Train high-voltage power supply system fault handling method, controller, train and medium

Abstract

Provided are a train high-voltage power supply system fault handling method, a controller, a train and a medium. The method comprises: first classifying faults of high-voltage and traction systems into three levels: critical fault, moderate fault and minor fault; determining whether a fault has occurred in a high-voltage power supply system; and, in response to occurrence of a fault in the high-voltage power supply system, obtaining a faulty line section, and, on the basis of the fault type, the faulty line section and the fault level of the fault type, taking corresponding protective measures. In case of faults of traction systems and high-voltage systems during train running, the train high-voltage power supply system fault handling method provides an intelligent protection system for autonomously identifying fault information, taking effective protective measures to isolate faulty devices, and automatedly closing train circuit breakers, thus reducing risks of human misjudgment or operation errors, and improving the safety and reliability of the driverless operation mode.

Description

Train high-voltage power supply system fault handling method, controller, train and medium

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application number 2024100564968 filed with the Chinese Patent Office on January 15, 2024, entitled “Train high-voltage power supply system fault handling method, controller, train and medium,” the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of rail transportation, and in particular to a method for handling faults in a train high-voltage power supply system, an on-board controller, a rail train, and a computer-readable storage medium. Background Art

[0004] The high-voltage power supply system is the train's power source and a vital component. The high-voltage system receives high-voltage AC power from the high-voltage catenary, providing power for the vehicle's traction equipment and other auxiliary facilities, as well as monitoring and protecting them. The safety and reliability of its operation are directly related to the normal operation of the train.

[0005] Unmanned vehicles have higher requirements for the safety and reliability of high-voltage systems. In fully automatic driving mode, when a high-voltage system failure occurs, there is no driver to operate, so as to avoid human intervention due to high-voltage system failure as much as possible.

[0006] Summary of the Invention

[0007] The purpose of this application is to provide a method for handling faults in a train high-voltage power supply system. In a fully automatic driving mode, when a high-voltage system fault occurs, manual intervention due to the high-voltage system fault is avoided as much as possible, thereby improving the availability in the fully automatic driving mode.

[0008] The present application provides a method for troubleshooting a high-voltage power supply system on a train, comprising the following steps:

[0009] Classify the fault types of the high voltage power supply system;

[0010] Determine whether the high-voltage power supply system has a fault;

[0011] In response to a fault in the high-voltage power supply system, the fault line section is obtained, and corresponding protection measures are taken according to the fault type, the fault line section, and the fault classification of the fault type.

[0012] In some embodiments, the faults are classified into three levels: severe faults, moderate faults, and minor faults. Severe faults have a higher priority than moderate faults, and moderate faults have a higher priority than minor faults. Faults with higher priorities are processed first.

[0013] In some embodiments, if the same minor fault occurs multiple times within the first time interval, the fault is upgraded to a moderate fault; if the same moderate fault occurs multiple times within the first time interval, the fault is upgraded to a severe fault.

[0014] In some embodiments, the serious faults include: an overcurrent fault occurring in the circuit portion between the pantograph and the high-voltage bus, a transformer protection fault occurring in the traction unit, and a four-quadrant input-side ground fault;

[0015] The medium faults include: train-level main circuit breaker failure fault and high-voltage disconnector failure fault in the circuit between the pantograph and the high-voltage bus, as well as four-quadrant input overcurrent fault and unit-level main circuit breaker failure fault in the traction unit;

[0016] The minor faults include: grid voltage overvoltage fault occurring in the circuit part between the pantograph and the high-voltage bus, frequent closing fault of the train-level main circuit breaker, and traction unit grid voltage overvoltage fault, pre-charging fault and frequent closing fault of the unit-level circuit breaker occurring in the traction unit.

[0017] In some embodiments, the steps further include:

[0018] If the fault is classified as a minor fault and occurs in the circuit between the pantograph and the high-voltage busbar, the train-level main circuit breaker and the high-voltage disconnector on the high-voltage busbar will be closed. The train-level main circuit breaker and the high-voltage disconnector on the high-voltage busbar will be automatically closed after the fault is eliminated.

[0019] According to the fault classification as a minor fault, the fault occurs in the traction unit, and the unit-level main circuit breaker of the traction unit where the fault occurs is disconnected, and the unit-level main circuit breaker of the traction unit where the fault occurs is automatically closed after the fault is eliminated.

