Power Factor Correction of Parallel-Connected Boost Converter Utilizing a Fuzzy Logic-Based Controller

Nowadays, power grids typically utilize boost converters to transform energy into the desired form since they operate in continuous conduction mode (CCM) and have slight electromagnetic interference (EMI). Increasing nonlinear loads in modern power grids, which may result in poor power factor, makes applying an ordinary boost converter with solid performance extremely challenging. On the other hand, that traditional controllers, such as PIs, cannot control the converters at all operation points. In order to achieve the desired behavior of controlled output voltage, the fuzzy logic technique plays a crucial role in controlling the nonlinearity present in the designed system. For this purpose, a fuzzy logic-based controller scheme has been designed using the MATLAB/Simulink platform to maintain a constant output voltage at the load despite changes in the load. According to the results, fuzzy logic-based controllers have been more successful than classical controllers in providing the output constant voltage at the load by falling output voltage overshoots and ripple while the system power factor reached the unity value. Additionally, by comparing the proposed method to other traditional controllers, such as PI controllers, the robustness of the controller can be validated irrespective of changes in the system parameters.