Train power supply method, system, device and train

Abstract

The present application discloses a train power supply method, system, device and train, which relate to the field of rail transit. In this scheme, it is determined whether the train has traveled to the transition zone according to the received flag signal. If so, the voltage output by the backup power module to the intermediate DC circuit is controlled to be within the preset range of the voltage output by the main power module to the intermediate DC circuit, wherein the transition zone is the area before the train travels to the power-free zone. Before the main power module is unable to power the traction module, the present application switches the power supply of the traction module to the backup power module, so that when the train travels to the power-free zone, the traction module can be normally powered by the backup power module. In addition, since there is always voltage on the intermediate DC circuit, seamless switching between power modules can be achieved, and there is no step of controlling the main power module to turn off or the backup power module to turn on. The switching process is smooth, and it can operate on large slopes or more frequent power-free zones.

Description

Technical Field

[0001] The present application relates to the field of rail transit, and in particular to a train power supply method, system, device and train. Background Art

[0002] In the current trains with multiple power sources, if the power supply on the grid side that is currently supplying power to the train's traction module (using the power supply on the grid side as the main power module) cannot supply power normally, if the backup power module is switched at this time, the train needs to reduce the traction load, disconnect the main circuit breaker, control the train to stop, switch the power supply mode, close the main circuit breaker, and switch the traction characteristics. If the backup power module is not switched at this time, the train needs to interrupt traction, disconnect the main circuit breaker, and after the power supply on the grid side is restored, reclose the main circuit breaker and continue to realize the traction function.

[0003] It can be seen that in the prior art, when the power supply at the grid end cannot normally supply power to the traction module of the train, regardless of whether it is switched to another power supply, the traction module will experience power interruption, which will lead to the interruption of the traction of the train, affecting the normal traction of the train, causing great power loss to the operation of the train, and is not conducive to operation on large slopes or more frequent power-free areas. Summary of the invention

[0004] The purpose of the present application is to provide a train power supply method, system, device and train, which switches the power supply of the traction module to the backup power module before the main power module is unable to supply power to the traction module, so that when the train travels to a power-free zone, the traction module can be normally powered by the backup power module. In addition, in the present application, there is always voltage on the intermediate DC circuit, thereby achieving seamless switching between power modules. There is no step of controlling the main power module to turn off or the backup power module to turn on, and the switching process is smooth, so that the train can operate on steep slopes or frequently power-free zones.

[0005] In order to solve the above technical problems, the present application provides a train power supply method, which is applied to a processor in a train, wherein the train further comprises a main power module, a backup power module, an intermediate DC circuit, an inverter module and a traction module, wherein the main power module is used to supply power to the traction module through the intermediate DC circuit and the inverter module, and the backup power module is used to supply power to the traction module through the intermediate DC circuit and the inverter module when the main power module cannot supply power to the traction module; the method comprises:

[0006] Determine whether the train has traveled to a conversion zone according to the received flag signal, wherein the conversion zone is a preset area before the train travels to a power-free zone, and the power-free zone is an area where the main power source cannot supply power to the traction module;

[0007] If so, the voltage output by the backup power module to the intermediate DC circuit is controlled to be within a preset range of the voltage output by the main power module to the intermediate DC circuit, so that when the train travels to the power-free area, the power supply of the traction module is switched from the main power module to the backup power module.

[0008] Preferably, controlling the voltage outputted by the backup power module to the intermediate DC circuit to be within a preset range of the voltage outputted by the main power module to the intermediate DC circuit comprises:

[0009] Acquire a first voltage range outputted from the main power module to the intermediate DC circuit;

[0010] The voltage output by the backup power supply module to the intermediate DC circuit is controlled to be no less than a preset voltage of an upper limit value of the first voltage range.

[0011] Preferably, the backup power supply module includes a backup power supply and a first voltage conversion module;

[0012] Controlling the voltage output by the backup power module to the intermediate DC circuit to be not less than a preset voltage of an upper limit value of the first voltage range includes:

[0013] The first voltage conversion module is controlled to convert the voltage output by the backup power supply into a preset voltage that is not less than an upper limit value of the first voltage range.

