Abstract
For frequency tracking problem of non-stationary signals in power grid, we propose a unscented Kalman filter (UKF) and the weighted phase difference smoothing algorithm. It improved poor initial conditions sensitive situations of robustness UKF. In order to improve the accuracy of the algorithm, real-time and noise immunity, a suboptimal multiple fading factor and weighted smoothing method is added to improve UKF for frequency tracking of power signals. At last, The simulation results are given. It shows that this method has better accurate, real-time tracking of various frequency power signal and its performance is superior to similar documents tracking algorithm.
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