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Proceedings Paper

Fiber optic gas detection system for health monitoring of oil-filled transformer
Author(s): H. L. Ho; J. Ju; W. Jin
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Paper Abstract

This paper reports the development of a fiber-optic gas detection system capable of detecting three types of dissolved fault gases in oil-filled power transformers or equipment. The system is based on absorption spectroscopy and the target gases include acetylene (C2H2), methane (CH4) and ethylene (C2H4). Low-cost multi-pass sensor heads using fiber coupled micro-optic cells are employed for which the interaction length is up to 4m. Also, reference gas cells made of photonic bandgap (PBG) fiber are implemented. The minimum detectable gas concentrations for methane, acetylene and ethylene are 5ppm, 2ppm and 50ppm respectively.

Paper Details

Date Published: 5 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75030T (5 October 2009); doi: 10.1117/12.834904
Show Author Affiliations
H. L. Ho, The Hong Kong Polytechnic Univ. (Hong Kong, China)
J. Ju, The Hong Kong Polytechnic Univ. (Hong Kong, China)
W. Jin, The Hong Kong Polytechnic Univ. (Hong Kong, China)


Published in SPIE Proceedings Vol. 7503:
20th International Conference on Optical Fibre Sensors
Julian D. C. Jones, Editor(s)

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