Partially shaded photovoltaic panel

Abstract

This paper deals with a model of partially shaded photovoltaic module. It is build as an electric circuit consisting of individual solar cells and bypass diodes. The parameters and operating points of individual solar cells change depending on the solar cell temperature and the level of solar irradiance. The output characteristics of the photovoltaic module model are determined numerically by finding solutions for the given electrical circuit, considering solar irradiance on the surface of each individual solar cell. The proposed model can provide realistic behaviour of partially shaded photovoltaic module required in simulation tools used in the development of a micro inverter. The model was confirmed by measurements performed on the tested photovoltaic module.