Locomotive unpowered loopback control method, system, equipment and medium

Abstract

The invention relates to the field of electric locomotives, and provides a locomotive unpowered loopback control method, system and device and a medium, and the method comprises the steps: obtaining user operation, and entering unpowered loopback according to a preset entering condition and the user operation; a power battery is put in, an auxiliary power supply is started to supply power to auxiliary equipment, and a TCU controls closing of a 2-axis isolation contactor and a 5-axis isolation contactor; switching power supply modes according to the working conditions; and exiting the unpowered loopback according to a preset exit condition and the user operation. According to the locomotive, an extra return power generation device does not need to be added to carry out excitation treatment on the motor, meanwhile, it is guaranteed that the locomotive can supply power to an auxiliary system of the locomotive on the premise that the pantograph does not rise and a main breaker is closed within the full running speed range of the locomotive, and the comfort of crew members is improved.

Description

Technical Field

[0001] The present invention relates to the field of electric locomotives, and in particular to a method, system, equipment and medium for controlling unpowered return of locomotives. Background Art

[0002] The "unpowered return" of a locomotive is often referred to as the "fireless return" of a locomotive, which is the process in which a locomotive is towed to its destination by other powered locomotives without power (the internal combustion engine and diesel engine do not start, and the electric locomotive does not raise the pantograph). The fireless return locomotive is equivalent to a vehicle and needs to be braked and released synchronously with other vehicles.

[0003] When a new locomotive is being built, undergoing high-level maintenance, or being sent back for maintenance after a malfunction, the returning locomotive is set to the fire-free return mode. It is strictly prohibited to raise the pantograph or close the switch during the fire-free return of the locomotive. Therefore, basic living facilities such as ventilation, boiling water, heating meals, heating and lighting cannot be used. The basic living conditions and working environment of the on-duty crew members in terms of cold and heat protection, heatstroke prevention and cooling are extremely poor.

[0004] The existing technology uses solar power generation, which requires the design of special solar power generation equipment, and it must be installed on the top of the locomotive. The use of wind power generation requires the design of special wind power generation equipment, and it must be installed on the top of the locomotive. A special motor is installed to generate electricity. According to the installation size design of the locomotive running gear speed sensor, a special motor is manufactured to generate electricity. The equipment must be installed on the axle head of the locomotive running gear. The above-mentioned related equipment is independently configured and has a large overall size. It must be installed in the warehouse by professionals. The installation is difficult and time-consuming. All the equipment is installed outside the vehicle, which poses a safety hazard of falling off. There are also a series of problems such as configuration location, configuration quantity, and post-configuration management.

[0005] The prior art also proposes that when the locomotive is operating normally, the feedback power supply is not started and its output voltage is zero. The 25 kV AC power of the overhead line is converted into DC power through the four-quadrant converter, so that the output diode of the feedback power supply is reversely cut off, and the intermediate DC voltage supplies power to the traction inverter and auxiliary converter. When unpowered feedback is performed, the pantograph is lowered, the four-quadrant converter is prohibited from running, and the feedback power supply first boosts the 110 V of the battery, and the inverter pre-excites the traction motor. The energy is boosted from the battery through the feedback power supply, enters the intermediate DC link, and is consumed by the hysteresis loss and copper loss generated by the pre-excitation of the traction motor. After the motor establishes the excitation magnetic field, the feedback power supply is turned off, and the traction motor works in the electric state, converting mechanical energy into electrical energy, thereby supplying power to the auxiliary load of the locomotive.

[0006] At the same time, some problems also arise. The locomotive battery 110V needs to be boosted. The locomotive 110V power supply is powered by the locomotive's own battery. It is easy for the low voltage of the battery to cause the motor excitation current to fail to be established normally, resulting in the failure of the traction motor pre-excitation and the inability to establish a magnetic field to work under the electric control condition. The control logic and hardware of this pre-excitation are completely different from the logic control of the normal operation of the locomotive. The control is complex, which will increase the additional locomotive manufacturing cost and failure points. If the feedback power generation device fails, it may affect the normal operation of the locomotive.

