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.
出处
《电网技术》
EI
CSCD
北大核心
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)~~
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
vacuum circuit breakers （VCBs） with triple breaks
dynamic voltage-sharing
non-synchronous breaking
reignition
grading capacitance
metal oxide arrester （MOA）
