Modulated Model Predictive Control of a Two-Level Inverter with Even-Order Harmonic Elimination

The even-order harmonics have detrimental effect on the grid compared with the triplen harmonics. In this paper, a novel modulated model predictive current control strategy capable of eliminating even-order harmonic components from the two-level inverter output voltage/current waveforms is proposed. The proposed control strategy combines the features of fast dynamic response from the classical model predictive control and fixed switching frequency operation from the linear control. The proposed control strategy regulates output currents through the duty cycle based cost function optimization. The optimal voltage vectors are used to form a P-type and N-type switching sequences depending on the sector number and generate the gating signals for the inverter. The performance of the proposed control strategy is validated through MATLAB simulations.