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Discharge characteristics of CF3I/N2 mixtures under lightning impulse and alternating voltage.

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Title: Discharge characteristics of CF3I/N2 mixtures under lightning impulse and alternating voltage.
Authors: Zhao, Su1, Xiao, Dengming1, Zhang, Hui1, Deng, Yunkun2
Source: IEEE Transactions on Dielectrics & Electrical Insulation. Oct2017, Vol. 24 Issue 5, p2731-2737. 7p.
Subjects: Imperative programming, Computer programming, Chemical decomposition, Scission (Chemistry), Electric fields
Abstract: As the greenhouse effect of SF6 gas, the research on seeking alternative insulating gas to SF6 has become an imperative case. CF3I and its mixtures have been considered as the most promising insulating gas to replace SF6 gas. In this paper, the discharge characteristics of gas gap and insulator in CF3I/N2 gas mixtures under lightning impulse and alternating voltage were investigated. The effect of voltage, pressure as well as decomposition product after flashover were studied. Experimental results showed that in inhomogeneous electric field the breakdown voltages of CF3I/N2 with 30% CF3I gas is lower than SF6/N2 mixtures with 20% SF6. However, the flashover voltage of insulator in CF3I/N2 is higher than that in SF6/N2 mixtures. When compared to CF3I/N2 itself, the 50% breakdown voltage under positive lightning impulse were lower than that under negative lightning impulse. The CF3I/N2 gas mixtures with insulator also had polarity effect and appear polar reversal phenomenon. Under lightning impulse, there is no decomposition product on the surface of insulator after flashover but under alternating voltage, obvious iodine was produced on the surface of insulator. [ABSTRACT FROM PUBLISHER]
Copyright of IEEE Transactions on Dielectrics & Electrical Insulation is the property of IEEE and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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  Data: Discharge characteristics of CF3I/N2 mixtures under lightning impulse and alternating voltage.
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  Data: <searchLink fieldCode="AR" term="%22Zhao%2C+Su%22">Zhao, Su</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Xiao%2C+Dengming%22">Xiao, Dengming</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Zhang%2C+Hui%22">Zhang, Hui</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Deng%2C+Yunkun%22">Deng, Yunkun</searchLink><relatesTo>2</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22IEEE+Transactions+on+Dielectrics+%26+Electrical+Insulation%22">IEEE Transactions on Dielectrics & Electrical Insulation</searchLink>. Oct2017, Vol. 24 Issue 5, p2731-2737. 7p.
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  Data: <searchLink fieldCode="DE" term="%22Imperative+programming%22">Imperative programming</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+programming%22">Computer programming</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+decomposition%22">Chemical decomposition</searchLink><br /><searchLink fieldCode="DE" term="%22Scission+%28Chemistry%29%22">Scission (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+fields%22">Electric fields</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: As the greenhouse effect of SF6 gas, the research on seeking alternative insulating gas to SF6 has become an imperative case. CF3I and its mixtures have been considered as the most promising insulating gas to replace SF6 gas. In this paper, the discharge characteristics of gas gap and insulator in CF3I/N2 gas mixtures under lightning impulse and alternating voltage were investigated. The effect of voltage, pressure as well as decomposition product after flashover were studied. Experimental results showed that in inhomogeneous electric field the breakdown voltages of CF3I/N2 with 30% CF3I gas is lower than SF6/N2 mixtures with 20% SF6. However, the flashover voltage of insulator in CF3I/N2 is higher than that in SF6/N2 mixtures. When compared to CF3I/N2 itself, the 50% breakdown voltage under positive lightning impulse were lower than that under negative lightning impulse. The CF3I/N2 gas mixtures with insulator also had polarity effect and appear polar reversal phenomenon. Under lightning impulse, there is no decomposition product on the surface of insulator after flashover but under alternating voltage, obvious iodine was produced on the surface of insulator. [ABSTRACT FROM PUBLISHER]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of IEEE Transactions on Dielectrics & Electrical Insulation is the property of IEEE and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1109/TDEI.2017.006521
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      – Code: eng
        Text: English
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        PageCount: 7
        StartPage: 2731
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      – SubjectFull: Imperative programming
        Type: general
      – SubjectFull: Computer programming
        Type: general
      – SubjectFull: Chemical decomposition
        Type: general
      – SubjectFull: Scission (Chemistry)
        Type: general
      – SubjectFull: Electric fields
        Type: general
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      – TitleFull: Discharge characteristics of CF3I/N2 mixtures under lightning impulse and alternating voltage.
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            NameFull: Zhao, Su
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            NameFull: Xiao, Dengming
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            NameFull: Zhang, Hui
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            NameFull: Deng, Yunkun
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            – D: 01
              M: 10
              Text: Oct2017
              Type: published
              Y: 2017
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            – TitleFull: IEEE Transactions on Dielectrics & Electrical Insulation
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