[0014] Preferably, controlling the voltage outputted by the backup power module to the intermediate DC circuit to be within a preset range of the voltage outputted by the main power module to the intermediate DC circuit comprises:

[0015] Acquire the current voltage currently outputted by the main power module to the intermediate DC circuit;

[0016] Acquire a second voltage range output by the backup power module to the intermediate DC circuit;

[0017] Determining whether the current voltage is greater than a lower limit value in the second voltage range;

[0018] If so, the voltage output by the main power module to the intermediate DC circuit is controlled to be reduced to a preset voltage that is not greater than a lower limit value in the second voltage range.

[0019] Preferably, the main power supply module comprises a main power supply and a second voltage conversion module;

[0020] Controlling the voltage output by the main power module to the intermediate DC circuit to decrease to a preset voltage not greater than a lower limit value in the second voltage range includes:

[0021] The second voltage conversion module is controlled to convert the voltage output by the main power supply into a preset voltage not greater than a lower limit value in the second voltage range.

[0022] Preferably, judging whether the train has traveled to the transfer area according to the received sign signal includes:

[0023] A flag signal sent by a ground train system is received, and according to the flag signal, it is determined whether the train has traveled to the transfer area.

[0024] Preferably, after the train travels to the power-free area, the method further comprises:

[0025] The traction power of the train is obtained, and the backup power module is controlled to adjust the voltage value output to the intermediate DC circuit according to its own power supply characteristics and the traction power.

[0026] In order to solve the above technical problems, the present application also provides a train power supply system, which is applied to a processor in a train, wherein the train further comprises a main power module, a backup power module, an intermediate DC circuit, an inverter module and a traction module, wherein the main power module is used to supply power to the traction module through the intermediate DC circuit and the inverter module, and the backup power module is used to supply power to the traction module through the intermediate DC circuit and the inverter module when the main power module cannot supply power to the traction module; the system comprises:

[0027] an area determination unit, configured to determine whether the train has traveled to a transfer area according to a received flag signal, wherein the transfer area is a preset area before the train travels to a power-free area, and the power-free area is an area where the main power supply cannot supply power to the traction module;

[0028] A voltage control unit is used to control the voltage output by the backup power module to the intermediate DC circuit to be within a preset range of the voltage output by the main power module to the intermediate DC circuit when the train travels to the conversion area, so that when the train travels to the power-free area, the power supply of the traction module is switched from the main power module to the backup power module.

[0029] In order to solve the above technical problems, the present application also provides a train power supply device, comprising:

[0030] Memory for storing computer programs;

[0031] The processor is used to implement the steps of the train power supply method as described above when storing a computer program.

[0032] In order to solve the above technical problems, the present application also provides a train, including a main power module, a backup power module, an intermediate DC circuit, an inverter module, a traction module and a train power supply device as described above, wherein the main power module is used to power the traction module through the intermediate DC circuit and the inverter module, and the backup power module is used to power the traction module through the intermediate DC circuit and the inverter module when the main power module cannot power the traction module.

[0033] The present application provides a train power supply method, which relates to the field of rail transit. In this scheme, it is determined whether the train has traveled to the transition zone based on the received flag signal. If so, the voltage output by the backup power module to the intermediate DC circuit is controlled to be within the preset range of the voltage output by the main power module to the intermediate DC circuit, wherein the transition zone is the area before the train travels to the power-free zone. Before the main power module is unable to power the traction module, the present application switches the power supply of the traction module to the backup power module, so that when the train travels to the power-free zone, the traction module can be normally powered by the backup power module. In addition, since there is always voltage on the intermediate DC circuit, seamless switching between power modules can be achieved, and there is no step of controlling the main power module to turn off or the backup power module to turn on, and the switching process is smooth.

[0034] The present application also provides a train power supply system, device and train, which have the same beneficial effects as the train power supply method described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the prior art and the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 A flow chart of a train power supply method provided in this application;

[0037] Figure 2 A structural block diagram of a train provided for this application;

[0038] Figure 3 A schematic diagram of regional division provided for this application;

[0039] Figure 4 A schematic diagram of a first power module provided in this application;

[0040] Figure 5 A schematic diagram of a second power module provided in this application;

[0041] Figure 6 A structural block diagram of a train power supply system provided in this application;

[0042] Figure 7 This is a structural block diagram of a train power supply device provided in this application. DETAILED DESCRIPTION

[0043] The core of the present application is to provide a train power supply method, system, device and train. Before the main power module is unable to power the traction module, the power supply of the traction module is switched to the backup power module, so that when the train travels to a power-free area, the traction module can be normally powered by the backup power module. In addition, in the present application, there is always voltage on the intermediate DC circuit, so that seamless switching between power modules can be achieved. There is no step of controlling the main power module to turn off or the backup power module to turn on. The switching process is smooth, and it can operate on large slopes or more frequent power-free areas.

