Predictive Model Control of a Three-Phase Converter

This work introduces a detailed framework for a three-phase multilevel converter that incorporates model predictive control (MPC) to improve power conversion efficiency. The developed MPC approach utilizes a comprehensive cost function designed to achieve multiple objectives: accurate current control, reduction of circulating currents, and maintaining balanced capacitor voltages—all without requiring traditional modulation components. Testing performed using MATLAB/Simulink validates the system's capabilities, confirming the production of six distinct voltage levels, proper capacitor voltage regulation within design specifications. The control methodology demonstrates reliable operation during varying operating conditions, particularly when subjected to abrupt DC voltage changes that replicate practical scenarios like fluctuating solar panel output conditions.