基于改进形态Haar小波在输电线路故障测距中的应用研究  

Research and application of improved morphological Haar wavelet in transmission line fault location

作　　者：成乐祥[1] 李扬[1] 唐瑜[2] 

机构地区：[1]东南大学电气工程学院,江苏南京210096 [2]浙江省电力设计院,浙江杭州310012

出　　处：《电力系统保护与控制》2010年第6期30-34,共5页Power System Protection and Control

摘　　要：提出将改进形态Haar小波(IMHW)用于输电线路行波测距中。从信号的时域上提取奇异点,能够较为快速和准确地定位奇异发生的时刻,适合应用于输电线路故障测距。大量ATP仿真结果表明采用基于IMHW变换的行波测距能够准确地提取行波信号的波头位置,具有较高的测距精度。IMHW变换主要是加减和取极值运算,与经典Mallat小波算法相比,该算法具有结构简单,算法量较小,易于工程实现的特点。Improved morphological Haar wavelet（IMHW） is proposed to locate transmission line fault by traveling wave.It extracts singular points from the time domain,which can position singular moment more quickly and accurately,and is fit for transmission line fault location.A lot of ATP simulation results show that the proposed algorithm of fault location based on IMHW is exact to extract the arrival time of traveling wave.Compared with Mallat algorithm,IMHW transform is mainly composed of addition,subtraction and taking extreme computation with the characteristics of simple structure,a small amount of algorithm,and easy to implement.

关 键 词：形态小波 HAAR小波 数学形态学 故障测距 小波变换 

分 类 号：TM755[电气工程—电力系统及自动化]