Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/37120
Title: Thermography-based virtual MPPT scheme for improving PV energy efficiency under partial shading conditions
Authors: Hu, Y.
Cao, W.
Wu, J.
Ji, Bing
Holliday, D.
First Published: 1-Jul-2014
Publisher: Institute of Electrical and Electronics Engineers (IEEE), United States
Citation: IEEE Transactions on Power Electronics, 2014, 29, pp. 5667-5672
Abstract: This paper proposes a new thermography-based maximum power point tracking (MPPT) scheme to address photovoltaic (PV) partial shading faults. Solar power generation utilizes a large number of PV cells connected in series and in parallel in an array, and that are physically distributed across a large field. When a PV module is faulted or partial shading occurs, the PV system sees a nonuniform distribution of generated electrical power and thermal profile, and the generation of multiple maximum power points (MPPs). If left untreated, this reduces the overall power generation and severe faults may propagate, resulting in damage to the system. In this paper, a thermal camera is employed for fault detection and a new MPPT scheme is developed to alter the operating point to match an optimized MPP. Extensive data mining is conducted on the images from the thermal camera in order to locate global MPPs. Based on this, a virtual MPPT is set out to find the global MPP. This can reduce MPPT time and be used to calculate the MPP reference voltage. Finally, the proposed methodology is experimentally implemented and validated by tests on a 600-W PV array.
DOI Link: 10.1109/TPEL.2014.2325062
ISSN: 0885-8993
Links: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6847186&filter%3DAND%28p_IS_Number%3A6850100%29
http://hdl.handle.net/2381/37120
Version: Post-print
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2014, IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Appears in Collections:Published Articles, Dept. of Engineering

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