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International Journal of Photoenergy
Volume 2010, Article ID 312580, 13 pages
Research Article

Maximizing Output Power of a Solar Panel via Combination of Sun Tracking and Maximum Power Point Tracking by Fuzzy Controllers

1Electrical and Computer Department, Iranian Research Organization for Science and Technology, Tehran 15815/3538, Iran
2Electrical Engineering Department, Amirkabir University of Technology, Tehran 15916-34311, Iran

Received 6 September 2010; Revised 2 December 2010; Accepted 27 December 2010

Academic Editor: Raghu N. Bhattacharya

Copyright © 2010 Mohsen Taherbaneh 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.


In applications with low-energy conversion efficiency, maximizing the output power improves the efficiency. The maximum output power of a solar panel depends on the environmental conditions and load profile. In this paper, a method based on simultaneous use of two fuzzy controllers is developed in order to maximize the generated output power of a solar panel in a photovoltaic system: fuzzy-based sun tracking and maximum power point tracking. The sun tracking is performed by changing the solar panel orientation in horizontal and vertical directions by two DC motors properly designed. A DC-DC converter is employed to track the solar panel maximum power point. In addition, the proposed system has the capability of the extraction of solar panel curves. Experimental results present that the proposed fuzzy techniques result in increasing of power delivery from the solar panel, causing a reduction in size, weight, and cost of solar panels in photovoltaic systems.