Train operation control methods, devices, electronic equipment, storage media, program products, and trains

Abstract

This disclosure provides a train operation control method, apparatus, electronic device, storage medium, program product, and train, applicable to the field of rail vehicle technology. The train operation control method includes: in response to receiving a first warning signal indicating a first-level short-circuit fault in the traction motor, generating a first control command for controlling the train to run at a first limited speed, wherein the first limited speed is less than the train's normal operating speed; the first warning signal is generated by the traction control unit in response to the detection of a first target current more than or equal to a first-time threshold number during a fault detection cycle; the first target current is a current including a negative-sequence current component greater than or equal to a first current threshold; and sending the first control command to the traction control unit and the braking control unit, so that the traction control unit and the braking control unit adjust their respective output forces to collaboratively control the train to run at the first limited speed.

Description

Technical Field

[0001] This disclosure relates to the field of rail vehicle technology, and more specifically, to a train operation control method, device, electronic equipment, storage medium, program product, and train. Background Technology

[0002] Traction motors are widely used in rail transit systems. For example, traction motors can include permanent magnet motors. Inter-turn short-circuit faults in traction motors can cause them to malfunction, disrupting train operations and potentially even causing fires. Therefore, timely and accurate detection of inter-turn short-circuit faults in traction motors and appropriate emergency response are crucial for improving train operation order and safety.

[0003] However, the accuracy and timeliness of detecting short-turn faults in traction motors are insufficient, affecting the initiative of train operation control. Summary of the Invention

[0004] In view of the above, this disclosure provides a train operation control method, apparatus, electronic device, storage medium, program product, and train.

[0005] The first aspect of this disclosure provides a train operation control method. The method includes: in response to receiving a first warning signal indicating a first-level short-circuit fault in a traction motor, generating a first control command for controlling the train to operate at a first limited speed, wherein the first limited speed is less than the train's normal operating speed, the first warning signal is generated by a traction control unit in response to the detection of a first target current more than or equal to a first-times threshold number of times during a fault detection cycle, the first target current being a current including a negative-sequence current component greater than or equal to a first current threshold; and sending the first control command to a traction control unit and a braking control unit, so that the traction control unit and the braking control unit adjust their respective output forces to collaboratively control the train to operate at the first limited speed.

[0006] According to an embodiment of this disclosure, when controlling the train to run at a first limited speed according to a first control command, the method further includes: in response to receiving a second warning signal indicating a second-level short-circuit fault in the traction motor, generating a second control command for controlling the train to run at a second limited speed, wherein the severity of the second-level short-circuit fault is greater than the severity of the first-level short-circuit fault, the second limited speed is less than the first limited speed, the second warning signal is generated by the traction control unit in response to the number of times a second target current is detected in a fault detection cycle being greater than or equal to a second threshold number, the second target current being a current including a negative-sequence current component greater than or equal to a second current threshold number, the second current threshold number being greater than the first current threshold number; sending the second control command to the traction control unit and the braking control unit so that the traction control unit and the braking control unit adjust their respective output forces to collaboratively control the train to run at the second limited speed.

[0007] According to an embodiment of this disclosure, when controlling the train to run at a first limited speed according to a first control command, the method further includes: in response to receiving a third warning signal indicating a third-level short-circuit fault in the traction motor, generating a third control command for controlling the train to run at a third limited speed, wherein the severity of the third-level short-circuit fault is greater than the severity of the first-level short-circuit fault but less than the severity of the second-level short-circuit fault, the third limited speed is greater than the second limited speed but less than the first limited speed, the third warning signal is generated by the traction control unit in response to the number of times a third target current is detected in a fault detection cycle being greater than or equal to a third threshold, the third target current being a current including a negative-sequence current component greater than the first target current and less than the second current threshold; sending the third control command to the traction control unit and the braking control unit so that the traction control unit and the braking control unit adjust their respective output forces to collaboratively control the train to run at the third limited speed.

[0008] According to an embodiment of the present disclosure, when the train is controlled to run at a first limited speed according to a first control command, the method further includes: in response to not receiving a first warning signal indicating a first-level short-circuit fault in the traction motor, controlling the train to continue running at the first limited speed according to the first control command.

[0009] According to embodiments of this disclosure, when controlling the train to run at a second limited speed according to a second control command, the method further includes: generating a fourth control command for controlling the train to stop running in response to the presence of a temperature greater than or equal to a temperature threshold in the temperatures collected from at least one control-level sensor configured on the traction motor; and sending the fourth control command to the traction control unit and the braking control unit so that the traction control unit and the braking control unit adjust their respective output forces to coordinate the control of the train to stop running.

[0010] According to embodiments of this disclosure, when the train is stopped according to a fourth control command, the method further includes: in response to a temperature from at least one control-level sensor configured on the traction motor, where the temperature is less than a temperature threshold, generating a fifth control command for controlling the train to run at a fourth limited speed, wherein the fourth limited speed is less than a second limited speed; sending the fifth control command to the traction control unit and the braking control unit so that the traction control unit and the braking control unit adjust their respective output forces to coordinately control the train to run at the fourth limited speed.

[0011] According to embodiments of this disclosure, when controlling the train to run at a second limited speed according to a second control command, the method further includes: in response to receiving a fourth warning signal indicating a fourth-level short-circuit fault in the traction motor, generating a sixth control command for controlling the train to run at a fifth limited speed, wherein the severity of the fourth-level short-circuit fault is greater than the severity of the second-level short-circuit fault, the fifth limited speed is less than the second limited speed, the fourth warning signal is generated by the traction control unit in response to the detection of a fourth target current more than or equal to a fourth number threshold during a fault detection cycle, the fourth target current being a current including a negative-sequence current component greater than the second target current; sending the sixth control command to the traction control unit and the braking control unit so that the traction control unit and the braking control unit adjust their respective output forces to collaboratively control the train to run at the fifth limited speed.

[0012] According to an embodiment of this disclosure, when the train is controlled to run at a second limited speed according to a second control command, the method further includes: in response to not receiving a second warning signal indicating a second-level short-circuit fault in the traction motor, controlling the train to continue running at the second limited speed according to the second control command.

