arm A2, and the control unit CU then turns on the vacuum switch K2;

[0077] B. If the output signal of the signal terminal P2 of the train identifier is 1, that is, when the train L enters the neutral section A0 from the power supply arm A2 through the section divider S2, the control unit CU first disconnects the vacuum switch K2, then turns off the thyristor switch T2, and then turns on the thyristor switch T1, that is, the neutral section A0 is disconnected from the power supply arm A2 and directly connected to the power supply arm A1;

[0078] C. If the output signal of the signal terminal of the train identifier P1 is 1, that is, when the train enters the power supply arm A1 from the neutral section A0 through the section divider S1, the control unit CU turns off the thyristor switch T1, that is, the neutral section A0 is disconnected from the power supply arm A1; then the signal terminal signals of the train identifier P1, the train identifier P2, and the train identifier P3 are reset to 0; and the power supply switching from the power supply arm A2 to the power supply arm A1 is completed.

[0079] Example 2

[0080] like Figure 2 As shown, a bidirectional arc extinguishing automatic phase-passing system for electrified railways, the automatic phase-passing system is arranged at the electric phase-passing section of the electrified railway, the electric phase-passing section includes a segmenter S1, a neutral section A0 and a segmenter S2; the power supply arm A1 of the electrified railway is connected to one end of the neutral section A0 through the segmenter S1, and the power supply arm A2 of the electrified railway is connected to the other end of the neutral section A0 through the segmenter S2.

[0081] The thyristor switch device includes a thyristor switch T1 and a thyristor switch T2, and the vacuum switch device includes a vacuum switch K1 and a vacuum switch K2. The vacuum switch K1 and the thyristor switch T1 are both connected in parallel at both ends of the segmenter S1, and the vacuum switch K2 and the thyristor switch T2 are both connected in parallel at both ends of the segmenter S2. The freewheeling resistor R is connected between the neutral segment A0 and the grounding wire.

[0082] When no train passes through the electrical phase separation, the thyristor switch device is in the off state and the vacuum switch device is in the off state.

[0083] The train position identification device includes a train identifier P1, a train identifier P2, and a train identifier P3; a train identifier P1 is provided at the end of a power supply arm A1 near a section divider S1, a train identifier P2 is provided on the neutral section A0, and a train identifier P3 is provided at the end of a power supply arm A2 near a section divider S2.

[0084] When no train passes, the signal end output signal of the train identifier P1, train identifier P2, and train identifier P3 is 0; when a train passes, the signal end output signal of the train identifier P1, train identifier P2, and train identifier P3 is 1.

[0085] The triggering ends of the thyristor switch 1 T1 and the thyristor switch 2 T2, the operating ends of the vacuum switch 1 K1 and the vacuum switch 2 K2, and the signal ends of the train identifier 1 P1, the train identifier 2 P2, and the train identifier 3 P3 are all connected to the control unit CU.

[0086] The control unit CU controls the on or off of the thyristor switch T1 and the closing or disconnection of the vacuum switch K1 according to the output signal of the train identifier P1; and the control unit CU controls the on or off of the thyristor switch T2 and the closing or disconnection of the vacuum switch K2 according to the output signal of the train identifier P3.

[0087] This embodiment utilizes the arc extinguishing capability of the vacuum switch K1 in cooperation with the thyristor switch T1 to reduce or eliminate the arc when the train pantograph is separated from the power supply arm A1; and utilizes the arc extinguishing capability of the vacuum switch K2 in cooperation with the thyristor switch T2 to reduce or eliminate the arc when the train pantograph is separated from the power supply arm A2, thereby realizing bidirectional arc extinguishing.

[0088] In Example 2, when the train travels in both directions, from the power supply arm 1 A1 direction through the neutral section A0 to the power supply arm 2 A2 direction, the control method steps are as follows:

[0089] A. If the output signal of the signal terminal of the train identifier P1 is 1, that is, the train identifier P1 senses that the train L is moving from the power supply arm A1 to the section divider S1, the control unit CU turns on the thyristor switch T1, so that the neutral section A0 is directly connected to the power supply arm A1, and the control unit CU then turns on the vacuum switch K1;

[0090] B. If the output signal of the signal terminal P2 of the train identifier 2 is 1, that is, when the train L enters the neutral section A0 from the power supply arm 1 A1 through the section divider 1 S1, the control unit CU first disconnects the vacuum switch 1 K1, then turns off the thyristor switch 1 T1, and then turns on the thyristor switch 2 T2, that is, the neutral section A0 is disconnected from the power supply arm 1 A1 and directly connected to the power supply arm 2 A2;

[0091] C. If the output signal of the signal terminal P3 of the train identifier 3 is 1, that is, when the train enters the power supply arm 2 A2 from the neutral section A0 through the section divider 2 S2, the control unit CU turns off the thyristor switch 2 T2, that is, the neutral section A0 is disconnected from the power supply arm 2 A2; then the signal terminal signals of the train identifier 1 P1, the train identifier 2 P2, and the train identifier 3 P3 are reset to 0; the power supply switching from the power supply arm 1 A1 to the power supply arm 2 A2 is completed.

