Improved model predictive control method for a five-level inverter with coupled inductors.

Aiming at the problem that the switching frequency is not fixed and the number of samples is large when using the traditional finite control set-model predictive control (FCS-MPC) method for a five-level inverter with coupled inductors, an improved model prediction method is proposed. This improved method combines the space vector pulse width modulation and the minimum current error optimization principle to design the modulation strategy, and combines the modulation function with the evaluation function to obtain a modulation function that satisfies the minimum current error. Compared with the traditional finite set model prediction method, the improved method can realize the balance of the coupled inductor current without measuring the coupled inductor current, can fix the switching frequency of power switches, and retains the rapidity of the traditional model predictive control. The effectiveness of the proposed method is verified by simulation and experiment. [ABSTRACT FROM AUTHOR]