1 February 2009 Extrinsic and intrinsic fiber optic interferometric sensors for acoustic detection in high-voltage environments
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Abstract
Incipient fault diagnosis is closely related to insulation condition assessment. A great number of methods are available for condition monitoring and diagnosis of power transformer insulation systems, but only few of them can take direct measurements inside the transformer. Fiber optic sensors can be applied to incipient fault diagnosis. In particular, acoustic sensors have been developed for detection and location of partial discharges in oil-filled power transformers. We report the study of extrinsic and intrinsic fiber Fabry-Pérot sensors that can be used to detect the acoustic waves that are generated by a partial discharge inside a power transformer. A comparative analysis is done to determine the best sensing head configuration and some methods to improve the parameter readout sensitivity are proposed. The sensing head behaviour when immersed in different fluids (air, water, and oil) is also investigated.
© (2009) Society of Photo-Optical Instrumentation Engineers (SPIE)
Sanderson E. U. Lima, Orlando Frazão, F. M. Araujo, L. A. Ferreira, Vladimiro Miranda, José Luís Santos, "Extrinsic and intrinsic fiber optic interferometric sensors for acoustic detection in high-voltage environments," Optical Engineering 48(2), 024401 (1 February 2009). https://doi.org/10.1117/1.3080752 . Submission:
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