[0007] Therefore, without affecting the normal return of the locomotive, and without raising the pantograph or introducing external power, there must be a technology that can supply power to the locomotive's auxiliary equipment and facilities to improve the crew's working environment and quality of life. Summary of the invention

[0008] Based on the above purpose, the present invention proposes a method for controlling unpowered return of a locomotive, comprising: Obtain user operations and enter unpowered return according to preset entry conditions and user operations; The power battery is put into use, the auxiliary power supply is started, the auxiliary equipment is powered, and the TCU controls the closing of the 2nd and 5th axis isolation contactors; Switch the power supply mode according to the working conditions; Exit without power return according to preset exit conditions and user operations.

[0009] In some embodiments, the process of switching the power supply mode according to the working conditions includes: When the power battery stops discharging, or the locomotive speed is greater than 30km / h, the traction inverter and auxiliary power supply of axles 2 and 5 start to work, supply power to auxiliary equipment, charge the power battery, and start the auxiliary machine; When the locomotive speed is less than 20km / h, the traction inverter and auxiliary power supply of axles 2 and 5 stop working, and the power battery starts discharging to supply power to auxiliary equipment.

[0010] In some embodiments, the process of switching the power supply mode according to the working conditions further includes: When the locomotive speed is lower than 30km / h, the power battery is discharged and the auxiliary equipment is powered through the 5-axis auxiliary inverter.

[0011] In some embodiments, the process of switching the power supply mode according to the working conditions further includes: In response to the 2-axis traction inverter or auxiliary power supply being isolated, the auxiliary system is redundantly configured, and the 5-axis auxiliary power supply supplies power to two auxiliary devices; In response to the 5-axis traction inverter being isolated, if the speed is lower than 20km / h, the power battery is put into use to supply power to the auxiliary equipment. If the speed is higher than 30km / h, 2 axes are powered and the auxiliary system is redundantly configured; In response to the 5-axis auxiliary power supply being isolated, if the speed is lower than 20km / h, the power battery is cut off and put into use. If the speed is higher than 30km / h, 2 axes are powered and the auxiliary system is redundantly configured.

[0012] In some embodiments, the conditions for the power battery to exit discharge include SOC < 20% and power battery failure; The conditions for the power battery to enter discharge include when the DC / DC corresponding control unit is not isolated, the power battery is not isolated, and the power battery SOC>80%.

[0013] In some embodiments, the preset entry condition is: The locomotive meets all the following conditions: the locomotive is in a static state, the locomotive end is the effective control end, the AC380V power supply contactor in the depot is not closed, the locomotive is moving forward or backward, ACU1 or ACU2 is not isolated, the locomotive pantograph is lowered and the main circuit breaker is disconnected.

[0014] In some embodiments, the preset exit condition is: The locomotive does not meet any of the following conditions: the locomotive end is the effective control end, the AC380V power supply contactor in the depot is not closed, the locomotive direction is forward or backward, the locomotive pantograph is lowered or the main circuit breaker is disconnected.

[0015] The present invention proposes a system for controlling unpowered return of a locomotive based on a permanent magnet motor, comprising: An entry module configured to obtain user operations and enter the unpowered return according to preset entry conditions and user operations; The starting module is configured to start the power battery, start the auxiliary power supply, and supply power to the auxiliary equipment. The TCU controls the closing of the 2nd and 5th axis isolation contactors; A switching module, configured to switch a power supply mode according to working conditions; The exit module is configured to exit the unpowered loopback according to preset exit conditions and user operations.

[0016] The present invention provides a computer device, comprising: At least one processor; and a memory storing a computer program executable on the processor, wherein the processor executes the steps of the method for controlling unpowered return of a locomotive when executing the program.

