摘要
快速傅立叶变换是应用最广泛的一种谐波检测方法,但直接利用快速傅立叶变换进行谐波检测存在较大的误差,影响谐波分析结果的准确性。通过加窗以及插值修正算法可以改善计算谐波频率、相位和幅值的准确度。简述了电网谐波检测非同步采样加窗插值算法的原理,根据电力谐波信号特点选择了合适的窗函数及其插值修正公式。MATLAB仿真结果表明,快速傅立叶变换加窗插值算法具有检测精度高、实现简单、功能多的优点,同时也验证了该改进算法的有效性和易实现性。
FFT（Fast Fourier Transform）is a method that applies most extensively of the harmonic measurements. However, if FFT is used directly to harmonic measurement there will be a larger error that affects the accuracy of harmonic analysis. Some efforts have been made to correct the accuracy of frequency, phase and amplitude measured by FFT, including the utilization of window functions and interpolation algorithms, the principle of power grid harmonic detecting non-synchronous sampling window interpolation algorithm was described, based on window function and interpolation algorithms. The results of MATLAB simulation show that the FFT window interpolation algorithm has advantage of high accurate inspection, easy implementation, and various functions; at the same time, also verified the effectiveness and easy implementation of improved algorithm.
出处
《电瓷避雷器》
CAS
北大核心
2009年第3期39-42,共4页
Insulators and Surge Arresters
关键词
快速傅立叶变换
谐波检测
窗函数
插值
fast fourier transform
harmonic analysis
window functions
interpolation
