In view of the issue of control performance improvement for multilevel three-phase cascaded Hbridge inverter

a kind of new model predictive control（MPC）strategy has been designed. The MPC controller predicts the future condition of the system based on the prediction model

and then calculates the switching vector that minimizes the designed cost function for output. However

unlike the traditional twolevel inverter

the mathematical model of multilevel cascaded H-bridge inverter is complex and contains a large number of voltage vectors

resulting in a heavy computational burden. For this reason

by setting and selecting effective voltage vector subset

the amount of calculation required to obtain the optimal voltage vector is significantly reduced without affecting the control performance simultaneously. The experimental platform of five-level and nine-level three-phase cascade H-bridge inverter is set up to develop related experiments.The superior control performance of the new MPC controller is verified by the experimental result.