Investigation of the effect of partial shading on series and parallel connected solar photovoltaic modules using lambert-W function

摘要

Partial shading (PS) is an inevitable condition for the installed Solar Photovoltaic (SPV) Panels. It has an adverse effect on the efficiency and output power of the panel. Under partially shaded condition the PV characteristics get more complex with multiple peaks. The decrease in the output power of the panel under partial shading conditions depend on the type and level of shading and also on the way modules are interconnected in it. The aim of this work is to investigate the behaviour of a series and parallel connected PV modules under partial shading conditions using Lambert-W function. In the present work a 3 × 3 array of KC200GT modules in series and parallel configurations are considered under seven different shading scenarios. Percentage power loss is calculated for each case and the comparative results are presented.