无需波速和线路长度整定的故障行波定位方法  

A method of traveling wave fault location without setting wave velocity and line length

作　　者：周军珲 杨毅[1] 孙辉军 曾祥君[1] 匡文凯[1] 

机构地区：[1]长沙理工大学智能电网运行与控制湖南省重点实验室,长沙410004 [2]株洲市电业局,湖南株洲412000

出　　处：《电测与仪表》2015年第19期117-122,共6页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金项目(61233008);(51207013);湖南省科技重大专项(2012FJ1003);湖南省高校产业化培育项目(12CY007)

摘　　要：现有输电线路行波故障测距方法由于受行波波速的不确定以及输电线路弧垂的影响,容易出现较大的测距误差。为此,提出了一种无需波速和线路长度整定的线路故障行波定位方法。在线路两端安装行波信号检测装置,记录行波波头到达时间,利用故障距离与故障行波到达检测点的时间差线性关系来确定故障测距结果。理论上该方法有效克服了波速和线路长度的变化对测距结果的影响,比传统的方法具有更高的测距精度,ATP仿真分析和实际应用效果也证明了其正确性。In view of the error range caused by the uncertainty of the wave velocity and the influence of conductor sag,a method of traveling wave fault location without setting wave velocity and line length is proposed. The device of traveling wave signal detection at ends of the line is installed and the head of first wave is recorded. According to the linear relationship of the fault distance and transmission time,the fault location result is obtained. The method is not affected by the wave velocity and the change of line length in theory,and the precision is higher than the traditional method.The ATP simulation result and actual application result also verify its fairly high fault location precision.

关 键 词：输电线路 双端行波法 时间差 距离比 故障测距 

分 类 号：TM77[电气工程—电力系统及自动化]