Traction bus interlocking breaking circuit of rail transit vehicle and control method of traction bus interlocking breaking circuit

Abstract

The embodiment of the invention discloses a rail transit vehicle traction bus interlocking breaking circuit and a control method thereof. The device comprises a third rail power supply, a first current collector, a second current collector, a warehouse power supply, an isolating switch, a bus breaker box, a traction inverter, an auxiliary inverter and a traction controller. The first end of the isolating switch is connected with the auxiliary inverter, the second end is connected with the traction high-voltage bus and one end of the first current collector, and the third end is connected with a garage power supply; one end of the second current collector is connected with a traction high-voltage bus and a traction inverter through a bus circuit breaker box, the other end of the first current collector and the other end of the second current collector are connected with a third rail power supply, and the traction controller is connected with the bus circuit breaker box; and the bus circuit breaker box is controlled to connect or disconnect the third rail power supply and the traction high-voltage bus. Through the above mode, the embodiment of the invention can perform automatic opening and closing control on the breaking of the bus in a remote automatic control mode, and is flexible in use scene and high in availability.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of rail vehicle control, and in particular to a rail transit vehicle traction bus interlocking disconnecting circuit and a control method thereof. Background Art

[0002] In the current urban rail transit industry, some lines are powered by the third rail, and electricity must be obtained through the current collector installed on the vehicle bogie in contact with the third rail. Due to the voltage difference between the substations that supply power to the ground third rail, different substations may be bridged through the vehicle's traction bus, which in turn causes a short circuit at the output end of adjacent substations, resulting in excessive instantaneous current, causing the protection device to operate and affecting the normal operation of the line.

[0003] The current commonly used solution is to arrange the vehicle traction bus in a decentralized manner without a through-design, resulting in low availability of the vehicle power supply circuit; or to directly install fuses and other protective devices on the bus, which cannot achieve separation and connection control and has poor flexibility. Summary of the invention

[0004] In view of the above problems, an embodiment of the present invention provides a rail transit vehicle traction bus interlocking disconnecting circuit and a control method thereof, which overcomes the above problems or at least partially solves the above problems.

[0005] According to one aspect of an embodiment of the present invention, a rail transit vehicle traction bus interlocking disconnecting circuit is provided, comprising: a third rail power supply, a first current collector, a second current collector, a storage power supply, a disconnector, a bus circuit breaker box, a traction inverter, an auxiliary inverter and a traction controller; the first end of the disconnector is connected to the auxiliary inverter, the second end of the disconnector is connected to the traction high-voltage bus and one end of the first current collector, the third end of the disconnector is connected to the storage power supply, one end of the first current collector is also connected to the traction high-voltage bus, one end of the second current collector is connected to the traction high-voltage bus and the traction inverter through the bus circuit breaker box, the other end of the first current collector and the other end of the second current collector are connected to the third rail power supply, and the traction controller is connected to the bus circuit breaker box for controlling the bus circuit breaker box to connect or disconnect the third rail power supply and the traction high-voltage bus.

[0006] Optionally, the isolating switch is a manual isolating switch; if the first end of the isolating switch is connected to the second end, the third rail power supply is connected to the auxiliary inverter and the traction high-voltage bus; if the first end of the isolating switch is connected to the third end, the depot power supply is connected to the auxiliary inverter.

[0007] Optionally, the busbar circuit breaker box includes: a high-voltage busbar circuit breaker and a first busbar contactor; one end of the high-voltage busbar circuit breaker is connected to the second current collector, the traction inverter and the traction high-voltage bus, and the other end of the first busbar contactor is connected to the traction high-voltage bus through the first busbar contactor.

[0008] Optionally, the busbar circuit breaker box further includes a second busbar contactor, one end of the second busbar contactor is connected to one end of the high-voltage busbar circuit breaker and the second current collector, and the other end is connected to the traction high-voltage bus.

[0009] Optionally, the high-voltage bus circuit breaker includes: a main coil, a first coil, a resistor, a second coil, and a main contact, a first contact, and a second contact corresponding to the main coil, the first coil, and the second coil respectively; one end of the first coil and one end of the second coil are connected to the traction controller, and the other end is connected to the negative end of DC 110V; one end of the first contact is connected to the positive end of DC 110V, and the other end is connected to the traction controller, and is connected to one end of the main coil through the main contact and the resistor connected in series; one end of the second contact is connected to the traction controller, and the other end is connected to one end of the main coil; the other end of the main coil is connected to the negative end of DC 110V.

