University of Oulu

C. Schuss et al., "Detecting Defects in Photovoltaic Cells and Panels With the Help of Time-Resolved Thermography Under Outdoor Environmental Conditions," 2020 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), Dubrovnik, Croatia, 2020, pp. 1-6, doi: 10.1109/I2MTC43012.2020.9128489

Detecting defects in photovoltaic cells and panels with the help of time-resolved thermography under outdoor environmental conditions

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Author: Schuss, Christian1; Remes, Kari1; Leppänen, Kimmo2;
Organizations: 1Optoelectronics and Measurement Techniques (OPEM) Research Unit, University of Oulu, Finland
2Mettler-Toledo GmbH, SBU AutoChem, Switzerland
3Institute of Electronic Sensor Systems, Graz University of Technology, Austria
4Circuits and Systems (CAS) Research Unit, University of Oulu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 3.3 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2020
Publish Date: 2020-10-02


This paper investigates defects in photovoltaic (PV) cell and panels, in particular, the size and location of defects. We concentrate on characterising photovoltaics under outdoor environmental conditions with the help of synchronized thermography (ST) and time-resolved thermography (TRT). Infrared (IR) images are obtained under changing solar radiation levels and moderate wind speeds with the help of a table IR-camera. We demonstrate that IR-images obtained outdoors by ST and TRT provide the same information in the same accuracy as IR-images recorded indoors. We elaborate the differences in parameters such as measurement time and region-of-interest (ROI) which need to be adjusted when moving from indoor to outdoor environments. Our technique allows maintenance staff to carry out measurements on the site of a PV power plant to identify PV panels with defects in an easy way.

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Series: IEEE International Instrumentation and Measurement Technology Conference
ISSN: 2642-2069
ISSN-E: 2642-2077
ISSN-L: 2642-2069
ISBN: 978-1-7281-4460-3
ISBN Print: 978-1-7281-4461-0
Pages: 1 - 6
Article number: 9128489
DOI: 10.1109/I2MTC43012.2020.9128489
Host publication: 2020 IEEE International Instrumentation and Measurement Technology Conference, I2MTC 2020
Conference: IEEE International Instrumentation and Measurement Technology Conference
Type of Publication: A4 Article in conference proceedings
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: Dr. Christian Schuss was funded by the Academy of Finland 6Genesis (6G) project (grant no. 318927). Prof. Tapio Fabritius is partially supported by Academy of Finlands FIRI funding (grant no. 320017).
Academy of Finland Grant Number: 318927
Detailed Information: 318927 (Academy of Finland Funding decision)
320017 (Academy of Finland Funding decision)
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