Predictive current control of three-phase three-wire APF with error feedback correction

In this paper, a three-phase three-leg shunt active power filter (SAPF) which is based on model predictive control(MPC) is presented. First, the mathematical model of three-leg SAPF is derived, and the predictive current control is adopted for the current loop in order to improve the tracking dynamic response of the compensation current, optimize the effect of compensating harmonic current and improve the adaptive ability of the SAPF. To ensure the reliability of APF system, traditional PI control is introduced into voltage loop to maintain the stability of DC voltage, minimize overshoot and static error. Finally, simulation results show that the proposed MPC method is correct and feasible.