Model Predictive Control Strategy for Three-Level Quasi-Z-Source Inverters

Model predictive control(MPC) strategy is pay more attention in power electronics applications. Inductor current, output current and capacitor voltage are selected as the factor of cost function for the proposed MPC. The discrete-time model of the MPC is designed to calculate inductor current, output current and capacitor voltage at next sampling time in each switching state, regulate the shoot-through duty cycle, and select the following switching vector for the Quasi-Z-Source inverter
$(\text{qZSI})$
. The optimal switching vector is decided, which avoids the traditional complicated modulated process. The MPC strategy is designed to can achieve desired dynamic performance for the
$\text{qZSI}$
, is beyond the traditional proportional-integral(PI)-type method.