WO2023005078A1

WO2023005078A1 - Auxiliary power supply management system and method, and railway vehicle

Info

Publication number: WO2023005078A1
Application number: PCT/CN2021/133402
Authority: WO
Inventors: 王新; 胡正伟; 焦芳芳; 杨志月; 李如石; 吴凡
Original assignee: 中车唐山机车车辆有限公司
Priority date: 2021-07-28
Filing date: 2021-11-26
Publication date: 2023-02-02
Also published as: CN113659617A

Abstract

Provided in the embodiments of the present application are an auxiliary power supply management system and method, and a railway vehicle. The auxiliary power supply management system comprises a control module, a plurality of power supply management modules and a plurality of first switches, wherein the plurality of power supply management modules are sequentially arranged on a power supply bus, and one first switch is arranged between two adjacent power supply management modules; when it is detected that the auxiliary power supply management system meets a preset start condition, the control module controls the first switches to be in a switched-on state, and sequentially sends grid connection instructions to power supply management units according to a polling sequence; and if a grid connection success signal fed back by a target power supply management unit is received, the control module stops sending the grid connection instructions to power supply management units that are about to receive; and when it is detected that a power supply bus is powered on, the power supply management units that are about to receive control corresponding second switches to be in the switched-on state. By means of the auxiliary power supply management system provided in the present application, the time for time-divisional starting and grid connection of power supply management modules is shortened, thereby improving the running efficiency of a railway vehicle.

Description

Auxiliary power supply management system, method and rail vehicle

technical field

The present application relates to the technical field of rail vehicles, in particular, to an auxiliary power supply management system and method, and a rail vehicle.

Background technique

The power supply management module (ACU) is responsible for supplying power to all medium and low voltage loads in rail vehicles. It is one of the most important units of rail vehicles. Its working stability directly affects the normal operation of related loads on the medium voltage bus and low voltage bus of rail vehicles. A rail vehicle using grid-connected power supply technology is generally composed of multiple ACUs. After the rail vehicle is activated and has high-voltage input, it is necessary to implement time-sharing start-up grid-connection control for multiple ACUs to ensure stable power input for the medium-voltage AC busbar. And protect ACU and AC load.

The grid-connected power supply method of ACUs in existing rail vehicles is that multiple ACUs are controlled by themselves according to the location of the vehicle where they are installed, and start in sequence in time-sharing, and complete the grid-connected power supply. The specific implementation method is: set the start-up waiting time in the ACU control software. The ACU of the first vehicle first starts by detecting the state of the medium-voltage AC bus and other related conditions; the other ACUs detect the state of the medium-voltage AC bus and the three-phase The electrical phase sequence and other related conditions are started sequentially. After all ACUs are started, the grid connection is completed.

Problems existing in related technologies:

In the existing grid-connected power supply implementation method, since there is no signal interaction between multiple ACUs, the start-up waiting time set in the ACU control software needs to consider various abnormal conditions, resulting in a long time-consuming time for all ACUs to complete the time-sharing start-up grid connection process , which prolongs the time for rail vehicles to enter normal operating conditions and reduces the operating efficiency of rail vehicles.

Contents of the invention

The embodiment of the present application provides an auxiliary power supply management system, method and rail vehicle, which simplifies the grid connection process of the power supply management module and shortens the time-sharing start-up grid connection time of the power supply management module, so as to solve the problems existing in related technologies.

According to the first aspect of the embodiments of the present application, there is provided an auxiliary power supply management system, including a control module, multiple power supply management modules, and multiple first switches; each of the power supply management modules includes a power supply management unit and a first Two switches, the plurality of power supply management modules are sequentially arranged on the power supply bus, and a first switch is arranged between two adjacent power supply management modules; the control module is connected to each of the power supply management units , each of the power supply management units is connected to the power supply bus through the second switch;

The control module is configured to control the first switch to be in a closed state when it is detected that the auxiliary power supply management system meets a preset start-up condition;

The control module is further configured to sequentially send grid-connection instructions to the power supply management unit in a polling order when the first switch is in a closed state;

The control module is also configured to stop sending the grid connection instructions to the power supply management units to be received if the grid connection success signal fed back by the target power supply management unit is received during the process of sequentially sending the grid connection instructions to the multiple power supply management units. A grid-connected instruction; wherein, the target power supply management unit is a power supply management unit that receives the grid-connected instruction and controls the second switch to be in a closed state, and the power supply management unit to be received is a power supply management unit that has not received the grid-connected Command power supply management unit;

The to-be-received power supply management unit is configured to control the corresponding second switch to be in a closed state when it is detected that there is power on the power supply bus.

According to the second aspect of the embodiments of the present application, there is provided an auxiliary power supply management method, which is applied to a control module of an auxiliary power supply management system, and the auxiliary power supply management system further includes a plurality of power supply management modules and a plurality of first switches, Each of the power supply management modules includes a power supply management unit and a second switch, the plurality of power supply management modules are sequentially arranged on the power supply bus, and one of the first switches is arranged between two adjacent power supply management modules ; The control module is connected to each of the power supply management units, and each of the power supply management units is connected to the power supply bus through the second switch:

The control module controls the first switch to be in a closed state when detecting that the auxiliary power supply management system meets a preset start-up condition;

When the first switch is in the closed state, the control module sequentially sends grid-connection instructions to the power supply management unit in a polling sequence;

During the process of sequentially sending grid-connection instructions to the multiple power supply management units, if the control module receives a grid-connection success signal fed back by the target power supply management unit, it stops sending the grid-connection instructions to the power supply management units to be received. ; Wherein, the target power supply management unit is a power supply management unit that receives the grid-connection instruction and controls the second switch to be in a closed state, and the power supply management unit to be received is a power supply that has not received the grid-connection instruction snap-in.

