高压电力电缆配电线路故障在线检测方法研究  

Study on fault online detection method of distribution line of high voltage power cable

作　　者：章以建[1] ZHANG Yijian(Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学

出　　处：《现代电子技术》2019年第18期10-13,共4页Modern Electronics Technique

基　　金：浙江省科技厅项目(2014C32031)~~

摘　　要：为了解决高压电力电缆配电线路供电过程发生接地故障时,配电线路无法正常供电的问题,提出一种基于行波故障测距原理的高精度、快速度的线路故障在线检测方法.检测已知故障行波速度、未知故障行波速度以及高压电力电缆配电线路故障发生位置,通过在高压电力电缆配电线路故障位置处安装电容器向故障回路放电,故障回路包括电容器、配电线路和故障点过渡串联电阻,通过该回路的特征频率和衰减系数故障位置线路两端的电阻,得到线路故障信息.仿真实验结果表明,该检测方法具有较高精度.In order to solve the problem that the normal power supply of distribution lines can not be achieved,when a grounding fault occurs in the power supply process of high-voltage power cable distribution lines,a high-accuracy and high-speed fault online detection method based on the principle of traveling wave fault range-finding is proposed to detect the known traveling wave velocity,unknown traveling wave velocity and fault location of distribution line of high-voltage power cable. The fault information of the line can be obtained by the capacitor installed at the fault location of high-voltage power cable distribu- tion line to discharge to the fault loop circuit,and by the characteristic frequency and attenuation coefficient of the loop circuit which includes capacitor,distribution line and fault point transition series resistance. The simulation results indicate that the method has high accuracy.

关 键 词：高压电力电缆 配电线路 故障在线检测 行波速度检测 故障位置检测 实验分析 

分 类 号：TN47.34[电子电信—微电子学与固体电子学] TM274[一般工业技术—材料科学与工程]