Kaiser窗的组合余弦窗拟合及其在频谱分析中的应用

彭曦; 刘开培; 李登云

彭曦,刘开培,李登云.Kaiser窗的组合余弦窗拟合及其在频谱分析中的应用[J].电测与仪表,2018,55(19):93-96.
Peng Xi,Liu Kaipei,Li Dengyun.A fitting Combined Cosine Window Based on Kaiser Window and Its Application in Harmonic Analysis[J].Electrical Measurement & Instrumentation,2018,55(19):93-96.

Kaiser窗的组合余弦窗拟合及其在频谱分析中的应用

A fitting Combined Cosine Window Based on Kaiser Window and Its Application in Harmonic Analysis

DOI：

中文关键词: 组合余弦窗最小二乘法 Kaiser窗双谱线插值谐波分析

英文关键词:Combined cosine window, least square, Kaiser Window, two-spectrum-line interpolation FFT, harmonic analysis

基金项目:

作者中文名	作者英文名	单位
彭曦	Peng Xi	武汉大学电气工程学院
刘开培	Liu Kaipei	武汉大学电气工程学院
李登云	Li Dengyun	中国电力科学研究院

摘要点击次数: 1547

中文摘要:

为了利用余弦窗双谱线插值谐波分析方法,本文针对非余弦Kaiser窗提出了一种基于最小二乘法的组合余弦窗拟合方法,将Kaiser窗拟合为组合余弦窗,拟合的组合余弦窗能保持原窗的性能。以β=11的Kaiser窗为例构造了组合余弦窗,结合余弦窗双谱线插值法进行了频谱分析,结果表明,基于拟合组合窗余弦窗的双谱线插值算法比Kaiser窗双谱线插值算法的谐波幅值精度更高。

英文摘要:

In order to use FFT interpolation algorithms based on various cosine window functions in harmonic analysis of power system, this paper proposes a fitting combined cosine window based on Kaiser window by using least squares. The fitting window function substantially maintains the original performance of Kaiser Window. Then, take the Kaiser window with β = 11 as an example. The frequency spectrum properties are analyzed by two-spectrum-line interpolation FFT. Finally, compare harmonic analysis based on Kaiser Window Interpolation FFT. The harmonic amplitude contrast results indicate that the harmonic analysis based on two-spectrum-line interpolation FFT with the fitting window is more accurate than the Kaiser Window interpolation FFT.

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