A ground diagnosis method and device, electronic equipment and storage medium

Abstract

The application belongs to the technical field of EMU grounding fault diagnosis, and particularly relates to a grounding diagnosis method, device, electronic equipment and storage medium. The application can quickly and automatically locate the position where the fault occurs when the main circuit of the whole vehicle is connected together, can automatically and quickly locate the traction control unit of the grounding and prewarn the driver, improves the efficiency of troubleshooting the grounding fault in the after-sales service, and saves manpower and time. A grounding diagnosis method comprises the following steps: when receiving the grounding prewarning issued by any traction control unit, marking the traction control unit issuing the grounding prewarning as a first traction control unit; sending a grounding positioning instruction to the first traction control unit; sending a grounding fault re-diagnosis instruction to all traction control units; receiving the grounding fault re-diagnosis result fed back by each traction control unit, and determining the fault cause of the grounding prewarning according to the grounding fault re-diagnosis result fed back by each traction control unit.

Description

Technical Field

[0001] This invention belongs to the technical field of grounding fault diagnosis for high-speed trains, and specifically relates to a grounding diagnosis method, device, electronic equipment, and storage medium. Background Technology

[0002] With the rapid development of China's rail transit industry and network communication technology, the control and diagnostic functions of train network control systems on high-speed trains are becoming increasingly sophisticated, greatly facilitating driver control and after-sales maintenance. Currently, after a ground fault is reported in the traction control system of a high-speed train, after-sales personnel mainly rely on onboard inspection to locate the ground fault. For high-speed trains with isolation transformers installed on the auxiliary transformer output side, after-sales personnel do not need to inspect the entire traction system, resulting in a smaller workload and simpler troubleshooting. However, when no isolation transformer is installed on the auxiliary transformer output side, the main circuit of the entire train is connected together via auxiliary grid connection. After a ground fault is reported, the entire main circuit, including all traction control units, needs to be inspected, which is more difficult and requires a significant amount of manpower, resources, and time. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention proposes a grounding diagnosis method, device, electronic equipment, and storage medium. This application modifies the operating state of the traction control unit that issues the active grounding warning, then sends a fault re-diagnosis command to all traction control units, and finally performs fault analysis based on the fault re-diagnosis results fed back by each traction control unit. This enables rapid and automatic location of the fault when the vehicle's main circuit is connected to the grid via an auxiliary transformer, automatically and quickly locating the grounded traction control unit and issuing a warning to the driver, thus improving the efficiency of after-sales grounding fault troubleshooting and saving manpower and time.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention includes four aspects.

[0005] In a first aspect, a ground fault diagnosis method is provided, comprising: when a ground fault warning is received from any traction control unit, marking the traction control unit that issued the ground fault warning as a first traction control unit; sending a ground fault location command to the first traction control unit, wherein, upon receiving the ground fault location command, the first traction control unit controls the disconnection of the auxiliary output contactor and starts the fixed-frequency auxiliary transformer; sending a ground fault re-diagnosis command to all traction control units; receiving the ground fault re-diagnosis results fed back by each traction control unit, and determining the fault cause of the ground fault warning based on the ground fault re-diagnosis results fed back by each traction control unit.

[0006] In some embodiments, receiving the ground fault re-diagnosis results fed back by each traction control unit and determining the fault cause of the ground fault warning based on the ground fault re-diagnosis results fed back by each traction control unit includes: when only the ground fault re-diagnosis result of the first traction control unit is a valid ground fault warning among the ground fault re-diagnosis results fed back by each traction control unit, it is determined that the first traction control unit has a ground fault; when all the ground fault re-diagnosis results fed back by each traction control unit are invalid ground fault warnings, it indicates that no ground fault has occurred and it is a false alarm fault.

[0007] In some embodiments, receiving the ground fault re-diagnosis results fed back by each traction control unit and determining the fault cause of the ground fault warning based on the ground fault re-diagnosis results fed back by each traction control unit further includes: when at least one of the re-diagnosis results fed back by each traction control unit (excluding the first traction control unit) indicates that the ground fault warning is valid, sending a resumption command to the first traction control unit; removing the marking of the first traction control unit, and simultaneously selecting any traction control unit from the other unmarked traction control units to mark as the first traction control unit, sending a ground fault location command to the first traction control unit, and simultaneously sending a ground fault re-diagnosis command to all traction control units; after all traction control units have been marked, determining the fault cause of the ground fault warning based on the fault re-diagnosis results fed back multiple times by each traction control unit.