According to a third aspect of the embodiments of the present application, a rail vehicle is provided, including the auxiliary power supply management system as described in the first aspect.

Using the auxiliary power supply management system, method and rail vehicle provided in the embodiment of the present application, the control module sends grid connection instructions to the power supply management units sequentially according to the polling order, and the control module sends grid connection instructions to multiple power supply management units in sequence During the process, if the grid connection success signal fed back by the target power supply management unit is received, it will stop sending the grid connection command to the power supply management unit to be received; when the power supply management unit to be received detects that there is power on the power supply bus, it will control the corresponding The second switch is in a closed state. It can be seen that in the process of controlling the grid connection by the control module, if one of the multiple power supply management units is successfully connected to the grid, the control module stops controlling the grid connection of the power supply management unit to be received, and the power supply management unit to be received detects the power-on of the power supply bus. In the event of a situation, the grid-connected action will be performed automatically. Compared with related technologies, the control module of this application only needs to control one of the power supply management units to be successfully connected to the grid, and does not need to control each power supply management unit to be successfully connected to the grid, which simplifies the grid connection process of the control module and reduces the need for The interactive steps of the power supply management unit shorten the time for the time-sharing start-up of the power supply management module and grid connection. Since the grid connection process of the control module is simplified, the error rate of the control process of the control module is reduced, thereby improving the operating efficiency of the rail vehicle.

Description of drawings

The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The schematic embodiments and descriptions of the application are used to explain the application and do not constitute an improper limitation to the application. In the attached picture:

Fig. 1 is the structural representation of a kind of rail vehicle provided by the embodiment of the present application;

FIG. 2 is a schematic structural diagram of an auxiliary power supply management system provided by an embodiment of the present application;

FIG. 3 is a schematic structural diagram of another auxiliary power supply management system provided by an embodiment of the present application;

FIG. 4 is a schematic structural diagram of another auxiliary power supply management system provided by an embodiment of the present application;

Fig. 5 is a schematic structural diagram of another auxiliary power supply management system provided by the embodiment of the present application;

FIG. 6 is a schematic structural diagram of another auxiliary power supply management system provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of another auxiliary power supply management system provided by an embodiment of the present application;

FIG. 8 is a schematic flowchart of a method for managing auxiliary power supply provided by an embodiment of the present application.

Icons: 100-rail vehicle; 110-auxiliary power supply management system; 111-control module; 112-power supply management module; 1121-power supply management unit; 1122-second switch; 113-first switch; 114-battery; 120-power supply bus bar; 130-load.

Detailed ways

In the process of implementing this application, the inventors found that in the existing grid-connected power supply implementation method, there are the following problems due to no signal interaction between multiple ACUs:

The first problem is that the start-up waiting time set in the ACU control software needs to consider various abnormal working conditions, resulting in a long time-consuming time for all ACUs to complete the time-sharing start-up and grid-connection process, which prolongs the time for rail vehicles to enter normal operating conditions and reduces the Efficiency of rail vehicles.

The second problem is that when a short-circuit fault occurs, it will affect the grid-connected power supply control of all ACUs, as well as the normal operation of ACUs and loads. It is necessary to manually eliminate the cause of the fault before implementing normal grid-connected control, resulting in the train not running normally.

The third problem is that when there is an abnormal working condition where the battery voltage is too low, it is necessary to first perform low-voltage start control on the ACU connected to the battery to complete the rapid charging control of the battery. At this time, it is necessary to implement manual isolation control on other ACUs to prevent other ACUs from starting during the low-voltage startup process of the ACU. After the battery voltage recovers, the isolated ACU needs to be manually restored before the normal time-sharing start-up and grid-connection control can be implemented, which makes the ACU start-up control process cumbersome when the battery voltage is abnormal.

In view of the above problems, an auxiliary power supply management system, method and rail vehicle are provided in the embodiment of the present application. The control module centrally manages and controls multiple power supply management modules and multiple first switches, which can simplify the grid connection process and shorten the The power supply management module starts the grid-connected time in time-sharing, which improves the operating efficiency of rail vehicles. At the same time, the first switch is set between multiple power supply management modules, which can realize the isolation of single or multiple faulty power supply management modules, so as to ensure that the rail vehicle can supply power to the greatest extent when there is a fault in the power supply management module. Ensure driving safety. Under short-circuit fault conditions, the efficiency of grid connection is improved, and the operating efficiency of rail vehicles is improved. Simplify the start-up process of the power supply management module under abnormal battery low voltage conditions.