[0092] When the vehicle moves from the power supply arm 2 A2 direction through the neutral section A0 to the power supply arm 1 A1 direction, the control method steps are as follows:

[0093] A. If the output signal of the signal terminal P3 of the train identifier is 1, that is, when the train identifier P3 senses that the train L is moving from the power supply arm A2 to the section divider S2, the control unit CU turns on the thyristor switch T2, so that the neutral section A0 is directly connected to the power supply arm A2, and the control unit CU then turns on the vacuum switch K2;

[0094] B. If the output signal of the signal terminal P2 of the train identifier is 1, that is, when the train L enters the neutral section A0 from the power supply arm A2 through the section divider S2, the control unit CU first disconnects the vacuum switch K2, then turns off the thyristor switch T2, and then turns on the thyristor switch T1, that is, the neutral section A0 is disconnected from the power supply arm A2 and directly connected to the power supply arm A1;

[0095] C. If the output signal of the signal terminal of the train identifier P1 is 1, that is, when the train enters the power supply arm A1 from the neutral section A0 through the section divider S1, the control unit CU turns off the thyristor switch T1, that is, the neutral section A0 is disconnected from the power supply arm A1; then the signal terminal signals of the train identifier P1, the train identifier P2, and the train identifier P3 are reset to 0; and the power supply switching from the power supply arm A2 to the power supply arm A1 is completed.

[0096] like Figure 3 As shown, the schematic diagram of the control unit of the present invention. The signal terminals of the train identifier 1 (P1), the train identifier 2 (P2), and the train identifier 3 (P3), the trigger terminals of the thyristor switch 1 (T1), and the thyristor switch 2 (T2), and the operating terminals of the vacuum switch 1 (K1) and the vacuum switch 2 (K2) are connected to the control unit (CU).

[0097] Train identifier 1 (P1), train identifier 2 (P2), and train identifier 3 (P3) output the detection signal to the control unit (CU) through the signal end. The control unit (CU) determines that the train is at the specific position of power supply arm 1 (A1), neutral section (A0), and power supply arm 2 (A2), and issues a thyristor switch 1 (T1) and thyristor switch 2 (T2) on or off command, as well as a vacuum switch 1 (K1) and vacuum switch 2 (K2) on or off command, to complete the smooth switching from power supply arm 1 to power supply arm 2 or from power supply arm 2 to power supply arm 1, and then commands the signal end output signal of train identifier 1 (P1), train identifier 2 (P2), and train identifier 3 (P3) to reset to 0, and the system returns to its initial state.

Claims

1. An electric railway arc extinguishing automatic phase-splitting system, comprising an electric phase splitter, a thyristor switch device, and a freewheeling resistor (R); the electric phase splitter comprises a sectionalizer 1 (S1), a neutral section (A0) and a sectionalizer 2 (S2); the power supply arm 1 (A1) of the electric railway is connected to one end of the neutral section (A0) through the sectionalizer 1 (S1), and the power supply arm 2 (A2) of the electric railway is connected to the other end of the neutral section (A0) through the sectionalizer 2 (S2); the thyristor switch device is connected in parallel to both ends of the sectionalizer 1 (S1) and the sectionalizer 2 (S2), and the freewheeling resistor (R) is connected between the neutral section (A0) and the grounding wire, characterized in that: The automatic phase-shifting system also includes a vacuum switch device, which is connected in parallel at both ends of segmenter 1 (S1), or the vacuum switch device is connected in parallel at both ends of segmenter 2 (S2), or the vacuum switch device is connected in parallel at both ends of segmenter 1 (S1) and segmenter 2 (S2).

2. The electric railway arc extinguishing automatic phase separation system according to claim 1 is characterized by: It also includes a train position identification device and a control unit (CU); the trigger end of the thyristor switch device, the operating end of the vacuum switch device, and the signal end of the train position identification device are all connected to the control unit (CU); the control unit (CU) controls the conduction or shutdown of the thyristor switch device and the closing or disconnection of the vacuum switch device according to the output signal of the train position identification device.

3. The electric railway arc extinguishing automatic phase separation system according to claim 2 is characterized by: The thyristor switch device comprises a thyristor switch 1 (T1) and a thyristor switch 2 (T2), wherein the thyristor switch 1 (T1) is connected in parallel to both ends of a segmenter 1 (S1), and the thyristor switch 2 (T2) is connected in parallel to both ends of a segmenter 2 (S2).

