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Proceedings Paper

Spectrum absorption detecting fault gas dissolved in transformer oil
Author(s): Yutian Wang; Zong Meng; Hongli Sui
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Paper Abstract

Real-time detecting of the fault gas dissolved in the transformer oil is very important to the safe operation of the transformer. The traditional measuring method, that is chromatogram method, has many shortcomings, such as complicated operating, long analysis period, etc. The article adopted the spectrum absorption method to realize highly sensitive, on-line, remote measuring the main fault gas in the transformer oil, obtained the purpose of watching the transformer's work condition. It was a novel optical fiber sensor. This method offered high selectivity, long life, no influence of surroundings gases, no electric induction and so on. It is adapted to be used in the foul and hazardous environment. Fiber detecting will be realized on the base of separating the gas dissolved in the transformer oil. So the key technology is how to separate the fault gas from the transformer oil. Experiment indicates that polyflon membrane is an excellent medium for the main fault gas (CH4) permeation. A measuring method under unbalanced state based on equal time interval sampling is proposed. It not only decreases the difficulty in designing the gas cell, but also increases the real-time of measurement.

Paper Details

Date Published: 9 September 2002
PDF: 4 pages
Proc. SPIE 4920, Advanced Sensor Systems and Applications, (9 September 2002); doi: 10.1117/12.482025
Show Author Affiliations
Yutian Wang, Yanshan Univ. (China)
Zong Meng, Yanshan Univ. (China)
Hongli Sui, Yanshan Univ. (China)

Published in SPIE Proceedings Vol. 4920:
Advanced Sensor Systems and Applications
Yun-Jiang Rao; Julian D. C. Jones; Hiroshi Naruse; Robert I. Chen, Editor(s)

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