Photovoltaic Grid Integrated System Based on MPPT Technique By using MATLAB/SIMULINK

Abstract

This paper provides an easy accurate method of modeling photovoltaic arrays. The methodis comfortable to obtain the parameters of the array model using information from the datasheet. The electric system consists of a photovoltaic module (PV) module, a DC/DC converter and a DC/AC converter to release the grid connection. A maximum-power point tracking (MPPT) technique is used to extract maximum amount of power from solar cells. The photovoltaic model is established using basic circuit equations of the Photovoltaic (P-V) cells including the effects of solar radiation and temperature changes. One-diode equivalent circuit is used in order to study I-V and P-V characteristics of a typical 36W solar module and draws results according to values changes of the temperature and solar irradiation which is observed in MATLABSIMULINK. Hence, the P-V module has nonlinear characteristics, and the Photovoltaic system characteristic curves such as current-voltage (I-V) and power-voltage (P-V) characteristics are drawn according to values change in temperature and solar radiation which is observed in MATLAB-SIMULINK.