Abstract：In order to solve the switching problem in HVDC circuits,a novel topology structure of arc-less DC breaker is proposed.High-speed mechanical switches generates strong reversal voltage at the moment of disconnecting phase and additional charging is needed for the pre-charging capacitor.To avoid the limitation of the traditional hybrid breaks,we proposed the three-stage current commutation design.We also developed the equivalent mathematical model of the topology structure to analyze the critical commutation moments of several working-phases to obtain the correctness proof.The results show that the new DC breaker ensures arc-less disconnection of mechanical switches and speed up the disconnection.
张国军, 宋飞凡, 李绍明, 代国印. 三阶段电流转移混合型无弧直流断路器[J]. 电工技术学报, 2017, 32(11): 87-95.
Zhang Guojun, Song Feifan, Li Shaoming, Dai Guoyin. Hybrid Arc-Less DC Circuit Breaker Based on Three Stage Current Commutation. Transactions of China Electrotechnical Society, 2017, 32(11): 87-95.
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2017, Vol. 32 