In order to make the technical solutions and advantages in the embodiments of the present application clearer, the exemplary embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only part of the embodiments of the present application, and Not an exhaustive list of all embodiments. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

Please refer to FIG. 1 , which is a schematic structural diagram of a rail vehicle 100 provided by an embodiment of the present application. The rail vehicle 100 includes an auxiliary power supply management system 110 and a load 130 . The auxiliary power supply management system 110 supplies power to the load 130 through a power supply bus 120 . Among them, the load 130 is mainly the medium and low voltage load on the rail vehicle 100; the auxiliary power supply management system 110 performs grid-connection operation after the rail vehicle 100 is activated and has a high-voltage input, so as to ensure stable power input for the power supply bus 120.

Please refer to FIG. 2, the auxiliary power supply management system 110 shown in FIG. 2 includes a control module 111, a plurality of power supply management modules 112 and a plurality of first switches 113; each power supply management module 112 includes a power supply management unit 1121 and a second switch 1122, a plurality of power supply management modules 112 are sequentially arranged on the power supply bus 120, and a first switch 113 is arranged between two adjacent power supply management modules 112; the control module 111 is connected to each power supply management unit 1121, and each power supply management The units 1121 are all connected to the power supply bus 120 through the second switch 1122 .

It should be understood that the control module 111 is used to control the first switch 113 to be in the closed state when it is detected that the auxiliary power supply management system 110 meets the preset startup condition; the control module 111 is also used to control the first switch 113 to be in the closed state. Next, send grid-connection commands to the power supply management unit 1121 sequentially in accordance with the polling order; the control module 111 is also used to send grid-connection commands to multiple power supply management units 1121 in sequence, if receiving feedback from the target power supply management unit 1121 grid connection success signal, stop sending the grid connection instruction to the power supply management unit 1121 to be received; wherein, the target power supply management unit 1121 is the power supply management unit 1121 that receives the grid connection instruction and controls the second switch 1122 to be in a closed state The power supply management unit 1121 to be received is the power supply management unit 1121 that has not received the grid connection instruction; the power supply management unit 1121 to be received is used to control the corresponding second switch 1122 to be closed when it detects that there is power on the power supply bus 120 state.

In this embodiment, for ease of understanding, four power supply management modules 112 are set as an example for illustration, and the number can be set according to actual conditions, which is not limited here.

Please refer to FIG. 3 , the four power supply management modules 112 are respectively the first power supply management module 112 , the second power supply management module 112 , the third power supply management module 112 and the fourth power supply management module 112 , correspondingly, a plurality of first switches 113 There are three sets, which are respectively the first switch a, the first switch b and the first switch c. The first power supply management module 112 , the second power supply management module 112 , the third power supply management module 112 and the fourth power supply management module 112 are sequentially arranged on the power supply bus 120 , between the first power supply management module 112 and the second power supply management module 112 A first switch a is set, a first switch b is set between the second power supply management module 112 and the third power supply management module 112, and a first switch c is set between the third power supply management module 112 and the fourth power supply management module 112 .

The first power supply management module 112 includes a first power supply management unit 1121 and a second switch a, the second power supply management module 112 includes a second power supply management unit 1121 and a second switch b, and the third power supply management module 112 includes a third power supply management unit 1121 and a second switch c. The fourth power supply management module 112 includes a fourth power supply management unit 1121 and a second switch d. The first power supply management unit 1121 is connected to the first switch a through the second switch a and the power supply bus 120, and the second power supply management unit 1121 is connected to the first switch a and the first switch b through the second switch b and the power supply bus 120. The third power supply management unit 1121 is connected to the first switch b and the first switch c through the second switch c and the power supply bus 120 , and the fourth power supply management unit 1121 is connected to the first switch c through the second switch d.

The control module 111 is connected to the first power supply management unit 1121, the second power supply management unit 1121, the third power supply management unit 1121 and the fourth power supply management unit 1121, and the control module 111 is also connected to the first switch a, the first switch b and the second power supply management unit 1121. A switch c is connected.

It should be understood that the control module 111 is configured to control the first switch a, the first switch b and the first switch c to be in the closed state when the preset starting condition is satisfied.

The preset starting conditions include: each second switch 1122 is in an off state, each power supply management unit 1121 does not feed back an external short-circuit fault, the control module 111 does not generate a short-circuit detection command, and each power supply management unit 1121 does not generate grid connection A success signal, the control module 111 does not generate an independent power supply instruction, and at least one power supply management unit 1121 generates a start complete signal. Wherein, the startup complete signal may indicate that the internal AC startup of the power supply management module 112 is completed.

When the first switch a, the first switch b, and the first switch c are all in the closed state, the control module 111 sequentially sends grid-connection instructions to the four power supply management units 1121 in a polling order. It can be understood that the polling order can be set as the order of the first power supply management unit 1121, the second power supply management unit 1121, the third power supply management unit 1121 and the fourth power supply management unit 1121, that is, the control module 111 sends the first power supply management unit sequentially 1121. The second power supply management unit 1121, the third power supply management unit 1121, and the fourth power supply management unit 1121 send a grid connection instruction.

The control module 111 is also used to stop sending grid-connection commands to the power supply management units 1121 to be received if the grid-connection success signal fed back by the target power supply management unit 1121 is received during the process of sequentially sending grid-connection instructions to multiple power supply management units 1121. instruction; wherein, the target power supply management unit 1121 is the power supply management unit 1121 that receives the grid connection instruction and controls the second switch 1122 to be in the closed state, and the power supply management unit 1121 to be received is the power supply management unit 1121 that has not received the grid connection instruction.

