Abstract
When SF6 gas insulated electrical equipment has latent defects, SF6 insulation gas in the equipment is subject to high temperature or electric arc, which will decompose and generate decomposition products, these products lead to the degradation of insulation and arc extinguishing performance of electrical equipment. It is of great significance to detect the decomposition products of SF6, which can reflect the internal conditions of the equipment. The main decomposition product of SF6 is SO2. In order to detect SO2 in the electrical equipment, in this paper, an experimental platform for gas detection is built, which is based on infrared spectrum analysis and wavelength modulation technology. Through analyzing the second harmonic waveform of SO2 with different concentrations, it is concluded that the SO2 concentration and the average value of the second harmonic peak have a good linearity, and the error analysis of different concentrations of SO2 is further carried out. The experimental results show that there is a good linear relationship between SO2 concentration and the average peak value of the second harmonic wave, and the R2 is 0.992. The inversion error of SO2 with different concentrations are all within 5%. The experimental results prove that the detection method in this paper can effectively detect trace SO2.
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Lu, Y. et al. (2023). The Detection of SF6 Decomposition Components Based on Infrared Laser Spectroscopy. In: Dai, D., Zhang, C., Fang, Z., Lu, X. (eds) Proceedings of the 4th International Symposium on Plasma and Energy Conversion. ISPEC 2022. Springer Proceedings in Physics, vol 391. Springer, Singapore. https://doi.org/10.1007/978-981-99-1576-7_37
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DOI: https://doi.org/10.1007/978-981-99-1576-7_37
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