一起方向过流保护误动作的原因分析及对策  

Cause Analysis and Countermeasures for a Maloperation of Directional Over-Current Protection

作　　者：陈龙 叶影 杨晓林 CHEN Long;YE Ying;YANG Xiaolin(State Grid Jinshan Power Supply Company,SMEPC,Shanghai 200540,China)

机构地区：[1]国网上海市电力公司金山供电公司,上海200540

出　　处：《电力与能源》2018年第6期773-776,800,共5页Power & Energy

摘　　要：介绍了一起35kV开关站所供用户侧变压器充电时产生励磁涌流导致系统侧含有分布式电源的35kV开关站进线方向过流保护误动作经过。从原理上详细分析了事故发生的原因,并对今后如何预防这类事故提出了有效的解决方案。This paper introduces a maloperation of directional overcurrent protection in a 35 kV switch station with distributed power supply when the transformer on the user side of the 35 kV switch station was on charge,the magnetizing inrush current was generated.The causes of accidents are analyzed in detail,and effective solutions are put forward to prevent such accidents in the future.

关 键 词：保护误动 励磁涌流 方向过流保护 分布式电源 

分 类 号：TM77[电气工程—电力系统及自动化]