电力系统自动化2018，Vol.42Issue(9)：195-200,6.DOI:10.7500/AEPS20170817005
基于并联电阻扰动信号的配电网故障定位方法分析
Analysis on Distribution Network Fault Location Method Based on Parallel Resistance Disturbed Signal Inj ection
摘要
Abstract
The distribution network fault location based on parallel resistance disturbed signal inj ection is realized by tracking and diagnosing the disturbed signal.It has been widely used in distribution network fault location.However,in practical application,this method has the problem of uncertainty characteristics of the current variation,which causes the fault location device to misjudge.Therefore,this paper establishes the equivalent circuit of the small current grounding system,deeply studies the variation of the fault current after the disturbed signal inj ected through different non-faulty phases,and analyzes the influence of the load current and the grounding transition resistance.The theory of the effective fault location technology based on parallel resistance disturbed signal is demonstrated.It is proposed that the disturbed signal should be inj ected through the lagging phase of the fault phase in the ungrounded neutral sysytem or undercompensated arc-supperssion-coil-ground neutral system.The disturbed signal should be injected through the ahead phase of the fault phase in the overcompensated arc-suppression-coil-ground neutral system.The simulation results prove the correctness of the optimization method.关键词
小电流接地系统/单相接地故障/扰动信号/故障定位Key words
small current grounding system/single-phase grounding fault/disturbed signal/fault location引用本文复制引用
齐郑,庄舒仪,刘自发,姚志璋,张羽翘..基于并联电阻扰动信号的配电网故障定位方法分析[J].电力系统自动化,2018,42(9):195-200,6.基金项目
国家重点研发计划资助项目(2016YFB0900105).This work is supported by National Key R&D Program of China(No.2016YFB0900105). （2016YFB0900105）
