一种基于修正采样序列的傅里叶测频算法

A Fourier Frequency Measurement Algorithm Based on Modified Sampling Sequence

针对电力系统中傅里叶测频算法的精度问题,本文提出的一种基于修正采样序列的傅里叶测频算法,通过对传统傅里叶算法的改进,消除了传统算法的理论误差,并利用修正采样序列和迭代的方法,使原始采样序列尽可能逼近理想序列,达到采样频率与系统基波频率趋于同步的目的,从而减小了频谱泄漏问题和栅栏效应。通过仿真分析,该算法有效提高了电力系统频率测量精度。

Aiming at the accuracy of the Fourier frequency measurement algorithm,a Fourier frequency measurement algorithm is proposed in this paper based on the modified sampling sequence.By improving the traditional Fourier algorithm,the formula error of the traditional algorithm is eliminated.By modifying the sampling sequence and iterative methods,the original sampling sequence is as close to the ideal sequence as possible,so that the sampling frequency and the fundamental frequency of the system tend to be synchronized,thereby reducing the problem of spectrum leakage and the fence effect.Through simulation analysis,the algorithm effectively improves the frequency measurement accuracy.