[0010] Optionally, the first bus contactor and the second bus contactor respectively include a contactor main coil, an auxiliary coil, and contactor contacts and auxiliary contacts corresponding to the contactor main coil and the auxiliary coil, respectively; one end of the auxiliary coil is connected to the traction controller, and the other end is connected to the negative end of DC 110V, one end of the auxiliary contact is connected to the positive end of DC 110V, and the other end is connected to the negative end of DC 110V through the contactor main coil, one end of the contactor contact is connected to the positive end of DC 110V, and the other end is connected to the traction controller.

[0011] Based on the same inventive concept, an embodiment of the present invention also proposes a control method for the interlocking disconnecting circuit of the traction busbar of the aforementioned rail transit vehicle, comprising: when the vehicle needs power supply from the third rail, the first end of the disconnecting switch is controlled to be connected to the second end, and the traction high-voltage busbar is supplied with power through the first current receiver or the second current receiver via the third rail power supply; the on and off of the busbar circuit breaker box is controlled by the traction controller, and the connection between the second current receiver and the traction high-voltage busbar is controlled; when the vehicle leaves the depot and goes to the main line or goes off the main line and returns to the depot, the first end of the disconnecting switch is controlled to be connected to the third end to disconnect the traction high-voltage busbar.

[0012] Optionally, the on-off control of the bus breaker box and the connection between the second current collector and the traction high-voltage bus is controlled by the traction controller, including: if it is detected that the high-voltage bus breaker in the bus breaker box is connected normally, the traction controller outputs a breaker permission signal to control the first contact in the high-voltage bus breaker to close; if the high-voltage bus breaker meets the closing condition, the traction controller outputs a breaker closing signal to control the main contacts in the high-voltage bus breaker to close, and connect the second current collector to the traction high-voltage bus; if the vehicle speed is greater than the first preset speed, the traction controller outputs a contactor closing instruction to control the first bus contactor or the second bus contactor in the bus breaker box to close.

[0013] Optionally, the method of controlling the on and off of the busbar circuit breaker box and controlling the connection between the second current collector and the traction high-voltage bus by means of the traction controller also includes: if the vehicle speed is less than a second preset speed, the traction controller outputs a command to cancel the contactor closure and controls the first busbar contactor or the second busbar contactor in the busbar circuit breaker box to disconnect.

[0014] Optionally, the controlling of the main contacts in the high-voltage bus circuit breaker to close and connect the second current collector and the traction high-voltage bus includes: controlling the second contact to close and powering on the main coil in the high-voltage bus circuit breaker through the second contact; after the main coil is powered on, the main contact is attracted and the main contact is closed; after the main contact is closed, the second coil is controlled to lose power and the second contact is opened.

[0015] The rail transit vehicle traction bus interlocking disconnecting circuit of the embodiment of the present invention comprises: a third rail power supply, a first current collector, a second current collector, a storage power supply, an isolating switch, a bus circuit breaker box, a traction inverter, an auxiliary inverter and a traction controller; the first end of the isolating switch is connected to the auxiliary inverter, the second end of the isolating switch is connected to the traction high-voltage bus and one end of the first current collector, the third end of the isolating switch is connected to the storage power supply, one end of the first current collector is also connected to the traction high-voltage bus, one end of the second current collector is connected to the traction high-voltage bus and the traction inverter through the bus circuit breaker box, the other end of the first current collector and the other end of the second current collector are connected to the third rail power supply, the traction controller is connected to the bus circuit breaker box, and is used to control the bus circuit breaker box to connect or disconnect the third rail power supply and the traction high-voltage bus, and automatically control the disconnection of the bus through remote automatic control, so that the system can meet the use requirements of different usage scenarios, is more flexible, and has higher availability.