[0017] The present invention proposes a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for controlling unpowered return of a locomotive are executed.

[0018] The present invention has at least the following beneficial technical effects: The present invention proposes a method, system, device and medium for controlling unpowered return of a locomotive, the method comprising: obtaining user operation, entering unpowered return according to preset entry conditions and user operation; putting the power battery into operation, starting the auxiliary power supply, supplying power to the auxiliary equipment, and TCU controlling the closing of the 2nd and 5th axis isolation contactors; switching the power supply mode according to the working conditions; and exiting the unpowered return according to the preset exit conditions and user operation.

[0019] The locomotive of the present invention does not need to add additional feedback power generation devices to excite the motor. At the same time, it also ensures that within the full speed range of the locomotive, the locomotive can supply power to the auxiliary system of the locomotive without raising the pantograph and closing the main circuit breaker, thereby improving the comfort of the crew. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A flow chart of a method for controlling unpowered return of a locomotive provided by the present invention; Figure 2 A system module diagram of a locomotive unpowered return control based on a permanent magnet motor provided by the present invention; Figure 3 A configuration diagram of an unpowered return system of an embodiment of a method for controlling unpowered return of a locomotive provided by the present invention; Figure 4 A schematic diagram of energy flow of a traction system during unpowered backhaul power generation according to an embodiment of a method for controlling unpowered backhaul of a locomotive provided by the present invention; Figure 5 A locomotive state diagram of an unpowered return process of an embodiment of a locomotive unpowered return control method provided by the present invention; Figure 6 A schematic diagram of the structure of an embodiment of a computer device provided by the present invention; Figure 7 A schematic diagram of the structure of an embodiment of a computer-readable storage medium provided by the present invention. DETAILED DESCRIPTION

[0022] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention are further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0023] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.

[0024] The present invention proposes a method for controlling the unpowered return of a locomotive. Figure 1 ,include: S1: Obtain user operation and enter unpowered return according to preset entry conditions and user operation; S2: The power battery is put into use, the auxiliary power supply is started, the auxiliary equipment is powered, and the TCU controls the closing of the 2nd and 5th axis isolation contactors; S3: switch the power supply mode according to the working conditions; S4: Exit without power return according to the preset exit conditions and user operation.

[0025] Auxiliary equipment includes the air conditioner in the driver's cab at the effective control end and the water pump of inverter 2. When the power battery is discharged, only the air conditioner in the driver's cab at the effective control end and the water pump of inverter 2 are allowed to start.

[0026] Without raising the pantograph or closing the main circuit breaker, the locomotive can continuously supply power to the auxiliary system, which ensures the stable operation of the auxiliary system within the full speed range of the locomotive. The auxiliary system includes key equipment such as lighting, ventilation, heating, and control circuits. Their normal operation is crucial to the working environment of the crew and the overall operation of the train. The use of auxiliary power supply can reduce these unnecessary energy consumption and emissions, and achieve more environmentally friendly locomotive operation.

[0027] In some embodiments, see Figure 1 and Figure 3 , the process of switching the power supply mode according to the working conditions includes: When the power battery stops discharging, or the locomotive speed is greater than 30km / h, the traction inverter and auxiliary power supply of axles 2 and 5 start to work, supply power to auxiliary equipment, charge the power battery, and start the auxiliary machines; the auxiliary machines include cooling towers, traction fans, When the locomotive speed is less than 20km / h, the traction inverter and auxiliary power supply of axles 2 and 5 stop working, and the power battery starts to discharge to supply power to auxiliary equipment. When conditions permit, the auxiliary power supply can be started again, and the power battery discharges to supply power to the air conditioner and the inverter 2 water pump.

[0028] Permanent magnet motors use permanent magnets to generate magnetic fields without the need for additional excitation current, thereby reducing energy loss and improving energy conversion efficiency. The traction inverter can accurately control the torque current of the traction motor, maintain the constant intermediate DC voltage, and further optimize the energy conversion process. Through the coordinated work of the above equipment, the locomotive can more effectively convert mechanical energy into electrical energy, and then into various forms of energy required by the locomotive, and the overall energy conversion efficiency is significantly improved.

