基于电流转移的CO<sub>2</sub>气体断路器动态介质恢复特性

doi:10.19595/j.cnki.1000-6753.tces.181188

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Abstract In order to improve the dynamic dielectric recovery strength（DDRS）of the CO₂ gas circuit breaker (GCB), The current commutation method which consists of serial thyristors and current-limiting resistors is proposed to connect with the CO₂ GCB. The simulation model of the CO₂ GCB based on current commutation is established and the simulation results indicate that the current commutation method can enhance the DDRS of the CO₂ GCB. The test platform of the GCB is set up in order to investigate the DDRS. The influence of the current commutation method, different current-limiting resistors and different zero-current duration on the DDRS of the CO₂ GCB is researched. The test results indicate that the DDRS of the CO₂ GCB increases as the zero-current duration increases .The breakdown voltage is above 20kV after the main current zero when the zero-current duration is 1.2ms so that the DDRS with the above current commutation is much twice than that without current commutation. The best DDRS can be achieved by adjusting the current-limiting resistor from 200mΩ to 250mΩ. The paper supplies the base for the application of the CO₂ GCB.

Key words： CO₂ gas Mayr arc model dynamic dielectric recovery strength current commutation

Received: 09 July 2018 Published: 11 December 2019

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TM561

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	Cheng Xian
	Yang Peiyuan
	Ge Guowei
	Cheng Zixia
	Wang Huaqing

Cite this article:

Cheng Xian,Yang Peiyuan,Ge Guowei等. Dynamic Dielectric Recovery Characteristics of CO₂ Gas Circuit Breaker Based on Current Commutation[J]. Transactions of China Electrotechnical Society, 2019, 34(23): 5030-5038.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.181188 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I23/5030

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