Real-Time Implementation of an Optimized Model Predictive Control for a 9-Level CSC Inverter in Grid-Connected Mode

Alamera Nouran Alquennah, Mohamed Trabelsi, Khaled Rayane, Hani Vahedi and Haitham Abu-Rub
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Alamera Nouran Alquennah: Electronic and Communications Engineering Department, Kuwait College of Science and Technology, Kuwait City 27235, Kuwait
Mohamed Trabelsi: Electronic and Communications Engineering Department, Kuwait College of Science and Technology, Kuwait City 27235, Kuwait
Khaled Rayane: Department of Electrical and Computer Engineering, Texas A and M University at Qatar, Qatar Foundation, Doha 23874, Qatar
Hani Vahedi: Ossiaco Inc., Montreal, QC H3C 2G9, Canada
Haitham Abu-Rub: Department of Electrical and Computer Engineering, Texas A and M University at Qatar, Qatar Foundation, Doha 23874, Qatar

Sustainability, 2021, vol. 13, issue 15, 1-15

Abstract: The Crossover Switches Cell (CSC) is a recent Single DC-Source Multilevel Inverter (SDCS-MLI) topology with boosting abilities. In grid-connected PV applications, the CSC should be controlled to inject a sinusoidal current to the grid with low THD% and unity power factor, while balancing the capacitor voltage around its reference. These two objectives can be met through the application of a finite control set model predictive control (FCS-MPC) method. Thus, this paper proposes a design of an optimized FCS-MPC for a 9-level grid-tied CSC inverter. The switching actions are optimized using the redundant switching states. The design is verified through simulations and real-time implementation. The presented results show that the THD% of the grid current is 1.73%, and the capacitor voltage is maintained around its reference with less than 0.5 V mean error. To test the reliability of the control design, different scenarios were applied, including variations in the control reference values as well as the AC grid voltage. The presented results prove the good performance of the designed controller in tracking the reference values and minimizing the steady-state errors.

Keywords: crossover switches cell; CSC; multilevel inverter; Packed-U-Cell; model predictive control; grid connection (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
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