Optimized DC-Bus Voltage Controller for PDPC of Shunt Active Power Filter Based Rooted Tree Optimization Algorithm

In this paper, an optimized algorithm named Rooted Tree Optimization (RTO) to tune an anti-windup Proportional Integral (PI) Direct-Current (DC)-bus voltage controller employed in Predictive Direct Power Control (PDPC) for three-phase Shunt Active Power Filter (SAPF) is presented and implemented. RTO algorithm is a simple optimization technique which inspired from the roots behavior of a tree searching for water at nearest place. RTO algorithm is used to obtain optimum gains of the anti-windup PI controller to improve the response performance of DC-bus voltage like settling time, overshoot and undershoot. In order to show the effectiveness of the proposed algorithm, a simulation with load variation test was carried out under Matlab. Simulation results are presented and compared to a classical PDPC to illustrate the better performance given by the proposed PDPC-RTO to control the SAPF.