[0008] In some embodiments, determining the cause of the grounding warning based on the fault re-diagnosis results fed back by each traction control unit after all traction control units have been marked includes: forming a diagnostic table from the fault re-diagnosis results fed back by each traction control unit multiple times; analyzing the diagnostic table and determining the cause of the grounding warning.

[0009] In some embodiments, analyzing the diagnostic table and determining the cause of the grounding warning includes: if it is found that in each fault re-diagnosis result, except for the fault re-diagnosis result fed back by the first traction control unit which indicates that the grounding warning is invalid, the fault re-diagnosis results fed back by other traction control units all indicate that the grounding warning is valid, then it is determined that there is a grounding fault in the auxiliary load.

[0010] In some embodiments, the step of analyzing the diagnostic table and determining the cause of the grounding warning further includes: if it is found that in each fault re-diagnosis result, all fault re-diagnosis structures fed back by all traction control units are valid for grounding warning, then it is determined that all traction control units have grounding faults.

[0011] In some embodiments, the step of analyzing the diagnostic table and determining the cause of the grounding warning further includes: when it is found that in multiple fault re-diagnosis results, some traction control units report valid grounding warnings each time, while other traction control units report invalid grounding warnings when acting as the first traction control unit, then it is determined that the traction control unit whose fault re-diagnosis results are valid grounding warnings each time has a grounding fault.

[0012] Secondly, this application proposes a grounding diagnostic device, comprising: a first receiving module, configured to mark the traction control unit that issued the grounding warning as the first traction control unit when a grounding warning is received from any traction control unit; a first sending module, configured to send a grounding location command to the first traction control unit; a second sending module, configured to send a grounding fault re-diagnosis command to all traction control units; and a first diagnostic module, configured to receive the grounding fault re-diagnosis result fed back by each traction control unit, and determine the fault cause of the grounding warning based on the grounding fault re-diagnosis result fed back by each traction control unit.

[0013] A third aspect provides an electronic device including a storage device and a processor, the storage device storing a computer program, the processor executing the computer program to implement the steps of a grounding diagnostic method.

[0014] The fourth aspect provides a storage medium storing a computer program that can be executed by one or more processors, the computer program being able to implement the steps of any of the grounding diagnostic methods in the first aspect.

[0015] The beneficial effects of this invention are as follows: By changing the operating state of the traction control unit that issues the active grounding warning, this application sends a fault re-diagnosis command to all traction control units, and finally performs fault analysis based on the fault re-diagnosis results fed back by each traction control unit. This enables rapid and automatic location of the fault when the vehicle's main circuit is connected, automatically and quickly locating the grounded traction control unit and issuing a warning to the driver, thus improving the efficiency of after-sales grounding fault troubleshooting and saving manpower and time. Attached Figure Description

[0016] The scope of this disclosure can be better understood by reading the following detailed description of exemplary embodiments in conjunction with the accompanying drawings. The accompanying drawings are:

[0017] Figure 1 This is an overall flowchart of a grounding diagnosis method provided in an embodiment of this application;

[0018] Figure 2This is an overall block diagram of a grounding diagnostic device method provided in an embodiment of this application. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. The described embodiments should not be regarded as limitations on this application. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] In the following description, references are made to “some embodiments,” which describe a subset of all possible embodiments. However, it is understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0021] If the application documents contain similar descriptions such as "first, second, third", the following explanation shall be added: In the following description, the terms "first, second, third" are used only to distinguish similar objects and do not represent a specific order of objects. It is understood that "first, second, third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0023] This application is applied to EMUs, which use TCN (Train Communication Network, conforming to IEC 61375 standard) for vehicle control and have multiple carriages. The multiple carriages can be divided into multiple MVB (Multi-function Vehicle Bus, conforming to IEC 61375 standard) units. Each MVB unit contains multiple TCU (Train Control Unit), and each MVB unit uses the MVB (Multi-function Vehicle Bus, conforming to IEC 61375 standard) bus. Communication between two MVB units is achieved through WTB (Stranded Train Bus, conforming to IEC 61375 standard). The main circuit of the entire EMU is connected together via an auxiliary transformer.

