A Predictive Control Strategy for Power Factor Correction

Harmonic pollution and low power factor in power systems caused by power converters have been a great concern. To overcome these problems several converter topologies and control schemes have been proposed in recent years. This paper is proposed to study the control techniques for such converters to improve the Power Factor (PF) and reduce total harmonic distortion (THD) in the input current with output voltage regulation. A new predictive control strategy for boost PFC is presented in this paper. Its basic idea is that all of the duty cycles required to achieve unity power factor in a half line period are generated by using predictive control. The duty cycle is determined based on the input voltage, reference output voltage, inductor current, and reference current. The proposed PFC control is derived based on Boost converter operates at continuous conduction mode and the switching frequency is much higher than the line frequency so that input voltage can be assumed as a constant during one switching cycle.