[0016] The above description is only an overview of the technical solution of the embodiment of the present invention. In order to more clearly understand the technical means of the embodiment of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0018] Figure 1 A schematic diagram showing the structure of a rail transit vehicle traction bus interlocking disconnecting circuit provided by an embodiment of the present invention is shown;

[0019] Figure 2 The figure shows the internal connection diagram of the busbar circuit breaker box provided by the embodiment of the present invention;

[0020] Figure 3 A schematic flow chart of a method for controlling a traction bus interlocking disconnecting circuit of a rail transit vehicle provided by an embodiment of the present invention is shown;

[0021] Figure 4 A schematic diagram of a control method for a busbar circuit breaker box provided in an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0022] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0023] Figure 1 The schematic diagram of the structure of the rail transit vehicle traction bus interlocking disconnection circuit provided by the embodiment of the present invention is shown. Figure 1As shown, the rail transit vehicle traction bus interlocking disconnecting circuit includes: a third rail power supply, a first current collector 11, a second current collector 12, a storage power supply, an isolating switch 13, a bus breaker box 14, a traction inverter 15, an auxiliary inverter 16 and a traction controller 17. The first end of the isolating switch 13 is connected to the auxiliary inverter 15, the second end is connected to the traction high-voltage bus 18 and one end of the first current collector 11, and the third end is connected to the storage power supply; one end of the first current collector 11 is also connected to the traction high-voltage bus 18, one end of the second current collector 12 is connected to the traction high-voltage bus 18 and the traction inverter 17 through the bus breaker box 14, the other end of the first current collector 11 and the other end of the second current collector 12 are connected to the third rail power supply, and the traction controller is connected to the bus breaker box 14, which is used to control the bus breaker box 14 to connect or disconnect the third rail power supply and the traction high-voltage bus 18.

[0024] In an embodiment of the present invention, Figure 1 The third rail power supply is DC1500V or DC750V for 6-carriage subway vehicles. The vehicle has 8 pairs of current collectors installed on both sides of the bogie for three-rail current collection. The vehicle traction high-voltage busbar runs through the entire vehicle to supply power to the four traction converters of the entire vehicle. Figure 1 Only four pairs of current collectors on one side of the vehicle are shown. The auxiliary high-voltage busbar 19 runs through the entire vehicle. As long as any current collector (the first current collector 11 or the second current collector 12) is connected to the DC1500V / DC750V high voltage, the two auxiliary inverters 16 of the entire vehicle can work normally and supply power to the AC380V load and DC110V load of the entire vehicle.

[0025] The third end of the isolating switch 13 is connected to the warehouse power socket, the first end of the warehouse power socket is connected to DC110V through the fuse QF, the second end of the warehouse power socket is grounded through the contact switch SPK2 and the coil SPK1 connected in series, the third end of the warehouse power socket is connected to the warehouse power supply through the contact switch SPK1, and the first end of the warehouse power socket is connected to the second end. When the fuse QF and the contact switch SPK2 are connected, the coil SPK1 is powered on, controlling the corresponding contact switch SPK1 to close, and the third end of the warehouse power socket is connected to the warehouse power supply.

[0026] The isolating switch 13 is a manual isolating switch; if the first end of the isolating switch 13 is connected to the second end, that is, the isolating switch 13 is in the "running" position, the third rail power supply is connected to the auxiliary inverter 16 and the traction high-voltage bus 18, that is, the third rail power supply is connected to the traction system and the auxiliary system. If the first end of the isolating switch 13 is connected to the third end, that is, the isolating switch 13 is in the "storage" position, the storage power supply is connected to the auxiliary inverter 16, the storage power supply can be connected to the auxiliary system power supply, and the traction system cannot be powered.

[0027] In an embodiment of the present invention, the rail transit vehicle traction bus interlocking disconnecting circuit also includes a diode V1, a high-speed circuit breaker 20 and a plurality of fuses. The fuse BF is connected in series between the first current collector 11 and the traction high-voltage bus 18. The anode of the diode V1 is connected to the first end of the disconnector 13, and the cathode of the diode V1 is connected to the auxiliary high-voltage bus 19 through the fuse BAF, and is connected to the auxiliary inverter 16 through the fuse AF. The first current collector 11 is connected to the traction inverter 17 through the high-speed circuit breaker 20. The second current collector 12 is connected to the traction inverter 17 through the bus breaker box 14 and the high-speed circuit breaker 20.

