| FFT分析电力系统谐波的加窗插值算法 |
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| 引用本文： | 李红伟,李在玉. FFT分析电力系统谐波的加窗插值算法[J]. 电气应用, 2004, 0(10): 61-64 |
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| 作者姓名： | 李红伟 李在玉 |
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| 作者单位： | 西南交通大学电气工程学院,610031;重庆三峡学院电子工程系,404000 |
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| 摘 要： | 采用快速傅里叶变换 (FFT)进行电力系统谐波分析时很难做到同步采样 ,故造成频谱泄漏 ,影响谐波分析的结果。本文对FFT的泄漏原因进行了分析 ,并用组合余弦窗对采样数据加权及利用插值对FFT的结果进行修正 ,精度得到极大的提高。文中给出了该算法进行谐波分析的算例 ,计算结果表明 ,基于Blackman Harris窗的算法具有更高的计算精度和效率。
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| 关 键 词： | 电力系统 谐波分析 FFT 窗函数 插值 |
| 修稿时间： | 2004-06-25 |
FFT Alogorithm Based on Cosin-window and Interpolation for Harmonic Analysis in Power System |
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| Li Hongwei. FFT Alogorithm Based on Cosin-window and Interpolation for Harmonic Analysis in Power System[J]. Electrotechnical Application, 2004, 0(10): 61-64 |
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| Authors: | Li Hongwei |
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| Affiliation: | Southwest Jiaotong University |
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| Abstract: | There are difficulties in harmonic analysis of power system with sysnchronized sampling using FFT alogorithm But if this condition is not satisfied,the results will be disturbed by the frequency leakage This paper analyses the reasons of leakage of FFT alogorithm, with using the poly-consin window for the sampling data window and using interpolation to amend the FFT results,the accuracy is improved obviously The simulating results shows that the alogorithm has higer efficency and Blckman Harris window has the higher accuracy |
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| Keywords: | power system harmonic analysis FFT window function interpolation |
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