Outdoor photoluminescence and electroluminescence imaging of photovoltaic silicon modules in a string

Vuković, M.; Høiaas, Ingeborg Eriksdatter; Jakovljević, Marko; Flø, Andreas Svarstad; Olsen, Espen; Burud, I.

doi:10.1063/5.0089308

Cited by 8 publications

(6 citation statements)

References 7 publications

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“…The instantaneous switching of the OP between two conditions results in images with two different PL signal intensities, but the reflected sunlight is expected to remain constant [8,12,18,20,[31][32][33][34]. These images are termed PL OP1 + R and PL OP2 + R. The delayed switching differs from instantaneous switching in the way that the reflected sunlight cannot be assumed constant and is termed R 1 and R 2 [19,23,35,44]. The image acquisition during IV curve sweeps results in a series of N images during the change of the OPs of the PV system, PL OPi + R, i = 1, 2, .…”

Section: Types Of Pl Images and Processing Algorithmsmentioning

confidence: 99%

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A review of imaging methods for detection of photoluminescence in field-installed photovoltaic modules

Vuković,

Wiig,

dos Reis Benatto

et al. 2024

Prog. Energy

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It is predicted that the photovoltaic energy conversion will be the largest installed power capacity by 2027. The least costly option for new electricity generation in many of the world’s countries will be the utility-scale solar photovoltaic electricity generation. Accurate monitoring of solar plants for localizing and detecting faults is expected to be one of the critical tasks facing the energy industry. Imaging of photovoltaic modules for the purpose of fault detection can be more efficient and accurate compared to measurements of electrical parameters. Different spectral regions provide different types of information about a faulty module. Detection of photoluminescence, that is, radiation emitted upon band-to-band recombination after charge carrier excitation with an illumination source, has shown a great potential in the laboratory setting. In the recent years, the first approaches in the outdoor setting have been conducted on silicon modules with the Sun and a LED module as excitation source. The present study sums up the different methods for outdoor photoluminescence imaging and emphasizes their differences regarding filtering of the reflected light from the photoluminescence signal. The different types of photoluminescence images obtained from each method and the image processing algorithms are described. Finally, the interpretation of the different types of photoluminescence images is addressed.

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Section: Types Of Pl Images and Processing Algorithmsmentioning

confidence: 99%

“…The equipment used for modulation of the OP must allow switching between three OPs to obtain two ∆PL OP images. This is the case with the DaySy system [31], MOSFET with a programmable DC load [34], LEDs (optical modulator) [19,20] and remote switching of the OP through the string inverter [5,23,44].…”

Section: Comparison Between El ∆Pl Op and Pl Imagesmentioning

confidence: 99%

A review of imaging methods for detection of photoluminescence in field-installed photovoltaic modules

Vuković,

Wiig,

dos Reis Benatto

et al. 2024

Prog. Energy

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“…Nevertheless, PL holds the advantage of keeping the Modules/strings connected without any disconnection and no requirement for power supply insertion, which is not the case in EL analysis [56]. Recent PL imaging advancements enable the subtraction of reflected sunlight and wireless changes to module operating points, facilitating simultaneous imaging of multiple modules without wiring, distinguishing it from electroluminescence imaging [57]. However, in situ solar PV PL imaging presents challenges due to disconnection, suitable power supply, modulation for weak signal extraction amidst strong sunlight interference, and the need for expensive InGaAs cameras with high quantum efficiency [58].…”

Section: Pl Imagingmentioning

confidence: 99%

“…However, in situ solar PV PL imaging presents challenges due to disconnection, suitable power supply, modulation for weak signal extraction amidst strong sunlight interference, and the need for expensive InGaAs cameras with high quantum efficiency [58]. Overcoming the overlap of reflected sunlight and emitted PL signal is achieved through two approaches: conducting imaging at a constant operating point using various optical filters [57] and employing electrical modulation [50]. An aerial vehicle platform for outdoor PL inspection has the potential to revolutionize the inspection process, becoming the new standard for routine assessments.…”

Section: Pl Imagingmentioning

confidence: 99%

Performance and degradation analysis for different solar photovoltaic technologies under hot and humid environment: a review

Makhija,

Bohra

2023

Prog. Energy

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Solar photovoltaic (SPV) systems installed on water bodies, i.e., floating solar PV (FSPV) and canal top solar PV (CTSPV), have gained significant propulsion in recent years, not only because of their enormous potential but also because of other additional co-benefits. This review article discusses the scope and potential of FSPV and CTSPV, an ambitious plan, and various upcoming FSPV projects in India. The review focuses on different degradation modes, failure mechanisms, characterization techniques and distinct factors influencing the degradation of SPVs operating in tropical climates. It was explored that potential induced degradation (PID) and materialistic degradation have a significant impact on the performance of SPV. The paper provides an overview of the test procedures outlined in IEC-61215 and IEC-62804 that pertain to SPV performance under hot and humid conditions. Additionally, it presents a comprehensive review of the various methodologies adopted for accelerated damp heat testing to predict the life of PV systems in such conditions, and their significant analytical and visual outcomes is elucidated. Also, till date, no simulation tool has been available to assess the long-term performance of SPV in a humid environment. As this energy generation technique is still in its infancy, this study will help many researchers and solar power developers recognize the impact of elevated and prolonged exposure to temperature and humidity on generation, degradation, and mode of failure for different SPV technologies.

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“…Table 1 provides a summary of new approaches aimed at improving the conventional technique. Many of the techniques that enable high-irradiance characterization use a lock-in technique [11][12][13][14][15][16][17]. The lock-in technique involves acquiring image pairs while the PV module is in two different operating points where luminescence emission is high and null, respectively.…”

Section: Introductionmentioning

confidence: 99%

Partial Photoluminescence Imaging for Inspection of Photovoltaic Cells: Artificial LED Excitation and Sunlight Excitation

Redondo Plaza,

Ngungu,

Gallardo Saavedra

et al. 2023

Energies

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Photovoltaic power is a crucial renewable energy source that has the potential to enhance a city’s sustainability. However, in order to identify the various issues that may occur during the lifespan of a photovoltaic module, solar module inspection techniques are crucial. One valuable technique that is commonly used is luminescence, which captures silicon emissions. This article focuses on a specific luminescence technique called partial photoluminescence. This technique involves illuminating a specific portion of the solar cell surface and recording the luminescence emission generated in the remaining area. This method has been trialed in a laboratory environment, utilizing infrared LEDs as the excitation source. An analysis of the main parameters that affect the technique is provided, where pictures have been taken under varying exposure times ranging from 50 ms to 400 ms, irradiance levels ranging from 200 W/m2 to 1000 W/m2, and a percentage of illuminated cells ranging from 10% to 40%. Furthermore, the experimental device has been modified to generate images utilizing sunlight as the excitation source. Several pictures of damaged cells were taken under an irradiance range of 340 W/m2 to 470 W/m2. The quality of the partial photoluminescence images is comparable to conventional electroluminescence images, but longer exposure times are required.

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Outdoor photoluminescence and electroluminescence imaging of photovoltaic silicon modules in a string

Cited by 8 publications

References 7 publications

A review of imaging methods for detection of photoluminescence in field-installed photovoltaic modules

A review of imaging methods for detection of photoluminescence in field-installed photovoltaic modules

Performance and degradation analysis for different solar photovoltaic technologies under hot and humid environment: a review

Partial Photoluminescence Imaging for Inspection of Photovoltaic Cells: Artificial LED Excitation and Sunlight Excitation

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