Traction converter cooling system control method and device, and storage medium

Abstract

The invention provides a traction converter cooling system control method and device and a storage medium. Each carriage of a train is provided with a traction converter and a traction converter cooling system. The traction converter cooling system comprises a cooling water pump and a cooling fan; the traction converter cooling system adopts a water cooling mode, water circulation is achieved through a cooling water pump, and then water is cooled through a cooling fan. The traction converter cooling system communicates with the CCU through the IO module; the method comprises the steps that operation parameters are collected, wherein the operation parameters comprise the water-cooling inlet temperature, the water-cooling outlet temperature, the water-cooling box internal temperature, the traction converter internal temperature, the traction converter filter circuit temperature, the TCU case temperature, the cooling inlet pressure, the cooling outlet pressure and the liquid level; performing fault judgment based on the operation parameters; and controlling the traction converter cooling system based on the fault judgment result. According to the method provided by the invention, the traction converter cooling system can be controlled.

Description

Technical Field

[0001] The present application relates to the technical field of traction converter cooling system control, and in particular to a traction converter cooling system control method, device, and storage medium. Background Art

[0002] The traction inverter of a high-speed train is a key driving device for achieving train traction. The traction inverter is connected to the secondary winding of the high-voltage traction transformer, and receives energy through the pre-charging switch and the short-circuit contactor. The four-quadrant rectifier inside the traction inverter rectifies the AC power stepped down by the transformer into 3000V DC (volts), and then the traction inverter inside the traction inverter inverts the 3000V DC into the variable-voltage and variable-frequency AC power required by the traction motor. The traction inverter is a control device that drives the traction motor. The internal power module, filter circuit, chopper resistor, etc. generate a lot of heat, so a water cooling system is needed to cool the traction inverter box and provide high-temperature protection to ensure the normal operation of the inverter. The traction inverter controls the vehicle traction motor to achieve train traction, so the role of the traction inverter cooling system is extremely important. The control and fault handling of the traction inverter cooling system directly affect the traction performance and driving safety of the train.

[0003] The cooling system of the traction inverter can ensure the normal operation of the traction inverter, and will not cause equipment failure due to over-temperature, resulting in the loss of traction of the train or even affecting the safety of train driving. The cooling system of the traction inverter generally uses water cooling. Water flows in the circulation pipeline to take away the heat inside the inverter, and the circulating water is cooled by the cooling fan. The water in the pipeline is continuously circulated through the water pump.

[0004] The existing technology is that TCU (Traction Control Unit) and CCU (Central Control Unit) jointly control the cooling system of the traction converter. The temperature sensor and pressure sensor inside the traction converter collect the operation status of the corresponding cooling water cooling system and send a start request to the CCU. The CCU controls the operation of the cooling water pump and the cooling fan according to the start request. The TCU monitors the operating status of the cooling system through temperature monitoring, pressure monitoring, speed monitoring, etc. to ensure efficient cooling of the traction converter.

[0005] CCU is the train control unit, which communicates with all systems of the vehicle and completes the traction and braking control of the vehicle. CCU realizes the power supply scheduling function of the auxiliary systems on the train that require medium-voltage power supply, and is responsible for the power supply of medium-voltage equipment of the vehicle. CCU also controls the closing of the AC power supply relay of the cooling fan or water pump by judging the working condition of the converter and the status of the vehicle according to the control request of the cooling system sent by TCU.

[0006] As the control center of the train, CCU independently controls the cooling system of the traction converter, and a control method for the cooling system needs to be designed. Summary of the invention

[0007] In order to solve one of the above-mentioned technical defects, the present application provides a traction inverter cooling system control method, device, and storage medium.

[0008] In a first aspect of the present application, a traction converter cooling system control method is provided, characterized in that each carriage of the train is equipped with a traction converter and a traction converter cooling system; the traction converter cooling system includes a cooling water pump and a cooling fan; the traction converter cooling system adopts a water cooling method, and the water is circulated by the cooling water pump, and then the water is cooled by the cooling fan; the traction converter cooling system communicates with the central control unit CCU through an input and output IO module;

[0009] The method includes:

[0010] Collect operating parameters, including: water cooling inlet temperature, water cooling outlet temperature, water cooling box internal temperature, traction converter internal temperature, traction converter filter circuit temperature, traction control unit TCU chassis temperature, cooling inlet pressure, cooling outlet pressure and liquid level;

[0011] Fault diagnosis based on operating parameters;

[0012] The cooling system of the traction converter is controlled based on the fault judgment result.

[0013] In a second aspect of the present application, an electronic device is provided, comprising:

[0014] Memory;

[0015] Processor; and

[0016] Computer programs;

[0017] The computer program is stored in the memory and is configured to be executed by the processor to implement the method as described in the first aspect above.

[0018] According to a third aspect of the present application, a computer-readable storage medium is provided, on which a computer program is stored; the computer program is executed by a processor to implement the method described in the first aspect above.

[0019] The present application provides a control method, device and storage medium for a traction converter cooling system. Each carriage of a train is equipped with a traction converter and a traction converter cooling system. The traction converter cooling system includes a cooling water pump and a cooling fan. The traction converter cooling system adopts a water cooling method, and the water is circulated by the cooling water pump, and then the water is cooled by the cooling fan. The traction converter cooling system communicates with the CCU through an IO module. The method includes: collecting operating parameters, and the operating parameters include: water cooling inlet temperature, water cooling outlet temperature, internal temperature of the water cooling box, internal temperature of the traction converter, filter circuit temperature of the traction converter, chassis temperature of the TCU, cooling inlet pressure, cooling outlet pressure and liquid level; performing fault judgment based on the operating parameters; and controlling the traction converter cooling system based on the fault judgment result. The method provided in the present application can realize the control of the traction converter cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application in the drawings:

[0021] Figure 1 A schematic diagram of an implementation architecture of a traction converter cooling system control method provided in an embodiment of the present application;

[0022] Figure 2 A schematic diagram of a DC low-voltage control circuit and a cooling water pump medium-voltage power supply circuit provided in an embodiment of the present application;

[0023] Figure 3 A schematic diagram of a cooling fan AC control circuit provided in an embodiment of the present application;

[0024] Figure 4 A schematic flow chart of a traction converter cooling system control method provided in an embodiment of the present application;

[0025] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to make the technical solutions and advantages in the embodiments of the present application more clearly understood, the exemplary embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than an exhaustive list of all the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0027] In the process of implementing the present application, the inventors discovered that the CCU, as the control center of the train, independently completes the control of the traction inverter cooling system, and a control method for the cooling system needs to be designed.

[0028] In view of the above problems, the embodiment of the present application provides a traction converter cooling system control method, device, and storage medium. Each carriage of the train is equipped with a traction converter and a traction converter cooling system. The traction converter cooling system includes a cooling water pump and a cooling fan. The traction converter cooling system adopts a water cooling method, and the water is circulated by the cooling water pump, and then the water is cooled by the cooling fan. The traction converter cooling system communicates with the CCU through the IO module. The method includes: collecting operating parameters, the operating parameters include: water cooling inlet temperature, water cooling outlet temperature, internal temperature of the water cooling box, internal temperature of the traction converter, filter circuit temperature of the traction converter, chassis temperature of the TCU, cooling inlet pressure, cooling outlet pressure, and liquid level; fault judgment based on the operating parameters; and control of the traction converter cooling system based on the fault judgment result. The method provided in the present application can realize the control of the traction converter cooling system.

[0029] In a train that implements the control method for the traction converter cooling system provided in this embodiment, each carriage is equipped with a traction converter and a traction converter cooling system. The traction converter cooling system includes a cooling water pump and a cooling fan. The traction converter cooling system adopts a water cooling method, and the water is circulated by the cooling water pump, and then the water is cooled by the cooling fan. The traction converter cooling system communicates with the CCU through the IO (input and output) module.

[0030] Each EMU of the train is equipped with a traction converter and a corresponding cooling system. The cooling system uses water cooling, which circulates water through a cooling pump and cools the water through a cooling fan. The water level and pressure are monitored in real time to see if they are normal.

[0031] For example, the implementation architecture of the traction converter cooling system control method provided in this embodiment is as follows: Figure 1 As shown, the CCU collects control-related data through the IO module, receives information on contactors, circuit breakers, corresponding temperature sensors, pressure sensors, and flow monitoring on the cooling system control circuit, and sends control instructions through the IO module, which act on the control circuit.

[0032] In addition, for the start and stop control circuits of the cooling water pump, internal fan and cooling fan, a circuit control method is designed to control the start and stop of the cooling water pump, the start and stop of the internal fan, and the high-speed or low-speed operation of the cooling fan. At the same time, the fault of the cooling equipment is diagnosed according to the feedback from the contactor or circuit breaker to protect the train traction equipment.

[0033] DC low voltage control circuit and cooling water pump medium voltage power supply circuit such as Figure 2 As shown in the figure, it is the control circuit of the cooling water pump, internal fan and cooling fan of the traction converter cooling system. The contactor of the cooling equipment is closed through the IO module, and then the corresponding normally open contact of the contactor is closed, and the cooling equipment starts normally. The control circuits of high-speed control and low-speed control are interlocked. Once the cooling fan runs at high speed, the low-speed contactor cannot be closed. Once the cooling fan runs at low speed, the high-speed contactor cannot be closed. When the cooling fan needs to run at high speed, the CCU controls the DO (Data Output, digital output) output to energize contactors Q71 and Q73, and the normally open contacts are closed, so the high-speed power supply line is energized, and at the same time the normally closed contact of Q71 is disconnected, and the low-speed power supply line is disconnected; when the cooling fan needs to run at low speed, the CCU controls the DO output to energize contactor Q72, so that the low-speed power supply line is energized, the high-speed power supply line is disconnected, and the motor runs at low speed. In this way, the high-speed and low-speed interlocking functions can be realized.

[0034] Figure 3 A cooling fan AC control circuit is shown, which includes a cooling water pump, a cooling fan, and an internal fan. The cooling water pump and the internal fan realize operation control according to the control of the corresponding contactors. The cooling fan control is divided into high-speed operation and low-speed operation.

[0035] Each train car is equipped with a traction converter and a traction converter cooling system. The traction converter cooling system includes a cooling water pump and a cooling fan. The traction converter cooling system uses water cooling, which circulates water through a cooling water pump and cools the water through a cooling fan. The traction converter cooling system communicates with the CCU through the IO module, and Figure 1 , Figure 2 and Figure 3 The architecture and circuit shown in Figure 4 The implementation process of the traction converter cooling system control method provided in this embodiment is as follows:

[0036] 401, collect operating parameters.

[0037] Among them, the operating parameters include: water cooling inlet temperature, water cooling outlet temperature, internal temperature of the water cooling box, internal temperature of the traction inverter, filter circuit temperature of the traction inverter, chassis temperature of the TCU, cooling inlet pressure, cooling outlet pressure and liquid level.

[0038] In addition, the operating parameters may also include other parameters, such as the motor stator temperature and the like.

[0039] In step 401, data from 6 temperature sensors and data from 2 pressure sensors are collected. The following describes the collection process of each operating parameter.

[0040] 1. The process of collecting water cooling inlet temperature

[0041] The inlet temperature collected in this embodiment is the inlet temperature of the traction converter box, not the inlet temperature of the water cooling system. The collection of the water cooling inlet temperature can be achieved through steps 201 to 203.

[0042] 201, obtaining the operating status of the cold water inlet temperature sensor.

[0043] The operating status is faulty or normal, and the initial value of the operating status of the cold water inlet temperature sensor is normal.

[0044] 202, if the operating state of the cold water inlet temperature sensor is faulty, determine the water cooling inlet temperature

[0045] The temperature of the cooling system of the traction converter

[0046] 203, if the operating status of the cold water inlet temperature sensor is normal, execute the following steps 203-1 to 203-4:

[0047] 203-1, obtain the inlet temperature of the traction converter box collected by the cold water inlet temperature sensor

[0048] 203-2, if but And when the water cooling inlet temperature timer T-in If it is already on, turn off the Timer T-in .

[0049] in, is the preset minimum inlet temperature threshold, is the preset maximum inlet temperature threshold. For example,

[0050] 203-3, if but:

[0051] When the Timer T-in If it is not turned on, turn on the Timer T-in ,

[0052] When the Timer T-in Enabled, but Timer T-in When the continuous opening time is less than the preset first time 1,

[0053] When the Timer T-in Enabled, but Timer T-in When the continuous opening time is not less than time1, confirm Turn off the Timer T-in , the operating status of the cold water inlet temperature sensor is updated to fault, and the operating status of the cold water inlet temperature sensor is updated to normal after the preset second time period time2.

[0054] For example, time1 = 0.6s, time2 = 90s.

[0055] 203-4, if but:

[0056] When the Timer T-in If it is not turned on, turn on the Timer T-in ,

[0057] When the Timer T-in Enabled, but Timer T-in When the continuous opening time is less than time1,

[0058] When the Timer T-in Enabled, but Timer T-in When the continuous opening time is not less than time1, confirm Turn off the Timer T-in , update the operating status of the cold water inlet temperature sensor to fault, and update the operating status of the cold water inlet temperature sensor to normal after time2.

[0059] That is to say, when collecting the cold water inlet temperature,

[0060] When the temperature value collected by the cold water inlet temperature sensor In normal range If the temperature is within [-35℃,120.5℃], the temperature value is output. As the cold water inlet temperature (Right now ).

[0061] When the collected temperature value Higher than (such as 120.5℃), the output is 120.5℃ (i.e. ).

[0062] When the collected temperature value Lower than (such as -35℃), then the output is -35℃ (i.e. ).

[0063] When the collected temperature value Higher than (such as 120.5℃) or lower When the temperature remains above -35℃ (such as -35℃) for time1 (such as 0.6s), the operating status of the cold water inlet temperature sensor is considered to be faulty; after the temperature returns to the normal range, it is delayed for time2 (such as 90s), and then the operating status of the cold water inlet temperature sensor is updated to normal.

[0064] When the operating state of the cold water inlet temperature sensor is faulty, the temperature of the traction converter cooling system is used. As the cold water inlet temperature (Right now ).

[0065] 2. The process of collecting water cooling outlet temperature

[0066] The water cooling outlet temperature can be collected through steps 211 to 213.

[0067] 211, obtaining the operating status of the water cooling outlet temperature sensor.

[0068] The operating state is faulty or normal, and the initial value of the operating state of the water-cooling outlet temperature sensor is normal.

[0069] 212, if the operating state of the water cooling outlet temperature sensor is faulty, determine the water cooling outlet temperature The default value for the water cooling outlet temperature

[0070] like

[0071] 213, if the operating status of the water cooling outlet temperature sensor is normal, execute the following steps 213-1 to 213-4:

[0072] 213-1, obtain the outlet temperature of the traction converter box collected by the water cooling outlet temperature sensor

[0073] 213-2, if but And when the water cooling outlet temperature timer Timer T-out If it is already on, turn off the Timer T-out .

[0074] in, is the preset minimum threshold of outlet temperature, is the preset maximum threshold of outlet temperature. For example,

[0075] 213-3, if but:

[0076] When the Timer T-oit If it is not turned on, turn on the Timer T-out ,

[0077] When the Timer T-out Enabled, but Timer T-out When the continuous opening time is less than the preset third time 3,

[0078] When the Timer T-out Enabled, but Timer T-out When the continuous opening time is not less than time3, confirm Turn off the Timer T-out , the operating status of the water-cooling outlet temperature sensor is updated to fault, and the operating status of the water-cooling outlet temperature sensor is updated to normal after the preset fourth time period time4.

[0079] For example, time3 = 0.6s, time4 = 90s.

[0080] 213-4, if but:

[0081] When the Timer T-out If it is not turned on, turn on the Timer T-out ,

[0082] When the Timer T-out Enabled, but Timer T-out When the continuous opening time is less than the long time3,

[0083] When the Timer T-out Enabled, but Timer T-out When the continuous opening time is not less than time3, confirm Turn off the Timer T-out , update the operating status of the water-cooling outlet temperature sensor to fault, and update the operating status of the water-cooling outlet temperature sensor to normal after time4.

