输电线路组合行波测距方法研究  

Research of combined traveling wave's fault location method on transmission lines

作　　者：王奎鑫[1,2] 祝成 孙佳佳[4] 陈平[1] 

机构地区：[1]山东理工大学电气与电子工程学院,山东淄博255049 [2]临沂供电公司,山东临沂276000 [3]德州供电公司,山东德州253000 [4]山东电力工程咨询院有限公司,山东济南250013

出　　处：《电力系统保护与控制》2012年第15期82-86,共5页Power System Protection and Control

摘　　要：分析了输电线路故障后行波的传播过程以及行波折、反射的现象。在此基础上,提出了一种基于两种行波原理相组合的故障测距方法。用单端原理进行初步故障测距,结合故障初始行波到达线路两侧的时间差由单端原理给出准确结果。该方法的优点在于得到的测距结果是单端原理的结果,消除了双端原理测距中线路长度误差及线路两侧准确时间同步问题对测距精度的影响,进而提高了测距准确性与可靠性。ATP仿真表明,所提出的输电线路组合行波故障测距方法是可行的,并且故障测距的精度得到明显提高。For transmission lines, the paper analyzes the wave propagation process and the wave＇s refraction and reflection phenomena after the failure. On this basis, the paper proposes fault location method combining two traveling waves＇ theories. First, single-ended location principle is used to give preliminary fault location. And then the accurate results are given by single-ended principles combining with initial wave arrival time difference at both ends. The advantage of this method is that the results are obtained by single-ended location principle, eliminating the line length＇s error and the influence on location accuracy from circuit accurate time synchronization on both sides in double-ended principle location method so as to improve the accuracy and reliability of location. ATP simulations show that the combined traveling wave fault location scheme of transmission lines is feasible and fault location accuracy is improved obviously.

关 键 词：输电线路 行波 单端原理 双端原理 故障测距 

分 类 号：TM773[电气工程—电力系统及自动化]