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Modelling of a non-isolated DC-DC converter for low power PV application

Power available from solar photovoltaics (PV) is stochastic in nature because of non-uniform sun irradiation and variable cell temperature throughout the day. One of the essential parts of the solar PV system is the maximum power point tracker (MPPT). By matching source and load impedance, MPPT helps track the maximum power fed to the load. Current flows through a non-isolated DC-DC converter directly from the input to the output path. This paper modulates input from photovoltaic energy to a DC load through a buck converter with simple steps. The main objective is to design a DC-DC converter and an MPPT controller observing input impedance from the PV array. The verification of all results is done through Matlab/Simulink.