基于互高阶谱的ESPRIT法的间/次谐波参数估计  

Inter-harmonics and Sub-harmonics Parameter Evaluation on Cross-high-spectrum Based on Esprit Method

作　　者：田伟[1] 王韵然[2] 曲晶 

机构地区：[1]东北电力大学电气工程学院,吉林吉林132012 [2]北京交通大学,北京100044 [3]吉林机械工业学校,吉林吉林132012

出　　处：《东北电力大学学报》2007年第2期68-72,共5页Journal of Northeast Electric Power University

摘　　要：电力系统中,准确有效地确定信号中的间/次谐波分量,对于改善电能质量有重要意义。提出了基于互高阶累积量的子空间旋转法(Esprit)来估计间/次谐波幅值和频率。最大优点是无需谱峰搜索,计算量很小。In electric power system,the harmonics of integer times to fundamental component,the inter-harmonics,and sub-harmonics exist and are in special status. In this paper,cross high order accumulation is able to depress non-correlative noise and correlative gauss noises. ESPRIT method based on cross-high-order cumulate is provided. Simulation results show that this method is effective and accurate to evaluate sinusoid signal frequencies from hybrid colored noises and good performance.

关 键 词：子空间旋转法 互高阶谱 谐波 噪声 特征向量 

分 类 号：TM711[电气工程—电力系统及自动化]