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] Please refer to Figure 1 , Figure 1 A flow chart of a train power supply method provided in the present application, the method is applied to a processor in a train, the train also includes a main power module, a backup power module, an intermediate DC circuit, an inverter module and a traction module, the main power module is used to power the traction module through the intermediate DC circuit and the inverter module, and the backup power module is used to power the traction module through the intermediate DC circuit and the inverter module when the main power module cannot power the traction module; the method includes:

[0046] Before describing the train power supply method in this application, each module in the train is first described. Figure 2 , Figure 2 A structural block diagram of a train provided in the present application, wherein the output end of the main power module and the output end of the backup power module are both connected to the input end of the intermediate DC circuit, and the DC voltage of the intermediate DC circuit is inverted into AC power by the inverter module to power the traction module of the train to realize the traction function of the train.

[0047] Among them, the main power module is usually the overhead line or the third rail, and the backup power supply usually refers to the energy storage module, such as energy storage batteries.

[0048] S11: judging whether the train has traveled to the transfer area according to the received sign signal, where the transfer area is a preset area before the train travels to the power-free area, where the power-free area is an area where the main power supply cannot supply power to the traction module;

[0049] For details, please refer to Figure 3 , Figure 3 A schematic diagram of area division provided for the present application divides the train's route into a main power supply area (also referred to as a power supply area), a conversion area, and a non-power supply area, wherein in the power supply area, the main power supply module supplies power to the train's traction module, and in the non-power supply area, the main power supply module cannot supply power to the train's traction module. The conversion area is a preset area before the train is about to enter the non-power supply area. The conversion area can be divided according to the distance of the train's running track, such as the preset distance before the train enters the non-power supply area, or it can be divided according to the train's running speed and track distance, such as the preset time period before the train enters the non-power supply area, which can be used as a conversion area;

[0050] Of course, other implementations are also possible, and this application does not limit them here.

[0051] Specifically, the design idea of ​​the present application is: if seamless switching of the main power module and the backup power module is to be achieved, the main power module and the backup power module need to be implemented before the train enters the power-free area to complete the preparation work or the power switching process.

[0052] Therefore, in the present application, it is determined whether the train has reached the transition area based on the received flag signal. If so, the relevant steps of preparing for power switching are entered.

[0053] Specifically, the specific implementation method of obtaining the flag signal can be: detecting the train's driving position through an external sensor, and when it detects that the train drives to the transition area, outputting the flag signal corresponding to the transition area to the train's processor, so that the train executes subsequent steps based on this flag signal.

[0054] In a specific embodiment, this flag signal can be but is not limited to being sent by a ground train system located on the ground, that is, the ground train system detects the position of the train and outputs a flag signal corresponding to the train position to the train's processor. When its flag signal corresponds to the transition zone, the train executes steps related to power switching.

[0055] Among them, the flag signal can be a character string or a flag bit, etc., and this application does not make any special limitations here, as long as the corresponding function can be achieved.

[0056] S12: If yes, control the voltage outputted from the backup power module to the intermediate DC circuit to be within a preset range of the voltage outputted from the main power module to the intermediate DC circuit, so that when the train reaches a power-free area, the power supply of the traction module is switched from the main power module to the backup power module.

[0057] When it is detected that the train enters the conversion zone, the voltage output by the backup power module to the intermediate DC circuit is controlled to be any voltage within a preset range of the voltage output by the main power module to the intermediate DC circuit. There are three situations at this time. First, the voltage output by the backup power module to the intermediate DC circuit is greater than the voltage output by the main power module to the intermediate DC circuit. At this time, the module with a larger voltage automatically shields the module with a larger voltage, that is, in the conversion zone, the voltage of the intermediate DC circuit is switched from the main power module to the backup power module, that is, the power supply of the traction module has completed the step of switching from the main power module to the backup power module in the conversion zone. At this time, if the train travels to a power-free zone, there is no need to execute the power module switching step, and the traction module will not be powered off. Second, the voltage outputted by the backup power module to the intermediate DC circuit is equal to the voltage outputted by the main power module to the intermediate DC circuit. At this time, in the conversion area, the voltage of the intermediate DC circuit can be provided by the main power module or the backup power module. Even if the traction module is powered by the main power module in the conversion area, when the train travels to the power-free area, since the intermediate DC circuit also includes the voltage outputted by the backup power module, that is, there is always a power supply voltage on the intermediate DC circuit, at this time, the traction module is directly powered by the voltage outputted by the backup power module to the intermediate DC circuit, and there is no power outage. Third, the voltage outputted by the backup power module to the intermediate DC circuit is less than the voltage outputted by the main power module to the intermediate DC circuit. At this time, in the conversion area, the voltage of the intermediate DC circuit is provided by the main power module. When the train travels to the power-free area, the voltage of the intermediate DC circuit is provided by the backup power module. Since the backup power module always outputs voltage to the intermediate DC circuit, there is a continuous power supply voltage on the intermediate DC circuit. At this time, the traction module is directly powered by the voltage outputted by the backup power module to the intermediate DC circuit, and there is no power outage.

