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.
出处
《广东电力》
2005年第1期1-4,共4页
Guangdong Electric Power
关键词
超高压输电线路
故障选相
小波变换
暂态电流
EHV transmission line
fault phase determination
wavelet transformation
transient current