[0029] The traction inverter can accurately control the operating state of the traction motor, ensuring that the locomotive can maintain stable performance and efficiency at different speeds. The permanent magnet motor has a simple structure and does not require an excitation coil or excitation current, which reduces potential failure points and improves system reliability. During the braking or deceleration of the locomotive, the traction motor can operate in an electric braking state, converting mechanical energy into electrical energy, providing DC voltage for the auxiliary converter, and realizing effective energy recovery and utilization.

[0030] When the locomotive is running at a high speed, the power battery is charged, which can make full use of the energy generated during the locomotive's running or braking process and convert it into electrical energy for storage, which helps to balance the energy needs of the locomotive at different speeds and improve energy utilization efficiency.

[0031] When the locomotive speed is low, the power battery discharges to provide auxiliary power or driving power for the locomotive, ensuring that the locomotive has sufficient energy support during low-speed driving or starting phase, reducing dependence on traditional energy.

[0032] Through reasonable charging and discharging management, the service life of the power battery can be extended and the frequency and cost of battery replacement can be reduced.

[0033] In some embodiments, see Figure 1 and Figure 3 , the process of switching the power supply mode according to the working conditions also includes: When the locomotive speed is lower than 30km / h, the power battery is discharged and the auxiliary equipment is powered through the 5-axis auxiliary inverter.

[0034] The 5-axis auxiliary power supply provides power to two auxiliary circuits.

[0035] The 5-axis auxiliary power supply provides a redundant design for the two auxiliary power supplies, that is, when one of the power supplies fails, the other can immediately take over to ensure the continuity of power supply and greatly improve the reliability of power supply. When one power supply fails, the system can automatically or manually switch to the other power supply. The switching process is fast and smooth, and will not cause any impact on the operation of the locomotive.

[0036] The 5-axis auxiliary power supply can flexibly distribute energy to the two auxiliary power supplies according to the actual needs and operating status of the locomotive, ensuring that the locomotive can achieve the best energy utilization effect under different working conditions. The design of the 5-axis auxiliary power supply enables the system to adapt to changes in different working conditions and load requirements. Whether it is high-speed operation or low-speed crawling, the system can provide stable power supply guarantee.

[0037] In some embodiments, see Figure 1 and Figure 3 , the process of switching the power supply mode according to the working conditions also includes: In response to the 2-axis traction inverter or auxiliary power supply being isolated, the auxiliary system is redundantly configured, and the 5-axis auxiliary power supply supplies power to two auxiliary devices; In response to the 5-axis traction inverter being isolated, if the speed is lower than 20km / h, the power battery is put into use to supply power to the auxiliary equipment. If the speed is higher than 30km / h, 2 axes are powered and the auxiliary system is redundantly configured; In response to the 5-axis auxiliary power supply being isolated, if the speed is lower than 20km / h, the power battery is cut off and put into use. If the speed is higher than 30km / h, 2 axes are powered and the auxiliary system is redundantly configured.

[0038] When the 5-axis traction inverter or the 5-axis auxiliary power supply is isolated, the system can automatically switch the power supply according to the speed of the locomotive, ensuring that the auxiliary equipment can obtain a stable power supply under any circumstances. The ability to dynamically adapt to different working conditions greatly improves the reliability of the power supply system.

[0039] When driving at low speeds, the power battery, as the main power source, can make full use of its stored energy to power auxiliary equipment, reduce dependence on traditional energy, and reduce energy consumption and emissions. When the speed is higher than a certain threshold, the system switches to 2-axle power supply to ensure efficient use of energy and avoid energy waste caused by excessive discharge of the power battery when driving at high speeds. It can flexibly respond to the needs of different speeds and different power supply conditions to ensure that the locomotive can operate stably under various working conditions.