[0058] It should be noted that, under normal circumstances, when adjusting the voltage output from the backup power module to the intermediate DC circuit, it is adjusted to be not less than the voltage output from the main power module to the intermediate DC circuit, so that it can be ensured that the voltage is switched to the backup power module in the conversion area, and the fluctuation during the switching process is small. Furthermore, the voltage output from the backup power module to the intermediate DC circuit is usually close to the voltage output from the main power module to the intermediate DC circuit, so as to minimize the fluctuation of the voltage on the intermediate DC circuit.

[0059] Among them, the preset range described above can be 20% or other values. The smaller the preset range is, the smaller the voltage fluctuation of the corresponding intermediate DC circuit is. It depends on the actual situation and this application does not make any special limitation here.

[0060] In summary, no matter what the situation is, the power supply method in the present application can realize the switching of the power supply of the traction module, and there is no step of turning off the main power module or turning on the backup power module or reducing the load during the switching process. The switching process is smooth and can be applied to large slopes or more frequent power-free areas.

[0061] Based on the above embodiments:

[0062] To facilitate the understanding of the following, two terms are introduced here: the first is the controllable power supply: it refers to the process of obtaining electric energy from the contact network or the backup power supply, and controlling the power supply voltage within a controllable voltage range through a step-up or step-down device. For example, the contact network voltage is controlled at about 1500V through a controllable rectifier module; the traction battery is controlled at about 900V through a DC / DC module (step-up or step-down device). The second is the uncontrollable power supply: it refers to the process of obtaining electric energy from the contact network or the backup power supply, and directly or through an uncontrolled rectifier to connect to the intermediate DC circuit. At this time, the voltage output to the intermediate DC circuit is automatically connected to the process following the fluctuation of the contact network or the change of the backup power supply voltage. For example, the third rail power supply is directly connected to the intermediate DC circuit, and the voltage of the intermediate DC circuit is consistent with the third rail network voltage; or, the traction battery is directly connected to the intermediate DC circuit, then the voltage of the intermediate DC circuit is consistent with the voltage of the traction battery.

[0063] As a preferred embodiment, controlling the voltage outputted from the backup power module to the intermediate DC circuit to be within a preset range of the voltage outputted from the main power module to the intermediate DC circuit includes:

[0064] Acquire a first voltage range outputted from the main power module to the intermediate DC circuit;

[0065] The voltage output by the backup power supply module to the intermediate DC circuit is controlled to be not less than a preset voltage of an upper limit value of the first voltage range.

[0066] Specifically, when the voltage output by the main power module to the intermediate DC circuit is not a fixed value, the voltage output by the backup power supply to the intermediate DC circuit can be adjusted to a preset voltage that is not less than the upper limit value of the first voltage range according to the first voltage range output by the main power module to the intermediate DC circuit. At this time, it can be ensured that the voltage output by the backup power module to the intermediate DC circuit is not less than the voltage output by the main power module to the intermediate DC circuit, thereby ensuring that seamless switching of the main power module and the backup power module can be achieved in the conversion area.

[0067] Among them, the main power supply module can be a controllable power supply or an uncontrollable power supply. Regardless of whether the main power supply module is a controllable power supply or an uncontrollable power supply, the switching of the two power supply modules can be achieved by controlling the voltage output by the backup power supply module to the intermediate DC circuit to be not less than the preset voltage of the upper limit value of the first voltage range.

