| 一类半波对称FFT改进算法与电网谐波分析 |
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| 引用本文： | 汤天浩,郑慧. 一类半波对称FFT改进算法与电网谐波分析[J]. 电源学报, 2011, 9(2): 80-85 |
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| 作者姓名： | 汤天浩 郑慧 |
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| 作者单位： | 上海海事大学电力传动与控制研究所,上海海事大学电力传动与控制研究所 |
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| 基金项目： | 上海市教委科研创新项重点项目(09ZZ162)；上海市教委重点学科(J50602) |
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| 摘 要： | 在深入分析快速傅里叶变换(FFT)方法的基础上,针对一类电网信号具有半波对称性的特点,提出了一种改进的FFT算法.该算法对于只含奇次谐波分量的一类半波对称波形,省去了偶次谐波分量的计算.因此,改进算法的计算量是传统FFT的一半,大大节省了运算时间,提高了谐波分析速度.论文详细推导了算法公式,设计了完整的计算流程,并通过...
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| 关 键 词： | 傅里叶变换 FFT算法 谐波分析 Matlab仿真 电网谐波试验 |
| 收稿时间： | 2010-10-09 |
| 修稿时间： | 2010-10-19 |
An Improved Half-wave Symmetric FFT Algorithm for Grid Harmonics Analysis |
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| TANG Tian-hao and ZHENG Hui. An Improved Half-wave Symmetric FFT Algorithm for Grid Harmonics Analysis[J]. Journal of Power Supply, 2011, 9(2): 80-85 |
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| Authors: | TANG Tian-hao and ZHENG Hui |
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| Affiliation: | Institute of Electric Drives and Control Systems, Shanghai Maritime University and Institute of Electric Drives and Control Systems, Shanghai Maritime University |
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| Abstract: | A improved FFT algorithm considering the half-wave symmetric characteristic of power system signals is presented based on the fast Fourier transform (FFT) method. The half-wave symmetric FFT algorithm could omit the even harmonics in its calculation for the half-wave symmetric signals with only odd harmonics. So the computation of the improved FFT just has a half amount of the traditional FFT. It could save a lot of calculation time. The algorithm formulation is deduced and the entire computation process is designed. Experiment results validated the feasibility. |
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| Keywords: | Fourier transform FFT algorithm harmonics analysis Matlab simulation grid harmonics test |
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