基于VMD行波信号特征分析的含DG配电网故障测距方法  

Fault Location Method of Distribution Network with DG Based on VMD Traveling Wave Signal Feature Analysis

作　　者：陈亮 CHEN Liang(State Grid Shandong Electric Power Company Shenxian Power Supply Company,Liaocheng 252400,China)

机构地区：[1]国网山东省电力公司莘县供电公司,山东聊城252400

出　　处：《电工技术》2024年第24期176-178,181,共4页Electric Engineering

摘　　要：为提高含DG配电网故障测距的准确性与可靠性,实时捕捉行波信号中的细微变化,基于VMD行波信号特征分析,开展了含DG配电网故障测距方法研究。首先,采集含DG配电网故障信号,并进行滤波和放大预处理;其次,利用VMD信号处理技术,对含DG配电网行波信号特征作出分析,提取反映行波信号特征的关键参数;在此基础上,根据VMD特征分析结果,基于特征参数和线路参数的数学模型,进行故障测距。实验结果表明,应用提出方法后,测距结果更加接近故障点实际所在位置,测距误差较小,测距精度、准确性与可靠性较高。In order to improve the accuracy and reliability of fault location in distribution network including DG,and to capture the subtle changes in the traveling wave signal in real time,the method of fault location in distribution network including DG was studied based on the characteristics analysis of VMD traveling wave signal.Firstly,the fault signals of distribution network including DG are collected,filtered,amplified and pre-processed.Secondly,VMD signal processing technology is used to analyze the characteristics of the traveling wave signal of the distribution network including DG,and the key parameters reflecting the characteristics of the traveling wave signal are extracted.On this basis,according to the results of VMD feature analysis,fault location is carried out based on the mathematical model of feature parameters and line parameters.The experimental results show that after the proposed method is applied,the ranging results are closer to the actual location of the fault point,the ranging error is small,the ranging accuracy is higher,and the accuracy and reliability advantages are significant.

关 键 词：VMD 行波信号 DG 配电网 故障 测距 

分 类 号：TM721[电气工程—电力系统及自动化]