最小二乘算法的测量误差分析  

Analysis of measurement error of least squares algorithm

作　　者：刘和平[1] 徐育军 张学涛 

机构地区：[1]重庆大学电气工程学院,重庆400044 [2]许继电气公司,河南许昌461000

出　　处：《继电器》2006年第2期6-9,15,共5页Relay

摘　　要：在微机保护中可以利用最小二乘算法来计算故障电流的基波和谐波分量。对此算法中系数矩阵对测量误差的影响进行了分析,并与全波傅氏算法的系数对测量误差的影响进行对比,对实现短数据窗的最小二乘算法的难点进行了探讨,得出了结论。Least squares algorithm is carried out in microcomputer-based protection to calculate the current value of fundamental wave and harmonics. This paper analyses the impact of the coefficient matrix in the algorithm on the measurement error and compares the result with the impact of the coefficient in full-wave Fourier algorithm. The difficulties of realizing short data window least squares algorithm are discussed and conclusions are reached as well.

关 键 词：微机保护 最小二乘算法 全波傅氏算法 

分 类 号：TM930.115[电气工程—电力电子与电力传动]