Feedforward current control of boost single-phase PFC converters

This paper presents the theory and application of feedforward current control for boost single-phase PFC converters. The proposed feedforward signal involves the instantaneous line voltage and the derivative of the reference current. The new control method is compared to existing feedback and feedforward control methods and showed to significantly reduce input current harmonic distortion. Implementation of the method using analog devices and the associated issues such as sensitivity to parameter variation and uncertainty are presented. Analysis results are complemented by numerical simulation and experimental results from a prototype converter.