电力系统及其自动化学报2019，Vol.31Issue(2)：32-37,6.DOI:10.3969/j.issn.1003-8930.2019.02.006
迭代加窗插值FFT谐波分析方法
Harmonic Analysis Approach Based on Iterative Windowed Interpolation FFT
摘要
Abstract
To improve the accuracy of harmonic analysis,a harmonic analysis approach based on iterative windowed in?terpolation fast Fourier transform(FFT)is proposed in this paper. Meanwhile,the uniform formulas for harmonic fre?quency,amplitude,and phase are deduced. Through mainlobe fitting,the traditional interpolation FFT approach based on maximum sidelobe decay window(MSDW)is extended to other symmetrical windows,and appropriate windows are selected to fit according to the mainlobe features of interpolated windows. Finally,an iterative algorithm is performed to calculate the accurate value of harmonic frequency. Simulation results show that the proposed approach can realize har?monic and inter-harmonic analyses accurately under the condition of asynchronous sampling. Compared with the tradi?tional windowed interpolation FFT algorithm,the proposed approach is independent of the types of window function, and it has uniform formulas that can calculate harmonic parameters for different window functions,indicating its univer?sality and feasible realization.关键词
谐波分析/插值/窗函数/迭代算法/快速傅里叶变换(FFT)Key words
harmonic analysis/interpolation/window function/iterative algorithm/fast Fourier transform(FFT)分类
信息技术与安全科学引用本文复制引用
李心一,谢志江,罗久飞..迭代加窗插值FFT谐波分析方法[J].电力系统及其自动化学报,2019,31(2):32-37,6.基金项目
国家自然科学基金青年基金资助项目(51607011) （51607011）
国网科技资助项目(5216D114000A) （5216D114000A）
湖南省教育厅优秀青年资助项目(17B006) （17B006）