[0024] Because the auxiliary transformer is connected to the grid and there is no isolation transformer on the output side of the auxiliary transformer, the main circuit of the whole vehicle is connected together through the auxiliary grid. Therefore, after a ground fault is reported, it is necessary to check the main circuit of the whole vehicle, including all traction control units. The troubleshooting is difficult and requires a lot of manpower, material resources and time.

[0025] Example 1:

[0026] In view of the problems existing in the background technology, such as Figure 1 As shown, this application provides a grounding diagnosis method, which is applied to electronic equipment in a high-speed train. The electronic equipment can be a server, mobile terminal, computer, cloud platform, or train control and management system, etc. The functions implemented by the device data processing provided in this application embodiment can be achieved by the processor of the electronic equipment calling program code. The program code can be stored in a computer storage medium. The following describes this application in detail using a train control and management system as the electronic equipment used in this application. The grounding diagnosis method includes:

[0027] Step S1: When a grounding warning is received from any traction control unit, the traction control unit that issued the grounding warning is marked as the first traction control unit.

[0028] In practice, each traction control unit diagnoses its own status. When a traction control unit detects a grounding signal, it will proactively send a grounding warning to the train control and management system. The train control and management system will then receive the grounding warning from the traction control unit. Since there are many traction control units, to facilitate identification, the train control and management system designates the traction control unit that issued the grounding warning as the first traction control unit.

[0029] Step S2: Send a grounding positioning command to the first traction control unit. Upon receiving the grounding positioning command, the first traction control unit controls the disconnection of the auxiliary output contactor and starts the fixed-frequency auxiliary transformer.

[0030] To determine whether the ground fault was transmitted by the first traction control unit, a ground fault location command needs to be sent to it. Upon receiving the ground fault location command, the first traction control unit disconnects the auxiliary output contactor and starts the fixed-frequency auxiliary transformer, thus preventing the first traction control unit from participating in the operation of the train and avoiding interference caused by its operation.

[0031] Step S3: Send a ground fault re-diagnosis command to all traction control units.

[0032] To confirm whether other traction control units have experienced grounding faults, the train control and management system sends a grounding fault re-diagnosis command to all traction control units. Upon receiving the command, each traction control unit performs a grounding fault diagnosis on itself and sends the results to the train control and management system.

[0033] Step S4: Receive the ground fault re-diagnosis results fed back by each traction control unit, and determine the fault cause of the ground fault warning based on the ground fault re-diagnosis results fed back by each traction control unit.

[0034] After the train control and management system receives the ground fault re-diagnosis results from each traction control unit, it analyzes the received ground fault re-diagnosis results to ultimately determine the cause of the ground fault warning and the location of the ground fault.

[0035] This application modifies the operating state of the traction control unit that issues the active grounding warning, then sends a fault re-diagnosis command to all traction control units, and finally performs fault analysis based on the fault re-diagnosis results fed back by each traction control unit. This enables rapid and automatic location of the fault when the vehicle's main circuits are connected, automatically and quickly locating the grounded traction control unit and issuing a warning to the driver, thus improving the efficiency of after-sales grounding fault troubleshooting and saving manpower and time.

[0036] In some embodiments, step S4, "receiving the ground fault re-diagnosis results fed back by each traction control unit and determining the fault cause of the ground fault warning based on the ground fault re-diagnosis results fed back by each traction control unit," includes:

[0037] Step S41: If only the ground fault re-diagnosis result of the first traction control unit is a valid ground fault warning among the ground fault re-diagnosis results fed back by each traction control unit, then it is determined that the first traction control unit has a ground fault.

[0038] When analyzing the received ground fault re-diagnosis results, it was found that when the first traction control unit was not involved in the operation of the EMU, its ground fault re-diagnosis results were still effective for ground warning, while the ground fault re-diagnosis results of other traction control units were ineffective for ground warning. Therefore, it can be determined that the first traction control unit had a ground fault.

