基于离散求导法的铁路电力线路故障行波波头识别新算法  

New algorithm of fault traveling-wave head recognition in railway power transmission line based on discrete derivation

作　　者：吴仲朗[1] 周书民[1] 汪志成[1] 仇亚军[1] 何浩华[1] 

机构地区：[1]东华理工大学机械与电子工程学院,江西南昌330013

出　　处：《电力系统保护与控制》2013年第13期54-57,共4页Power System Protection and Control

基　　金：江西省科技计划项目(20121BBG70062;20122BBE500045)

摘　　要：为了识别用于铁路电力线路故障测距的行波波头,提出一种新的算法。基于现有的离散信号处理中,以差分形式的求导方法来检测行波信号的突变。并在此基础上结合模极大值法和设立的阈值约束判定函数,克服离散求导法适应性弱的缺点,精确识别铁道电力线路故障点位置。该算法原理简单,计算量小。应用于现场实测故障数据的分析,结果表明:该方法正确、有效,具有很高的可靠性,其绝对测距误差不超过100m。In order to recognize traveling-wave head in railway power transmission line, this paper puts forward a new algorithm. Based on the existing discrete signal processing, singularity detection of traveling-wave signals is realized through the derivation method in the difference form. Through combination of the modulus maxima method with the threshold constraint decision function, the weak adaptability of the discrete derivation is overcome and the fault point location is identified accurately. The algorithm has simple principle and small amount of calculation. Recorded on-site data show that the proposed algorithm is correct and effective, and it possesses high reliability with absolute distance-measuring error of no more than 100 m.

关 键 词：铁道电力线路 故障测距 离散求导 行波波头 

分 类 号：TM755[电气工程—电力系统及自动化]