Fault diagnosis methods, devices, electronic equipment and storage media

Abstract

This invention provides a fault diagnosis method, apparatus, electronic device, and storage medium. The method is applied to the cooling system of a train including a converter. The method includes: acquiring first operating parameters related to the train; determining first state information of a first control command in the cooling system based on the first operating parameters; when the first state information indicates that the first control command is normal, acquiring second state information of a control component in the cooling system; determining whether the control component is faulty based on the second state information; when the second state information indicates that the control component is not faulty, acquiring operating parameters of the cooling system; determining third state information of a cooling component in the cooling system based on the operating parameters; and determining whether the cooling component is faulty based on the third state information.

Description

Technical Field

[0001] This invention relates to the field of locomotive manufacturing, and more specifically to a fault diagnosis method, device, electronic equipment, and storage medium. Background Technology

[0002] Cooling system control essentially involves using combinations of different types of switching components to control the start and stop of the cooling fan motor and cooling water pump motor. These same combinations also provide overload, short circuit, and phase loss protection for the motors. In related technologies, these switching components consist of miniature circuit breakers, three-pole contactors, and thermal relays, typically installed in the vehicle's mechanical compartment or electrical cabinet within the passenger compartment. This results in low self-diagnostic capabilities for cooling system control, increased labor costs, and poor online maintainability of the traction converter. Currently, there is no effective solution to this problem. Summary of the Invention

[0003] In view of this, the main objective of the present invention is to provide a fault diagnosis method, apparatus, electronic device and storage medium.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0005] This invention provides a fault diagnosis method applied to the cooling system of a train including a converter, the method comprising:

[0006] Obtain first operating parameters related to the train, and determine first state information of the first control command in the cooling system based on the first operating parameters;

[0007] When the first status information indicates that the first control command is normal, the second status information of the control component in the cooling system is obtained, and the control component is judged to be faulty based on the second status information.

[0008] If the second state information indicates that the control component is not faulty, the operating parameters of the cooling system are obtained, the third state information of the cooling component in the cooling system is determined based on the operating parameters, and the presence or absence of a fault in the cooling component is determined based on the third state information.

[0009] In the above scheme, the control component includes a first circuit breaker and a first control assembly; the first circuit breaker is connected to the first control assembly; the method further includes:

[0010] Acquire second operating parameters related to the train, and determine a second control command for the first control component based on the second operating parameters;

[0011] When the second operating parameter meets the first preset condition, the first circuit breaker is controlled to be in the conducting state based on the second control command.

[0012] If the second operating parameter does not meet the first preset condition, the first circuit breaker is controlled to be in the off state based on the second control command.

[0013] In the above scheme, the cooling system includes a first switching assembly; the first switching assembly is connected to the first control assembly; determining the second control command of the first control assembly based on the second operating parameters includes:

[0014] Obtain the third state information of the first switch component;

[0015] The second control command of the first control component is determined based on the third status information and the second operating parameters.

[0016] In the above scheme, the control component further includes a first contact, which is connected to the first control assembly; the step of acquiring the second state information of the control component in the cooling system and determining whether the control component is faulty based on the second state information includes:

[0017] Obtain the state information generated by the first contact when the state of the first contact point of the first contact changes;

[0018] Based on the status information generated by the first contact, it is determined that the first circuit breaker and the first control component are faulty.

[0019] In the above scheme, the cooling component includes a first phase winding, a second phase winding, a third phase winding, and a temperature sensing component; the temperature sensing component is disposed on the first phase winding, the second phase winding, and the third phase winding; the method further includes:

[0020] The temperature sensing component collects the first temperature corresponding to the first phase winding, the second temperature corresponding to the second phase winding, and the third temperature corresponding to the third phase winding.

[0021] Determine the absolute value of the difference between the first temperature and the second temperature, and the absolute value of the difference between the first temperature and the third temperature;

[0022] If the absolute value of the difference between the first temperature and the second temperature, and the absolute value of the difference between the first temperature and the third temperature are both greater than a preset temperature threshold, it is determined that the first phase winding has a fault.

[0023] In the above scheme, the control component further includes a first relay; the step of acquiring the second state information of the control component in the cooling system, and determining whether the control component is faulty based on the second state information, includes:

[0024] Obtain the state information generated by the first relay when the state of the second contact of the first relay changes;

[0025] Based on the status information generated by the first relay, it is determined that the first relay is faulty.

[0026] In the above scheme, the control component further includes a first contactor; the step of acquiring the second state information of the control component in the cooling system, and determining whether the control component is faulty based on the second state information, includes:

[0027] Obtain the state information generated by the first contactor when the state of the third contact of the first contactor changes;

[0028] Based on the status information generated by the first contactor, it is determined that the first contactor is faulty.

[0029] In the above scheme, the method further includes:

[0030] If the first status information indicates that the first control command is abnormal, the first operating parameters related to the train are reacquired, and the first status information of the first control command in the cooling system is determined based on the first operating parameters.

[0031] Determine the first number corresponding to the reacquisition of the first operating parameters related to the train;

[0032] If the first number of times exceeds a first preset threshold, a first fault message is generated to indicate that the first control command is abnormal.

[0033] In the above scheme, the method further includes:

[0034] If the second state information indicates that the control component is faulty, the second state information of the control component in the cooling system is reacquired, and the fault of the control component is determined based on the second state information.

[0035] Determine the second number corresponding to the reacquisition of the second state information of the control component in the cooling system;

[0036] If the second number of occurrences exceeds a second preset threshold, second fault information is generated to indicate that the control component has a fault.

[0037] In the above scheme, the method further includes:

[0038] If the third state information indicates that the cooling component is faulty, the operating parameters of the cooling system are reacquired, the third state information of the cooling component in the cooling system is determined based on the operating parameters, and the fault of the cooling component is determined based on the third state information.

[0039] Determine the third number corresponding to the reacquisition of the operating parameters of the cooling system;

[0040] If the third number is greater than a third preset threshold, a third fault information is generated to indicate that the cooling component has a fault.

[0041] This invention provides a fault diagnosis device applied to the cooling system of a train including a converter. The device includes:

[0042] The first determining module is used to acquire first operating parameters related to the train and determine first state information of the first control command in the cooling system based on the first operating parameters.

[0043] The second determining module is used to obtain the second state information of the control component in the cooling system when the first state information indicates that the first control command is normal, and to determine whether the control component is faulty based on the second state information.

[0044] The third determining module is used to obtain the operating parameters of the cooling system when the second state information indicates that the control component is not faulty, determine the third state information of the cooling component in the cooling system based on the operating parameters, and determine whether the cooling component is faulty based on the third state information.

[0045] This invention provides a fault diagnosis device, including a memory and a processor. The memory stores a computer program that can run on the processor. When the processor executes the program, it implements the method described in any of the above-mentioned embodiments.

[0046] This invention provides a storage medium storing executable instructions, which, when executed by a processor, implement the method described in any of the above embodiments.

[0047] This invention provides a fault diagnosis method, apparatus, electronic device, and storage medium. The method is applied to the cooling system of a train including a converter. The method includes: acquiring first operating parameters related to the train; determining first state information of a first control command in the cooling system based on the first operating parameters; when the first state information indicates that the first control command is normal, acquiring second state information of a control component in the cooling system; determining whether the control component is faulty based on the second state information; when the second state information indicates that the control component is not faulty, acquiring operating parameters of the cooling system; determining third state information of a cooling component in the cooling system based on the operating parameters; and determining whether the cooling component is faulty based on the third state information. By adopting the technical solution of this invention, and acquiring different state information of the cooling system, and determining whether different components in the cooling system are faulty based on the state information, self-diagnosis of different components in the cooling system can be performed, reducing the cost of manual fault diagnosis and ensuring the maintainability of the traction converter. Attached Figure Description

[0048] Figure 1 This is a schematic diagram illustrating the implementation process of the fault diagnosis method according to an embodiment of the present invention;

[0049] Figure 2 This is a schematic diagram illustrating the application of the cooling system of a train including a converter in the fault diagnosis method of this invention.

[0050] Figure 3 This is a schematic diagram of the control components in the cooling system of a train including a converter, as described in an embodiment of the fault diagnosis method of the present invention.

[0051] Figure 4 This is a schematic diagram of the control principle of a train cooling system including a converter, as described in an embodiment of the fault diagnosis method of the present invention.

[0052] Figure 5 This is another schematic diagram of the control principle of the cooling system of a train including a converter, which is part of the fault diagnosis method of this invention.

[0053] Figure 6 This is a flowchart illustrating a hybrid diagnostic method for the cooling system of a train, including a converter, according to an embodiment of the present invention.

[0054] Figure 7 This is a schematic diagram of the composition structure of the fault diagnosis device according to an embodiment of the present invention;

[0055] Figure 8 This is a schematic diagram of the hardware structure of a fault diagnosis device according to an embodiment of the present invention. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the specific technical solutions of the invention will be further described in detail below with reference to the accompanying drawings of the embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0057] The control of the traction converter and cooling system in rail transit vehicles is crucial to the effective heat dissipation of high-heat-flux-density power modules, magnetic components, and other heat-generating parts within the traction converter. Currently, high-power traction converters typically employ water cooling systems. Regardless of the overall cooling system assembly, it generally includes components such as cooling fans, cooling water pumps, radiators, and cooling pipes. The cooling fans and water pumps are usually supplied with three-phase AC power directly or indirectly by an auxiliary converter. Controlling the cooling system essentially involves using different combinations of switching components to control the start and stop of the cooling fan and water pump motors, while also providing overload, short-circuit, and phase-loss protection for the motors.

