CN-117141525-B - Rail vehicle traction control method and device and rail vehicle

CN117141525BCN 117141525 BCN117141525 BCN 117141525BCN-117141525-B

Abstract

A method and a device for controlling traction of a railway vehicle and the railway vehicle comprise the steps of obtaining a traction instruction, load information of each carriage, allowable discharge power feedback information of a power battery of each carriage and equipment power consumption power feedback information of each carriage, calculating required traction power of each carriage based on the traction instruction and the load information, calculating available traction power of each carriage based on the allowable discharge power feedback information and the equipment power consumption power feedback information, and determining whether power supply and shortage exists in any carriage and/or the whole vehicle based on the required traction power and the available traction power of each carriage, and executing at least one of a first measure, a second measure and a third measure when power supply and shortage exists. The scheme can ensure that the vehicle is smoothly towed to run under the extreme fault working condition, and the vehicle can be cleaned to the next station and returned to the warehouse for maintenance in time.

Inventors

LIU SAIWU
CHENG ZHIHUA
YANG LINA
CHEN YANJUN

Assignees

比亚迪股份有限公司

Dates

Publication Date: 20260505
Application Date: 20220524

Claims (11)

1. A method of traction control for a rail vehicle, the method comprising: Acquiring a traction instruction, load information of each carriage, allowable discharge power feedback information of a power battery of each carriage and equipment power consumption power feedback information of each carriage; Calculating the required traction power of each carriage based on the traction instruction and the load information, and calculating the available traction power of each carriage based on the allowable discharge power feedback information and the equipment power consumption power feedback information; Determining whether power supply and shortage of any carriage and/or the whole vehicle exist or not based on the required traction power and the available traction power of each carriage, wherein the mode of determining whether power supply and shortage exists or not comprises judging each carriage firstly and then judging each carriage, judging each carriage firstly and then judging the whole vehicle, judging only the whole vehicle or judging only each carriage; The first measure comprises controlling the power batteries of at least two carriages to be communicated, the second measure comprises controlling at least part of unnecessary power consumption equipment in at least one carriage to be closed according to the preset priority of the unnecessary power consumption equipment in each carriage, and/or taking the carriage with the available traction power smaller than the required traction power as a target carriage and controlling at least part of unnecessary power consumption equipment in the target carriage to be closed, and the third measure comprises controlling the required traction power of at least one carriage to be reduced.
2. The method of claim 1, wherein the determining whether there is a supply-to-demand for power for any car and/or whole car based on the demanded traction power and the available traction power for each car, and when there is a supply-to-demand for power, performing at least one of a first measure, a second measure, and a third measure, comprises: Calculating the required traction power of the whole vehicle and the available traction power of the whole vehicle based on the required traction power and the available traction power of each carriage; Determining whether the available traction power of the whole vehicle is smaller than the required traction power of the whole vehicle; When the available traction power of the whole vehicle is smaller than the required traction power of the whole vehicle, executing the second measure and/or the third measure; When the available traction power of the whole vehicle is not less than the required traction power of the whole vehicle, determining whether the available traction power of each carriage is less than the required traction power; And when the available traction power of any carriage is smaller than the required traction power, executing the first measure.
3. The method of claim 1, wherein the determining whether there is a supply-to-demand for power for any car and/or whole car based on the demanded traction power and the available traction power for each car, and when there is a supply-to-demand for power, performing at least one of a first measure, a second measure, and a third measure, comprises: Determining whether the available traction power of each car is less than the required traction power; When the available traction power of any carriage is smaller than the required traction power, calculating the required traction power of the whole vehicle and the available traction power of the whole vehicle based on the required traction power and the available traction power of each carriage, and determining whether the available traction power of the whole vehicle is smaller than the required traction power of the whole vehicle; When the available traction power of the whole vehicle is not smaller than the required traction power of the whole vehicle, executing the first measure; And when the available traction power of the whole vehicle is smaller than the required traction power of the whole vehicle, executing the second measure and/or the third measure.
4. The method of claim 1, wherein the determining whether there is a supply-to-demand for power for any car and/or whole car based on the demanded traction power and the available traction power for each car, and when there is a supply-to-demand for power, performing at least one of a first measure, a second measure, and a third measure, comprises: Calculating the required traction power of the whole vehicle and the available traction power of the whole vehicle based on the required traction power and the available traction power of each carriage; Determining whether the available traction power of the whole vehicle is smaller than the required traction power of the whole vehicle; And when the available traction power of the whole vehicle is smaller than the required traction power of the whole vehicle, executing the second measure and/or the third measure.
5. The method of claim 1, wherein the determining whether there is a supply-to-demand for power for any car and/or whole car based on the demanded traction power and the available traction power for each car, and when there is a supply-to-demand for power, performing at least one of a first measure, a second measure, and a third measure, comprises: Determining whether the available traction power of each car is less than the required traction power; And when the available traction power of any carriage is smaller than the required traction power, executing the second measure and/or the third measure.
6. The method according to any one of claims 2-4, wherein performing the second and/or third measure when the vehicle available traction power is less than the vehicle demanded traction power, further comprises: And when the available traction power of the whole vehicle is smaller than the required traction power of the whole vehicle, executing the second measure, determining whether the available traction power of the whole vehicle is smaller than the re-calculated required traction power of the whole vehicle after the second measure is executed, and executing the third measure if the available traction power of the whole vehicle is smaller than the required traction power of the whole vehicle.
7. The method of any of claims 1-5, wherein the first means further comprises controlling relay actuation between at least two cars such that power cells of the at least two cars are connected in parallel.
8. The method according to any one of claims 1-5, wherein the third measure further comprises: controlling the traction level of at least one compartment to decrease and/or controlling the motor speed of at least one compartment to decrease.
9. The method according to any of the claims 1-5, characterized in that the method further comprises outputting an alarm information when there is a supply-demand of power and/or when the third measure is performed.
10. A rail vehicle traction control device, characterized in that the device comprises a memory and a processor, wherein the memory has stored thereon a computer executable program to be run by the processor, which computer executable program, when run by the processor, causes the processor to perform the rail vehicle traction control method according to any one of claims 1-9.
11. A rail vehicle characterized in that it comprises the rail vehicle traction control device of claim 10.

