Influence of Shading on Solar Cell Parameters and Modelling Accuracy Improvement of PV Modules with Reverse Biased Solar Cells

This paper presents an experimental investigation on the influence of shading mono-crystalline (mono-Si) solar cell parameters. The variations equivalent circuit parameters with were determined and then used in modelling a mono-Si photovoltaic (PV) module under partial shading. It was found that simulation by considering parameter single model did not lead to noticeable improvement accuracy. However, for PV module, significant accuracy reverse bias region achieved when all model. A further performed identify key are responsible improvement. results revealed addition photo-generated current, shunt resistance also has effect approach thus proposed, which includes variation shading, current. experimentally validated using module. show proposed is more accurate, compared considers only without need include avalanche breakdown term.