A Raman system for multi-gas-species analysis in power transformer

作者：Li, X Y; Xia, Y X^*; Huang, J M; Zhan, L

来源：Applied Physics B: Lasers and Optics , 2008, 93(2-3): 665-669.

DOI：10.1007/s00340-008-3170-8

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We have built a complete Raman detection system for multi-trace-gas diagnosis, which is suitable for analyzing the dissolved gases in electric power system. In the system, a high-sensitivity CCD device connected to a spectrometer is used as the detection unit of the Raman system. A near-confocal cavity is used for improving the detection sensitivity of the system. In the effective spectral range of about 570-710 nm, Raman spectra of eight typical gases are achieved by using this Raman system. The detection limits for different gases have been obtained: 126 ppm for CO2, 21 ppm for CH4, 63 ppm for C2H4, 42 ppm for C2H2, 96.6 ppm for H-2. The detectability of the system satisfies the requirements of gas diagnosis in power transformer.

• 出版日期2008-11
• 单位上海交通大学