Modeling and Performance Evaluation of a Fuzzy Logic Controller for Buck-Boost DC/DC Converters

In the last years, Smart Grid applications and Renewable Energy Sources have grown strongly worldwide, particularly the photo-voltaic (PV) and wind energy conversion systems. However, PV cells and wind energy conversion requires to keep a constant DC voltage at a specific level during real-time variations of environmental conditions, such as temperature, radiation and wind speed. In view of this goal, a suitable control scheme topology is proposed in this study for power electronic converters. Conventional proportional-integral (PI) controller and Fuzzy Logic Control (FLC) for DC/DC converters are surveyed in the paper. Voltage control is demonstrated for the both cases. A comparison of simulation results indicates that the performance of the FLC is superior to that of a conventional PI controller.