电容器组投切用SF<sub>6</sub>断路器介质恢复特性数值计算与试验研究

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Abstract The dielectric recovery characteristics of the capacitor bank SF₆ circuit breaker is studied through numerical computation and experiment.The electric field and the flow field of the arc quenching chamber is calculated,and then the breakdown voltage curve between contacts can be obtained based on the stream theory.The experimental circuit is set up for the experiment of gap dynamic breakdown characteristics between arc contacts,and the breakdown voltage is measured during the closing and breaking process of the circuit breaker.The numerical and experimental results are then combined to acquire the dielectric recovery characteristics of the SF₆ circuit breaker by analyzing the influence of different pressure on the breakdown voltage between contacts.The results show that the breakdown voltage of the closing process (with 4.7 m/s average speed) is greater than that of the breaking process (with 9.6 m/s average speed) for the same contact gap.

Key words： SF₆ circuit breaker gas flow field dynamic breakdown dielectric recovery

Received: 05 February 2015 Published: 07 December 2015

PACS:

TM561

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	Lin Xin
	Xia Yalong
	Liu Weidong
	Wang Feiming
	Xu Jianyuan
	Li Zhibing

Cite this article:

Lin Xin,Xia Yalong,Liu Weidong等. The Numerical Computation and Experiment Research on Dielectric Recovery Characteristics of SF₆ Circuit Breaker for Switching Capacitor Bank[J]. Transactions of China Electrotechnical Society, 2015, 30(17): 161-171.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2015/V30/I17/161

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