[0058] In related technologies, the switching components consist of miniature circuit breakers, three-pole contactors, thermal relays, etc., and are typically installed in the vehicle's mechanical compartment or electrical cabinet within the carriage. Since cooling fans and cooling water pumps are generally integrated into the traction converter, especially in distributed power EMUs where the traction converter is installed in the equipment compartment at the bottom of the vehicle, the electrical connection cables between the cooling fans and cooling water pumps and the switching components are excessively long. This leads to problems such as cumbersome wiring, a large number of interfaces, and high costs for both the vehicle and the traction converter. Related technical solutions include the following:

[0059] 1) The switching components that control the cooling system are not integrated inside the traction converter, but are located at the far end of the traction converter (e.g., in the locomotive mechanical room or the electrical cabinet of the EMU carriage), which increases the complexity of the traction converter interface and vehicle wiring.

[0060] 2) Circuit breakers, which control the cooling system, are usually used as short-circuit protection for motors. If they are simply installed inside the traction converter, they do not have the ability to be reset online after a fault trip or human error shutdown. If they are installed in the vehicle compartment or mechanical room electrical cabinet outside the traction converter, manual reset can be achieved by personnel. However, this method not only brings the disadvantage of complicated wiring, but also is not conducive to personnel safety.

[0061] 3) Thermal relays, commonly used in the switching components controlling the cooling system, are typically employed for overload and phase loss protection of motors. Firstly, the setting value (i.e., setting current) and thermal trip level must be carefully selected based on the load characteristics corresponding to the electrical parameters of the load motor. Incorrect selection can easily lead to no protection or false protection. The setting current is largely chosen based on engineering experience; if the setting value is too high, protection will fail when a true phase loss occurs; if the setting value is too low, false protection may occur. Furthermore, current thermal relays offer various thermal trip levels, each corresponding to different trip times. If the thermal trip level is not selected appropriately, the actual phase loss may not be protected in time due to tripping delays, potentially causing motor burnout. Secondly, using discrete thermal relays increases the number of switching components used in the cooling system control, complicating wiring. Thirdly, thermal relays cannot pinpoint phase loss. Although thermal-magnetic motor protection circuit breakers exist, possessing thermal-magnetic, phase loss, and short-circuit protection functions, they still require manual reset and similarly cannot pinpoint phase loss.

[0062] 4) The relevant technologies are limited to implementing the basic control functions of the cooling system, and there are few cases that systematically introduce the control devices of the cooling system and their fault diagnosis methods.

[0063] The related technologies include the following drawbacks:

[0064] First, if the switching components that control the cooling system are installed at the far end of the converter, there will be problems such as complicated wiring, a large number of interfaces, high cost, and risks to personal safety in the vehicle and the converter. If they are simply installed inside the converter, they will not have the ability to be reset online after a fault trip or human error shutdown.

[0065] Secondly, the switching components that control the cooling system are complex and rely heavily on their inherent physical characteristics to achieve the protection of the cooling fan motor and cooling water pump motor. As a result, the real-time self-control capability of the cooling system is poor, which is not conducive to intelligent control. Furthermore, the level of fault self-diagnosis is low, which increases labor costs and makes the online operation and maintainability of the traction converter poor.

[0066] To address the shortcomings of the aforementioned related technologies, embodiments of the present invention provide a fault diagnosis method, device, electronic equipment, and storage medium, which can simplify converter interfaces, save vehicle wiring costs, improve the self-diagnosis and intelligence levels of the cooling system, and improve the maintainability of the traction converter.

[0067] This invention proposes a fault diagnosis method. The function implemented by this method can be achieved by the processor in the fault diagnosis device calling program code. Of course, the program code can be stored in the computer storage medium. It can be seen that the computing device includes at least a processor and a storage medium.

[0068] Figure 1 This is a schematic diagram illustrating the implementation process of the fault diagnosis method according to an embodiment of the present invention, such as... Figure 1 As shown, the method is applied to the cooling system of a train including a converter, and the method includes:

[0069] Step 101: Obtain the first operating parameters related to the train, and determine the first state information of the first control command in the cooling system based on the first operating parameters;

[0070] Step 102: When the first status information indicates that the first control command is normal, obtain the second status information of the control component in the cooling system, and determine whether the control component is faulty based on the second status information;

[0071] Step 103: If the second state information indicates that the control component is not faulty, obtain the operating parameters of the cooling system, determine the third state information of the cooling component in the cooling system based on the operating parameters, and determine whether the cooling component is faulty based on the third state information.

[0072] In step 101, the fault diagnosis method can be determined according to the actual situation and is not limited here. As an example, the fault diagnosis method can be a self-diagnosis method for the control system of cooling components in a cooling system.

[0073] The cooling system can be determined according to actual conditions and is not limited here. As an example, the cooling system can be a control system for controlling the cooling components in the cooling system. Figure 2 This is a schematic diagram illustrating the application of the fault diagnosis method of the present invention to the cooling system of a train including a converter, as shown in the embodiment of the invention. Figure 2As shown, the cooling system 30 includes at least a traction control unit 301, a control component 302, and a cooling component 303. The traction control unit 301 is connected to both the control component 302 and the cooling component 303, and the control component 302 is connected to the cooling component 303. The traction control unit 301 sends relevant control commands to the control component 302, receives digital feedback signals corresponding to relevant status information sent by the control component 302, and receives pressure and temperature analog signals corresponding to attribute parameters sent by the cooling component 303. The control component 302 controls the opening and closing of the cooling component 303 based on the relevant control commands, thereby not only controlling and protecting the cooling component 303 from failure, but also achieving heat dissipation through the cooling system 30. The cooling component 303 includes at least a cooling fan, a cooling water pump, cooling pipes, a radiator, and temperature and pressure sensors. The pressure and temperature signals of the cooling component 303 are transmitted to the traction control unit 301 via hardwired connections.

[0074] It should be noted that the cooling system 30 is powered by the power supply device 20; wherein, the power supply device 20 includes: an on-board battery and an auxiliary converter; the cooling system 30 also interacts with the vehicle network system 10 related to the train through their respective Ethernet interfaces.

[0075] The converter can be determined according to the actual situation and is not limited here. As an example, the converter can be a traction converter, which includes at least an auxiliary converter and a traction inverter.

[0076] The first operating parameter can be determined according to the actual situation and is not limited here. As an example, the first operating parameter may include at least the speed parameters related to the train, the operating status of the converter, the attribute parameters of the converter, the operating status of the cooling system, and the attribute parameters of the cooling components in the cooling system.

[0077] The train-related speed parameters can be the train's operating speed. The converter's operating state can be the operating state of the traction inverter. The converter's attribute parameters can be the output voltage of the auxiliary converter. The cooling system's operating state can be the operating state of the cooling components in the cooling system, specifically the operating state of the cooling fan motor and / or the cooling water pump motor. The attribute parameters of the cooling components in the cooling system can be one or more of the following: the temperature parameters of the cooling fan motor windings, the temperature parameters of the cooling water pump motor windings, the temperature and pressure parameters of the inlet of the cooling pipe (including coolant) in the cooling water pump, and the temperature and pressure parameters of the outlet of the cooling pipe (including coolant) in the cooling water pump.

[0078] The acquisition of the first operating parameters related to the train may include: acquiring the speed parameters related to the train; determining the operating state of the cooling system based on the speed parameters related to the train; acquiring the operating state of the converter; acquiring the attribute parameters of the converter; and acquiring the attribute parameters of the cooling components in the cooling system.

[0079] The acquisition of the speed parameters related to the train can be achieved by obtaining the train's operating speed in real time from the vehicle network system related to the train. The determination of the cooling system's operating state based on the train-related speed parameters can be as follows: if the train-related speed parameters persist for a preset time greater than or equal to a speed threshold, the cooling system is determined to be in an "on" state; if the train-related speed parameters persist for a preset time less than the speed threshold, the cooling system is determined to be in a "off" state. The speed threshold and the preset time can be determined based on actual conditions and are not limited here.

[0080] The first control command can be determined according to the actual situation and is not limited here. As an example, the first control command can be a command to control the cooling fan motor to run at low speed, a command to control the cooling fan motor to run at high speed, a command to control the cooling water pump motor to run, a command to control the first control component to turn on, a command to control the second control component to turn on, a command to control the first control component to turn off, or a command to control the second control component to turn off.

[0081] The first state information of the first control command can be information representing whether the first control command is used to control the control component in the cooling system to be in a conducting or de-conducting state. Determining the first state information of the first control command in the cooling system based on the first operating parameters can involve: determining whether the train-related speed parameters are greater than or equal to the speed threshold; determining whether the converter's operating state is in the on state; determining whether the converter's attribute parameters meet the voltage condition; determining whether the cooling system's operating state is in the off state; determining whether the attribute parameters of the cooling component in the cooling system meet the attribute condition; and determining the first state information of the first control command in the cooling system when the train-related speed parameters are greater than or equal to the speed threshold, the converter's operating state is in the on state, the converter's attribute parameters meet the voltage condition, the cooling system's operating state is in the off state, and the attribute parameters of the cooling component in the cooling system meet the attribute condition. The first state information of the first control command can be information representing whether the first control command is used to control the control component in the cooling system to be in a conducting state.

