Spectrum absorption detecting fault gas dissolved in transformer oil

Yutian Wang; Zong Meng; Hongli Sui

doi:10.1117/12.482025

9 September 2002 Spectrum absorption detecting fault gas dissolved in transformer oil

Yutian Wang, Zong Meng, Hongli Sui

Proceedings Volume 4920, Advanced Sensor Systems and Applications; (2002) https://doi.org/10.1117/12.482025
Event: Photonics Asia, 2002, Shanghai, China

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.

Citation Download Citation

Yutian Wang, Zong Meng, and Hongli Sui "Spectrum absorption detecting fault gas dissolved in transformer oil", Proc. SPIE 4920, Advanced Sensor Systems and Applications, (9 September 2002); https://doi.org/10.1117/12.482025

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