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Overcurrent protection control method and system for pantograph in pantograph rising state

A technology of overcurrent protection and control method, which is applied in the direction of overcurrent protection, emergency protection circuit devices, collectors, etc., and can solve problems such as undetectable, substation damage, fire, etc.

Active Publication Date: 2021-02-05
CRRC QINGDAO SIFANG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, when the pantograph is in the state of raising the bow, it is impossible to detect and protect the overcurrent or short circuit fault of the main circuit where the pantograph is located. If the main circuit where the pantograph is located has an overcurrent or short circuit fault (for example, the lead to overcurrent; the insulation layer of the main power supply high-voltage cable is damaged, causing a short circuit between the high-voltage line and the car body, and then forming a current overcurrent), which will cause the car body to receive high-voltage power. When the high-voltage insulation on the roof fails, high voltage may also be formed A short circuit to the car body will easily form a large current, break down the car body, fuse the pantograph net, cause fire, damage the substation, etc.

Method used

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  • Overcurrent protection control method and system for pantograph in pantograph rising state
  • Overcurrent protection control method and system for pantograph in pantograph rising state
  • Overcurrent protection control method and system for pantograph in pantograph rising state

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Embodiment 1

[0038] According to an embodiment of the present invention, an embodiment of an overcurrent protection control method in the pantograph raising state is provided, referring to figure 2 , including the following steps:

[0039] Step S101: Obtain vehicle speed, pantograph status, catenary current flowing into the vehicle, catenary voltage in contact with the pantograph, and main circuit breaker status information;

[0040] Step S102: Judging overcurrent faults under different working conditions based on the information obtained above;

[0041] Specifically, according to the obtained parameter information such as vehicle speed, pantograph state, catenary current flowing into the vehicle, catenary voltage in contact with the pantograph, and main circuit breaker status, the overcurrent fault judgment under different working conditions The logic is different, and the overcurrent fault judgment logic under two different working conditions is given below:

[0042] (1) Judgment logi...

Embodiment 2

[0082] According to an embodiment of the present invention, an embodiment of an overcurrent protection control system in the pantograph raising state is provided, refer to Figure 5 , including:

[0083] The data acquisition module is used to respectively acquire vehicle speed, pantograph status, catenary current flowing into the vehicle, catenary voltage in contact with the pantograph, and main circuit breaker status information;

[0084] A fault judgment module, configured to judge overcurrent faults under different working conditions based on the information obtained above;

[0085] The protection action module is used to determine whether to trigger an over-current protection action according to the judgment result of the over-current fault.

[0086] It should be noted here that the above-mentioned data acquisition module, fault judgment module and protection action module correspond to steps S101 to S103 in the first embodiment, and the examples and application scenarios...

Embodiment 3

[0092] In one or more embodiments, a terminal device is disclosed, including a server, the server includes a memory, a processor, and a computer program stored on the memory and operable on the processor, and the processor executes the The program realizes the overcurrent protection control method in the pantograph raising state in the first embodiment. For the sake of brevity, details are not repeated here.

[0093] It should be understood that in this embodiment, the processor can be a central processing unit CPU, and the processor can also be other general-purpose processors, digital signal processors DSP, application specific integrated circuits ASIC, off-the-shelf programmable gate array FPGA or other programmable logic devices , discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.

[0094] The memory may include read-only memory...

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Abstract

The invention discloses an overcurrent protection control method and system in a pantograph rising state. The overcurrent protection control method comprises the steps: respectively acquiring the vehicle speed, the pantograph state, the current flowing into a vehicle from a contact network, the voltage of the contact network making contact with a pantograph and the state information of a main circuit breaker; judging overcurrent faults under different working conditions on the basis of the obtained information; and determining whether to trigger an overcurrent protection action or not according to the overcurrent fault judgment result. According to the invention, a mode of combining logic judgment with a driving hardware circuit can be realized, the risk that a pantograph net, high-voltageequipment and personnel are possibly damaged when overcurrent and short-circuit faults occur in a pantograph-lifting high-voltage power-receiving state of a vehicle is solved, and the problem that accurate and comprehensive protection cannot be realized only by virtue of the hardware circuit is solved.

Description

technical field [0001] The invention relates to the technical field of urban rail transit, in particular to an overcurrent protection control method and system in a pantograph raised state. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] The pantograph is the electrical equipment used by the electric traction locomotive to obtain electric energy from the catenary. It is installed on the roof of the locomotive. When the pantograph is raised, it can obtain high-voltage alternating current from the high-voltage catenary to provide power for vehicle traction equipment and other auxiliary facilities. . [0004] refer to figure 1 , on the roof part, the main road where the pantograph is located is connected to lightning arresters, voltage transformers, main circuit breakers, current transformers and other equipment; in the lower part of the ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/08H02H1/00B60L5/28
CPCH02H3/08H02H1/0007B60L5/28
Inventor 崔玉龙张善秋杨国艺刘汉王广袤
Owner CRRC QINGDAO SIFANG CO LTD
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