树型分支电网单相断线兼接地故障特征  

Fault Features of Line Break with Short-Circuitfor Tree-Type Distribution Line

作　　者：韩凤玲[1] 王毅[1] 许承斌[1] 柳焯[1] 

机构地区：[1]哈尔滨工业大学电气工程系

出　　处：《哈尔滨工业大学学报》1998年第2期16-20,共5页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金

摘　　要：当树型分支电网的某一点发生断线兼线地短路时，在只限于起端电压、电流可测的条件下，故障诊断的关键是区分真、伪故障点。真故障点的固有特征是故障位置诊断值误差与故障相及两非＊故障相起端电压、电流相位差的偏差量均成正比。根据此规律，可对各等效短路点进行特征提取和特征识别，正确识别真故障，计算机仿真结果说明了故障点特征识别定位法是有效的。The effects of phase measuring errors on fault resistances of tree-type distribution line when line break with short-circuit have been investigated. The fault position is directly proper- tional to the deviation of phase measuring of fault line and two non-fault lines at the begining of the tree-type distribution line. According to the mathematical relationships, the real one can be distinguished from the false faults after the feature selection when the measuring errors exist.

关 键 词：断线 接地短路 特征提取 故障定位 电网 

分 类 号：TM755[电气工程—电力系统及自动化]