一起输电线路工频变化量阻抗元件越级跳闸动作分析  

Analysis of a Power Frequency Variation Impedance Element Skipping Trip Action on Transmission Line

作　　者：谭华 TAN Hua(Huaneng Lancang River Hydropower Inc.,Overhaul Branch,Kunming 650051,China)

机构地区：[1]华能澜沧江水电股份有限公司检修分公司,云南昆明650051

出　　处：《云南水力发电》2023年第7期233-236,共4页Yunnan Water Power

摘　　要：从某水力发电厂500 kV升压站发生的一起因电压回路接线错误导致线路保护工频变化量阻抗元件越级跳闸的事件出发,介绍了现场检查处理方式、保护动作原理,分析故障原因,在此基础上,从专业运行管理角度研究了电压二次回路现场检测方法,并提出对后续电力设备的安全稳定运行以及继电保护二次回路检修维护方面的意见建议。The 500 kV booster station of a certain hydropower plant tripped due to a voltage circuit wiring error,which caused the impedance component of the line protection power frequency change to exceed the level.This paper introduces on-site inspection and handling methods,protection action principles,and analyzes the causes of faults.On this basis,on-site detection methods for voltage secondary circuits are studied from the perspective of professional operation management,and suggestions are proposed for the safe and stable operation of subsequent power equipment and maintenance of relay protection secondary circuits.

关 键 词：电压互感器 工频变化量 阻抗元件 线路保护 二次回路 

分 类 号：TV734.3[水利工程—水利水电工程] TV737