[0039] Step S42: When the ground fault re-diagnosis results fed back by each traction control unit are all invalid ground fault warnings, it means that no ground fault has occurred and it is a false alarm fault.

[0040] However, sometimes, it is not just one traction control unit that has a ground fault, or the ground fault is not in the traction control unit. In this case, it is difficult to determine where the ground fault occurred based solely on the ground fault re-diagnosis results from a single feedback from the traction control unit.

[0041] Therefore, in some embodiments, step S4, "receiving the ground fault re-diagnosis results fed back by each traction control unit and determining the fault cause of the ground fault warning based on the ground fault re-diagnosis results fed back by each traction control unit," further includes:

[0042] Step S43: When at least one of the ground fault re-diagnosis results fed back by each traction control unit (excluding the first traction control unit) is a valid ground fault warning, a resumption command is sent to the first traction control unit.

[0043] Step S44: Remove the marking of the first traction control unit, and at the same time select any traction control unit from the other unmarked traction control units and mark it as the first traction control unit, send a grounding positioning command to the first traction control unit, and send a grounding fault re-diagnosis command to all traction control units.

[0044] Step S45: After all traction control units have been marked, determine the cause of the grounding warning based on the fault re-diagnosis results fed back by each traction control unit multiple times.

[0045] By polling, different traction control units are designated as the first traction control unit at different times. A ground fault location command is then sent to the first traction control unit, preventing it from participating in the train's operation during the ground fault re-diagnosis. This process obtains the ground fault re-diagnosis results from each traction control unit at different times. A polling cycle is considered complete only after all traction control units have been designated as the first traction control unit within a certain period. Finally, the location of the ground fault is determined based on the ground fault re-diagnosis results from each traction control unit at different times obtained through polling.

[0046] Generally, if the traction control unit does not experience a ground fault, when it disconnects the auxiliary output contactor and starts the fixed-frequency auxiliary transformer, its ground fault re-diagnosis result will be "ground fault warning invalid." However, if the traction control unit experiences a ground fault, its ground fault re-diagnosis result will be "ground fault warning valid." This is a general case. When the auxiliary load has a ground fault, regardless of whether the traction control unit experiences a ground fault, if the faulty traction unit participates in the train operation, its ground fault re-diagnosis result will be "ground fault warning valid." Whether in general or specific cases, when more than one traction control unit experiences a ground fault, or when the faulty unit is not a traction control unit, the data becomes very complex and difficult to analyze and process.

[0047] Therefore, in some embodiments, step S45, "after all traction control units have been marked, determining the cause of the grounding warning based on the fault re-diagnosis results fed back multiple times by each traction control unit," includes:

[0048] Step S451: Compile the fault re-diagnosis results fed back from each traction control unit multiple times into a diagnostic table.

[0049] Step S452: Analyze the diagnostic table and determine the cause of the grounding warning.

[0050] By establishing a diagnostic table, the ground fault re-diagnostic results fed back by different traction control units when they are used as the first traction control unit are summarized together, making it easy to determine the location of the ground fault through the diagnostic table.

[0051] Therefore, in some embodiments, step S452, "analyzing the diagnostic table and determining the cause of the grounding warning fault," includes:

[0052] Step S4521: If it is found that in each fault re-diagnosis result, except for the fault re-diagnosis result fed back by the first traction control unit which is invalid for grounding warning, the fault re-diagnosis results fed back by other traction control units are all valid for grounding warning, then it is determined that there is a grounding fault in the auxiliary load.

[0053] When an auxiliary load has a ground fault, the ground fault re-diagnosis result is a valid ground fault warning regardless of whether the traction control unit participates in the operation of the EMU. Furthermore, the ground fault re-diagnosis result fed back by the traction control unit is also a valid ground fault warning regardless of whether the traction control unit has a ground fault.

[0054] In some embodiments, analyzing the diagnostic table and determining the cause of the grounding warning further includes:

[0055] Step S4522: If it is found that in each fault re-diagnosis result, all traction control units report a valid grounding warning, then it is determined that all traction control units have a grounding fault.

