带T接分支的电缆-架空线混合线路双端行波故障定位  

Double Terminal Traveling Wave Fault Location for Cable and Overhead Hybrid Distribution Lines with T Branches

作　　者：蔡俊强 孙二双 杨子力 CAI Junqiang;SUN Ershuang;YANG Zili(Qujing Power Supply Bureau,Yunnan Power Grid Co.,Ltd.,Qujing 655000,China)

机构地区：[1]云南电网有限责任公司曲靖供电局,云南曲靖655000

出　　处：《电工技术》2018年第21期37-40,43,共5页Electric Engineering

摘　　要：针对带有T接分支的电缆-架空线混合线路,提出基于区间分割的双端行波故障定位方法。首先分别计算行波由线路首端测量点、沿线各分支点、电缆-架空线连接点及线路首端测量点传播至线路两端测量点的时间差值,并作为整定值序列。当线路发生故障时,将实际测得的故障初始行波浪涌传播至线路两端的时间差值与整定值序列比较即可确定故障区段。若故障点位于主干线,还可进一步计算出故障点到线路两端测量点的距离。仿真结果表明了混合线路双端行波故障定位方法的可行性。To the cable overhead hybrid distribution line with T-junction,a double terminal traveling wave fault location method based on interval segmentation was proposed.First,the time difference of traveling wave from the head end of the line,the branch points along the line,the cable-overhead connection point,and the measurement point at the head end of the line to the measuring points at both ends of the line were calculated and it was used as the setting value sequence.When the line failed,the fault section could be determined by comparing the time difference of the actual measured initial wave of the fault to the double ends of the line and the set value sequence.If the fault point was located on the main line,the distance from the point of failure to the measurement point at both ends of the line could be further calculated.Simulation results showed that the proposed method was feasible for the fault location of double terminal traveling wave in hybrid distribution lines.

关 键 词：混合线路 分支线路 行波 故障定位 

分 类 号：TM727[电气工程—电力系统及自动化]