基于线路参数灵敏度的EMTR配网故障定位性能影响分析

王科; 胡逸; 徐肖伟; 杨庆

doi:10.13296/j.1001-1609.hva.2026.06.013

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基于线路参数灵敏度的EMTR配网故障定位性能影响分析

研究与分析 | 更新时间：2026-06-10

- 基于线路参数灵敏度的EMTR配网故障定位性能影响分析
- Performance Impact Analysis of EMTR-based Fault Location in Distribution Networks Considering Line Parameter Sensitivity
- 高压电器 2026年62卷第6期页码：105-112
- 作者机构：
  
  云南电网有限责任公司电力科学研究院，昆明 650220
  重庆大学输变电装备技术全国重点实验室，重庆 400044
- 作者简介：
  
  王科（1982—），男，硕士，高级工程师，研究方向为配电一次设备的监测、带电和在线检测技术应用研究（E-mail：41872645@qq.com）。
  胡逸（1998—），男，硕士研究生，主要研究方向为配电网故障定位（E-mail：202111021013@cqu.edu.cn）。
  徐肖伟（1983—），男，高级工程师，研究方向为高电压试验技术、变压器状态评估（E-mail：40858480@qq.com）。
  杨庆（1981—），男，博士，教授，研究方向为电力系统过电压及其绝缘配合、复杂环境下输电线路外绝缘特性及放电机理研究（通信作者）（E-mail：yangqing@cqu.edu.cn）。
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2026.06.013
  中图分类号：
- 收稿：2025-11-08，
  
  修回：2026-01-20，
  
  纸质出版：2026-06-16
- 稿件说明：
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王科, 胡逸, 徐肖伟, 等. 基于线路参数灵敏度的EMTR配网故障定位性能影响分析[J]. 高压电器, 2026,62(6):105-112.

WANG Ke, HU Yi, XU Xiaowei, et al. Performance Impact Analysis of EMTR-based Fault Location in Distribution Networks Considering Line Parameter Sensitivity[J]. High Voltage Apparatus, 2026, 62(6): 105-112.
王科, 胡逸, 徐肖伟, 等. 基于线路参数灵敏度的EMTR配网故障定位性能影响分析[J]. 高压电器, 2026,62(6):105-112. DOI： 10.13296/j.1001-1609.hva.2026.06.013.

WANG Ke, HU Yi, XU Xiaowei, et al. Performance Impact Analysis of EMTR-based Fault Location in Distribution Networks Considering Line Parameter Sensitivity[J]. High Voltage Apparatus, 2026, 62(6): 105-112. DOI： 10.13296/j.1001-1609.hva.2026.06.013.

摘要

文中提出了一种基于故障电流能量镜像最小值的电磁时间反演故障定位方法，但目前该方法要求反向阶段建立的仿真模型与正向阶段故障时的实际线路模型参数保持一致，从而限制了其在实际中的应用。因此基于该方法在正向阶段和反向阶段模型参数的差异，文中利用PSCAD仿真软件搭建了10 kV配电网线路模型并对其进行频域理论推导，通过仿真分析了不同线路参数灵敏度下该方法的定位性能，并搭建了同轴电缆试验模型进行验证。结果表明：①相比于正向阶段的线路电感参数，当反向阶段的线路电感参数设置在0.95～1.1倍范围内，该方法都能够实现高阻接地故障定位；②该方法可实现实际发生未知接地故障电阻的精确定位，且为提高其整体的定位性能，建议在反向阶段线路横向分支中设置高阻假想接地故障；③通过搭建的同轴电缆试验模型分析了故障阻抗未知情况下对方法故障定位性能的影响，综合故障定位误差最大为5 m。

Abstract

In this paper

an an electromagnetic time reversal fault location method based on the minimum mirror value of fault current energy is proposed. However

this method currently requires that the simulation model set up during the reverse stage to be consistent with the actual line model parameters at the time of the fault during the forward stage

which limits its practical application. Therefore

based on the discrepency in model parameters between the forward and reverse stages of this method

the PSCAD simulation software is used in this paper to set up a 10 kV distribution network line model and its frequency-domain theoretical derivation is conducted .Through simulation

the loalization performance of this method under different line parameter sensitivities is analyzed

and a coaxial cable experimental model is constructed for validation. The results show that：①When the line inductance parameters in the reversed stage are adjusted in the range of 0.95 times to 1.1 times compared to the line inductance parameters in the direct stage

the method is able to accomplish ground fault location with high resistance.②The method can achieve accurate location of the real occurrence of an unknown ground fault resistance

and it is suggested that a high-resistance fictitious ground fault can be set in the line's lateral branch in the reversed stage so to increase its overall location performance.③Using the constructed coaxial cable test model

the impact of unknown fault impedance on the fault location performance of the method is analyzed

with a maximum comprehensive fault localization error of 5 m.

关键词

Keywords

references

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