International Research Journal of Education and Technology

This paper discusses the solar powered dc to dc buck boost converter which can work in both buck mode and in boost mode according to the requirement. It requires only two switches and by properly controlling the switches, buck or boost mode can be achieved. The main purpose of this project is to design an inverter that will enable the inversion of a DC power source, supplied by Photovoltaic (PV) Cells, to an AC power source that will be either used to supply a load or connected directly to the utility grid. The system will be controlled to operate at maximum efficiency using Maximum Power Point Tracking (MPPT) algorithm. This algorithm will be installed on a controller. The MATLAB simulated model of the solar panel followed by the dc –dc converter is presented and waveforms obtained are discussed. The dc to dc converter model is programmed in MPPT mode using optimal duty ratio to achieve maximum output. The    performance of the complete system model under varying insolation levels of solar panel is discussed.