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Impact of partial shading on voltage- and current-based maximum power point tracking of solar modules

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3 Author(s)
Masoum, A.S. ; Dept. of Electr. & Comput. Eng., Curtin Univ. of Technol., Perth, WA, Australia ; Padovan, F. ; Masoum, M.A.S.

Detailed theoretical analyses are presented to show the influence of partial shading on v-i and p-i characteristics of solar modules and to compare the accuracies of two simple, fast and reliable maximum power-point tracking (MPPT) techniques for photovoltaic (PV) systems: the voltage-based (VMPPT) and the current-based (CMPPT) approaches. Simulations are presented to highlight impacts of partial shading on MPPT of individual and series connected solar cells without and with the bypass diodes. A modified CMPPT approach is proposed to integrate partial shading. Results show considerable increase of captured maximum power compared with the conventional CMPPT, VMPPT and P&O tracking methods.

Published in:

Power and Energy Society General Meeting, 2010 IEEE

Date of Conference:

25-29 July 2010