文档介绍：788 IEEE JOURNAL ON SELECTED TOPICS IN QUANTUM ELECTRONICS, VOL. 6, NO. 5, SEPTEMBER/OCTOBER 2000
Measurements of Mechanical Vibrations at ic
Cores of Power Transformers with Fiber-Optic
Interferometric Intrinsic Sensor
Horatio Lamela Rivera, Member, IEEE, Jose A. García-Souto, and J. Sanz
Abstract—A fiber-optic interferometric sensor with intrinsic tenance and diagnosis [1], [2], with requency response analysis
transducer along a length of the fiber is presented for vibration (FRA) of electric characteristics mon. Nevertheless,
measurements of the ic core inside an oil-filled power recent efforts have been made to deal with measuring other pa-
transformer. The sensor is designed for high sensitivity measure-
ments into the harsh environment of ic fields, wide rameters as temperature and vibrations [3], [4] and for example
temperature change, and in oil immersing. This sensor allows e partial discharges (PD) [5]. These are stretching related to the
nough sensitivity for the application, for which vibrations ampli- performance of the transformer. The temperature gives infor-
tudes are due to submicron displacements at frequencies of 100 mation of the isolation accuracy and cooling effectiveness, par-
Hz and its harmonics. in addition, the accessibility to the sensing ticularly where hot spots are detected. The vibrations of the
region is guaranteed by low size