[0040] In some embodiments, the conditions for the power battery to exit discharge include SOC < 20% and power battery failure; The conditions for the power battery to enter discharge include when the DC / DC corresponding control unit is not isolated, the power battery is not isolated, and the power battery SOC>80%.

[0041] When the SOC is lower than 20%, the battery is close to a fully discharged state. If the discharge continues, the battery will be deeply discharged, which may cause damage to the internal structure of the battery, such as the shedding of active materials and the decomposition of the electrolyte, thereby shortening the battery life. By setting the conditions for exiting discharge when the SOC is lower than 20%, the battery loss can be reduced, the battery capacity and performance can be maintained, and the overall battery life can be extended. Deep discharge may cause a large amount of heat to be generated inside the battery, which in turn causes thermal runaway of the battery. Thermal runaway is one of the main causes of battery fires and explosions. Therefore, setting the conditions for exiting discharge when the SOC is lower than 20% can help prevent thermal runaway of the battery and improve the safety of the battery. When the battery SOC is too low, the electrolyte inside the battery may become unstable, increasing the risk of battery short circuit. Exiting discharge can avoid this situation and further reduce the risk of battery short circuit.

[0042] When the DC / DC corresponding control unit is not isolated, it means that the circuit connection between the power battery and the electrical equipment is normal, ensuring that the power battery can stably provide power to the electrical equipment and avoiding power interruption caused by control unit failure.

[0043] The fact that the power battery is not isolated is the basic premise for discharge. If the power battery is isolated, then it will not be able to power any device. Therefore, ensuring that the power battery is not isolated is an important condition for ensuring power supply continuity.

[0044] When the SOC of the power battery is greater than 80%, it means that a large amount of electrical energy is stored inside the battery. Discharging at this time can make full use of the battery's energy reserves and avoid wasting electrical energy. In the power system, power batteries are usually used as backup power sources or energy storage devices. By setting reasonable discharge conditions, the distribution and utilization of energy can be optimized to ensure that a stable power supply can be provided to key equipment when needed.

[0045] In some embodiments, the preset entry condition is: The locomotive meets all the following conditions: the locomotive is in a static state, the locomotive end is the effective control end, the AC380V power supply contactor in the depot is not closed, the locomotive is moving forward or backward, ACU1 or ACU2 is not isolated, the locomotive pantograph is lowered and the main circuit breaker is disconnected.

[0046] A locomotive "unpowered return" mode selection button is set on the computer display screen; when the locomotive is stationary, unpowered return can be activated; after exiting unpowered return, the vehicle speed must be reduced to zero before the mode can be activated again; the locomotive can manually exit the unpowered return mode at any time.

[0047] When the locomotive is in a static state and this end is the effective operating end, it can ensure that only authorized operators can start the locomotive, preventing unauthorized misoperation.

[0048] The pantograph is lowered and the main circuit breaker is disconnected, cutting off the electrical connection between the locomotive and the power grid, avoiding safety accidents caused by electrical failure or misoperation.

[0049] Keeping the ACU unisolated facilitates quick response and diagnosis of the locomotive status, thus indirectly improving safety.

[0050] In some embodiments, the preset exit condition is: The locomotive does not meet any of the following conditions: the locomotive end is the effective control end, the AC380V power supply contactor in the depot is not closed, the locomotive direction is forward or backward, the locomotive pantograph is lowered or the main circuit breaker is disconnected.

[0051] When the locomotive end is not an effective operating end, it means that the end cannot be controlled, preventing misoperation and thus improving the safety of locomotive operation.

[0052] When the locomotive is not ready to start, keeping the AC380V power supply contactor in the depot in an unclosed state can prevent the locomotive from being accidentally powered on, avoiding energy waste and potential safety risks. When repairing the locomotive electrical system, disconnecting the AC380V power supply contactor can ensure that maintenance personnel will not be electrocuted while working, thereby ensuring the safety of the maintenance process.