[0056] In some embodiments, analyzing the diagnostic table and determining the cause of the grounding warning further includes:

[0057] Step S4523: When it is found that in multiple fault re-diagnosis results, some traction control units report valid grounding warnings each time, while other traction control units report invalid grounding warnings when acting as the first traction control unit, then it is determined that the traction control unit whose fault re-diagnosis results report valid grounding warnings each time has a grounding fault.

[0058] Therefore, this application uses a polling method to distribute ground fault re-diagnosis to all traction control units when each traction control unit is marked as the first traction control unit. Based on the final aggregated results of multiple ground fault re-diagnosis, the location of the ground fault is determined. This allows for automatic diagnosis of received ground fault warnings and automatic location of the ground fault. For EMUs where the main circuit of the entire trainset is connected to the grid only through auxiliary transformers and no isolation transformer is installed, this reduces the difficulty of ground fault investigation and saves significant manpower and resources. By polling each traction control unit and analyzing the diagnostic table, the accuracy and completeness of the final diagnostic results are ensured, avoiding errors or omissions caused by manual investigation, saving considerable time, and improving overall efficiency.

[0059] Example 2:

[0060] This embodiment further explains the grounding diagnosis method disclosed in Embodiment 1 and the grounding diagnosis method in the claims by way of example.

[0061] First, the example EMU consists of 6 carriages, with every three carriages forming an MVB unit. There are two MVB units: carriages 1-3 form the first MVB unit, and carriages 4-6 form the second MVB unit. Each MVB unit includes two TCUs (Traction Control Units), so this EMU has a total of 4 TCUs: TCU1, TCU2, TCU3, and TCU44.

[0062] Suppose TCU1 proactively sends a ground fault warning to TCMS (Train Control and Management System). At this time, TCMS marks TCU1 as the first traction control unit and sends a ground fault location command to TCU1. Upon receiving the ground fault location command, TCU1 disconnects the auxiliary output contactor and starts the fixed-frequency auxiliary transformer. Then, TCMS sends a ground fault re-diagnosis command to all TCUs and receives the ground fault re-diagnosis results from all TCUs. If only TCU1's ground fault re-diagnosis result indicates a valid ground fault warning, while the other TCUs' ground fault re-diagnosis results indicate an invalid ground fault warning, then it is determined that TCU1 has experienced a ground fault.

[0063] When the feedback ground fault re-diagnosis results show that, in addition to TCU1, other TCUs also report that the ground fault is valid, a polling strategy is initiated. The other TCUs are marked as the first traction control unit at different times, and the ground fault re-diagnosis results fed back by all TCUs at each time are received. Finally, a diagnosis table is formed from all the feedback ground fault re-diagnosis results.

[0064] If multiple TCUs have grounding faults, the diagnostic table is shown in Table 1.

[0065]

[0066] Table 1

[0067] In the table, 1 indicates a valid ground fault warning, and 0 indicates an invalid ground fault warning. As shown in Table 1, the re-diagnosis results for each ground fault are as follows: we found that when TCU2 and TCU3 disconnect the auxiliary output contactor (i.e., when TCU2 and TCU3 act as the first traction control unit), their feedback ground fault re-diagnosis results are invalid ground fault warnings. However, TCU1 and TCU4 consistently provide valid ground fault warnings regardless of the time of day. Therefore, we can determine from Table 1 that TCU1 and TCU4 experienced fault resolution.

[0068] Therefore, based on the situation in Table 1, when all TCUs have grounding faults, the diagnostic table is shown in Table 2:

[0069]

[0070] Table 2

[0071] As we can see from the ground fault re-diagnosis results in Table 2, TCU1, TCU2, TCU3, and TCU4 all reported valid ground fault warnings regardless of the time. Therefore, it can be determined that all four traction control units experienced ground faults.

[0072] When an auxiliary load experiences a ground fault, the diagnostic table is shown in Table 3:

[0073]

[0074] Table 3

[0075] As we can see from Table 3, when the TCU is in the state of disconnecting the auxiliary output contactor, that is, when the TCU is marked as the first traction control unit and a grounding positioning command is issued, the grounding fault re-diagnosis result fed back by the TCU is that the grounding warning is invalid. However, when the TCU participates in the operation of the EMU, the grounding fault re-diagnosis result fed back by it is that the grounding warning is valid. Therefore, it can be determined that no TCU has a grounding fault. Since the grounding fault actually exists at this time, it can be determined that the auxiliary load has a grounding fault.

