一起架空输电线路导线断线故障分析  

Failure Analysis of an Overhead Transmission Line

作　　者：王津 王文卓 徐浩 彭鹏 张发刚 WANG Jin;WANG Wen-zhuo;XU Hao;PENG Peng;ZHANG Fa-gang(State Grid Gansu Electric Power Research Institute,Lanzhou Gansu 730070,China;State Grid Gansu Electric Power Company,Lanzhou Gansu 730030,China)

机构地区：[1]国网甘肃省电力公司电力科学研究院,甘肃兰州730070 [2]国网甘肃省电力公司,甘肃兰州730030

出　　处：《机械研究与应用》2022年第1期203-205,210,共4页Mechanical Research & Application

摘　　要：针对某330 kV架空输电线路一次故障过程,通过力学计算、材质试验、运行状况分析,得出该线路导线具备原生缺陷的结论,验证了此次故障是由于外部运行条件发生变化,引起原生缺陷严重程度加大所造成。通过此次分析以及计算、试验结果,找到了导线断线故障原因分析方法,可用于指导输电线路运行单位导线断线故障的准确判断。In this paper,according to failure process of a 330 kV overhead transmission line,through mechanical calculation,material test and operation condition analysis,it is concluded that the conductor of the line has primary defects.It is verified that the fault is caused by increase of the severity of primary defects due to the change of external operation conditions.Through the analysis,calculation and test results,the cause analysis method of conductor break fault is found,which can be used to guide the transmission line operation unit to accurately judge the cause of tripping operation.

关 键 词：故障跳闸 覆冰荷载 原生缺陷 金属疲劳 

分 类 号：TM621.5[电气工程—电力系统及自动化]