[0020] In some embodiments, the steps are further included;

[0021] If the fault is classified as a medium fault and occurs in the circuit between the pantograph and the high-voltage busbar, the faulty line section will be automatically cut off and the train-level main circuit breaker and unit-level main circuit breaker that can operate normally will be closed;

[0022] According to the fault classification as a medium fault, the fault occurs in the traction unit, then the unit-level main circuit breaker of the traction unit where the fault occurs is disconnected, and the network is requested to cut off the faulty equipment. After the faulty equipment is cut off, the unit-level main circuit breaker of the traction unit where the fault occurs is automatically closed.

[0023] In some embodiments, the steps are further included;

[0024] If the fault is classified as a serious fault and occurs in the circuit between the pantograph and the high-voltage busbar, the faulty line section will be automatically cut off and the train-level main circuit breakers and unit-level main circuit breakers that can operate normally will be closed;

[0025] If the fault is classified as a serious fault and the fault occurs in the traction unit, the unit-level main circuit breaker of the faulty traction unit will be disconnected and the network will be requested to cut off the faulty equipment; in response to the faulty equipment cutting-off signal, the unit-level main circuit breaker of the faulty traction unit will be closed; in response to the faulty equipment not being cut off within the second time, the unit-level main circuit breaker of the faulty traction unit will remain disconnected.

[0026] In some embodiments, obtaining the fault line section includes the steps of:

[0027] Acquiring train operation information, including the status of a train-level main circuit breaker, a unit-level main circuit breaker, and a high-voltage disconnector on a busbar, as well as detection data from several fault detection units;

[0028] Based on the acquired operating information, determine the fault line section and fault mode of the train high-voltage power supply system.

[0029] The purpose of this application is to provide another method for troubleshooting a high-voltage power supply system of a train, comprising the following steps:

[0030] The fault types of the high-voltage power supply system are classified into three levels: minor fault, moderate fault, and severe fault;

[0031] Determine whether the high-voltage power supply system has a fault;

[0032] In response to the high-voltage power supply system not having any fault, the unit-level main circuit breaker in the traction unit, the high-voltage disconnector on the busbar, and the train-level main circuit breaker on the pantograph side are closed, and the train operates normally;

[0033] In response to a fault in the high-voltage power supply system, the type of fault is determined. Based on the fault type being a high-voltage busbar grounding and the fault type and fault classification comparison table, it is determined that the high-voltage busbar grounding is a serious fault. The fault line section is then identified, and the high-voltage disconnector on the busbar and the train-level main circuit breaker on the pantograph side are disconnected.

[0034] Determine whether the grounding section is on the bow lifting side;

[0035] In response to the grounded section being on the pantograph-raising side, a dialog box pops up on the train driver's cab display screen, suggesting pantograph-changing operation and asking whether to execute it; and after receiving a confirmation signal from the train driver's cab display screen, the pantograph-changing operation is automatically carried out, closing the high-voltage disconnector on the busbar and the corresponding train-level main circuit breaker and each unit-level main circuit breaker on the pantograph-raising side at this time;

[0036] In response to the grounding section being on the non-pantograph side, the unit-level main circuit breaker in the traction unit and the train-level main circuit breaker on the pantograph side are closed, the high-voltage disconnector on the busbar remains disconnected, and the train maintains operation.

[0037] The purpose of this application is to provide another method for troubleshooting a high-voltage power supply system of a train, comprising the following steps:

[0038] The fault types of the high-voltage power supply system are classified into three levels: minor fault, moderate fault, and severe fault;

[0039] Determine whether the high-voltage power supply system has a fault;

[0040] In response to the high-voltage power supply system not having any fault, the unit-level main circuit breaker in the traction unit, the high-voltage disconnector on the busbar, and the train-level main circuit breaker on the pantograph side are closed, and the train operates normally;

[0041] In response to a fault in the high-voltage power supply system, determining the type of the fault, and determining that the traction converter four-quadrant input overcurrent is a medium fault based on the fault type being a traction converter four-quadrant input overcurrent and a fault type and fault classification comparison table;

[0042] Identify the fault line section, disconnect the unit-level main circuit breaker of the traction unit where the fault occurs, and determine whether the main contactor of the converter of the traction unit where the fault occurs can be disconnected;

[0043] In response to the main contactor being able to be opened, disconnecting the converter of the traction unit where the fault occurs, and closing the unit-level main circuit breaker of the traction unit where the fault occurs to maintain operation;

[0044] In response to the main contactor being unable to be opened, the unit-level main circuit breaker of the traction unit where the fault occurs is opened to maintain operation.