[0082] The voltage condition can be determined according to actual conditions and is not limited here. As an example, the voltage condition may be that the output voltage of the converter is not zero. The attribute condition can be determined according to actual conditions and is not limited here. As an example, the attribute condition may be a temperature threshold and a pressure threshold. Determining whether the attribute parameters of the cooling components in the cooling system meet the attribute conditions may involve determining whether the temperature parameter of the cooling components in the cooling system is less than the temperature threshold, and determining whether the pressure parameter of the cooling components in the cooling system is greater than the pressure threshold.

[0083] In step 102, the first status information indicating that the first control command is in a normal state can be determined by judging whether the first status information indicates that the first control command is used to control the control component in the cooling system to be in a conductive state; if the first status information indicates that the first control command is used to control the control component in the cooling system to be in a conductive state, then the first control command is determined to be in a normal state.

[0084] The second state information of the control component can be information indicating whether the control component is in an on or off state. Obtaining the second state information of the control component in the cooling system can be obtaining information about whether the control component in the cooling system is in an on or off state.

[0085] The step of determining whether the control component is faulty based on the second state information can be as follows: determine whether the control component corresponding to the second state information has changed state; if the control component corresponding to the second state information has changed state, determine that the control component is faulty; if the control component corresponding to the second state information has not changed state, determine that the control component is not faulty.

[0086] In practical applications, the control component can be a first circuit breaker, a first relay, or a first contactor. The step of determining whether the control component is faulty based on the second state information can be: determining whether the first circuit breaker is faulty based on the second state information; determining whether the first relay is faulty based on the second state information; or determining whether the first contactor is faulty based on the second state information.

[0087] In step 103, the operating parameters can be determined according to actual conditions and are not limited here. As an example, the operating parameters may include at least the attribute parameters of the converter and the attribute parameters of the cooling components in the cooling system.

[0088] The attribute parameters of the converter can be the output voltage of the auxiliary converter. The attribute parameters of the cooling components in the cooling system can be one or more of the following: the temperature parameters of the cooling fan motor windings, the temperature parameters of the cooling water pump motor windings, the temperature and pressure parameters of the inlet of the cooling pipe including the coolant in the cooling water pump, and the temperature and pressure parameters of the outlet of the cooling pipe including the coolant in the cooling water pump.

[0089] Obtaining the operating parameters of the cooling system can be achieved by obtaining the attribute parameters of the converter or the attribute parameters of the cooling components in the cooling system.

[0090] The third state information of the cooling component can be information indicating whether the cooling component is in an on or off state. Determining the third state information of the cooling component in the cooling system based on the operating parameters can involve: determining whether the attribute parameters of the converter meet the voltage condition; determining whether the attribute parameters of the cooling component in the cooling system meet the operating conditions; and determining the third state information of the cooling component in the cooling system if the attribute parameters of the converter meet the voltage condition and the attribute parameters of the cooling component in the cooling system meet the attribute operating conditions. The third state information of the cooling component can be information indicating that the cooling component is in an on state.

[0091] The voltage condition can be determined according to actual conditions and is not limited here. As an example, the voltage condition may be that the output voltage of the converter is not zero. The operating conditions can be determined according to actual conditions and are not limited here. As an example, the operating conditions may be an operating temperature range and an operating pressure range. Determining whether the attribute parameters of the cooling components in the cooling system meet the attribute conditions may involve determining whether the temperature parameters of the cooling components in the cooling system meet the operating temperature range, and determining whether the pressure parameters of the cooling components in the cooling system meet the operating pressure range.

[0092] The step of determining whether the cooling component is faulty based on the third state information can be as follows: determine whether the third state information indicates that the cooling component is in an on state; if the third state information indicates that the cooling component is in an on state, determine that the third control command is normal; if the third state information indicates that the cooling component is in a off state, determine that the third control command is abnormal.

[0093] By adopting the technical solution of the present invention, different status information of the cooling system is obtained, and the presence of faults in different components of the cooling system is determined based on the status information. This enables self-diagnosis of different components in the cooling system, reduces the cost of manual fault diagnosis, and ensures the maintainability of the traction converter.

[0094] In an optional embodiment of the present invention, the control component includes a first circuit breaker and a first control assembly; the first circuit breaker is connected to the first control assembly; the method further includes:

[0095] Acquire second operating parameters related to the train, and determine a second control command for the first control component based on the second operating parameters;

[0096] When the second operating parameter meets the first preset condition, the first circuit breaker is controlled to be in the conducting state based on the second control command.

[0097] If the second operating parameter does not meet the first preset condition, the first circuit breaker is controlled to be in the off state based on the second control command.

[0098] In this embodiment, the first control component can be determined according to actual conditions, and is not limited here. As an example, the first control component can be a component used to receive the first control command and control the first circuit breaker to be in an on or off state based on the first control command.

[0099] The second operating parameter can be determined based on actual conditions and is not limited here. As an example, the second operating parameter can be a parameter used to characterize the operating state of the first circuit breaker.

[0100] Obtaining the second operating parameter related to the train can involve acquiring parameters related to the train that characterize the operating state of the first circuit breaker. The operating state of the first circuit breaker can be either a conducting state or a closed state.

[0101] The second control command can be determined according to the actual situation and is not limited here. As an example, the second control command can be used to control the first circuit breaker to be in the on or off state.

[0102] The instruction for determining the second control component based on the second operating parameters can be an instruction from the first control component to control the first circuit breaker to be in an off or on state, based on parameters of the operating state of the first circuit breaker.

[0103] The first preset condition can be determined according to the actual situation and is not limited here. As an example, the first preset condition may be that the first circuit breaker is in the off state. The second operation...

[0104] When the parameters meet the first preset condition, controlling the first circuit breaker to be in the conducting state based on the second control command can be equivalent to controlling the first circuit breaker to be in the conducting state based on the second control command when the first circuit breaker is in the off state. Conversely, when the second operating parameters do not meet the first preset condition, controlling the first circuit breaker to be in the off state based on the second control command when the first circuit breaker is in the conducting state.

[0105] In this embodiment, when the traction converter is in the factory condition and when the circuit breaker is in the cooling system failure condition, the circuit breaker is in the off state and needs to be reset. The first circuit breaker is controlled to be in the on state based on the second control command. When the cooling system fails but the circuit breaker's own tripping condition is not triggered, and the circuit breaker needs to be forcibly disconnected, the first circuit breaker is controlled to be in the off state based on the second control command.

[0106] In an optional embodiment of the present invention, the cooling system includes a first switching assembly; the first switching assembly is connected to a first control assembly; the step of determining a second control command for the first control assembly based on the second operating parameters includes:

[0107] Obtain the third state information of the first switch component;

[0108] The second control command of the first control component is determined based on the third status information and the second operating parameters.

[0109] In this embodiment, the cooling system may include a traction control unit, which includes the first switching assembly. The first switching assembly may be a relay in the traction converter, where an output of 0 indicates an open state and an output of 1 indicates a closed state. The first switching assembly can be determined according to actual conditions and is not limited here. As an example, the first switching assembly may be a component for receiving the second operating parameters and determining the second control command based on the second operating parameters.

[0110] The third state information can be determined based on actual circumstances and is not limited here. As an example, the third state information can be information used to characterize the operating state of the first switching component. Obtaining the third state information of the first switching component can be obtaining information about the operating state of the first switching component. The operating state of the first switching component can be an on state or an off state.

[0111] The step of determining the second control instruction of the first control component based on the third state information and the second operating parameters can be, based on the operating state parameters of the first circuit breaker and the operating state information of the first switch component, determining the instruction of the first control component for controlling the first circuit breaker to be in the off state or the on state.

[0112] In an optional embodiment of the present invention, the control component further includes a first contact, the first contact being connected to the first control component; the step of acquiring second state information of the control component in the cooling system and determining whether the control component is faulty based on the second state information includes:

[0113] Obtain the state information generated by the first contact when the state of the first contact point of the first contact changes;

[0114] Based on the status information generated by the first contact, it is determined that the first circuit breaker and the first control component are faulty.

[0115] In this embodiment, the first contact can be determined according to actual conditions, and is not limited here. As an example, the first contact can be an auxiliary contact, which can be a component used to determine whether the first circuit breaker and the first control component are faulty based on whether the first contact point of the auxiliary contact changes.

[0116] The first contact point can be determined according to the actual situation and is not limited here. As an example, the first contact point can be a normally closed contact, that is, the state of the first contact point is normally closed. The step of obtaining the state information generated by the first contact point when the state of the first contact point changes can be to obtain the state information generated by the first contact point when the normally closed state of the first contact point changes to the normally open state.

[0117] The status information generated by the first contact can be determined according to the actual situation and is not limited here. As an example, the status information generated by the first contact can be normally open status information. Determining that the first circuit breaker and the first control component are faulty based on the status information generated by the first contact can be done by determining that the first circuit breaker and the first control component are faulty based on the normally open status information generated by the first contact.

