Implementation Of A Stand-alone Photovoltaic System Based On Decentralized Dc-dc Converters
DOI:
https://doi.org/10.18618/REP.2010.3.220228Keywords:
Decentralized Photovoltaic Systems, MPPTAbstract
This paper proposes a stand-alone photovoltaic (PV) system that has as its input stage a set of DC-DC converters, which aim to perform the input energy processing with maximum power point tracking in a decentralized form. As battery charger the system possesses a bidirectional converter for controlling the power flux from/to battery bank, which is out of the main power path. The output stage is performed by an inverter. Previous studies have demonstrated that the decentralized input stage can provide an efficiency gain of 16% in situations where one or more photovoltaic panel is shaded, damaged or aged. The paper analyzes all operation modes of the proposed PV system, considering different levels of load energy demand and of solar irradiation. The proposed system is validated by simulation and experimental results.
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