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Output Power Enhancement for Hot Spotted Polycrystalline Photovoltaic Solar Cells

Dhimish, Mahmoud, Holmes, Violeta, Mehrdadi, Bruce, Dales, Mark and Mather, Peter (2017) Output Power Enhancement for Hot Spotted Polycrystalline Photovoltaic Solar Cells. IEEE Transactions on Device and Materials Reliability. ISSN 1558-2574

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Abstract

Hot spotting is a reliability problem in photovoltaic (PV) panels where a mismatched cell heats up significantly and degrades PV panel output power performance. High PV cell temperature due to hot spotting can damage the cell encapsulate and lead to second breakdown, where both cause permanent damage to the PV panel. Therefore, the development of two hot spot mitigation techniques are proposed using a simple and reliable method. PV hot spots in the examined PV system was inspected using FLIR i5 thermal imaging camera. Multiple experiments have been tested during various environmental conditions, where the PV module I-V curve was evaluated in each observed test to analyze the output power performance before and after the activation of the proposed hot spot mitigation techniques. One PV module affected by hot spot was tested. The output power during high irradiance levels is increased by approximate to 1.26 W after the activation of the first hot spot mitigation technique. However, the second mitigation technique guarantee an increase in the power up to 3.97 W. Additional test has been examined during partial shading condition. Both proposed techniques ensure a decrease in the shaded PV cell temperature, thus an increase in the PV output power.

Item Type: Article
Additional Information: © © 2018 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.
Uncontrolled Keywords: Hot spot mitigation; Photovoltaic (PV) hot spotting analysis; Solar cells; Thermal imaging
Subjects: Q Science > Q Science (General)
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
T Technology > TR Photography
T Technology > TS Manufactures
Schools: School of Computing and Engineering
Related URLs:
Depositing User: Mahmoud Dhimish
Date Deposited: 12 Feb 2018 14:26
Last Modified: 12 Feb 2018 19:40
URI: http://eprints.hud.ac.uk/id/eprint/34073

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