基于最小二乘法和复连续小波变换的电力系统间谐波测量方法  

A Method to Measure Inter-Harmonics in Power System Based on Least Square Method and Complex Continuous Wavelet Transform

作　　者：曹健[1] 林涛[1] 刘林[1] 张蔓[1] 崔一铂[1] 

机构地区：[1]武汉大学电气工程学院,湖北省武汉市430072

出　　处：《电网技术》2009年第17期86-90,共5页Power System Technology

基　　金：国家自然科学基金资助项目(50677044)~~

摘　　要：将最小二乘法和复连续小波变换相结合,提出了高精度稳态间谐波测量方法。该方法应用最小二乘法对整个测量频带进行函数拟合,得到了间谐波分量的个数,利用复连续小波变换的带通滤波特性精确测量了各个间谐波分量的频率和幅值。Matlab的仿真结果表明,该方法能够准确测量间谐波分量的频率和幅值,计算量较小。Based on least square method and complex continuous wavelet transform, a high-precision method to measure steady state inter-harmonics in power system is proposed, in which the function fitting of whole measured frequency band is performed to obtain the numbers of inter-harmonic components, then by use of the band-pass filtering feature of complex continuous wavelet transform the frequency and amplitude of each inter-harmonic is precisely measured. Simulation results by Matlab show that using the proposed method the frequencies and amplitudes of inter-harmonics can be precisely measured and the calculation burden is light.

关 键 词：电力系统 间谐波 最小二乘法 复连续小波变换 

分 类 号：TM714[电气工程—电力系统及自动化]