[0068] In a specific embodiment, please refer to Figure 4 , Figure 4 Schematic diagram of the first power module provided for this application. Assume that the main power module is a third-rail uncontrollable power supply of DC750V (voltage range is DC500V to DC900V), and the working power under this power supply standard is 750kW; the backup power module is a controllable energy storage power supply (basic voltage is 400V, controllable boost to a maximum of 1000V), allowing traction power of 150kW. When in the power supply area, the power supply of the main power module follows the third-rail network voltage fluctuations, which is an uncontrollable power supply. The voltage of the intermediate DC circuit fluctuates with the characteristics of the main power module, and the maximum traction power is 750kW. When in the conversion zone, the traction power is reduced to a maximum of less than 150kW, and then the power supply voltage is increased to 900V (it can also be set within 20% based on actual conditions) through the controllable power supply (backup power module) to facilitate the impact on the intermediate DC circuit when entering the power-free zone; when entering the power-free zone, the traction power is maintained within 150kW; the controllable power supply (backup power module) can control the voltage at about DC750V.

[0069] As a preferred embodiment, the backup power supply module includes a backup power supply and a first voltage conversion module;

[0070] Controlling the voltage outputted by the backup power supply module to the intermediate DC circuit to be not less than a preset voltage of an upper limit value of a first voltage range includes:

[0071] The first voltage conversion module is controlled to convert the voltage output by the backup power supply into a preset voltage that is not less than an upper limit value of the first voltage range.

[0072] On the basis of the above-described adjustable voltage outputted by the backup power module to the intermediate DC circuit, it means that the output voltage of the backup power module is adjustable, that is, a first voltage conversion module is provided at the output end of the backup power module for converting the output voltage of the backup power module. In this embodiment, the first voltage conversion module is used to convert the voltage outputted by the backup power module to the intermediate DC circuit into a preset voltage not less than the upper limit value of the first voltage range.

[0073] As a preferred embodiment, controlling the voltage outputted from the backup power module to the intermediate DC circuit to be within a preset range of the voltage outputted from the main power module to the intermediate DC circuit includes:

[0074] Obtain the current voltage currently output by the main power module to the intermediate DC circuit;

[0075] Acquire a second voltage range outputted from the backup power module to the intermediate DC circuit;

[0076] Determining whether the current voltage is greater than a lower limit value in the second voltage range;

[0077] If so, the voltage output by the main power module to the intermediate DC circuit is controlled to be reduced to a preset voltage that is not greater than a lower limit value in the second voltage range.

[0078] Specifically, when the voltage output by the backup power module to the intermediate DC circuit is not a fixed value, the voltage output by the main power module to the intermediate DC circuit can be adjusted to a preset voltage that is not less than the lower limit value of the first voltage range according to the second voltage range output by the backup power module to the intermediate DC circuit. At this time, it can be ensured that the voltage output by the backup power module to the intermediate DC circuit is not less than the voltage output by the main power module to the intermediate DC circuit, thereby ensuring that seamless switching of the main power module and the backup power module can be achieved in the conversion area.

[0079] Among them, the backup power supply module can be a controllable power supply or an uncontrollable power supply. Regardless of whether the main power supply module is a controllable power supply or an uncontrollable power supply, the switching of the two power supply modules can be achieved by controlling the output voltage of the main power supply module to be no greater than the lower limit value of the voltage output by the backup power supply module to the intermediate DC circuit.

[0080] It should be noted that the voltage outputted from the main power module to the intermediate DC circuit can also be controlled to be reduced to no more than the voltage currently outputted from the backup power module to the intermediate DC circuit. Since the output voltage of the backup power module is uncontrollable, the voltage outputted from the backup power module to the intermediate DC circuit will change. To ensure that the switching of the main power module and the backup power module can be achieved in the conversion area, the voltage outputted from the main power module to the intermediate DC circuit can be controlled to be reduced to a preset voltage no more than the lower limit value in the second voltage range.

[0081] In a specific embodiment, please refer to Figure 5 , Figure 5Schematic diagram of the second power module provided for this application. Assuming that the main power module is an overhead line AC25kV (IGBT is used to control the power supply, and the voltage output to the intermediate DC circuit after control is DC1500V), the working power under this power supply standard is 1000kW; the backup power module is an energy storage uncontrollable power supply (the power supply voltage is 800V-1200V, that is, the second voltage range is 800V-1200V), and the allowable power is 200kW. When in the power supply area, the voltage output from the main power module to the intermediate DC circuit can be controlled at about 1500V, and the voltage of the intermediate DC circuit is controllable, which is a controllable power supply, and the maximum traction power is 1000kW. When in the conversion area (if the voltage outputted by the uncontrollable backup power module to the intermediate DC circuit is 1000V at that time), the traction power is reduced to a maximum of 200kW, and then the voltage value outputted by the controllable power supply (main power module) to the intermediate DC circuit is reduced to about 1000V; when entering the power-free area, the traction power is maintained within 200kW; the voltage on the intermediate DC circuit can be naturally adjusted according to the characteristics of the uncontrollable power supply.

