基于Haar小波变换的变压器绕组幅频响应曲线特征的分析  

Characteristic analysis of transformer winding amplitude frequency response curve based on Haar wavelet transform

作　　者：王艳春[1] 蔡振江[1] 张艳林[1] 

机构地区：[1]河北农业大学机电工程学院,河北保定071001

出　　处：《中国农机化学报》2014年第1期103-106,共4页Journal of Chinese Agricultural Mechanization

摘　　要：采用Haar小波变换来分析变压器幅频响应曲线的特征。传统的分析信号特征的方法一般采用傅立叶分析法,而小波分析相比傅立叶分析有着许多本质性的进步,在局部时频域分析中具有很强的灵活性。本文首先介绍了离散小波变换的基本概念,然后提出了基于Haar小波变换的分析曲线特征的方法,并用Matlab软件中小波变换的工具箱,对由电路仿真软件PSPICE仿真得出的变压器绕组幅频响应曲线进行Haar小波变换,提取Haar一层小波变换的高频小波系数,高频系数能够反映变压器绕组幅频响应曲线的细节信息,更能反映变压器绕组的变化。Haar wavelet transform is used to analyze the characteristic of transformer amplitude frequency response curve this paper, the tra- ditional method of analyzing the signal characteristic is generally the Fourier analysis, compared of Fourier, wavelet transform has many na- ture progress, has very strong flexibility in the analysis of local time and frequency domain. This paper firstly introduces the basic concept of discrete wavelet transform, and then puts forward the method to analyze the characteristic of curve based on Haar wavelet transform, and us- ing the software of MATLAB wavelet toolbox, to deal with the obtained data from the transformer winding amplitude frequency response curve through the simulation of PSPICE, based on Haar wavelet transform, extraction of high frequency wavelet coefficients of the first layer of Haar wavelet transform. The high frequency coefficients can reflect the detail information of the transformer winding amplitude frequency response curve, and reflect the change of transformer winding.

关 键 词：HAAR小波变换 高频小波系数 PSPICE MATLAB 变压器幅频响应曲线 

分 类 号：TM932[电气工程—电力电子与电力传动]