Sulfur hexafluoride-filled extrinsic Fabry-Pérot interferometric fiber-optic sensors for partial discharge detection in transformers

Bo Dong, Ming Han, Liqun Sun, Jiajun Wang, Yunjing Wang, Anbo Wang

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

This letter presents a side-hole fiber-based extrinsic Fabry-Perot interferometric (EFPI) sensor whose cavity was filled with sulfur hexafluoride (SF6) for in situ power transformer partial discharge detection. The Fabry-Perot cavity was formed by a polished thin diaphragm and a cleaved side-hole fiber that were thermally fused onto a fused silica ferrule. The cavity was first vacuumed and then inflated with 300-kPa SF6 through the fiber side holes to increase its resistance to electric stress. Experimental results show that the sensor filled with SF6 was able to withstand electric stress of at least 10 kV/mm (ac root-mean-square value) in transformer oil, three times larger than that of a traditional air-filled EFPI sensor.

Original languageEnglish (US)
Pages (from-to)1566-1568
Number of pages3
JournalIEEE Photonics Technology Letters
Volume20
Issue number18
DOIs
StatePublished - Sep 15 2008

Fingerprint

Sulfur Hexafluoride
Sulfur hexafluoride
sulfur hexafluoride
Partial discharges
Fiber optic sensors
transformers
fiber optics
cavities
fibers
Fibers
sensors
Sensors
mean square values
Insulating oil
Power transformers
diaphragms
Fused silica
Diaphragms
oils
silicon dioxide

Keywords

  • Fabry-Pérot (FP) interferometers
  • Fiber-optic sensor
  • Partial discharges (PDs)
  • Side-hole fiber

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials

Cite this

Sulfur hexafluoride-filled extrinsic Fabry-Pérot interferometric fiber-optic sensors for partial discharge detection in transformers. / Dong, Bo; Han, Ming; Sun, Liqun; Wang, Jiajun; Wang, Yunjing; Wang, Anbo.

In: IEEE Photonics Technology Letters, Vol. 20, No. 18, 15.09.2008, p. 1566-1568.

Research output: Contribution to journalArticle

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