Analysis of decomposition products of sulfur hexafluoride in negative dc corona with special emphasis on content of H/sub 2/O and O/sub 2/

“…The production rates for S2F10, S2OF10, and S2O2F10 from both negative-glow corona and spark discharges were also measured for SF6/O2 mixtures containing up to 10% by volume of O2, and the results are compared with previous experimental results. (10,11,15) Some of the data presented here have also been discussed in earlier conference reports. (8,16,17) 2.…”

Section: Introductionsupporting

confidence: 54%

Production of S2F10, S2OF10, and S2O2F10 from Spark and Negative-Corona Discharges in SF6 and SF6/O2 Gas Mixtures

et al. 1996

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“…The results show that H 2 O plays a significant role in kinds, contents and variation rules of SF 6 decomposition components. However, the study on SF 6 decomposition characteristics under the effect of H 2 O mainly focuses on the spark discharge, partial discharge and arc discharge [23][24][25][26]. The influence of trace H 2 O on SF 6 overheating decomposition characteristic has been researched very little.…”

Section: Introductionmentioning

confidence: 99%

Study on the influence mechanism of trace H2O on SF6 thermal decomposition characteristic components

Zeng

Tang

Zhang

et al. 2015

IEEE Trans. Dielect. Electr. Insul.

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To explore the influence mechanism of trace H 2 O on SF 6 decomposition characteristics under partial thermal fault and establish the foundation of using SF 6 thermal decomposition principle to diagnose the thermal fault of SF 6 electrical equipment, a series of artificial thermal fault decomposition experiments with different H 2 O concentrations were conducted on the designed SF 6 thermal decomposition experimental system. A trace water injector was used to control the content of trace H 2 O accurately and gas chromatograph, chromatography-mass spectrometry as well as Fourier transform infrared spectroscopy were used to measure decomposed components. Finally, the thermal decomposition characteristic under 340 ℃ was achieved. The analysis results indicate no matter how much H 2 O content is, SF 6 can decomposes into many kinds of decomposition characteristics, such as CO 2 , SOF 2 , SO 2 , SOF 4 , SO 2 F 2 , H 2 S, HF. The concentrations of all these decomposition characteristics increase with the time extended, but change differently with the increase of H 2 O content, because H 2 O plays different role in the formation process of each decomposition characteristic components. The variation of H 2 O content not only affects the production of the decomposition characteristic components, but also makes SO 2 and HF gradually evolved into the main characteristic components of SF 6 thermal decomposition. In addition, the higher the H 2 O content is, the stronger the promoting effect on SO 2 and HF is.

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Analysis of decomposition products of sulfur hexafluoride in negative dc corona with special emphasis on content of H/sub 2/O and O/sub 2/

Cited by 26 publications

References 5 publications

Formation of fluorine for abating sulfur hexafluoride in an atmospheric-pressure plasma environment

Formation of fluorine for abating sulfur hexafluoride in an atmospheric-pressure plasma environment

Production of S<sub>2</sub>F<sub>10</sub>, S<sub>2</sub>OF<sub>10</sub>, and S<sub>2</sub>O<sub>2</sub>F<sub>10</sub> from Spark and Negative-Corona Discharges in SF<sub>6</sub> and SF<sub>6</sub>/O<sub>2</sub> Gas Mixtures

Study on the influence mechanism of trace H<sub>2</sub>O on SF<sub>6</sub> thermal decomposition characteristic components

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