Vacuum Dielectric Recovery Characteristics of a Novel Current Limiting Circuit Breaker Base on Artificial Current Zero  

作　　者：JIANG Zhuangxian ZHUANG Jinwu WANG Chen WU Jin LIU Luhui 

机构地区：[1]College of Electrical and Information Engineering, Naval University of Engineering

出　　处：《中国电机工程学报》2012年第13期I0021-I0021,204,共1页Proceedings of the CSEE

基　　金：国家自然科学基金项目（50877078）;湖北省杰出青年基金项目（2007ABB001）.

摘　　要：为了保证新型强迫换流型真空直流限流断路器关断短路电流的可靠性，对该型断路器分断过程的真空介质恢复特性进行研究。设计了与断路器关断过程等效的介质恢复试验方案，通过等效试验结果和理论推演公式的拟合，得到了新型强迫换流型限流断路器真空灭弧室触头打开过程的动态介质强度恢复规律。研究结果表明：减小燃弧能量、提高触头运动速度可提高真空灭弧室介质的临界击穿电压；综合考虑燃弧时间与燃弧能量及触头开距的关系，随着燃弧时间的增加，真空灭弧室临界击穿电压先减小后增大。所得介质恢复规律可以作为新型断路器优化设计的参考依据。A novel current limiting circuit breaker employs zero current switching method in cutting off DC current, which gives out a reverse impulsive current towards a high speed vacuum interrupter and force the current down to zero. This kind of breaker is simply in structure and can act in a very short time with high current limiting capability, and therefore it has a long electric life and is extremely suitable to be installed in a DC electrical system as a fault orotection utility.

关 键 词：零电流开关 电路断路器 限流断路器 真空灭弧室 恢复特性 介质 人工 直流电气系统 

分 类 号：TM561[电气工程—电器] TN624