| 电力有源滤波器中对指定整数次谐波检测的DFT算法 |
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| 引用本文： | 刘传林,刘开培. 电力有源滤波器中对指定整数次谐波检测的DFT算法[J]. 电测与仪表, 2005, 42(1): 4-7,13 |
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| 作者姓名： | 刘传林 刘开培 |
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| 作者单位： | 广东水利电力职业技术学院,电力系,广州,510635;武汉大学,电气工程学院,武汉,430072 |
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| 摘 要： | 根据带通滤波器的瞬时谐波检测方法，离散傅里叶变换基本思想，提出了运用基于DFT的滤波算法实现带通滤波。该算法可从原电流分离出指定次数谐波的分量，通过PWM对原电流进行反相补偿，以滤除指定谐波分量。基于理论上更有效地提高了谐波检测的准确度和检测实时性，在对指定次数谐波进行实时补偿方面具有一定的优势。理论研究和仿真表明．根据该DFT算法设计的数字系统可实现对指定次数谐波的检测。
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| 关 键 词： | 谐波检测 离散傅里叶变换 DFT滤波算法 仿真实验 |
| 文章编号： | 1001-1390(2005)01-0004-04 |
A DFT Algorithm for Specific Integer Times Harmonics Detection in Active Power Filter |
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| LIU Chuan-lin,LIU Kai-pei. A DFT Algorithm for Specific Integer Times Harmonics Detection in Active Power Filter[J]. Electrical Measurement & Instrumentation, 2005, 42(1): 4-7,13 |
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| Authors: | LIU Chuan-lin LIU Kai-pei |
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| Affiliation: | LIU Chuan-lin1,LIU Kai-pei2 |
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| Abstract: | According to the Discrete Fourier Transform, this paper proposes a method of harmonic detection by band filter based on DFT algorithm, which improves the dynamic performance of detection system. The harmonic component can be separated from the original current with specific times by this algorithm, and then can be compensated with PWM. It increases the accuracy of the harmonic detection and its real time performance in the theory, has the advantage for the real time compensation of the specific times harmonics. The research of theories and simulation show that this digital system based on this DFT algorithm can be used to detect the specific times harmonics. |
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| Keywords: | harmonic detection Discrete Fourier Transform filtering algorithm simulation experiment |
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