电测与仪表2017，Vol.54Issue(10)：87-93,7.
基于汉宁双窗apFFT单谱线插值的电力谐波和间谐波检测算法
An electric power harmonic and inter-harmonic detection method based on single-spectrum-line interpolation of double Hanning windows apFFT
许鸿飞 1张姣姣 1庞思睿 1李雪梅 1金燊 1寇晓溪1
作者信息
- 1. 国网冀北电力有限公司信息通信分公司,北京 100053
- 折叠
摘要
Abstract
When FFT is applied to analyze the harmonic or inter-harmonic signal of electric power,due to the non-integral multiple relationship between the real frequency and the frequency resolution,the spectral leakage will occur.As a result of that,the estimation accuracy of the harmonic or inter-harmonic parameters will degrade.To solve this problem,a discrete signal spectrum line interpolation correction method based on double Hanning windows apFFT is proposed in this paper.The principle of the algorithm is as follows: after the signal is processed by double Hanning windows apFFT,the modified values of each theory frequency point are deduced by the ratio of the side spectral line and main spectral line amplitudes.Then,according to these frequencies modified values and Hanning window mode function,and the LTI of apFFT to correct the corresponding amplitudes.Because the phase spectrum of apFFT has nothing to do with the frequency deviation,the initial phase of each frequency point is the phase of the main spectral line.Simulation examples show that the harmonic and inter-harmonic parameters estimated by the single-spectrum-line interpolation based on double Hanning windows apFFT are more accurate,the total errors are smaller,and the algorithm is more robust against white noise.关键词
全相位FFT/频谱泄漏/单谱线插值/频谱校正/谐波和间谐波检测Key words
apFFT/spectral leakage/single-spectrum-line interpolation/spectral correction/harmonic and inter-harmonic detection分类
信息技术与安全科学引用本文复制引用
许鸿飞,张姣姣,庞思睿,李雪梅,金燊,寇晓溪..基于汉宁双窗apFFT单谱线插值的电力谐波和间谐波检测算法[J].电测与仪表,2017,54(10):87-93,7.
