Abstract
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 H2. The detectability of the system satisfies the requirements of gas diagnosis in power transformer.
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Li, X.Y., Xia, Y.X., Huang, J.M. et al. A Raman system for multi-gas-species analysis in power transformer. Appl. Phys. B 93, 665–669 (2008). https://doi.org/10.1007/s00340-008-3170-8
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DOI: https://doi.org/10.1007/s00340-008-3170-8