Abstract

Nowadays, there is increasing interest in modern control techniques, such as Model Predictive Control (MPC), to address the control of current, voltage, or power in grid-tied inverters used for renewable energy processing. This paper assesses key performance indicators of grid-tied three-phase inverters using two different Finite Control Set - Model Predictive Control (FCS-MPC) approaches. The first approach is based on the well-known classical FCS-MPC (CMPC), which is simpler but exhibits notable current ripples, variable switching frequency and high common-mode voltage. On the other hand, the modulated FCS-MPC (MMPC) approach adds additional steps to the MPC algorithm although produces negligible current ripple. Simulation results highlight the difference and similarities between the both approaches considering intrinsic parameters such as current ripple, current distortion, common-mode voltage as well as common usage scenarios such as voltage harmonics, voltage unbalance and grid faults. © 2025 IEEE.