Abstract
Recently finite control set model predictive control (FCS-MPC) becomes a promising solution for controlling power electronics devices (PEDs). Although FCS-MPC produces variable switching frequency and steady-state error, it has many advantages such as the ease of implementation, controlling multiple parameters at the same time, and generating the switching signals internally. This paper aims to assess the performance of the FCS-MPC by constructing a comparative study of the FCS-MPC current control with the proportional-integral (PI) current control. For a fair comparison, the FCS-MPC average switching frequency was made to be equal or lower than the PI switching frequency. The study was performed on three different grid-connected PEDs, which are the three-phase two-level, single-phase full-bridge, and H5 inverters. Both control strategies were compared considering the switching frequency, common-mode voltage, leakage current, total harmonics distortion, and steady-state error. The results illustrate that the produced common-mode voltage and leakage current of the FCS-MPC are lower than PI in all cases. Even though FCS-MPC results in higher THD and steady-state error, they were maintained within acceptable limits. The three inverters and case studies were carried out to verify the performance of the controllers via the PSCAD/EMTDA software package.