继电保护中傅立叶与最小二乘算法的性能比较

Performance comparison of fourier algorithm to minimum square algorithm in protection

继电保护中的一些误动事故与电气参数计算的基本算法有关,在介绍傅立叶算法与最小二乘算法及其实现的基础上,分别针对信号中含有衰减直流分量,谐波分量,以及电网频率波动等情况,对比分析了傅立叶算法与最小二乘算法的优劣,以期引起对最小二乘算法的重视。

According to the formula of Fourier algorithm and minimum square algorithm,the impact of attenuated DC fraction on both algorithm was simulated by Fortran77 program.The measurement accuracy of fundamental fraction and noises fraction in both algorithm were simulated when the input signal including noises.The influence of waving frequency of the grid on both algorithm was compared.The influence of sampling frequency on both algorithm was analyzed.