Description

Rail vehicle traction control method and device and rail vehicle Technical Field The application relates to the technical field of rail transit, in particular to a rail vehicle traction control method and device and a rail vehicle. Background The current rubber-tyred tramcar consists of multiple marshalling carriages, and the power of each carriage is supplied by high-voltage power supplied by a power battery to drive the motor of each carriage. In general, in order to ensure the isolation safety of high voltage, the power battery of each carriage is usually physically isolated and independently outputs high voltage. Such rail vehicles have limited power available from power cells relative to trains or trams from which power is derived from conductor rails, and there may be situations where power cannot be met in the event of a fault. In addition, compared with a car or a bus, the rubber-tyred tramcar cannot stay on an operation line for a long time, so that line blockage and operation late or even interruption accidents can be caused, and the motor car capability of the car needs to be ensured, and passengers can be cleared in time and the tramcar can be returned to a warehouse for maintenance. Therefore, a scheme for ensuring the motor car capability of the vehicle and enabling the vehicle to return to a warehouse for maintenance in time is needed to be provided under the fault working conditions of power battery faults or power battery power limitation or high-voltage electric leakage and the like. Disclosure of Invention According to one aspect of the application, a traction control method of a railway vehicle is provided, and comprises the steps of obtaining a traction instruction, load information of each carriage, allowable discharge power feedback information of a power battery of each carriage and equipment power consumption feedback information of each carriage, calculating required traction power of each carriage based on the traction instruction and the load information, calculating available traction power of each carriage based on the allowable discharge power feedback information and the equipment power consumption feedback information, determining whether power supply shortage exists in any carriage and/or the whole vehicle based on the required traction power and the available traction power of each carriage, and executing at least one of a first measure, a second measure and a third measure when the power supply shortage exists, wherein the first measure comprises controlling the communication of the power batteries of at least two carriages, the second measure comprises controlling the shutdown of at least part of unnecessary power consumption equipment in at least one carriage, and the third measure comprises controlling the reduction of the required traction power of the at least one carriage. In one embodiment of the application, the method for determining whether the power supply shortage exists in any carriage and/or the whole vehicle based on the required traction power and the available traction power of each carriage comprises the steps of calculating the required traction power of the whole vehicle and the available traction power of the whole vehicle based on the required traction power and the available traction power of each carriage, determining whether the available traction power of the whole vehicle is smaller than the required traction power of the whole vehicle, executing the second and/or the third measure when the available traction power of the whole vehicle is smaller than the required traction power of the whole vehicle, determining whether the available traction power of each carriage is smaller than the required traction power when the available traction power of the whole vehicle is not smaller than the required traction power of the whole vehicle, and executing the first measure when the available traction power of any carriage is smaller than the required traction power. In one embodiment of the application, the method comprises the steps of determining whether the supply undershoot of power exists in any carriage and/or the whole vehicle based on the required traction power and the available traction power of each carriage, executing at least one of a first measure, a second measure and a third measure when the supply undershoot of power exists, determining whether the available traction power of each carriage is smaller than the required traction power, calculating the required traction power of the whole vehicle and the available traction power of the whole vehicle based on the required traction power and the available traction power of each carriage when the available traction power of any carriage is smaller than the required traction power, and determining whether the available traction power of the whole vehicle is smaller than the required traction power of the whole vehicle, executing the first measure when the available traction power of the whole veh