[0076] Therefore, this application uses a polling method to distribute ground fault re-diagnosis to all traction control units when each traction control unit is marked as the first traction control unit. Based on the final aggregated results of multiple ground fault re-diagnosis, the location of the ground fault is determined. This allows for automatic diagnosis of received ground fault warnings and automatic location of the ground fault. For EMUs where the main circuit of the entire trainset is connected to the grid only through auxiliary transformers and no isolation transformer is installed, this reduces the difficulty of ground fault investigation and saves significant manpower and resources. By polling each traction control unit and analyzing the diagnostic table, the accuracy and completeness of the final diagnostic results are ensured, avoiding errors or omissions caused by manual investigation, saving considerable time, and improving overall efficiency.

[0077] Example 3:

[0078] Based on the foregoing embodiments, this application provides a grounding diagnostic device. The various modules and units included in the device can be implemented by a processor in a computer device; of course, they can also be implemented by specific logic circuits. In the implementation process, the processor can be a central processing unit (CPU), a microprocessor unit (MPU), a digital signal processor (DSP), or a field programmable gate array (FPGA), etc.

[0079] like Figure 2 As shown, a second aspect provides a grounding diagnostic device, including: a first receiving module 100, a second transmitting module 300, a first transmitting module 200, and a first diagnostic module 400.

[0080] The first receiving module 100 is used to mark the traction control unit that issued the ground fault warning as the first traction control unit when it receives a ground fault warning from any traction control unit. The first sending module 200 is used to send a ground fault location command to the first traction control unit. The second sending module 300 is used to send a ground fault re-diagnosis command to all traction control units. The first diagnosis module 400 is used to receive the ground fault re-diagnosis results fed back by each traction control unit, and determine the cause of the ground fault warning based on the ground fault re-diagnosis results fed back by each traction control unit.

[0081] In some embodiments, the first diagnostic module 400 includes: a first determining module and a second determining module.

[0082] The first determining module is used to determine that the first traction control unit has a ground fault when only the ground fault re-diagnosis result of the first traction control unit is a valid ground fault warning among the ground fault re-diagnosis results fed back by each traction control unit.

[0083] The second determining module is used to indicate that no ground fault has occurred and the fault is a false alarm when the ground fault re-diagnosis results fed back by each traction control unit are all invalid ground fault warnings.

[0084] In some embodiments, the first diagnostic module 400 further includes: a first execution module, a second execution module, and a second diagnostic module.

[0085] The first execution module is used to send a resumption command to the first traction control unit when at least one of the re-diagnosis results of the ground fault fed back by each traction control unit (excluding the first traction control unit) is a valid ground fault warning.

[0086] The second execution module is used to remove the marking of the first traction control unit, and at the same time select any traction control unit from the other unmarked traction control units to mark as the first traction control unit, and send a grounding positioning command to the first traction control unit, and at the same time send a grounding fault re-diagnosis command to all traction control units.

[0087] The second diagnostic module is used to determine the cause of the grounding warning based on the fault re-diagnosis results fed back by each traction control unit after all traction control units have been marked.

[0088] In some embodiments, the second diagnostic module includes a third execution module and a fourth diagnostic module.

[0089] The third execution module is used to generate a diagnostic table from the multiple fault re-diagnosis results fed back by each traction control unit.

[0090] The fourth diagnostic module is used to analyze the diagnostic table and determine the cause of the grounding warning.

[0091] In some embodiments, the fourth diagnostic module includes a third determination module.

[0092] The third determining module is used to determine that there is a grounding fault in the auxiliary load when it is found that, in each fault re-diagnosis result, except for the fault re-diagnosis result fed back by the first traction control unit which is invalid for grounding warning, all other fault re-diagnosis results fed back by the other traction control units are valid for grounding warning.

[0093] In some embodiments, the fourth diagnostic module further includes a fourth determination module.

[0094] The fourth determination module is used to determine that all traction control units have a grounding fault if it finds that in each fault re-diagnosis result, all fault re-diagnosis structures fed back by all traction control units are valid grounding warnings.