[0045] The purpose of this application is to provide a controller, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned method for handling faults of a high-voltage power supply system of a train when executing the computer program.

[0046] The purpose of this application is to provide a train, which includes the above-mentioned controller.

[0047] The purpose of the present application is to provide a medium storing a computer program, which implements the above-mentioned train high-voltage power supply system fault handling method when executed by a processor.

[0048] The beneficial effects that this application can achieve:

[0049] 1. The train high-voltage power supply system fault handling method described in this application classifies and grades in detail all possible faults that may occur in the train high-voltage power supply system, and adopts fault detection equipment at all levels to accurately detect and locate the fault section and fault type, thereby improving the reliability and comprehensiveness of fault handling.

[0050] 2. The train high-voltage power supply system fault handling method described in this application can autonomously identify fault information, take targeted and effective protection measures according to different fault types, cut off the faulty equipment, and automatically close the train circuit breaker when conditions are met, thereby minimizing manual analysis and disposal and reducing the risk of human misjudgment or operational errors.

[0051] 3. The train high-voltage power supply system fault handling method described in this application can avoid manual intervention when a high-voltage system fault occurs in the fully automatic driving mode, and improves the availability in the unmanned driving mode.

[0052] 4. The train high-voltage power supply system fault handling method described in this application can classify the faults of the train high-voltage power supply system. When the system detects multiple levels of faults, it can be handled according to the fault priority to ensure the safety and reliability of the train high-voltage power supply system to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] FIG1 is a schematic diagram of a high-voltage power supply system for a train provided by the present invention;

[0054] FIG2 is a schematic diagram of a method for handling a fault of a train high-voltage power supply system according to an embodiment of the present invention;

[0055] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0056] Explanation of main component symbols: 1-first pantograph, 2-second pantograph, 3-high-voltage busbar, 4-first train-level main circuit breaker, 5-second train-level main circuit breaker, 6-high-voltage disconnector, 7-first traction transformer, 8-second traction transformer, 9-third traction transformer, 10-first unit-level main circuit breaker, 11-second unit-level main circuit breaker, 12-third unit-level main circuit breaker, 13-first fault detection unit, 14-second fault detection unit, 15-third fault detection unit, 16-fourth fault detection unit, 17-fifth fault detection unit, 18-sixth fault detection unit, 19-seventh fault detection unit, 20-eighth fault detection unit, 21-ninth fault detection unit, 22-tenth fault detection unit, 23-first current transformer, 24-first voltage transformer, 25-second current transformer, 26-second voltage transformer. DETAILED DESCRIPTION

[0057] The term "comprising" in the specification, claims, and drawings of this application is synonymous with "including," "containing," or "characterized by," and is inclusive or open-ended and does not exclude additional unrecited elements or method steps. "Comprising" is a technical term used in claim language to mean that the recited elements are present, but other elements may be added and still form a structure or method within the scope of the claim.

[0058] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein may be combined with each other.

[0059] The following description sets forth numerous specific details to facilitate a thorough understanding of the present invention. The embodiments described are merely some, not all, of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0061] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0062] This application has discovered that the current EMU high-voltage topology uses a centralized control scheme for train-level main circuit breakers. A failure in any traction unit or high-voltage unit on the vehicle will cause the main circuit breaker to disconnect, resulting in a loss of power and the need for manual intervention. Based on EMU operating experience, traction system failures frequently cause the main circuit breaker to disconnect, which can have a serious impact on operations in fully autonomous driving mode. Even in manned driving mode, there is a risk of human misjudgment or operational error.

