Fixed switching frequency model predictive based controller for sensor-less five-level Packed U-cell (PUC5) single phase inverter

In this paper, a new control design is developed for the Packed U-Cells (PUC) inverter. A fixed-switching frequency Model Predictive-based (MPC) algorithm is introduced for the sensor-less five-level (PUC5) inverter to regulate the current injected to the utility when it operates in grid connection mode. The proposed method generates the candidate vector that minimizes the well-known Finite Set Model Predictive (FS-MPC) cost function. Besides, the sensor-less voltage control of PUC5 takes in action of stabilizing DC capacitor voltages with no need of additional regulator. Less complexity with no sensors, nor required iterations are obtained. Discrete system model has been introduced and developed. Simulation results on MATLAB/Simulink are provided to confirm the effectiveness and robustness of the proposed algorithm.