EU PVSEC · 2008 · 13 citations · 0 references
EngineeringElectrical EngineeringPower ElectronicsRenewable Energy IntegrationRenewable Energy SystemsDistributed Energy ResourcesPhotovoltaic DevicesSolar Energy SystemsSolar Photovoltaic SystemsSolar RadiationSolar ShadingGrid-connected Photovoltaic SystemsPhotovoltaic SystemsShadow Effects
The aim of this paper is the study of the impact of partial shading on a grid connected photovoltaic (PV) plant. Two technologies of PV modules are examined: multi-crystalline silicon and amorphous silicon. Two types of studies are made: On one hand, shadowing losses are assessed instantaneously under stable solar irradiance conditions. On the other hand, these losses are summed up during a five weeks period. Different types of shadows are tested. This study shows better results for amorphous silicon systems face to shadows. Partial shading may lead to complete system failures when the inverter stops operating when the Maximum Power Point voltage gets out of range. The results of these two cases are compared.