基于氧同位素示踪法的电晕放电中H2O和O2对SF6分解气体形成的影响

doi:10.19595/j.cnki.1000-6753.tces.180031

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Abstract

SF₆ gas can decompose into lower fluorides of sulfur under electrical discharge, and then these lower fluorides will oxidize in the presence of water vapor and oxygen, resulting in the formation of decomposition by-products such as SO₂F₂, SOF₂ and SO₂. SO₂F₂ is one of the main and stable decomposition by-products of SF₆ gas. Since trace H₂O and O₂ can participate in SF₆ decomposition process directly, the formation of SO₂F₂ is closely related to H₂O and O₂. In this paper, the effects of H₂O and O₂ on SF₆ decomposition characteristics under corona discharge have been investigated based on oxygen isotope tracer method. By injecting different concentrations of H₂¹⁸O and ¹⁸O₂, a series of corona discharge experiments are carried out. Then the concentration ratios of the S¹⁶O₂F₂, S¹⁸O¹⁶OF₂ and S¹⁸O₂F₂ are analyzed respectively, under different concentrations of H₂¹⁸O and the ratios of ¹⁸O₂ to ¹⁶O₂. Finally, the formation mechanism of SO₂F₂ is discussed.

Key words： SF₆ corona discharge SF₆ decomposition by-products oxygen isotope tracer method

Received: 11 January 2018 Published: 30 October 2018

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TM835

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	Zhao Mingyue
	Lin Tao
	Yan Xianglian
	Han Dong
	Zhang Guoqiang

Cite this article:

Zhao Mingyue,Lin Tao,Yan Xianglian等. Influence of Trace H₂O and O₂ on SF₆ Decomposition Characteristics under Corona Discharge Based on Oxygen Isotope Tracer[J]. Transactions of China Electrotechnical Society, 2018, 33(20): 4722-4728.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.180031 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I20/4722

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