[0028] In the embodiment of the present invention, the third rail power supply enters the traction high-voltage bus 18 through the first current collector 11 and / or the second current collector 12, and a bus breaker box 14 is provided on the traction high-voltage bus 18. The bus breaker box 14 includes: a high-voltage bus breaker (BHB) 141 and a first bus contactor (BLB) 142. One end of the high-voltage bus breaker 141 is connected to the second current collector 12, the traction inverter 15 and the traction high-voltage bus 18, and the other end of the first bus contactor 141 is connected to the traction high-voltage bus 18 through the first bus contactor 142.

[0029] The busbar circuit breaker box 14 also includes a second busbar contactor (BLB) 143, one end of which is connected to one end of the high-voltage busbar circuit breaker 141 and the second current collector 12, and the other end is connected to the traction high-voltage bus 18. That is, the second busbar contactor 143 is connected between the high-voltage busbar circuit breaker 141 and the second current collector 12 and the traction high-voltage bus 18. The busbar circuit breaker box 14 may also include a fuse 144, which is connected between the high-voltage busbar circuit breaker 141 and the second current collector 12 and the second busbar contactor (BLB) 143. In two adjacent busbar circuit breaker boxes 14, it is only necessary to set the second busbar contactor 143 in one of the busbar circuit breaker boxes 14. When the BHB and BLB in the vehicle are closed, that is, the high-voltage bus circuit breaker (BHB) 141, the first bus contactor (BLB) 142 and the second bus contactor (BLB) 143 are all closed, the traction high-voltage bus 18 runs through the entire vehicle; when one of the devices is disconnected, the corresponding power supply unit, that is, the third rail power supply, is disconnected respectively.

[0030] In the embodiment of the present invention, both BHB and BLB are remotely controlled by the traction controller (DCU) 17, and a circuit breaker BHB and a contactor BLB on-off control interlocking circuit and a state feedback circuit are provided. Figure 2As shown, X1.8 represents the 8th pin of the busbar circuit breaker box 14, X2.3 represents the 3rd pin of the traction controller, and so on, and other pins are not repeated. The high-voltage busbar circuit breaker 141 includes: a main coil BHB, a first coil BHBK1, a resistor BHBR1, a second coil BHBK2, and a main contact BHB, a first contact BHBK1, and a second contact BHBK2 corresponding to the main coil BHB, the first coil BHBK1, and the second coil BHBK2 respectively. A reverse diode is connected in parallel at both ends of the main coil BHB, the first coil BHBK1, and the second coil BHBK2. One end of the first coil BHBK1 and one end of the second coil BHBK2 are connected to the traction controller DCU, and the other ends are connected to the negative end DC110V- of DC 110V. Specifically, one end of the first coil BHBK1 is connected to the 3rd pin of the traction controller DCU through the 8th pin of the bus breaker box 14, and the other end is connected to the negative end DC110V- of the DC 110V through the 10th and 11th pins of the bus breaker box 14. One end of the second coil BHBK2 is connected to the 4th pin of the traction controller DCU through the 6th pin of the bus breaker box 14, and the other end is connected to the negative end DC110V- of the DC 110V through the 10th and 11th pins of the bus breaker box 14. One end of the first contact BHBK1 is connected to the positive end DC110V+ of the DC 110V, and the other end is connected to the traction controller DCU, and is connected to one end of the main coil BHB through the main contact BHB and the resistor BHBR1 connected in series. One end of the second contact BHBK2 is connected to the traction controller DCU, specifically connected to the 25th pin of the traction controller DCU through the 5th pin of the bus breaker box 14, and the other end is connected to one end of the main coil BHB; the other end of the main coil BHB is connected to the negative end DC110V- of DC 110V. That is, one end of the main contact BHB is connected to the negative end DC110V- of DC 110V through the main coil BHB, and the other end is connected to the 5th pin of the bus breaker box 14 and the other end of the first contact BHBK1 through the series resistor BHBR1. The 5th pin of the bus breaker box 14 is connected to the 25th pin of the traction controller DCU, and the traction controller DCU detects the closed or open state of the high-voltage bus breaker 141 through the 25th pin. The second contact BHBK2 is connected in parallel to both sides of the main coil BHB and the resistor BHBR1 connected in series. The second contact BHBK2 is also connected to the 28th pin of the traction controller DCU through the 12th pin of the busbar circuit breaker box 14 so that the traction controller DCU can detect its status.

