Three-phase four-wire shunt active power filter with the interconnection of single-phase and three-phase converters

This paper presents a topology based on the interconnection of single-phase H-bridge converters and a three-phase converter acting as a shunt active power filter for three-phase four-wire (3P4W) systems under balanced and unbalanced conditions. Model, PWM approach and control strategies are presented to the studied converter. As compared to the conventional solutions by using just H-bridges converters, the proposed one reduces the number of semiconductor and storage devices. A comprehensive THD analysis will be considered followed by simulated and experimental outcomes.