基于SVD-MMVDR和Prony算法的间谐波参数估计  

Inter-Harmonic Parameter Estimation Based on Singular Value Decomposition Modified Minimum Variance Distortion Response and Prony Algorithm

作　　者：朱天敬 王晨曦[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003

出　　处：《电力科学与工程》2013年第11期5-10,共6页Electric Power Science and Engineering

摘　　要：提出了一种基于SVD-MMVDR算法与普罗尼(Prony)算法相结合的谐波间谐波参数估计方法。SVD-MMVDR算法具有频率分辨力高,所需数据少的特点,可以准确地计算出信号源中谐波及间谐波的个数和频率值,然后利用Prony算法中的总体最小二乘法估计出谐波间谐波的幅值和初相角。仿真以及电弧炉模拟系统试验证明,基于SVD-MMVDR算法与Prony算法的谐波间谐波参数估计方法切实可行,在存在噪声的情况下,该方法也能够准确地计算出谐波和间谐波的频率、幅值和相角。This paper proposed a new method for inter-harmonics parameter estimation, which was based on SVD-MMVDR and Prony algorithm. The performance of SVD-MMVDR was tested by the simulated inter-harmonics cur-rent signal and the results show that SVD-MMVDR was capable of identifying clearly the numbers and frequencies of the inter-harmonics even with less sampling data, then the amplitude and phase of the inter-harmonics was esti-mated by the least square method in Prony method and the results were really satisfactory. Simulation and the ex-periment results of the arc furnace system pave the way to estimate inter-harmonic parameter by SVD-MMVDR and Prony algorithm, and the proposed method can accurately estimate the frequency, amplitude and phase under noise conditions.

关 键 词：SVD—MMVDR算法 普罗尼算法 谐波 间谐波 频率分辨力 

分 类 号：TM744[电气工程—电力系统及自动化]