[0013] A second aspect of this disclosure provides a train operation control device. The device includes:

[0014] The generation module, in response to receiving a first warning signal indicating a first-level short-circuit fault in the traction motor, generates a first control command to control the train to run at a first limited speed, wherein the first limited speed is less than the train's normal operating speed. The first warning signal is generated by the traction control unit in response to the number of times a first target current is detected during a fault detection cycle being greater than or equal to a first threshold number. The first target current is a current including a negative-sequence current component greater than or equal to a first current threshold. The control module sends the first control command to the traction control unit and the braking control unit, so that the traction control unit and the braking control unit adjust their respective output forces to coordinately control the train to run at the first limited speed.

[0015] A third aspect of this disclosure provides an electronic device, including: one or more processors; and a memory for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors cause the one or more processors to implement the method described above.

[0016] A fourth aspect of this disclosure provides a computer-readable storage medium having executable instructions stored thereon, which, when executed by a processor, cause the processor to perform the method described above.

[0017] A fifth aspect of this disclosure provides a computer program product including a computer program that, when executed by a processor, implements the method described above.

[0018] A sixth aspect of this disclosure provides a train. The train includes a braking control unit, a traction control unit, and a train control unit. The traction control unit is configured to generate a first warning signal indicating a first-level short-circuit fault in the traction motor in response to a fault detection cycle detecting a first target current more than or equal to a first threshold number of times, wherein the first target current is a current including a negative-sequence current component greater than or equal to a first current threshold. The train control unit is configured to: receive the first warning signal; generate a first control command for controlling the train to operate at a first limited speed, wherein the first limited speed is less than the train's normal operating speed; and send the first control command to the traction control unit and the braking control unit. The traction control unit and the braking control unit are configured to adjust their respective output forces according to the first control command to collaboratively control the train to operate at the first limited speed.

[0019] According to embodiments of this disclosure, the traction control unit is further configured to control the power switching devices of the traction converter to perform a three-phase short-circuit operation in response to the number of times a first target current is detected during a fault detection cycle being greater than or equal to a first threshold number.

[0020] According to embodiments of this disclosure, if the number of times the negative sequence current component collected by the traction control unit exceeds the first current threshold is greater than or equal to the first threshold, an early warning signal indicating that the traction motor has experienced a first-level short circuit fault can be generated in a timely manner, improving the timeliness of the early warning of short circuit faults. Based on the early warning signal, the traction control unit and the braking control unit are coordinated to take speed-limiting measures on the current train, reducing the risk of further expansion of the short circuit fault and the possibility of causing a fire. Attached Figure Description

[0021] The above and other objects, features and advantages of this disclosure will become clearer from the following description of embodiments with reference to the accompanying drawings, in which:

[0022] Figure 1An exemplary system architecture to which the train operation control method of this disclosure can be applied is illustrated schematically;

[0023] Figure 2 The schematic diagram illustrates the electrical schematic of the traction control unit and the traction motor according to an embodiment of the present disclosure;

[0024] Figure 3 A flowchart illustrating a train operation control method according to an embodiment of the present disclosure is shown schematically.

[0025] Figure 4 A schematic diagram illustrating the structure of a train operation control device according to an embodiment of the present disclosure is shown.

[0026] Figure 5 A block diagram of an electronic device suitable for implementing a train operation control method according to an embodiment of the present disclosure is shown schematically. Detailed Implementation

[0027] The embodiments of the present disclosure will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the disclosure. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the embodiments of the present disclosure for ease of explanation. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts of the present disclosure.

[0028] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0029] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0030] When using expressions such as "at least one of A, B and C", they should generally be interpreted in accordance with the meaning that is commonly understood by those skilled in the art (e.g., "a system having at least one of A, B and C" should include, but is not limited to, a system having A alone, a system having B alone, a system having C alone, a system having A and B, a system having A and C, a system having B and C, and / or a system having A, B and C, etc.).

[0031] Traction motors, such as permanent magnet motors, have advantages such as high power density and high energy efficiency, and are widely used in rail transit systems. However, in the stator windings of permanent magnet electrodes, electrical connections can occur between adjacent turns that should be insulated from each other due to insulation damage or other reasons. This creates inter-turn short circuits, resulting in adverse effects such as increased current, localized overheating, uneven magnetic field distribution, and decreased performance of the permanent magnet motor.

[0032] (1) Increased current: A short circuit between turns of the traction motor will cause a circulating current to form in the short-circuited turns, resulting in an increase in the current in the stator winding. If the current in the stator winding exceeds its rated current, it will cause the traction motor to generate additional heat.

[0033] (2) Local overheating: The increased current in the stator winding of the traction motor when a short circuit occurs will generate additional heat, causing local overheating inside the traction motor. This will accelerate the aging of the insulation layer between the wire turns at the overheated location, and in severe cases, it may even cause the stator winding to burn out.

[0034] (3) Uneven magnetic field distribution: Some turns of the stator winding in the traction motor have inter-turn short circuit faults, which reduces the uniformity of the distributed magnetic field formed by the traction motor, thereby causing the torque of the traction motor to deviate and thus reducing its own operating performance.

[0035] (4) Degradation of motor performance: Inter-turn short circuit of traction motor will reduce the output power of traction motor, reduce operating efficiency, and worsen power factor. In severe cases, it may cause traction motor to fail to operate normally, affecting train operation order and even causing fire.

[0036] Traction motor short-turn fault detection methods may include:

[0037] (1) Induction method: Using the principle of electromagnetic induction, a short circuit detector is placed across the slot of the stator winding of the traction motor. By detecting whether the iron piece on the slot of the short circuit detector vibrates, it can be determined whether there is a short circuit fault in the traction motor.

[0038] (2) Observation method: By observing whether the insulation layer of the stator winding coil end and the wire slot is damaged, burnt, or has an odor, it can be determined whether the traction motor has a short circuit fault.

[0039] (3) Multimeter or megohmmeter test method: Use a multimeter or megohmmeter to test the insulation resistance between any two phase stator windings of the traction motor. If the insulation resistance is extremely small or even zero, the traction motor may have an inter-turn short circuit fault.

[0040] (4) Temperature detection method: Under the condition that the traction motor runs unloaded for a predetermined period of time, check whether the temperature of each part of the stator winding exceeds the normal temperature. If the temperature of the stator winding exceeds the normal temperature, it indicates that the traction motor may have an inter-turn short circuit fault.

[0041] (5) Power-on test method: Use an ammeter to test the current in the stator winding. If the current in the stator winding exceeds the normal current value, it indicates that the traction motor may have an inter-turn short circuit fault.

