Computationally Efficient FCS-MPC for Single-Phase Five-Level ANPC Inverter

Abstract

An efficient model predictive control (MPC) method with a low computational load is presented in this paper for five-level active neutral point clamped (5L-ANPC) converter. Three control objectives are considered in the developed control algorithm; current control, flying capacitor (FC) control and dc-link balancing. The proposed FCS-MPC method avoids the heavy calculation load required for the current prediction by exploiting the concept of the dead-beat predictive control method. Furthermore, the cost function evaluations per control sample are significantly reduced compared to traditional FCS-MPC. As a consequence, the execution time is considerably reduced. The validation of the proposed method in transient- and steady-state is verified by the experimental implementation. The performance is compared with the conventional FCS-MPC method.