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Circuit breaker opening and closing control method, device and system

A control method and technology of a control device, applied in general control systems, control/regulation systems, program control, etc., can solve problems such as large equipment impact, large overvoltage multiples, affecting the service life of EMUs and traction power supply systems, etc. The effect of reducing shock and prolonging life

Inactive Publication Date: 2020-07-14
CHINA ACADEMY OF RAILWAY SCI CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the on-board circuit breakers of high-speed EMUs at home and abroad belong to random opening and closing, and the circuit breakers operate after receiving the opening and closing commands. The impact is large, which seriously affects the service life of the EMU and traction power supply system equipment; at the same time, there are many high-voltage accidents caused by overvoltage and overcurrent caused by random opening and closing, and the inrush current is excited when the closing is at the zero point of the catenary voltage Larger, the overvoltage multiple is too large at the peak of the catenary voltage when the switch is closed, and in severe cases, it will cause the electronic equipment of the EMU to fail to work normally and burn out, affecting driving safety
[0003] The existing high-speed EMU on-board circuit breakers at home and abroad do not consider the inherent characteristics of the traction power supply system and the harmonic frequency characteristics of the EMU itself. The elimination of the harmonic amplification phenomenon in special sections is also the result of overvoltage and overcurrent In severe cases, the bow will be lowered to stop, and the high-voltage insulation related equipment will be burned, which will seriously affect the smooth and safe operation of the EMU.
[0004] In addition, the intelligence level of the existing EMU circuit breaker device is low, and the intelligent interaction with the entire EMU and the traction power supply system is also low. Therefore, it is urgent to design a new type of intelligent circuit breaker to solve the current problem The overvoltage and overcurrent caused by the random opening and closing of the switch seriously affect the service life of the equipment of the EMU and the traction power supply system

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Embodiment Construction

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0028] Due to the overvoltage and overcurrent caused by the random opening and closing of the current circuit breaker, the service life of the EMU and the traction power supply system equipment is shortened, and the current circuit breaker has a low level of intelligence. Based on this, the present invention implements For example, a circuit break...

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Abstract

The invention discloses a circuit breaker opening and closing control method, device and system, and the method comprises the steps: obtaining the real-time voltage and real-time current of a high-voltage side of a motor train unit after pantograph rising; determining the current load characteristic of the motor train unit according to the real-time voltage and the real-time current in response tothe fact that the real-time voltage and the real-time current reach preset triggering conditions; according to pre-stored inherent electrical characteristics of the operation section and current loadcharacteristics of the motor train unit, judging whether to execute switching-off processing of the circuit breaker, wherein the circuit breaker is in a switching-on state at present; in response toa judgment result, executing switching-off processing, and generating switching-off phase information according to the real-time voltage and the real-time current; performing switching-off processingon the circuit breaker according to the switching-off phase information. According to the methd disclosed in the invention, the service life of the motor train unit and the traction power supply system can be prolonged.

Description

technical field [0001] The invention relates to the field of motor vehicles, in particular to a circuit breaker opening and closing control method, device and system. Background technique [0002] At present, the on-board circuit breakers of high-speed EMUs at home and abroad belong to random opening and closing, and the circuit breakers operate after receiving the opening and closing commands. The impact is large, which seriously affects the service life of the EMU and traction power supply system equipment; at the same time, there are many high-voltage accidents caused by overvoltage and overcurrent caused by random opening and closing, and the inrush current is excited when the closing is at the zero point of the catenary voltage Larger, the overvoltage multiple is too large at the peak of the catenary voltage when the switch is closed, and in severe cases, it will cause the electronic equipment of the EMU to fail to work normally and burn out, affecting driving safety. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/042
CPCG05B19/0428G05B2219/2612G05B2219/2639
Inventor 郭旭刚郭晨曦张继元李强杨斯泐王坤
Owner CHINA ACADEMY OF RAILWAY SCI CORP LTD
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