[0042] However, the above detection methods lack accuracy and timeliness in detecting short-turn faults in traction motors, which affects the initiative of train operation control.

[0043] When a traction motor experiences an inter-turn short-circuit fault, the resistance of the three-phase stator windings is unbalanced due to the internal stator winding short circuit. This asymmetrical operation of the traction motor leads to asymmetrical inverter output current. Therefore, the traction motor's output current contains not only positive-sequence current components but also negative-sequence and / or zero-sequence current components. The corresponding characteristics of the negative-sequence current component of the inter-turn short-circuit fault can be extracted from the inverter output current collected by the traction control unit. Based on the diagnostic principle that a negative-sequence current component is generated during an inter-turn short-circuit fault in the traction motor, timely early warning of inter-turn short-circuit faults in the traction motor can be achieved.

[0044] In view of this, the present disclosure provides a train operation control method, device, electronic equipment, storage medium, program product, and train. This method, to a certain extent, solves the problems of rapid fault propagation leading to operational disruptions and train fires caused by the inability to promptly and accurately determine traction motor short-turn faults. It can improve the timeliness and accuracy of traction motor short-turn fault diagnosis, guide train emergency response, and ensure operational order and safety.

[0045] Figure 1 An exemplary system architecture to which the train operation control method of this disclosure can be applied is illustrated schematically. It should be noted that... Figure 1 The examples shown are merely examples of system architectures that can be applied to the embodiments of this disclosure, in order to help those skilled in the art understand the technical content of this disclosure, but do not mean that the embodiments of this disclosure cannot be used in other devices, systems, environments or scenarios.

[0046] like Figure 1 As shown, the system architecture 100 according to this embodiment may include a host computer display unit 101, a train control unit 102, a traction control unit 103, a braking control unit 104, and a data acquisition unit 105.

[0047] The host computer display unit 101 is configured to display real-time train operation information and fault information. Operation information may include at least one of the following: train speed, target position, direction of travel, distance traveled, and travel duration. Fault information may include traction motor short-circuit faults or other fault information. The host computer display unit 101 can also function as an interactive page. Train drivers and conductors can input control commands for the train through the host computer display unit 101, such as at least one of the following commands: traction command, braking command, etc.

[0048] The train control unit 102, as the control center of the train, is configured to receive control commands and send them to execution units, such as at least one of the execution units including the traction control unit 103 and the braking control unit 104. The train control unit 102 is also configured to receive operating status information from the execution units and data collected by the acquisition unit 105, and to report the operating status information and collected data to the host computer display unit 101, so that the driver and conductor can input control commands for the train based on the operating status information of the execution units and the collected data from the acquisition unit 105.

[0049] Figure 2 An electrical schematic diagram of a traction control unit and a traction motor according to an embodiment of the present disclosure is shown.

[0050] like Figure 2 As shown, LH1~LH13 represent current transformers, VH1~VH6 represent voltage transformers, KM1~KM4 represent contactors, IM11~IM14 represent traction motors, Q11~Q43 represent circuit breakers, R1~R6 represent resistors, and Cd1~Cd6 represent capacitors. The traction control unit can rectify, invert, and chop the electrical energy in the power grid to provide three-phase AC power to the stator windings of the traction motor.

[0051] The traction control unit 103 is configured to execute the train's traction commands and drive the traction motor. The traction motor, such as the permanent magnet motor in this embodiment, may include a stator and a rotor. Control-level sensors are mounted on the traction motor. These control-level sensors may include at least one of the following: a transmission end bearing sensor and a non-transmission end bearing sensor. The traction control unit 103 can also collect the traction motor's status information, such as current and voltage information, through the traction converter. The current information can be inverter output current information, including positive-sequence current components, negative-sequence current components, or zero-sequence current components, and the traction motor's status information is sent to the train control unit 102.

[0052] The braking control unit 104 is configured to execute the braking command of the train and, in conjunction with the traction command of the traction control unit 103 issued by the train control unit 102, control the train's running speed.

[0053] The acquisition unit 105 is configured to acquire temperature data collected by the control-level sensors on the traction motor in real time and send the temperature data to the train control unit 102, so that the train control unit 102 can send an alarm to the host computer display unit 101 based on the threshold temperature set on each sensor.

[0054] It should be understood that Figure 1 and Figure 2 The number of systems, units, and devices shown is merely illustrative. The number of systems, units, and devices can be increased or decreased according to the actual application scenario.

[0055] Figure 3 A flowchart illustrating a train operation control method according to an embodiment of the present disclosure is shown schematically.

[0056] like Figure 3 As shown, the method 300 may include operations S310~S320.

[0057] In operation S310, in response to receiving a first warning signal indicating a first-level short-circuit fault in the traction motor, a first control command is generated to control the train to run at a first-limit speed.

[0058] In this embodiment, the train can be a train traveling at a normal operating speed, for example, a normal operating speed of 300 km / h. The first speed limit is less than the train's normal operating speed. The first speed limit could be 200 km / h, etc. The first control command instructs the train to operate at the first speed limit, which is lower than the normal operating speed.

[0059] The traction motor may include a permanent magnet motor. When an inter-turn short-circuit fault occurs in the traction motor, the traction control unit can detect the negative sequence current component in the inverter output current. The traction control unit may include a traction converter. The negative sequence current component is the current component in the traction motor output current whose phase sequence is opposite to the positive sequence current; it is a characteristic current component during three-phase asymmetrical operation. The first target current can be a current of the negative sequence current component that is greater than or equal to a first current threshold. The first current threshold can be 5A, etc.

[0060] The first warning signal is generated by the traction control unit when the number of times the first target current is detected within the fault detection cycle is greater than or equal to the first count threshold. The fault detection cycle can be the train running period after the traction control unit collects the negative sequence current component. The first warning signal indicates that a first-level short-circuit fault has occurred in the traction motor. The first count threshold can be set to 2 times, etc.

[0061] For example, when a short-circuit fault occurs in the traction motor, the traction control unit can collect the negative sequence current component, i.e., the first target current, from the inverter output current of the traction motor. For instance, when the collected first target current is greater than or equal to 5A, such as 6A, the train control unit receives a first warning signal indicating a first-level short-circuit fault in the traction motor and uploads the first warning signal to the host computer display unit. The driver and conductor can then input a first control command to the train control unit based on the warning signal.

