Multilevel converter-photovoltaic source based single-phase standalone generating system

This paper presents modeling and simulation of isolated single phase supply system comprises of photovoltaic system tracked for its Maximum Power Point (MPP) and single-phase multi-level Voltage Source Inverter (VSI). The Maximum Power Point Tracking (MPPT) based on Perturb-and-Observe (P&O) technique is proposed for extracting maximum power from the photovoltaic module. Furthermore, single-phase Five-Level unipoler PWM technique is used for producing five-levels in voltage source inverter (VSI), which is used for the conversion of dc voltage into approximately sinusoidal ac supply. The proposed system model is simulated in MATLAB/SIMULINK and tested for different environmental conditions. The extensive simulations are carried out to validate the proposed system.