计算机应用与软件Issue(10)：123-126,4.DOI:10.3969/j.issn.1000-386x.2015.10.028
基于加新型自卷积窗的频谱插值谐波分析方法
HARMONIC ANALYSIS METHOD BASED ON SPECTRUM INTERPOLATION ADDING NEW SELF-CONVOLUTION WINDOW
吕振 1李晶 1张凤龙 2柳传强2
作者信息
- 1. 辽宁工程技术大学电气与控制工程学院 辽宁 葫芦岛 125105
- 2. 东方电子股份有限公司技术中心 山东 烟台 264000
- 折叠
摘要
Abstract
In power system harmonic analysis method,fast Fourier transform (FFT)has the problems of barrier effect and spectral leakage caused by the difference in sampling and the interception of non-integer cycle.To tackle them,we proposed in this paper a power system harmonious analysis method which is based on FFT spectrum interpolation improved by P order triangle self-convolution window.The first step is to use P order self-convolution window to intercept signals,after that three spectrum lines of discrete spectra close to the frequency with largest amplitude are selected for weighted average calculation to determine precise positions of the harmonic spectra,and then the amplitudes,phases and frequencies of the harmonics can be got.Finally,by using the method of polynomial fitting,we proposed harmonic correction formula.Simulation results show that the proposed self-convolution window function can reduce the influence brought about by spectrum leakage and barrier effect.To use the improved spectrum interpolation algorithm can raise the precision of electric power harmonic detection and contribute to the applied analysis of harmonic.关键词
谐波/快速傅里叶变换/三角自卷积窗/频谱泄露/栅栏效应Key words
Harmonic/Fast Fourier transform/Triangle self-convolution window/Spectrum leakage/Barrier effect分类
信息技术与安全科学引用本文复制引用
吕振,李晶,张凤龙,柳传强..基于加新型自卷积窗的频谱插值谐波分析方法[J].计算机应用与软件,2015,(10):123-126,4.