[0084] That is to say, when collecting the water cooling outlet temperature,

[0085] When the temperature value collected by the water cooling outlet temperature sensor In normal range If the temperature is within [-35℃,120.5℃], the temperature value is output. As the water cooling outlet temperature (Right now ).

[0086] When the collected temperature value Higher than (such as 120.5℃), the output is 120.5℃ (i.e. ).

[0087] When the collected temperature value Lower than (such as -35℃), then the output is -35℃ (i.e. ).

[0088] When the collected temperature value Higher than (such as 120.5℃) or When the temperature remains below -35℃ (such as -35℃) for time3 (such as 0.6s), the operating status of the water-cooled outlet temperature sensor is considered to be faulty; after the temperature returns to the normal range, it is delayed for time4 (such as 90s) and the operating status of the water-cooled outlet temperature sensor is updated to normal.

[0089] When the cold water outlet temperature sensor is in the fault state, the water cooling outlet temperature is the default value (i.e. like ).

[0090] 3. The process of collecting the internal temperature of the water cooling box

[0091] The collection of the internal temperature of the water cooling box can be achieved through steps 221 to 223.

[0092] 221, obtain the operating status of the temperature sensor inside the water cooling box.

[0093] The operating status is faulty or normal, and the initial value of the operating status of the temperature sensor inside the water cooling box is normal.

[0094] 222, if the operating state of the water cooling box internal temperature sensor is faulty, determine the internal temperature of the water cooling box The default value for the internal temperature of the water cooling box

[0095] like

[0096] 223, if the operating status of the temperature sensor inside the water cooling box is normal, execute the following steps 223-1 to 223-4:

[0097] 223-1, obtain the internal temperature of the water cooling box collected by the internal temperature sensor of the water cooling box

[0098] 223-2, if but And when the internal temperature timer of the water cooling box B-in If it is already on, turn off the Timer B-in .

[0099] in, is the preset minimum threshold of the internal temperature of the water cooling box. The preset maximum temperature threshold of the water cooling box. For example,

[0100] 223-3, if but:

[0101] When the Timer B-in If it is not turned on, turn on the Timer B-in ,

[0102] When the Timer B-in Enabled, but Timer B-in When the continuous opening time is less than the preset fifth time 5,

[0103] When the Timer B-in Enabled, but Timer B-in When the continuous opening time is not less than time5, confirm Turn off the Timer B-in , the operating status of the internal temperature sensor of the water cooling box is updated to fault, and the operating status of the internal temperature sensor of the water cooling box is updated to normal after the preset sixth time period time6.

[0104] For example, time5 = 0.6s, time6 = 90s.

[0105] 223-4, if but:

[0106] When the Timer B-in If it is not turned on, turn on the Timer B-in ,

[0107] When the Timer B-in Enabled, but Timer B-in When the continuous opening time is less than time5,

[0108] When the Timer B-in Enabled, but Timer B-in When the continuous opening time is not less than time5, confirm Turn off the Timer B-in , update the operating status of the temperature sensor inside the water cooling box to fault, and update the operating status of the temperature sensor inside the water cooling box to normal after time6.

[0109] That is to say, when collecting the internal temperature of the water cooling box,

[0110] When the temperature value collected by the temperature sensor inside the water cooling box In normal range If the temperature is within [-35℃,120.5℃], the temperature value is output. As the internal temperature of the water cooling box (Right now ).

[0111] When the collected temperature value Higher than (such as 120.5℃), the output is 120.5℃ (i.e. ).

[0112] When the collected temperature value Lower than (such as -35℃), then the output is -35℃ (i.e. ).

[0113] When the collected temperature value Higher than (such as 120.5℃) or lower When the temperature remains below -35°C (e.g., -35°C) for time5 (e.g., 0.6s), the operating status of the temperature sensor inside the water cooling box is considered to be faulty; after the temperature returns to the normal range, it is delayed for time6 (e.g., 90s), and then the operating status of the temperature sensor inside the water cooling box is updated to normal.

[0114] When the operating state of the water cooling box internal temperature sensor is faulty, the internal temperature of the water cooling box is the default value (i.e. like ).

[0115] 4. The process of collecting the internal temperature of the traction converter

[0116] The internal temperature of the traction converter can be collected through steps 231 to 233 .

[0117] 231, obtaining the operating status of the temperature sensor inside the traction converter.

[0118] The operating state is faulty or normal, and the initial value of the operating state of the temperature sensor inside the traction converter is normal.

[0119] 232, if the operating state of the internal temperature sensor of the traction converter is a fault, determine the internal temperature of the traction converter The default value of the internal temperature of the traction converter is preset

[0120] For example,

[0121] 233, if the operating state of the temperature sensor inside the traction converter is normal, execute the following steps 233-1 to 233-4:

[0122] 233-1, obtain the internal temperature of the traction converter collected by the internal temperature sensor of the traction converter

[0123] 233-2, if but And when the internal temperature timer of the traction converter T-inside If it is already on, turn off the Timer T-inside .

[0124] in, is the preset minimum threshold value of the internal temperature of the traction converter, is the preset maximum threshold value of the internal temperature of the traction converter. For example,

[0125] 233-3, if but:

[0126] When the Timer T-inside If it is not turned on, turn on the Timer T-inside ,

[0127] When the Timer T-inside Enabled, but Timer T-inside When the continuous opening time is less than the preset seventh time, time7,

[0128] When the Timer T-inside Enabled, but Timer T-inside When the continuous opening time is not less than time7, confirm Turn off the Timer T-inside , the operating status of the internal temperature sensor of the traction converter is updated to fault, and the operating status of the internal temperature sensor of the traction converter is updated to normal after the preset eighth time period time8.

[0129] For example, time7 = 10s, time8 = 90s.

[0130] 233-4, if but:

[0131] When the Timer T-inside If it is not turned on, turn on the Timer T-inside ,

[0132] When the Timer T-inside Enabled, but Timer T-inside When the continuous opening time is less than time7,

[0133] When the Timer T-inside Enabled, but Timer T-inside When the continuous opening time is not less than time7, confirm Turn off the Timer T-inside , the operating status of the internal temperature sensor of the traction converter is updated to fault, and the operating status of the internal temperature sensor of the traction converter is updated to normal after time8.

[0134] That is to say, when collecting the internal temperature of the traction converter,

[0135] When the temperature value collected by the internal temperature sensor of the traction converter In normal range If the temperature is within [-40℃, 211℃], the temperature value is output. As the internal temperature of the traction converter (Right now ).

[0136] When the collected temperature value Higher than (such as 211℃), the output is 211℃ (i.e. ).

[0137] When the collected temperature value Lower than (such as -40℃), then the output is -40℃ (i.e. ).

[0138] When the collected temperature value Higher than (such as 211℃) or lower When the temperature is above -40℃ (e.g., -40℃) and lasts for time7 (e.g., 10s), the operating status of the temperature sensor inside the traction inverter is considered to be faulty; after the temperature returns to the normal range, it is delayed for time8 (e.g., 90s), and then the operating status of the temperature sensor inside the traction inverter is updated to normal.

[0139] When the operating state of the internal temperature sensor of the traction converter is faulty, the internal temperature of the traction converter is the default value (i.e. like ).

[0140] 5. The process of collecting the filter circuit temperature of the traction converter

[0141] The temperature of the filter circuit of the traction converter can be collected through steps 241 to 243.

[0142] 241, obtaining the operating status of the temperature sensor of the traction converter filter circuit.

[0143] The operating state is faulty or normal, and the initial value of the operating state of the temperature sensor of the traction converter filter circuit is normal.

[0144] 242, if the operating state of the traction converter filter circuit temperature sensor is faulty, determine the filter circuit temperature of the traction converter The default temperature of the filter circuit of the traction converter is preset.

[0145] For example,

[0146] 243, if the operating state of the temperature sensor of the traction converter filter circuit is normal, execute the following steps 243-1 to 243-4:

[0147] 243-1, obtain the filter circuit temperature of the traction converter collected by the filter circuit temperature sensor of the traction converter

[0148] 243-2, if but And when the traction converter filter circuit temperature timer Timer T-f If it is already on, turn off the Timer T-f .

[0149] in, is the preset minimum temperature threshold of the traction converter filter circuit, is the preset maximum temperature threshold of the traction converter filter circuit. For example,

[0150] 243-3, if but:

[0151] When the Timer T-f If it is not turned on, turn on the Timer T-f ,

[0152] When the TimerT-f Enabled, but Timer T-f When the continuous opening time is less than the preset ninth time 9,

[0153] When the Timer T-f Enabled, but Timer T-f When the continuous opening time is not less than time9, confirm Turn off the Timer T-f , the operating status of the traction converter filter circuit temperature sensor is updated to fault, and the preset tenth time 10 Then the operating status of the traction converter filter circuit temperature sensor is updated to normal.

[0154] For example, time9 = 10s. 10 =90s.

[0155] 243-4, if but:

[0156] When the Timer T-f If it is not turned on, turn on the Timer T-f ,

[0157] When the Timer T-f Enabled, but Timer T-f When the continuous opening time is less than time9,

[0158] When the Timer T-f Enabled, but Timer T-f When the continuous opening time is not less than time9, confirm Turn off the Timer T-f , update the operating status of the traction converter filter circuit temperature sensor to fault, and 10 Then the operating status of the traction converter filter circuit temperature sensor is updated to normal.

[0159] That is to say, when collecting the filter circuit temperature of the traction converter,

[0160] When the temperature value collected by the temperature sensor of the traction converter filter circuit In normal range If the temperature is within [-40℃, 211℃], the temperature value is output. As the filter circuit temperature of the traction converter (Right now ).

[0161] When the collected temperature value Higher than (such as 211℃), the output is 211℃ (i.e. ).

[0162] When the collected temperature value Lower than (such as -40℃), then the output is -40℃ (i.e. ).

[0163] When the collected temperature value Higher than (such as 211℃) or lower If the temperature remains below -40℃ for a period of time 9 (e.g. 10s), the operating state of the temperature sensor of the traction converter filter circuit is considered to be faulty; after the temperature returns to the normal range, the delay time 10 After a certain time (such as 90s), the operating state of the temperature sensor of the traction converter filter circuit is updated to normal.

[0164] When the operating state of the traction converter filter circuit temperature sensor is faulty, the traction converter filter circuit temperature is the default value (i.e. like ).

[0165] 6. The process of collecting the chassis temperature of TCU

[0166] The board temperature of the TCU chassis is collected through the hard line on the TCU chassis.

[0167] For example, the TCU chassis temperature is collected by hard-line collection on the TCU chassis, and the board temperature value of the TCU chassis is collected after dimension conversion. The working condition of the TCU is judged according to the chassis temperature value and the working request of the output cooling system is output.

[0168] The cooling circuit temperature values ​​involved in this embodiment and subsequent embodiments are: when the operating state of the cold water inlet temperature sensor is normal, the cooling circuit temperature = the cold water inlet temperature; when the operating state of the cold water inlet temperature sensor is faulty, the cooling circuit temperature = the cooling circuit temperature is the cold water outlet temperature - 7°C.

[0169] 7. The process of collecting cooling inlet pressure

[0170] The cooling inlet pressure collected by the cooling inlet pressure sensor is obtained through the IO module.

[0171] 8. The process of collecting cooling outlet pressure

[0172] The cooling outlet pressure collected by the cooling outlet pressure sensor is obtained through the IO module.

[0173] 9. The process of collecting liquid level.

[0174] The liquid level is collected by collecting the low liquid level warning signal through the IO module.

[0175] 402, perform fault determination based on the operating parameters.

[0176] The judgment process of step 402 is specifically as follows:

[0177] 1. Cooling inlet pressure detection fault judgment

[0178] If the cooling inlet pressure is less than the minimum cooling inlet pressure threshold The duration of the eleventh time 11 , or, the cooling inlet pressure is greater than the cooling inlet pressure maximum threshold The duration reaches time 11 , it is judged that the cooling inlet pressure detection failure.

[0179] For example, time 11 =0.6s.

[0180] That is to say, if the cooling inlet pressure is lower than -1 bar or higher than 9 bar for 0.6 seconds, the collected cooling inlet pressure is not within the normal range. If the value is within [-1bar, 9bar], it is judged that the cooling inlet pressure detection failure.

[0181] 2. Cooling outlet pressure detection fault judgment

[0182] If the cooling outlet pressure is less than the minimum cooling outlet pressure threshold The duration reaches the twelfth time 12 , or, the cooling outlet pressure is greater than the cooling outlet pressure maximum threshold The duration reaches time 12 , it is judged that the cooling outlet pressure detection is faulty.

[0183] For example, time 12 =0.6s.

[0184] That is to say, if the cooling outlet pressure is lower than -1 bar or higher than 9 bar for 0.6 seconds, the collected cooling outlet pressure is not within the normal range. If the value is within [-1bar, 9bar], it is judged that the cooling outlet pressure detection failure occurs.

[0185] 3. Liquid level judgment

[0186] If the train is stationary and the liquid level meets the low warning condition for a period of time up to the thirteenth time 13 , then the liquid level is judged to be low.

[0187] If the train is stationary and the liquid level meets the low warning condition for a period of time exceeding the fourteenth time 14 , then the liquid level is judged to be extremely low.

[0188] For example, time 13 =20s, time 14 =60s.

[0189] If the low liquid level warning signal is collected through the IO module. When the train is stationary, the low liquid level warning signal lasts for time 13 If the liquid level low alarm signal lasts for time (such as 20s), it is judged that the liquid level is low. 14 Duration (such as 60s), judging that the liquid level is extremely low.

[0190] 4. Cooling water pump failure

[0191] If the cooling water pump failure condition is met, the cooling water pump is judged to be faulty.

[0192] Among them, the cooling water pump failure conditions include: there is no AC power on the AC bus, or any feedback AC circuit breaker of the cooling water pump's redundant DI (Data Input, digital input) collection is disconnected, or the cooling water pump starting contactor fails to close, or the cooling water pump starting contactor fails to open.

[0193] That is to say, if any of the following four situations occurs, the cooling water pump is considered to be faulty.

[0194] 1) There is no AC power on the AC bus;

[0195] 2) Any feedback AC circuit breaker of the redundant DI collection of the cooling water pump is disconnected;

[0196] 3) Cooling water pump start contactor closing failure;

[0197] 4) Cooling water pump starting contactor disconnection failure.

[0198] 5. Cooling water pump start contactor closing failure

[0199] If the failure condition to close is met, it is determined that the cooling water pump start contactor has a closing failure.

[0200] Among them, the failure conditions that cannot be closed include: the IO module communication is normal, the power supply is normal, and the output cooling water pump start command lasts for the thirty-second time 32 After that, the starting contactor is still feedback disconnected.

[0201] For example, time 32 =8s.

[0202] The power supply is normal, including: 110V power supply is normal, and the AC circuit breakers are all closed.

[0203] That is to say, when the IO module communication is normal, the power supply is normal (110V power supply is normal, and the AC circuit breaker is closed), the cooling water pump start command is output for a duration of 32 If the starting contactor still feedbacks disconnection after a certain period of time (such as 8s), it is judged that the cooling water pump starting contactor is closed.

[0204] 6. Cooling water pump start contactor disconnection failure

[0205] If the disconnection failure condition is met, it is determined that the cooling water pump starting contactor is disconnected.

[0206] Among them, the failure conditions that cannot be disconnected include: the IO module communication is normal, the power supply is normal, and the cooling water pump start instruction is withdrawn for a period of thirty-third time. 33 After that, the starting contactor still feedback closed.

[0207] For example, time 33 =4s.

[0208] The power supply is normal, including: 110V power supply is normal, and the AC circuit breakers are all closed.

