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.
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
关键词
子空间旋转法
互高阶谱
谐波
噪声
特征向量
Cross-high-order-accumulation
Inter-harmonics and Sub-harmonics Colored
Hybrid
Noise Characteristic Decomposition Cross-high-order-spectrum