It should be understood that the control module 111 first sends a grid connection command to the first power supply management unit 1121, and if the first power supply management unit 1121 does not receive a feedback grid connection success signal within a preset time, it will send a grid connection command to the second power supply management unit 1121 in sequence. Send the grid connection command, if the grid connection success signal fed back by the second power supply management unit 1121 is received within the preset time, the polling ends, and the grid connection command to the third power supply management unit 1121 and the fourth power supply management unit 1121 is stopped. Wherein, the third power supply management unit 1121 and the fourth power supply management unit 1121 are the power supply management units 1121 to be received, and the second power supply management unit 1121 is the target power supply management unit 1121 . The precondition for the second power supply management unit 1121 to generate the grid connection success signal is that the second power supply management unit 1121 controls the second switch b to be in the closed state according to the grid connection instruction. The reason why the first power supply management unit 1121 does not generate a grid connection success signal is that the second switch a has a closing fault, that is, the first power supply management unit 1121 cannot control the second switch a to be in the closed state according to the grid connection command.

The to-be-received power supply management unit 1121 is configured to control the corresponding second switch 1122 to be in a closed state when it is detected that there is power on the power supply bus 120 .

It should be understood that since all the first switches 113 are in the closed state, the power supply bus 120 where the four power supply management modules 112 are located is a path. When the second power supply management unit 1121 controls the second switch b to be in the closed state, the second power supply management unit 1121 will provide power input to the power supply bus 120, and the third power supply management unit 1121 and the fourth power supply management unit 1121 detect the power supply When there is power on the bus bar 120 , the second switch c and the second switch d are controlled to be in the closed state, and the grid connection process ends so far.

Wherein, if the second power supply management unit 1121 provides AC power to the power supply bus 120, the third power supply management unit 1121 and the fourth management unit will automatically start grid-connected when detecting that the phase sequence of the AC power on the power supply bus 120 is consistent, That is, the second switch c and the second switch d are automatically controlled to be in a closed state.

In the process of grid-connection, if not all the first switches 113 are closed when the auxiliary power supply management system 110 meets the preset start-up conditions, that is, when the first switch 113 has a closing fault, the grid-connection operation can also be performed. The principle is: the control module 111 is also used to determine the independent power supply management unit 1121 according to the first switch 113 that has a closed fault when the first switch 113 has a closed fault; 1121 Disconnect the connected power supply management unit 1121; the control module 111 is also used to send an independent power supply instruction to the independent power supply management unit 1121; the independent power supply management unit 1121 is used to control the corresponding second switch 1122 to be in the closed state according to the independent power supply instruction.

The control module 111 centrally manages and controls multiple power supply management modules 112 and multiple first switches 113 , which can simplify the grid connection process, shorten the power supply management module 112 time-sharing start-up grid connection time, and improve the operating efficiency of the rail vehicle 100 . At the same time, the first switch 113 is set between multiple power supply management modules 112, which can realize the isolation of single or multiple faulty power supply management modules 112, so as to ensure that the rail vehicle 100 can operate under the condition that the power supply management module 112 fails. Maximum power supply to ensure driving safety.

The control module 111 is also used to determine the grid-connected power supply management unit 1121 according to the first switch 113 that has a closed fault; wherein, the grid-connected power supply management unit 1121 is a power supply management unit 1121 that is kept connected with other power supply management units 1121; the control module 111 also It is used to sequentially send grid-connected commands to the grid-connected power supply management unit 1121 according to the polling sequence; the control module 111 is also used to send grid-connected commands to the grid-connected power supply management unit 1121 sequentially, if the target grid-connected power supply The grid-connection success signal fed back by the management unit 1121 stops sending the grid-connection command to the grid-connection power management unit 1121 to be received; wherein, the target grid-connection power supply management unit 1121 controls the second switch 1122 to be in the closed state after receiving the grid-connection command grid-connected power supply management unit 1121, the grid-connected power supply management unit 1121 to be received is the grid-connected power supply management unit 1121 that has not received the grid-connected command; the grid-connected power supply management unit 1121 to be received is used to In the case of , control the corresponding second switch 1122 to be in the closed state.

It should be understood that, as shown in FIG. 4 , if the first switch a has a closing fault, that is, the first switch a cannot be closed, while the first switch b and the first switch c are in the closed state. Then the first power supply management unit 1121 is an independent power supply management unit 1121 , and the second power supply management unit 1121 , the third power supply management unit 1121 and the fourth power supply management unit 1121 are grid-connected power supply management units 1121 . For the first power supply management unit 1121, the control module 111 sends an independent power supply instruction to the first power supply management unit 1121, sends and net command.

The first power supply management unit 1121 controls the second switch a to be in a closed state according to the independent power supply instruction. The control module 111 first sends a grid connection command to the second power supply management unit 1121 according to the polling sequence, and if the second power supply management unit 1121 does not feed back a grid connection success signal to the control module 111 within a preset time. The control module 111 sends a grid connection command to the third power supply management unit 1121 according to the polling sequence. If the third power supply management unit 1121 feeds back a grid connection success signal to the control module 111 within a preset time, the control module 111 stops supplying power to the fourth power supply management unit 1121. The management unit 1121 sends a grid connection instruction.

