高压无弧直流断路器设计与仿真  

Design and simulation of high voltage arc-less DC circuit breaker

作　　者：张国军[1] 宋飞凡 代国印 李绍明[1] 

机构地区：[1]辽宁工程技术大学电气与控制工程学院,辽宁葫芦岛125105

出　　处：《辽宁工程技术大学学报（自然科学版）》2017年第11期1199-1203,共5页Journal of Liaoning Technical University (Natural Science)

摘　　要：针对传统强迫换流混合型直流断路器,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,提出了一种基于一次自然换流和两次强迫换流的高压无弧直流断路器的拓扑结构.对无弧直流断路器的各个工作阶段的临界时刻进行等效数学模型的理论推导,并对其推导的正确性进行仿真分析.分析结果表明,采用文中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.Focusing on the problems of traditional forced commutation hybrid type DC circuit breaker like that there is large reverse recovery voltage when high-speed mechanical switches instantly open, and it is needed to add charging power supply to pre-charging capacitor, this paper proposed a new non-arc DC breaker topology based on once natural commutation and secondary forced commutation. The critical moment of the working stage was calculated though the equivalent mathematical model and the simulation was carried out to analysis the correctness of the derivation. The results show that the new DC breaker not only realizes the mechanical switch arc-less breaking,but also makes the breaking speed faster.

关 键 词：无弧直流断路器 混合型断路器 强迫换流 自然换流 分断时间 

分 类 号：TM561[电气工程—电器]