[0118] In some embodiments, the control components include at least a first circuit breaker QF1, a first control component YK1, a first auxiliary contact AS1, a second circuit breaker QF2, a second control component YK2, a second auxiliary contact AS2, a third circuit breaker QF3, a third control component YK3, and a third auxiliary contact AS3. Figure 3 This is a schematic diagram of the control components in the cooling system of a train including a converter, as shown in the embodiment of the fault diagnosis method of the present invention. Figure 3 As shown, the control component 302 includes a mounting plate 1000, on which a switch component 100 is provided. The switch component 100 includes at least a first circuit breaker 1001, a first control component 1002, a first auxiliary contact 1003, a second circuit breaker 1004, a second control component 1005, a second auxiliary contact 1006, a third circuit breaker 1007, a third control component 1008, and a third auxiliary contact 1009. All of the above components are fixed by being snapped into the guide rail of the mounting plate 1000. It should be noted that the first circuit breaker 1001 and the first control component 1002 are mechanically connected via an adapter, the second circuit breaker 1004 and the second control component 1005 are mechanically connected via an adapter, and the third circuit breaker 1007 and the third control component 1008 are mechanically connected via an adapter. It can be understood that the first circuit breaker 1001 and the first control component 1002 provide status feedback through the first auxiliary contact 1003; the second circuit breaker 1004 and the second control component 1005 provide status feedback through the second auxiliary contact 1006; and the third circuit breaker 1007 and the third control component 1008 provide status feedback through the third auxiliary contact 1009.

[0119] like Figure 3 As shown, the control component 302 includes at least a low-voltage connection assembly 200 for signal connection, a terminal block assembly 300 for component wiring, and a medium-voltage input terminal 900 for power supply. The terminal block assembly 300 includes a positive voltage zone terminal block 3001, a negative voltage zone terminal block 3002, and a zero voltage zone terminal block 3003, all of which are fixedly engaged with the guide rails of the mounting plate 1000.

[0120] In an optional embodiment of the present invention, the cooling component includes a first phase winding, a second phase winding, a third phase winding, and a temperature sensing component; the temperature sensing component is disposed on the first phase winding, the second phase winding, and the third phase winding; the method further includes:

[0121] The temperature sensing component collects the first temperature corresponding to the first phase winding, the second temperature corresponding to the second phase winding, and the third temperature corresponding to the third phase winding.

[0122] Determine the absolute value of the difference between the first temperature and the second temperature, and the absolute value of the difference between the first temperature and the third temperature;

[0123] If the absolute value of the difference between the first temperature and the second temperature, and the absolute value of the difference between the first temperature and the third temperature are both greater than a preset temperature threshold, it is determined that the first phase winding has a fault.

[0124] In this embodiment, the first phase winding can be determined according to actual conditions and is not limited here. As an example, the first phase winding can be any one of the U-phase winding, V-phase winding, or W-phase winding. The second phase winding can be determined according to actual conditions and is not limited here. As an example, the second phase winding can be any one of the V-phase winding, W-phase winding, or U-phase winding. The third phase winding can be determined according to actual conditions and is not limited here. As an example, the third phase winding can be any one of the W-phase winding, U-phase winding, or V-phase winding.

[0125] The temperature sensing component can be determined according to actual conditions and is not limited here. As an example, the temperature sensing component can be a temperature sensor. The temperature sensing component can be disposed on the first phase winding, the second phase winding, and the third phase winding. Specifically, the temperature sensing component can be disposed on the first phase winding, the second phase winding, and the third phase winding of the cooling water pump motor and the first phase winding, the second phase winding, and the third phase winding of the cooling fan motor. That is, the temperature sensing component is embedded in the three-phase winding of the cooling water pump motor and the temperature sensing component is embedded in the three-phase winding of the cooling fan motor.

[0126] The step of acquiring the first temperature corresponding to the first phase winding, the second temperature corresponding to the second phase winding, and the third temperature corresponding to the third phase winding through the temperature sensing component can be as follows: acquiring the first temperature A corresponding to the U-phase winding, the second temperature B corresponding to the V-phase winding, and the third temperature C corresponding to the W-phase winding through the temperature sensing component; acquiring the first temperature B corresponding to the V-phase winding, the second temperature C corresponding to the W-phase winding, and the third temperature A corresponding to the U-phase winding through the temperature sensing component; or acquiring the first temperature C corresponding to the W-phase winding, the second temperature A corresponding to the U-phase winding, and the third temperature B corresponding to the V-phase winding through the temperature sensing component.

[0127] The preset temperature threshold can be determined according to the actual situation and is not limited here. As an example, the preset temperature threshold can be a protection threshold D of the absolute value of the difference between any two of the first temperature, the second temperature, and the third temperature.

[0128] Determining the absolute value of the difference between the first temperature and the second temperature, and the absolute value of the difference between the first temperature and the third temperature, can be done by determining the absolute value of the difference between the first temperature A and the second temperature B, |AB|, and the absolute value of the difference between the first temperature A and the third temperature C, |AC|; it can also be done by determining the absolute value of the difference between the first temperature B and the second temperature C, |BC|, and the absolute value of the difference between the first temperature B and the third temperature A, |AB|; or it can be done by determining the absolute value of the difference between the first temperature C and the second temperature A, |AC|, and the absolute value of the difference between the first temperature C and the third temperature B, |BC|.

[0129] The presence of a fault in the first phase winding can be determined based on the actual situation and is not limited here. As an example, a fault in the first phase winding could be a missing phase in the first phase winding.

[0130] The determination that the first phase winding is faulty when the absolute values ​​of the differences between the first and second temperatures and the third temperature are both greater than a preset temperature threshold can be as follows: The U-phase winding is faulty when the absolute values ​​of the differences between the first temperature A and the second temperature B (|AB|) and the third temperature C (|AC|) are both greater than a preset temperature threshold D. Alternatively, the V-phase winding is faulty when the absolute values ​​of the differences between the first temperature B and the second temperature C (|BC|) and the third temperature A (|AB|) are both greater than a preset temperature threshold D. Furthermore, the W-phase winding is faulty when the absolute values ​​of the differences between the first temperature C and the second temperature A (|AC|) and the third temperature B (|BC|) are both greater than a preset temperature threshold D.

[0131] In some embodiments, the absolute value of the difference between the second temperature and the third temperature is determined; if the absolute values ​​of both the difference between the first temperature and the second temperature and the difference between the first temperature and the third temperature are greater than a preset temperature threshold, it is determined whether the absolute value of the difference between the second temperature and the third temperature is less than the preset temperature threshold; if the absolute value of the difference between the second temperature and the third temperature is less than the preset temperature threshold, it is determined that the first phase winding has a fault.

[0132] The absolute value of the difference between the second temperature and the third temperature being less than the preset temperature threshold can be: the absolute value of the difference between the second temperature B and the third temperature C, |BC|, is less than the preset temperature threshold D; it can also be: the absolute value of the difference between the second temperature C and the third temperature A, |AC|, is less than the preset temperature threshold D; or it can also be: the absolute value of the difference between the second temperature A and the third temperature B, |AB|, is less than the preset temperature threshold D.

[0133] In some embodiments, the temperature parameters of the cooling water pump motor winding and the cooling fan motor winding are detected by the temperature sensing component; the temperature parameters of the cooling water pump motor winding and the cooling fan motor winding are processed based on a preset temperature model to obtain a processing result; and a warning message is generated when the processing result indicates that the temperature parameters of the cooling water pump motor winding and the cooling fan motor winding are abnormal.

[0134] The preset temperature model can be determined according to actual conditions and is not limited here. As an example, a temperature trend prediction model for the cooling fan winding can be established based on historical data of stator winding temperature and coolant inlet and outlet temperatures. In this embodiment, pre-installing a temperature sensor in the cooling fan or water pump motor winding has the advantages of not only achieving phase loss location protection but also being used for motor health status detection and early warning functions.

[0135] It should be noted that after the traction control unit collects the temperature of the three-phase windings of the embedded cooling fan motor and cooling water pump motor from the temperature sensors, the absolute value is taken. The difference between any two temperatures is calculated. If the difference is greater than the protection threshold set by the protection, it can be determined that there is a three-phase imbalance in the cooling fan motor and cooling water pump motor. Further, assuming that the temperatures of the U, V, and W phase windings of the cooling fan motor and cooling water pump motor during operation are A, B, and C respectively, and the protection threshold for the difference between any two is D: If |AB|>D and |BC|<D and |AC|>D, then it can be specifically determined that the U phase of the cooling fan motor or cooling water pump motor is missing; similarly, if |AB|>D and |BC|>D and |AC|<D, then it can be specifically determined that the V phase of the cooling fan motor or cooling water pump motor is missing; similarly, if |AB|<D and |BC|>D and |AC|>D, then it can be specifically determined that the W phase of the cooling fan motor or cooling water pump motor is missing.

[0136] In this embodiment, a temperature sensor is pre-embedded in the response load motor windings (i.e., the three-phase windings of the cooling fan motor and the cooling water pump motor). Its short thermal response time, combined with the phase loss detection method described in this embodiment, allows for rapid and accurate location of motor phase loss. Phase loss protection is achieved by controlling the contactor to disconnect or the circuit breaker to disconnect, thus solving the matching problem of thermal relays in related technical solutions. Furthermore, by avoiding the use of thermal relays, this embodiment also reduces the number of switching components.