[0063] The present application provides a high-voltage power supply system for trains, employing a novel high-voltage topology. The system includes a train-level main circuit breaker and a unit-level main circuit breaker. The train-level main circuit breaker connects the pantograph to the high-voltage busbar, while the unit-level main circuit breaker connects the high-voltage busbar to the traction transformer within the traction unit. For example, as shown in Figure 1, a first pantograph 1 is connected to the high-voltage busbar 3 via a first train-level main circuit breaker 4, and a second pantograph 2 is connected to the high-voltage busbar 3 via a second train-level main circuit breaker 5. A high-voltage disconnector 6 is provided on the high-voltage busbar 3 between the first train-level main circuit breaker 4 and the second train-level main circuit breaker 5. Each traction transformer, its connected traction converter, and a charger or traction auxiliary converter constitute a traction unit. A unit-level main circuit breaker is provided between each traction transformer and the high-voltage busbar 3. For example, Figure 1 includes a first traction transformer 7, a second traction transformer 8, and a third traction transformer 9. A first unit-level main circuit breaker 10 is provided between the first traction transformer 7 and the high-voltage busbar 3. A second unit-level main circuit breaker 11 is provided between the second traction transformer 8 and the high-voltage busbar 3. A third unit-level main circuit breaker 12 is provided between the third traction transformer 9 and the high-voltage bus 3 .

[0064] The train high-voltage power supply system in this embodiment can disconnect the unit-level main circuit breaker to protect the train high-voltage power supply system when a traction system failure such as a traction transformer or traction converter occurs. At this time, only part of the power is lost, which improves the availability of the high-voltage system. In the fully automatic driving mode, manual intervention can be avoided after a high-voltage system failure occurs, and the availability is improved in the unmanned driving mode.

[0065] Circuit breakers are selected based on actual needs and are all conventional. For example, the train-level and unit-level main circuit breakers on fully autonomous vehicles powered by 25kV AC power are AC main breakers. The train operation control unit connects to the train-level main circuit breaker, high-voltage disconnect switches, and unit-level circuit breakers of each traction transformer through the Train Network Control System (TCMS), controlling the opening and closing of each circuit breaker and switch.

[0066] In this application, the train high-voltage power supply system is equipped with two pantographs. During the train operation, one pantograph is raised to connect to the power supply, and the other pantograph is on standby. In the event of a fault on the current pantograph side, the train control system can control the pantograph to be replaced.

[0067] As shown in FIG1 , a train high-voltage power supply system in the present application is further provided with a plurality of fault detection units. For example, as shown in FIG1 , a first fault detection unit 13 is provided between the first pantograph 1 and the first train-level main circuit breaker 4, a second fault detection unit 14 is provided between the second pantograph 2 and the second train-level main circuit breaker 5, a third fault detection unit 15 is provided on the high-voltage bus 3 between the first train-level main circuit breaker 4 and the high-voltage disconnector 6, and a fourth fault detection unit 16 is provided on the high-voltage bus 3 between the second train-level main circuit breaker 5 and the high-voltage disconnector 6. A fault detection unit is provided between each unit-level main circuit breaker and the high-voltage bus. For example, as shown in FIG1 , a fifth fault detection unit 17 is provided between the first unit-level main circuit breaker 10 and the high-voltage bus 3, a sixth fault detection unit 18 is provided between the second unit-level main circuit breaker 11 and the high-voltage bus 3, and a seventh fault detection unit 19 is provided between the third unit-level main circuit breaker 12 and the high-voltage bus 3. A fault detection unit is also provided between each traction transformer and the ground. For example, as shown in FIG1 , an eighth fault detection unit is provided between the first traction transformer 7 and the ground, a ninth fault detection unit 21 is provided between the second traction transformer 8 and the ground, and a tenth fault detection unit 22 is provided between the third traction transformer 9 and the ground.

[0068] In this embodiment, the first fault detection unit 13 and the second fault detection unit 14 can be configured as current transformers or voltage transformers. For example, as shown in FIG1 , the first fault detection unit 13 includes a first current transformer 23 and a first voltage transformer 24. The third fault detection unit 15, the fourth fault detection unit 16, the fifth fault detection unit 17, the sixth fault detection unit 18, and the seventh fault detection unit 19 can all be configured as current transformers. The eighth fault detection unit 20, the ninth fault detection unit 21, and the tenth fault detection unit 22 can all be configured as transformer ground return transformers.

[0069] In this application, the train operation control unit is connected to each fault detection unit through the train network control system TCMS for fault detection. For example, the following table shows a list of fault line sections, fault modes, fault section detection methods, and emergency measures.

