Improved and accurate low‐frequency average modelling and control of a conventional power factor correction boost converter in continuous conduction mode

Abstract

When dealing with power factor correction (PFC) rectifiers that require the use of high filter capacitances, conventional small-signal modelling techniques are not capable of reproducing the converter behaviour accurately owing to the impact of the low-frequency dynamics on the system. In this context, this work presents an improved modelling technique applied to a conventional PFC boost converter operating in continuous conduction mode (CCM). The proposed approach leads to a more accurate analysis than the traditional modelling developed for dc-dc converters, which is often extended to rectifiers. It consists of a fast and concise solution for the implementation of several PFC techniques from the derived transfer functions. The introduced method is described aiming at the development of a boost-based PFC stage using the well-known one-cycle control technique (OCC). Simulation and experimental results are presented and thoroughly discussed to validate the theoretical assumptions. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Artificial Intelligence and Agent based Modeling for Power System Engineering

“…Nevertheless, because of its added inductor and capacitor, which result in significant power losses, its energy conversion effectiveness is less than that of other converter topologies, e.g., as the buck and boost converters. A re-structured SEPIC structure for a step-down or step-up converter was developed by de et al [15] as an enhancement over the conventional SEPIC structure in continuous conduction mode. Little losses in transmission of input power to the load are possible.…”