高压电器2018，Vol.54Issue(1)：57-63,7.DOI:10.13296/j.1001-1609.hva.2018.01.009
基于相位比较的多端输电线路故障定位研究
Research of Fault Location for Multi-terminal Transmission Lines Based on Phase Comparison
摘要
Abstract
Due to the defects of existing fault location methods for multi-terminal transmission lines,such as the fault branches judgement algorithms are too complex and tedious to implement,a new fauh location method based on phase comparison is presented.In this scheme,transmission lines are classified into branch and artery section,and the phase differences are determined by comparing the phase between two measurements which installed in the lines using Kaiser windows FFT.Secondly,the wave velocity is obtained by the ratio of the length of the non-fault interval to the time difference between and the fault traveling wave detected at both ends.Based on double-terminal traveling wave theory,the final fault location can be achieved.This method can judge the fault interval and fault phase exactly,on the base of overcoming the defect of the dead zone near T node,and eliminating the influence of the wave velocity uncertainty on the positioning results.EMTDC simulation shows that this method is applicable and accurate.关键词
故障定位/多端线路/相位比较/多测点/双端行波原理Key words
fault location/multi-terminal transmission lines/phase comparison/multiple measurements/double-terminal traveling wave theory引用本文复制引用
张媛媛,朱永利,张宁,张蒙,黄晓胤..基于相位比较的多端输电线路故障定位研究[J].高压电器,2018,54(1):57-63,7.基金项目
中央高校基本科研业务费专项资金资助项目(2014xs74).Project Supported by the Fundamental Research Funds for the Central Universities(2014xs74). （2014xs74）
