基于Matlab的非平稳谐波检测方法仿真研究  

Matlab-based Simulation Study on Non-stationary Harmonic Detection Methods

作　　者：刘争艳[1] 郑恩让[1] 马令坤[1] 

机构地区：[1]陕西科技大学电气与信息工程学院,西安710021

出　　处：《化工自动化及仪表》2011年第1期69-71,共3页Control and Instruments in Chemical Industry

基　　金：温州市科学技术局项目(H20080001)

摘　　要：针对传统的傅里叶变换对于检测非平稳谐波存在的缺陷,分析了两种非平稳谐波检测方法:短时傅里叶变换和小波变换。首先介绍了短时傅里叶变换和小波变换谐波检测方法的基本原理,然后通过Matlab使用上述两种方法对非平稳谐波模型进行了仿真。理论分析和仿真结果表明,两种方法均可以达到检测非平稳谐波的目的,但又各有优缺点。Aiming at the defects of traditional FFT detecting non-stationary harmonic,two non-stationary harmonic detection methods of short time Fourier transform and wavelet transform were analyzed and their basic principle were introduced,together with their simulation on non-stationary harmonic model through Matlab.The results show that both methods can achieve the purpose of detecting non-stationary harmonics though advantages and disadvantages existing.

关 键 词：傅里叶变换 非平稳谐波检测 短时傅里叶变换 小波变换 

分 类 号：TM744[电气工程—电力系统及自动化]