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Proceedings Paper

A hybrid fiber-optic sensor system for multi-stress monitoring of high-voltage power transformer
Author(s): Hyunjin Kim; Hyoung-jun Park; Minho Song
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Paper Abstract

For condition monitoring of high-voltage power transformers, a fiber-optic multi-stress sensing system is suggested by combining fiber grating sensors and mandrel sensors embedded in a fiber-optic Sagnac interferometer. The gratings and the mandrel sensors measure the temperature and the vibrations at multi-locations in a power transformer. To separate and demodulate the sensor outputs, we used a wavelength-sweeping laser source and placed a fiber-optic attenuator in the Sagnac loop, which enabled to separate the Bragg wavelengths from the transmission spectrum. The temperature and vibrations of multi-locations could be measured at the same time by using optical circuit and single signal processing unit.

Paper Details

Date Published: 7 November 2012
PDF: 4 pages
Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 8421BF (7 November 2012); doi: 10.1117/12.975129
Show Author Affiliations
Hyunjin Kim, Chonbuk National Univ. (Korea, Republic of)
Hyoung-jun Park, Electronics and Telecommunications Research Institute (Korea, Republic of)
Minho Song, Chonbuk National Univ. (Korea, Republic of)

Published in SPIE Proceedings Vol. 8421:
OFS2012 22nd International Conference on Optical Fiber Sensors
Yanbiao Liao; Wei Jin; David D. Sampson; Ryozo Yamauchi; Youngjoo Chung; Kentaro Nakamura; Yunjiang Rao, Editor(s)

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