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Electric traction locomotive operation overvoltage suppression control system and method

A technology of operating overvoltage and electric traction, which is applied to vehicle components, installation along the driving track, transportation and packaging, etc. It can solve the problems of current back-channeling to the car body, abnormal shaft temperature, and car body heating, etc., so as to suppress the car body Effects of circulating current, reducing insulation breakdown, and increasing impedance

Active Publication Date: 2020-03-27
SOUTHWEST JIAOTONG UNIV
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  • Summary
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AI Technical Summary

Problems solved by technology

However, due to the difference in resistance between the rail circuit and the car body circuit, this grounding method will make the current of the working ground easily go back to the car body through the protective ground, causing local heating and local circulation of the car body, and when the current flows into the bearing, it will cause Abnormal shaft temperature, causing bearing electric candle

Method used

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  • Electric traction locomotive operation overvoltage suppression control system and method
  • Electric traction locomotive operation overvoltage suppression control system and method
  • Electric traction locomotive operation overvoltage suppression control system and method

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Embodiment Construction

[0038] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. An electric traction locomotive operation overvoltage suppression control system, such as figure 1 As shown, it includes catenary 1, pantograph 2, lightning arrester 3, hoisting bow overvoltage suppressor 4, circuit breaker 5, circuit breaker operation overvoltage suppressor 6, current transformer, and main transformer 7 in the train traction power supply system , high-voltage cables, a new protective grounding device 8, and a train body 9.

[0039] When the train is working normally, the hoisting bow overvoltage suppression device 4, the circuit breaker operation overvoltage suppressor 6, and the new protective grounding device 8 automatically operate according to the state of the pantograph 2 and the circuit breaker 5. At the same time, it can also be monitored and manually controlled by the cab.

[0040] The lifting bow overvoltage...

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PUM

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Abstract

The invention discloses an electric traction locomotive operation overvoltage suppression control system and method. The system comprises a pantograph rising and falling overvoltage suppressor connected in series between a pantograph and a circuit breaker, a circuit breaker operation overvoltage suppressor connected in series between the circuit breaker and a main transformer, and a novel protection grounding device connected in series in a grounding cable between a carriage bottom bogie and a grounding carbon brush. When the circuit breaker acts, the circuit breaker operates an inductor in the overvoltage suppressor to be connected into a circuit, a train protection grounding system is directly grounded through a grounding cable, a train body resistor bears most overvoltage in the circuit, and the train body pantograph rising surge overvoltage is reduced. And the residual overvoltage is released through a grounding cable in the novel protection grounding device, so that the overvoltage of the vehicle body is greatly reduced. In the processes of pantograph rising and falling, neutral section passing, short circuit faults and the like, due to overvoltage generated by actions of a pantograph and a circuit breaker, weak current signal equipment damage and insulation breakdown caused by overvoltage operation are avoided.

Description

technical field [0001] The invention relates to the technical field, in particular to an electric traction locomotive operation overvoltage suppression control system and method. Background technique [0002] During the operation of my country's electric traction locomotives, the high-voltage system is vulnerable to the threat of various operating overvoltages, such as the surge overvoltage generated during the bow raising and lowering process; the overvoltage generated by operating the circuit breaker when the EMU is over-phased; There are many situations such as overvoltage generated by operating the circuit breaker during the process. The surge overvoltage of the vehicle body generated by the above working conditions will affect the vehicle's weak current signal equipment, causing logical disorder of the equipment, accelerating insulation aging, and even causing insulation breakdown, resulting in the inability of the vehicle's sensors or control equipment to work normally....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60M5/02
CPCB60M5/02
Inventor 肖嵩张灿吴京驰罗远培饶阳李宇星桂志远孟举李玉航吴广宁高国强杨雁高波曹保江李春茂
Owner SOUTHWEST JIAOTONG UNIV
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