[0209] That is to say, when the IO module communication is normal, the power supply is normal (110V power supply is normal, and the AC circuit breaker is closed), the cooling water pump start command is withdrawn for a period of time. 33 If the starting contactor is still closed after a certain period of time (such as 4s), it is judged that the starting contactor of the cooling water pump is disconnected.

[0210] When one of the above two faults occurs in the cooling water pump (i.e., cooling water pump starting contactor closing fault, cooling water pump starting contactor disconnecting fault), it is considered that the cooling water pump is faulty and cannot work normally.

[0211] 7. The cooling water pump is in working condition

[0212] If the cooling water pump working conditions are met, it is determined that the cooling water pump is in working condition.

[0213] Among them, the working conditions of the cooling water pump include: the IO module feedbacks that the cooling water pump AC circuit breaker is closed, and, after outputting the cooling water pump start command, the IO module feedback is received that the start contactor is closed, and there is no cooling water pump fault, then it is judged that the cooling water pump is in working state.

[0214] For example, the IO module feeds back that the two cooling water pump AC circuit breakers are closed, and after outputting the cooling water pump start command, the IO module feeds back that the start contactor is closed, and there is no cooling water pump fault, then it is judged that the cooling water pump is in working condition.

[0215] 8. High-speed contactor closing failure.

[0216] If there is no IO failure or no control circuit power failure, then when the fifteenth time of the cooling fan high-speed start command is output 15 After that, if the high-speed contactor still feedbacks disconnection, it is judged that the high-speed contactor is closed.

[0217] When the cooling fan high-speed start command is output again for the sixteenth time 16 If the high-speed contactor is closed, or if it is confirmed that the high-speed contactor is reset manually, the judgment of the high-speed contactor closing fault is cancelled.

[0218] For example, time 15 =4s. time 16 =4s.

[0219] That is to say, the output cooling fan high-speed start command time 15 If the high-speed contactor still feedbacks disconnection after a certain period of time (such as 4 seconds), it is judged that the high-speed contactor is closed.

[0220] If the cooling fan high-speed start command is output again, the high-speed contactor will start at time 16 If the high-speed contactor is closed within 4 seconds (e.g., within 4 seconds), or if it is confirmed that the high-speed contactor is manually reset, the judgment of the high-speed contactor closing fault is cancelled (i.e., the fault is reset).

[0221] When there is an IO fault or the control circuit loses power (such as the 110V control circuit loses power), the high-speed contactor closing fault will not be judged, and the judgment of the high-speed contactor closing fault cannot be cancelled, and it remains the same.

[0222] 9. High-speed contactor disconnection failure

[0223] If there is no IO failure, or no control circuit power failure, then when the cooling fan high-speed start command is withdrawn for the seventeenth time 17 After that, if the high-speed contactor still feedbacks closing, it is judged that the high-speed contactor is disconnected.

[0224] When the cooling fan high-speed start command is withdrawn again, the eighteenth time 18 If the high-speed contactor feedback is disconnected, or it is confirmed that the high-speed contactor is manually reset, the judgment of the high-speed contactor disconnection fault is cancelled.

[0225] For example, time17 =4s. time 18 =4s.

[0226] That is, when the cooling fan high-speed start command is withdrawn (i.e., the cooling fan high-speed start command is restored), the time 17 If the high-speed contactor is still closed after 4 seconds, the high-speed contactor is disconnected.

[0227] When the cooling fan high-speed start command is withdrawn again (i.e. the cooling fan high-speed start command disappears again) 18 If the high-speed contactor feedback is disconnected within a certain time (such as 4s), or it is confirmed that the high-speed contactor is manually reset, the judgment of the high-speed contactor disconnection fault is cancelled (that is, the fault is reset).

[0228] When there is an IO fault or the control circuit loses power (such as the 110V control circuit loses power), the high-speed contactor disconnection fault will not be judged, and the judgment of the high-speed contactor disconnection fault cannot be cancelled, and it remains the same.

[0229] 10. Fan high speed failure

[0230] If it is determined that the high-speed contactor has a closing fault, or the high-speed contactor has a disconnecting fault, or the AC circuit breaker of the cooling fan is disconnected, or the auxiliary does not output AC power, then it is determined that the fan has a high-speed fault.

[0231] After a fan high speed fault occurs, the cooling fan high speed start request is canceled.

[0232] 11. Low speed contactor closing failure

[0233] If there is no IO fault or no control circuit power failure, then when the cooling fan low speed start command is output for the nineteenth time 19 After that, if the low-speed contactor still feedbacks disconnection, it is judged that the low-speed contactor is closed.

[0234] When the cooling fan low speed start command is output again, the twentieth time 20 If the low-speed contactor is closed, or if it is confirmed that the low-speed contactor is reset manually, the judgment of the low-speed contactor closing fault is cancelled.

[0235] For example, time 19 =4s. time 20 =4s.

[0236] That is to say, the output cooling fan low speed start command time 19 If the low-speed contactor still feedbacks disconnection after a certain period of time (such as 4 seconds), it is judged that the low-speed contactor is closed.

[0237] If the cooling fan low speed start command is output again, the low speed contactor will start at time 20 If the low-speed contactor is closed within 4 seconds (e.g., within 4 seconds), or if it is confirmed that the low-speed contactor is reset manually, the judgment of the low-speed contactor closing fault is cancelled (i.e., the fault is reset).

[0238] When there is an IO fault or the control circuit loses power (such as the 110V control circuit loses power), the low-speed contactor closing fault will not be judged, and the judgment of the low-speed contactor closing fault cannot be cancelled, and it remains the same.

[0239] 12. Low speed contactor disconnection fault

[0240] If there is no IO failure, or no control circuit power failure, then when the cooling fan low speed start command is withdrawn, the 21st time 21 After the low-speed contactor is still fed back to close, it is judged that the low-speed contactor is disconnected.

[0241] When the cooling fan low speed start command is withdrawn again, the 22nd time 22 If the low-speed contactor feedback is disconnected, or it is confirmed that the low-speed contactor is manually reset, the judgment of the low-speed contactor disconnection fault is cancelled.

[0242] For example, time 21 =4s. time 22 =4s.

[0243] That is, when the cooling fan low speed start command is withdrawn (i.e., the cooling fan low speed start command is restored), the time 21 If the low-speed contactor is still closed after 4 seconds, the low-speed contactor is disconnected.

[0244] When the cooling fan low speed start command is withdrawn again (i.e. the cooling fan low speed start command disappears again) 22 If the low-speed contactor feedback is disconnected within a certain time (such as 4s), or if it is confirmed that the low-speed contactor is manually reset, the judgment of the low-speed contactor disconnection fault is cancelled (i.e., the fault is reset).

[0245] When there is an IO fault or the control circuit loses power (such as the 110V control circuit loses power), the low-speed contactor disconnection fault will not be judged, and the judgment of the low-speed contactor disconnection fault cannot be cancelled, and it remains the same.

[0246] 13. Fan low speed failure

[0247] If it is determined that the low-speed contactor has a closing fault, or the low-speed contactor has a disconnecting fault, or the AC circuit breaker of the cooling fan is disconnected, or the auxiliary does not output AC power, then it is determined that the fan has a low-speed fault.

[0248] 14. Cooling inlet pressure failure

[0249] If it is not an emergency mode, the operating state of the cooling inlet pressure sensor is normal, and the cooling inlet pressure is greater than the first pressure value F1 for a duration of time reaching the twenty-third duration time 23 , it is judged that the cooling inlet pressure is faulty.

[0250] For example, when F1 = 1.35 bar, time 23 =300s. When F1 = 1.4bar, time 23 =6s.

[0251] That is to say, if one of the following two situations occurs, it is judged that the cooling inlet pressure is faulty.

[0252] Case 1: When the operating status of the cooling inlet pressure sensor is normal (i.e., there is no inlet pressure detection fault), the detected cooling inlet pressure is greater than 1.35 bar and lasts for 300 seconds (i.e., 5 minutes). The cooling inlet pressure is considered abnormal and no diagnosis is performed in the emergency mode.

[0253] Case 2: When the operating status of the cooling inlet pressure sensor is normal (i.e., there is no inlet pressure detection fault), the detected cooling inlet pressure is greater than 1.4 bar and lasts for 6 seconds. The cooling inlet pressure is considered abnormal and no diagnosis is performed in the emergency mode.

[0254] 15. Cooling water pipe pressure failure

[0255] If it is determined that the cooling outlet pressure is faulty and the cooling inlet pressure is not less than the second pressure value F2, it is determined that the cooling water pipe pressure is faulty.

[0256] After determining that there is a cooling water pipe pressure failure, the cooling inlet pressure is less than the third pressure value F3, or the cooling outlet pressure is determined to be normal, then the cooling water pipe pressure is determined to be normal.

[0257] For example, F2 = 1.4 bar. F3 = 1.2 bar.

[0258] That is to say, when the cooling outlet pressure is judged to be faulty, if the cooling inlet pressure is detected to be not less than F3 (such as 1.4 bar) at the same time, it is judged that the cooling water pipe pressure is faulty; when the cooling inlet pressure is less than F3 (such as 1.2 bar) or the cooling outlet pressure is normal, it is judged that the cooling water pipe pressure is normal.

[0259] 16. The breaking pressure difference is too small.

[0260] If the traction converter is ready, the duration of the pressure difference being less than the first pressure difference value ΔF1 reaches the twenty-fourth duration time 24 , it is judged that the pressure difference is too small and abnormal.

[0261] After determining that the pressure difference is too small, the pressure difference is not less than the second pressure difference value ΔF2, or the duration of the pressure difference being less than ΔF1 reaches the twenty-fifth time. 25 , then the judgment of the abnormal pressure difference being too small is cancelled.

[0262] If the return pipe pressure detection is normal, the pressure difference is the difference between the cooling inlet pressure and the cooling outlet pressure (it should be noted that the difference is only a numerical value without a positive or negative sign, that is, the difference is the absolute value of the actual difference). If the return pipe pressure detection fails, the pressure difference is the cooling inlet pressure.

[0263] For example, ΔF1 = 0.34 bar. time 24 =60s. ΔF2 = 0.4bar. time 25 =900s.

[0264] That is to say, when the traction converter is ready and the pressure detection of the return pipe and the water supply pipe are normal, the duration of |cooling inlet pressure - cooling outlet pressure| < ΔF1 (such as 0.34 bar) reaches time 24 (such as 60s), it is judged that the pressure difference is too small and abnormal.

[0265] When the traction converter is ready, the return pipe pressure detection is normal, but the supply pipe pressure detection fails. Then, the duration of |cooling inlet pressure - cooling outlet pressure| < ΔF1 (such as 0.34 bar) reaches time 24 (such as 60s), it is judged that the pressure difference is too small and abnormal.

[0266] When the traction converter is ready, the return pipe pressure detection fails, but the supply pipe pressure detection is normal. Then, the duration of the cooling inlet pressure < ΔF1 (such as 0.34 bar) reaches time 24 (such as 60s), it is judged that the pressure difference is too small and abnormal.

[0267] When the traction converter is ready, but the pressure detection of the return pipe and the water supply pipe fails, then the duration of the cooling inlet pressure < ΔF1 (such as 0.34 bar) reaches time 24 (such as 60s), it is judged that the pressure difference is too small and abnormal.

[0268] After the pressure difference is judged to be too small, the pressure difference is not less than ΔF2 (such as 0.4 bar), or the pressure difference is less than ΔF1 (such as 0.34 bar) for a period of time 25 (such as 900s, i.e. 15 minutes), the judgment of the abnormal pressure difference being too small is cancelled.

[0269] When the pressure difference is judged to be abnormally small, measures to remove traction will be taken.

[0270] 17. Abnormal pressure difference

[0271] If the traction converter is ready, the duration of the pressure difference greater than the third pressure difference value ΔF3 reaches the twenty-sixth time 26 , it is judged that the pressure difference is too large and abnormal.

[0272] After determining that the pressure difference is too large, the pressure difference is not greater than the fourth pressure difference value ΔF4, or the duration of the pressure difference being greater than ΔF3 reaches the twenty-seventh duration time 27 , then the judgment of excessive pressure difference abnormality is cancelled.

[0273] If the return pipe pressure detection is normal, the pressure difference is the difference between the cooling inlet pressure and the cooling outlet pressure (it should be noted that the difference is only a numerical value without a positive or negative sign, that is, the difference is the absolute value of the actual difference). If the return pipe pressure detection fails, the pressure difference is the cooling inlet pressure.

[0274] For example, ΔF3 = 1.25 bar. time 26 =60s. ΔF4 =1.2bar. time 27 =900s.

[0275] That is to say, when the traction converter is ready and the pressure detection of the return pipe and the water supply pipe are normal, then the duration of |cooling inlet pressure-cooling outlet pressure|>ΔF3 (such as 1.25bar) reaches time 26 When the pressure difference is too large (such as 60s), it is judged that the pressure difference is abnormal.

[0276] When the traction converter is ready, the return pipe pressure detection is normal, but the supply pipe pressure detection fails. Then, the duration of |cooling inlet pressure - cooling outlet pressure|>ΔF3 (such as 1.25bar) reaches time 26 When the pressure difference is too large (such as 60s), it is judged that the pressure difference is abnormal.

[0277] When the traction converter is ready, the return pipe pressure detection fails, but the supply pipe pressure detection is normal. Then, the duration of the cooling inlet pressure > ΔF3 (such as 1.25 bar) reaches time 26 When the pressure difference is too large (such as 60s), it is judged that the pressure difference is abnormal.

[0278] When the traction converter is ready, but the pressure detection of the return pipe and the water supply pipe fails, then the duration of the cooling inlet pressure > ΔF3 (such as 1.25 bar) reaches time 26 When the pressure difference is too large (such as 60s), it is judged that the pressure difference is abnormal.

[0279] After the pressure difference is judged to be abnormal, the pressure difference is not greater than ΔF4 (such as 1.2 bar), or greater than ΔF3 (such as 1.25 bar) for a period of time 27 (such as 900s, i.e. 15 minutes), the judgment of excessive pressure difference abnormality is cancelled.

[0280] When the pressure difference is judged to be abnormally large, removal and traction measures will be taken.

[0281] 18. The outlet pressure difference is too large and abnormal

[0282] If the traction converter is ready, the duration of the pressure difference greater than the fifth pressure difference value ΔF5 reaches the twenty-eighth duration time 28 , it is judged that the outlet pressure difference is too large and abnormal.

[0283] After determining that the outlet pressure difference is abnormally large, if the pressure difference is not greater than the sixth pressure difference value ΔF6, the determination of the outlet pressure difference being abnormally large is cancelled.

[0284] If the return pipe pressure detection is normal, the pressure difference is the difference between the cooling inlet pressure and the cooling outlet pressure (it should be noted that the difference is only a numerical value without a positive or negative sign, that is, the difference is the absolute value of the actual difference). If the return pipe pressure detection fails, the pressure difference is the cooling inlet pressure.

[0285] For example, ΔF5 = 1.2 bar. time 28 =0.6s. ΔF6 =1.9bar.

[0286] That is to say, when the traction converter is ready and the pressure detection of the return pipe and the water supply pipe are normal, then the duration of |cooling inlet pressure-cooling outlet pressure|>ΔF5 (such as 1.2bar) reaches time 28 (such as 0.6s), it is judged that the outlet pressure difference is too large and abnormal.

[0287] When the traction converter is ready, the return pipe pressure detection is normal, but the supply pipe pressure detection fails. Then, the duration of |cooling inlet pressure - cooling outlet pressure|>ΔF5 (such as 1.2 bar) reaches time 28 (such as 0.6s), it is judged that the outlet pressure difference is too large and abnormal.

[0288] When the traction converter is ready, the return pipe pressure detection fails, but the supply pipe pressure detection is normal. Then, the duration of the cooling inlet pressure > ΔF5 (such as 1.2 bar) reaches time 28 (such as 0.6s), it is judged that the outlet pressure difference is too large and abnormal.