[0137] In an optional embodiment of the present invention, the control component further includes a first relay; the step of acquiring second state information of the control component in the cooling system and determining whether the control component is faulty based on the second state information includes:

[0138] Obtain the state information generated by the first relay when the state of the second contact of the first relay changes;

[0139] Based on the status information generated by the first relay, it is determined that the first relay is faulty.

[0140] In this embodiment, the second contact can be determined according to the actual situation and is not limited here. As an example, the second contact can be the first normally open contact of the first relay, that is, the state of the second contact is normally open. The step of obtaining the state information generated by the first relay when the state of the second contact of the first relay changes can be to obtain the state information generated by the first relay when the normally open state of the second contact changes to the normally closed state.

[0141] The status information generated by the first relay can be determined according to the actual situation, and is not limited here. As an example, the status information generated by the first relay can be normally closed status information. Determining that the first relay is faulty based on the status information generated by the first relay can be done by determining that the first relay is faulty based on the normally closed status information generated by the first relay.

[0142] The control component includes at least a first relay KMR1 and a second relay KMR2. For example... Figure 3 As shown, the control component 302 includes at least a relay assembly 400, which includes a first relay 4001 and a second relay 4002. All of the above components are fixed by being snapped onto the guide rail of the mounting plate 1000.

[0143] In an optional embodiment of the present invention, the control component further includes a first contactor; the step of acquiring second state information of the control component in the cooling system and determining whether the control component is faulty based on the second state information includes:

[0144] Obtain the state information generated by the first contactor when the state of the third contact of the first contactor changes;

[0145] Based on the status information generated by the first contactor, it is determined that the first contactor is faulty.

[0146] In this embodiment, the third contact can be determined according to actual conditions and is not limited here. As an example, the third contact can be a normally open contact, that is, the state of the third contact is normally open. The step of obtaining the state information generated by the first contactor when the state of the third contact of the first contactor changes can be to obtain the state information generated by the first contactor when the normally open state of the third contact changes to the normally closed state.

[0147] The status information generated by the first contactor can be determined according to the actual situation, and is not limited here. As an example, the status information generated by the first contactor can be normally closed status information. Determining that the first contactor is faulty based on the status information generated by the first contactor can be done by determining that the first contactor is faulty based on the normally closed status information generated by the first contactor.

[0148] In some embodiments, the state of the contact can be determined by the traction control unit. One end of the contact is connected to DC power, and the other end is connected to the digital input interface in the traction control unit. Taking the normally open contact of the contactor as an example, after the contactor is closed, the normally open contact of the contactor is also closed. Then the control unit receives a high-level DC power, and it can be determined that the contactor has been closed based on the high level.

[0149] The control components include at least a first contactor KM1, a second contactor KM2, a third contactor KM3, and a fourth contactor KM4. For example... Figure 3 As shown, the control unit 302 includes at least a first contactor 500, a second contactor 600, a third contactor 700, and a fourth contactor 800. It should be noted that a mechanical interlock accessory connects the first contactor 500 and the second contactor 600. When the first contactor 500 is in the ON state, the second contactor 600 is in the OFF state; when the first contactor 500 is in the OFF state, the second contactor 600 is in the ON state.

[0150] In some embodiments, the cooling system includes: a medium-voltage power supply line, a low-voltage control line, and an analog signal line. The medium-voltage power supply line uses a 3AC 380V, 50Hz AC power supply. The low-voltage control line uses a DC power supply; the specific type of the DC power supply is not specified here. It should be noted that the low-voltage control line is a digital feedback signal transmission line. The analog signal line includes: a connection between a temperature sensor embedded in the three-phase windings of the cooling fan motor and the traction control unit, and a connection between a temperature sensor embedded in the three-phase windings of the cooling water pump motor and the traction control unit.

[0151] In some embodiments, the cooling component further includes a first cooling assembly and a second cooling assembly; wherein the first cooling assembly may be a cooling fan; and the second cooling assembly may be a cooling water pump.

[0152] In some embodiments, the input terminals of the first circuit breaker, the second circuit breaker, and the third circuit breaker are connected in parallel; the output terminal of the first circuit breaker is connected to the input terminal of the first contactor, the output terminal of the second circuit breaker is connected to the input terminal of the third contactor, and the output terminal of the third circuit breaker is connected to the input terminal of the fourth contactor; the input terminal of the second contactor is short-circuited, and the output terminal of the second contactor is connected in parallel with the output terminal of the first contactor and then connected to the first cooling assembly; the output terminal of the third contactor is connected to the first cooling assembly; and the output terminal of the fourth contactor is connected to the second cooling assembly.

[0153] Figure 4 This is a schematic diagram of the control principle of a train cooling system including a converter, as described in an embodiment of the fault diagnosis method of the present invention. Figure 4 As shown, the input terminals of the first circuit breaker 2, the second circuit breaker 5, and the third circuit breaker 8 are connected in parallel to the medium-voltage input terminal; the output terminal of the first circuit breaker 2 is connected to the input terminal of the first contactor 10, the output terminal of the second circuit breaker 5 is connected to the input terminal of the third contactor 12, and the output terminal of the third circuit breaker 8 is connected to the input terminal of the fourth contactor 13; the input terminal of the second contactor 11 is short-circuited, and the output terminal of the second contactor 11 is connected in parallel with the output terminal of the first contactor 10 and then connected to the stator winding of the cooling fan (FAN) motor; the output terminal of the third contactor 12 is connected to the stator winding of the cooling fan motor; and the output terminal of the fourth contactor 13 is connected to the stator winding of the cooling water pump (PUMP) motor.

[0154] By short-circuiting the input terminal of the second contactor 11, the number of poles of the cooling fan motor winding is changed under the coordination of the relevant actions of the contactor assembly in this embodiment. That is, the combination of the first contactor 10 being in the on state and the third contactor 12 being in the off state enables the cooling fan motor to operate at low speed, wherein the second contactor 11 is in the off state under the action of the mechanical interlock accessory; the combination of the first contactor 10 being in the off state and the third contactor 12 being in the on state enables the cooling fan motor to operate at high speed, wherein the second contactor 11 is in the on state under the action of the mechanical interlock accessory.

[0155] In some embodiments, the control component further includes a first shutdown component, a second shutdown component, and a third shutdown component; the first relay is connected to the first contactor to form a first branch; the second contactor, the third contactor, and the second relay are connected to form a second branch; the first auxiliary contact, the first shutdown component, and the first relay form a third branch; the second auxiliary contact, the second shutdown component, and the second relay are connected to form a fourth branch; the third auxiliary contact, the third shutdown component, and the fourth contactor are connected to form a fifth branch; the first branch and the third branch are connected to the first cooling component; the second branch and the fourth branch are connected to the first cooling component; and the fifth branch is connected to the second cooling component.

[0156] Figure 5 This is another schematic diagram of the control principle of the cooling system of a train including a converter, as described in the fault diagnosis method of this invention. Figure 5As shown, the second normally open contact of the first relay KMR1 and the coil of the first contactor KM1 are connected in series to form a first series branch; the main contact of the second contactor KM2 and the coil of the third contactor KM3 are connected in series and then connected in parallel with the coil of the second contactor KM2. The circuit formed is then connected in series with the second normally open contact of the second relay KMR2 to finally form a second series branch; wherein, the main contact, or main contact, is mainly used to connect the power supply circuit and to distinguish the auxiliary contacts or auxiliary contacts integrated on the relay or contactor; the normally open contact of the first auxiliary contact AS1, the first shut-off component KMR1-cmd, and the coil of the first relay KMR1 are connected in series to form a third series branch; the normally open contact of the second auxiliary contact AS2, the second shut-off component KMR2-cmd, and the coil of the second relay KMR2 are connected in series to form a fourth series branch; the third auxiliary The normally open contact of contact AS3, the third shut-off component KM4-cmd, and the coil of the fourth contactor KM4 are connected in series to form the fifth series branch; the two ends of the first to fifth series branches are respectively connected to the positive voltage area terminal block and the negative voltage area terminal block; it can be understood that the first series branch and the third series branch together serve as the low-speed control circuit for the cooling fan motor, and the cooling fan motor can only be controlled to rotate at low speed when all switches in the first series branch and the third series branch are in the conducting state; the second series branch and the fourth series branch together serve as the high-speed control circuit for the cooling fan motor, and the cooling fan motor can only be controlled to rotate at high speed when all switches in the second series branch and the fourth series branch are in the conducting state; the fifth series branch serves as the control circuit for the cooling water pump motor, and the cooling water pump motor can only be controlled to rotate when all switches in the fifth series branch are in the conducting state.

[0157] In this embodiment, when the cooling fan needs to operate at high speed, the traction control unit (TCU) controls the first contactor KM1 to be in the off state, and the second contactor KM2 is in the on state under the mechanical interlocking action of the first contactor KM1. The second shut-off component KMR2-cmd controls the third contactor KM3 to be in the on state, thereby completing the low-speed to high-speed conversion of the cooling fan. The purpose of this setting is to reliably ensure the switching between high and low speeds and avoid the high and low speed windings of the cooling fan being energized at the same time, which would cause the motor to burn out.