[0053] When the locomotive direction is not set, the driving direction can be flexibly selected according to actual needs, and the locomotive can respond flexibly in various scenarios. Before the driving direction is clear, the locomotive is in standby mode, which can avoid the wrong driving direction caused by misoperation.

[0054] The lowering of the pantograph or the disconnection of the main circuit breaker means that the electrical connection between the locomotive and the power grid is cut off, preventing safety accidents caused by electrical failures. When the locomotive is not running, disconnecting from the power grid can reduce unnecessary power consumption and reduce operating costs.

[0055] The present invention proposes a system for locomotive unpowered return control based on permanent magnet motor, please refer to Figure 2 ,include: An entry module 100 is configured to obtain a user operation and enter the unpowered return according to a preset entry condition and the user operation; The starting module 200 is configured to start the power battery, start the auxiliary power supply, supply power to the auxiliary equipment, and the TCU controls the closing of the 2nd and 5th axis isolation contactors; A switching module 300 is configured to switch the power supply mode according to the working conditions; The exit module 400 is configured to exit the unpowered return according to a preset exit condition and user operation.

[0056] In some embodiments, see Figure 3 , Figure 4 and Figure 5 , (1) Configuration of the unpowered return system Figure 3 , the network control system issues a no-power return instruction; (2) The power battery is put into use, the auxiliary power supply is started, and power is supplied to the air conditioner and the water pump of converter 2; the TCU controls and closes the isolation contactors of axes 2 and 5; if the power battery cannot be discharged due to insufficient power or faults, continue to execute (3); (3) When the locomotive speed reaches 30 km / h or above, the traction inverters and auxiliary power supplies of the 2nd and 5th axles are put into operation, the power battery is changed from the discharge state to the charging state, and the relevant auxiliary machines (such as cooling towers and traction fans) are started; (4) If the locomotive reaches a speed below 20 km / h, the traction inverters and auxiliary power supplies of axles 2 and 5 will stop working. When conditions permit, the auxiliary power supply can be restarted, the power battery will be discharged, and power will be supplied to the air conditioner and the water pump of converter 2; (5) If there is no power return to the 2-axis traction inverter or the auxiliary power supply is isolated, the auxiliary system is redundantly configured, and the 5-axis auxiliary power supply is used to supply power to the two auxiliary systems; (6) If there is no power feedback, the 5-axis traction inverter is isolated. If the speed is lower than 20 km / h, the power battery is put into use to supply power to the air conditioner and the 2nd water pump of the converter. When the speed is higher than 30 km / h, the 2nd axis enters the no-power feedback power generation mode, and the auxiliary system is redundantly configured; (7) If there is no power feedback, the auxiliary power supply of the 5-axis is isolated. If the speed is lower than 20km / h, the power battery is cut off and put into use. When the speed is higher than 30km / h, the 2-axis enters the no-power feedback power generation mode, and the auxiliary system is redundantly configured. The energy flow diagram of the traction system when there is no power feedback power generation is as follows: Figure 4 As shown. When the locomotive speed is lower than 30km / h, the power battery is discharged, and the power is provided to the intermediate circuit of the locomotive 5 axles through the DC / DC voltage regulator link, and then all auxiliary loads are powered through the auxiliary inverter 2; when the locomotive speed is greater than 30km / h, since the locomotive uses a permanent magnet motor, no additional excitation is required, so it can be directly activated by the traction inverter, and the intermediate DC voltage is maintained constant by controlling the torque current of the traction motor. The traction motor works in the electric state, converting mechanical energy into electrical energy to provide DC voltage for the auxiliary converter. The energy is converted from the traction motor to DC through the inverter, and then flows to the auxiliary load through the three-phase auxiliary inverter and also charges the power battery. When the locomotive speed is lower than 20km / h, the auxiliary machine is powered by the power battery.

