TY - JOUR
T1 - Sulfur hexafluoride-filled extrinsic Fabry-Pérot interferometric fiber-optic sensors for partial discharge detection in transformers
AU - Dong, Bo
AU - Han, Ming
AU - Sun, Liqun
AU - Wang, Jiajun
AU - Wang, Yunjing
AU - Wang, Anbo
N1 - Funding Information:
Manuscript received January 18, 2008; revised April 25, 2008. This work was supported by Electric Power Research Institute under Contract EP-P24993/ C12094. B. Dong, M. Han, J. Wang, Y. Wang, and A. Wang are with the Center for Photonics Technology, Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061-0111 USA (e-mail: [email protected]). L. Sun is with the State Key Laboratory of Precision Measurement Technology and Instrument, Tsinghua University, Beijing 100084, China. Color versions of one or more of the figures in this letter are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/LPT.2008.928533
PY - 2008/9/15
Y1 - 2008/9/15
N2 - 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.
AB - 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.
KW - Fabry-Pérot (FP) interferometers
KW - Fiber-optic sensor
KW - Partial discharges (PDs)
KW - Side-hole fiber
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U2 - 10.1109/LPT.2008.928533
DO - 10.1109/LPT.2008.928533
M3 - Article
AN - SCOPUS:65349181014
SN - 1041-1135
VL - 20
SP - 1566
EP - 1568
JO - IEEE Photonics Technology Letters
JF - IEEE Photonics Technology Letters
IS - 18
ER -