[0158] In some embodiments, the traction control unit further includes a second switching assembly. The second switching assembly can be a relay in the traction converter, with output 0 indicating an open state and output 1 indicating a closed state. Specifically, the L+ terminals of the first control component YK1, the second control component YK2, and the third control component YK3 are connected in parallel to a terminal block in the positive voltage region, and their N- terminals are connected in parallel to a terminal block in the negative voltage region, thereby obtaining the power supply required for operation; the OFF terminals of the first control component YK1 and the second control component YK2 are connected in parallel to one end of the off terminal YK-OFF-cmd1 in the first switching assembly of the traction control unit; the ON terminals of the first control component YK1 and the second control component YK2 are connected in parallel to one end of the on terminal YK-ON-cmd1 in the first switching assembly of the traction control unit; the OFF terminal of the third control component YK3 is connected to the traction control unit... One end of the off terminal YK-OFF-cmd2 in the second switch assembly of the traction control unit is connected; the ON terminal of the third control assembly YK3 is connected to one end of the on terminal YK-ON-cmd2 in the second switch assembly of the traction control unit; the other ends of the off terminal YK-OFF-cmd1, the on terminal YK-ON-cmd1, the off terminal YK-OFF-cmd2, and the on terminal YK-ON-cmd2 in the first switch assembly of the traction control unit are all connected to the positive voltage terminal block; it can be understood that through such a control circuit, the first circuit breaker QF1 and the second circuit breaker QF2 can be remotely turned off or on simultaneously. Because the circuit breakers in the relevant technical solutions do not have an online reset function, they need to be manually closed one by one under normal circumstances; while the control circuit involved in this embodiment allows two remote controllers adapted to different circuit breakers to share a single command to make them synchronously in a closed or open state.

[0159] The first normally open contact of the first relay KMR1, the first normally open contact of the second relay KMR2, the normally open contact of the first contactor KM1, the normally open contact of the third contactor KM3, the normally open contact of the fourth contactor KM4, and the normally closed contact of the third auxiliary contact AS3 are connected in parallel to the positive voltage terminal block, and the other end is independently connected to the traction control unit for status feedback of related components. It should be noted that since the first auxiliary contact AS1 and the second auxiliary contact AS2 belong to the cooling fan motor control circuit, their normally closed contacts are connected in parallel to the traction control unit. If any of their normally closed contacts has an abnormal feedback, the first switch assembly will be operated to control the first circuit breaker and the second circuit breaker to be in the off or open state.

[0160] In an optional embodiment of the present invention, the method further includes:

[0161] If the first status information indicates that the first control command is abnormal, the first operating parameters related to the train are reacquired, and the first status information of the first control command in the cooling system is determined based on the first operating parameters.

[0162] Determine the first number corresponding to the reacquisition of the first operating parameters related to the train;

[0163] If the first number of times exceeds a first preset threshold, a first fault message is generated to indicate that the first control command is abnormal.

[0164] In this embodiment, the first status information indicating that the first control command is abnormal can be defined as follows: if the first status information indicates that the first control command is used to control the control component in the cooling system to be in a shut-off state, then the first control command is determined to be abnormal.

[0165] The process of reacquiring the first operating parameters related to the train and determining the first state information of the first control command in the cooling system based on the first operating parameters can be referred to the description in step 101 of the foregoing embodiment, and will not be repeated here.

[0166] The determination of the first number corresponding to the reacquisition of the first operating parameters related to the train can be as follows: when the first operating parameters related to the train are reacquisitioned, a first quantity parameter of the reacquisition of the first operating parameters related to the train is recorded; the first number of times is determined based on the first quantity parameter.

[0167] The first preset threshold can be determined according to the actual situation and is not limited here. As an example, the first preset threshold can be 3 times. When the first number of times is greater than the first preset threshold, generating the first fault information indicating that the first control command is abnormal can be done when the first number of times is greater than 3 times.

[0168] In some embodiments, the cooling system is controlled to stop working based on the first fault information; the first fault information is stored; and the first fault information is sent to a user terminal; wherein the first fault information is used to instruct the user to troubleshoot the cooling system.

[0169] In an optional embodiment of the present invention, the method further includes:

[0170] If the second state information indicates that the control component is faulty, the second state information of the control component in the cooling system is reacquired, and the fault of the control component is determined based on the second state information.

[0171] Determine the second number corresponding to the reacquisition of the second state information of the control component in the cooling system;

[0172] If the second number of occurrences exceeds a second preset threshold, second fault information is generated to indicate that the control component has a fault.

[0173] In this embodiment, the process of re-acquiring the second state information of the control component in the cooling system and determining whether the control component is faulty based on the second state information can refer to the description in step 102 of the previous embodiment, and will not be repeated here.

[0174] The determination of the second number corresponding to the reacquisition of the second state information of the control component in the cooling system can be as follows: when reacquiring the second state information of the control component in the cooling system, a second quantity parameter for reacquiring the second state information of the control component in the cooling system is recorded; the second number of times is determined based on the second quantity parameter.

[0175] In some embodiments, if the second status information indicates a fault in the control component, the first control command in the cooling system is regenerated.

[0176] The second preset threshold can be determined according to the actual situation and is not limited here. As an example, the first preset threshold can be 1 time. The step of generating second fault information indicating a fault in the control component when the second number of occurrences is greater than the second preset threshold can be that second fault information indicating a fault in the control component is generated when the second number of occurrences is greater than 1 time.

[0177] In some embodiments, the second fault information is stored; the second fault information is sent to a user terminal; wherein the second fault information is used to instruct the user to troubleshoot the cooling system.

[0178] In an optional embodiment of the present invention, the method further includes:

[0179] If the third state information indicates that the cooling component is faulty, the operating parameters of the cooling system are reacquired, the third state information of the cooling component in the cooling system is determined based on the operating parameters, and the fault of the cooling component is determined based on the third state information.

[0180] Determine the third number corresponding to the reacquisition of the operating parameters of the cooling system;

[0181] If the third number is greater than a third preset threshold, a third fault information is generated to indicate that the cooling component has a fault.

[0182] In this embodiment, the process of re-acquiring the operating parameters of the cooling system, determining the third state information of the cooling components in the cooling system based on the operating parameters, and determining whether the cooling components are faulty based on the third state information can refer to the description in step 103 of the previous embodiment, and will not be repeated here.

[0183] The process of determining the third number corresponding to the reacquisition of the operating parameters of the cooling system can be as follows: when the operating parameters of the cooling system are reacquisitioned, a third quantity parameter of the reacquisition of the operating parameters of the cooling system is recorded; and the third number is determined based on the third quantity parameter.

[0184] The third preset threshold can be determined according to the actual situation and is not limited here. As an example, the first preset threshold can be 1 time. When the third number is greater than the third preset threshold, the third fault information indicating that the cooling component has a fault can be generated when the third number is greater than 1 time.

[0185] In some embodiments, the third fault information is stored; the third fault information is sent to the user terminal; wherein the third fault information is used to instruct the user to troubleshoot the cooling system.

[0186] This embodiment proposes a fully controllable cooling system control device and manufacturing method that can be integrated into the converter, saving vehicle wiring costs caused by separating the cooling system and its control. Through the simplified and optimized design of related power supply circuits and control circuits, the control components are highly integrated into the traction converter. This embodiment also proposes a fully controllable cooling system and systematically presents its online fault self-diagnosis method, which facilitates fault location and can significantly improve maintenance efficiency. This embodiment also uses a method of embedding temperature sensors in the cooling fan motor and cooling water pump motor to replace traditional thermal relays, simplifying the cooling system control components. Based on the temperature signal and combined with control software, phase loss location identification is achieved. In addition, the real-time temperature can be combined with a temperature prediction model to realize the health status detection and early warning of the cooling fan motor and cooling water pump motor, thus comprehensively improving the intelligence level of the cooling system.

[0187] Figure 6 This is a flowchart illustrating a hybrid diagnostic method for the cooling system of a train, including a converter, according to an embodiment of the present invention. Figure 6As shown, the fault self-diagnosis method is based on the aforementioned cooling system and is implemented through the following steps to diagnose related faults when cooling components in the cooling system are not working:

[0188] Step S101: The traction control unit reads relevant operating parameters and determines control commands based on these parameters. The control commands are issued by the traction control unit, and their states include 0 and 1, where 0 represents an invalid command and 1 represents a valid command. When the command state indicates an invalid command, the control unit is in a turned-off state; when the command state indicates a valid command, the control unit is in a turned-on state. The relevant operating parameters include at least: the real-time vehicle speed obtained from the vehicle network system, and the operating states of the cooling fan motor and / or the cooling water pump motor determined based on this speed; the traction inverter status, auxiliary converter output voltage, temperature parameters of the cooling fan motor windings (i.e., cooling fan winding temperature), temperature parameters of the cooling water pump motor windings (i.e., cooling water pump winding temperature), temperature and pressure parameters of the cooling pipe inlet (i.e., coolant inlet temperature and pressure), and temperature and pressure parameters of the cooling pipe outlet (i.e., coolant outlet temperature and pressure) directly acquired by the traction control unit.

[0189] The control commands include: control commands for controlling the first relay KMR1 (i.e., low-speed operation command for the cooling fan motor), control commands for controlling the first relay KMR2 (i.e., high-speed operation command for the cooling fan motor), control commands for controlling the fourth contactor KM4 (i.e., operation command for the cooling water pump motor), commands for controlling the first control component to turn on, commands for controlling the second control component to turn on, commands for controlling the first control component to turn off, and commands for controlling the second control component to turn off.

