Analysis of the configuration and the location of thermographic equipment for the inspection in photovoltaic systems |
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| Institution: | 1. Departamento de Ingeniería Eléctrica, Escuela Superior de Ingeniería, Universidad de Cádiz, Campus Universitario de Puerto Real, 11519 Puerto Real (Cádiz), Spain;2. Departamento de Ingeniería Eléctrica, Electrónica y Control, E.T.S. Ingenieros Industriales, U.N.E.D., C/ Juan del Rosal 12, 28040 Madrid, Spain;1. DuPont (China) Research & Development and Management Co., Ltd., 201203 Shanghai, China;2. DuPont Silicon Valley Technology Center, Sunnyvale, CA 94085, USA;3. E. I. du Pont de Nemours and Company, Wilmington, DE, USA;4. Jinko Solar Co., Ltd., 334100 Shangrao, Jiangxi Province, China;1. University Constantine 1, Faculty of Technology, Department of Electrical Engineering, MoDERNa Laboratory, Constantine 25000, Algeria;2. Laboratoire des systèmes électromécaniques, Université Badji mokhtar, Annaba, Algeria;3. Power Electronics and Renewable Energy Research Laboratory (PEARL), Department of Electrical Engineering, University of Malaya, Malaysia |
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| Abstract: | The infrared (IR) thermography is a non-destructive technique (NDT) which is used to carry out maintenance quickly and easily in photovoltaic (PV) systems. IR imaging with thermographic cameras under steady state conditions is a usual method for quality control of PV modules and plants in operation. For the proper IR inspection which determines the severity or the importance of the detected findings, it is necessary to consider different aspects of the configuration and the location of the thermographic equipment which allow reducing measuring errors. This paper considers some elements which contribute to the accurate configuration of the thermographic equipment. The influence of the reflected apparent temperature in outdoor IR inspections is analysed and it is proposed a simple method for obtaining it. Besides, the importance of the emissivity in IR thermography is analysed. For that, the value of the emissivity in PV modules of various types both front and rear shape is determined experimentally. It is also studied the proper location of the thermographic equipment in order to minimize reflections of the sun and the sky. For this objective, it is studied the ideal and minimum height of inspection according to the layout of the PV system. In a particular case, it is also analysed the influence of the horizontal angle of thermographic inspection and the reflected radiation. |
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| Keywords: | Infrared thermography PV system maintenance Glass emissivity Reflected radiation |
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