一种利用行波自然频率的杆塔故障定位新方法  

A Novel Method of Tower Fault Location Using Natural Frequencies of Traveling Wave

作　　者：徐高[1] 龚庆武[1] 李勋 张英杰[1] 

机构地区：[1]武汉大学电气工程学院,湖北省武汉市430072 [2]深圳供电局有限公司,广东省深圳市518001

出　　处：《电力系统自动化》2014年第5期78-82,102,共6页Automation of Electric Power Systems

摘　　要：为解决传统基于行波自然频率的单端故障测距方法在单相或远距离故障时测距精度不高的问题,提出了一种基于行波自然频率的杆塔故障定位新方法,该方法对主自然频率辨识精度不敏感,具备较好的抗差性能,提高了单相或远距离故障情况下的测距效果。通过辨识线路两端故障电流中的主自然频率值,并根据行波主自然频率值与故障距离间的倒数关系,由线路两端的主自然频率值之比,确定故障距离占线路全长的比例。仿真结果表明,所述方法故障定位精度高、稳定性好,定位结果不受季节、弧垂变化及故障距离和故障类型的影响,利于实际现场中故障位置的查找。In order to solve the problem of low accuracy of the single-ended fault location method based on natural frequencies of the traveling wave during single-phase or remote fault,a novel method of tower fault location using natural frequencies of the traveling wave is proposed.This method is not affected by fault types and simply depends on the accuracy of the main natural frequency,while capable of obtaining better fault location results during remote fault.By identifying the main natural frequency of the fault current at both ends of the transmission line,the ratio of the fault distance and the line length can be obtained as the inverse relationship between fault distance and the value of the main natural frequency.Simulation results show that the proposed method is effective and stable.The fault location results are hardly affected by fault distance and the variation of season and sagging in fineness,facilitating fault position confirmation on the spot.

关 键 词：杆塔 故障定位 自然频率 主成分 暂态行波 

分 类 号：TM753[电气工程—电力系统及自动化]