Inductive drop compensation in one cycle controlled AC-DC active rectifiers

Classical control and one cycle control are popular methods to generate gating signals for active devices in Pulse Width Modulated rectifiers. One cycle control has lower control complexity when compared to classical control. However, in one cycle controlled converters there is a phase lag between fundamental voltage and current, which increases when the converter is loaded. In this paper, the reason for phase lag is elucidated and a novel method to compensate for the same is proposed. Effects of grid frequency variation in the degree of compensation is studied. The viability of the proposed compensation is validated using simulation and experimental studies.