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Computationally efficient modified model predictive control for 2L-VSI with common mode voltage mitigation

This paper proposes a computationally efficient modified model predictive control (MMPC) scheme for a two-level voltage source inverter (2L-VSI) with common-mode voltage (CMV) reduction. Two main aspects of the proposed MMPC scheme are explored: (a) computational efficiency, by transforming the cost function into voltage domain and reduction of the number of compared options to only 2; (b) harmonic performace, by comparison to standard MPC and standard SVM, with and without CMV reduction. Findings of the paper are validated by simulations in Matlab-Simulink. It has been concluded that MPC has advantages over SVM if, due to application constraints, CMV needs to be reduced.