[0062] When operating S320, a first control command is sent to the traction control unit and the braking control unit so that the traction control unit and the braking control unit adjust their respective output forces and coordinate to control the train to run at the first limit speed.

[0063] The traction control unit is configured to execute the train's traction commands and drive the traction motor. The braking control unit is configured to execute the train's braking commands and, in coordination with the train control unit, control the train's speed based on the traction commands from the traction control unit.

[0064] For example, the train control unit controls the train to disconnect traction and apply braking to reduce speed based on a first control command, and the train travels at a first speed limit. For instance, if the train's normal operating speed is 300 km / h, after receiving a warning signal of a traction motor short circuit fault, the train control unit controls the train to reduce speed urgently according to the first control command, and the train will run at a speed of 200 km / h.

[0065] According to embodiments of this disclosure, if the number of times the negative sequence current component collected by the traction control unit exceeds the first current threshold is greater than or equal to the first threshold, an early warning signal indicating that the traction motor has experienced a first-level short circuit fault can be generated in a timely manner, improving the timeliness of the early warning of short circuit faults. Based on the early warning signal, the traction control unit and the braking control unit are coordinated to take speed-limiting measures on the current train, reducing the risk of further expansion of the short circuit fault and the possibility of causing a fire.

[0066] In a specific embodiment, when the train is controlled to run at a first limited speed according to the first control command, when the train control unit receives a second warning signal indicating that a second-level short circuit fault has occurred in the traction motor, it can generate a second control command to control the train to run at a second limited speed.

[0067] In a specific embodiment, a second control command can be sent to the traction control unit and the braking control unit so that the traction control unit and the braking control unit can adjust their respective output forces and coordinate to control the train to run at the second limit speed.

[0068] The second control command instructs the train to operate at a second speed limit when a second-level short-circuit fault occurs in the traction motor. The severity of the second-level short-circuit fault can be greater than that of the first-level short-circuit fault. The second speed limit can be less than the first speed limit. The second speed limit can be 40 km / h, etc.

[0069] The second target current can be a negative-sequence current component that is greater than or equal to a second current threshold, and the second current threshold can be greater than the first current threshold. The second current threshold can be 8A, etc.

[0070] The second warning signal is generated when the traction control unit detects the second target current more than or equal to a second threshold number within the fault detection cycle. The second warning signal indicates that the traction motor has experienced a second-level short-circuit fault. The second threshold number can be set to be the same as or different from the first threshold number, depending on the specific application requirements; this disclosure does not impose any limitations on this setting. For example, the second threshold number can be set to 2 times, etc.

[0071] For example, when the train is running at the first speed limit, if the second target current collected by the traction control unit is greater than or equal to 8A (e.g., 9A), the train control unit receives a second warning signal indicating a second-level short-circuit fault in the traction motor. This warning signal is then uploaded to the host computer display unit. The driver and conductor can input a second control command to the train control unit based on the warning signal. The train control unit then controls the train to continue slowing down to 40 km / h and proceed to the target location based on the second control command. For instance, the train can be controlled to run at the second speed limit to the nearest station to clear passengers and return to the depot for further fault determination.

[0072] According to embodiments of this disclosure, after the traction motor decelerates to a first speed limit based on a first warning message, the traction control unit continues to collect the negative sequence current component in the traction motor to further determine if an inter-turn short circuit fault has occurred. If the negative sequence current component is greater than or equal to a second current threshold, the train is controlled to decelerate and operate at the second speed limit. This method can further determine the accuracy of the warning signal after the train has taken speed-limiting measures, reducing the risk of disrupting the normal operation of the train due to misjudgment, alleviating the burden of emergency response on the driver and passengers, improving the timeliness of emergency response, and improving both the order of train operation and the safety of train operation.

[0073] In a specific embodiment, when the train is controlled to run at a first limited speed according to the first control command, when the train control unit receives a third warning signal indicating that a third-level short circuit fault has occurred in the traction motor, it can generate a third control command to control the train to run at a third limited speed.

[0074] In a specific embodiment, a third control command can be sent to the traction control unit and the braking control unit so that the traction control unit and the braking control unit can adjust their respective output forces and coordinate to control the train to run at the third limit speed.

[0075] The third control command instructs the train to operate at a third speed limit when a third-level short-circuit fault occurs in the traction motor. The severity of a third-level short-circuit fault can be greater than that of a first-level short-circuit fault but less than that of a second-level short-circuit fault. The third speed limit is greater than the second speed limit but less than the first speed limit. For example, the third speed limit could be 80 km / h.

[0076] The third target current can be a negative sequence current component that is greater than the first target current and less than the second current threshold.

[0077] The third warning signal is generated by the traction control unit in response to the number of times the third target current is detected within the fault detection cycle being greater than or equal to the third number threshold.

[0078] The third warning signal indicates that a third-level short-circuit fault has occurred in the traction motor. The third number threshold can be set to be the same as or different from the first and / or second number thresholds, depending on the specific application requirements, and this disclosure does not limit it. For example, the third number threshold can be set to 2 times, etc.

[0079] For example, when the train is running at the first limited speed, if the third target current collected by the traction control unit is greater than the first target current but less than the second current threshold (e.g., 7A), the train control unit receives a third warning signal indicating a third-level short-circuit fault in the traction motor. This third warning signal is then uploaded to the host computer display unit. The driver and conductor can input a third control command to the train control unit based on the third warning signal. The train control unit then controls the train to continue reducing its speed to 80 km / h based on the third control command.

[0080] According to embodiments of this disclosure, after the traction motor slows down to the first limit speed based on the first warning information, a multi-level speed limit handling strategy is set based on the magnitude of the negative sequence current component in the traction motor. This ensures the order of train operation, reduces the risk of further fault expansion, and reduces the possibility of fire.

[0081] In a specific embodiment, when the train is controlled to run at a first limited speed according to the first control command, if the train control unit does not receive a first warning signal indicating a first-level short circuit fault in the traction motor, it can control the train to continue running at the first limited speed according to the first control command.

[0082] While the train is running at the first speed limit, the traction control unit continues to collect the negative sequence current component from the traction motor. When the collected negative sequence current component is less than the first current threshold, the train control unit will not receive the first warning signal and will control the train to continue running at the first speed limit.

