420kV及以上高压断路器电寿命试验中SF6气体分解产物及其影响研究  

Study on the Effect of SF6 Gas Decomposition Products in Electrical Endurance Test of 420 kV and Above Circuit Breaker

作　　者：王昊 张长虹[2] 杨旭[2] 黎卫国[2] 赵倩 鄂振扬 方明 杨宁 WANG Hao;ZHANG Changhong;YANG Xu;LI Weiguo;ZHAO Qian;E Zhenyang;FANG Ming;YANG Ning(Xi’an High Voltage Apparatus Research Institute Co.,Ltd.,Xi’an 710077,China;Electrical Science and ResearchInstitute of EHV Power Transmission Company China Southern Power Grid,Guangzhou 510663,China)

机构地区：[1]西安高压电器研究院股份有限公司,西安710077 [2]中国南方电网有限责任公司超高压输电公司电力科研院,广州510663

出　　处：《高压电器》2023年第10期88-95,共8页High Voltage Apparatus

摘　　要：断路器承担着切除电力系统短路故障的重要任务,当故障出现时,需要断路器在数十毫秒内开断短路电流,因此断路器的性能对电力系统的安全运行有着重要的影响。SF6气体是高电压等级交流断路器中最常用的灭弧介质,开断短路电流的过程中,SF6会在电弧作用下产生多种分解产物,降低断路器的开断能力。文中通过对5台420kV及以上高压交流断路器开展电寿命试验,对SF6分解产物进行跟踪测量及分析,研究了SO2等分解产物对断路器开断性能的影响。Circuit breakers undertake the important task of removing the short circuit fault of the power system.When the fault occurs,circuit breaker needs to break the short circuit current within tens of milliseconds,so the performance of the circuit breaker has an important influence on the safety of the power system.SF6 gas is the most commonly used arc extinguishing medium in high voltage AC circuit breakers.In the process of breaking short circuit current,SF6 will produce a variety of decomposition products because of the arc,which will reduce the breaking capacity of circuit breakers.In this paper,the electrical endurance tests of five 420 kV and above high voltage AC circuit breakers were carried out.The decomposition products of SF6 were tracked,measured and analyzed,and the influence of decomposition products such as SO2 on the breaking performance of circuit breakers was studied.

关 键 词：断路器 SF6气体分解产物 电寿命试验 电弧 

分 类 号：TM561[电气工程—电器]