[0095] In some embodiments, the fourth diagnostic module further includes a fifth determination module.

[0096] The fifth determination module is used to determine that the traction control unit that always reports a valid grounding warning in multiple fault re-diagnosis results has a grounding fault when it is found that in multiple fault re-diagnosis results, some traction control units report valid grounding warnings in each fault re-diagnosis, while other traction control units report invalid grounding warnings when acting as the first traction control unit.

[0097] Therefore, this application uses a polling method to distribute ground fault re-diagnosis to all traction control units when each traction control unit is marked as the first traction control unit. Based on the final aggregated results of multiple ground fault re-diagnosis, the location of the ground fault is determined. This allows for automatic diagnosis of received ground fault warnings and automatic location of the ground fault. For EMUs where the main circuit of the entire trainset is connected to the grid only through auxiliary transformers and no isolation transformer is installed, this reduces the difficulty of ground fault investigation and saves significant manpower and resources. By polling each traction control unit and analyzing the diagnostic table, the accuracy and completeness of the final diagnostic results are ensured, avoiding errors or omissions caused by manual investigation, saving considerable time, and improving overall efficiency.

[0098] The modules in the aforementioned grounding diagnostic device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of the device in hardware form or independently of it, or stored in the memory of the processing device in software form, so that the processor can call and execute the operations corresponding to each module. It should be noted that the module division in this embodiment is illustrative and only represents a logical functional division; in actual implementation, there may be other division methods.

[0099] Example 4:

[0100] The third aspect provides an electronic device including a storage device and a processor, the storage device storing a computer program, the processor executing the computer program to implement the steps of a grounding diagnostic method.

[0101] Example 5:

[0102] The fourth aspect provides a storage medium storing a computer program that can be executed by one or more processors, the computer program being able to implement the steps of any of the grounding diagnostic methods in the first aspect.

[0103] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, or optical storage, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0104] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of this application, the sequence numbers of the above-described processes do not imply a sequential order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application. The sequence numbers of the above-described embodiments are merely descriptive and do not represent the superiority or inferiority of the embodiments.

[0105] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0106] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple units or components can be combined, or integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the various components shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be electrical, mechanical, or other forms.

[0107] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units. They may be located in one place or distributed across multiple network units. Some or all of the units may be selected to achieve the purpose of this embodiment according to actual needs.

[0108] In addition, each functional unit in the various embodiments of this application can be integrated into one processing unit, or each unit can be a separate unit, or two or more units can be integrated into one unit; the integrated unit can be implemented in hardware or in the form of hardware plus software functional units.

[0109] Those skilled in the art will understand that all or part of the steps of the above method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps of the above method embodiments. The aforementioned storage medium includes various media that can store program code, such as mobile storage devices, read-only memory (ROM), magnetic disks, or optical disks.

[0110] Alternatively, if the integrated units described above are implemented as software functional modules and sold or used as independent products, they can also be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of this application, or the parts that contribute to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a controller to execute all or part of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as mobile storage devices, ROMs, magnetic disks, or optical disks.

[0111] The above description is merely an embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A grounding diagnosis method, characterized in that, include: When a grounding warning is received from any traction control unit, the traction control unit that issued the grounding warning will be marked as the first traction control unit. A grounding positioning command is sent to the first traction control unit. Upon receiving the grounding positioning command, the first traction control unit controls the disconnection of the auxiliary output contactor and starts the fixed-frequency auxiliary transformer. Send a ground fault re-diagnosis command to all traction control units; Receive the ground fault re-diagnosis results from each traction control unit, and determine the fault cause of the ground fault warning based on the ground fault re-diagnosis results from each traction control unit; The process of receiving ground fault re-diagnosis results from each traction control unit and determining the cause of the ground fault warning based on these results includes: If, among the ground fault re-diagnosis results fed back by each traction control unit, only the ground fault re-diagnosis result of the first traction control unit is a valid ground warning, then it is determined that the first traction control unit has a ground fault. When the ground fault re-diagnosis results fed back by each traction control unit are all invalid ground fault warnings, it indicates that no ground fault has occurred and it is a false alarm fault. The step of receiving the ground fault re-diagnosis results from each traction control unit and determining the fault cause of the ground fault warning based on the ground fault re-diagnosis results from each traction control unit also includes: When at least one of the ground fault re-diagnosis results reported by each traction control unit is a valid ground fault warning (except for the first traction control unit), a resumption command is sent to the first traction control unit. Remove the marking of the first traction control unit, and at the same time select any traction control unit from the other unmarked traction control units and mark it as the first traction control unit, send a grounding positioning command to the first traction control unit, and send a grounding fault re-diagnosis command to all traction control units at the same time; After all traction control units have been marked, the cause of the grounding warning is determined based on the fault re-diagnosis results fed back from each traction control unit multiple times.

