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Dual-stage converter to improve transfer efficiency and maximum power point tracking feasibility in photovoltaic energy-conversion systems

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3 Author(s)
Sairaj V. Dhople ; Grainger Center for Electric Machinery and Electromechanics, Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA ; Ali Davoudi ; Patrick L. Chapman

This work addresses transfer efficiency and tracking ineffectiveness in switch-mode, dc-dc converters for photovoltaic energy-conversion systems. Tracking ineffectiveness constrains maximum power point tracking algorithms due to dc-dc converter operational constraints. Transfer efficiency quantifies the effect of switching-frequency ripple on the usable power extracted from the photovoltaic source. A dual-stage boost buck-boost converter is proposed as a solution to alleviate tracking ineffectiveness and enhance transfer efficiency. Simulations and experimental results indicate that both concerns are addressed by the proposed topology.

Published in:

Applied Power Electronics Conference and Exposition (APEC), 2010 Twenty-Fifth Annual IEEE

Date of Conference:

21-25 Feb. 2010