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

被引：38
|
作者：
Li, X. Y. [1 ]
Xia, Y. X. [1 ]
Huang, J. M. [2 ]
Zhan, L. [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Inst Opt & Photon, Shanghai 200240, Peoples R China
[2] Shanghai Zhongyi Ind Control Tech Co Ltd, Shanghai 200023, Peoples R China
来源：
APPLIED PHYSICS B-LASERS AND OPTICS | 2008年 / 93卷 / 2-3期
关键词：
52; 25; Tx; 33; 20; Fb;
D O I：
10.1007/s00340-008-3170-8
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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.
引用
收藏
页码：665 / 669
页数：5
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