2015
DOI: 10.1039/c4ay02648a
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Research on the detection of SF6 decomposition products based on non-resonant photoacoustic spectroscopy

Abstract: Using a low-cost infrared light source and a selection of narrowband filters, the non-resonant photoacoustic device is able to detect CO, SO2 and CF4 in SF6 down to a few ppm.

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Cited by 33 publications
(13 citation statements)
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“…For example, H. Heise et al [24] and X. Zhang et al [25] employed Fourier-transform infrared (FTIR) spectroscopy technology to perform quantitative multicomponent gas analysis for the SF 6 decompositions. J. Luo et al [26] employed a non-resonant photoacoustic spectroscopy sensor to detect SO 2 , CO and CF 4 by using a broadband light source within 4-8 μm wavelength range. However, most by-products have cross-interference absorption with pure SF 6 in the mid-infrared (MIR) region.…”
Section: Introductionmentioning
confidence: 99%
“…For example, H. Heise et al [24] and X. Zhang et al [25] employed Fourier-transform infrared (FTIR) spectroscopy technology to perform quantitative multicomponent gas analysis for the SF 6 decompositions. J. Luo et al [26] employed a non-resonant photoacoustic spectroscopy sensor to detect SO 2 , CO and CF 4 by using a broadband light source within 4-8 μm wavelength range. However, most by-products have cross-interference absorption with pure SF 6 in the mid-infrared (MIR) region.…”
Section: Introductionmentioning
confidence: 99%
“…The online detection for SF 6 decomposition is an effective means for fault early warning of electric power transmission equipment, which is based on the fact that SF 6 can be decomposed in the case of superheating and a partial discharge (PD) caused by latent inner insulation defects. In this process, various sulfur-containing, fluorinecontaining compounds, such as SF 4 , HF, SO 2 F 2 , SOF 2 , SO 2 , CO 2 ,CO, SF 4 , are generated via a reaction between water, oxygen, metal vapor or other impurities [1][2][3][4][5]. These decomposition gases can be employed as indicator gases to locate and identify fault types and their locations.…”
Section: Introductionmentioning
confidence: 99%
“…Sulfur hexafluoride (SF 6 ) gas has an excellent insulating property, which is widely used as an insulating medium in electric power systems, such as in gas-insulated switchgear (GIS), gas circuit breakers (GCBs), transformers (GIT) and transmission pipes (GIL) [1]. Normally, SF 6 is hard to decompose, but with successive reactions with contaminants such as water vapor and oxygen, various chemical byproducts, such as H 2 S, SO 2 , SF 4 , CO, CF 4 and SOF 2 are generated, which can chemically attack solid insulation materials and accelerate insulation aging and eventually lead to power system failure.…”
Section: Introductionmentioning
confidence: 99%