三断口真空断路器的动态均压措施  

Dynamic Voltage-Sharing Measures for Vacuum Circuit Breakers With Triple Breaks

作　　者：舒胜文[1] 阮江军[1] 黄道春[1] 吴高波[1] 刘兵[2] 张坤[1] 

机构地区：[1]武汉大学电气工程学院,湖北省武汉市430072 [2]华中电网有限公司,湖北省武汉市430077

出　　处：《电网技术》2010年第10期43-48,共6页Power System Technology

基　　金："十一五"国家科技支撑计划重大项目(2009BAA-19B05);国家电网公司科技项目(SG0846)~~

摘　　要：为解决三断口真空断路器串联运行的动态均压问题,从其暂态等值模型出发,通过PSCAD/EMTDC仿真分析了杂散电容、非同期开断和重击穿对三断口真空断路器暂态恢复电压分配的影响。比较了均压电容和金属氧化物避雷器(metal oxide arrester,MOA)的均压效果。仿真结果表明,2种措施均具有较好的均压效果,但MOA在均压的同时还具有限压效果。因此建议采用均压电容与MOA共同作为三断口真空断路器的动态均压措施。To solve the dynamic voltage-sharing among series-operated vacuum circuit breakers （VCBs） with triple breaks, a transient equivalent model of the VCB with triple breaks is built by PSCAD/EMTDC, and the influences of stray capacitance, non-synchronous breaking and reignition on distribution of transient recovery voltage among VCBs with triple breaks are analyzed by simulation. The voltage-sharing effects of grading capacitance and metal oxide arrester （MOA） are compared. Simulation results show that both two measures can play good roles in voltage-sharing, besides MOA can play a role of voltage-limiting, thus it is recommended to use both grading capacitance and MOA as dynamic voltage-sharing measures for series-operated VCBs with triple breaks.

关 键 词：三断口真空断路器 动态均压 非同期开断 重击穿 均压电容 金属氧化物避雷器 

分 类 号：TM561.2[电气工程—电器]