Shoot-Through Duty Ratio in Modulated Model Predictive Control for Quasi-Z-Source Based on Fuzzy Logic

This paper presents a novel approach to control a grid-connected Quasi-Z-Source Inverter (qZSI), employing a combination of Modulated Model Predictive Control (M2PC) and Fuzzy Logic Control (FLC). The objective was to achieve continuous operation of the PV system at its maximum power point while ensuring efficient tracking and delivery of power to the grid. To facilitate this, a current-based Perturb and Observe (P&O) Maximum Power Point Tracking (MPPT) algorithm was utilized to generate reference current for the FL controller. The system exhibited remarkable tracking dynamics and demonstrated autonomous grid current injection capabilities. Extensive simulations confirmed the feasibility and effectiveness of the proposed control techniques, showcasing their strong performance in regulating the grid-connected PV system.