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Detecting SO2 and CF4 under high concentration SF6 Using V-shaped Cavity Enhanced Raman Spectroscopy
- Source :
- 2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE).
- Publication Year :
- 2020
- Publisher :
- IEEE, 2020.
-
Abstract
- As an important and widely used electrical equipment, GIS (gas insulated switchgear) greatly affects the stability and safety of the entire power grid. By detecting the concentration of SF 6 decomposed component gases in GIS, we can judge the faults existing in the GIS, and prevent the corrosive decomposed gases from damaging the insulation. However, existing SF 6 decomposition component detection methods can are difficult to achieve relatively accurate simultaneous detection of multi-component gases. In this paper, a method using cavity enhanced Raman spectroscopy was developed to simultaneously detect SO 2 and CF 4 under high concentration SF 6 . Based on frequency-locking cavity enhancement technology, we coupled laser light with a wavelength of 642 nm and a power of about 50 mW into a V-shaped resonant cavity, and realized three orders of power enhancement. Due to the special V-shaped structure of the resonant cavity, the direct reflected light from the cavity mirror will not feedback to the laser, thereby avoiding false locking. Under 1 atmosphere pressure, Raman spectroscopy of CF 4 and SO 2 with a concentration of 1% was obtained. The characteristic Raman spectral lines of CF 4 and SO 2 were determined as 909 cm−1 and 1151 cm−1, respectively. responding to their v1 transition. And the Raman spectrum of CF 4 and SO 2 under the pressure of gradient distribution was obtained, it was found that the Raman characteristic peak intensity of CF 4 and SO 2 was highly linear between pressure relationship. Besides, the mixed gas of CF 4 and SO 2 under high concentration SF 6 was detected simultaneously without any interference. This study laid the foundation for Raman spectroscopy for the detection and quantitative analysis of SF 6 decomposed gas components, indicating that Raman spectroscopy has great potential in the field of SF 6 decomposed gas component detection.
- Subjects :
- Materials science
business.industry
010401 analytical chemistry
02 engineering and technology
021001 nanoscience & nanotechnology
Interference (wave propagation)
Laser
01 natural sciences
Spectral line
0104 chemical sciences
Semiconductor laser theory
law.invention
symbols.namesake
Wavelength
law
Electrical equipment
symbols
Optoelectronics
0210 nano-technology
Raman spectroscopy
business
Raman scattering
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- 2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE)
- Accession number :
- edsair.doi...........28ce657d47b28590cdabb29989003d38