This study focuses on the application of Finite Control Set Model Predictive Control (FCS-MPC) in the context of the VR-BESS converter (Voltage Regulator - Battery Energy Storage System), a three-port converter used for power management and voltage control in standalone systems with photovoltaic generation and batteries. Due to the scarcity of studies on the modeling and control of this converter, the main objective of this work is to propose a unified discrete model that represents all operation modes, as well as to evaluate the performance of FCS-MPC using current cost function for indirect voltage control. Simulation results indicate that the indirect voltage control achieves values close to the desired steady-state levels, with a maximum error of about 1% in the converter’s output voltage. This demonstrates the effectiveness of the proposed model and the control method used.