[0289] When the traction converter is ready, but the pressure detection of the return pipe and the water supply pipe fails, the duration of the cooling inlet pressure > ΔF5 (such as 1.2 bar) reaches time 28 (such as 0.6s), it is judged that the outlet pressure difference is too large and abnormal.

[0290] After judging that the outlet pressure difference is too large, if the pressure difference is not greater than ΔF6 (eg, 1.9 bar), the judgment that the outlet pressure difference is too large is cancelled (ie, the fault is reset).

[0291] When it is judged that the outlet pressure difference is abnormally large, measures will be taken to cut off the traction.

[0292] 19. The outlet pressure difference is too small.

[0293] If the traction converter is ready, the duration of the pressure difference being less than the seventh pressure difference value ΔF7 reaches the twenty-ninth duration time 29 After the outlet pressure difference is judged to be too small, if the pressure difference is not less than the eighth pressure difference value ΔF8, the judgment of the outlet pressure difference being too small is cancelled.

[0294] If the return pipe pressure detection is normal, the pressure difference is the difference between the cooling inlet pressure and the cooling outlet pressure (it should be noted that the difference is only a numerical value without a positive or negative sign, that is, the difference is the absolute value of the actual difference). If the return pipe pressure detection fails, the pressure difference is the cooling inlet pressure.

[0295] For example, ΔF7 = 0.4 bar. time 29 =0.6s. ΔF8 =0.42bar.

[0296] That is to say, when the cooling water pump is working, when the traction converter is ready and the pressure detection of the return pipe and the water supply pipe are normal, then the duration of |cooling inlet pressure - cooling outlet pressure| < ΔF7 (such as 0.4 bar) reaches time 29 (such as 0.6s), it is judged that the outlet pressure difference is too small and abnormal.

[0297] When the traction converter is ready, the return pipe pressure detection is normal, but the supply pipe pressure detection fails. Then, the duration of |cooling inlet pressure - cooling outlet pressure| < ΔF7 (such as 0.4 bar) reaches time 29 (such as 0.6s), it is judged that the outlet pressure difference is too small and abnormal.

[0298] When the traction converter is ready, the return pipe pressure detection fails, but the supply pipe pressure detection is normal. Then, the duration of the cooling inlet pressure < ΔF7 (such as 0.4 bar) reaches time 29 (such as 0.6s), it is judged that the outlet pressure difference is too small and abnormal.

[0299] When the traction converter is ready, but the pressure detection of the return pipe and the water supply pipe fails, the duration of the cooling inlet pressure < ΔF7 (such as 0.4 bar) reaches time 29 (such as 0.6s), it is judged that the outlet pressure difference is too small and abnormal.

[0300] After judging that the outlet pressure difference is too small, if the pressure difference is not less than ΔF8 (eg, 0.42 bar), the judgment that the outlet pressure difference is too small is cancelled (ie, the fault is reset).

[0301] When it is judged that the outlet pressure difference is too small and abnormal, measures will be taken to cut off the traction.

[0302] 20. Cooling system failure

[0303] If the cooling fan fails, or the cooling water pump fails, it is judged that the cooling system fails.

[0304] For example, if both cooling fan 1 and cooling fan 2 fail, or the cooling water pump fails, it is determined that the cooling system fails.

[0305] 21. Pressure difference failure occurs multiple times

[0306] If in the 30th time 30 The number of times that the pressure difference is less than the ninth pressure difference ΔF9 is greater than the preset number threshold, or the pressure difference is greater than the tenth pressure difference ΔF 10 The number of times is greater than the preset number threshold, or the pressure difference is greater than the eleventh pressure difference ΔF 11 The duration of the game reaches the thirty-first time 31 If the number of times is greater than the preset number threshold, it is determined that the pressure difference fault has occurred multiple times.

[0307] For example, time 30 =1800s. ΔF9=0.34bar. ΔF 10 =1.25bar. ΔF 11 =1.4bar. time 31 =10s. Preset times threshold =5.

[0308] That is to say, if at time 30 (e.g. 1800s, i.e. 30 minutes), the number of times the pressure difference is less than ΔF9 (e.g. 0.34bar) is greater than a preset number threshold (e.g. 5 times), or the pressure difference is greater than ΔF 10 (e.g. 1.25 bar) is greater than a preset threshold (e.g. 5 times), or the pressure difference is greater than ΔF 11 (such as 1.4bar) for a duration of time 31If the number of times (such as 10s) is greater than the preset number threshold (such as 5 times), it is determined that the pressure difference fault has occurred multiple times.

[0309] When it is determined that the pressure difference failure occurs multiple times, measures will be taken to block the main circuit breaker.

[0310] 403 , controlling the cooling system of the traction converter based on the fault judgment result.

[0311] The control of step 403 includes the output of instructions and the execution of protection measures, wherein the protection measures include reducing the power of the traction converter, cutting off the traction, and blocking the main breaker.

[0312] The specific control process of step 403 is as follows:

[0313] (I) Output instructions

[0314] 1. Output cooling water pump start command

[0315] If a cooling water pump start request is obtained and the cooling water pump start condition is met, a cooling water pump start instruction is output to control the traction converter cooling system to start the cooling water pump.

[0316] in,

[0317] (1) Cooling water pump start request

[0318] If there is no cooling inlet pressure detection fault and cooling outlet pressure detection fault in the fault judgment result, and the short-circuit contactor inside the traction converter is closed or the traction inverter pulse is activated, it is determined that the cooling water pump start request is obtained.

[0319] That is, if the following conditions are met and the cooling water pump needs to be started, it is determined that a cooling water pump start request is obtained.

[0320] ① The short-circuit contactor inside the traction converter is closed or the traction inverter pulse is activated.

[0321] ② There is no cooling inlet pressure detection fault and cooling outlet pressure detection fault in the fault judgment results.

[0322] (2) Cooling water pump starting conditions

[0323] The starting conditions of the cooling water pump include: the auxiliary equipment scheduling management releases the cooling water pump, the cooling water pump AC power supply circuit breaker is closed, the AC bus has AC power, and there is no cooling water pump failure.

[0324] For example, after receiving a cooling water pump start request, the CCU outputs a cooling water pump start instruction when all of the following conditions are met:

[0325] ① Auxiliary equipment scheduling management releases the cooling water pump.

[0326] ②The AC power supply circuit breaker of the cooling water pump is closed (any of the redundant DIs can be closed).

[0327] ③There is alternating current in the busbar.

[0328] ④There is no cooling water pump failure.

[0329] In addition, after the cooling water pump start command is output, if the cooling water pump stop condition is met, the cooling water pump start command is withdrawn to control the traction converter cooling system to stop starting the cooling water pump.

[0330] Among them, the cooling water pump stop conditions are: the auxiliary equipment scheduling management no longer releases the cooling water pump, or the cooling water pump start request disappears, or the cooling water pump AC circuit breaker is disconnected, or the AC bus has no AC power supply.

[0331] For example, when any of the following conditions is met, the CCU withdraws the cooling water pump start instruction:

[0332] ① The auxiliary equipment scheduling management no longer releases the cooling water pump.

[0333] ②The cooling water pump start request disappears.

[0334] ③The cooling water pump AC circuit breaker is disconnected.

[0335] ④There is no AC power supply on the AC bus.

[0336] The startup of 380V medium voltage loads is uniformly controlled by the medium voltage auxiliary equipment dispatching management module of the CCU, and each medium voltage load has a corresponding startup sequence. The traction converter water pump and cooling fan are both medium voltage AC loads and must also be controlled by the medium voltage load startup management module.

[0337] 2. Output cooling fan high-speed start command

[0338] When the cooling fan high-speed control condition is met, a cooling fan high-speed start instruction is output to control the traction converter cooling system to start the cooling fan at high speed.

[0339] Among them, the cooling fan high-speed control conditions include: meeting the enabling conditions, and there is no high-speed contactor closing fault, and there is no low-speed contactor opening fault, and there is no cooling fan low-speed working signal, and there is no cooling fan low-speed start instruction.

[0340] That is to say, if all the following conditions are met, the cooling fan high-speed start command is output:

[0341] ①Meet the enabling conditions.

[0342] ② High-speed contactor closing failure.

[0343] ③ There is no low-speed contactor disconnection failure.

[0344] ④There is no cooling fan low speed working signal.

[0345] ⑤ There is no cooling fan low speed start command.

[0346] The enabling condition is: there is a high-speed start enable and there is no low-speed start enable, or, when the cooling fan low-speed start instruction is output, there are both a high-speed start enable and a low-speed start enable.

[0347] That is to say, there is high-speed start enable but no low-speed start enable, or, when the cooling fan low-speed start command is output, both high-speed enable and low-speed enable exist.

[0348] (1) Low speed start enable

[0349] When the low-speed start signal conditions are met, and there is no low-speed contactor closing fault, and there is no low-speed contactor opening fault, it is determined that low-speed start enable exists.

[0350] The low-speed start signal conditions include: the presence of a high-speed working signal of the cooling fan and a high-speed contactor closing fault, or the presence of a low-speed working signal of the cooling fan.

[0351] That is to say, if there is a high-speed working signal of the cooling fan and a high-speed contactor closing fault, or if there is a low-speed working signal of the cooling fan and it is monitored that there is neither a low-speed contactor closing fault nor a low-speed contactor opening fault, then high-speed starting is enabled.

[0352] In specific implementation, when there is a low-speed contactor closing failure and low-speed operation is impossible, it will automatically switch to high-speed operation.

[0353] (2) High-speed startup enable

[0354] When the high-speed start signal conditions are met, and there is no high-speed contactor closing fault, and there is no high-speed contactor opening fault, it is determined that the high-speed start enable exists.

[0355] The high-speed start signal conditions include: the presence of a cooling fan low-speed operation signal and a low-speed contactor closing fault, or the presence of a cooling fan high-speed operation signal.

[0356] That is to say, when there is a low-speed working signal for the cooling fan and there is a low-speed contactor closing fault, or when there is a high-speed working signal for the cooling fan and it is detected that there is no high-speed contactor closing fault and no high-speed contactor opening fault, high-speed starting is enabled.

[0357] (3) Cooling fan low speed working signal

[0358] If the AC bus outputs AC power, and the auxiliary release converter cooling fan operates at a low speed, and the low-speed starting condition is met, it is determined that there is a cooling fan low-speed operation signal.

[0359] Among them, the low-speed start condition includes: obtaining a low-speed start request for the cooling fan, or obtaining a high-speed start request for the cooling fan but the high-speed circuit breaker of the cooling fan is disconnected, or obtaining a high-speed start request for the cooling fan but an IO fault of the circuit breaker is collected.

[0360] That is, when all of the following conditions are met, it is determined that there is a cooling fan low-speed operation signal:

[0361] ①The AC bus outputs AC power.

[0362] ② Auxiliary release converter cooling fan (such as cooling fan 1) at low speed.

[0363] ③ A low-speed start request for the cooling fan is obtained, or a high-speed start request for the cooling fan is obtained but the high-speed circuit breaker of the cooling fan is disconnected, or a high-speed start request for the cooling fan is obtained but an IO fault of the circuit breaker is collected.

[0364] In a specific implementation, when a high-speed start request for the cooling fan is obtained, but the circuit breaker IO fails (that is, the high-speed AC circuit breaker is not closed), the cooling fan will switch to low-speed operation.

[0365] (4) Cooling fan high-speed working signal

[0366] If the AC bus outputs AC power, and the auxiliary release converter cooling fan works at high speed, and a high-speed start request for the cooling fan is obtained, and the IO module of the converter fan circuit breaker is fault-free, and the high-speed AC power supply circuit breaker is closed, it is determined that there is a high-speed working signal for the cooling fan.

[0367] That is, when all of the following conditions are met, it is determined that there is a cooling fan high-speed operation signal:

[0368] ①The AC bus outputs AC power.

[0369] ② The auxiliary release converter cooling fan operates at high speed.

[0370] ③Get the cooling fan high-speed start request.

[0371] ④ The IO module of the acquisition converter fan circuit breaker is fault-free, and the high-speed AC power supply circuit breaker is closed.

[0372] (5) Cooling fan low speed start request

[0373] If the low-speed request acquisition condition is met, it is determined that the cooling fan low-speed start request is acquired.

[0374] The low-speed request acquisition condition is one of the following:

[0375] The cooling circuit temperature is less than the twelfth temperature t 12 , and the train speed is greater than the first speed v1. For example, t 12 =-10℃, v1=51km / h.

[0376] The cooling circuit temperature is greater than t 12 , and the train speed is greater than the second speed v2. For example, v2 = 1 km / h.

[0377] The cooling circuit temperature is less than t 12 , and the driver operates the cooling fan at high speed through the HMI (Human Machine Interface).

[0378] The driver operates the cooling fan at a low speed through the HMI;

[0379] Receive the train entry air volume reduction signal from CCU, and the water cooling inlet temperature is greater than the thirteenth temperature t 13 For example, t 13 =45℃.

[0380] The CCU does not send a signal to reduce the air volume when the train enters the station, and the water cooling inlet temperature is greater than the fourteenth temperature t 14 For example, t 14 =35℃, or, t 14 =60℃.

[0381] The CCU does not send a signal to reduce the air volume when the train enters the station, and the filter circuit temperature of the traction converter is greater than the fifteenth temperature t 15 For example, t 15 =105℃.

[0382] The CCU receives the signal of reducing the air volume when the train enters the station, and the filter circuit temperature of the traction converter is greater than the sixteenth temperature t 16 For example, t 16 =90℃.

[0383] It should be noted that the cooling circuit temperature values ​​involved in this embodiment and subsequent embodiments are: when the operating status of the cold water inlet temperature sensor is normal, the cooling circuit temperature = cold water inlet temperature; when the operating status of the cold water inlet temperature sensor is faulty, the cooling circuit temperature = the cooling circuit temperature is the cold water outlet temperature - 7°C.

[0384] In addition, after the cooling fan low-speed start request is obtained, if the low-speed request cancellation condition is satisfied, it is determined that the cooling fan low-speed start request is not obtained.

[0385] The low speed request cancellation condition is one of the following:

[0386] The cooling circuit temperature is less than t 12 The duration of the train speed not exceeding the third speed v3 reaches the thirty-sixth duration time 36 For example, v3 = 50.5 km / h, time 36 =1.5s.

[0387] The cooling circuit temperature is greater than t 12 The duration of the train speed not exceeding the fourth speed v4 reaches the thirty-seventh duration time 37 For example, v4 = 0.5 km / h, time 37 =1.5s.

[0388] Receive the train entry air volume reduction signal from CCU, and the water cooling inlet temperature is not greater than the seventeenth temperature t 17 For example, t 17 =40°C. In specific implementation, when the train is stationary and either the left door or the right door is released, it is considered that the train has entered the station and the air volume speed is reduced. At this time, the CCU will send a signal to reduce the air volume when the train enters the station.

[0389] The CCU does not send a signal to reduce the air volume when the train enters the station, and the water cooling inlet temperature is not greater than the eighteenth temperature t 18 Among them, t 18 The value of t 14 For example, if t 14 =35℃, then t 18 =30℃, if t 14 =60℃, then t 18 =50℃.

[0390] The CCU does not send a signal to reduce the air volume when the train enters the station, and the filter circuit temperature of the traction converter is not greater than the nineteenth temperature t 19 For example, t 19 =95℃.

[0391] The CCU receives the signal of reducing the air volume when the train enters the station, and the filter circuit temperature of the traction converter is not greater than the 20th temperature t 20 For example, t 20 =80℃.

[0392] The cooling fan low speed start request in this embodiment is a cooling fan 1 / 2 low speed operation request. In specific implementation, if you want to request the traction converter cooling fan (such as cooling fan 1) to start at a low speed, any of the following conditions must be met:

[0393] ①The cooling circuit temperature is less than t 12(such as -10℃), and the train speed is greater than v1 (such as 51km / h),

[0394] It is determined that a low-speed start request for the cooling fan is obtained.

