Hybrid DC circuit breaker and DC system on-off control method

A technology of DC circuit breaker and DC system, which is applied in the direction of emergency protection device for automatic disconnection, emergency protection circuit device for limiting overcurrent/overvoltage, circuit device, etc. Brake, DC circuit breaker slow breaking speed and other problems, to achieve the effect of improving contact life, improving breaking speed and contact life, simple structure

Pending Publication Date: 2020-05-12
SICHUAN ENERGY INTERNET RES INST TSINGHUA UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a hybrid DC circuit breaker and a control method for breaking the DC system, which can solve the problems of slow breaking speed, serious contact ablation and inability to quickly reclose the DC circuit breaker in the rail transit system

Method used

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  • Hybrid DC circuit breaker and DC system on-off control method
  • Hybrid DC circuit breaker and DC system on-off control method
  • Hybrid DC circuit breaker and DC system on-off control method

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Embodiment Construction

[0032] 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. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0033] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art wi...

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Abstract

The invention provides a hybrid DC circuit breaker and a DC system on-off control method, and relates to the technical field of circuit breakers. The hybrid DC circuit breaker comprises a through-flowbranch, an electronic switch branch and an energy absorption branch; the through-flow branch comprises a mechanical switch, the two ends of the through-flow branch are connected to a direct-current system in series, and the electronic switch branch and the energy absorption branch are both connected with the through-flow branch in parallel. The hybrid DC circuit breaker is adopted in the on-off control method of the DC system. The hybrid DC circuit breaker can solve the problems that a DC circuit breaker in a rail transit system is low in breaking speed and serious in contact ablation and cannot be quickly reclosed.

Description

technical field [0001] The invention relates to the technical field of circuit breakers, in particular to a hybrid direct current circuit breaker and a control method for breaking a direct current system. Background technique [0002] With the expansion of the city scale, the construction of rail transit projects has made great strides. Urban rail transit locomotives generally use DC power supply. DC fast circuit breaker is the core protection equipment of DC traction power supply system. It has the protection function of cutting off the circuit fault current and is the guarantee for the safe operation of DC power supply system. [0003] Compared with the AC system, the breaking of the DC system is more difficult, because there is no natural zero-crossing point in the DC system, and certain technical means must be used to force the current to cross zero. In addition, during the breaking process, the DC circuit breaker also needs to absorb a large amount of energy stored in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/087H02H9/04
CPCH02H3/087H02H9/045
Inventor 胡茂良刘滨余占清曾嵘黄瑜珑周雁南白羽崔康生
Owner SICHUAN ENERGY INTERNET RES INST TSINGHUA UNIV
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