Optimized PV-Pumping System Using QUASI Z-Source Inverter (QZSI)

In this paper, a photovoltaic (PV)-pumping system using Quasi Z-Source Inverter (QZSI) is represented to replace the conventional two stages converters. QZSI has the ability to boost the input voltage due to the possibility of applying a shoot-through (ST) in the inverter. A model-based algorithm called
$\pmb{I}_{\pmb{mpp}}=\pmb{f}(\pmb{P}_{\mathbf{\max}})$
is used as a maximum power point tracking (MPPT) technique. This algorithm is optimized using genetic algorithm (GA) optimization to provide better system behaviour. A MATLAB/Simulink model is developed to verify the effectiveness of using the QZSI with the proposed technique in the PV-pumping system. Also, a comparison between perturb and observe (P&O), unoptimized
$\pmb{I}_{\pmb{mpp}}= \pmb{f}(\pmb{P}_{\mathbf{max}})$
and optimized
$\pmb{I}_{\pmb{mpp}}=\pmb{f}(\pmb{P}_{\mathbf{max}})$
MPPT algorithms is held using the results of the simulations.