双断口真空断路器关合直流电压预击穿特性实验研究  

Research on Prestrike Characteristics of Double-Break VCB Under Direct Current Voltages

作　　者：彭晶 邓云坤[1] 王科 陈兴贵 耿云 耿英三 PENG Jing;DENG Yunkun;WANG Ke;CHEN Xinggui;GENG Yun;GENG Yingsan(Electric Power Research Institute,Yunnan Power Grid Co.,Ltd.,Kunming 650217,China;State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]云南电网有限责任公司电力科学研究院,云南昆明650217 [2]西安交通大学电力设备与电气绝缘国家重点实验室,陕西西安710049

出　　处：《电器与能效管理技术》2021年第10期7-12,27,共7页Electrical & Energy Management Technology

基　　金：云南省科技项目(2018BA062);南网科技项目(YNKJXM20180171)。

摘　　要：通过实验,研究了双断口真空断路器关合直流电压下预击穿特性。测量了单断口和双断口真空断路器关合不同电压等级直流电压下预击穿开距,并计算其威布尔概率分布。结果表明,与单断口真空断路器的50%预击穿开距相比,双断口真空断路器中每个灭弧室的d_(50)降低了25.0%~72.7%。由于双断口真空断路器的分压作用,其高压侧、低压侧真空灭弧室的预击穿开距分散性比单断口真空断路器预击穿开距分散性显著降低。The purpose of this paper is to study the prestrike characteristics of a double-break vacuum circuit breaker under direct current voltages.In this experiment,we measured the prestrike gap of the single-break and the double-break vacuum circuit breaker in closing operations under different voltage levels,and calculated their Weibull probability distribution.The results show that,compared with the 50%prestrike gap of the single-break vacuum circuit breaker,the d_(50) of each vacuum interrupter in the double-break vacuum circuit breaker is reduced by 25.0%~72.7%.Due to the voltage sharing effect of double-break vacuum breaker,the dispersion of the prestrike gaps of the vacuum interrupters in the high voltage side and low voltage-side of double-break vacuum breaker is significantly lower than that of the single-break vacuum circuit breaker.

关 键 词：真空断路器 双断口 预击穿特性 真空灭弧室 预击穿开距 

分 类 号：TM561[电气工程—电器]