Wherein, the third power supply management unit 1121 is the target grid-connected power supply management unit 1121 , and the fourth power supply management unit 1121 is the grid-connected power supply management unit 1121 to be received.

Since both the first switch b and the first switch c are in the closed state, the power supply bus 120 where the second power supply management module 112 , the third power supply management module 112 and the fourth power supply management module 112 are located is a path. When the third power supply management unit 1121 controls the second switch c to be in the closed state, the third power supply management unit 1121 will provide power input to the power supply bus 120 , and the fourth power supply management unit 1121 detects that there is power on the power supply bus 120 Next, the second switch d is controlled to be in the closed state, and the grid-connection process ends so far.

As shown in FIG. 5 , if the first switch b has a closing fault, that is, the first switch b cannot be closed, while the first switch a and the first switch c are in a closed state. Then the first power supply management unit 1121 , the second power supply management unit 1121 , the third power supply management unit 1121 and the fourth power supply management unit 1121 are all grid-connected power supply management units 1121 . Only the first power supply bus 120 where the first power supply management unit 1121 and the second power supply management unit 1121 are located is in the conducting state, and the second power supply bus 120 where the third power supply management unit 1121 and the fourth power supply management unit 1121 are located is in the conducting state , while the first power supply bus 120 and the second power supply bus 120 are disconnected, that is, the first switch b isolates the power supply bus 120 into two lines, the first power supply bus 120 and the second power supply bus 120 .

For this situation, the control module 111 is divided into two logical control parts, that is, the control module 111 generates the first grid connection command and the second grid connection command at the same time, and sends the first power supply management unit 1121 and the second power supply management unit 1121 and the second power supply management unit according to the polling sequence. The unit 1121 sends the first grid connection instruction, and sends the second grid connection instruction to the third power supply management unit 1121 and the fourth power supply management unit 1121 in a polling order.

The control module 111 first sends the first grid-connection command to the first power supply management unit 1121 according to the polling sequence. The second power supply management unit 1121 sends the first grid connection instruction. Wherein, the first power supply management unit 1121 is the target grid-connected power supply management unit 1121 , and the second power supply management unit 1121 is the grid-connected power supply management unit 1121 to be received.

Since the first switch a is in the closed state, the first power supply bus 120 where the first power supply management module 112 and the second power supply management module 112 are located is a path. When the first power supply management unit 1121 controls the second switch a to be in the closed state, the first power supply management unit 1121 will provide power input to the first power supply bus 120 , and the second power supply management unit 1121 detects that the first power supply bus 120 When there is electricity, the second switch b is controlled to be in the closed state, and the grid-connection process of the first power supply management module 112 and the second power supply management module 112 is ended.

At the same time, the control module 111 first sends the second grid connection command to the third power supply management unit 1121 according to the polling sequence. Stop sending the second grid connection instruction to the fourth power supply management unit 1121 . Wherein, the third power supply management unit 1121 is the target grid-connected power supply management unit 1121 , and the fourth power supply management unit 1121 is the grid-connected power supply management unit 1121 to be received.

Since the first switch c is in the closed state, the second power supply bus 120 where the third power supply management module 112 and the fourth power supply management module 112 are located is a path. When the third power supply management unit 1121 controls the second switch c to be in the closed state, the third power supply management unit 1121 will provide power input to the second power supply bus 120 , and the fourth power supply management unit 1121 detects that the second power supply bus 120 When there is power, the second switch d is controlled to be in the closed state, and the grid-connection process of the third power supply management module 112 and the fourth power supply management module 112 is ended.

As shown in FIG. 6 , if both the first switch a and the first switch b have a closing fault, that is, the first switch a and the first switch b cannot be closed, while the first switch c is in a closed state. Then the first power supply management unit 1121 and the second power supply management unit 1121 are independent power supply management units 1121 , and the third power supply management unit 1121 and the fourth power supply management unit 1121 are grid-connected power supply management units 1121 . For the first power supply management unit 1121 and the second power supply management unit 1121, the control module 111 sends an independent power supply instruction to the first power supply management unit 1121, sends and net command.

As shown in FIG. 7 , if the first switch a, the first switch b, and the first switch c all have closing faults, that is, the first switch a, the first switch b, and the first switch c cannot be closed. Then the first power supply management unit 1121 , the second power supply management unit 1121 , the third power supply management unit 1121 and the fourth power supply management unit 1121 are independent power supply management units 1121 . The control module 111 sends independent power supply instructions to the first power supply management unit 1121 , the second power supply management unit 1121 , the third power supply management unit 1121 and the fourth power supply management unit 1121 respectively.

Wherein, the situation that the first switch 113 has a closed fault is not fully listed here, and there are other situations, which will not be described here.

For the second problem of the related technology, the embodiment of the present application also proposes that the control module 111 is used to send a short-circuit detection instruction to the power supply management unit 1121 when the trigger condition of the short-circuit fault is met; The detection instruction performs short-circuit fault detection, and sends the detection result to the control module 111; the control module 111 is also used to continue to send grid-connected instructions to the power supply management unit 1121 in turn according to the polling sequence when the detection result is no fault; the control module 111 is also used to generate a fault prompt signal when the detection result is a fault.

