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.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
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
关键词
断线
接地短路
特征提取
故障定位
电网
Line break with short-circuit: feature selection
fault location
fault resistance
