Research of Fault Location for Multi-terminal Transmission Lines Based on Phase Comparison

ZHANG Yuanyuan; ZHU Yongli; ZHANG Ning; ZHANG Meng; HUANG Xiaoyin

doi:10.13296/j.1001-1609.hva.2018.01.009

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Research of Fault Location for Multi-terminal Transmission Lines Based on Phase Comparison

更新时间：2025-04-26

- Research of Fault Location for Multi-terminal Transmission Lines Based on Phase Comparison
- High VoltageApparatus Vol. 54, Issue 1, Pages: 57-63(2018)
- 作者机构：
  
  1. 华北电力大学电气与电子工程学院
  2. 冀北电力公司检修分公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2018.01.009
  CLC： TM75
- Published：2018
- 稿件说明：
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[1]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(01):57-63.

ZHANG Yuanyuan, ZHU Yongli, ZHANG Ning, et al. Research of Fault Location for Multi-terminal Transmission Lines Based on Phase Comparison[J]. High voltageapparatus, 2018, 54(1): 57-63.
[1]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(01):57-63. DOI： 10.13296/j.1001-1609.hva.2018.01.009.

ZHANG Yuanyuan, ZHU Yongli, ZHANG Ning, et al. Research of Fault Location for Multi-terminal Transmission Lines Based on Phase Comparison[J]. High voltageapparatus, 2018, 54(1): 57-63. DOI： 10.13296/j.1001-1609.hva.2018.01.009.

摘要

当前的多端输电线路故障支路判定方法复杂、繁琐、不易实现。为此

提出一种基于相位比较的多端输电线路故障定位方法。该方法在输电线路上装设多个测点

将多端线路模型看作一条主干线路与若干分支线路的集合

通过加Kaiser窗的FFT算法

比较相应线路上测点之间的相位差

再利用非故障区间长度与两端测点检测到的故障行波时间差的比值求得波速

最后根据双端行波原理计算出故障点位置。该方法能够准确的判定出故障区间与故障相别

在克服T节点附近存在测距死区的基础上

消除了波速不确定对定位结果的影响。EMTDC仿真结果表明

该方法适用性强

定位精度高。

Abstract

Due to the defects of existing fault location methods for multi-terminal transmission lines

such as thefault branches judgement algorithms are too complex and tedious to implement

a new fault location method based onphase comparison is presented. In this scheme

transmission lines are classified into branch and artery section

andthe phase differences are determined by comparing the phase between two measurements which installed in the linesusing Kaiser windows FFT. Secondly

the wave velocity is obtained by the ratio of the length of the non-fault intervalto the time difference between and the fault traveling wave detected at both ends. Based on double-terminal travelingwave theory

the final fault location can be achieved. This method can judge the fault interval and fault phaseexactly

on the base of overcoming the defect of the dead zone near T node

and eliminating the influence of the wavevelocity uncertainty on the positioning results. EMTDC simulation shows that this method is applicable and accurate.

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