气流流路对高压SF<sub>6</sub>断路器介质强度混沌影响

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Abstract The breaking performance of high voltage SF₆ circuit breaker primarily depends on the dielectric recovery characteristics. During the breaking, gas flow in the transonic flow paths inevitably generates the turbulence and shock, and the gas flow parameters exists chaos, while the gas flow movement is complex in microsecond time level and millimeter space level. Based on the finite volume method, the gas flow field of 550kV singe-break high voltage SF₆ circuit breaker under small capacitive current interruption is simulated, by changing the contour of nozzle structure can effectively control the gas flow paths, and also the behavior of gas flow parameters are changed. And the finite element method is used to simulate the electric field of the arc quenching chamber, and based on the streamer theory different dielectric recovery characteristics under different nozzle structures are obtained. Because the dielectric recovery exists chaos during breaking, the breaking performance can be affected accordingly. And by changing the nozzle structures, the chaotic characteristics of the circuit breaker can be effectively regulated in order to improve the dielectric recovery characteristics and the breaking performance.

Key words： SF6 circuit breaker chaos dielectric recovery characteristics nozzle phase space reconstruction

Received: 10 September 2013 Published: 10 April 2015

PACS:

TM561.3

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	Articles by authors
	Leng Xue
	Liu Xiaoming
	Cao Yundong
	Han Ying
	Wang Erzhi

Cite this article:

Leng Xue,Liu Xiaoming,Cao Yundong等. Effect of Gas Flow Path on Dielectric Recovery Chaos Characteristics of High Voltage SF₆ Circuit Breaker[J]. Transactions of China Electrotechnical Society, 2015, 30(6): 162-168.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2015/V30/I6/162

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