[0070] The pantograph-raised side of the train mentioned in the above table refers to the high-voltage power supply circuit part on the high-voltage disconnector side connected to the pantograph after pantograph raising, including the pantograph, part of the high-voltage busbar, traction unit, train-level main circuit breaker, unit-level main circuit breaker, etc.

[0071] As shown in Figure 1, when the first pantograph 1 is operating, the circuit connected to the high-voltage disconnector 6 and close to the first pantograph 1 is the pantograph-raising side, including the first pantograph 1, the high-voltage busbar 3, the first fault detection unit 13, the first train-level main circuit breaker 4, the third fault detection unit 15, the fifth fault detection unit 17, the first unit-level main circuit breaker 10, the first traction transformer 7, the eighth fault detection unit 20, etc.; the non-pantograph-raising side is the circuit connected to the high-voltage disconnector 6 and away from the first pantograph, including the second pantograph 2, the high-voltage busbar 3, the second traction transformer 8, the third traction transformer 9, the second unit-level main circuit breaker 11, the third unit-level main circuit breaker 12, the second fault detection unit 14, the fourth fault detection unit 16, the sixth fault detection unit 18, the seventh fault detection unit 19, the ninth fault detection unit 21, and the tenth fault detection unit 22.

[0072] Correspondingly, when the second pantograph 2 is in operation, the circuit connected to the high-voltage disconnector 6 and close to the second pantograph 2 is the pantograph-raising side, and the circuit connected to the high-voltage disconnector 6 and away from the second pantograph 2 is the non-pantograph-raising side.

[0073] The table above provides a detailed classification of all possible faults that may occur in the train's high-voltage power supply system. It also uses fault detection equipment at all levels to accurately detect and locate the fault section and fault type, improving the reliability and comprehensiveness of fault handling.

[0074] The present invention provides a method for troubleshooting a high-voltage power supply system on a train, including the following steps:

[0075] S1: Classify the fault types of the high voltage power supply system;

[0076] S2: Determine whether a high voltage power supply system failure occurs;

[0077] S3: In response to a fault in the high-voltage power supply system, a fault line section is obtained; and corresponding protection measures are taken according to the fault type, the fault line section, and the fault classification of the fault type.

[0078] In step S1, this application categorizes the impact of a fault into three levels: minor, moderate, and severe, based on whether the fault causes the nearest station to be out of service, the terminal to be out of service, or whether it has no impact on traffic. A severe fault is considered a major fault if the fault causes the terminal to be out of service; a moderate fault is considered a minor fault if the fault has no impact on traffic, as shown in the table below.

[0079] For minor faults, if the fault occurs in the circuit section between the pantograph and the high-voltage busbar (including the high-voltage busbar), the train-level main circuit breaker and high-voltage disconnector will be closed, and the train-level main circuit breaker and high-voltage disconnector will be automatically closed after the fault is eliminated. If the fault occurs in a traction unit, the unit-level main circuit breaker of the faulty traction unit will be opened, and the unit-level main circuit breaker of the faulty traction unit will be automatically closed after the fault is eliminated.

[0080] In some other embodiments, the processing of minor faults further includes the steps of recording the fault (or storing the corresponding fault information) and prompting it on the display screen in the driver's cab.

[0081] For medium faults, if the fault occurs in the circuit section between the pantograph and the high-voltage busbar (including the high-voltage busbar), the faulty line section is identified, the faulty section is automatically disconnected, and the train-level main circuit breaker and unit-level main high-speed circuit breaker that are still functioning are closed. If the pantograph is not lowered during the fault handling process, operation is maintained; if the pantograph is lowered, manual intervention is required. If the fault occurs in the traction unit, the unit-level main circuit breaker of the traction unit where the fault occurred is disconnected, and the network is requested to disconnect the faulty equipment (such as an overcurrent converter). After the faulty equipment is disconnected, the unit-level main circuit breaker of the traction unit where the fault occurred is automatically closed.

[0082] For serious faults, if the fault occurs in the circuit section between the pantograph and the high-voltage busbar (including the high-voltage busbar), the faulty line section is identified, the faulty section is automatically disconnected, and the train-level main circuit breaker and unit-level main high-speed circuit breaker, which are still functioning normally, are closed. If the pantograph is not lowered during the fault handling process, operation is maintained; if the pantograph is lowered, manual intervention is required. If the fault occurs within a traction unit, the faulty line section is identified, the unit-level main circuit breaker of the faulty traction unit is disconnected, and the network is requested to disconnect the faulty equipment (such as the traction transformer). After the faulty equipment is disconnected, the unit-level main circuit breaker of the faulty traction unit remains disconnected.

