FBG two-dimensional vibration sensor for power transformers

Catarina S. Monteiro; A. Vaz; D. Viveiros; C. Linhares; S. M. O. Tavares; H. Mendes; S. O. Silva; P. V. S. Marques; O. Frazão

doi:10.1117/12.2541132

28 August 2019 FBG two-dimensional vibration sensor for power transformers

Catarina S. Monteiro, A. Vaz, D. Viveiros, C. Linhares, S. M. O. Tavares, H. Mendes, S. O. Silva, P. V. S. Marques, O. Frazão

Author Affiliations +

Proceedings Volume 11199, Seventh European Workshop on Optical Fibre Sensors; 111990M (2019) https://doi.org/10.1117/12.2541132
Event: Seventh European Workshop on Optical Fibre Sensors, 2019, Limassol, Cyprus

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.

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Catarina S. Monteiro, A. Vaz, D. Viveiros, C. Linhares, S. M. O. Tavares, H. Mendes, S. O. Silva, P. V. S. Marques, and O. Frazão "FBG two-dimensional vibration sensor for power transformers", Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors, 111990M (28 August 2019); https://doi.org/10.1117/12.2541132

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