| 一种基于谱线幅值归零的加窗插值FFT谐波检测方法 |
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| 引用本文： | 郑 植,张俊敏,田贇祥,卢 晶. 一种基于谱线幅值归零的加窗插值FFT谐波检测方法[J]. 核聚变与等离子体物理, 2021, 41(3): 215-220. DOI: 10.16568/j.0254-6086.202103004 |
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| 作者姓名： | 郑 植 张俊敏 田贇祥 卢 晶 |
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| 作者单位： | 中南民族大学,武汉 430074;中国科学院等离子体物理研究所,合肥 230031;中国科学技术大学,合肥 230026;中国科学院等离子体物理研究所,合肥 230031 |
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| 基金项目： | 中南民族大学 2020 年研究生学术创新基金(3212020sycxjj132) |
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| 摘 要： | 提出了一种基于谱线幅值归零的加窗插值FFT谐波检测方法用于分析复杂电网信号中的各次谐波.该检测方法将每一次在离散频谱中找到的最大谱线及其左右两侧的数根谱线幅值归零,直到各次谐波分析完毕.通过仿真实验分析了在基波频率稳定时对模拟信号的测量精度,研究了基波频率波动对谐波分析的影响.通过对EAST实验数据的分析,验证了该谐波...
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| 关 键 词： | 谱线幅值归零 加窗插值FFT 谐波检测 高精度 |
| 收稿时间： | 2019-12-30 |
A windowed interpolation FFT harmonic detection method based on zeroing spectral-line amplitudes |
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| ZHENG Zhi,ZHANG Jun-min,TIAN Yun-xiang,LU Jing. A windowed interpolation FFT harmonic detection method based on zeroing spectral-line amplitudes[J]. Nuclear Fusion and Plasma Physics, 2021, 41(3): 215-220. DOI: 10.16568/j.0254-6086.202103004 |
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| Authors: | ZHENG Zhi ZHANG Jun-min TIAN Yun-xiang LU Jing |
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| Affiliation: | (1. South-Center University for Nationalities, Wuhan 430074;2. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031; 3. University of Science and Technology of China, Hefei 230026); |
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| Abstract: | A harmonic analysis algorithm of windowed interpolation FFT based on zeroing spectral-line amplitudes is proposed to analyze the harmonics of complex power network signals. The complex power network signals are analyzed until the harmonic analysis is completed by zeroing the amplitudes of the maximum spectral line and the three spectral lines on its left and right sides found in the discrete spectrum. Measurement accuracy is studied when the fundamental frequency is stable and influence of fundamental frequency fluctuation on the measurement accuracy is analyzed with simulation. The analysis results of the EAST experimental data verify the feasibility and high accuracy of the method. |
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| Keywords: | Zeroing spectral-line amplitudes Windowed interpolation FFT algorithm Harmonic detection High accuracy |
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