Développement et implémentation d’une commande prédictive d’onduleurs de type Z-source dédiés à une installation à énergie photovoltaïque

Abstract

This research work deals with the integration of photovoltaic (PV) energy to the electrical grid by the design ofthe power electronic interface. In this context, the single-stage topology based on quasi Z-source inverter is considered. Three different approaches for MPC control of qZSI-based systems have been developed. The main objective of the first approach is to achieve good dynamic performance by controlling the input current, the DC link voltage and the three-phase output current. In addition, the proposed control ensures circuit stability by controlling the inductor current and the capacitor voltage. The second proposed MPC control is dedicated to a grid-connected PV system.The results obtained showed the system's ability to track and deliver the maximum power of the GPV with a fast tracking dynamics in addition to independently compensating the reactive power of the load connected to the PCC point. The third one proposed MMPC control, which is a modified MPC, is applied to a PV system, based on the qZSI, tied to the grid. Its objective is to minimize the power losses in the inverter switches, inject a sinusoidal current into the grid, and regulate the voltages of the capacitors. In this framework, three novel MPPT control techniques have been developed, an improved P&O MPPT algorithm, integrating a fuzzy logic controller with variable step size, an intelligent MPPT method based on FTSM and GWO algorithms in partially shaded situations on a global MPP, a novel hybrid MPPT technique using Honey Badger (HBA) and Coyote Optimizer (COA) for partially shaded PV systems.