It should be understood that the short-circuit fault trigger condition includes that the second switch 1122 corresponding to the power supply management unit 1121 is in the open state, the first switch 113 between two adjacent power supply management units 1121 is in the closed state, and any power supply management unit 1121 generates an external Short circuit fault information.

In other words, the power supply management unit 1121 that the control module 111 sends the short-circuit detection command is the grid-connected power supply management unit 1121 . The external short-circuit fault information generated by any power supply management unit 1121 may be generated because the power supply management unit 1121 detects a potential short-circuit fault. Potential short-circuit faults are uncertain whether they occur, and whether they are external short-circuit faults or internal short-circuit faults.

Since multiple power supply management units 1121 perform short circuit fault detection at the same time, the pantograph-catenary current will be insufficient and the top grid fault will occur. Therefore, the present application can also adopt that after receiving the short-circuit detection instruction, the multiple power supply management units 1121 perform short-circuit fault detection sequentially according to the default sequence, and send the detection results to the control module 111 .

The short-circuit fault detection includes internal short-circuit detection and external short-circuit detection, and the power supply management unit 1121 is also used to perform internal short-circuit detection according to the short-circuit detection instruction; the control module 111 is also used to send independent Power supply instruction; the power supply management unit 1121 is also used to control the corresponding second switch 1122 to be in the closed state according to the independent power supply instruction; the power supply management unit 1121 is also used to perform external short circuit detection when the corresponding second switch 1122 is in the closed state ; The power supply management unit 1121 is also configured to send external short-circuit fault information to the control module 111 when an external short-circuit fault is detected.

It should be understood that after the power supply management unit 1121 receives the short-circuit detection instruction, it first performs internal short-circuit detection, and if no internal short-circuit fault is detected, it sends internal detection normal information to the control module 111, and the control module 111 reports to the power supply management unit according to the internal detection normal information. 1121 sends an independent power supply instruction, and the power supply management unit 1121 controls the corresponding second switch 1122 to be in the closed state according to the independent power supply instruction, and performs external short circuit detection, and sends an external short circuit fault to the control module 111 when an external short circuit fault is detected information.

If the power supply management unit 1121 detects an internal short-circuit fault during internal short-circuit detection, it sends internal short-circuit fault information to the control module 111 and stops short-circuit detection. If the power supply management unit 1121 does not detect an external short-circuit fault when performing external short-circuit detection, it will send external detection normal information to the control module 111, and the control module 111 will send a grid-connected command according to the external detection normal information to re-execute the grid-connected power supply process .

The application can not only detect the external short-circuit fault, but also locate the location of the external short-circuit fault. The implementation principle is: the control module 111 is also used to control the first switch 113 connected to the power supply management unit 1121 to be in the off state according to the external short circuit fault information.

It should be understood that when all the first switches 113 are in the closed state, the power supply management unit 1121 detects that there is an external short-circuit fault. Know exactly where the external short circuit fault occurred. Therefore, the first switch 113 is turned off, and each power supply management unit 1121 is an independent unit connected to the first switch 113 and the power supply bus 120. If one or more power supply management units 1121 continue to feed back external short-circuit fault information, it means The independent unit where the power supply management unit 1121 is located is the location where the external short circuit fault is sent.

After determining the power supply management unit 1121 that has an external short-circuit fault, the first switch 113 connected to the power supply management unit 1121 that has an external short-circuit fault continues to be in an off state, so as to isolate the power supply management unit 1121 that has an external short-circuit fault. At the same time, The power supply management unit 1121 that generates an external short-circuit fault controls the corresponding second switch 1122 to be in an off state. The control module 111 then sends a grid connection command or an independent power supply command to the power supply management unit 1121 without a short circuit fault, and continues the grid connection process.

It can be seen that under the short-circuit fault condition, the power supply management unit 1121 that has a short-circuit fault is isolated, and the power supply management unit 1121 without a short-circuit fault continues the grid connection process, which can improve the efficiency of grid connection success and improve the failure operation of the rail vehicle 100. ability.

For the third problem of the related technology, the embodiment of the present application also proposes that the auxiliary power supply management system 110 also includes a plurality of batteries 114, and the plurality of power supply management units 1121 are connected to the plurality of batteries 114 in one-to-one correspondence, and the control module 111 It is connected with each storage battery 114 .

The control module 111 is also used to control the first switch 113 connected to the low-voltage power supply management unit 1121 to be in an off state when the battery 114 feeds back low-voltage information, and to send an independent power supply instruction to the low-voltage power supply management unit 1121; wherein, the low-voltage power supply The management unit 1121 is a power supply management unit 1121 connected to the low-voltage battery 114, and the low-voltage battery 114 is the battery 114 that feeds back low-voltage information; the low-voltage power supply management unit 1121 is used to control the corresponding second switch 1122 to be in a closed state according to an independent power supply instruction.

It should be understood that when any storage battery 114 feeds back low-voltage information, the control module 111 controls the first switch 113 connected to the low-voltage power supply management unit 1121 to be in the off state, and at the same time sends an independent power supply instruction to the low-voltage power supply management unit 1121, which can realize low-voltage power supply management. The storage battery 114 is charged urgently, and at the same time, no grid connection command or independent power supply command is issued to other power supply management units 1121 , and the first switch 113 is not closed, so as to ensure fast charging of the low-voltage battery 114 and improve the working efficiency of the rail vehicle 100 .

