Fault location method for distribution networks based on traveling wave transfer function difference matrix

LIAO Weiping; WANG Weiping; WEN Aihui; LI Xinhai; CHEN Jiawei

doi:10.11930/j.issn.1004-9649.202511009

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Fault location method for distribution networks based on traveling wave transfer function difference matrix

更新时间：2026-07-31

- Fault location method for distribution networks based on traveling wave transfer function difference matrix
- Vol. 59, Issue 7, Pages: 55-65(2026)
- 作者机构：
  
  1. 广东电网有限责任公司电力科学研究院
  2. 广东电网有限责任公司中山供电局
  3. 长沙理工大学电网防灾减灾全国重点实验室
- 作者简介：
- 基金信息：
- DOI：10.11930/j.issn.1004-9649.202511009
  CLC：
- Published：2026
- 稿件说明：
移动端阅览
廖卫平, 王伟平, 温爱辉, 等. 基于行波传递函数差异矩阵的配电网故障定位方法[J]. 中国电力, 2026, 59(7): 55−65.

LIAO Weiping, WANG Weiping, WEN Aihui, et al. Fault location method for distribution networks based on traveling wave transfer function difference matrix[J]. 2026, 59(7): 55-65.
廖卫平, 王伟平, 温爱辉, 等. 基于行波传递函数差异矩阵的配电网故障定位方法[J]. 中国电力, 2026, 59(7): 55−65. DOI： 10.11930/j.issn.1004-9649.202511009

LIAO Weiping, WANG Weiping, WEN Aihui, et al. Fault location method for distribution networks based on traveling wave transfer function difference matrix[J]. 2026, 59(7): 55-65. DOI： 10.11930/j.issn.1004-9649.202511009.

摘要

配电网中架空线路参数随频段不同而存在差异，导致传统假设线路参数恒定的故障定位方法精度显著下降。针对上述问题，首先分析配电网线路参数随频率变化的机理，充分考虑集肤效应对线路参数的影响；然后以线路传递函数差异矩阵为变量，将故障定位问题转换成优化求解问题；最后提出一种基于行波传递函数差异矩阵的配电网故障定位方法。在PSCAD中搭建典型不平衡配电网场景，对各种故障工况进行模拟。仿真结果表明，该方法能够有效克服现有行波受线路参数频变的影响，多数工况下误差在60 m以内，为配电网故障定位提供新的思路。

Abstract

In distribution networks

the parameters of overhead lines vary with different frequency bands

which significantly reduces the accuracy of traditional fault location methods that assume constant line parameters. To address this issue

firstly

the mechanism of frequency-dependent variation of distribution line parameters is analyzed

with full consideration of the influence of the skin effect on line parameters. Then

the line transfer function difference matrix is used as a variable to convert the fault location problem into an optimization solution problem. Finally

a distribution network fault location method based on the traveling wave transfer function difference matrix is proposed. A typical unbalanced distribution network scenario is built in PSCAD to simulate various fault conditions. The simulation results show that the proposed method can effectively overcome the influence of frequency-dependent line parameters on existing traveling waves

with an error within 60 m under most operating conditions

which provides a new idea for distribution network fault location.

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