On circuital topologies and reconfiguration strategies for PV systems inpartial shading conditions: A review

摘要

Photovoltaic (PV) power generation is heavily influenced by mismatching conditions,mainly caused by partial or full shading of an array portion. Such a non-uniform irradiation can leadto severe reductions in the power produced; some techniques, such as array reconfiguration or microconvertersand microinverters technology are aimed at retrieving this power together with the use ofMaximum Power Point (MPP) tracker algorithms, while others tend to mitigate the e ects that powerlosses have on the PV system, i.e. overheating and aging. Solutions based on the use of bypass diodesand their re-adapted forms belong to this latter case. The complexity of the problem has shown theneed of analyzing the role played by each one of the mentioned aspects; the focus of this paper is togive the reader a detailed review of the main solutions to PV arrays shading present in literature.