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FBG two-dimensional vibration sensor for power transformers
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Paper Abstract

Power transformers are at the core of power transmission systems. The occurrence of system failure in power transformers can lead to damage of adjacent equipment and cause service disruptions. Structural and electrical integrity assessment in real time is of utter importance. Conventional techniques, typically electrical sensors or chemical analysis, present major drawbacks for real-time measurements due to high electromagnetic interference or for being time-consuming. Optical fiber sensors can be used in power transformers, as they are compact and immune to electromagnetic interferences. In this work, an optical fiber sensor composed by 2 fiber Bragg gratings, attached in a cantilever structure was explored. The prototype was developed with a 3D printer using a typical filament (ABS) that enable a fast and low-cost prototyping. The response of the sensor to vibration was tested using two different vibration axes for frequencies between 10 and 500 Hz. Oil compatibility was also studied using thermal aging and electrical tests. The studies shown that ABS is compatible with the power transformer mineral oil, but the high working temperatures may lead to material creeping, resulting in permanent structural deformation.

Paper Details

Date Published: 28 August 2019
PDF: 4 pages
Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors, 111990M (28 August 2019); doi: 10.1117/12.2541132
Show Author Affiliations
Catarina S. Monteiro, INESC TEC (Portugal)
A. Vaz, INESC TEC (Portugal)
D. Viveiros, INESC TEC (Portugal)
C. Linhares, Efacec Energia, Máquinas e Equipamentos Eléctricos, S.A. (Portugal)
S. M. O. Tavares, Efacec Energia, Máquinas e Equipamentos Eléctricos, S.A. (Portugal)
H. Mendes, Efacec Energia, Máquinas e Equipamentos Eléctricos, S.A. (Portugal)
S. O. Silva, INESC TEC (Portugal)
P. V. S. Marques, INESC TEC (Portugal)
O. Frazão, INESC TEC (Portugal)


Published in SPIE Proceedings Vol. 11199:
Seventh European Workshop on Optical Fibre Sensors
Kyriacos Kalli; Sinead O. O'Keeffe; Gilberto Brambilla, Editor(s)

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