Infrared thermography in inspection of photovoltaic panels

Glavaš, Hrvoje; Vukobratović, Marko; Primorac, Mario; Muštran, Daniel

doi:10.1109/sst.2017.8188671

Cited by 16 publications

(9 citation statements)

References 3 publications

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“…Localization of the fault is much faster performed by IR thermography due to thermal inertia causing measurement result do not depend on rapid changes in radiation. The main condition for the IR analysis is insolation of at least 500 W/m2, [7]. Photoluminescence is a process when the inversion voltage of a few hundred volts is applied to the panel system when the panels begin to emit the light we detect in the near IR part of the spectrum with the camera and in the IR part of the spectrum by IR thermal camera.…”

Section: The Usual Pv Panel Testing Methodsmentioning

confidence: 99%

Infrared Thermography in Maintenance of Building Applied Photovoltaics

Glavaš¹,

Vidaković²,

Jeršek³

et al. 2022

joe

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Photovoltaic Systems (PV) are the most widely used renewable energy source in the Republic of Croatia but with a modest share in the total energy balance. EU energy policy encourages PV installation in building elements such as facades, roofs or separate constructions with the aim of achieving zero-energy buildings. Whether an integrated or stand-alone system during their lifetime requires periodic maintenance. In a normal operation, it is necessary to carry out a visual inspection twice a year before and after the winter period to determine the condition of the equipment, connecting lines and supporting structures. In the case of a significant deviation from the normal production, the inspection must be done as soon as possible. Most commonly, the problems of the unmaintained system cannot be perceived as long as the PV system is in an operational state. Dropping of dust, bird droppings or shading over a longer period may lead to system components being damaged and to necessary repair costs that can be prevented by regular maintenance procedures, including regular surface cleaning of photovoltaic panels. Infrared thermography is a fast method of detecting heat sources due to shading or defective photovoltaic module elements. The paper provides visual examples of thermal spots that can be observed during the infrared thermographic inspection of photovoltaic systems, as well as a review of their impact on the system.

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Section: The Usual Pv Panel Testing Methodsmentioning

confidence: 99%

Infrared Thermography in Maintenance of Building Applied Photovoltaics

Glavaš¹,

Vidaković²,

Jeršek³

et al. 2022

joe

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“…Wavelengths detectable by infrared thermography in comparison with total radiation spectrum of the Sun and the Earth 15 …”

Section: Ir Thermal Inspectionmentioning

confidence: 99%

Infrared thermography as evaluation method of a faulty status of a LED LCD TV

et al. 2020

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The paper presents the application of infrared thermography in the detection of anomalies (hotspots) that may lead to defects of the backlight unit, which are not yet noticeable in the visible part of the electromagnetic spectrum. It is shown on a practical example of an LED LCD TV how hotspots at the maximum level of brightness led to the failure of one element of the LED backlight segments in 2 years time. Once the faulty element was detected, brightness was reduced in order to preserve the remaining LED elements. Infrared thermographic analysis of the faulty state was repeated and compared with measurements of photometric values. The thermal analysis results, before and after failure, are displayed in line at the area of the LED elements and in 3D on the screen surface. The photometric analysis was done on the full-screen area in each of the RGB channels and then followed with in-detail measurements on 200 points. As most photons emitted from the diode are dispersed to the sides of the display due to the lens mounted on top of each LED and other optical elements, data obtained by photometric means are not as precise in the positioning of faulty LEDs, as ones obtained by thermal inspection.

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“…The particular NDE problem under investigation was the detection of water ingress into solar panels. While camera-based thermography has been applied to detecting faults and operational problems in photovoltaic solar panels [19], water ingress is a particular problem that is of interest to the power generation industry.…”

Section: Use Of Nir Spectra To Detect Water In Solar Panelsmentioning

confidence: 99%

Multi-spectral near infrared NDE of polymer composites

Senni

Laureti

Rizwan

et al. 2019

NDT & E International

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Near infrared signals have been used to generate images of the internal structure of fibre-reinforced polymer and foam-filled honeycomb samples. Several different measurement configurations have been investigated, including the use of both modulated light-emitting diodes at discrete wavelengths and broad bandwidth illumination. It is shown that transmission through the samples is wavelengthdependent, and that artificial defects can be detected within polymer composite materials. In addition, wavelength-dependent properties have been used to detect changes due to water ingress into both composite materials and a solar panel structure, leading to a non-contact NDE technique.

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Infrared thermography in inspection of photovoltaic panels

Cited by 16 publications

References 3 publications

Infrared Thermography in Maintenance of Building Applied Photovoltaics

Infrared Thermography in Maintenance of Building Applied Photovoltaics

Infrared thermography as evaluation method of a faulty status of a LED LCD TV

Multi-spectral near infrared NDE of polymer composites

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