[0083] If the same minor fault occurs multiple times within the first time, it will be upgraded to a moderate fault; if the same moderate fault occurs multiple times within the first time, it will be upgraded to a severe fault. The "first time" mentioned here can be 1 minute, 2 minutes, 5 minutes, 10 minutes, 15 minutes, 20 minutes, 25 minutes, 30 minutes, 1 hour, 2 hours, 3 hours, 4 hours, 5 hours, 6 hours, 7 hours, 8 hours, 9 hours, 10 hours, 11 hours, 12 hours, etc.

[0084] For example, this application provides a method for troubleshooting a high-voltage power supply system on a train, comprising the following steps:

[0085] S01: Classify the fault types of the high-voltage power supply system into three levels: minor fault, moderate fault, and severe fault;

[0086] S02: Determine whether a high-voltage power supply system fault has occurred. If no fault has occurred, proceed to step S03. If a fault has occurred, determine the type of fault. If the fault type is high-voltage bus grounding, proceed to step S04. If the fault type is traction converter four-quadrant input overcurrent, proceed to step S07.

[0087] S03: Close the unit-level main circuit breaker, high-voltage disconnector, and train-level main circuit breaker on the pantograph side in the traction unit, and the train operates normally;

[0088] S04: Based on the fault type and fault classification comparison table, it is determined that the high-voltage busbar grounding is a serious fault, and the high-voltage disconnector and the train-level main circuit breaker on the pantograph side are disconnected, the fault line section is identified, and the process proceeds to step S05;

[0089] Step S05: Determine whether the grounding section is on the pantograph raising side. If the grounding section is on the pantograph raising side, proceed to step S06. If the grounding section is on the pantograph non-raising side, proceed to step S03.

[0090] S06: A dialog box pops up on the train driver's cab display screen, suggesting pantograph operation and asking whether to execute it. After receiving the confirmation signal, the pantograph operation is automatically carried out, closing the high-voltage disconnector and the corresponding train-level main circuit breaker and each unit-level main circuit breaker on the pantograph raising side.

[0091] S07: According to the fault type and the fault classification comparison table, it is determined that the four-quadrant input overcurrent of the traction converter is a medium fault, and the unit-level main circuit breaker of the traction unit where the fault occurs is disconnected, and the process proceeds to step S08:

[0092] S08: Determine whether the main contactor of the converter of the traction unit where the fault occurs can be disconnected. If the main contactor of the converter can be disconnected within the second time, proceed to step S09; if the main contactor of the converter cannot be disconnected within the second time, proceed to step S10;

[0093] The second time can be 50ms-5s, for example: 50ms, 100ms, 200ms, 500ms, 750ms, 1s, 1.2s, 1.5s, 1.7s, 2s, 2.2s, 2.5s, 2.8s, 3s, 3.3s, 3.5s, 3.7s, 4s, 4.3s, 4.5s, 4.7s, 5s, etc.

[0094] In S08, if the main contactor of the converter in the faulty traction unit can be disconnected, the faulty device is disconnected and a fault disconnection signal is issued after the main contactor of the converter is disconnected. The unit-level main circuit breaker of the faulty traction unit can be closed by remotely resetting the device via the OCC or by pressing the reset button on the driver's console. If the main contactor of the converter in the faulty traction unit cannot be disconnected, the faulty device cannot be disconnected and the fault disconnection signal cannot be issued. Remote reset via the OCC or by pressing the reset button on the driver's console will not be successful.

[0095] S09: disconnecting the converter of the traction unit where the fault occurs, and closing the unit-level main circuit breaker of the traction unit where the fault occurs to maintain operation;

[0096] S10: The unit-level main circuit breaker of the traction unit where the fault occurs remains disconnected to maintain operation.

[0097] When it is determined that the high-voltage power supply system has multiple fault levels, faults with higher severity levels are processed first, that is, the priority of severe faults is higher than that of moderate faults, and the priority of moderate faults is higher than that of minor faults.