[0190] Step S102: Determine whether the control command status is normal based on the relevant operating parameters read by the traction control unit. If the relevant control command is abnormal, repeat steps S101 and S102 at least 3 times until the control command status is normal. Otherwise, the traction control unit records that the relevant control command is faulty and isolates the cooling system.

[0191] Step S201: After steps S101 and S102 are completed and the control command is confirmed to be normal, continue to monitor the status of the control components in the cooling system, specifically including the following steps:

[0192] Step S202: Based on the normally closed contact of the third auxiliary contact AS3, the normally closed contact of the first auxiliary contact AS1, and the normally closed contact of the second auxiliary contact AS2 detected by the traction control unit, comprehensively determine whether the circuit breaker is in normal condition (i.e., whether the circuit breaker is in the conducting state).

[0193] Step S205: If the states of the first circuit breaker QF1, the second circuit breaker QF2, and the third circuit breaker QF3 as determined in step S202 are all abnormal, the traction control unit is allowed to resend the command to control the first control component and the command to control the second control component to the control component in the cooling system; and return to execute S202 again. If the circuit breaker states are still determined to be abnormal, the traction control unit internally records that there is a fault in the circuit breaker and the control component.

[0194] Step S203: Based on the status of the first normally open contact of the first relay KMR1 and the first normally open contact of the second relay KMR2 detected by the traction control unit, determine whether the status of the relays is normal (i.e., whether the relays are in the conducting state).

[0195] Step S206: If the states of the first relay KMR1 and the second relay KMR2 are both abnormal as determined in step S203, and the circuit breaker is deemed to be in normal condition as determined in step S202, the traction control unit may resend the control commands for controlling the first relay KMR1 and the first relay KMR2 to the control components in the cooling system; and return to execute S203 again. If the relay states are still determined to be abnormal, the traction control unit internally records that the relays are faulty.

[0196] Step S204: Based on the normally open contact status of the first contactor KM1, the normally open contact of the third contactor KM3, and the normally open contact of the fourth contactor KM4 detected by the traction control unit, comprehensively determine whether the contactor status is normal (i.e., whether the contactor is in the conducting state).

[0197] Step S207: If the normally open contacts of the first contactor KM1, the third contactor KM3, and the fourth contactor KM4 are all abnormal as determined in step S204, the traction control unit may resend the control commands for controlling the first relay KMR1, the first relay KMR2, and the fourth contactor KM4 to the control components in the cooling system once again if the result determined in step S202 is that the circuit breaker is in normal condition and the result determined in step S203 is that the relay is in normal condition. If the result determined in step S202 is that the circuit breaker is in normal condition, the traction control unit shall resend the control commands for controlling the first relay KMR1, the first relay KMR2, and the fourth contactor KM4 to the control components in the cooling system. Then, it shall return to execute S204 again. If the contactor is still determined to be abnormal, the traction control unit shall record that the contactor is faulty.

[0198] Step S301: After steps S202, S203, and S204 are all deemed normal, the traction control unit reads the relevant parameters of the cooling system again to determine the status of the components in the cooling system. The cooling system operating parameters here include: the output voltage of the auxiliary converter, the temperature parameters of the cooling fan motor winding (i.e., the cooling fan winding temperature), the temperature parameters of the cooling water pump motor winding (i.e., the cooling water pump winding temperature), the temperature and pressure parameters of the cooling pipe inlet of the cooling water pump containing the coolant (i.e., the coolant inlet temperature and pressure), and the temperature and pressure parameters of the cooling pipe outlet of the cooling water pump containing the coolant (i.e., the coolant outlet temperature and pressure).

[0199] Step S302: Based on the temperature parameters of the cooling fan motor windings and the cooling water pump motor windings, it can be determined at least whether there is a phase loss in the cooling fan motor and the cooling water pump motor; based on the temperature and pressure parameters of the inlet of the cooling pipe containing coolant in the cooling water pump and the outlet of the cooling pipe containing coolant in the cooling water pump, it can be determined at least whether the temperature and pressure sensors are normal and whether the cooling fan and the cooling water pump are working normally; if the cooling components are determined to be in normal condition, the diagnosis is complete.

[0200] Step S303: If a fault is determined in the cooling system components such as the cooling fan, cooling water pump, temperature and pressure sensors, a status check of the cooling components in the cooling system is required. It should be noted that this status check is a physical appearance inspection and must be performed offline. At this point, the self-diagnosis of a cooling system fault is complete.

[0201] This invention provides a fault diagnosis device applied to the cooling system of a train including a converter. Figure 7 This is a schematic diagram of the composition structure of the fault diagnosis device according to an embodiment of the present invention, as shown below. Figure 7 As shown, the device 70 includes:

[0202] The first determining module 701 is used to acquire first operating parameters related to the train and determine first state information of the first control command in the cooling system based on the first operating parameters.

[0203] The second determining module 702 is used to obtain the second state information of the control component in the cooling system when the first state information indicates that the first control command is normal, and to determine whether the control component is faulty based on the second state information.

[0204] The third determining module 703 is used to obtain the operating parameters of the cooling system when the second state information indicates that the control component is not faulty, determine the third state information of the cooling component in the cooling system based on the operating parameters, and determine whether the cooling component is faulty based on the third state information.

[0205] In other embodiments, the control component includes a first circuit breaker and a first control assembly; the first circuit breaker is connected to the first control assembly; the device 70 further includes: a fourth determining module, a first control module, and a second control module; wherein,

[0206] The fourth determining module is used to acquire second operating parameters related to the train and determine a second control command of the first control component based on the second operating parameters;

[0207] The first control module is used to control the first circuit breaker to be in the conducting state based on the second control command when the second operating parameters meet the first preset conditions;

[0208] The second control module is used to control the first circuit breaker to be in the off state based on the second control command when the second operating parameters do not meet the first preset conditions.

[0209] In other embodiments, the cooling system includes a first switching assembly; the first switching assembly is connected to the first control assembly; the fourth determining module is further configured to acquire third state information of the first switching assembly; and determine a second control command of the first control assembly based on the third state information and the second operating parameters.

[0210] In other embodiments, the control component further includes a first contact connected to the first control component; the second determining module 702 is further configured to acquire state information generated by the first contact when the state of the first contact changes; and determine that the first circuit breaker and the first control component are faulty based on the state information generated by the first contact.

[0211] In other embodiments, the cooling component includes a first phase winding, a second phase winding, a third phase winding, and a temperature sensing component; the temperature sensing component is disposed on the first phase winding, the second phase winding, and the third phase winding; the device 70 further includes: a data acquisition module, a fifth determination module, and a sixth determination module; wherein,

[0212] The acquisition module is used to acquire the first temperature corresponding to the first phase winding, the second temperature corresponding to the second phase winding, and the third temperature corresponding to the third phase winding through the temperature sensing component;

[0213] The fifth determining module is used to determine the absolute value of the difference between the first temperature and the second temperature, and the absolute value of the difference between the first temperature and the third temperature.

[0214] The sixth determining module is used to determine that there is a fault in the first phase winding when the absolute value of the difference between the first temperature and the second temperature and the absolute value of the difference between the first temperature and the third temperature are both greater than a preset temperature threshold.

[0215] In other embodiments, the control component further includes a first relay; the second determining module 702 is further configured to acquire state information generated by the first relay when the state of the second contact of the first relay changes; and determine that the first relay is faulty based on the state information generated by the first relay.

[0216] In other embodiments, the control component further includes a first contactor; the second determining module 702 is further configured to acquire state information generated by the first contactor when the state of the third contact of the first contactor changes; and determine that the first contactor is faulty based on the state information generated by the first contactor.

[0217] In other embodiments, the first determining module 701 is further configured to: reacquire first operating parameters related to the train when the first state information indicates that the first control command is abnormal; determine the first state information of the first control command in the cooling system based on the first operating parameters; determine the first number of times the first operating parameters related to the train are reacquired; and generate first fault information indicating that the first control command is abnormal when the first number of times is greater than a first preset threshold.

[0218] In other embodiments, the second determining module 702 is further configured to: reacquire the second state information of the control component in the cooling system when the second state information indicates that the control component has a fault; determine whether the control component has a fault based on the second state information; determine the second number corresponding to reacquiring the second state information of the control component in the cooling system; and generate second fault information indicating that the control component has a fault when the second number is greater than a second preset threshold.

[0219] In other embodiments, the third determining module 703 is further configured to: reacquire the operating parameters of the cooling system when the third state information indicates that the cooling component has a fault; determine the third state information of the cooling component in the cooling system based on the operating parameters; determine whether the cooling component has a fault based on the third state information; determine the third number corresponding to the reacquisition of the operating parameters of the cooling system; and generate third fault information indicating that the cooling component has a fault when the third number is greater than a third preset threshold.

[0220] The description of the above device embodiments is similar to that of the above method embodiments, and has similar beneficial effects. For technical details not disclosed in the device embodiments of the present invention, please refer to the description of the method embodiments of the present invention for understanding.

[0221] It should be noted that, in the embodiments of the present invention, if the above-described fault diagnosis method is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical embodiments of the present invention, 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 fault diagnosis device (which may be a personal computer, server, or network device, etc.) to execute all or part of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), magnetic disks, or optical disks. Thus, the embodiments of the present invention are not limited to any specific hardware and software combination.

[0222] Correspondingly, embodiments of the present invention provide a fault diagnosis device, including a memory and a processor. The memory stores a computer program that can run on the processor. When the processor executes the program, it implements the method described in any of the above-mentioned embodiments.

