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High-voltage direct-current circuit breaker

A high-voltage DC and AC circuit breaker technology, applied in the direction of circuits, electrical components, electrical switches, etc., can solve the problems of high cost of use, difficult to meet the operating time requirements, immature development of oscillation circuits, etc., to achieve shortened operating time, DC Reliable effect of arc extinguishing at zero crossing point of power transmission

Inactive Publication Date: 2015-11-18
SHANGHAI DIANJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high-voltage DC circuit breaker has two major disadvantages in turning the DC into a zero-crossing oscillation circuit to extinguish the arc: the first is that the development of the oscillation circuit is not yet mature, and the cost of use is relatively high; the second is the operating time of the device. difficult to meet

Method used

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  • High-voltage direct-current circuit breaker
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Embodiment Construction

[0016] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that all the drawings of the present invention are in simplified form and use inaccurate scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0017] like figure 1 and figure 2 As shown, the high-voltage DC circuit breaker provided by the present invention includes: an AC circuit breaker switch 10, a first power electronic circuit 20 connected to the input end of the AC circuit breaker switch 10 for converting DC to AC, and the The output terminal of the AC circuit breaker switch 10 is connected to the second power electronic circuit 30 for converting AC to DC. The first and second power electronic circuits 20, 30 are connected to the DC tra...

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Abstract

The invention discloses a high-voltage direct-current circuit breaker comprising an alternating-current circuit breaker switch, a first power electronic circuit connected with the input end of the alternating-current circuit breaker switch at one end and used to convert direct current into alternating current, and a second power electronic circuit connected with the output end of the alternating-current circuit breaker switch at one end and used to convert alternating current into direct current, wherein the other end of the first power electronic circuit and the other end of the second power electronic circuit are connected to a direct-current transmission line. Through cooperation between the alternating-current circuit breaker switch and the power electronic circuits, direct current is converted into alternating current first, and then, alternating current is converted into direct current after arc extinguishing. Thus, direct-current arc extinguishing has the advantages achieved by alternating-current arc extinguishing, and the problem of long action time is avoided.

Description

technical field [0001] The invention relates to a circuit breaker, in particular to a high-voltage direct current circuit breaker. Background technique [0002] In recent years, due to the increasing popularity of high-voltage direct current transmission, a large number of scientific and technological personnel have devoted themselves to the research of high-voltage direct current transmission, among which the research focus is mainly on the direct current transmission scheme and the equipment in the direct current transmission line. The difficulty of high-voltage DC circuit breakers is that the DC current has no zero-crossing point, so it is difficult to realize arc extinguishing at the zero-crossing point of the current like alternating current. In order to realize the current zero-crossing arc extinguishing, the current zero point must be artificially created, so the existing high-voltage DC circuit breaker is composed of three parts: AC circuit breaker, an oscillating ci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H9/54
CPCH01H9/54
Inventor 顾永超董贺贺查燚王飞宇唐珂程申
Owner SHANGHAI DIANJI UNIV
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