基于原子分解和行波自然频率的单端故障测距方法  

Single-terminal fault location based on atomic decomposition and natural frequency of traveling wave

作　　者：徐高[1] 龚庆武[1] 李勋[1] 张英杰[1] 

机构地区：[1]武汉大学电气工程学院,湖北武汉430072

出　　处：《电力自动化设备》2014年第5期133-138,共6页Electric Power Automation Equipment

基　　金：国家"十一五"科技支撑计划资助项目(2013BAA-02B01)~~

摘　　要：提出了一种基于原子分解和行波自然频率的单端故障测距方法,首先采用FIR滤波器对故障电流进行滤波,得到主自然频率粗略成分,再运用原子分解算法辨识出主自然频率粗略值,利用该频率值反馈调整FIR滤波器的参数并对故障电流重新滤波,最后采用原子分解算法精确辨识行波主自然频率值并求得故障距离。EMTP联合MATLAB的仿真结果表明,该方法具有很高的测距精度和可靠性,基本不受过渡电阻、故障类型及故障距离的影响。An algorithm based on the atomic decomposition and the natural frequency of traveling wave is proposed for single-terminal fault location. In the first turn,the fault current is processed by a FIR filter to obtain its main natural frequency component and an approximate value of its main natural frequency is identified by an atomic decomposition algorithm;in the second turn ,the parameters of that FIR filter are adjusted according to the approximate value of main natural frequency and its accurate value is obtained by the identification of that atomic decomposition algorithm,which is then used to locate the fault. The results of simulation with EMTP and MATALB show that,immune to the transition resistance,fault type and fault distance,the proposed method has higher fault locating accuracy and reliability.

关 键 词：输电线路 故障测距 自然频率 原子分解 FIR滤波 鲁棒性 

分 类 号：TM77[电气工程—电力系统及自动化]