[0031] Continue to see Figure 2, the first bus contactor 142 and the second bus contactor 143 respectively include contactor main coils BLB1 and BLB2, auxiliary coils K01 and K02, and contactor contacts BLB1, BLB2 and auxiliary contacts K01 and K02 corresponding to the contactor main coils BLB1 and BLB2 and the auxiliary coils K01 and K02. A reverse diode is connected in parallel at both ends of the contactor main coils BLB1, BLB2 and the auxiliary coils K01 and K02. One end of the auxiliary coils K01 and K02 is connected to the traction controller DCU, and the other end is connected to the negative end DC110V- of the DC 110V. Specifically, one end of the auxiliary coil K01 is connected to the 26th pin of the traction controller DCU through the 3rd pin of the bus breaker box 14, and the other end is connected to the negative end DC110V- of the DC 110V through the 10th and 11th pins of the bus breaker box 14. One end of the auxiliary coil K02 is connected to the 7th pin of the traction controller DCU through the 13th pin of the busbar circuit breaker box 14, and the other end is connected to the negative end DC110V- of the DC 110V through the 10th and 11th pins of the busbar circuit breaker box 14. One end of the auxiliary contacts K01 and K02 is connected to the positive end DC110V+ of the DC 110V, and the other end is connected to the negative end DC110V- of the DC 110V through the contactor main coils BLB1 and BLB2. The contactor main coil BLB1 of the first busbar contactor 142 is connected to the positive end DC110V+ of the DC 110V through the auxiliary contact K01 connected in series and the 1st pin of the busbar circuit breaker box 14. The contactor main coil BLB2 of the second busbar contactor 143 is connected to the positive end DC110V+ of the DC 110V through the auxiliary contact K02 connected in series and the 1st pin of the busbar circuit breaker box 14. One end of the contactor contacts BLB1 and BLB2 is connected to the positive end of DC 110V, and the other end is connected to the traction controller DCU, so that the traction controller DCU can detect the closed or open state of the first bus contactor and the second bus contactor.

[0032] In the embodiment of the present invention, the high-voltage busbar circuit breaker can also be replaced by a fuse. The control of BHB and BLB is the responsibility of the traction controller DCU, and the specific control logic is as follows:

[0033] When the third rail power supply needs to be connected, the traction controller DCU outputs a circuit breaker permission signal (BHB permission instruction), the first coil BHBK1 in the high-voltage bus circuit breaker 141 is powered on, and the corresponding first contact BHBK1 is controlled to close. Then the traction controller DCU outputs a circuit breaker closing signal (BHB closing instruction), the second coil BHBK2 in the high-voltage bus circuit breaker 141 is powered on, the corresponding second contact BHBK2 is controlled to close, the main coil BHB is turned on and powered on, and the corresponding main contact BHB is controlled to close. After the traction controller DCU detects that the main contact BHB is closed through the 25th pin, it outputs a control signal to control the second coil BHBK2 to lose power, and the corresponding second contact BHBK2 is disconnected. The closing process of the high-voltage bus circuit breaker 141 is now completed. The high-voltage bus circuit breaker is maintained closed by a small current in the series circuit of the main contact BHB and the resistor BHBR1.

[0034] One second after the high-voltage bus circuit breaker is closed, if the vehicle speed is greater than 3km / h, the traction controller DCU issues a "BLB close" command and the BLB is closed. When the BLB is closed, when the vehicle speed is lower than 2.5km / h, the DCU cancels the "BLB close" command and the BLB is disconnected. For example, if the first bus contactor 142 needs to be closed, the traction controller DCU issues a BLB1 close command, the auxiliary coil K01 of the first bus contactor 142 is energized, the corresponding auxiliary contact K01 is controlled to close, and the contactor main coil BLB1 connected in series with the auxiliary contact K01 is energized, thereby controlling the contactor contact BLB1 to close, and completing the closing of the first bus contactor 142. The closing process of the second bus contactor 143 is exactly the same as that of the first bus contactor 142, and will not be repeated.

[0035] In an embodiment of the present invention, when a vehicle leaves the depot and goes onto the main line or goes off the main line and returns to the depot, the driver can turn the traction high-voltage busbar cut-off switch to the cut-off position, that is, disconnect the high-voltage busbar circuit breaker, so as to disconnect the traction high-voltage busbar and prevent cross-current between different power supply areas through the traction high-voltage busbar.

