Accurate Dynamic Phasor Estimation by Matrix Pencil and Taylor Weighted Least Squares Method
Accurate Dynamic Phasor Estimation by Matrix Pencil and Taylor Weighted Least Squares Method
复制标题
矩阵铅笔和泰勒加权最小二乘法精确动态相量估计
DOI：
10.1109/tim.2021.3066187
复制
发表时间：
2021-01-01
影响因子：
5.6
通讯作者：
Wen, He
中科院分区：
文献类型：
--
作者：
Song, Jian;Zhang, Junhao;Wen, He
带外干扰（OOBI）测试是IEEE/IEC 60255-118-1-2018和C37.118.1a-2014中M级相量测量单元（PMU）的基准测试。由于间谐波产生的频谱干扰，动态相量估计器难以在短观测时间内满足OOBI测试要求。为此，提出了一种基于矩阵束的泰勒加权最小二乘（TWLS）方法，用于OOBI污染信号的动态相量估计。该方法首先利用矩阵束算法对信号的基波频率和其他分量的频率进行粗略估计。例如，谐波、次谐波和间谐波）。然后，采用TWLS方法获得更准确的动态相量和频率的估计。在稳态和动态条件下，所提出的方法的有效性进行了验证仿真，遵循IEEE标准的要求。
Out-of-band interference (OOBI) test is a benchmark test for M-class phasor measurement units (PMUs) in IEEE/IEC 60255-118-1-2018 and C37.118.1a-2014. Because of the spectral interference produced by interharmonic, it is difficult for dynamic phasor estimators to satisfy the OOBI test requirements with a short observation time. To this end, this article proposed a Taylor weighted least squares (TWLS) method based on the matrix pencil for the dynamic phasor estimation of the OOBI contaminated signal. The proposed method first applies the matrix pencil algorithm to obtain rough estimations for the frequencies of the fundamental component and other components (i. e., harmonics, subharmonics, and interharmonics) within a few cycles. Then, the TWLS method was adopted to acquire more accurate estimations of the dynamic phasor and frequencies. The effectiveness of the proposed method is validated by simulations under steady and dynamic conditions that follow the requirements of the IEEE standard.