基于双端行波的T型线路故障定位方法  

A Fault Location Method for T-type Line Based on Double-ended Traveling Wave

作　　者：陈启锐 CHEN Qirui(Guangdong Power Grid Corporation Dongguan Changman Power Supply Branch,Dongguan 523841,China)

机构地区：[1]广东电网公司东莞长安供电分局

出　　处：《湖南电力》2019年第4期14-18,共5页Hunan Electric Power

摘　　要：针对现有输电线路双端行波故障定位方法研究的不足,提出一种基于行波线模时间的双端行波定位新方法,通过测量线模首波头到达线路两端的时间,得到与波速无关的故障定位公式。在深入研究T型输电线路故障支路识别和故障点定位的基础上,提出利用T型线路三端线模时间的故障距离方程组和线路固有关系建立的判别方法,直接进行故障支路判别和故障点定位,改变根据支路判别关系推出故障定位公式的传统思路,解决了T节点附近故障时支路判别问题。该方法只利用故障初始行波,便于故障的识别。ATP/EMPT仿真验证所提方法简单可行,定位误差小,具有很高的可靠性。To improve the existing fault location methods in double-ended transmission network,a novel method based on transient traveling wave line model time is presented,which avoids the influence of traveling wave speed.On the basis of researching the principle of double-ended traveling wave fault location and the fault location methods for T-type transmission lines in-depth,a discriminant method based on fault distance equation via using line model time and three lines'inherent relationship to achieve fault branch discrimination and fault location accurately which is different with traditional methods is put forward.Only initial travelling wave is used to identify fault in proposed method.Reliability and high precision are validated by ATP/EMPT simulation results.

关 键 词：T型输电线路 行波定位 线模 小波 

分 类 号：TM733[电气工程—电力系统及自动化]