一起110kV户外六氟化硫断路器B相拒动故障浅析  

Analysis on Refusal Operation of Phase B of 110 kV Outdoor SF_(6)Circuit Breaker

作　　者：彭家琦 蒲寅 贾忠军 朱小斌 冶海平 PENG Jiaqi;PU Yin;JIA Zhongjun;ZHU Xiaobin;YE Haiping(Haidong Power Supply Company,Qinghai Electric Power Company,Qinghai Haidong 810600,China)

机构地区：[1]国网青海省电力公司海东供电公司,青海海东810600

出　　处：《高压电器》2023年第3期216-220,共5页High Voltage Apparatus

摘　　要：110 kV六氟化硫断路器拒动会造成电网事故及人身事故,为避免此类故障的发生,分析一起户外110 kV六氟化硫断路器拒动故障,通过解体检查、试验分析,找到了故障的原因为轴销挡圈损坏脱落,导致灭弧室动侧活塞拉杆和支柱绝缘拉杆轴销处于半脱落状态,在多次分合断路器的过程中,最终轴销脱落,拉杆脱离,提出了优化改进措施,通过加装等电位片,使圆柱销与活塞拉杆、圆柱销与绝缘拉杆接头在孔中可靠接触,有效避免了类似故障的发生,为户外六氟化硫断路器类似故障提供了参考处理措施。Refusal operation of 110 kV sulfur hexafluoride(SF_(6))circuit breaker will cause power grid and personal accident.In order to avoid occurrence of such fault,the refusal operation of an outdoor 110 k V SF_(6)circuit breaker is is analyzed.Throughout disassembly inspection and test analysis,the cause,which is found,is that the shaft pin retainer ring has damaged and fallen off,causing the piston rod at the moving side of interrupter as well as the shaft pin of the support insulating rod to be at semi fall-off condition and,as a result,the shaft pin fell off and the rod separated during the multiple opening and closing operation of circuit breaker.The optimization and improvement measures are proposed.Such measures as adding equipotential sheet to keep the cylindrical pin and the piston rod,and the cylindrical pin and the joint of the insulation rod closely contact in the hole avoid effectively occurrence of the similar fault and provide reference treatment measures for the similar fault of outdoor SF_(6)circuit breaker.

关 键 词：断路器 故障 拒动 圆柱销 

分 类 号：TM561.3[电气工程—电器]