[0083] For example, if the negative sequence current component collected by the traction control unit is less than the first current threshold, such as 2A, while the train is running at the first limited speed, the train control unit controls the train to continue running at 200 km / h.

[0084] According to the embodiments of this disclosure, when the train is controlled to run at a first limited speed according to the first control command, if the negative sequence current component collected by the traction control unit matches the collected value during the actual operation of the train, the train is still controlled to run at the first limited speed. This can improve the accuracy of determining short circuit faults, and reduce train operation losses while ensuring train safety.

[0085] In a specific embodiment, when the train is controlled to run at a second limited speed according to the second control command, if the temperature collected by at least one control-level sensor of the traction motor is greater than or equal to a temperature threshold, a fourth control command for controlling the train to stop running can be generated.

[0086] In a specific embodiment, a fourth control command can be sent to the traction control unit and the braking control unit so that the traction control unit and the braking control unit can adjust their respective output forces and coordinate to control the train to stop running.

[0087] Control-level sensors are used to collect the temperature of the traction motor in real time, and may include at least one of the following: drive-end bearing sensors, non-drive-end bearing sensors, etc.

[0088] The fourth control command indicates the instruction to stop the train from running.

[0089] The control-level sensors on the traction motor can be installed at different locations inside the permanent magnet motor. Each control-level sensor has its own temperature threshold, which can be set to 80℃~150℃, such as 80℃, 100℃, 120℃, 140℃, 150℃, etc. The temperature threshold of each control-level sensor can be set according to the actual application scenario requirements, and this disclosure does not impose specific limitations.

[0090] For example, while the train is running at the second limited speed, if the temperature collected by at least one control-level sensor is greater than or equal to a temperature threshold, the train is controlled to stop running.

[0091] According to embodiments of this disclosure, when the train is controlled to run at a second limited speed according to a second control command, in order to further determine the inter-turn short-circuit fault, the driver and passengers can continue to be assisted in driving based on the temperature collected by the control-level sensors. When the temperature collected by at least one control-level sensor of the traction motor exceeds a temperature threshold, the train is controlled to stop running. This method can improve the safety of train operation, prevent further spread of the fault, and reduce the risk of fire.

[0092] In a specific embodiment, when the train is stopped according to the fourth control command, if the temperature collected by at least one control-level sensor of the traction motor is lower than the temperature threshold, a fifth control command can be generated to control the train to run at the fourth limited speed.

[0093] In a specific embodiment, a fifth control command can be sent to the traction control unit and the braking control unit so that the traction control unit and the braking control unit can adjust their respective output forces and coordinate to control the train to run at the fourth speed limit.

[0094] The fifth control command instructs the train to operate at the fourth speed limit. The fourth speed limit can be lower than the second speed limit; for example, the fourth speed limit can be set to 10 km / h.

[0095] When the train is suspended according to the fourth control command, if the temperature collected by each control level sensor of the traction motor is lower than the temperature threshold, the train is controlled to run at the fourth limited speed and proceed to the target location. For example, the train can be controlled to run at the fourth limited speed to the nearest station to clear passengers and return to the depot for further fault determination.

[0096] For example, when the train is suspended according to the fourth control command, if the temperature collected by each control level sensor of the traction motor is less than the temperature threshold, the train is controlled to maintain operation at a speed of 10 km / h until the nearest station is cleared of passengers, and then returns to the depot for further fault determination.

[0097] According to embodiments of this disclosure, when a train stops due to a temperature exceeding a temperature threshold as measured by a controller sensor, the train is controlled to maintain operation at a fourth restricted speed until the temperature of the traction motor returns to within the temperature threshold, thereby reducing the further spread of the fault and improving the safety of train operation.

[0098] In a specific embodiment, when the train is controlled to run at the second limited speed according to the second control command, the train control unit receives a fourth warning signal indicating that the traction motor has a fourth-level short circuit fault, and can generate a sixth control command to control the train to run at the fifth limited speed.

[0099] In a specific embodiment, a sixth control command can be sent to the traction control unit and the braking control unit so that the traction control unit and the braking control unit can adjust their respective output forces and coordinate to control the train to run at the fifth speed limit.

[0100] The sixth control command instructs the train to operate at the fifth speed limit when a fourth-level short-circuit fault occurs in the traction motor. The severity of a fourth-level short-circuit fault can be greater than that of a second-level short-circuit fault. The fifth speed limit can be lower than the second speed limit, and can be the same as or different from the fourth speed limit, depending on actual needs; this disclosure does not impose any limitations on this setting. For example, the fifth speed limit could be 10 km / h.

[0101] The fourth target current can be a current with a negative sequence current component that is greater than the second target current.

[0102] The fourth warning signal is generated by the traction control unit when the number of times it detects the fourth target current within the fault detection cycle is greater than or equal to the fourth threshold. The fourth warning signal indicates that the traction motor has experienced a fourth-level short-circuit fault. The fourth threshold can be set to be the same as or different from the second threshold, depending on the specific application requirements; this disclosure does not impose any limitations on this setting. For example, the fourth threshold can be set to 2 times, etc.

[0103] For example, when the train is running at the second speed limit, if the negative sequence current component collected by the traction control unit is greater than the second target current, such as 10A, the train control unit receives a fourth warning signal indicating a fourth-level short-circuit fault in the traction motor. This fourth warning signal is then uploaded to the host computer display unit, allowing the driver and conductor to input a fourth control command to the train control unit based on the fourth warning signal. The train control unit then controls the train to continue reducing its speed to 10 km / h based on the second control command.

[0104] According to embodiments of this disclosure, after the traction motor slows down to the second limit speed based on the second warning information, a multi-level speed limit handling strategy is set based on the magnitude of the negative sequence current component in the traction motor. This ensures the order of train operation, reduces the risk of further fault expansion, and reduces the possibility of causing a fire.

[0105] In a specific embodiment, when the train is controlled to run at the second limited speed according to the second control command, if the train control unit does not receive the second warning signal indicating that the traction motor has a second-level short circuit fault, the train continues to run at the second limited speed according to the second control command.

[0106] While the train is running at the second speed limit, the traction control unit continues to collect the negative sequence current component from the traction motor. When the collected negative sequence current component is less than the second current threshold, the train control unit will not receive the second warning signal and will control the train to continue running at the second speed limit.

[0107] For example, if the negative sequence current component collected by the traction control unit is less than the second current threshold while the train is running at the second limited speed, the train control unit controls the train to continue running at 40 km / h.