[0036] The rail transit vehicle traction bus interlocking disconnecting circuit of the embodiment of the present invention automatically controls the disconnection and closing of the traction high-voltage bus by arranging a circuit breaker and a contactor on the vehicle traction high-voltage bus, so that the system can meet the usage requirements of different usage scenarios and meet the power supply use of the vehicle in different power supply sections, which is more flexible and has higher availability; the disconnection of the traction high-voltage bus is controlled by remote microcomputer automatic control, without manual operation, which is safer and more reliable, and can achieve real-time status monitoring, and can accurately understand the on-off status of the bus.

[0037] Based on the same concept, an embodiment of the present invention also provides a control method for a rail transit vehicle traction bus interlocking disconnecting circuit. Figure 3As shown, the control method of the rail transit vehicle traction bus interlocking disconnecting circuit includes:

[0038] Step S11: When the vehicle needs third-rail power supply, the first end of the isolating switch is controlled to be connected to the second end, and the third-rail power supply is used to supply power to the traction high-voltage bus through the first current receiver or the second current receiver.

[0039] When the vehicle does not need the third rail power supply, the first end of the isolating switch 13 is controlled to be connected to the third end, that is, the isolating switch 13 is in the "depot" position. At this time, the depot power supply is connected to the auxiliary inverter 16, and the depot power supply can be connected to the auxiliary system power supply, and the traction system cannot be powered. When the vehicle needs the third rail power supply, the first end of the isolating switch 13 is controlled to be connected to the second end, that is, the isolating switch 13 is in the "running" position. At this time, the third rail power supply is connected to the auxiliary inverter 16 and the traction high-voltage bus 18, specifically, it is connected to the third rail power supply through the first current receiver or the second current receiver to obtain power, and supply power to the traction high-voltage bus, that is, the third rail power supply is connected to the traction system and the auxiliary system.

[0040] Step S12: Controlling the on and off of the busbar circuit breaker box through the traction controller, and controlling the connection between the second current collector and the traction high-voltage busbar.

[0041] In the embodiment of the present invention, if it is detected that the high-voltage bus breaker in the bus breaker box is connected normally, the traction controller outputs a circuit breaker permission signal to control the first contact in the high-voltage bus breaker to close. The specific process is described in the previous discussion and will not be repeated here. Among them, when the following conditions are met, it means that the high-voltage bus breaker in the bus breaker box is connected normally:

[0042] A) There is no High Speed ​​Circuit Breaker (HSCB) command at the driver's cab occupied end; if a HSCB command is received, the BHB permission is revoked until a HSCB command is received to reset;

[0043] B) BLB removal at the driver's cab occupied end is invalid;

[0044] C) No BLB engagement failure;

[0045] D) There is no BHB or BHB control device failure.

[0046] If the high-voltage bus circuit breaker meets the closing condition, the traction controller outputs a circuit breaker closing signal to control the main contacts in the high-voltage bus circuit breaker to close, thereby connecting the second current collector to the traction high-voltage bus.

[0047] The closing conditions of the high-voltage busbar circuit breaker are as follows:

[0048] A) BHB is allowed to be effective;

[0049] B) BHB status is disconnected;

[0050] C) There should be a 15s interval between two BHB close commands;

[0051] D) After the BHB state is disconnected, it takes 5 seconds to output the BHB close command;

[0052] E) Only 3 BHB combination instructions are allowed within 1 minute.

[0053] When the high-voltage busbar circuit breaker is closed, the second contact is first controlled to close, and the main coil in the high-voltage busbar circuit breaker is powered on through the closed second contact; after the main coil is powered on, the main contact is attracted and the main contact is closed; after the main contact is closed, the secondary coil is controlled to lose power and the second contact is disconnected. In this way, the high-voltage busbar circuit breaker is maintained closed by a small current in the series circuit of the main contact BHB and the resistor BHBR1.

