一种基于加窗的插值FFT重构Hilbert变换方法  

A Transforming Method of Hilbert Based on the Windowed Interpolation FFT Reconstruction

作　　者：曹锋[1] 高华[1] 

机构地区：[1]重庆交通大学,重庆400074

出　　处：《重庆理工大学学报（自然科学）》2012年第2期97-100,共4页Journal of Chongqing University of Technology：Natural Science

基　　金：重庆市科技攻关项目(CSTC2011AC6102)

摘　　要：提出了一种基于加窗的插值FFT算法重构Hilbert变换来测量无功功率的方法。该方法通过离散傅里叶变换及逆变换,能够准确地将各次谐波的电压进行90°移相,并利用加海明窗的插值FFT算法对各次谐波的频率、相位,以及幅值进行计算,克服频谱泄露所带来的影响,消除测量时产生的误差。仿真结果表明该方法具有很高的测量精度。This paper presents a windowed interpolation FFT-based reconstruction algorithm for the Hilhert transform to measure the reactive power. The method, by inverse and discrete Fourier, can accurately shift all the harmonics by 90 °. And by using the FFT algorithm of Jia Haiming window, it can calculate each harmonic frequency, phase, and amplitude calculation. It overcomes the impact of spectral leakage and eliminates its measurement error. Simulation results show that the method has high measurement accuracy.

关 键 词：无功功率 谐波 插值FFT算法 频谱泄露 

分 类 号：TP216.1[自动化与计算机技术—检测技术与自动化装置]