Improved mathematical modelling for PV module using MATLAB/Simulink

This paper presents a method of modelling photovoltaic (PV) module which is implemented in Simulink/MATLAB. Basically PV module is the medium for conversion of light into electricity. For the interaction between PV modules with a power converter, it is essential to define the simulation model. The characteristics of PV cells are affected by weather conditions like irradiance and temperature. So the changes in the weather conditions directly affect the outputs. The outputs for a PV cell are current, voltage and power. In this paper the single diode model is employed and for better accuracy both the shunt resistance and series resistance are considered and ideality factor of diode was adjusted with change in temperature. The PV cell can be described by taking a diode antiparallel to a constant current source. Here mathematical modelling of PV cell is designed by simulations. The variations of outputs are shown by varying irradiance and temperature.