2. The grounding diagnosis method according to claim 1, characterized in that, After all traction control units have been marked, the cause of the grounding warning is determined based on the fault re-diagnosis results fed back from each traction control unit multiple times, including: The fault re-diagnosis results fed back from each traction control unit multiple times are compiled into a diagnostic table; The diagnostic table is analyzed to determine the cause of the grounding warning.

3. The grounding diagnosis method according to claim 2, characterized in that, The process of analyzing the diagnostic table and determining the cause of the grounding warning includes: If it is found that in each fault re-diagnosis result, except for the fault re-diagnosis result reported by the first traction control unit which indicates that the grounding warning is invalid, while the fault re-diagnosis results reported by other traction control units all indicate that the grounding warning is valid, then it is determined that there is a grounding fault in the auxiliary load.

4. A grounding diagnosis method according to claim 2, characterized in that, The process of analyzing the diagnostic table and determining the cause of the grounding warning also includes: If it is found that in each fault re-diagnosis result, all traction control units report a valid grounding warning, then it is determined that all traction control units have a grounding fault.

5. A grounding diagnosis method according to claim 2, characterized in that, The process of analyzing the diagnostic table and determining the cause of the grounding warning also includes: If, in multiple fault re-diagnosis results, some traction control units consistently report valid grounding warnings, while other traction control units, when acting as the first traction control unit, report invalid grounding warnings, then it is determined that the traction control unit reporting valid grounding warnings in each fault re-diagnosis is experiencing a grounding fault.

6. A grounding diagnostic device, characterized in that, include: The first receiving module is used to mark the traction control unit that issued the grounding warning as the first traction control unit when it receives a grounding warning from any traction control unit; The first transmitting module is used to send a grounding positioning command to the first traction control unit; The second transmitting module is used to send ground fault re-diagnosis commands to all traction control units; The first diagnostic module is used to receive the ground fault re-diagnosis results fed back by each traction control unit, and determine the fault cause of the ground fault warning based on the ground fault re-diagnosis results fed back by each traction control unit. The first diagnostic module includes: a first determination module and a second determination module; The first determining module is used to determine that the first traction control unit has a ground fault when only the ground fault re-diagnosis result of the first traction control unit is a valid ground fault warning among the ground fault re-diagnosis results fed back by each traction control unit. The second determining module is used to indicate that no ground fault has occurred and the fault is a false alarm when the ground fault re-diagnosis results fed back by each traction control unit are all invalid ground warnings. The first diagnostic module further includes: a first execution module, a second execution module, and a second diagnostic module; The first execution module is used to send a resumption command to the first traction control unit when at least one of the re-diagnosis results of the ground fault fed back by each traction control unit (excluding the first traction control unit) is a valid ground fault warning. The second execution module is used to remove the mark on the first traction control unit, and at the same time select any traction control unit from the other unmarked traction control units to mark it as the first traction control unit, send a grounding positioning command to the first traction control unit, and send a grounding fault re-diagnosis command to all traction control units at the same time. The second diagnostic module is used to determine the cause of the grounding warning based on the fault re-diagnosis results fed back by each traction control unit after all traction control units have been marked.

7. An electronic device, characterized in that, include: A memory and a processor, wherein the memory stores a computer program that, when executed by the processor, performs a grounding diagnostic method as described in any one of claims 1 to 5.

8. A storage medium, characterized in that, The computer program stored in the storage medium can be executed by one or more processors, and the computer program can be used to implement the steps of a grounding diagnostic method as described in any one of claims 1 to 5.

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