摘要
对某35kV开关站送出线路故障进行了分析,发现多回送出回路敷设方式不正确极易造成相间电流不平衡,进而引起电站跳闸事故.多回送出线路在采取“品”字形布置及合理的敷设方式后,能有效避免相间电流不平衡,避免零序电流动作,可有效防止电站跳闸事故发生.
Based on an analysis of transmission line fault in a 35 kV switching station,it is found that the improper laying mode of multi-circuit transmission circuit can easily cause imbalance of interphase current,and then cause tripping accidents of power stations.After adopting the layout of "品" shape and reasonable laying mode,multi-circuit transmission line can effectively avoid imbalance of interphase current,avoid zero sequence current action,and effectively prevent the occurrence of tripping accidents in power stations.
作者
岳克明
刘珊
杨华
YUE Keming;LIU Shan;YANG Hua(Shanxi Electric Power Engineering Co.,Ltd.of China Energy Engineering Group,Taiyuan,Shanxi 030001,China;Electric Power Research Institute of State Grid Shanxi Electric Power Company,Taiyuan,Shanxi 030001,China)
出处
《山西电力》
2020年第6期59-61,共3页
Shanxi Electric Power
关键词
多回送出线路
相间电流不平衡
跳闸事故
电缆敷设
multi-circuit transmission line
imbalance of interphase current
tripping accidents
cable laying