[0057] Through actual tests in locomotive operation, it is verified that when the speed is lower than the required speed, the power battery supplies power to the auxiliary machine through DC-DC, and when the speed is higher than the speed requirement, the inverter is started and the auxiliary power supply is supplied through permanent magnet motor braking.

[0058] Figure 5 The figure is the test result. When the speed is lower than the required speed, the power battery supplies power to the intermediate DC circuit through DC-DC. When the speed exceeds the required speed (30km / h), the inverter gate starts to enter the voltage control mode, controls the intermediate DC voltage to remain at 1800V and supplies power to the APU. At this time, if the power battery SOC is lower than 80%, the power battery is charged at the same time. When the speed is lower than 20km / h, the permanent magnet motor braking ends, the inverter stops, and the power battery supplies power to the intermediate DC circuit. During this period, the auxiliary power supply APU starts normally.

[0059] Based on the same inventive concept, according to another aspect of the present invention, Figure 6 As shown, an embodiment of the present invention further provides a computer device 30, which includes a processor 310 and a memory 320. The memory 320 stores a computer program 321 that can be run on the processor. When the processor 310 executes the program, the steps of the above method are performed.

[0060] Based on the same inventive concept, according to another aspect of the present invention, Figure 7 As shown, an embodiment of the present invention further provides a computer-readable storage medium 40, which stores a computer program 410 for executing the above method when executed by a processor.

[0061] The embodiment of the present invention may also include a corresponding computer device. The computer device includes a memory, at least one processor, and a computer program stored in the memory and executable on the processor, and the processor executes any one of the above methods when executing the program.

[0062] The memory, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer executable programs and modules, such as program instructions / modules in the embodiments of the present application. The processor executes various functional applications and data processing of the device by running the non-volatile software programs, instructions and modules stored in the memory, that is, implementing the above method.

[0063] The memory may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the device, etc. In addition, the memory may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In an embodiment, the memory may optionally include a memory remotely arranged relative to the processor, and these remote memories may be connected to the local module via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0064] Finally, it should be noted that a person skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, the storage medium of the program can be a disk, an optical disk, a read-only storage memory (ROM) or a random access memory (RAM), etc. The above-mentioned computer program embodiments can achieve the same or similar effects as the corresponding above-mentioned arbitrary method embodiments.

[0065] It will also be appreciated by those skilled in the art that various exemplary logic blocks, modules, circuits and algorithm steps described in conjunction with the disclosure herein can be implemented as electronic hardware, computer software or a combination of the two. In order to clearly illustrate this interchangeability of hardware and software, a general description has been given to the functions of various schematic components, blocks, modules, circuits and steps. Whether this function is implemented as software or hardware depends on specific applications and the design constraints imposed on the entire system. Those skilled in the art can implement the function in various ways for each specific application, but this implementation decision should not be interpreted as causing a departure from the disclosed scope of the embodiments of the present invention.

[0066] The above are exemplary embodiments disclosed in the present invention, but it should be noted that various changes and modifications may be made without departing from the scope of the embodiments disclosed in the present invention as defined in the claims. The functions, steps and / or actions of the method claims according to the disclosed embodiments described herein do not need to be performed in any particular order. The serial numbers of the embodiments disclosed in the above embodiments of the present invention are for description only and do not represent the advantages and disadvantages of the embodiments. In addition, although the elements disclosed in the embodiments of the present invention may be described or required in individual form, they may also be understood as multiple unless explicitly limited to the singular.

[0067] It should be understood that, as used herein, the singular forms "a", "an" are intended to include the plural forms as well, unless the context clearly supports an exception. It should also be understood that, as used herein, "and / or" refers to any and all possible combinations including one or more of the associated listed items.

[0068] A person skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the disclosure of the embodiments of the present invention (including the claims) is limited to these examples; under the concept of the embodiments of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and there are many other changes in different aspects of the above embodiments of the present invention, which are not provided in detail for the sake of simplicity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.