[0054] After the high-voltage bus breaker is closed for a preset time, if the vehicle speed is greater than the first preset speed, the traction controller outputs a contactor closing instruction to control the first bus contactor or the second bus contactor in the bus breaker box to close. The preset time and the first preset speed can be set as needed. Preferably, the preset time is 1s and the first preset speed is 3km / h. At this point, the vehicle can use the third rail power supply to run normally. The specific control process is as follows Figure 3 As shown, first power on the traction controller DCU, and then determine whether there is no HSCB instruction at the driver's cab occupied end, whether the BLB removal at the driver's cab occupied end is invalid, whether there is no BLB engagement failure, and whether there is no BHB and BHB control device failure. If all are no, the traction controller DCU issues a BHB permission instruction. Otherwise, repeat the detection and judgment. After the traction controller DCU issues the BHB permission instruction, it continues to determine whether the BHB state is disconnected and whether it meets the BHB control protection interval. If both are yes, the traction controller DCU issues a BHB closing instruction to control the high-voltage bus circuit breaker to close. Otherwise, continue to detect and judge, and do not perform other actions. After the high-voltage bus circuit breaker is closed, determine whether the vehicle speed is greater than 3km / h. If so, the traction controller DCU issues a BLB closing instruction; otherwise, continue to detect the vehicle speed.

[0055] When the first bus contactor and the second bus contactor are closed, if the vehicle speed is less than the second preset speed, the traction controller outputs a cancel contactor closing instruction to control the first bus contactor and the second bus contactor in the bus breaker box to be disconnected. The second preset speed can be set as needed, preferably 2.5 km / h.

[0056] Step S13: When the vehicle leaves the depot and goes onto the main line or goes off the main line and goes back to the depot, the first end of the isolating switch is controlled to be connected to the third end to disconnect the traction high-voltage busbar.

[0057] When the vehicle leaves the depot and goes to the main line or goes down the main line and returns to the depot, the driver can turn the traction high-voltage busbar cut-off switch to the cut-off position, that is, disconnect the high-voltage busbar circuit breaker to disconnect the high-voltage busbar and prevent cross-current between different power supply areas through the high-voltage busbar.

[0058] The embodiment of the present invention arranges a circuit breaker and a contactor on the vehicle traction high-voltage busbar to automatically control the disconnection and closing of the traction high-voltage busbar, so that the system can meet the use requirements of different usage scenarios and meet the power supply use of vehicles in different power supply sections, which is more flexible and has higher availability; the disconnection of the traction high-voltage busbar is controlled by remote microcomputer automatic control, without manual operation, which is safer and more reliable, and can achieve real-time status monitoring, and can accurately understand the on-off status of the busbar.

[0059] The above specific embodiments of the present invention are described. In some cases, the actions or steps recorded in the embodiments of the present invention can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the process depicted in the accompanying drawings does not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0060] The method of the above embodiment is applied to the corresponding device in the above embodiment, and has the beneficial effects of the corresponding device embodiment, which will not be described in detail here.

[0061] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present disclosure is limited to these examples. Based on the concept of the present disclosure, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0062] This application is intended to cover all such substitutions, modifications and variations that fall within the broad scope of all embodiments. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included in the scope of protection of this disclosure.

Claims

1. A rail transit vehicle traction bus interlocking disconnecting circuit, characterized in that: The rail transit vehicle traction bus interlocking disconnecting circuit includes: a third rail power supply, a first current collector, a second current collector, a storage power supply, a disconnector, a bus circuit breaker box, a traction inverter, an auxiliary inverter and a traction controller; the first end of the disconnector is connected to the auxiliary inverter, the second end of the disconnector is connected to the traction high-voltage bus and one end of the first current collector, the third end of the disconnector is connected to the storage power supply, one end of the first current collector is also connected to the traction high-voltage bus, one end of the second current collector is connected to the traction high-voltage bus and the traction inverter through the bus circuit breaker box, the other end of the first current collector and the other end of the second current collector are connected to the third rail power supply, and the traction controller is connected to the bus circuit breaker box, which is used to control the bus circuit breaker box to connect or disconnect the third rail power supply and the traction high-voltage bus.

2. The rail transit vehicle traction bus interlocking disconnecting circuit according to claim 1, characterized in that: The isolating switch is a manual isolating switch; if the first end of the isolating switch is connected to the second end, the third rail power supply is connected to the auxiliary inverter and the traction high-voltage bus; if the first end of the isolating switch is connected to the third end, the depot power supply is connected to the auxiliary inverter.

