Experimental study of different approaches to the measurement of mechanical vibrations in transformers with fiber-optic interferometric intrinsic sensors

J. A. Garcia-Souto; H. Lamela

doi:10.1117/12.623282

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23 May 2005 Experimental study of different approaches to the measurement of mechanical vibrations in transformers with fiber-optic interferometric intrinsic sensors

J. A. Garcia-Souto, H. Lamela

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Proceedings Volume 5855, 17th International Conference on Optical Fibre Sensors; (2005) https://doi.org/10.1117/12.623282
Event: 17th International Conference on Optical Fibre Sensors, 2005, Bruges, Belgium

Abstract

Interferometric sensing with an optical fiber as an intrinsic transducer is presented for core vibrations and windings vibrations inside two power transformers. Different approaches to in-field measurements are compared experimentally. The design of the fiber-optic probes is of enhanced sensitivity, with compensation of external influences and is shown to withstand the harsh transformer conditions. The sensors are based on detecting dynamic deformations in-contact with the magnetic laminates of the core, or dynamic displacement between two elements of a block inside the transformer. In all cases a differential scheme is used for detecting the elongation on one or more sections of a fiber, but several configurations are considered in the detection of the optical phase. Our results show direct measurements of the vibrations of the transformers at significant regions for its predictive diagnosis.

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J. A. Garcia-Souto and H. Lamela "Experimental study of different approaches to the measurement of mechanical vibrations in transformers with fiber-optic interferometric intrinsic sensors", Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); https://doi.org/10.1117/12.623282

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