电力谐波滑窗迭代DFT检测算法的研究与仿真  

Study and Simulation of Harmonic Detection Based on Sliding-window Iterative Algorithm of Discrete Fourier Transform

作　　者：陆秀令[1] 周腊吾[2] 张松华[1] 曹才开[1] 

机构地区：[1]湖南工学院,湖南衡阳421002 [2]湖南大学,湖南长沙410082

出　　处：《系统仿真学报》2008年第14期3652-3655,共4页Journal of System Simulation

基　　金：湖南省自然科学基金资助项目(03YJJ5005);湖南省教育厅科学研究资助项目(05C002)

摘　　要：有源电力滤波器的动态补偿要求能够准确、实时地检测出电网中瞬态变化的畸变电流。针对现阶段有源电力滤波器畸变电流检测方法存在工频周期时延、计算量大等不足,提出了一种基于离散傅立叶变换的滑窗迭代DFT(Discrete Fourier Transform,DFT)算法。该方法能有效地提高系统的实时性、目标跟随特性和抗干扰性,并且具有计算量小、容易工程实现的特点。利用MATLAB进行了滑窗迭代DFT仿真实验,实验结果表明该算法的有效性和正确性。The dynamic compensation of active power filter （APF） demands that variable current in electrical net should be detected exactly and Real-time. To avoid some shortages of current harmonic detection methods of APF, a sliding-window iterative DFT （Discrete Fourier Transform） algorithm was proposed for harmonic reference-current＇s real-time detection, which improved the real-time, tracing, and anti-interference performances with less computation and easy implementation. The algorithm was simulated with MATLAB, and the feasibility of its application was verified experimentally.

关 键 词：滑窗迭代 DFT 谐波检测 仿真 

分 类 号：TM771[电气工程—电力系统及自动化] TP391.9[自动化与计算机技术—计算机应用技术]