[0108] According to embodiments of this disclosure, when the train is controlled to run at a second limited speed according to a second control command, if the negative sequence current component collected by the traction control unit matches the collected value during the actual operation of the train, the train is still controlled to run at the second limited speed. This can improve the accuracy of determining short-circuit faults, ensuring train safety while reducing losses in train operation.

[0109] Continue to refer to Figure 1 and Figure 2 This disclosure also provides a train that may include a braking control unit, a traction control unit, and a train control unit.

[0110] The traction control unit is configured to generate a first warning signal indicating a first-level short-circuit fault in the traction motor in response to the detection of a first target current more than or equal to a first threshold number during a fault detection cycle. The first target current is a current that may include a negative-sequence current component greater than or equal to a first current threshold.

[0111] The train control unit is configured to: receive a first warning signal; generate a first control command to control the train to run at a first speed limit; and send the first control command to the traction control unit and the braking control unit. The first speed limit may be less than the train's normal operating speed.

[0112] The traction control unit and the braking control unit can be configured to adjust their respective output forces according to the first control command, and coordinate to control the train to run at the first limited speed.

[0113] In a specific embodiment, the traction control unit can also be configured to control the power switching devices of the traction converter to perform a three-phase short-circuit operation in response to the number of times the first target current is detected in the fault detection cycle being greater than or equal to the first threshold.

[0114] Based on the above-described train operation control method, this disclosure also provides a train operation control device. The following will be combined with... Figure 4 The device is described in detail.

[0115] Figure 4 A schematic block diagram of a train operation control device according to an embodiment of the present disclosure is shown.

[0116] like Figure 4 As shown, the train operation control device 400 may include a generation module 410 and a control module 420.

[0117] The generation module 410 is configured to generate a first control command for controlling the train to run at a first limited speed in response to receiving a first warning signal indicating a first-level short-circuit fault in the traction motor. The first limited speed is less than the train's normal operating speed. The first warning signal is generated by the traction control unit in response to the detection of a first target current more than or equal to a first-time threshold number during a fault detection cycle. The first target current is a current including a negative-sequence current component greater than or equal to a first current threshold. In one embodiment, the generation module 410 may be used to perform the operation S210 described above, which will not be repeated here.

[0118] The control module 420 is used to send first control commands to the traction control unit and the braking control unit, so that the traction control unit and the braking control unit adjust their respective output forces and coordinate to control the train to run at a first limited speed. In one embodiment, the control module 420 can be used to perform the operation S220 described above, which will not be repeated here.

[0119] When the train is controlled to run at a first limited speed according to the first control command, the control module 420 may include a first generation submodule and a first control submodule.

[0120] The first generation submodule is used to generate a second control command for controlling the train to run at a second limited speed in response to receiving a second warning signal indicating that a second-level short circuit fault has occurred in the traction motor. The severity of the second-level short circuit fault is greater than that of the first-level short circuit fault, and the second limited speed is less than the first limited speed. The second warning signal is generated by the traction control unit in response to the number of times a second target current is detected in the fault detection cycle being greater than or equal to a second threshold number. The second target current is a current that includes a negative sequence current component that is greater than or equal to a second current threshold number, and the second current threshold number is greater than the first current threshold number.

[0121] The first control submodule is used to send second control commands to the traction control unit and the braking control unit so that the traction control unit and the braking control unit can adjust their respective output forces and coordinate to control the train to run at the second speed limit.

[0122] When the train is controlled to run at a first limited speed according to the first control command, the control module 420 may include a second generation submodule and a second control submodule.

[0123] The second generation submodule is used to generate a third control command for controlling the train to run at a third limited speed in response to receiving a third warning signal indicating that a third-level short-circuit fault has occurred in the traction motor. The severity of the third-level short-circuit fault is greater than that of the first-level short-circuit fault but less than that of the second-level short-circuit fault. The third limited speed is greater than that of the second limited speed but less than that of the first limited speed. The third warning signal is generated by the traction control unit in response to the number of times the third target current is detected in the fault detection cycle being greater than or equal to the third threshold. The third target current is a current that includes a negative sequence current component that is greater than that of the first target current but less than that of the second current threshold.

[0124] The second control submodule is used to send third control commands to the traction control unit and the braking control unit so that the traction control unit and the braking control unit can adjust their respective output forces and coordinate to control the train to run at the third speed limit.

[0125] When the train is controlled to run at a first limited speed according to the first control command, the control module 420 may include a third control submodule.

[0126] The third control submodule is used to respond to the absence of a first warning signal indicating a first-level short-circuit fault in the traction motor, and to control the train to continue running at a first-limit speed according to a first control command.

[0127] When the train is controlled to run at the second speed limit according to the second control command, the first control submodule may include the fourth generation submodule and the fourth control submodule.

[0128] The first generation subunit is used to generate a fourth control command for controlling the train to stop running in response to the presence of a temperature greater than or equal to a temperature threshold in the temperatures collected from at least one control-level sensor configured on the traction motor.

[0129] The second control subunit is used to send a fourth control command to the traction control unit and the braking control unit so that the traction control unit and the braking control unit can adjust their respective output forces and coordinate to control the train to stop running.

[0130] When the train is suspended according to the fourth control command, the fourth control submodule may include a first generation subunit and a first control subunit.

[0131] The first generation subunit is configured to generate a fifth control command for controlling the train to run at a fourth limited speed in response to a temperature collected by at least one control-level sensor configured on the traction motor, each of which has a temperature below a temperature threshold. The fourth limited speed is less than the second limited speed.

[0132] The first control subunit is used to send the fifth control command to the traction control unit and the braking control unit so that the traction control unit and the braking control unit can adjust their respective output forces and coordinate to control the train to run at the fourth speed limit.

[0133] When the train is controlled to run at a second speed limit according to the second control command, the first control submodule may include a second generation subunit and a second control subunit.

[0134] The second generation subunit is used to generate a sixth control command for controlling the train to run at a fifth speed limit in response to receiving a fourth warning signal indicating that a fourth-level short-circuit fault has occurred in the traction motor. The severity of the fourth-level short-circuit fault is greater than that of the second-level short-circuit fault, and the fifth speed limit is less than the second speed limit. The fourth warning signal is generated by the traction control unit in response to the detection of a fourth target current more than or equal to a fourth threshold number of times during the fault detection cycle. The fourth target current is a current that includes a negative-sequence current component greater than the second target current.