[0395] After the cooling fan low speed start request is obtained, if the cooling circuit temperature is less than t 12 (like

[0396] -10℃), the train speed is not greater than v3 (such as 50.5km / h) for a duration of time 36 (eg, 1.5s), it is determined that the cooling fan low-speed start request is not obtained (ie, the cooling fan low-speed start request is stopped).

[0397] ②The cooling circuit temperature is greater than t 12 (such as -10℃), and the train speed is greater than v2 (such as 1km / h),

[0398] It is determined that a low-speed start request for the cooling fan is obtained.

[0399] After the cooling fan low speed start request is obtained, if the cooling circuit temperature is greater than t 12 (like

[0400] -10℃), the train speed is not greater than v4 (such as 0.5km / h) for a duration of time 37 (eg, 1.5s), it is determined that the cooling fan low-speed start request is not obtained (ie, the cooling fan low-speed start request is stopped).

[0401] ③The cooling circuit temperature is less than t 12 (such as -10°C), and the driver operates the cooling fan at high speed through the HMI, it is determined that a low-speed start request for the cooling fan is obtained.

[0402] ④ The driver operates the fan at a low speed through the HMI, and it is determined that the cooling fan low-speed start request is obtained.

[0403] ⑤ Receive the train entry air volume reduction signal from CCU, and the water cooling inlet temperature is greater than t 13 (such as 45° C.), it is determined that a low-speed start request for the cooling fan is obtained.

[0404] After confirming that the cooling fan low-speed start request is obtained, if the train entry air volume reduction signal is received from the CCU, and the water cooling inlet temperature is not greater than t 17 (such as 40° C.), it is determined that the cooling fan low-speed start request is not obtained (ie, the sending of the cooling fan low-speed start request is stopped).

[0405] ⑥ The CCU does not send a signal to reduce the air volume when the train enters the station, and the water cooling inlet temperature is greater than t14 (such as 35° C.), it is determined that a low-speed start request for the cooling fan is obtained.

[0406] After the cooling fan low-speed start request is obtained, if the CCU does not send a signal to reduce the train entry air volume, and the water cooling inlet temperature is not greater than t 18 (such as 30° C.), it is determined that the cooling fan low-speed start request is not obtained (ie, the sending of the cooling fan low-speed start request is stopped).

[0407] ⑦ The CCU does not send a signal to reduce the train air volume, and the water cooling inlet temperature is greater than t 14 (such as 60° C.), it is determined that a low-speed start request for the cooling fan is obtained.

[0408] After the cooling fan low-speed start request is obtained, if the CCU does not send a signal to reduce the train entry air volume, and the water cooling inlet temperature is not greater than t 18 (such as 50° C.), it is determined that the cooling fan low-speed start request is not obtained (ie, the sending of the cooling fan low-speed start request is stopped).

[0409] ⑧ The CCU does not send a signal to reduce the air volume when the train enters the station, and the filter circuit temperature of the traction converter is greater than t 15 (such as 105° C.), it is determined that a low-speed start request for the cooling fan is obtained.

[0410] After the cooling fan low-speed start request is obtained, if the CCU does not send a signal to reduce the train entry air volume, and the filter circuit temperature of the traction converter is not greater than t 19 (such as 95° C.), it is determined that the cooling fan low-speed start request is not obtained (ie, the sending of the cooling fan low-speed start request is stopped).

[0411] ⑨ The CCU receives the signal that the train enters the station with reduced air volume, and the filter circuit temperature of the traction converter is greater than t 16 (such as 90° C.), it is determined that a low-speed start request for the cooling fan is obtained.

[0412] After the cooling fan low-speed start request is obtained, if the train entry air volume reduction signal is received from the CCU, and the filter circuit temperature of the traction converter is not greater than t 20 (such as 80° C.), it is determined that the cooling fan low-speed start request is not obtained (ie, the sending of the cooling fan low-speed start request is stopped).

[0413] (6) Cooling fan high-speed start request

[0414] If the high-speed request acquisition condition is met, it is determined that the cooling fan high-speed start request is acquired.

[0415] The high-speed request acquisition condition is one of the following:

[0416] The chassis temperature of TCU is greater than the 21st temperature t 21 For example, t 21 =75℃.

[0417] The filter circuit temperature of the traction converter is greater than the 22nd temperature t 22 For example, t 22 =160℃.

[0418] In non-emergency traction mode, the water cooling outlet temperature sensor is operating normally, and the water cooling inlet temperature is greater than the 23rd temperature t 23 For example, t 23 =60℃.

[0419] In non-emergency traction mode, the water cooling outlet temperature sensor is in fault state, and the water cooling inlet temperature is greater than t 23 -Δt1. Δt1 is the first temperature difference, for example, Δt1 = 4°C.

[0420] In non-emergency traction mode, the water cooling outlet temperature is greater than the 24th temperature t 24 For example, t 24 =66℃.

[0421] The operating status of the water cooling outlet temperature sensor is faulty.

[0422] The operating status of the water cooling inlet temperature sensor is FAULT.

[0423] The operating status of the temperature sensor inside the water cooling box is faulty.

[0424] The operating status of the temperature sensor inside the traction converter is faulty.

[0425] The operating status of the traction converter filter circuit temperature sensor is faulty.

[0426] The train speed is greater than the fifth speed v5. For example, v5 = 65 km / h.

[0427] The cooling circuit temperature is not lower than the 25th temperature t 25 , and the driver operates the cooling fan at high speed through the HMI. For example, t 25 =-10℃.

[0428] The difference between the water cooling inlet temperature and the water cooling box internal temperature is greater than the second temperature difference Δt2. For example, Δt2 = 6°C. In addition, the difference here does not involve a sign, that is, the difference between the water cooling inlet temperature and the water cooling box internal temperature = |water cooling inlet temperature-water cooling box internal temperature|.

[0429] The operating state of the internal temperature sensor of the traction converter is normal, and the internal temperature of the traction converter is greater than the twenty-sixth temperature t 26 Among them, t 26 ∈[60℃,70℃], or, t 26 =85℃, for example, t 26 =70℃, or, t 26 =85℃.

[0430] Receive the train entry air volume reduction signal from CCU, and the water cooling inlet temperature is greater than the 27th temperature t 27 For example, t 27 =75℃.

[0431] The CCU receives the signal that the train enters the station with reduced air volume, and the filter circuit temperature of the traction converter is greater than the 28th temperature t 28 For example, t 28 =135℃.

[0432] In addition, after the cooling fan high-speed start request is obtained, if the high-speed request cancellation condition is satisfied, it is determined that the cooling fan high-speed start request is not obtained.

[0433] The high-speed request cancellation condition is one of the following:

[0434] The operating state of the internal temperature sensor of the traction converter is normal, and the internal temperature of the traction converter is not greater than the 29th temperature t 29 Among them, t 29 The value of t 26 For example, when t 26 =70℃, t 29 =55℃. 26 =85℃, t 29 =70℃.

[0435] Receive the train entry air volume reduction signal from CCU, and the water cooling inlet temperature is not greater than the 30th temperature t 30 For example, t 30 =50℃.

[0436] The CCU receives the signal of reducing the air volume when the train enters the station, and the filter circuit temperature of the traction converter is not greater than 31 degrees Celsius. 31 For example, t 31 =125℃.

[0437] The cooling fan high-speed start request in this embodiment is a cooling fan 1 / 2 high-speed operation request. In specific implementation, if a traction converter cooling fan (such as cooling fan 1) is requested to start at high speed, any of the following conditions must be met:

[0438] ①TCU chassis temperature is greater than t 21 (such as 75°C), it is determined that a high-speed start request for the cooling fan is obtained.

[0439] ② The filter circuit temperature of the traction converter is greater than t 22 (such as 160° C.), it is determined that a high-speed start request for the cooling fan is obtained.

[0440] ③ In non-emergency traction mode, the water cooling outlet temperature sensor is operating normally, and the water cooling inlet temperature is greater than t 23 (such as 60° C.), it is determined that a high-speed start request for the cooling fan is obtained.

[0441] ④ In non-emergency traction mode, the water cooling outlet temperature sensor is in a faulty state, and the water cooling inlet temperature is greater than t 23 -Δt1 (such as 60°C-4°C), it is determined that a high-speed start request for the cooling fan is obtained.

[0442] ⑤ In non-emergency traction mode, the water cooling outlet temperature is greater than t 24 (such as 66° C.), it is determined that a high-speed start request for the cooling fan is obtained.

[0443] ⑥ If the operating status of the water-cooling outlet temperature sensor is faulty, or the operating status of the water-cooling inlet temperature sensor is faulty, or the operating status of the temperature sensor inside the water cooling box is faulty, or the operating status of the temperature sensor inside the traction inverter is faulty, or the operating status of the temperature sensor of the traction inverter filter circuit is faulty, it is determined that a high-speed start request for the cooling fan is obtained.

[0444] ⑦ If the train speed is greater than v5 (e.g. 65km / h), it is determined that a high-speed start request for the cooling fan is obtained. ⑧ The cooling circuit temperature is not lower than t 25 (such as -10°C), and the driver operates the cooling fan at high speed through the HMI, it is determined that the cooling fan high-speed start request is obtained.

[0445] ⑨ If the difference between the water cooling inlet temperature and the internal temperature of the water cooling box is greater than Δt2 (eg, 6°C), or the operating status of the water cooling outlet temperature sensor and the internal temperature sensor of the water cooling box are both faulty, it is determined that a high-speed start request for the cooling fan is obtained.

[0446] ⑩The cooling cycle cannot detect the temperature (i.e. the water cooling outlet temperature sensor, the water cooling inlet temperature sensor,

[0447] The internal temperature sensor of the water cooling box, and the operating status of the three at the same time are all faulty), it is determined that a high-speed start request for the cooling fan is obtained.

[0448] The operating status of the internal temperature sensor of the traction converter is normal. The internal temperature of the traction converter is greater than t 26 (such as 70° C.), it is determined that a high-speed start request for the cooling fan is obtained.

[0449] After determining that the high-speed start request of the cooling fan is obtained, if the operating state of the internal temperature sensor of the traction converter is normal and the internal temperature of the traction converter is not greater than t 29 (such as 55° C.), it is determined that the cooling fan high-speed start request is not obtained (ie, the sending of the cooling fan high-speed start request is stopped).

[0450] The operating status of the internal temperature sensor of the traction converter is normal. The internal temperature of the traction converter is greater than t 26 (such as 85°C), it is determined that a high-speed start request for the cooling fan is obtained.

[0451] After determining that the high-speed start request of the cooling fan is obtained, if the operating state of the internal temperature sensor of the traction converter is normal and the internal temperature of the traction converter is not greater than t 29 (such as 70° C.), it is determined that the cooling fan high-speed start request is not obtained (ie, the sending of the cooling fan high-speed start request is stopped).

[0452] Receive the train entry air volume reduction signal from CCU, and the water cooling inlet temperature is greater than t 27 (such as 75°C), it is determined that a high-speed start request for the cooling fan is obtained.

[0453] After the cooling fan high-speed start request is obtained, if the CCU sends a signal to reduce the train entry air volume, and the water cooling inlet temperature is not greater than t 30 (such as 50° C.), it is determined that the cooling fan high-speed start request is not obtained (ie, the sending of the cooling fan high-speed start request is stopped).

[0454] The CCU receives the signal that the train enters the station with reduced air volume, and the filter circuit temperature of the traction converter is greater than t 28 (such as 135° C.), it is determined that a high-speed start request for the cooling fan is obtained.

[0455] After the cooling fan high-speed start request is obtained, if the train entry air volume reduction signal is received from the CCU, and the filter circuit temperature of the traction converter is not greater than t 31 (such as 125° C.), it is determined that the cooling fan high-speed start request is not obtained (ie, the sending of the cooling fan high-speed start request is stopped).

[0456] In addition, after the cooling fan high-speed start command is output, if the cooling fan high-speed stop condition is met, the cooling fan high-speed start command is withdrawn to control the traction converter cooling system to stop the high-speed start of the cooling fan.

[0457] The cooling fan high-speed stop conditions include: judging the high-speed contactor closing fault, or judging the low-speed contactor disconnection fault, or the presence of a cooling fan low-speed working signal, or the high-speed start enable disappears for a period of thirty-fifths of time after the cooling fan high-speed start command is output. 35 , or, output a cooling fan low speed start command.

[0458] For example, time 35 =1s.

[0459] That is, if any of the following conditions is met, the cooling fan high-speed start instruction is withdrawn (i.e., the cooling fan high-speed start instruction is canceled):

[0460] ① Determine whether the high-speed contactor is closed or not (i.e., a high-speed contactor is closed or not).

[0461] ② Determine whether the low-speed contactor is disconnected (i.e., a low-speed contactor is disconnected).

[0462] ③ There is a cooling fan low speed operation signal.

[0463] ④ After the cooling fan high-speed start command is output, the high-speed start enable disappears for a certain duration 35 (such as 1s).

[0464] ⑤ Output the cooling fan low speed start command.

[0465] 3. Output the cooling fan low speed start command

[0466] When the cooling fan low speed control condition is met, a cooling fan low speed start command is output to control the traction converter cooling system to start the cooling fan at a low speed.

[0467] Among them, the low-speed control conditions of the cooling fan include: the existence of low-speed start enable, and there is no low-speed contactor closing fault, and there is no high-speed contactor opening fault, and there is no high-speed contactor closing state, and there is no cooling fan high-speed start instruction.

[0468] That is, if all of the following conditions are met, the cooling fan low speed start command is output:

[0469] ① Low speed start is enabled.

[0470] ② There is no high-speed contactor disconnection failure.

[0471] ③ There is no high-speed contactor disconnection failure.

[0472] ④There is no high-speed contactor closed state.

[0473] ⑤ There is no cooling fan high-speed start instruction.

[0474] In addition, after the cooling fan low speed start command is output, if the cooling fan low speed stop condition is met, the cooling fan low speed start command is withdrawn to control the traction converter cooling system to stop the low speed start of the cooling fan.

[0475] Among them, the cooling fan low-speed stop conditions include: judging the low-speed contactor closing fault, or the high-speed contactor closing state, or judging the high-speed contactor disconnection fault, or outputting the cooling fan high-speed start command, or the low-speed start enable and the high-speed start enable disappear after the cooling fan low-speed start command is output, or the low-speed start enable and the high-speed start enable exist at the same time when the train runs at low speed.

[0476] That is, if any of the following conditions is met, the cooling fan low speed start command is withdrawn:

[0477] ① Determine the low-speed contactor closing fault (i.e. the low-speed contactor closing fault occurs).

[0478] ② High-speed contactor closed state.

[0479] ③ Determine whether the high-speed contactor is disconnected (i.e., a high-speed contactor is disconnected).

[0480] ④ Output cooling fan high-speed start command.

[0481] ⑤ After the cooling fan low-speed start command is output, both the low-speed start enable and high-speed start enable disappear.

[0482] ⑥ When the train runs at low speed, low-speed start enable and high-speed start enable exist at the same time.

[0483] (II) Protection measures

[0484] The protection measures include: reducing the power of the traction inverter, cutting off the traction, blocking the main breaker, and determining which protection measures to implement based on the range and status of the temperature values ​​of the traction inverter.

[0485] 1. Reduce the power of the traction converter

[0486] Reducing the power of the traction inverter means reducing the maximum power of the traction inverter. When the cooling system fails, reducing the operating power of the traction inverter and reducing the heat generation can protect the traction inverter and thus protect the safety of the train.

[0487] If it is not an emergency traction mode and the chassis temperature of the TCU is greater than the first temperature t1, the power of the traction converter is controlled to be equal to the power of the traction converter*k1, where k1 is the first limiting coefficient, such as t1=75°C, k1=75%.

[0488] If the operating state of the water-cooling inlet temperature sensor is normal and the water-cooling inlet temperature is within the first temperature range, the power of the traction converter is controlled to be equal to the power of the traction converter*k2. Wherein, k2 is the second limiting coefficient, such as the first temperature range is [60°C, 63°C]. k2∈[75%, 100%]. The value of k2 can be linearly determined according to the relationship between the water-cooling inlet temperature and the first temperature range, such as the closer the water-cooling inlet temperature is to 63°C, the closer k2 is to 75%.