3. The rail transit vehicle traction bus interlocking disconnecting circuit according to claim 1, characterized in that: The bus breaker box includes: a high-voltage bus breaker and a first bus contactor; one end of the high-voltage bus breaker is connected to the second current collector, the traction inverter and the traction high-voltage bus, and the other end of the first bus contactor is connected to the traction high-voltage bus through the first bus contactor.

4. The rail transit vehicle traction bus interlocking disconnecting circuit according to claim 3, characterized in that: The busbar circuit breaker box also includes a second busbar contactor, one end of which is connected to one end of the high-voltage busbar circuit breaker and the second current collector, and the other end is connected to the traction high-voltage bus.

5. The rail transit vehicle traction bus interlocking disconnecting circuit according to claim 4, characterized in that: The high-voltage bus circuit breaker includes: a main coil, a first coil, a resistor, a second coil, and a main contact, a first contact, and a second contact corresponding to the main coil, the first coil, and the second coil respectively; one end of the first coil and one end of the second coil are connected to the traction controller, and the other ends are connected to the negative end of DC 110V; one end of the first contact is connected to the positive end of DC 110V, and the other end is connected to the traction controller, and is connected to one end of the main coil through the main contact and the resistor connected in series; one end of the second contact is connected to the traction controller, and the other end is connected to one end of the main coil; the other end of the main coil is connected to the negative end of DC 110V.

6. The rail transit vehicle traction bus interlocking disconnecting circuit according to claim 4, characterized in that: The first bus contactor and the second bus contactor respectively include a contactor main coil, an auxiliary coil, and contactor contacts and auxiliary contacts corresponding to the contactor main coil and the auxiliary coil respectively; one end of the auxiliary coil is connected to the traction controller, and the other end is connected to the negative end of DC 110V, one end of the auxiliary contact is connected to the positive end of DC 110V, and the other end is connected to the negative end of DC 110V through the contactor main coil, one end of the contactor contact is connected to the positive end of DC 110V, and the other end is connected to the traction controller.

7. A control method for a rail transit vehicle traction bus interlocking disconnecting circuit as claimed in any one of claims 1 to 6, characterized in that: The control method comprises: When the vehicle needs third-rail power supply, the first end of the isolating switch is controlled to be connected to the second end, and the third-rail power supply is used to supply power to the traction high-voltage busbar through the first current receiver or the second current receiver; Controlling the on and off of the busbar circuit breaker box through the traction controller, and controlling the connection between the second current collector and the traction high-voltage busbar; When a vehicle leaves the depot and goes onto the main line, or goes off the main line and goes back to the depot, the first end of the isolating switch is controlled to be connected to the third end to disconnect the traction high-voltage busbar.

8. The method according to claim 7, characterized in that: The method of controlling the on and off of the busbar circuit breaker box through the traction controller and controlling the connection between the second current collector and the traction high-voltage busbar includes: If it is detected that the high-voltage bus breaker in the bus breaker box is connected normally, the traction controller outputs a breaker enable signal to control the first contact in the high-voltage bus breaker to close; If the high-voltage bus breaker meets the closing condition, the traction controller outputs a circuit breaker closing signal to control the main contacts in the high-voltage bus breaker to close, thereby connecting the second current collector to the traction high-voltage bus; If the vehicle speed is greater than the first preset speed, the traction controller outputs a contactor closing instruction to control the first bus contactor or the second bus contactor in the bus breaker box to close.

9. The method according to claim 8, characterized in that: The method of controlling the on and off of the busbar circuit breaker box by the traction controller and controlling the connection between the second current collector and the traction high-voltage busbar also includes: If the vehicle speed is less than the second preset speed, the traction controller outputs a contactor closing cancellation instruction to control the first bus contactor or the second bus contactor in the bus breaker box to be opened.

10. The method according to claim 8, characterized in that: The controlling of closing the main contacts in the high-voltage bus circuit breaker to connect the second current collector to the traction high-voltage bus includes: Controlling the second contact to close, and powering on the main coil in the high-voltage bus circuit breaker through the second contact; After the main coil is powered on, the main contacts are attracted and closed; After the main contact is closed, the secondary coil is controlled to lose power and the second contact is opened.

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