Application of generalized peak current controllers for active power filters and rectifiers with power factor correction

Fast transient response, inherent current limiting, and simple implementation are some of the advantages of peak current controllers. Such features makes these controllers suitable for a variety of power converters such as inverters and dc-dc converters. The switching frequency of peak current controllers, however, is not constant and is susceptible to the operating point and system parameters. Recently, a generalized peak current controller (GPCC) is proposed that addresses the variable switching frequency of conventional peak current controllers. The GPCC formulation is derived such that it can be applied to various inverter topologies. In its original format, the GPCC can only regulate sinusoidal currents in inverter applications. In this paper, a simple yet effective extension of the GPCC is proposed to cover two more applications: (i) inverters as active power filters and (ii) boost rectifiers with power factor correction. The proposed extended methods still maintain the simplicity and fixed switching frequency of the GPCC. After reviewing the concept of the original GPCC, the proposed controllers are elaborated and simulations and experimental results are provided to verify their performance.