[0489] If the operating state of the water-cooling outlet temperature sensor is normal and the water-cooling outlet temperature is within the second temperature range, the power of the traction converter is controlled to be equal to the power of the traction converter*k3. Wherein, k3 is the third limiting coefficient, such as the second temperature range is [66°C, 68°C]. k3∈[75%, 100%]. The value of k3 can be linearly determined according to the relationship between the water-cooling outlet temperature and the second temperature range, such as the closer the water-cooling outlet temperature is to 68°C, the closer k3 is to 75%.

[0490] If the operating state of the internal temperature sensor of the traction converter is normal and the internal temperature of the traction converter is within the third temperature range, the power of the traction converter is controlled to be equal to the power of the traction converter*k4. Wherein, k4 is the fourth limiting coefficient, such as the third temperature range is [60°C, 70°C]. k4∈[70%, 100%]. The value of k4 can be linearly determined according to the relationship between the internal temperature of the traction converter and the third temperature range, such as the closer the internal temperature of the traction converter is to 70°C, the closer k4 is to 70%.

[0491] If the operating parameters also include: motor stator temperature, then if it is not an emergency traction mode and the motor stator temperature is within the fourth temperature range, the power of the traction converter is controlled to be equal to the power of the traction converter*k5. Wherein, k5 is the fifth limiting coefficient, such as the fourth temperature range is [211°C, 231°C]. k5∈[50%, 100%]. The value of k5 can be linearly determined according to the relationship between the motor stator temperature and the fourth temperature range, such as the closer the motor stator temperature is to 231°C, the closer k5 is to 50%.

[0492] If it is not an emergency traction mode and the filter circuit temperature of the traction converter is within the fifth temperature range, the power of the traction converter is controlled to be equal to the power of the traction converter*k6. Wherein, k6 is the sixth limiting coefficient, such as the fifth temperature range is [160°C, 181°C]. k6∈[50%, 100%]. The value of k6 can be linearly determined according to the relationship between the filter circuit temperature of the traction converter and the fifth temperature range, such as the closer the filter circuit temperature of the traction converter is to 181°C, the closer k6 is to 50%.

[0493] That is, if one of the following conditions is met, the protective measure of reducing the power of the traction converter is executed:

[0494] ① When the temperature inside the TCU chassis is greater than t1 (such as 75°C), the power of the traction inverter is controlled to be equal to the power of the traction inverter*75%, that is, the maximum power is limited to 75%. There is no power limit in the emergency traction mode.

[0495] ② When the water-cooling inlet temperature is within the first temperature range (e.g., [60°C, 63°C]), the power of the traction converter is controlled as follows: power of the traction converter * k2, i.e., when the water-cooling inlet temperature is between 60°C and 63°C, the maximum power is linearly limited to 100%-75%. When the operating state of the water-cooling inlet temperature sensor is faulty, the power is not limited.

[0496] ③ When the water-cooling outlet temperature is within the second temperature range (such as [66°C, 68°C]), the power of the traction converter is controlled as follows: power of the traction converter * k3, that is, when the water-cooling outlet temperature is between 66°C and 68°C, the maximum power is linearly limited to 100%-75%. When the operating state of the water-cooling outlet temperature sensor is faulty, the power is not limited.

[0497] ④ When the internal temperature of the traction converter is within the third temperature range (e.g., [60°C, 70°C]), the power of the traction converter is controlled to be the power of the traction converter * k4, i.e., when the internal temperature of the traction converter is between 60°C and 70°C, the maximum power is linearly limited to 100%-70%. When the operating state of the internal temperature sensor of the traction converter is faulty, the power is not limited.

[0498] ⑤ If the motor stator temperature is within the fourth temperature range (e.g., [211°C, 231°C]), the power of the traction converter is controlled to be the power of the traction converter * k5, i.e., the internal temperature of the traction converter is between 211°C and 231°C, and the maximum power is linearly limited to 100%-50%. The emergency traction mode has no power limit.

[0499] ⑥ If the filter circuit temperature of the traction converter is within the fifth temperature range (e.g., [160°C, 181°C]), the power of the traction converter is controlled to be the power of the traction converter * k6, i.e., the internal temperature of the traction converter is between 160°C and 181°C, and the maximum power is linearly limited to 100%-50%. The emergency traction mode has no power limit.

[0500] 2. Resection and traction

[0501] If the temperature exceeds a certain limit, the traction can be cut off (that is, the traction inverter is directly blocked). In other words, the temperature exceeding the limit leads to inverter blocking.

[0502] If the case temperature of the TCU is greater than the second temperature t2, the traction is cut off. For example, t2 = 78°C.

[0503] If the internal temperature of the traction converter is greater than the third temperature t3, the traction is cut off, and is restored when the internal temperature of the traction converter is less than the fourth temperature t4. For example, t3 = 85.5°C. t4 = 70°C.

[0504] If the water cooling inlet temperature is greater than the fifth temperature t5, the traction is cut off. For example, t5 = 85.5°C.

[0505] If the operating status of the cold water inlet temperature sensor, the water cooling outlet temperature sensor, and the water cooling box internal temperature sensor are all in the fault state for a period of time exceeding the thirty-fourth time 34 , then remove the traction. For example, time 34 =0.6s.

[0506] If the water cooling inlet temperature is lower than the sixth temperature t6, the traction is cut off, and is restored when the water cooling inlet temperature is higher than the seventh temperature t7. For example, t6 = -30°C. t7 = 25°C.

[0507] If the water cooling outlet temperature is greater than the eighth temperature t8, the traction is cut off. For example, t8 = 85.5°C.

[0508] If the water cooling inlet temperature is lower than the ninth temperature t9, the traction is cut off. For example, t9 = -30°C.

[0509] If it is judged that the cooling inlet pressure is faulty, or the cooling water pipe pressure is faulty, or the outlet pressure difference is abnormally too large, or the outlet pressure difference is abnormally too small, or the cooling system is faulty, the traction is cut off.

[0510] If the pressure difference is judged to be too small, the pressure difference is not less than ΔF2, or the pressure difference is less than ΔF1 for a period of time 25 , then remove the traction. For example, ΔF1=0.34bar. ΔF2=0.4bar. time 25=900s.

[0511] If the pressure difference is judged to be abnormal, the pressure difference is not greater than ΔF4, or the pressure difference is greater than ΔF3 for a period of time 27 , then the traction is removed. For example, ΔF3=1.25bar. ΔF4=1.2bar. time 27 =900s.

[0512] If the fluid level is judged to be extremely low, a fault is reported and traction is cut off.

[0513] If the liquid level is judged to be low, a fault is reported.

[0514] That is, if one of the following conditions is met, the protective measure of removal traction is performed:

[0515] ① If the chassis temperature of the TCU is greater than t2 (such as 78°C), the traction is cut off.

[0516] ② If the internal temperature of the traction converter is greater than t3 (eg 85.5°C), the traction is cut off, and it is restored when the internal temperature of the traction converter is less than t4 (eg 70°C).

[0517] ③If the water cooling inlet temperature is greater than t5 (such as 85.5℃), cut off the traction.

[0518] ④ If the operating status of the cold water inlet temperature sensor, the water cooling outlet temperature sensor, and the water cooling box internal temperature sensor are all faulty for a period of time 34 (such as 0.6s), the traction is removed.

[0519] ⑤ If the water cooling inlet temperature is less than t6 (such as -30°C), the traction is cut off, and it is restored when the water cooling inlet temperature is greater than t7 (such as 25°C).

[0520] ⑥ If the water cooling outlet temperature is greater than t8 (such as 85.5℃), cut off the traction.

[0521] ⑦ If the water cooling inlet temperature is less than t9 (such as -30℃), cut off the traction.

[0522] ⑧ If it is judged that the cooling inlet pressure is faulty, or the cooling water pipe pressure is faulty, or the outlet pressure difference is abnormally too large, or the outlet pressure difference is abnormally too small, or the cooling system is faulty, then cut off the traction.

[0523] ⑨ If the pressure difference is judged to be too small, the pressure difference is not less than ΔF2 (such as 0.4 bar), or the pressure difference is less than ΔF1 (such as 0.34 bar) for a period of time 25 (such as 900s, i.e. 15 minutes), the traction is removed.

[0524] ⑩ If the pressure difference is judged to be too large, the pressure difference is not greater than ΔF4 (such as 1.2 bar), or the pressure difference is greater than ΔF3 (such as 1.25 bar) for a duration of time 27 (such as 900s, i.e. 15 minutes), the traction is removed.

[0525] If the fluid level is judged to be extremely low, the traction is removed.

[0526] 3. Block the main interrupt

[0527] If the chassis temperature of the TCU is greater than the tenth temperature t 10 , the main circuit breaker is blocked, and the chassis temperature of the TCU is lower than the eleventh temperature t 11 When the chassis temperature of the TCU reaches the shutdown limit, the main circuit breaker is disconnected. For example, t 10 =82.5°C. 11 =70℃.

[0528] If it is determined that the pressure difference fault occurs multiple times, the main circuit breaker is blocked.

[0529] That is, if one of the following conditions is met, the protection measure of blocking the main interrupt is executed:

[0530] ① If the chassis temperature of the TCU is greater than t 10 (such as 82.5℃), the main circuit breaker is blocked, and when the chassis temperature of the TCU is less than t 11 When the chassis temperature of the TCU reaches the shutdown limit,

[0531] Disconnect the main circuit breaker.

[0532] ② If it is determined that the pressure difference fault occurs multiple times, the main circuit breaker will be blocked.

[0533] The traction converter cooling system control method provided in this embodiment is a control method for the traction converter cooling system of a high-speed train. The method enables the CCU to serve as the control center of the train and independently complete the control of the traction converter cooling system and vehicle protection.

[0534] It should be noted that the present embodiment does not limit the relationship between different durations, pressure values, pressure differences, threshold values, temperatures, limit coefficients, temperature intervals, speeds, etc. In other words, different durations may be the same or different, different pressure values ​​may be the same or different, different pressure differences may be the same or different, different thresholds may be the same or different, different temperatures may be the same or different, different limit coefficients may be the same or different, different temperature intervals may or may not overlap, and different speeds may be the same or different.

[0535] The traction converter cooling system control method provided in this embodiment can be used to control the cooling systems of other systems, with high reuse rate and convenient modification. The traction converter cooling system control method provided in this embodiment takes into account the control of all devices of the entire cooling system of the traction converter, including the arrangement of corresponding relays and the collection and processing of basic data. It takes into account the pressure, temperature and other aspects of the traction converter cooling system to determine the cooling capacity.

[0536] The traction converter cooling system control method provided in this embodiment can perform power reduction or cut-off protection on the traction converter according to the cooling capacity, thereby effectively improving the driving safety of the train.

[0537] The present embodiment provides a control method for a traction converter cooling system, wherein each carriage of a train is equipped with a traction converter and a traction converter cooling system; the traction converter cooling system includes a cooling water pump and a cooling fan; the traction converter cooling system adopts a water cooling method, and realizes water circulation through a cooling water pump, and then cools the water through a cooling fan; the traction converter cooling system communicates with the CCU through an IO module; the method includes: collecting operating parameters, the operating parameters include: water cooling inlet temperature, water cooling outlet temperature, internal temperature of the water cooling box, internal temperature of the traction converter, filter circuit temperature of the traction converter, chassis temperature of the TCU, cooling inlet pressure, cooling outlet pressure and liquid level; performing fault judgment based on the operating parameters; and controlling the traction converter cooling system based on the fault judgment result. The method provided in the present embodiment can realize the control of the traction converter cooling system.

[0538] Based on the same inventive concept of the traction converter cooling system control method, this embodiment provides an electronic device, such as Figure 5 As shown, it includes: a memory 501, a processor 502, and a computer program.

[0539] The computer program is stored in the memory 501 and is configured to be executed by the processor 502 to implement the above-mentioned traction converter cooling system control method.

[0540] Specifically, each carriage of the train involved in the electronic equipment is equipped with a traction inverter and a traction inverter cooling system. The traction inverter cooling system includes a cooling water pump and a cooling fan. The traction inverter cooling system adopts a water cooling method, and the water is circulated through the cooling water pump, and then the water is cooled by the cooling fan. The traction inverter cooling system communicates with the central control unit CCU through the input and output IO module.

[0541] The implementation details of this method can be found in Figure 4 The embodiment shown.

[0542] The electronic device provided in this embodiment has a computer program executed by a processor to collect operating parameters, the operating parameters including: water cooling inlet temperature, water cooling outlet temperature, internal temperature of the water cooling box, internal temperature of the traction inverter, filter circuit temperature of the traction inverter, chassis temperature of the TCU, cooling inlet pressure, cooling outlet pressure and liquid level; perform fault judgment based on the operating parameters; and control the traction inverter cooling system based on the fault judgment result.

[0543] Based on the same inventive concept of the traction converter cooling system control method, this embodiment provides a computer-readable storage medium, and a computer program is stored thereon. The computer program is executed by a processor to implement the traction converter cooling system control method.

[0544] Specifically, each carriage of the train involved in the computer-readable storage medium is equipped with a traction converter and a traction converter cooling system. The traction converter cooling system includes a cooling water pump and a cooling fan. The traction converter cooling system adopts a water cooling method, and the water is circulated by the cooling water pump, and then the water is cooled by the cooling fan. The traction converter cooling system communicates with the central control unit CCU through the input and output IO module.

[0545] The implementation details of this method can be found in Figure 4 The embodiment shown.

[0546] The computer-readable storage medium provided in this embodiment has a computer program executed by a processor to collect operating parameters, which include: water cooling inlet temperature, water cooling outlet temperature, internal temperature of the water cooling box, internal temperature of the traction inverter, filter circuit temperature of the traction inverter, chassis temperature of the TCU, cooling inlet pressure, cooling outlet pressure and liquid level; perform fault judgment based on the operating parameters; and control the traction inverter cooling system based on the fault judgment result.

[0547] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of complete hardware embodiments, complete software embodiments, or embodiments in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code. The scheme in the embodiments of the present application can be implemented in various computer languages, for example, object-oriented programming language Java and literal scripting language JavaScript, etc.

[0548] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0549] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0550] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0551] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0552] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for controlling a cooling system of a traction converter, characterized in that: Each carriage of the train is equipped with a traction converter and a traction converter cooling system; the traction converter cooling system includes a cooling water pump and a cooling fan; the traction converter cooling system adopts a water cooling method, realizes water circulation through a cooling water pump, and then cools the water through a cooling fan; the traction converter cooling system communicates with the central control unit CCU through an input and output IO module; The method comprises: Collecting operating parameters, the operating parameters including: water cooling inlet temperature, water cooling outlet temperature, water cooling box internal temperature, traction converter internal temperature, traction converter filter circuit temperature, traction control unit TCU chassis temperature, cooling inlet pressure, cooling outlet pressure and liquid level; Performing fault judgment based on the operating parameters; The traction converter cooling system is controlled based on the fault judgment result.