4. The electric railway arc extinguishing automatic phase separation system according to claim 3 is characterized by: The train position identification device includes a train identifier 1 (P1), a train identifier 2 (P2), and a train identifier 3 (P3); the train identifier 1 (P1) is provided at the end of the power supply arm 1 (A1) near the section divider 1 (S1), the train identifier 2 (P2) is provided on the neutral section (A0), and the train identifier 3 (P3) is provided at the end of the power supply arm 2 (A2) near the section divider 2 (S2).

5. The electric railway arc extinguishing automatic phase separation system according to claim 4 is characterized by: When no train passes, the signal output signals of the signal terminals of the train identifier 1 (P1), train identifier 2 (P2), and train identifier 3 (P3) are 0; when a train passes, the signal output signals of the signal terminals of the train identifier 1 (P1), train identifier 2 (P2), and train identifier 3 (P3) are 1.

6. The electric railway arc extinguishing automatic phase separation system according to claim 5, characterized in that: When no train passes through the electrical phase separation, the thyristor switch device is in the off state and the vacuum switch device is in the off state.

7. An electric railway arc extinguishing automatic phase separation system according to any one of claims 1 to 6, characterized in that: The vacuum switch device comprises a vacuum switch 1 (K1), which is connected in parallel to two ends of a sectioner 1 (S1); a control unit (CU) controls the on or off of a thyristor switch 1 (T1) and the closing or breaking of the vacuum switch 1 (K1) according to an output signal of a train identifier 1 (P1).

8. An electric railway arc extinguishing automatic phase separation system according to any one of claims 1 to 6, characterized in that: The vacuum switch device comprises a second vacuum switch (K2), which is connected in parallel to two ends of a second segmenter (S2); a control unit (CU) controls the on or off of the second thyristor switch (T2) and the closing or breaking of the second vacuum switch (K2) according to an output signal of a third train identifier (P3).

9. An electric railway arc extinguishing automatic phase separation system according to any one of claims 1 to 6, characterized in that: The vacuum switch device comprises a vacuum switch 1 (K1) and a vacuum switch 2 (K2), wherein the vacuum switch 1 (K1) is connected in parallel to both ends of a sectionalizer 1 (S1), and the vacuum switch 2 (K2) is connected in parallel to both ends of a sectionalizer 2 (S2); a control unit (CU) controls the on or off of the thyristor switch 1 (T1) and the closing or disconnection of the vacuum switch 1 (K1) according to an output signal of a train identifier 1 (P1), and controls the on or off of the thyristor switch 2 (T2) and the closing or disconnection of the vacuum switch 2 (K2) according to an output signal of a train identifier 3 (P3).

10. A control method for one-way arc extinguishing using the electric railway arc extinguishing automatic phase separation system according to claim 7, characterized in that: When the train travels in one direction, from the power supply arm 1 (A1) through the neutral section (A0) to the power supply arm 2 (A2), the control method steps are as follows: A. If the output signal of the signal terminal of the train identifier (P1) is 1, that is, the train identifier (P1) senses that the train (L) is moving from the power supply arm (A1) to the section divider (S1), the control unit (CU) turns on the thyristor switch (T1), so that the neutral section (A0) is directly connected to the power supply arm (A1), and the control unit (CU) then turns on the vacuum switch (K1); B. If the output signal of the signal terminal of the train identifier 2 (P2) is 1, that is, when the train (L) enters the neutral section (A0) from the power supply arm 1 (A1) through the section divider 1 (S1), the control unit (CU) first disconnects the vacuum switch 1 (K1), then turns off the thyristor switch 1 (T1), and then turns on the thyristor switch 2 (T2), that is, the neutral section (A0) is disconnected from the power supply arm 1 (A1) and directly connected to the power supply arm 2 (A2); C. If the output signal of the signal terminal of train identifier three (P3) is 1, that is, when the train enters power supply arm two (A2) from the neutral section (A0) through section divider two (S2), the control unit (CU) orders thyristor switch two (T2) to turn off, that is, the neutral section (A0) is disconnected from power supply arm two (A2); then the signal terminal signals of train identifier one (P1), train identifier two (P2), and train identifier three (P3) are reset to 0; and the power supply switching from power supply arm one (A1) to power supply arm two (A2) is completed.

