基于矩阵束算法的电力系统非整数次谐波检测方法  

A Detection Method for Non-integer Harmonics Measurement Based on Matrix Pencil Algorithm

作　　者：李伟超[1] 林国[1] 尹星[2] 

机构地区：[1]郑州航空工业管理学院计算中心,郑州450015 [2]三峡大学,湖北宜昌443002

出　　处：《电测与仪表》2012年第4期24-26,共3页Electrical Measurement & Instrumentation

摘　　要：针对傅里叶变换检测非整数次谐波有频谱泄露,检测精度不高等缺点,将一种子空间算法———矩阵束算法应用到非整数次谐波的检测领域,得到了较为理想的检测效果。通过MATLAB的m文件实现了矩阵束算法和傅里叶变换算法,然后分别从噪声和采样点数少对检测结果的影响两方面,对两种算法的检测精度进行了分析比较,结果表明矩阵束算法在非整数次谐波检测方面性能优越。As Fourier transformation of non-integer harmonics detection exists the shortcomings,such as spectral leakage,low detection accuracy.A sub-space algorithm —Matrix Pencil algorithm is applied to the field.A more satisfied result can be reached.The matrix pencil algorithm and Fourier transform algorithm are implemented through the MATLAB m-file.Then the paper compared the detection accuracy of the two algorithms under the situation of gaussian white noise and when the sampling data is few.The results show that the matrix pencil algorithm has a more superior performance for non-integer harmonics detection.

关 键 词：非整数次谐波 傅里叶变换 子空间算法 矩阵束 

分 类 号：TM933[电气工程—电力电子与电力传动]