Dynamic Dielectric Recovery Characteristics of CO2 Gas Circuit Breaker Based on Current Commutation
Cheng Xian1,2, Yang Peiyuan1,2, Ge Guowei1,2, Cheng Zixia1,2, Wang Huaqing1,2
1. School of Electrical Engineering Zhengzhou University Zhengzhou 450001 China; 2. Henan Engineering Research Center of Power Transmission & Distribution Equipment and Electrical Insulation Zhengzhou 450001 China
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.
程显, 杨培远, 葛国伟, 程子霞, 王华清. 基于电流转移的CO2气体断路器动态介质恢复特性[J]. 电工技术学报, 2019, 34(23): 5030-5038.
Cheng Xian, Yang Peiyuan, Ge Guowei, Cheng Zixia, Wang Huaqing. Dynamic Dielectric Recovery Characteristics of CO2 Gas Circuit Breaker Based on Current Commutation. Transactions of China Electrotechnical Society, 2019, 34(23): 5030-5038.
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2019, Vol. 34 
