A Novel Control Approach to Hybrid Multilevel Inverter for High-Power Applications

Muhammad Ali, Ghulam Hafeez, Ajmal Farooq, Zeeshan Shafiq, Faheem Ali, Muhammad Usman and Lucian Mihet-Popa
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Muhammad Ali: Department of Electrical Engineering, University of Engineering and Technology, Mardan 23200, Pakistan
Ghulam Hafeez: Department of Electrical Engineering, University of Engineering and Technology, Mardan 23200, Pakistan
Ajmal Farooq: Department of Electrical Engineering, University of Engineering and Technology, Mardan 23200, Pakistan
Zeeshan Shafiq: Center of Intelligent Systems and Networks Research, University of Engineering and Technology, Peshawar 25000, Pakistan
Faheem Ali: Department of Electrical Engineering, University of Engineering and Technology, Peshawar 25000, Pakistan
Muhammad Usman: Department of Computer Software Engineering, University of Engineering and Technology, Mardan 23200, Pakistan
Lucian Mihet-Popa: Faculty of Electrical Engineering, Ostfold University College, 1757 Halden, Norway

Energies, 2021, vol. 14, issue 15, 1-17

Abstract: This paper proposes a hybrid control scheme for a newly devised hybrid multilevel inverter (HMLI) topology. The circuit configuration of HMLI is comprised of a cascaded converter module (CCM), connected in series with an H-bridge converter. Initially, a finite set model predictive control (FS-MPC) is adopted as a control scheme, and theoretical analysis is carried out in MATLAB/Simulink. Later, in the real-time implementation of the HMLI topology, a hybrid control scheme which is a variant of the FS-MPC method has been proposed. The proposed control method is computationally efficient and therefore has been employed to the HMLI topology to mitigate the high-frequency switching limitation of the conventional MPC. Moreover, a comparative analysis is carried to illustrate the advantages of the proposed work that includes low switching losses, higher efficiency, and improved total harmonic distortion (THD) in output current. The inverter topology and stability of the proposed control method have been validated through simulation results in MATLAB/Simulink environment. Experimental results via low-voltage laboratory prototype have been added and compared to realize the study in practice.

Keywords: multilevel inverter (MLI); model predictive control (MPC); hybrid multilevel inverter (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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