| 一种识别谐波分量主瓣干扰的方法 |
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| 引用本文： | 许仪勋,李宁,王玥.一种识别谐波分量主瓣干扰的方法[J].上海电力学院学报,2018,34(6):563-566. |
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| 作者姓名： | 许仪勋 李宁 王玥 |
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| 作者单位： | 上海电力学院 电气工程学院,上海电力学院 电气工程学院,上海电力学院 电气工程学院 |
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| 摘 要： | 加窗插值快速傅里叶变换是目前最常用的谐波信号分析方法。当信号中含有频率相近的谐波和间谐波分量时，频谱中通常存在主瓣干扰现象，影响到加窗插值快速傅里叶变换的精度。针对这一问题，研究了主瓣内谱线的相位特性，提出了一种判断主瓣干扰存在的方法，进而识别出频率相近的谐波和间谐波分量。仿真实验验证了该算法的有效性和准确性。
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| 关 键 词： | 加窗插值快速傅里叶变换 间谐波 主瓣干扰 |
| 收稿时间： | 2018/4/18 0:00:00 |
A Method of Identifying Main-lobe Jamming of Harmonic Components |
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| XU Yixun,LI Ning and WANG Yue.A Method of Identifying Main-lobe Jamming of Harmonic Components[J].Journal of Shanghai University of Electric Power,2018,34(6):563-566. |
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| Authors: | XU Yixun LI Ning and WANG Yue |
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| Affiliation: | School of Electrical Engineering, Shanghai University of Electric Power, Shanghai 200090, China,School of Electrical Engineering, Shanghai University of Electric Power, Shanghai 200090, China and School of Electrical Engineering, Shanghai University of Electric Power, Shanghai 200090, China |
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| Abstract: | Windowed interpolation fast Fourier transform (FFT) algorithms are currently the most commonly used method for harmonic analysis.When the signal contains harmonic/inter-harmonic components with closing frequencies,the main-lobe jamming usually exists in the frequency spectrum,which seriously affects the accuracy of windowed interpolation FFT.To solve this problem,the phase-frequency characteristics of main lobes are studied and a method for checking whether the main-lobe jamming exists is proposed,which can identify harmonic/inter-harmonic components with closing frequencies.Simulation experiments verify the effectiveness and accuracy of the proposed method. |
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| Keywords: | windowed interpolation fast Fourier transform inter-harmonic main-lobe jamming |
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