[0082] As a preferred embodiment, the main power supply module includes a main power supply and a second voltage conversion module;

[0083] Controlling the voltage outputted by the main power module to the intermediate DC circuit to decrease to a preset voltage not greater than a lower limit value in the second voltage range includes:

[0084] The second voltage conversion module is controlled to convert the voltage output by the main power supply into a preset voltage not greater than a lower limit value in the second voltage range.

[0085] On the basis of the above-described adjustable voltage outputted from the main power module to the intermediate DC circuit, it means that the output voltage of the main power module is adjustable, that is, a second voltage conversion module is provided at the output end of the main power module for converting the output voltage of the main power module. In this embodiment, the second voltage conversion module is used to convert the voltage outputted by the main power supply into a preset voltage not greater than the lower limit value of the second voltage range, and output it to the intermediate DC circuit.

[0086] As a preferred embodiment, after the train travels to the power-free area, the method further includes:

[0087] Obtain the traction power of the train and control the backup power module to adjust the voltage value output to the intermediate DC circuit according to its own power supply characteristics and traction power.

[0088] Specifically, after the switching of the power modules is completed, the voltage value output by the backup power module to the intermediate DC circuit can be adjusted according to the traction power requirement of the train and the power characteristics of the backup power module itself to achieve normal traction of the train.

[0089] In order to solve the above technical problems, this application also provides a train power supply system, please refer to Figure 6 , Figure 6 A structural block diagram of a train power supply system provided in the present application, the system is applied to a processor in a train, the train also includes a main power module, a backup power module, an intermediate DC circuit, an inverter module and a traction module, the main power module is used to power the traction module through the intermediate DC circuit and the inverter module, and the backup power module is used to power the traction module through the intermediate DC circuit and the inverter module when the main power module cannot power the traction module; the system includes:

[0090] The area determination unit 61 is used to determine whether the train has traveled to the transfer area according to the received flag signal. The transfer area is a preset area before the train travels to the power-free area. The power-free area is an area where the main power supply cannot supply power to the traction module.

[0091] The voltage control unit 62 is used to control the voltage output by the backup power module to the intermediate DC circuit to be within a preset range of the voltage output by the main power module to the intermediate DC circuit when the train travels to the conversion area, so that the power supply of the traction module is switched from the main power module to the backup power module when the train travels to the power-free area.

[0092] For an introduction to the train power supply system, please refer to the above embodiments, which will not be elaborated in this application.

[0093] In order to solve the above technical problems, the present application also provides a train power supply device, please refer to Figure 7 , Figure 7 This is a structural block diagram of a train power supply device provided in this application, the device includes:

[0094] A memory 71, used for storing computer programs;

[0095] The processor 72 is used to implement the steps of the train power supply method as described above when storing the computer program.

[0096] For the introduction of the train power supply device, please refer to the above embodiment, and this application will not go into details here.

[0097] In order to solve the above-mentioned technical problems, the present application also provides a train, including a main power module, a backup power module, an intermediate DC circuit, an inverter module, a traction module and a train power supply device as described above, wherein the main power module is used to power the traction module through the intermediate DC circuit and the inverter module, and the backup power module is used to power the traction module through the intermediate DC circuit and the inverter module when the main power module cannot power the traction module.

[0098] For the introduction of the train, please refer to the above embodiment, and this application will not go into details here.

