高电压技术2012，Vol.38Issue(4)：999-1005,7.
126kV 3断口真空断路器的重燃特性
Re-ignition Characteristics of 126kV Vacuum Circuit Breaker with Triple Breaks
摘要
Abstract
To analyze the re-ignition characteristics of a 126 kV vacuum circuit breaker（VCB） with triple breaks,we established a transient equivalent model of a 126 kV VCB with triple breaks,which contained a dielectric re-ignition criteria.Thereby,we simulated the re-ignition current waveform of the break which took higher part of transient recovery voltage（TRV）.A damped resistor was added in the grading capacitor branch to extinguish re-ignition current as early as possible.The results show that,the effect of damped resistor is the best when its value is threshold between oscillatory and non-oscillatory decay.Moreover,we simulated and analyzed excessive TRV which appeared across unre-ignition breaks and power frequency recovery voltage（PFRV） which appeared across re-ignition break in the presence and absence of grading capacitors.A metal oxide arrester（MOA） was shunted across each break to ensure breaking successfully and to protect the external insulation of re-ignition break by limiting excessive TRV and PFRV,respectively.Results show that,the voltage limiting effect is preferable when a MOA with reference voltage of 50 kV is in parallel with a grading capacitor of 1 000 pF,also the thermal limit can be satisfied,providing a basis for choosing proper dynamic voltage-sharing measures for a 126 kV VCB with triple breaks.关键词
3断口真空断路器（VCB）/重燃/均压电容/阻尼电阻/金属氧化物避雷器（MOA）/动态均压措施Key words
vacuum circuit breaker(VCB) with triple breaks/re-ignition/grading capacitor/damped resistor/metal oxide arrester(MOA)/dynamic voltage-sharing measures分类
信息技术与安全科学引用本文复制引用
舒胜文,阮江军,黄道春,陈轩恕,吴高波,李辉..126kV 3断口真空断路器的重燃特性[J].高电压技术,2012,38(4):999-1005,7.基金项目
国家“十一五”科技支撑计划 （）
国家电网公司重大科技项目 （）
中央高校基本科研业务费专项资金 （）