In this embodiment, the control module 111 may be a newly added module, or a vehicle controller of the rail vehicle 100 may be used as the control module 111, which is not limited here and may be set according to actual conditions.

Next, on the basis of the control module 111 shown in FIG. 2 , this embodiment of the present application provides an auxiliary power supply management method, please refer to FIG. 8 , which is a schematic flowchart of an auxiliary power supply management method provided by the embodiment of the present application. The auxiliary power supply management method may include the following steps:

S201. The control module controls the first switch to be in a closed state when detecting that the auxiliary power supply management system meets a preset starting condition.

S202. When the first switch is in the closed state, the control module sequentially sends grid-connection instructions to the power supply management unit according to the polling sequence.

S203. During the process of sequentially sending grid-connection instructions to multiple power supply management units, if the control module receives a grid-connection success signal fed back by the target power supply management unit, stop sending the grid-connection instructions to the power supply management units to be received.

It should be understood that the above-mentioned control module 111 can realize the content in S201-S203, and of course other functions of the above-mentioned control module 111 are also the content of the auxiliary power supply management method, which can be referred to the function description of the above-mentioned control module 111, and will not be repeated here.

In summary, the present application provides an auxiliary power supply management system, method and rail vehicle. The auxiliary power supply management system includes a control module, a plurality of power supply management modules and a plurality of first switches; each power supply management module includes a power supply management unit and a For the second switch, a plurality of power supply management modules are sequentially arranged on the power supply busbar, and a first switch is arranged between two adjacent power supply management modules; the control module is connected to each power supply management unit, and each power supply management unit is connected through the first power supply management unit. The second switch is connected to the power supply bus; the control module is used to control the first switch to be in the closed state when it is detected that the auxiliary power supply management system meets the preset start-up conditions; the control module is also used to control the first switch to be in the closed state , according to the polling sequence to send grid-connected commands to the power supply management unit in turn; the control module is also used to send grid-connected commands to multiple power supply management units in sequence, if the grid-connected success signal fed back by the target power supply management unit is received, Then stop sending the grid-connection command to the power supply management unit to be received; wherein, the target power supply management unit is the power supply management unit that receives the grid-connection command and controls the second switch to be in the closed state, and the power supply management unit to be received has not received the grid-connection command The power supply management unit; the power supply management unit to be received is used to control the corresponding second switch to be in the closed state when it is detected that there is power on the power supply bus.

In the process of controlling the grid connection by the control module, if one of the multiple power supply management units is successfully connected to the grid, the control module stops controlling the grid connection of the power supply management unit to be received, and the power supply management unit to be received detects the power-on status of the power supply bus, Automatically connect to the grid. Compared with related technologies, the control module of this application only needs to control one of the power supply management units to be successfully connected to the grid, and does not need to control each power supply management unit to be successfully connected to the grid. The interactive steps of the power supply management unit shorten the time for the time-sharing start-up of the power supply management module and grid connection. Since the grid connection process of the control module is simplified, the error rate of the control process of the control module is reduced, thereby improving the operating efficiency of the rail vehicle. At the same time, the first switch is set between multiple power supply management modules, which can realize the isolation of single or multiple faulty power supply management modules, so as to ensure that the rail vehicle can supply power to the greatest extent when there is a fault in the power supply management module. Ensure driving safety.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowcharts and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

While preferred embodiments of the present application have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, the appended claims are intended to be construed to cover the preferred embodiment and all changes and modifications which fall within the scope of the application.

Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

An auxiliary power supply management system, characterized in that it includes a control module, a plurality of power supply management modules and a plurality of first switches; each of the power supply management modules includes a power supply management unit and a second switch, and the plurality of power supply management The modules are sequentially arranged on the power supply bus, and the first switch is arranged between two adjacent power supply management modules; the control module is connected to each of the power supply management units, and each of the power supply management units is connected to the power supply bus through the second switch;

The control module is configured to control the first switch to be in a closed state when it is detected that the auxiliary power supply management system meets a preset start-up condition;

The control module is further configured to sequentially send grid-connection instructions to the power supply management unit in a polling order when the first switch is in a closed state;

The control module is also configured to stop sending the grid connection instructions to the power supply management units to be received if the grid connection success signal fed back by the target power supply management unit is received during the process of sequentially sending the grid connection instructions to the multiple power supply management units. A grid-connected instruction; wherein, the target power supply management unit is a power supply management unit that receives the grid-connected instruction and controls the second switch to be in a closed state, and the power supply management unit to be received is a power supply management unit that has not received the grid-connected Command power supply management unit;

The to-be-received power supply management unit is configured to control the corresponding second switch to be in a closed state when it is detected that there is power on the power supply bus.
The auxiliary power supply management system according to claim 1, wherein the preset starting conditions include: each of the second switches is in an off state, and each of the power supply management units does not feed back an external short-circuit fault , the control module does not generate a short-circuit detection instruction, each of the power supply management units does not generate the grid connection success signal, the control module does not generate an independent power supply instruction, and at least one of the power supply management units generates a start-up complete signal.
The auxiliary power supply management system according to claim 1, wherein the control module is further configured to determine an independent power supply management unit according to the first switch with a closure failure when the first switch has a closure failure; Wherein, the independent power supply management unit is a power supply management unit disconnected from other power supply management units;