[0099] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0100] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A train power supply method, characterized in that: A processor applied to a train, the train further comprising a main power module, a backup power module, an intermediate DC circuit, an inverter module and a traction module, the main power module being used to supply power to the traction module through the intermediate DC circuit and the inverter module, the backup power module being used to supply power to the traction module through the intermediate DC circuit and the inverter module when the main power module cannot supply power to the traction module; the method comprising: Determine whether the train has traveled to a conversion zone according to the received flag signal, wherein the conversion zone is a preset area before the train travels to a power-free zone, and the power-free zone is an area where the main power source cannot supply power to the traction module; If so, the voltage outputted from the backup power module to the intermediate DC circuit is controlled to be within a preset range of the voltage outputted from the main power module to the intermediate DC circuit, so that when the train travels to the power-free zone, the power supply of the traction module is switched from the main power module to the backup power module; Controlling the voltage outputted from the backup power module to the intermediate DC circuit to be within a preset range of the voltage outputted from the main power module to the intermediate DC circuit, comprises: Acquire a first voltage range outputted from the main power module to the intermediate DC circuit; Controlling the voltage output by the backup power module to the intermediate DC circuit to be not less than a preset voltage of an upper limit value of the first voltage range; or, Acquire the current voltage currently outputted by the main power module to the intermediate DC circuit; Acquire a second voltage range output by the backup power module to the intermediate DC circuit; Determining whether the current voltage is greater than a lower limit value in the second voltage range; If so, the voltage output by the main power module to the intermediate DC circuit is controlled to be reduced to a preset voltage that is not greater than a lower limit value in the second voltage range.

2. The train power supply method according to claim 1, characterized in that: The backup power supply module includes a backup power supply and a first voltage conversion module; Controlling the voltage output by the backup power module to the intermediate DC circuit to be not less than a preset voltage of an upper limit value of the first voltage range includes: The first voltage conversion module is controlled to convert the voltage output by the backup power supply into a preset voltage that is not less than an upper limit value of the first voltage range.

3. The train power supply method according to claim 1, characterized in that: The main power supply module includes a main power supply and a second voltage conversion module; Controlling the voltage output by the main power module to the intermediate DC circuit to decrease to a preset voltage not greater than a lower limit value in the second voltage range includes: The second voltage conversion module is controlled to convert the voltage output by the main power supply into a preset voltage not greater than a lower limit value in the second voltage range.

4. The train power supply method according to any one of claims 1 to 3, characterized in that: Determining whether the train has traveled to the transfer area according to the received sign signal includes: A flag signal sent by a ground train system is received, and according to the flag signal, it is determined whether the train has traveled to the transfer area.

5. The train power supply method according to any one of claims 1 to 3, characterized in that: After the train travels to the power-free area, the method further includes: The traction power of the train is obtained, and the backup power module is controlled to adjust the voltage value output to the intermediate DC circuit according to its own power supply characteristics and the traction power.

6. A train power supply system, characterized in that: A processor applied to a train, the train further comprising a main power module, a backup power module, an intermediate DC circuit, an inverter module and a traction module, the main power module being used to supply power to the traction module through the intermediate DC circuit and the inverter module, the backup power module being used to supply power to the traction module through the intermediate DC circuit and the inverter module when the main power module cannot supply power to the traction module; the system comprising: an area determination unit, configured to determine whether the train has traveled to a transfer area according to a received flag signal, wherein the transfer area is a preset area before the train travels to a power-free area, and the power-free area is an area where the main power supply cannot supply power to the traction module; a voltage control unit, configured to control the voltage outputted from the backup power module to the intermediate DC circuit to be within a preset range of the voltage outputted from the main power module to the intermediate DC circuit when the train travels to the conversion area, so that the power supply of the traction module is switched from the main power module to the backup power module when the train travels to the power-free area; The voltage control unit is specifically used to obtain a first voltage range output by the main power module to the intermediate DC circuit; control the voltage output by the backup power module to the intermediate DC circuit to be not less than a preset voltage of the upper limit value of the first voltage range; or, obtain a current voltage currently output by the main power module to the intermediate DC circuit; obtain a second voltage range output by the backup power module to the intermediate DC circuit; determine whether the current voltage is greater than a lower limit value in the second voltage range; if so, control the voltage output by the main power module to the intermediate DC circuit to be reduced to a preset voltage not greater than the lower limit value in the second voltage range.

7. A train power supply device, characterized in that: include: Memory for storing computer programs; A processor, used to implement the steps of the train power supply method as described in any one of claims 1 to 5 when storing a computer program.

8. A train, characterized in that: It includes a main power module, a backup power module, an intermediate DC circuit, an inverter module, a traction module and the train power supply device as described in claim 7, wherein the main power module is used to power the traction module through the intermediate DC circuit and the inverter module, and the backup power module is used to power the traction module through the intermediate DC circuit and the inverter module when the main power module cannot power the traction module.

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