Određivanje optimalnih nagibnih uglova fotonaponskih panela uz uvažavanje smanjenja direktne komponente iradijacije usled efekata senki u fotonaponskim sistemima

Abstract

This paper considers the influence of the tilt angle of photovoltaic (PV) panels on the total amount of insolation on the surface of these panels on a monthly and annual basis, with and without consideration of shading effect. Based on the obtained results, optimal tilt angles of the PV panels in order to achieve maximum insolation, are determined, as well as the optimal tilt angles for achieving maximum generated electrical energy, taking into account the temperature of the panel. Special attention in the paper is paid to the shading effect created by the panel rows within the PV system and its influence on the reduction of direct component of irradiation and optimal tilt angles for different distances between PV panel rows. In the paper two different models for solar insolation calculation were considered and described in detail, clear day model and real cloud condition model. In order to obtain the average daily solar irradiation on the inclined surface, in addition to appropriate extraterrestrial irradiations, available measurements of the irradiation on the horizontal surface during one year period were used.