DESIGN AND SIMULATION OF IMPROVED DCDC CONVERTERS USING SIMULINK FOR GRID CONNECTED PV SYSTEMS

In this paper Maximum Power Point Tracking (MPPT) based Buck-Boost converter for battery charging is proposed for extracting maximum power from the Photo Voltaic (PV) system. There are number of MPPT tracking methods available to operate the PV system at maximum power point. In this proposed work Perturb & observe (P&O) MPPT algorithm is used for design and implementation, which provides the maximum power point irrespective of varying irradiance and temperature. Previously P&O MPPT is used for MPPT based Buck converters, but here much of interest is shown towards the design & simulation of MATLAB Simulink based Buck-Boost regulator system for PV array. This work also presented the improved methods of DC to DC conversion.