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International Journal of Photoenergy
Volume 2015 (2015), Article ID 294872, 9 pages
http://dx.doi.org/10.1155/2015/294872
Research Article

An Adaptive Photovoltaic Topology to Overcome Shading Effect in PV Systems

1Durham School of Architectural Engineering and Construction, PKI, University of Nebraska-Lincoln, 1110 S. 67th Street, Omaha, NE 68182, USA
2GE POWER & WATER, Toronto, ON, Canada M5J 2M2

Received 20 November 2014; Revised 3 March 2015; Accepted 3 March 2015

Academic Editor: Mahmoud M. El-Nahass

Copyright © 2015 Mohamed Amer Chaaban et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Shading in photovoltaic systems can cause many undesired effects. When shading occurs, the power generated from the PV system is much less than nominal power, increasing the electrical mismatching losses between PV system components. Active research to address this power loss focuses on static and adaptive systems. This paper addresses an adaptive system solution and proposes a new method to adaptively overcome losses due to shading during low radiation conditions. In addition, a statistical analysis for choosing the most feasible and efficient configuration for the system size is presented. The proposed system has been validated under shade conditions in a simulation and prototype experiment. The experiments are conducted using a PV system consisting of 10 PV modules located at the Petroleum Institute in the United Arab Emirates. The proposed system is shown to minimize the shading losses of the PV array in real time by an average of 100% under simulated conditions and 84% in practical experiments.