p-q Theory Based Predictive Control for Voltage Regulation and Harmonic Compensation of Standalone SEIG

This paper deals with a predictive power control strategy using the Instantaneous Power Theory (p-q theory) for shunt compensation of an distributed off-grid generation system based on a self-excited induction generator (SEIG), ensuring power quality through voltage regulation and harmonic compensation. Furthermore, the controller reference signals are calculated from active and reactive power obtained by the p-q theory, in order to perform an optimized control. The inverter employed is a three-leg voltage source inverter (VSI), which is a well known simple solution for this application. Since the inverter has a finite switching possibilities, a discontinuous control is chosen to predict the next switching state that minimizes the cost function, for that, a FS-MPC strategy is defined. Simulation results are presented in this paper in order to validate the proposed compensation control system based on p-q theory.