Dual voltage controller based Power Factor Correction circuit for faster dynamics and zero steady state error

This paper analyzes dual voltage controllers for single-phase Power Factor Correction(PFC) Circuits using boost topology. The proposed scheme uses dual voltage controllers, one of the voltage controller having low bandwidth operates only during steady condition, other voltage controller with high bandwidth operates during the transient condition. At any given instant only one voltage controller is in circuit. Lower bandwidth controller, operating during steady state condition, maintains the THD within the required limits and the dc-bus voltage at its reference value. High bandwidth controller improves the transient performance by having faster response to the disturbance. Faster response to disturbances necessitates less energy storage in the dc-bus capacitor, hence a smaller capacitance value is required which resulting in a compact and a light-weight circuit. The comparative study between the proposed scheme and the conventional PFC circuit is carried out. The experimental results for the proposed scheme are also presented.