2. The method according to claim 1, characterized in that Collecting the water cooling inlet temperature includes the following steps 201 to 203: 201, obtaining the operating state of the cold water inlet temperature sensor; the operating state is faulty or normal, and the initial value of the operating state of the cold water inlet temperature sensor is normal; 202, if the operating state of the cold water inlet temperature sensor is faulty, determine the water cooling inlet temperature The temperature of the cooling system for the traction converter 203, if the operating status of the cold water inlet temperature sensor is normal, execute the following steps 203-1 to 203-4: 203-1, obtaining the inlet temperature of the traction converter box collected by the cold water inlet temperature sensor 203-2, if but And when the water cooling inlet temperature timer T-in If it is already on, turn off the Timer T-in ;in, is the preset minimum inlet temperature threshold, is the preset maximum threshold of inlet temperature; 203-3, if Then when the Timer T-in If it is not turned on, turn on the Timer T-in , When the Timer T-in Enabled, but Timer T-in When the continuous opening time is less than the preset first time 1, When the Timer T-in Enabled, but Timer T-in When the continuous opening time is not less than time1, confirm Turn off the Timer T-in , update the operating state of the cold water inlet temperature sensor to fault, and update the operating state of the cold water inlet temperature sensor to normal after the preset second time period time2; 203-4, if Then when the Timer T-in If it is not turned on, turn on the Timer T-in , When the Timer T-in Enabled, but Timer T-in When the continuous opening time is less than time1, When the Timer T-in Enabled, but Timer T-in When the continuous opening time is not less than time1, confirm Turn off the Timer T-in , update the operating status of the cold water inlet temperature sensor to fault, and update the operating status of the cold water inlet temperature sensor to normal after time2; Collecting the water cooling outlet temperature includes the following steps 211 to 213: 211, obtaining the operating state of the water-cooling outlet temperature sensor; the operating state is faulty or normal, and the initial value of the operating state of the water-cooling outlet temperature sensor is normal; 212, if the operating state of the water cooling outlet temperature sensor is faulty, determine the water cooling outlet temperature The default value for the water cooling outlet temperature 213, if the operating status of the water cooling outlet temperature sensor is normal, execute the following steps 213-1 to 213-4: 213-1, obtaining the outlet temperature of the traction converter box collected by the water cooling outlet temperature sensor 213-2, if but And when the water cooling outlet temperature timer Timer T-out If it is already on, turn off the Timer T-out ;in, is the preset minimum threshold of outlet temperature, is the preset maximum threshold of outlet temperature; 213-3, if Then when the Timer T-out If it is not turned on, turn on the Timer T-out , When the Timer T-out Enabled, but Timer T-out When the continuous opening time is less than the preset third time 3, When the Timer T-out Enabled, but Timer T-out When the continuous opening time is not less than time3, confirm Turn off the Timer T-out , update the operating state of the water cooling outlet temperature sensor to fault, and update the operating state of the water cooling outlet temperature sensor to normal after the preset fourth time length time4; 213-4, if Then when the Timer T-out If it is not turned on, turn on the Timer T-out , When Timer T-out Enabled, but Timer T-out When the continuous opening time is less than the long time3, When Timer T-out Enabled, but Timer T-out When the continuous opening time is not less than time3, confirm Turn off the Timer T-out , update the operating status of the water cooling outlet temperature sensor to fault, and update the operating status of the water cooling outlet temperature sensor to normal after time4; Collecting the internal temperature of the water cooling box includes the following steps 221 to 223: 221, obtaining the operating state of the temperature sensor inside the water cooling box; the operating state is faulty or normal, and the initial value of the operating state of the temperature sensor inside the water cooling box is normal; 222, if the operating state of the water cooling box internal temperature sensor is faulty, determine the internal temperature of the water cooling box The default value for the internal temperature of the water cooling box 223, if the operating status of the temperature sensor inside the water cooling box is normal, execute the following steps 223-1 to 223-4: 223-1, obtaining the internal temperature of the water cooling box collected by the internal temperature sensor of the water cooling box 223-2, if but And when the internal temperature timer of the water cooling box B-in If it is already on, turn off the Timer B-in ;in, is the preset minimum threshold of the internal temperature of the water cooling box. It is the preset maximum threshold of the internal temperature of the water cooling box; 223-3, if Then when the Timer B-in If it is not turned on, turn on the Timer B-in , When Timer B-in Enabled, but Timer B-in When the continuous opening time is less than the preset fifth time 5, When Timer B-in Enabled, but Timer B-in When the continuous opening time is not less than time5, confirm Turn off the Timer B-in , update the operating status of the temperature sensor inside the water cooling box to fault, and update the operating status of the temperature sensor inside the water cooling box to normal after the preset sixth time length time6; 223-4, if Then when the Timer B-in If it is not turned on, turn on the Timer B-in , When the Timer B-in Enabled, but Timer B-in When the continuous opening time is less than time5, When the Timer B-in Enabled, but Timer B-in When the continuous opening time is not less than time5, confirm Turn off the Timer B-in , update the operating status of the temperature sensor inside the water cooling box to fault, and update the operating status of the temperature sensor inside the water cooling box to normal after time6; Collecting the internal temperature of the traction converter includes the following steps 231 to 233: 231, obtaining the operating state of the internal temperature sensor of the traction converter; the operating state is faulty or normal, and the initial value of the operating state of the internal temperature sensor of the traction converter is normal; 232, if the operating state of the internal temperature sensor of the traction converter is a fault, determine the internal temperature of the traction converter The default value of the internal temperature of the traction converter is t0. I ; 233. If the operating state of the temperature sensor inside the traction converter is normal, execute the following steps 233-1 to 233-4: 233-1, obtaining the internal temperature of the traction converter collected by the internal temperature sensor of the traction converter 233-2, if but And when the internal temperature timer of the traction converter T-inside If it is already on, turn off the Timer T-inside ;in, is the preset minimum threshold value of the internal temperature of the traction converter, is a preset maximum threshold value of the internal temperature of the traction converter; 233-3, if Then when the Timer T-inside If it is not turned on, turn on the Timer T-inside , When Timer T-inside Enabled, but Timer T-inside When the continuous opening time is less than the preset seventh time, time7, When Timer T-inside Enabled, but Timer T-inside When the continuous opening time is not less than time7, confirm Turn off the Timer T-inside , updating the operating state of the internal temperature sensor of the traction converter to fault, and updating the operating state of the internal temperature sensor of the traction converter to normal after the preset eighth time duration time8; 233-4, if Then when the Timer T-inside If it is not turned on, turn on the Timer T-inside , When Timer T-inside Enabled, but Timer T-inside When the continuous opening time is less than time7, When Timer T-inside Enabled, but Timer T-inside When the continuous opening time is not less than time7, confirm Turn off the Timer T-inside , update the operating status of the internal temperature sensor of the traction converter to fault, and update the operating status of the internal temperature sensor of the traction converter to normal after time8; Collecting the filter circuit temperature of the traction converter includes the following steps 241 to 243: 241, obtaining an operating state of a temperature sensor of a filter circuit of a traction converter; the operating state is faulty or normal, and an initial value of the operating state of the temperature sensor of the filter circuit of the traction converter is normal; 242, if the operating state of the temperature sensor of the filter circuit of the traction converter is a fault, determine the temperature of the filter circuit of the traction converter The default temperature of the filter circuit of the traction converter is preset. 243, if the operating state of the temperature sensor of the traction converter filter circuit is normal, execute the following steps 243-1 to 243-4: 243-1, obtaining the filter circuit temperature of the traction converter collected by the filter circuit temperature sensor of the traction converter 243-2, if but And when the traction converter filter circuit temperature timer Timer T-f If it is already on, turn off the Timer T-f ;in, is the preset minimum temperature threshold of the traction converter filter circuit, is a preset maximum temperature threshold of the filter circuit of the traction converter; 243-3, if Then when the Timer T-f If it is not turned on, turn on the Timer T-f , When Timer T-f Enabled, but Timer T-f When the continuous opening time is less than the preset ninth time 9, When Timer T-f Enabled, but Timer T-f When the continuous opening time is not less than time9, confirm Turn off the Timer T-f , the operating status of the traction converter filter circuit temperature sensor is updated to fault, and the preset tenth time 10 Then the operating state of the temperature sensor of the traction converter filter circuit is updated to normal; 243-4, if Then when the Timer T-f If it is not turned on, turn on the Timer T-f , When Timer T-f Enabled, but Timer T-f When the continuous opening time is less than time9, When Timer T-f Enabled, but Timer T-f When the continuous opening time is not less than time9, confirm Close Time T-f , update the operating status of the traction converter filter circuit temperature sensor to fault, and 10 Then the operating state of the temperature sensor of the traction converter filter circuit is updated to normal; The chassis temperature of the TCU is collected, including: collecting the board temperature of the TCU chassis through a hard line on the TCU chassis.

3. The method according to claim 2, characterized in that time1=0.6s;time2=90s; time3=0.6s;time4=90s; time5=0.6s;time6=90s; time7=10s;time8=90s; time9=10s;time 10 =90s。 4. The method according to claim 1, characterized in that The performing fault judgment based on the operating parameters includes: If the cooling inlet pressure is less than the minimum cooling inlet pressure threshold The duration of the eleventh time 11 , or, the cooling inlet pressure is greater than the cooling inlet pressure maximum threshold The duration reaches time 11 , it is judged that the cooling inlet pressure detection fault; If the cooling outlet pressure is less than the minimum cooling outlet pressure threshold The duration reaches the twelfth time 12 , or, the cooling outlet pressure is greater than the cooling outlet pressure maximum threshold The duration reaches time 12 , it is judged that the cooling outlet pressure detection fault; If the train is stationary and the liquid level meets the low warning condition for a period of time up to the thirteenth time 13 , then the liquid level is judged to be low; If the train is stationary and the liquid level meets the low warning condition for a period of time exceeding the fourteenth time 14 , then the liquid level is judged to be extremely low; If the cooling water pump fault condition is met, the cooling water pump fault is determined; wherein the cooling water pump fault conditions include: there is no AC power on the AC bus, or any feedback AC circuit breaker of the redundant digital input DI of the cooling water pump is disconnected, or the cooling water pump start contactor is closed, or the cooling water pump start contactor is disconnected; If the working conditions of the cooling water pump are met, it is judged that the cooling water pump is in working state; wherein, the working conditions of the cooling water pump include: the IO module feedbacks that the AC circuit breaker of the cooling water pump is closed, and, after outputting the cooling water pump start command, the IO module feedback is received that the start contactor is closed, and, there is no cooling water pump fault, then it is judged that the cooling water pump is in working state; If there is no IO failure or no control circuit power failure, then when the fifteenth time of the cooling fan high-speed start command is output 15 After that, if the high-speed contactor still feedbacks disconnection, it is judged that the high-speed contactor is closed. When the cooling fan high-speed start command is output again for the sixteenth time 16 The high-speed contactor feedback is closed, or after confirming that the high-speed contactor is manually reset, the judgment of the high-speed contactor closing fault is cancelled; If there is no IO failure, or no control circuit power failure, then when the cooling fan high-speed start command is withdrawn for the seventeenth time 17 After that, if the high-speed contactor still replies closed, it is judged that the high-speed contactor is disconnected; when the eighteenth time of the cooling fan high-speed start command is withdrawn again 18 The high-speed contactor feedback is disconnected, or after confirming that the high-speed contactor is manually reset, the judgment of the high-speed contactor disconnection fault is cancelled; If it is judged that the high-speed contactor is closed or disconnected, or the AC circuit breaker of the cooling fan is disconnected, or the auxiliary does not output AC power, then it is judged that the fan is at high speed fault; If there is no IO fault or no control circuit power failure, then when the cooling fan low speed start command is output for the nineteenth time 19 After that, if the low-speed contactor is still feedback disconnected, it is judged that the low-speed contactor is closed. When the cooling fan low-speed start command is output again, the twentieth time 20 If the low-speed contactor is closed, or if it is confirmed that the low-speed contactor is reset manually, the judgment of the low-speed contactor closing fault is cancelled; If there is no IO failure, or no control circuit power failure, then when the cooling fan low speed start command is withdrawn, the 21st time 21 After that, if the low-speed contactor is still closed, it is judged that the low-speed contactor is disconnected. When the cooling fan low-speed start command is withdrawn again, the 22nd time 22 The low-speed contactor feedback is disconnected, or after confirming that the low-speed contactor is manually reset, the judgment of the low-speed contactor disconnection fault is cancelled; If it is judged that the low-speed contactor is closed or disconnected, or the AC circuit breaker of the cooling fan is disconnected, or the auxiliary does not output AC power, then it is judged that the fan is at low speed; If it is not an emergency mode, the operating state of the cooling inlet pressure sensor is normal, and the cooling inlet pressure is greater than the first pressure value F1 for a duration of time reaching the twenty-third duration time 23 , it is judged that the cooling inlet pressure is faulty; If it is determined that the cooling outlet pressure is faulty and the cooling inlet pressure is not less than the second pressure value F2, then it is determined that the cooling water pipe pressure is faulty; after determining that the cooling water pipe pressure is faulty, if the cooling inlet pressure is less than the third pressure value F3, or if it is determined that the cooling outlet pressure is normal, then it is determined that the cooling water pipe pressure is normal; If the traction converter is ready, the duration of the pressure difference being less than the first pressure difference value ΔF1 reaches the twenty-fourth duration time 24 , then the pressure difference is judged to be too small abnormal; after the pressure difference is judged to be too small abnormal, the pressure difference is not less than the second pressure difference value ΔF2, or the pressure difference is less than ΔF1 for a duration of up to the twenty-fifth time 25 , then the judgment of the abnormal pressure difference being too small is cancelled; if the return pipe pressure detection is normal, the pressure difference is the difference between the cooling inlet pressure and the cooling outlet pressure; if the return pipe pressure detection fails, the pressure difference is the cooling inlet pressure; If the traction converter is ready, the duration of the pressure difference greater than the third pressure difference value ΔF3 reaches the twenty-sixth time 26 , then the pressure difference is judged to be too large abnormal; after the pressure difference is judged to be too large abnormal, the pressure difference is not greater than the fourth pressure difference value ΔF4, or the pressure difference is greater than ΔF3 for a duration of up to the twenty-seventh duration time 27 , then the judgment of excessive pressure difference abnormality is cancelled; If the traction converter is ready, the duration of the pressure difference greater than the fifth pressure difference value ΔF5 reaches the twenty-eighth duration time 28 , it is judged that the outlet pressure difference is too large abnormally; after judging that the outlet pressure difference is too large abnormally, if the pressure difference is not greater than the sixth pressure difference value ΔF6, the judgment that the outlet pressure difference is too large abnormally is cancelled; If the traction converter is ready, the duration of the pressure difference being less than the seventh pressure difference value ΔF7 reaches the twenty-ninth duration time 29 , it is judged that the outlet pressure difference is too small abnormally; after judging that the outlet pressure difference is too small abnormally, if the pressure difference is not less than the eighth pressure difference value ΔF8, the judgment that the outlet pressure difference is too small abnormally is cancelled; If the cooling fan fails, or the cooling water pump fails, it is judged that the cooling system fails; If in the 30th time 30 The number of times that the pressure difference is less than the ninth pressure difference ΔF9 is greater than the preset number threshold, or the pressure difference is greater than the tenth pressure difference ΔF 10 The number of times is greater than the preset number threshold, or the pressure difference is greater than the eleventh pressure difference ΔF 11 The duration of the game reaches the thirty-first time 31 If the number of times is greater than the preset number threshold, it is determined that the pressure difference fault has occurred multiple times.

5. The method according to claim 4, characterized in that time 11 =0.6s; time 12 =0.6s; time 13 =20s;time 14 =60s; time 15 =4s;time 16 =4s;time 17 =4s;time 18 =4s; time 19 =4s;time 20 =4s;time 21 =4s;time 22 =4s; When F1=1.35bar, time 23 =300s; when F1 = 1.4bar, time 23 =6s; F2 = 1.4 bar; F3 = 1.2 bar; ΔF1=0.34bar;time 24 =60s;ΔF2=0.4bar;time 25 =900s; ΔF3=1.25bar;time 26 =60s;ΔF4=1.2bar;time 27 =900s; ΔF5=1.2bar;time 28 =0.6s;ΔF6=1.9bar; ΔF7=0.4bar;time 29 =0.6s;ΔF8=0.42bar; time 30 =1800s; ΔF9=0.34bar; ΔF 10 =1.25bar; ΔF 11 =1.4bar; time 31 =10s; preset times threshold = 5.