The control module is also used to send an independent power supply instruction to the independent power supply management unit;

The independent power supply management unit is configured to control the corresponding second switch to be in a closed state according to the independent power supply instruction.
The auxiliary power supply management system according to claim 1, wherein the control module is further configured to determine the grid-connected power supply management unit according to the first switch having a closing fault when the first switch has a closing fault ; Wherein, the grid-connected power supply management unit is a power supply management unit that maintains connection with other power supply management units;

The control module is further configured to sequentially send the grid-connected instructions to the grid-connected power supply management unit according to a polling sequence;

The control module is further configured to stop supplying grid-connected power supply management units to be received if a grid-connected success signal fed back by the target grid-connected power supply management unit is received during the process of sequentially sending grid-connected power supply management units to the grid-connected power supply management unit. The unit sends the grid-connected command; wherein, the target grid-connected power supply management unit is a grid-connected power supply management unit that receives the grid-connected command and controls the second switch to be in a closed state, and the grid-connected power supply to be received The management unit is a grid-connected power supply management unit that has not received the grid-connected command;

The to-be-received grid-connected power supply management unit is configured to control the corresponding second switch to be in a closed state when detecting that there is power on the power supply bus.
The auxiliary power supply management system according to claim 1 or 4, wherein the control module is configured to send a short-circuit detection instruction to the power supply management unit when a short-circuit fault trigger condition is met;

The power supply management unit is configured to perform short-circuit fault detection according to the short-circuit detection instruction, and send a detection result to the control module;

The control module is further configured to continue to sequentially send grid-connection instructions to the power supply management unit according to the polling sequence if the detection result is no fault;

The control module is also used to generate a fault prompt signal when the detection result is a fault.
The auxiliary power supply management system according to claim 5, wherein the short-circuit fault trigger condition includes that the second switch corresponding to the power supply management unit is in an off state, and the power supply management unit between two adjacent power supply management units The first switch is in a closed state and any one of the power supply management units generates external short-circuit fault information.
The auxiliary power supply management system according to claim 5, wherein the short-circuit fault detection includes internal short-circuit detection and external short-circuit detection;

The power supply management unit is also used to perform internal short circuit detection according to the short circuit detection instruction;

The control module is also used to send an independent power supply instruction to the power supply management unit when there is no internal short circuit fault;

The power supply management unit is further configured to control the corresponding second switch to be in a closed state according to the independent power supply instruction;

The power supply management unit is further configured to detect an external short circuit when the corresponding second switch is in a closed state;

The power supply management unit is further configured to send external short-circuit fault information to the control module when an external short-circuit fault is detected.
The auxiliary power supply management system according to claim 7, wherein the control module is further configured to control the first switch connected to the power supply management unit to be in an off state according to the external short circuit fault information.
The auxiliary power supply management system according to claim 1, characterized in that, the auxiliary power supply management system further includes a plurality of batteries, and the plurality of power supply management units are connected to the plurality of batteries in one-to-one correspondence, and the control module connected to each of said batteries;

The control module is also used to control the first switch connected to the low-voltage power supply management unit to be in an off state when the storage battery feeds back low-voltage information, and send an independent power supply instruction to the low-voltage power supply management unit; wherein, the The low-voltage power supply management unit is a power supply management unit connected to a low-voltage battery, and the low-voltage battery is a battery that feeds back low-voltage information;

The low-voltage power supply management unit is configured to control the corresponding second switch to be in a closed state according to the independent power supply instruction.
An auxiliary power supply management method, characterized in that it is applied to a control module of an auxiliary power supply management system, and the auxiliary power supply management system further includes a plurality of power supply management modules and a plurality of first switches, and each of the power supply management modules includes A power supply management unit and a second switch, the plurality of power supply management modules are sequentially arranged on the power supply bus, and one of the first switches is arranged between two adjacent power supply management modules; the control module and each of the power supply management modules The above power supply management units are all connected, and each of the power supply management units is connected to the power supply bus through the second switch:

The control module controls the first switch to be in a closed state when detecting that the auxiliary power supply management system meets a preset start-up condition;

When the first switch is in the closed state, the control module sequentially sends grid-connection instructions to the power supply management unit in a polling order;

In the process of sequentially sending grid-connection instructions to the multiple power supply management units, if the control module receives a grid-connection success signal fed back by the target power supply management unit, stop sending the grid-connection instructions to the power supply management units to be received ; Wherein, the target power supply management unit is a power supply management unit that receives the grid-connection instruction and controls the second switch to be in a closed state, and the power supply management unit to be received is a power supply that has not received the grid-connection instruction snap-in.
The auxiliary power supply management method according to claim 10, wherein the preset starting conditions include: each of the second switches is in an off state, and each of the power supply management units is feedbacking an external short-circuit fault , the control module does not generate a short-circuit detection instruction, each of the power supply management units does not generate the grid connection success signal, the control module does not generate an independent power supply instruction, and at least one of the power supply management units generates a start-up complete signal.
A rail vehicle, characterized by comprising the auxiliary power supply management system according to any one of claims 1-9.