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Proceedings Paper

Two-wavelength quadrature multipoint detection of partial discharge in power transformers using fiber Fabry-Perot acoustic sensors
Author(s): Bo Dong; Ming Han; Anbo Wang
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Paper Abstract

A reliable and low-cost two-wavelength quadrature interrogating method has been developed to demodulate optical signals from diaphragm-based Fabry-Perot interferometric fiber optic sensors for multipoint partial discharge detection in power transformers. Commercial available fused-silica parts (a wafer, a fiber ferrule, and a mating sleeve) and a cleaved optical single mode fiber were bonded together to form an extrinsic Fabry-Perot acoustic sensor. Two lasers with center wavelengths separated by a quarter of the period of sensor interference fringes were used to probe acousticwave- induced diaphragm vibration. A coarse wavelength-division multiplexing (CWDM) add/drop multiplexer was used to separate the reflected two wavelengths before two photo detectors. Optical couplers were used to distribute mixed laser light to each sensor-detector module for multiplexing purpose. Sensor structure, detection system design and experiment results are presented.

Paper Details

Date Published: 11 May 2012
PDF: 11 pages
Proc. SPIE 8370, Fiber Optic Sensors and Applications IX, 83700K (11 May 2012); doi: 10.1117/12.920816
Show Author Affiliations
Bo Dong, Virginia Polytechnic Institute and State Univ. (United States)
Ming Han, Univ. of Nebraska-Lincoln (United States)
Anbo Wang, Virginia Polytechnic Institute and State Univ. (United States)

Published in SPIE Proceedings Vol. 8370:
Fiber Optic Sensors and Applications IX
Henry H. Du; Gary Pickrell; Eric Udd, Editor(s)

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