Distributed Maximum Power Point Tracking of Photovoltaic Arrays: Novel Approach and System Analysis
Femia, N.; Lisi, G.; Petrone, G.; Spagnuolo, G.; Vitelli, M.
Industrial Electronics, IEEE Transactions on
Volume 55, Issue 7, July 2008 Page(s):2610 - 2621
Digital Object Identifier   10.1109/TIE.2008.924035
Summary:One of the major drawbacks of photovoltaic (PV) systems is represented by the effect of module mismatching and of partial shading of the PV field. Distributed maximum power point tracking (DMPPT) is a very promising technique that allows the increase of efficiency and reliability of such systems. Modeling and designing a PV system with DMPPT is remarkably more complex than implementing a standard MPPT technique. In this paper, a DMPPT system for PV arrays is proposed and analyzed. A dc and small-signal ac model is derived to analyze steady-state behavior, as well as dynamics and stability, of the whole system. Finally, simulation results are reported and discussed.

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