超导限流式无弧分断直流断路器研究  

Research of arc-less breaking DC circuit breaker based on superconducting current-limiting

作　　者：张文昱 章宝歌 王东豪 许兰民 Zhang Wenyu;Zhang Baoge;Wang Donghao;Xu Lanmin(School of Automation and Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]兰州交通大学自动化与电气工程学院

出　　处：《低温与超导》2019年第11期29-34,44,共7页Cryogenics and Superconductivity

基　　金：国家自然科学基金(61741508)资助

摘　　要：针对系统可靠运行与快速切断故障电流间的矛盾,提出一种基于超导限流的无弧分断直流断路器结构。该结构利用超导限流单元有效抑制了故障电流峰值,加快了换流速度,结合全控器件减少换流次数,解决了因可靠性延时期间过快的电流增长率,并缩短开断时间。对超导限流单元进行建模,通过数学模型分析断路器各阶段工作状态并进行了仿真。结果表明,该结构能够在提高分断速度同时有效缓解可靠性与速动性间的矛盾。Aiming at the contradiction between reliable operation of the system and rapid cutoff of fault current, a structure with arc-less breaking DC circuit breaker based on superconducting current-limiting was proposed. The structure utilized a superconducting current-limiting unit to suppress the peak value of the fault current effectively so as to speed up the commutation speed. It combined the full-control device to reduce the number of commutations, solved the large current growth rate due to the reliability delay period, and shortened the breaking time. The superconducting current-limiting unit was modeled, and the working state of each stage of the circuit breaker was analyzed by mathematical model and simulated. The results show that the structure can improve the breaking speed and effectively alleviate the contradiction between reliability and speed.

关 键 词：直流断路器 超导限流 强迫换流 拓扑结构 

分 类 号：TM774[电气工程—电力系统及自动化]