[0135] The second control subunit is used to send the sixth control command to the traction control unit and the braking control unit so that the traction control unit and the braking control unit can adjust their respective output forces and coordinate to control the train to run at the fifth speed limit.

[0136] When the train is controlled to run at a second speed limit according to the second control command, the first control submodule may include a third control subunit.

[0137] The third control subunit is used to respond to the absence of a second warning signal indicating a second-level short-circuit fault in the traction motor, and to control the train to continue running at the second speed limit according to the second control command.

[0138] According to embodiments of this application, any plurality of modules in the generation module 410 and the control module 420 may be combined into one module, or any one of these modules may be split into multiple modules. Alternatively, at least a portion of the functionality of one or more of these modules may be combined with at least a portion of the functionality of other modules and implemented in one module. According to embodiments of this application, at least one of the generation module 410 and the control module 420 may be at least partially implemented as hardware circuitry, such as a field-programmable gate array (FPGA), a programmable logic array (PLA), a system-on-a-chip, a system-on-a-substrate, a system-on-package, an application-specific integrated circuit (ASIC), or any other reasonable means of integrating or packaging circuitry, or implemented in software, hardware, or firmware, or in any appropriate combination of any of these three implementation methods. Alternatively, at least one of the generation module 410 and the control module 420 may be at least partially implemented as a computer program module, which, when run, can perform corresponding functions.

[0139] Figure 5 A block diagram of an electronic device suitable for implementing a train operation control method according to an embodiment of the present disclosure is shown schematically. Figure 5 The electronic device shown is merely an example and should not be construed as limiting the functionality and scope of the embodiments disclosed herein.

[0140] like Figure 5 As shown, an electronic device 500 according to an embodiment of the present disclosure includes a processor 501, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 502 or a program loaded from a storage portion 508 into a random access memory (RAM) 503. The processor 501 may include, for example, a general-purpose microprocessor (e.g., a CPU), an instruction set processor and / or an associated chipset and / or a special-purpose microprocessor (e.g., an application-specific integrated circuit (ASIC)). The processor 501 may also include onboard memory for caching purposes. The processor 501 may include a single processing unit or multiple processing units for performing different actions of the method flow according to an embodiment of the present disclosure.

[0141] RAM 503 stores various programs and data required for the operation of electronic device 500. Processor 501, ROM 502, and RAM 503 are interconnected via bus 504. Processor 501 performs various operations of the method flow according to embodiments of the present disclosure by executing programs in ROM 502 and / or RAM 503. It should be noted that the programs may also be stored in one or more memories other than ROM 502 and RAM 503. Processor 501 may also perform various operations of the method flow according to embodiments of the present disclosure by executing programs stored in said one or more memories.

[0142] According to embodiments of this disclosure, the electronic device 500 may further include an input / output (I / O) interface 505, which is also connected to a bus 504. The electronic device 500 may also include one or more of the following components connected to the input / output (I / O) interface 505: an input section 506 including a keyboard, mouse, etc.; an output section 507 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and a speaker, etc.; a storage section 508 including a hard disk, etc.; and a communication section 509 including a network interface card such as a LAN card, modem, etc. The communication section 509 performs communication processing via a network such as the Internet. A drive 510 is also connected to the input / output (I / O) interface 505 as needed. A removable medium 511, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., is installed on the drive 510 as needed so that computer programs read from it can be installed into the storage section 508 as needed.

[0143] According to embodiments of this disclosure, the method flow according to embodiments of this disclosure can be implemented as a computer software program. For example, embodiments of this disclosure include a computer program product comprising a computer program carried on a computer-readable storage medium, the computer program containing program code for performing the methods shown in the flowchart. In such embodiments, the computer program can be downloaded and installed from a network via communication section 509, and / or installed from removable medium 511. When the computer program is executed by processor 501, it performs the functions defined in the system of embodiments of this disclosure. According to embodiments of this disclosure, the systems, devices, apparatuses, modules, units, etc., described above can be implemented by computer program modules.

[0144] This disclosure also provides a computer-readable storage medium, which may be included in the device / apparatus / system described in the above embodiments; or it may exist independently and not assembled into the device / apparatus / system. The computer-readable storage medium carries one or more programs that, when executed, implement the method according to the embodiments of this disclosure.

[0145] According to embodiments of this disclosure, the computer-readable storage medium can be a non-volatile computer-readable storage medium. Examples include, but are not limited to: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this disclosure, the computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0146] For example, according to embodiments of this disclosure, a computer-readable storage medium may include the ROM 502 and / or RAM 503 described above and / or one or more memories other than ROM 502 and RAM 503.

[0147] Embodiments of this disclosure also include a computer program product comprising a computer program containing program code for performing the methods provided in the embodiments of this disclosure. When the computer program product is run on an electronic device, the program code is used to enable the electronic device to implement the train operation control method provided in the embodiments of this disclosure.

[0148] When the computer program is executed by the processor 501, it performs the functions defined in the system / apparatus of this disclosure embodiments. According to embodiments of this disclosure, the systems, apparatuses, modules, units, etc., described above can be implemented by computer program modules.

[0149] In one embodiment, the computer program may rely on a tangible storage medium such as an optical storage device or a magnetic storage device. In another embodiment, the computer program may also be transmitted and distributed in the form of signals over a network medium, and may be downloaded and installed via the communication section 509, and / or installed from a removable medium 511. The program code contained in the computer program can be transmitted using any suitable network medium, including but not limited to: wireless, wired, etc., or any suitable combination thereof.

[0150] According to embodiments of this disclosure, program code for executing the computer programs provided in embodiments of this disclosure can be written in any combination of one or more programming languages. Specifically, these computational programs can be implemented using high-level procedural and / or object-oriented programming languages, and / or assembly / machine languages. Programming languages ​​include, but are not limited to, languages ​​such as Java, C++, Python, "C", or similar programming languages. The program code can execute entirely on a user's computing device, partially on a user's device, partially on a remote computing device, or entirely on a remote computing device or server. In cases involving remote computing devices, the remote computing device can be connected to the user's computing device via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computing device (e.g., via the Internet using an Internet service provider).

