基于行波模量传输时差的配电网接地故障定位新方法

doi:10.11930.2015.9.67

中国电力 ›› 2015, Vol. 48 ›› Issue (9): 67-72.DOI: 10.11930.2015.9.67

基于行波模量传输时差的配电网接地故障定位新方法

李泽文，周卿松，曾祥君，龙玺，彭翰川

长沙理工大学智能电网运行与控制湖南省重点实验室，湖南长沙 410114

收稿日期:2015-05-19 出版日期:2015-09-25 发布日期:2015-11-25
作者简介:李泽文（1975—），男，湖南石门人，博士，副教授，从事电力系统保护与控制研究。E-mail: lzw0917@163.com
基金资助:
国家自然科学基金资助项目（51377012，51207013）；湖南省自然科学杰出青年基金资助项目（2015JJ1001）；湖南省教育厅重点项目（14A002）；湖南省高校产业化培育资助项目（13CY008）

New Fault Location Method Based on Time Difference of Traveling Wave Mode-component in Distribution Network

LI Zewen, ZHOU Qingsong, ZENG Xiangjun, LONG Xi, PENG Hanchuan

Hunan Province Key Laboratory of Smart Grids Operation and Control, Changsha University of Science and Technology,Changsha 410114, China

Received:2015-05-19 Online:2015-09-25 Published:2015-11-25
Supported by:
This work is supported by the National Natural Science Fund Project(51377012, 51207013), Hunan Province Science Fund for Distinguished Young Scholars(2015JJ1001), Hunan Province Department of Education Key Projects(14A002), Hunan Province Universities Industrialization Cultivation Project of Scientific and Technological Achievements (13CY008).

摘要/Abstract

摘要： 为解决配电网接地故障的定位难题，在分析配电网接地故障行波零模与线模分量传输特性的基础上，提出了一种配电网接地故障定位新方法。该方法采用合适的小波变换标定零线模行波波头，并根据配电网故障行波历史数据拟合零线模时间差与故障距离、零线模时间差与零模波速的对应关系曲线，然后据此关系曲线提出了基于零线模传输时差的故障区段判别方法，最后研究了基于双端行波零模分量的配电网故障精确定位新方法，可在线路接地故障情况下准确判别故障区段并精确计算故障点位置。该方法具有较高的定位准确度，可有效解决配电网接地故障定位难题，仿真分析验证了该方法的有效性和准确性，有望在配电网中得到实际应用。

关键词: 配电网, 接地故障, 行波, 故障定位, 零模, 时间差, 拟合

Abstract: In order to solve the grounding fault location problem of distribution network, a new fault location method for distribution network is presented, which is based on the analysis of transmission characteristics of zero mode component and aerial mode component of traveling wave in distribution network. Firstly, a wavelet transform is utilized to detect zero mode wave front. The relationship between zero-aerial mode component time difference and fault distance, and the relationship between zero-aerial mode component time difference and zero mode velocity are fitted according to the historical fault data. Then, according to the fitting curve, a fault-section detection method is proposed based on transmission time difference of zero-aerial mode component, and a accurate fault location method is researched based on double-ended zero mode components. Simulation results has proved the proposed method’s high accuracy in fault location and effectiveness in solving the grounding fault location problem of distribution network and it is expected to be implemented in real distribution network.

Key words: distribution network, grounding fault, traveling wave, fault location, zero mode, time difference, fitting

中图分类号:

TM771

李泽文，周卿松，曾祥君，龙玺，彭翰川. 基于行波模量传输时差的配电网接地故障定位新方法[J]. 中国电力, 2015, 48(9): 67-72.

LI Zewen, ZHOU Qingsong, ZENG Xiangjun, LONG Xi, PENG Hanchuan. New Fault Location Method Based on Time Difference of Traveling Wave Mode-component in Distribution Network[J]. journal1, 2015, 48(9): 67-72.

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基于行波模量传输时差的配电网接地故障定位新方法

New Fault Location Method Based on Time Difference of Traveling Wave Mode-component in Distribution Network

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模态框（Modal）标题

基于行波模量传输时差的配电网接地故障定位新方法

New Fault Location Method Based on Time Difference of Traveling Wave Mode-component in Distribution Network

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