A Novel High-performance Single-phase PFC Approach Based on One-cycle Control

Abstract

Currently one-cycle control (OCC) theory is widely used in the control of APF and other FACTS. In contrast to previously proposed methods, there is no need to generate a current reference for the control of the converter current, thus no need for a multiplier and no need to sense the AC line voltage, the APF current, or the nonlinear load current. Only one current sensor and one voltage sensor are used to sense the AC main current and the DC-link capacitor voltage. This paper puts forward a new high-performance PFC method based on OCC, which has great technical advantages in input power factor correction and harmonic suppression for rectifier load. The circuit topology and basic principle of the high-performance PFC approach with OCC are first analyzed, and the corresponding OCC control equation is derived, then the estimated formulas and design to determine the main circuit parameters, such as the inductor, the DC-link capacitor, are given in this paper. The large signal model for the high-performance PFC circuit with OCC is derived based on energy balance, then the design for PI controller about the control system is accomplished, the control system is corrected to be typical II which can eliminate the steady error and improve the anti-disturbing ability. All of the above analysis and design give the theory basis to comprehensively design the whole system. The theoretical analysis and design are verified by prototype experiments