基于小波变换的超高压输电线路故障选相新原理  

A new theory for fault phase determination of EHV transmission lines based on wavelet transformation

作　　者：胡巨[1] 杨明玉[1] 陈茂英[1] 

机构地区：[1]华北电力大学电力工程系,河北保定071003

出　　处：《广东电力》2005年第1期1-4,共4页Guangdong Electric Power

摘　　要：介绍了连续小波变换定义、基于多分辨分析的Mallat 快速小波分解算法。根据超高压(EHV)输电线路故障暂态电流的特点, 提出了基于小波变换能量特征的故障选相新原理和算法。借助 MATLAB/SIMULINK仿真分析软件, 研究了一实际电网EHV输电线路在区内不同故障条件下选相原理的有效性。结果表明, 该方案是可行的。The definition of continuous wavelet transformation and Mallat fast wavelet decomposition algorithm based on multiresolution analysis are described in this paper.According to the characteristics of fault transient current of extra-high voltage(EHV)transmission lines,a new theory for fault phase determination based on the features of wavelet transformation energy is presented.By the aid of MATLAB/SIMULINK simulation and analysis software,the validity of the theory applying to a real EHV system under different fault conditions is researched,and the result shows the feasibility of the theory.

关 键 词：超高压输电线路 故障选相 小波变换 暂态电流 

分 类 号：TM771[电气工程—电力系统及自动化]