[0151] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, may be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions. Those skilled in the art will understand that the features described in the various embodiments of the present disclosure can be combined and / or combined in various ways, even if such combinations are not explicitly described in the present disclosure. In particular, the features described in the various embodiments of this disclosure may be combined and / or combined in various ways without departing from the spirit and teachings of this disclosure. All such combinations and / or combinations fall within the scope of this disclosure.

[0152] The embodiments of this disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of this disclosure. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of this disclosure, and all such substitutions and modifications should fall within the scope of this disclosure.

Claims

1. A train operation control method, comprising: In response to receiving a first warning signal indicating a first-level short-circuit fault in the traction motor, a first control command is generated to control the train to operate at a first limited speed, wherein the first limited speed is less than the normal operating speed of the train, and the first warning signal is generated by the traction control unit in response to the detection of a first target current more than or equal to a first-time threshold number during a fault detection cycle, wherein the first target current is a current including a negative-sequence current component greater than or equal to a first current threshold; and The first control command is sent to the traction control unit and the braking control unit so that the traction control unit and the braking control unit adjust their respective output forces and coordinate to control the train to run at the first speed limit.

2. The method according to claim 1, wherein, When controlling the train to run at the first speed limit according to the first control command, the method further includes: In response to receiving a second warning signal indicating a second-level short-circuit fault in the traction motor, a second control command is generated to control the train to operate at a second limited speed, wherein the severity of the second-level short-circuit fault is greater than the severity of the first-level short-circuit fault, the second limited speed is less than the first limited speed, the second warning signal is generated by the traction control unit in response to the detection of a second target current more than or equal to a second threshold number during a fault detection cycle, the second target current being a current including a negative-sequence current component greater than or equal to a second current threshold, and the second current threshold being greater than the first current threshold; and The second control command is sent to the traction control unit and the braking control unit so that the traction control unit and the braking control unit adjust their respective output forces and coordinate to control the train to run at the second speed limit.

3. The method according to claim 2, wherein, When controlling the train to run at the first speed limit according to the first control command, the method further includes: In response to receiving a third warning signal indicating a third-level short-circuit fault in the traction motor, a third control command is generated to control the train to operate at a third limited speed, wherein the severity of the third-level short-circuit fault is greater than the severity of the first-level short-circuit fault but less than the severity of the second-level short-circuit fault, the third limited speed is greater than the second limited speed but less than the first limited speed, the third warning signal is generated by the traction control unit in response to the detection of a third target current more than or equal to a third threshold number during a fault detection cycle, the third target current being a current including a negative-sequence current component greater than the first target current and less than the second current threshold; and The third control command is sent to the traction control unit and the braking control unit so that the traction control unit and the braking control unit adjust their respective output forces and coordinate to control the train to run at the third speed limit.

4. The method according to claim 3, wherein when the train is controlled to run at the first limited speed according to the first control command, the method further comprises: In response to the absence of a first warning signal indicating a first-level short-circuit fault in the traction motor, the train is controlled to continue operating at the first-limited speed according to the first control command.

5. The method according to claim 2, wherein, When the train is controlled to run at the second speed limit according to the second control command, the method further includes: In response to the presence of a temperature greater than or equal to a temperature threshold in the temperatures collected by at least one control-level sensor configured on the traction motor, a fourth control command is generated to control the train to stop running; and The fourth control command is sent to the traction control unit and the braking control unit so that the traction control unit and the braking control unit adjust their respective output forces and coordinate to control the train to stop running.

6. The method according to claim 5, wherein, When the train is stopped according to the fourth control command, the method further includes: In response to a temperature where the temperature collected by at least one control-level sensor configured on the traction motor is lower than the temperature threshold, a fifth control command is generated to control the train to operate at a fourth limited speed, wherein the fourth limited speed is lower than the second limited speed; and The fifth control command is sent to the traction control unit and the braking control unit so that the traction control unit and the braking control unit adjust their respective output forces and coordinate to control the train to run at the fourth speed limit.

7. The method according to any one of claims 2 to 6, wherein, When the train is controlled to run at the second speed limit according to the second control command, the method further includes: In response to receiving a fourth warning signal indicating a fourth-level short-circuit fault in the traction motor, a sixth control command is generated to control the train to operate at a fifth speed limit, wherein the severity of the fourth-level short-circuit fault is greater than the severity of the second-level short-circuit fault, the fifth speed limit is less than the second speed limit, the fourth warning signal is generated by the traction control unit in response to the detection of a fourth target current more than or equal to a fourth threshold number of times during a fault detection cycle, the fourth target current being a current including a negative-sequence current component greater than the second target current; and The sixth control command is sent to the traction control unit and the braking control unit so that the traction control unit and the braking control unit adjust their respective output forces and coordinate to control the train to run at the fifth speed limit.

8. The method according to any one of claims 2 to 6, wherein, When the train is controlled to run at the second speed limit according to the second control command, the method further includes: In response to the absence of a second warning signal indicating a second-level short-circuit fault in the traction motor, the train is controlled to continue operating at the second speed limit according to the second control command.

9. An electronic device, comprising: One or more processors; Memory, used to store one or more programs. Wherein, when the one or more programs are executed by the one or more processors, the one or more processors implement the method of any one of claims 1 to 8.

10. A computer-readable storage medium having stored thereon executable instructions that, when executed by a processor, cause the processor to perform the method of any one of claims 1 to 8.

11. A computer program product comprising a computer program that, when executed by a processor, implements the method according to any one of claims 1 to 8.

12. A train, comprising: Brake control unit; The traction control unit is configured to generate a first warning signal indicating that a first-level short-circuit fault has occurred in the traction motor in response to the number of times a first target current is detected in a fault detection cycle being greater than or equal to a first threshold number, wherein the first target current is a current including a negative-sequence current component greater than or equal to a first current threshold number. The train control unit is configured as follows: Upon receiving the first warning signal, a first control command is generated to control the train to operate at a first limited speed, wherein the first limited speed is less than the train's normal operating speed; and Send the first control command to the traction control unit and the braking control unit; The traction control unit and the braking control unit are configured to adjust their respective output forces according to the first control command, and to coordinately control the train to run at the first limited speed.

13. The train according to claim 12, wherein, The traction control unit is also configured to: In response to the number of times the first target current is detected during the fault detection cycle being greater than or equal to the first number threshold, the power switching devices of the traction converter are controlled to perform a three-phase short-circuit operation.

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