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

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

Research output: Contribution to journalArticle

  • 2 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 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.
LanguageEnglish
Pages15-25
Number of pages11
JournalElectric Power Systems Research
Volume158
Early online date6 Jan 2018
DOIs
Publication statusPublished - May 2018

Fingerprint

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

Cite this

@article{566d4cfbfe484383bf71e7891be9e796,
title = "PV output power enhancement using two mitigation techniques for hot spots and partially shaded 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 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.",
keywords = "Hot spot protection, Photovoltaic (PV) hot spotting analysis, Solar cells, Thermal imaging",
author = "Mahmoud Dhimish and Violeta Holmes and Behrooz Mehrdadi and Mark Dales and Peter Mather",
year = "2018",
month = "5",
doi = "10.1016/j.epsr.2018.01.002",
language = "English",
volume = "158",
pages = "15--25",
journal = "Electric Power Systems Research",
issn = "0378-7796",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - PV output power enhancement using two mitigation techniques for hot spots and partially shaded solar cells

AU - Dhimish,Mahmoud

AU - Holmes,Violeta

AU - Mehrdadi,Behrooz

AU - Dales,Mark

AU - Mather,Peter

PY - 2018/5

Y1 - 2018/5

N2 - 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.

AB - 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.

KW - Hot spot protection

KW - Photovoltaic (PV) hot spotting analysis

KW - Solar cells

KW - Thermal imaging

UR - https://www.sciencedirect.com/journal/electric-power-systems-research

U2 - 10.1016/j.epsr.2018.01.002

DO - 10.1016/j.epsr.2018.01.002

M3 - Article

VL - 158

SP - 15

EP - 25

JO - Electric Power Systems Research

T2 - Electric Power Systems Research

JF - Electric Power Systems Research

SN - 0378-7796

ER -