新型真空直流限流断路器设计及其介质恢复特性

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Abstract An improved scheme of forced artificial current zero is proposed, with a freewheel diode connected in reverse parallel to the high speed vacuum breaker. To solve the problem that traditional vacuum breaker met in breaking high d#em/em#/(dt) short circuit current, a zero recovery period is obtained which can greatly improves the dielectric recovery of the vacuum interrupter. Thus, high d#em/em#/(dt) short circuit current can be shut down immediately after the vacuum interrupter opens. The working principle of the new topology is analyzed and a high speed diving mechanism along with a reverse circuit are designed. Vacuum dielectric recovery test is conducted to proved the feasibility of the scheme. Finally, a 1kV/400A prototype is developed and breaking test with d#em/em#/(dt) of 5A/µs is performed and the short circuit current is limited to be below 2.5kA.

Key words： DC vacuum circuit breaker forced current zero vacuum dielectric recovery breaking test

Received: 30 November 2011 Published: 28 November 2013

PACS:

TM561

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	Articles by authors
	Xu Guoshun
	Jiang Zhuangxian
	Zhuang Jinwu
	Wang Chen
	Wu Jin
	Liu Luhui
	Wu Hongjiang

Cite this article:

Xu Guoshun,Jiang Zhuangxian,Zhuang Jinwu等. A New DC Vacuum Current Limiting Circuit Breaker and Its Dielectric Recovery Characteristics[J]. Transactions of China Electrotechnical Society, 2013, 28(2): 171-177.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I2/171

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