A Maximum Power Point Tracking System With Parallel Connection for PV Stand-Alone Applications
Gules, R.; De Pellegrin Pacheco, J.; Hey, H.L.; Imhoff, J.
Industrial Electronics, IEEE Transactions on
Volume 55, Issue 7, July 2008 Page(s):2674 - 2683
Digital Object Identifier 10.1109/TIE.2008.924033
Summary:This paper presents the analysis, design, and implementation of a parallel connected maximum power point tracking (MPPT) system for stand-alone photovoltaic power generation. The parallel connection of the MPPT system reduces the negative influence of power converter losses in the overall efficiency because only a part of the generated power is processed by the MPPT system. Furthermore, all control algorithms used in the classical series-connected MPPT can be applied to the parallel system. A simple bidirectional dc-dc power converter is proposed for the MPPT implementation and presents the functions of battery charger and step-up converter. The operation characteristics of the proposed circuit are analyzed with the implementation of a prototype in a practical application.
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