Claims

1. A method for controlling unpowered locomotive return, characterized in that: include: Obtain user operations and enter unpowered return according to preset entry conditions and user operations; The power battery is put into use, the auxiliary power supply is started, the auxiliary equipment is powered, and the TCU controls the closing of the 2nd and 5th axis isolation contactors; Switch the power supply mode according to the working conditions; Exit without power return according to preset exit conditions and user operations.

2. A method for controlling unpowered locomotive return according to claim 1, characterized in that: The process of switching the power supply mode according to the working conditions includes: When the power battery stops discharging, or the locomotive speed is greater than 30km / h, the traction inverter and auxiliary power supply of axles 2 and 5 start to work, supply power to auxiliary equipment, charge the power battery, and start the auxiliary machine; When the locomotive speed is less than 20km / h, the traction inverter and auxiliary power supply of axles 2 and 5 stop working, and the power battery starts discharging to supply power to auxiliary equipment.

3. The method for controlling unpowered return of a locomotive according to claim 1, characterized in that: The process of switching the power supply mode according to the working conditions also includes: When the locomotive speed is lower than 30km / h, the power battery is discharged and the auxiliary equipment is powered through the 5-axis auxiliary inverter.

4. The method for controlling unpowered return of a locomotive according to claim 1, characterized in that: The process of switching the power supply mode according to the working conditions also includes: In response to the 2-axis traction inverter or auxiliary power supply being isolated, the auxiliary system is redundantly configured, and the 5-axis auxiliary power supply supplies power to two auxiliary devices; In response to the 5-axis traction inverter being isolated, if the speed is lower than 20km / h, the power battery is put into use to supply power to the auxiliary equipment. If the speed is higher than 30km / h, 2 axes are powered and the auxiliary system is redundantly configured; In response to the 5-axis auxiliary power supply being isolated, if the speed is lower than 20km / h, the power battery is cut off and put into use. If the speed is higher than 30km / h, 2 axes are powered and the auxiliary system is redundantly configured.

5. The method for controlling unpowered return of a locomotive according to claim 2, characterized in that: The conditions for the power battery to exit discharge include SOC < 20% and power battery failure; The conditions for the power battery to enter discharge include when the DC / DC corresponding control unit is not isolated, the power battery is not isolated, and the power battery SOC>80%.

6. The method for controlling unpowered locomotive return according to claim 1, characterized in that: The preset entry conditions are: The locomotive meets all the following conditions: the locomotive is in a static state, the locomotive end is the effective control end, the AC380V power supply contactor in the depot is not closed, the locomotive is moving forward or backward, ACU1 or ACU2 is not isolated, the locomotive pantograph is lowered and the main circuit breaker is disconnected.

7. The method for controlling unpowered locomotive return according to claim 1, characterized in that: The preset exit conditions are: The locomotive does not meet any of the following conditions: the locomotive end is the effective control end, the AC380V power supply contactor in the depot is not closed, the locomotive direction is forward or backward, the locomotive pantograph is lowered or the main circuit breaker is disconnected.

8. A system for controlling unpowered locomotive return, characterized in that: include: An entry module configured to obtain user operations and enter the unpowered return according to preset entry conditions and user operations; The starting module is configured to start the power battery, start the auxiliary power supply, and supply power to the auxiliary equipment. The TCU controls the closing of the 2nd and 5th axis isolation contactors; A switching module, configured to switch a power supply mode according to working conditions; The exit module is configured to exit the unpowered loopback according to preset exit conditions and user operations.

9. A computer device comprising: at least one processor; and a memory storing a computer program executable on the processor, wherein the processor executes the steps of a method for controlling unpowered return of a locomotive as claimed in any one of claims 1 to 7 when executing the program.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method for controlling unpowered return of a locomotive as claimed in any one of claims 1 to 7 are performed.

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