Research into Harmonic State Estimation in Power System Based on PMU and SVD
Shiying Hou, Zhixiang Xu, Houyu Lv, Jiang Zejia, Wang Lingyi · 2006
The traditional least squares estimation and advanced methods usually make asynchronous measurement to the harmonic signals, then to solve a giant over-determined linear equations with real variables. But these methods have some defects of the low estimated accuracy, tremendous calculation quantity and expensive measure cost. The paper develops a harmonic state estimation method based on PMU (phasor measurement unit), and solves ill-conditioned system of linear equations with complex variables in a way of complex singular value decomposition (CSVD). The formulation shows that the proposed approach results in well solution of the problem due to the traditional harmonic state estimation.