摘要
输电线路重合闸对提高电网的安全稳定性具有重要作用,重合闸未正确动作会造成线路停运、负荷损失。本文对220kV园区变电站两条35kV线路跳闸后重合闸动作不成功的故障进行研究,分析线路跳闸及重合闸失败的原因。针对保护装置跳闸后重合闸动作失败且跳、合位灯同时亮起的情况,在排除二次回路故障原因后,提供一种从装置操作板件查找问题的思路,确认板件上合闸位置继电器动作后未返回是本次故障的直接原因。最后针对此类缺陷提出相应的整改措施,有效提高了二次设备运行的可靠性。
Transmission line reclosing plays an important role in improving the safety and stability of the power grid.Incorrect operation of reclosing will cause line outages and load loss.This paper studies the failure of reclosing action after the tripping of two 35kV lines in 220kV substation,and analyzes the reasons for line tripping and reclosing failure.In view of the situation that the reclosing action of the protection device fails and the trip position lamp lights up at the same time after the tripping of protection device,after excluding the cause of the secondary circuit failure,a perspective is provided to find the problem from the device operation panel.The closing position relay on the board does not return after the action is the direct cause of this failure.Finally,corresponding rectification measures are proposed for such defects,which effectively improve the reliability of the secondary equipment operation.
作者
吴笑天
徐新
陆飞
印吉景
WU Xiaotian;XU Xin;LU Fei;YIN Jijing(State Grid Taizhou Electric Power Company,Taizhou,Jiangsu 225306)
出处
《电气技术》
2021年第11期69-72,83,共5页
Electrical Engineering
关键词
线路保护
重合闸
操作回路
接地故障
line protection
reclosing
operating circuit
ground fault
