电测与仪表2017，Vol.54Issue(21)：55-60,6.
基于行波固有频率和VMD的T型输电线路故障定位
A fault location method based on traveling wave natural frequencies and VMD for Teed-circuits
摘要
Abstract
The fault location method based on natural frequency of traveling wave for transmission lines can accurately determine the fault position without identifying the wave front of traveling wave and is not restricted by synchronous clock,so it has great advantages.When fault occurs,the fault traveling wave will refract or reflect in fault point and bus bar.As a result,it is difficult to extract the principle component of natural frequency due to the frequency spec-trum aliasing.Upon this foundation,a fault location method based on traveling wave natural frequency and VMD for teed-circuits is presented in this paper.First of all,in order to extract the principle component of natural frequency conveniently,series of intrinsic mode function components are obtained by VMD.Then, by comparing the value of natural frequency component reflecting fault point and T node correspondingly, the fault interval will be determined. Finally,the fault distance is calculated correspondingly the branch boundary conditions.This method can effectively overcome the influence of spectrum aliasing,and identify the fault interval quickly and accurately.EMTDC simulation results show that this method is adaptable and accurate.关键词
故障定位/固有频率/VMD/T型线路Key words
fault location/natural frequencies/VMD/Teed-circuits分类
信息技术与安全科学引用本文复制引用
张媛媛,朱永利,张宁,张蒙,郑艳艳,黄晓胤..基于行波固有频率和VMD的T型输电线路故障定位[J].电测与仪表,2017,54(21):55-60,6.基金项目
中央高校基本科研业务费专项资金资助项目(2014xs74). （2014xs74）