[0223] Correspondingly, embodiments of the present invention provide a storage medium storing executable instructions, which, when executed by a processor, implement the method described in any of the above-mentioned embodiments.

[0224] It should be noted that the descriptions of the storage medium and device embodiments above are similar to those of the method embodiments above, and have similar beneficial effects. For technical details not disclosed in the storage medium and device embodiments of the present invention, please refer to the descriptions of the method embodiments of the present invention for understanding.

[0225] It should be noted that, Figure 8This is a schematic diagram of a hardware entity structure of a fault diagnosis device according to an embodiment of the present invention, such as... Figure 8 As shown, the hardware entity of the fault diagnosis device 80 includes a processor 801 and a memory 803. Optionally, the fault diagnosis device 80 may also include a communication interface 802.

[0226] It is understood that memory 803 can be volatile memory or non-volatile memory, or both. Non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), ferromagnetic random access memory (FRAM), flash memory, magnetic surface memory, optical disc, or compact disc read-only memory (CD-ROM); magnetic surface memory can be disk storage or magnetic tape storage. Volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Synchronous Static Random Access Memory (SSRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), Enhanced Synchronous Dynamic Random Access Memory (ESDRAM), SyncLink Dynamic Random Access Memory (SLDRAM), and Direct Rambus Random Access Memory (DRRAM).The memory 803 described in the embodiments of the present invention is intended to include, but is not limited to, these and any other suitable types of memory.

[0227] The methods disclosed in the above embodiments of the present invention can be applied to or implemented by processor 801. Processor 801 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the integrated logic circuit of the hardware in processor 801 or by instructions in software form. The processor 801 may be a general-purpose processor, a digital signal processor (DSP), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Processor 801 can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. The general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the methods disclosed in the embodiments of the present invention can be directly manifested as being executed by a hardware decoding processor, or being executed by a combination of hardware and software modules in the decoding processor. The software modules may be located in a storage medium, which is located in memory 803. Processor 801 reads the information in memory 803 and completes the steps of the aforementioned method in conjunction with its hardware.

[0228] In an exemplary embodiment, the fault diagnosis device may be implemented by one or more application-specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), complex programmable logic devices (CPLDs), field-programmable gate arrays (FPGAs), general-purpose processors, controllers, microcontrollers (MCUs), microprocessors, or other electronic components to perform the aforementioned method.

[0229] In the several embodiments provided by this invention, it should be understood that the disclosed methods and apparatus can be implemented in other ways. The apparatus 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 may be combined, or integrated into another observation, or some features may be ignored or not executed. In addition, the communication connections between the various components shown or discussed may be through some interfaces, indirect coupling or communication connections between devices or units, and may be electrical, mechanical, or other forms.

[0230] 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, that is, 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.

[0231] 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.

[0232] Alternatively, if the integrated units described above in the embodiments of the present invention are implemented as software functional units and sold or used as independent products, they can also be stored in a computer-readable storage medium. Based on this understanding, the technical embodiments of the present invention, 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 fault diagnosis device (which may be a personal computer, server, or network device, etc.) to execute all or part of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as mobile storage devices, ROMs, magnetic disks, or optical disks.

[0233] The fault diagnosis method, apparatus, and computer storage medium described in this invention are only examples of the embodiments of this invention, but are not limited thereto. Any fault diagnosis method, apparatus, and computer storage medium involved are within the protection scope of this invention.

[0234] 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 the invention. 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 the invention, 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 the invention. The sequence numbers of the above-described embodiments of the invention are merely descriptive and do not represent the superiority or inferiority of the embodiments.

[0235] 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.

[0236] The above description is merely an embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A fault diagnosis method, characterized in that, A cooling system for a train including a converter, the method comprising: Obtain first operating parameters related to the train, and determine first state information of the first control command in the cooling system based on the first operating parameters; When the first status information indicates that the first control command is normal, the second status information of the control component in the cooling system is obtained, and the control component is judged to be faulty based on the second status information. If the second state information indicates that the control component is not faulty, the operating parameters of the cooling system are obtained, the third state information of the cooling component in the cooling system is determined based on the operating parameters, and the presence or absence of a fault in the cooling component is determined based on the third state information. The control component includes a first circuit breaker and a first control assembly; the first circuit breaker is connected to the first control assembly; the method further includes: Acquire second operating parameters related to the train, and determine a second control command for the first control component based on the second operating parameters; When the second operating parameter meets the first preset condition, the first circuit breaker is controlled to be in the conducting state based on the second control command; If the second operating parameter does not meet the first preset condition, the first circuit breaker is controlled to be in the off state based on the second control command.

2. The method according to claim 1, characterized in that, The cooling system includes a first switching assembly; the first switching assembly is connected to a first control assembly; the step of determining the second control command of the first control assembly based on the second operating parameters includes: Obtain the third state information of the first switch component; The second control command of the first control component is determined based on the third status information and the second operating parameters.

3. The method according to claim 1, characterized in that, The control component further includes a first contact, which is connected to the first control assembly; the step of acquiring second state information of the control component in the cooling system and determining whether the control component is faulty based on the second state information includes: Obtain the state information generated by the first contact when the state of the first contact point of the first contact changes; Based on the status information generated by the first contact, it is determined that the first circuit breaker and the first control component are faulty.

4. The method according to claim 1, characterized in that, The cooling component includes a first phase winding, a second phase winding, a third phase winding, and a temperature sensing component; the temperature sensing component is disposed on the first phase winding, the second phase winding, and the third phase winding; the method further includes: The temperature sensing component collects the first temperature corresponding to the first phase winding, the second temperature corresponding to the second phase winding, and the third temperature corresponding to the third phase winding. Determine the absolute value of the difference between the first temperature and the second temperature, and the absolute value of the difference between the first temperature and the third temperature; If the absolute value of the difference between the first temperature and the second temperature, and the absolute value of the difference between the first temperature and the third temperature are both greater than a preset temperature threshold, it is determined that the first phase winding has a fault.

5. The method according to claim 3, characterized in that, The control component further includes a first relay; the step of acquiring second state information of the control component in the cooling system and determining whether the control component is faulty based on the second state information includes: Obtain the state information generated by the first relay when the state of the second contact of the first relay changes; Based on the status information generated by the first relay, it is determined that the first relay is faulty.

6. The method according to claim 5, characterized in that, The control component further includes a first contactor; acquiring second state information of the control component in the cooling system, and determining whether the control component is faulty based on the second state information, includes: Obtain the state information generated by the first contactor when the state of the third contact of the first contactor changes; Based on the status information generated by the first contactor, it is determined that the first contactor is faulty.

7. The method according to claim 1, characterized in that, The method further includes: If the first status information indicates that the first control command is abnormal, the first operating parameters related to the train are reacquired, and the first status information of the first control command in the cooling system is determined based on the first operating parameters. Determine the first number corresponding to the reacquisition of the first operating parameters related to the train; If the first number of times exceeds a first preset threshold, a first fault message is generated to indicate that the first control command is abnormal.

8. The method according to claim 1, characterized in that, The method further includes: If the second state information indicates that the control component is faulty, the second state information of the control component in the cooling system is reacquired, and the fault of the control component is determined based on the second state information. Determine the second number corresponding to the reacquisition of the second state information of the control component in the cooling system; If the second number of occurrences exceeds a second preset threshold, second fault information is generated to indicate that the control component has a fault.

9. The method according to claim 1, characterized in that, The method further includes: If the third state information indicates that the cooling component is faulty, the operating parameters of the cooling system are reacquired, the third state information of the cooling component in the cooling system is determined based on the operating parameters, and the fault of the cooling component is determined based on the third state information. Determine the third number corresponding to the reacquisition of the operating parameters of the cooling system; If the third number is greater than a third preset threshold, a third fault information is generated to indicate that the cooling component has a fault.

10. A fault diagnosis device, characterized in that, A cooling system for trains including converters, the device comprising: The first determining module is used to acquire first operating parameters related to the train and determine first state information of the first control command in the cooling system based on the first operating parameters. The second determining module is used to obtain the second state information of the control component in the cooling system when the first state information indicates that the first control command is normal, and to determine whether the control component is faulty based on the second state information. The third determining module is used to obtain the operating parameters of the cooling system when the second state information indicates that the control component is not faulty, determine the third state information of the cooling component in the cooling system based on the operating parameters, and determine whether the cooling component is faulty based on the third state information. The control component includes a first circuit breaker and a first control assembly; the first circuit breaker is connected to the first control assembly; the device further includes: a fourth determining module, a first control module, and a second control module; wherein... The fourth determining module is used to acquire second operating parameters related to the train and determine a second control command of the first control component based on the second operating parameters; The first control module is used to control the first circuit breaker to be in the conducting state based on the second control command when the second operating parameters meet the first preset conditions; The second control module is used to control the first circuit breaker to be in the off state based on the second control command when the second operating parameters do not meet the first preset conditions.

11. A fault diagnosis device, comprising a memory and a processor, wherein the memory stores a computer program executable on the processor, characterized in that, When the processor executes the program, it implements the method according to any one of claims 1 to 9.

12. A storage medium, characterized in that, The storage medium stores executable instructions that, when executed by a processor, implement the method described in any one of claims 1 to 9.

Images