[0098] For example, if S02 determines that both a high-voltage busbar ground fault and a traction converter four-quadrant input overcurrent fault have occurred in the high-voltage power supply system, and the high-voltage busbar ground fault is a severe fault and the traction converter four-quadrant input overcurrent fault is a moderate fault, steps S04-S06 are prioritized, followed by steps S07-S10. This prioritized handling maximizes the safety and availability of the train's high-voltage power supply system.

[0099] In some embodiments, a controller is provided, which is a train operation control unit, or a module in the train operation control unit, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the method for handling a train high-voltage power supply system fault in the above-mentioned embodiment is implemented, such as the process shown in FIG2 . To avoid repetition, it is not described here. Accordingly, in an embodiment of the present application, a train is provided, including the controller described in the above-mentioned embodiment.

[0100] In one embodiment, a medium is provided, which is a computer-readable storage medium. A computer program is stored on the medium. When the computer program is executed by a processor, the method for handling faults of a high-voltage power supply system of a train in the above embodiment is implemented, such as the process shown in FIG2 . To avoid repetition, it will not be described here.

[0101] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0102] The fault handling method of the train high-voltage power supply system of the present application can autonomously identify fault information, take effective protection measures, cut off the faulty equipment, and automatically close the train circuit breaker when conditions are met, reducing manual analysis and disposal.

[0103] The above is a detailed introduction to the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application.

[0104] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference to the accompanying figures in the claims should not be regarded as limiting the claims involved. In addition, it is obvious that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices stated in the system claim may also be implemented by one unit or device through software or hardware. The words first, second, etc. are used to indicate names and do not indicate any particular order.

[0105] At the same time, for those skilled in the art, according to the concept of this application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A method for handling faults in a train high-voltage power supply system, characterized in that Including the following steps: Classify the fault types of the high-voltage power supply system according to the fault levels; Judge whether a fault occurs in the high-voltage power supply system; In response to a fault occurring in the high-voltage power supply system, obtain the fault line section, and take corresponding protection measures according to the fault type, the fault line section, and the fault level to which the fault type belongs.

2. The method for processing faults in a train high-voltage power supply system according to claim 1, characterized in that The fault levels are divided into three levels: severe fault, medium fault, and minor fault. The priority of severe fault is higher than that of medium fault, and the priority of medium fault is higher than that of minor fault. Faults with higher priority are processed first.

3. The method for processing faults in a train high-voltage power supply system according to claim 2, wherein If the same minor fault occurs multiple times within the first time interval, then this fault is upgraded to a medium fault; if the same medium fault occurs multiple times within the first time interval, then this fault is upgraded to a severe fault.

4. The method for processing faults in a train high-voltage power supply system according to claim 2, wherein The severe faults include: overcurrent faults in the circuit part between the pantograph and the high-voltage bus, transformer protection faults and four-quadrant input side grounding faults in the traction unit; The medium faults include: failure of the train-level main circuit breaker to operate and failure of the high-voltage disconnector to operate in the circuit part between the pantograph and the high-voltage bus, and four-quadrant input overcurrent faults and failure of the unit-level main circuit breaker to operate in the traction unit; The minor faults include: overvoltage faults of the network voltage in the circuit part between the pantograph and the high-voltage bus, frequent closing of the train-level main circuit breaker, and overvoltage faults of the traction unit network voltage, pre-charging faults and frequent closing of the unit-level circuit breaker in the traction unit.

5. A method for processing faults in a train high-voltage power supply system according to claim 2, characterized in that, It also includes the steps: According to the fault level being a minor fault and the fault occurring in the circuit part between the pantograph and the high-voltage bus, turn off the train-level main circuit breaker and the high-voltage disconnector on the high-voltage bus, and automatically close the train-level main circuit breaker and the high-voltage disconnector on the high-voltage bus after the fault is eliminated; According to the fault level being a minor fault and the fault occurring in the traction unit, disconnect the unit-level main circuit breaker of the faulty traction unit, and automatically close the unit-level main circuit breaker of the faulty traction unit after the fault is eliminated.

6. The method for processing faults in a train high-voltage power supply system according to claim 2, wherein, It also includes the steps; According to the fault level being a medium fault and the fault occurring in the circuit part between the pantograph and the high-voltage bus, automatically cut off the faulty line section, and close the train-level main circuit breaker and the unit-level main circuit breaker that can work normally; According to the fault level being a medium fault and the fault occurring in the traction unit, disconnect the unit-level main circuit breaker of the faulty traction unit, and request the network to cut off the faulty equipment. After the faulty equipment is cut off, automatically close the unit-level main circuit breaker of the faulty traction unit.

