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PV output power enhancement using two mitigation techniques for hot spots and partially shaded solar cells

Dhimish, Mahmoud, Holmes, Violeta, Mehrdadi, Bruce, Dales, Mark and Mather, Peter (2018) PV output power enhancement using two mitigation techniques for hot spots and partially shaded solar cells. Electric Power Systems Research, 158. pp. 15-25. ISSN 0378-7796

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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 design and development of two hot spot mitigation techniques are proposed using a simple, costless and reliable method. The hot spots in the examined PV system was carried out using FLIER i5 thermal imaging camera.

Several experiments have been examined 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 1.25 W after the activation of the first hot spot mitigation technique. However, the second mitigation technique guarantee an increase of the power equals to 3.96 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 output measured power.

Item Type: Article
Uncontrolled Keywords: Hot spot protection; Photovoltaic (PV) hot spotting analysis; Solar cells; Thermal imaging
Subjects: Q Science > Q Science (General)
Q Science > QA Mathematics
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 14:14
Last Modified: 12 Feb 2018 14:19
URI: http://eprints.hud.ac.uk/id/eprint/34172

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