三阶段电流转移混合型无弧直流断路器  

Hybrid Arc-Less DC Circuit Breaker Based on Three Stage Current Commutation

作　　者：张国军[1] 宋飞凡 李绍明[1] 代国印 Zhang Guojun Song Feifan Li Shaoming Dai Guoyin(Electrical Engineering and Automation Department of Liaoning Technical University Huludao 125105 China)

机构地区：[1]辽宁工程技术大学电气与控制工程学院,葫芦岛125105

出　　处：《电工技术学报》2017年第11期87-95,共9页Transactions of China Electrotechnical Society

摘　　要：针对高压直流电路存在开断困难的问题,提出了一种无弧直流断路器的拓扑结构。该拓扑结构采用三阶段的电流转移方案,解决了基于传统强迫关断原理的混合型断路器开断时,高速机械开关在打开瞬间有较大的反向恢复电压,需要给预充电电容另加充电电源的问题。通过等效数学模型对工作阶段的临界时刻进行数学计算以及对其推导的正确性进行仿真分析。分析结果表明,采用所提出的拓扑结构不但可以使机械开关无弧分断,而且分断速度较快。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.

关 键 词：无弧直流断路器 拓扑结构 混合型断路器 三阶段电流转移 分断时间 

分 类 号：TM561[电气工程—电器]