7. A method for handling faults in a train high-voltage power supply system according to claim 2, characterized in that, It also includes the steps; According to the fault level being a severe fault and the fault occurring in the circuit part between the pantograph and the high-voltage bus, automatically cut off the faulty line section, and close the train-level main circuit breaker and the unit-level main circuit breaker that can work normally; According to the fault classification as a serious fault, if the fault occurs within the traction unit, then disconnect the unit-level main circuit breaker of the faulty traction unit and request the network to cut off the faulty equipment; in response to the faulty equipment cut-off signal, close the unit-level main circuit breaker of the faulty traction unit; in response to the failure to cut off the faulty equipment within the second time, still keep the unit-level main circuit breaker of the faulty traction unit disconnected.

8. A method for processing faults in a train high-voltage power supply system according to claim 2, characterized in that, The steps for obtaining the faulty line section include: Obtain the running information of the train, where the running information includes the states of the train-level main circuit breaker, unit-level main circuit breaker, and high-voltage disconnector on the bus, as well as the detection data of several fault detection units; Based on the obtained running information, judge the faulty line section and fault mode in which the train's high-voltage power supply system is located.

9. A method for handling faults in a train high-voltage power supply system, characterized in that, It includes the following steps: Classify the fault types of the high-voltage power supply system into three levels: minor fault, medium fault, and serious fault; Judge whether the high-voltage power supply system has a fault; In response to the high-voltage power supply system not having a fault, close the unit-level main circuit breaker within the traction unit, the high-voltage disconnector on the bus, and the train-level main circuit breaker on the pantograph-raising side, and the train runs normally; In response to the high-voltage power supply system having a fault, judge the type of the fault. According to the fault type being high-voltage bus grounding and the fault type and fault classification comparison table, judge that high-voltage bus grounding belongs to a serious fault, then identify the faulty line section and disconnect the high-voltage disconnector on the bus and the train-level main circuit breaker on the pantograph-raising side; Judge whether the grounded section is on the pantograph-raising side; In response to the grounded section being on the pantograph-raising side, pop up a dialog box on the train driver's cab display screen, suggest running with a pantograph change, and ask whether to execute; and receive a confirmation signal from the train driver's cab display screen, automatically change the pantograph and run, and close the high-voltage disconnector on the bus and the corresponding train-level main circuit breaker and each unit-level main circuit breaker on the pantograph-raising side at this time; In response to the grounded section being on the non-pantograph-raising side, close the unit-level main circuit breaker within the traction unit, the train-level main circuit breaker on the pantograph-raising side, and keep the high-voltage disconnector on the bus disconnected, and the train maintains operation.

10. A method for processing faults in a train high-voltage power supply system, characterized in that, It includes the following steps: Classify the fault types of the high-voltage power supply system into three levels: minor fault, medium fault, and serious fault; Judge whether the high-voltage power supply system has a fault; In response to the high-voltage power supply system not having a fault, close the unit-level main circuit breaker within the traction unit, the high-voltage disconnector on the bus, and the train-level main circuit breaker on the pantograph-raising side, and the train runs normally; In response to the high-voltage power supply system having a fault, judge the type of the fault. According to the fault type being overcurrent at the four-quadrant input of the traction converter and the fault type and fault classification comparison table, judge that overcurrent at the four-quadrant input of the traction converter belongs to a medium fault; Identify the faulty line section, disconnect the unit-level main circuit breaker of the traction unit where the fault occurs, and judge whether the main contactor of the converter in the traction unit where the fault occurs can be disconnected; In response to the main contactor being able to be disconnected, disconnect the converter of the traction unit where the fault occurs and close the unit-level main circuit breaker of the traction unit where the fault occurs to maintain operation; In response to the main contactor failing to open, the unit-level main circuit breaker of the traction unit where the fault occurs is opened, and operation is maintained.

11. A controller, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the train high-voltage power supply system fault handling method according to any one of claims 1 to 10.

12. A train, characterized in that, The train includes the controller described in claim 11.

13. A medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the train high-voltage power supply system fault handling method according to any one of claims 1 to 10.

Images