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Proceedings Paper

Characterization of temperature and vibrations in a medium-power transformer using an optical fiber interferometer
Author(s): Horacio Lamela; Jose Antonio Garcia Souto; J. Sanz Feito
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Paper Abstract

We investigate the measurement of vibrations at the core and windings of the transformer, as well as the differential temperature between zones. We present first results of vibrations measurements at the magnetic core of an oil- filled power transformers. The sensor is based on an intrinsic transducer of the dynamic strain at the surface into changes of the optical path of a segment of fiber. The sensing length is bonded to the core, immersing in oil and inside the transformer environment. Interferometric sensing is accomplished for high sensitivity because the vibrations are due to dynamic strain up to a few (mu) (epsilon) . It allows short probe lengths to be used, though an increase of the length could be used for enhancing the sensitivity. A common accessing of the fibers of the interferometer is used for reducing the common disturbance. The spectral decomposition of the output signals is shown and it is related to the electric reference and the behavior of the transformer.

Paper Details

Date Published: 31 August 2000
PDF: 8 pages
Proc. SPIE 4074, Applications of Optical Fiber Sensors, (31 August 2000); doi: 10.1117/12.397894
Show Author Affiliations
Horacio Lamela, Univ. Carlos III de Madrid (Spain)
Jose Antonio Garcia Souto, Univ. Carlos III de Madrid (Spain)
J. Sanz Feito, Univ. Carlos III de Madrid (Spain)

Published in SPIE Proceedings Vol. 4074:
Applications of Optical Fiber Sensors
Alan J. Rogers, Editor(s)

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