一种新型的基于单周控制的功率因数校正方法及实验研究

A New PFC Method and Experimental Study Based on One-Cycle Control

单周控制理论因其控制电路简单且不需要复杂的数学计算等优点目前已被广泛用于FACTS控制。本文提出一种基于单周控制的高性能功率因数校正(PFC)方法,用于对单相整流类负载进行功率因数校正和谐波治理有很大的技术优势。文章分析了基于单周控制的高性能PFC方法的电路拓扑和基本原理,推导了相应的单周控制方程,给出了主电路的主要参数(电感、直流侧储能电容)的设计和选取标准,建立了单周控制高性能PFC电路的大信号模型,并在此基础上进行了控制系统PI调节器设计,将控制系统校正为典型II型系统,消除了稳态误差,提高了抗扰性能,为系统的综合设计提供了理论依据。样机试验结果证明了理论分析和设计的正确性。

One-cycle control （OCC） theory is widely used in the control of FACTS because of its simple circuit topology and avoiding complex computing process. A new high-performance PFC method based on OCC is adopted in this paper, which has great technical advantages in input power factor correction and harmonic suppression for single-phase rectifier load. The circuit topology and basic principle of this method are first analyzed, and the corresponding OCC control equation is derived out, then the estimated formulas and design to determine the main circuit parameters, such as inductance, DC-link capacitance, are given in this paper. The large signal model for the high-performance PFC circuit based on OCC is established based on energy balance, then the design for PI controller is accomplished, and 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.