6. The method according to claim 4, characterized in that If the failure condition of closing is met, the cooling water pump start contactor is judged to be closed; wherein the failure condition of closing includes: the IO module communication is normal, and the power supply is normal, and the cooling water pump start instruction is output for a duration of thirty-second time 32 After that, the starting contactor still feedback disconnects; If the disconnection failure condition is met, the cooling water pump start contactor disconnection failure is determined; wherein the disconnection failure condition includes: the IO module communication is normal, and the power supply is normal, and the cooling water pump start instruction is withdrawn for a duration of thirty-third time 33 After that, the starting contactor still feedback closed.

7. The method according to claim 6, characterized in that time 32 =8s;time 33 =4s; The power supply is normal, including: the 110V power supply is normal, and the AC circuit breakers are all closed.

8. The method according to claim 1, characterized in that The operating parameters also include: motor stator temperature; The controlling the cooling system of the traction converter based on the fault judgment result includes: If a cooling water pump start request is obtained and the cooling water pump start condition is met, a cooling water pump start instruction is output to control the traction converter cooling system to start the cooling water pump; wherein the cooling water pump start condition includes: the auxiliary equipment scheduling management releases the cooling water pump, and the cooling water pump AC power supply circuit breaker is closed, and the AC bus has AC power, and there is no cooling water pump fault; When the high-speed control condition of the cooling fan is met, a high-speed start instruction of the cooling fan is output to control the cooling system of the traction converter to start the cooling fan at high speed; wherein the high-speed control condition of the cooling fan includes: the enabling condition is met, and there is no high-speed contactor closing fault, and there is no low-speed contactor disconnection fault, and there is no low-speed working signal of the cooling fan, and there is no low-speed start instruction of the cooling fan; the enabling condition is: there is a high-speed start enable and there is no low-speed start enable, or, when the low-speed start instruction of the cooling fan is output, both the high-speed start enable and the low-speed start enable exist; When the cooling fan low-speed control condition is met, a cooling fan low-speed start instruction is output to control the traction converter cooling system to start the cooling fan at a low speed; the cooling fan low-speed control condition includes: there is a low-speed start enable, and there is no low-speed contactor closing fault, and there is no high-speed contactor opening fault, and there is no high-speed contactor closing state, and there is no cooling fan high-speed start instruction; If it is not an emergency traction mode and the chassis temperature of the TCU is greater than the first temperature t1, the power of the traction converter is controlled to be equal to the power of the traction converter*k1; wherein k1 is the first limiting coefficient; If the operating state of the water-cooling inlet temperature sensor is normal and the water-cooling inlet temperature is within the first temperature range, the power of the traction converter is controlled to be equal to the power of the traction converter*k2; wherein k2 is the second limiting coefficient; If the operating state of the water-cooling outlet temperature sensor is normal and the water-cooling outlet temperature is within the second temperature range, the power of the traction converter is controlled to be equal to the power of the traction converter*k3; wherein k3 is the third limiting coefficient; If the operating state of the internal temperature sensor of the traction converter is normal and the internal temperature of the traction converter is within the third temperature range, the power of the traction converter is controlled to be equal to the power of the traction converter*k4; wherein k4 is a fourth limiting coefficient; If it is not an emergency traction mode and the motor stator temperature is within the fourth temperature range, the power of the traction converter is controlled to be equal to the power of the traction converter*k5; wherein k5 is the fifth limiting coefficient; If it is not an emergency traction mode and the temperature of the filter circuit of the traction converter is within the fifth temperature range, the power of the traction converter is controlled to be equal to the power of the traction converter*k6; wherein k6 is the sixth limiting coefficient; If the chassis temperature of the TCU is greater than the second temperature t2, the traction is cut off; If the internal temperature of the traction converter is greater than the third temperature t3, the traction is cut off, and the traction is restored when the internal temperature of the traction converter is less than the fourth temperature t4; If the water cooling inlet temperature is greater than the fifth temperature t5, the traction is cut off; If the operating status of the cold water inlet temperature sensor, the water cooling outlet temperature sensor, and the water cooling box internal temperature sensor are all in the fault state for a period of time exceeding the thirty-fourth time 34 , then remove the traction; If the water-cooling inlet temperature is lower than the sixth temperature t6, the traction is cut off, and it is restored when the water-cooling inlet temperature is higher than the seventh temperature t7; If the water cooling outlet temperature is greater than the eighth temperature t8, the traction is cut off; If the water cooling inlet temperature is lower than the ninth temperature t9, the traction is cut off; If it is judged that the cooling inlet pressure is faulty, or the cooling water pipe pressure is faulty, or the outlet pressure difference is abnormally too large, or the outlet pressure difference is abnormally too small, or the cooling system is faulty, the traction is cut off; If the pressure difference is judged to be too small, the pressure difference is not less than ΔF2, or the pressure difference is less than ΔF1 for a period of time 25 , then remove the traction; If the pressure difference is judged to be abnormal, the pressure difference is not greater than ΔF4, or the pressure difference is greater than ΔF3 for a period of time 27 , then remove the traction; If the liquid level is judged to be extremely low, a fault is reported and the traction is cut off; If the liquid level is judged to be low, a fault is reported; If the chassis temperature of the TCU is greater than the tenth temperature t 10 , the main circuit breaker is blocked, and the chassis temperature of the TCU is lower than the eleventh temperature t 11 When the temperature of the TCU chassis reaches the shutdown limit, the main circuit breaker is disconnected; If it is determined that the pressure difference fault occurs multiple times, the main circuit breaker is blocked.

9. The method according to claim 8, characterized in that t1=75℃;k1=75%; The first temperature interval is [60℃, 63℃]; k2∈[75%, 100%]; The second temperature interval is [66°C, 68°C]; k3∈[75%, 100%]; The third temperature interval is [60℃, 70℃]; k4∈[70%, 100%]; The fourth temperature interval is [211°C, 231°C]; k5∈[50%, 100%]; The fifth temperature interval is [160°C, 181°C]; k6∈[50%, 100%]; t2=78℃; t3=85.5℃; t4=70℃; t5=85.5℃; <h2 style=";text-align:left;direction:ltr">time<h2 style=";text-align:left;direction:ltr"> 34 <h2 style=";text-align:left;direction:ltr"> =0.6s;t6=-30℃;t7=25℃;t8=85.5℃;t9=-30℃; t 10 =82.5℃;t 11 =70℃。 10. The method according to claim 8, characterized in that If there is no cooling inlet pressure detection fault and cooling outlet pressure detection fault in the fault judgment result, and the short-circuit contactor inside the traction converter is closed or the traction inverter pulse is activated, it is determined that the cooling water pump start request is obtained.

11. The method according to claim 8 or 10, characterized in that: After outputting the cooling water pump start instruction, the method further includes: If the cooling water pump stop condition is met, the cooling water pump start instruction is withdrawn to control the traction converter cooling system to stop starting the cooling water pump; Among them, the cooling water pump stop conditions are: the auxiliary equipment scheduling management no longer releases the cooling water pump, or the cooling water pump start request disappears, or the cooling water pump AC circuit breaker is disconnected, or the AC bus has no AC power supply.

12. The method according to claim 8, characterized in that After outputting the cooling fan high-speed start instruction, the method further includes: If the cooling fan high-speed stop condition is met, the cooling fan high-speed start instruction is withdrawn to control the traction converter cooling system to stop the high-speed start of the cooling fan; The cooling fan high-speed stop conditions include: judging the high-speed contactor closing fault, or judging the low-speed contactor disconnection fault, or the presence of a cooling fan low-speed working signal, or the high-speed start enable disappears for a period of thirty-fifths of time after the cooling fan high-speed start command is output. 35 , or, output a cooling fan low speed start command.

13. The method according to claim 12, characterized in that time 35 =1s。 14. The method according to claim 8, characterized in that After outputting the cooling fan low speed start instruction, the method further includes: If the cooling fan low speed stop condition is met, the cooling fan low speed start instruction is withdrawn to control the traction converter cooling system to stop the low speed start of the cooling fan; Among them, the cooling fan low-speed stop conditions include: judging the low-speed contactor closing fault, or the high-speed contactor closing state, or judging the high-speed contactor disconnection fault, or outputting the cooling fan high-speed start command, or the low-speed start enable and the high-speed start enable disappear after the cooling fan low-speed start command is output, or the low-speed start enable and the high-speed start enable exist at the same time when the train runs at low speed.

15. The method according to claim 8, 12 or 14, characterized in that When the high-speed start signal conditions are met, and there is no high-speed contactor closing fault, and there is no high-speed contactor opening fault, it is determined that high-speed start is enabled; wherein the high-speed start signal conditions include: the presence of a cooling fan low-speed working signal and a low-speed contactor closing fault, or the presence of a cooling fan high-speed working signal.

16. The method according to claim 8 or 14, characterized in that When the low-speed start signal conditions are met, and there is no low-speed contactor closing fault, and there is no low-speed contactor opening fault, it is determined that low-speed start is enabled; wherein the low-speed start signal conditions include: the presence of a cooling fan high-speed working signal and a high-speed contactor closing fault, or the presence of a cooling fan low-speed working signal.

17. The method according to claim 8, 12, 15 or 16, characterized in that If the AC bus outputs AC power, and the auxiliary release converter cooling fan operates at a low speed, and the low-speed start condition is met, it is determined that there is a cooling fan low-speed operation signal; The low-speed start condition includes: obtaining a low-speed start request for the cooling fan, or obtaining a high-speed start request for the cooling fan but the high-speed circuit breaker of the cooling fan is disconnected, or obtaining a high-speed start request for the cooling fan but an IO fault of the circuit breaker is detected.

18. The method according to claim 15 or 16, characterized in that If the AC bus outputs AC power, and the auxiliary release converter cooling fan works at high speed, and a high-speed start request for the cooling fan is obtained, and the IO module of the converter fan circuit breaker is fault-free, and the high-speed AC power supply circuit breaker is closed, it is determined that there is a high-speed working signal for the cooling fan.

19. The method according to claim 17, characterized in that If the low-speed request acquisition condition is met, it is determined that a low-speed start request for the cooling fan is acquired; The low-speed request acquisition condition is one of the following: The cooling circuit temperature is less than the twelfth temperature t 12 , and the train speed is greater than the first speed v1; wherein, when the operating state of the cold water inlet temperature sensor is normal, the cooling circuit temperature = the cold water inlet temperature; when the operating state of the cold water inlet temperature sensor is faulty, the cooling circuit temperature = the cooling circuit temperature is the cold water outlet temperature -7°C; The cooling circuit temperature is greater than t 12 , and the train speed is greater than the second speed v2; The cooling circuit temperature is less than t 12 , and the driver operates the cooling fan at high speed through the human-machine interface HMI; The driver operates the cooling fan at a low speed through the HMI; Receive the train entry air volume reduction signal from CCU, and the water cooling inlet temperature is greater than the thirteenth temperature t 13 ; The CCU does not send a signal to reduce the air volume when the train enters the station, and the water cooling inlet temperature is greater than the fourteenth temperature t 14 ; The CCU does not send a signal to reduce the air volume when the train enters the station, and the filter circuit temperature of the traction converter is greater than the fifteenth temperature t 15 ; The CCU receives the signal that the train enters the station with reduced air volume, and the filter circuit temperature of the traction converter is greater than the sixteenth temperature t 16 .

20. The method according to claim 19, characterized in that The 12 =-10℃, v1=51km / h; v2=1km / h;t 13 =45℃; t 14 =35℃, or, t 14 =60℃; t 15 =105℃; t 16 =90℃.

21. The method according to claim 19, characterized in that After obtaining the cooling fan low speed start request, the method further includes: If the low-speed request cancellation condition is met, it is determined that the cooling fan low-speed start request is not obtained; The low speed request cancellation condition is one of the following: The cooling circuit temperature is less than t 12 The duration of the train speed not exceeding the third speed v3 reaches the thirty-sixth duration time 36 ; The cooling circuit temperature is greater than t 12 , and the duration of the train speed not exceeding the fourth speed v4 reaches the thirty-seventh duration time 37 ; Receive the train entry air volume reduction signal from CCU, and the water cooling inlet temperature is not greater than the seventeenth temperature t 17 ; The CCU does not send a signal to reduce the air volume when the train enters the station, and the water cooling inlet temperature is not greater than the eighteenth temperature t 15 ; The CCU does not send a signal to reduce the air volume when the train enters the station, and the filter circuit temperature of the traction converter is not greater than the nineteenth temperature t 19 ; The CCU receives the signal of reducing the air volume when the train enters the station, and the filter circuit temperature of the traction converter is not greater than the 20th temperature t 20 .

22. The method according to claim 21, characterized in that v3 = 50.5 km / h, time 36 =1.5s; v4=0.5km / h,time 37 =1.5s; t 17 =40℃; if t 14 =35℃, then t 18 =30℃, if t 14 =60℃, then t 18 =50℃; t 19 =95℃; t 20 =80℃.

23. The method according to claim 17 or 18, characterized in that If the high-speed request acquisition condition is met, it is determined that the cooling fan high-speed start request is acquired; The high-speed request acquisition condition is one of the following: The chassis temperature of TCU is greater than the 21st temperature t 21 ; The filter circuit temperature of the traction converter is greater than the 22nd temperature t 22 ; In non-emergency traction mode, the water cooling outlet temperature sensor is operating normally, and the water cooling inlet temperature is greater than the 23rd temperature t 23 ; In non-emergency traction mode, the water cooling outlet temperature sensor is in fault state, and the water cooling inlet temperature is greater than t 23 -Δt1; wherein Δt1 is the first temperature difference; In non-emergency traction mode, the water cooling outlet temperature is greater than the 24th temperature t 24 ; The operating status of the water cooling outlet temperature sensor is faulty; The operating status of the water cooling temperature sensor is faulty; The operating status of the temperature sensor inside the water cooling box is faulty; The operating state of the temperature sensor inside the traction converter is faulty; The operating state of the temperature sensor of the traction converter filter circuit is faulty; The train speed is greater than the fifth speed v5; The cooling circuit temperature is not lower than the 25th temperature t 25 , and the driver operates the cooling fan at high speed through the HMI; The difference between the water cooling inlet temperature and the internal temperature of the water cooling box is greater than the second temperature difference Δt2; The operating state of the internal temperature sensor of the traction converter is normal, and the internal temperature of the traction converter is greater than the twenty-sixth temperature t 26 ; Receive the train entry air volume reduction signal from CCU, and the water cooling inlet temperature is greater than the 27th temperature t 27 ; The CCU receives the signal that the train enters the station with reduced air volume, and the filter circuit temperature of the traction converter is greater than the 28th temperature t 28 .

24. The method according to claim 23, characterized in that The 21 =75℃; t 22 =160℃; t 23 =60℃; Δt1=4℃; t 24 =66℃; v5=65km / h;t 25 =-10℃;Δt2=6℃; t 26 =70℃, or, t 26 =85℃; t 27 =75℃;t 28 =135℃。 25. The method according to claim 24, characterized in that After obtaining the cooling fan high-speed start request, the method further includes: If the high-speed request cancellation condition is met, it is determined that the cooling fan high-speed start request is not obtained; The high-speed request cancellation condition is one of the following: The operating state of the internal temperature sensor of the traction converter is normal, and the internal temperature of the traction converter is not greater than the twenty-ninth temperature t 29 ; Receive the train entry air volume reduction signal from CCU, and the water cooling inlet temperature is not greater than the 30th temperature t 30 ; The CCU receives the signal of reducing the air volume when the train enters the station, and the filter circuit temperature of the traction converter is not greater than 31 degrees Celsius. 31 .

26. The method according to claim 25, characterized in that When t 26 =70℃, t 29 =55℃; t 26 =85℃, t 29 =70℃; t 30 =50℃;t 31 =125℃。 27. An electronic device, characterized in that: include: Memory; processor; as well as Computer programs; The computer program is stored in the memory and is configured to be executed by the processor to implement the method according to any one of claims 1 to 26.

28. A computer-readable storage medium, characterized in that: A computer program is stored thereon; the computer program is executed by a processor to implement the method according to any one of claims 1 to 26.

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