Power factor compensation and DC-link voltage regulation for a single-phase PWM multilevel rectifier

Active rectifiers are commonly used to address two issues in electric power delivery: DC voltage regulation and AC power factor improvement, through current tracking. In this study, the authors propose a non-linear controller that solves the DC voltage regulation and the AC current tracking for the single-phase active rectifier. The proposed controller is based on a partial input–output feedback linearisation and an adaptive indirect control of the zero dynamics. Numerical simulations are included to evaluate the performance of the proposed controller.