The power signal’s synchronization phase extraction based on the Kalman filtering and Weighted Least Mean Squares filtering algorithm is proposed in this paper. The single-phase and three-phase voltage signal containing noise is modeled. Second, the principle of Kalman filter and WLSE filter is detail explained and the implementation steps are also presented. The synchronization approach based on Kalman filtering algorithm is able to suppress noise and disturbances. The synchronization approach based on WLSE filter algorithm precisely gets not only the positive and negtive DC components of three-phase unbalanced signal, but also the synchronization phase. Intensive simulation results verify that the prposed method can provide accurate instantaneous synchronization phase information under disturbances with a high dynamic speed. Compared with the tradtional synchronization methods, the proposed one has a better performace.
