Output-Power Enhancement for Hot Spotted Polycrystalline Photovoltaic Solar Cells

Mahmoud Dhimish, Violeta Holmes, Behrooz Mehrdadi, Mark Dales, Peter Mather

Research output: Contribution to journalArticle

  • 3 Citations

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.
LanguageEnglish
Pages37-45
Number of pages8
JournalIEEE Transactions on Device and Materials Reliability
Volume18
Issue number1
Early online date6 Dec 2017
DOIs
Publication statusPublished - Mar 2018

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Photovoltaic cells
Solar cells
Chemical activation
Infrared imaging
Cameras
Temperature
Experiments
Hot Temperature

Cite this

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title = "Output-Power Enhancement for Hot Spotted Polycrystalline Photovoltaic Solar Cells",
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.",
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Output-Power Enhancement for Hot Spotted Polycrystalline Photovoltaic Solar Cells. / Dhimish, Mahmoud; Holmes, Violeta; Mehrdadi, Behrooz; Dales, Mark; Mather, Peter.

In: IEEE Transactions on Device and Materials Reliability, Vol. 18, No. 1, 03.2018, p. 37-45.

Research output: Contribution to journalArticle

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T1 - Output-Power Enhancement for Hot Spotted Polycrystalline Photovoltaic Solar Cells

AU - Dhimish,Mahmoud

AU - Holmes,Violeta

AU - Mehrdadi,Behrooz

AU - Dales,Mark

AU - Mather,Peter

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