一起用户变电站主变压器低压侧合环导致线路保护误动作实例分析  

Example Analysis of Line Protection Mal-Operation Caused by User Closing on Low Voltage Side

作　　者：王刚 常荆华 肖智刚 谢凌博 张一欣 WANG Gang;CHANG Jinghua;XIAO Zhigang;XIE Lingbo;ZHANG Yixin(State Grid Xianyang Power Supply Company,Xianyang,Shaanxi 712000,China)

机构地区：[1]国网咸阳供电公司,陕西咸阳712000

出　　处：《东北电力技术》2021年第10期53-55,共3页Northeast Electric Power Technology

摘　　要：借助故障录波装置波形对一起110 kV线路距离保护误动作原因进行分析,结果为相邻用户变电站未按照调度运行方式安排,私自进行主变压器低压侧合环运行,导致末端无源线路距离保护动作。并用短路电流计算验证分析的合理性,为电力运行人员快速分析故障提供参考。The cause of a 110 kV line distance protection operation is analyzed with the help of the fault recorder.The cause of the distance protection mal-operation of the end passive line is found:the adjacent user substation is not arranged according to the dispatching operation mode,and the transformer is privately closed on low-voltage side.It causes terminal passive line distance protection action.The short-circuit current calculation is used to verify the rationality of the analysis and provides reference for the power operators to quickly analyze the fault.

关 键 词：保护误动作 波形分析 低压侧合环 短路电流计算 

分 类 号：TM774[电气工程—电力系统及自动化]