Model Predictive Control of 5L-ANPC Converters with Level-Shifted Pulse-Width-Modulation

Model predictive control (MPC) is a promising control strategy for five-level active-neutral-point-clamped (5L-ANPC) converters due to its fast dynamic performance and intuitive implementation process. However, due to a large number of the switching states of the 5L-ANPC converter, classical MPC of 5L-ANPC converters experiences a heavy computational burden. Moreover, its steady-state performance is not satisfactory due to the lack of modulators. This paper investigated the inherent feature of the level-shifted pulse-width-modulation (LS-PWM) and integration of the LS-PWM to the MPC. The resulting MPC with LS-PWM scheme provides comparative performance to that of a linear controller with LS-PWM. The computational burden can be reduced using the hexagon selection. Experimental results show that the good steady-state performance of the proposed MPC method while retaining the fast dynamic of MPC.