一起220kV断路器非全相运行原因分析及防范措施  

Cause Analysis and Preventive Measures of the 220kV Circuit Breaker Non-Full-Phase Operation

作　　者：唐小平 杨红 汤雪鹏 李志政 王飞 TANG Xiao-ping;YANG Hong;TANG Xue-peng;LI Zhi-zheng;WANG Fei(Hefei University of Technology,Hefei 230009,China;;Anhui Nari Electricity&Electronic Co.,Ltd.,Hefei 230088,China;State Grid Hefei Power Supply Company,Hefei 230022,China)

机构地区：[1]合肥工业大学,安徽合肥230009 [2]安徽南瑞中天电力电子有限公司,安徽合肥230088 [3]国网合肥供电公司,安徽合肥230022

出　　处：《安徽电气工程职业技术学院学报》2018年第1期62-64,共3页Journal of Anhui Electrical Engineering Professional Technique College

摘　　要：介绍了一起因220k V线路断路器非全相运行而导致非全相保护拒动事件,分析了断路器非全相运行是由于电缆绝缘降低造成开关单相偷跳,断路器非全相保护拒动则是由于延时继电器上螺丝松动。最后,剖析了此事件所暴露的问题,并提出整改措施。In this paper,a case of non-full-phase protection rejection due to non-full-phase operation of a 220kV circuit breaker is introduced.Through analysis,it has been found that the non-full-phase operation of the circuit breaker is caused by circuit breaker′s non-fault trip duo to the decrease of the cable insulation,while the non-full-phase protection of the circuit breaker is caused by the loosening of the screw on the time-delay relay.Finally,this paper analyzes the problems exposed in this incident and puts forward some measures for improvement.

关 键 词：断路器偷跳 非全相保护 拒动 整改措施 

分 类 号：TM561[电气工程—电器]