Two-wavelength quadrature multipoint detection of partial discharge in power transformers using fiber Fabry-Perot acoustic sensors

Bo Dong, Ming Han, Anbo Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Scopus citations

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.

Original languageEnglish (US)
Title of host publicationFiber Optic Sensors and Applications IX
DOIs
StatePublished - 2012
EventFiber Optic Sensors and Applications IX - Baltimore, MD, United States
Duration: Apr 26 2012Apr 27 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8370
ISSN (Print)0277-786X

Conference

ConferenceFiber Optic Sensors and Applications IX
CountryUnited States
CityBaltimore, MD
Period4/26/124/27/12

Keywords

  • Partial discharge
  • acoustic sensor
  • multiplexing
  • quadrature detection

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Dong, B., Han, M., & Wang, A. (2012). Two-wavelength quadrature multipoint detection of partial discharge in power transformers using fiber Fabry-Perot acoustic sensors. In Fiber Optic Sensors and Applications IX [83700K] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8370). https://doi.org/10.1117/12.920816