基于时间反演技术的电力电缆单相接地故障测距方法

doi:10.3969/j.issn.1000-7229.2015.03.013

电力建设 ›› 2015, Vol. 36 ›› Issue (3): 77-81.doi: 10.3969/j.issn.1000-7229.2015.03.013

基于时间反演技术的电力电缆单相接地故障测距方法

李鸿1，韩聪1，陈德超2

1.长沙理工大学，长沙市 410114；2.国网江西省电力公司赣东北供电分公司, 江西省乐平市 333300

出版日期:2015-03-01
作者简介:李鸿（1962），男，博士，教授，主要研究方向为智能检测与控制技术；韩聪（1987），男，硕士研究生，主要研究方向为电力电缆路径智能检测、智能电网故障定位；陈德超（1988），男，硕士，主要从事输电运维工作。

Single-Phase Grounding Fault Location Method for Power Cable Based on Time-Reversal Technology

LI Hong1, HAN Cong1, CHEN Dechao2

1. Changsha University of Science and Technology, Changsha 410114, China; 2.Northeast of Jiangxi Electric Power Supply

Company, State Grid Jiangxi Electric Power Company, Leping 333300, Jiangxi Province, China

Online:2015-03-01

摘要/Abstract

摘要：

提出了一种基于时间反演技术的电力电缆单相接地故障测距新方法，当电力电缆发生单相接地故障时，利用电压波动方程时间反演的对称性，将在线路终端采集到的时域电压波反演成等效电流行波并传回输电线路，计算出各假定故障点的电流能量值，根据时间反演的时间-空间同步聚焦特性，确定故障点到线路终端的距离。Matlab仿真验证表明，该方法能够准确有效地实现电力电缆单相接地的故障测距，不但适用于不同过渡电阻的接地故障，而且具有收敛速度快，测距精度高等优点。

关键词: 单相接地故障, 时间反演, 假定故障点, 过渡电阻

Abstract:

This paper proposed a new location method for the single-phase grounding fault of power cable based on time-reversal technology. When the single-phase grounding fault of power cable occurred, this method used the time-reversal symmetry of voltage wave equation, inverted the time-domain voltage wave collected at the line terminals into an equivalent current wave and returned it to the transmission line; then calculated the energy value of the current through the assumed fault point, determined the distance of fault point to the line terminal based on the time-space synchronization focusing properties. Matlab simulation results show that the method can accurately and effectively achieve the single-phase grounding fault location of power cable, and not only be applicable to the ground faults with different fault resistances, also have the characteristics of fast convergence speed and high fault location precision.

Key words: single-phase grounding fault, time-reversal, assumed fault point, transition resistance

李鸿，韩聪，陈德超. 基于时间反演技术的电力电缆单相接地故障测距方法[J]. 电力建设, 2015, 36(3): 77-81.

LI Hong, HAN Cong, CHEN Dechao. Single-Phase Grounding Fault Location Method for Power Cable Based on Time-Reversal Technology[J]. ELECTRIC POWER CONSTRUCTION, 2015, 36(3): 77-81.

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基于时间反演技术的电力电缆单相接地故障测距方法

Single-Phase Grounding Fault Location Method for Power Cable Based on Time-Reversal Technology

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