高压架空输电线路暂态电流行波故障检测方法研究  

Research on fault detection method of transient current traveling wave for high voltage overhead transmission line

作　　者：李勇 LI Yong(Yancheng Power Supply Branch of State Grid Jiangsu Electric Power Company,Yancheng 224000,China)

机构地区：[1]国网江苏省电力有限公司盐城供电分公司,江苏盐城224000

出　　处：《电子设计工程》2021年第2期155-158,163,共5页Electronic Design Engineering

摘　　要：针对传统的输电线路故障检测结果误差较大、检测过程受外界影响较大的问题,设计了高压架空输电线路暂态电流行波故障检测方法。采集高压架空输电线路故障区域暂态行波信号的时域和频域特征,结合小波分析法分析暂态电流行波特征的多分辨率;根据特征分析结果有效分解并重构暂态电流行波的小同频段数值,并完成对高压架空输电线路三相暂态电流行波故障类别的判断。在此基础上,通过对行波线路传播波速等过程实现对输电线路暂态电流行波故障的检测。实验结果表明,该检测方法的故障检测结果精准度较高,且检测过程耗时短、抗干扰性强,证明该方法具有明显的应用优势。In order to solve the problem that the fault detection results of traditional transmission lines are more error and the detection process is more influenced by the outside world,the transient current wave fault detection method of overhead transmission lines is designed in this paper.The time-domain and frequency-domain characteristics of transient traveling wave signal in fault region of high-voltage overhead transmission lines are collected and the multi-resolution of transient current wave character is analyzed by combining wavelet analysis.According to the characteristic analysis results,the values of transient EMP are decomposed and reconstructed effectively,and the fault types of three-phase EMP of high-voltage overhead transmission lines are judged.On this basis,the fault detection of transient EMP of transmission lines is realized through the propagation velocity of traveling wave lines and other processes.The experimental results show that this method has high accuracy,short time and strong anti-interference,which proves that this method has obvious advantages in application.

关 键 词：高压架空输电线路 暂态电流行波 故障检测 电路检修 

分 类 号：TN7[电子电信—电路与系统]