11. A control method for one-way arc extinguishing using the electric railway arc extinguishing automatic phase separation system according to claim 8, characterized in that: When the train travels in one direction, from the power supply arm 2 (A2) through the neutral section (A0) to the power supply arm 1 (A1), the control method steps are as follows: A. If the output signal of the signal terminal of the train identifier 3 (P3) is 1, that is, the train identifier 3 (P3) senses that the train (L) is moving from the power supply arm 2 (A2) to the section divider 2 (S2), the control unit (CU) turns on the thyristor switch 2 (T2), so that the neutral section (A0) is directly connected to the power supply arm 2 (A2), and the control unit (CU) then turns on the vacuum switch 2 (K2); B. If the output signal of the signal terminal of the train identifier 2 (P2) is 1, that is, when the train (L) enters the neutral section (A0) from the power supply arm 2 (A2) through the section divider 2 (S2), the control unit (CU) first disconnects the vacuum switch 2 (K2), then turns off the thyristor switch 2 (T2), and then turns on the thyristor switch 1 (T1), that is, the neutral section (A0) is disconnected from the power supply arm 2 (A1) and directly connected to the power supply arm 1 (A1); C. If the output signal of the signal end of train identifier 1 (P1) is 1, that is, when the train enters power supply arm 1 (A1) from neutral section (A0) through section divider 1 (S1), the control unit (CU) turns off thyristor switch 1 (T1), that is, the neutral section (A0) is disconnected from power supply arm 1 (A1); then the signal end signals of train identifier 1 (P1), train identifier 2 (P2), and train identifier 3 (P3) are reset to 0; and the power supply switching from power supply arm 2 (A2) to power supply arm 1 (A1) is completed.

12. A control method for bidirectional arc extinguishing using the electric railway arc extinguishing automatic phase separation system according to claim 9, characterized in that: When the train travels in both directions, from the power supply arm 1 (A1) through the neutral section (A0) to the power supply arm 2 (A2), the control method steps are as follows: A. If the output signal of the signal terminal of the train identifier (P1) is 1, that is, the train identifier (P1) senses that the train (L) is moving from the power supply arm (A1) to the section divider (S1), the control unit (CU) turns on the thyristor switch (T1), so that the neutral section (A0) is directly connected to the power supply arm (A1), and the control unit (CU) then turns on the vacuum switch (K1); B. If the output signal of the signal terminal of the train identifier 2 (P2) is 1, that is, when the train (L) enters the neutral section (A0) from the power supply arm 1 (A1) through the section divider 1 (S1), the control unit (CU) first disconnects the vacuum switch 1 (K1), then turns off the thyristor switch 1 (T1), and then turns on the thyristor switch 2 (T2), that is, the neutral section (A0) is disconnected from the power supply arm 1 (A1) and directly connected to the power supply arm 2 (A2); C. If the output signal of the signal terminal of the train identifier 3 (P3) is 1, that is, when the train enters the power supply arm 2 (A2) from the neutral section (A0) through the section divider 2 (S2), the control unit (CU) turns off the thyristor switch 2 (T2), that is, the neutral section (A0) is disconnected from the power supply arm 2 (A2); then the signal terminal signals of the train identifier 1 (P1), train identifier 2 (P2), and train identifier 3 (P3) are reset to 0; the power supply switching from the power supply arm 1 (A1) to the power supply arm 2 (A2) is completed; When the vehicle passes through the neutral section (A0) from the power supply arm 2 (A2) to the power supply arm 1 (A1), the control method steps are as follows: A. If the output signal of the signal terminal of the train identifier 3 (P3) is 1, that is, the train identifier 3 (P3) senses that the train (L) is moving from the power supply arm 2 (A2) to the section divider 2 (S2), the control unit (CU) turns on the thyristor switch 2 (T2), so that the neutral section (A0) is directly connected to the power supply arm 2 (A2), and the control unit (CU) then turns on the vacuum switch 2 (K2); B. If the output signal of the signal terminal of the train identifier 2 (P2) is 1, that is, when the train (L) enters the neutral section (A0) from the power supply arm 2 (A2) through the section divider 2 (S2), the control unit (CU) first disconnects the vacuum switch 2 (K2), then turns off the thyristor switch 2 (T2), and then turns on the thyristor switch 1 (T1), that is, the neutral section (A0) is disconnected from the power supply arm 2 (A1) and directly connected to the power supply arm 1 (A1); C. If the output signal of the signal end of train identifier 1 (P1) is 1, that is, when the train enters power supply arm 1 (A1) from neutral section (A0) through section divider 1 (S1), the control unit (CU) turns off thyristor switch 1 (T1), that is, the neutral section (A0) is disconnected from power supply arm 1 (A1); then the signal end signals of train identifier 1 (P1), train identifier 2 (P2), and train identifier 3 (P3) are reset to 0; and the power supply switching from power supply arm 2 (A2) to power supply arm 1 (A1) is completed.

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