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Surface charge accumulation and suppression on fullerene-filled epoxy-resin insulator under DC voltage.

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Title: Surface charge accumulation and suppression on fullerene-filled epoxy-resin insulator under DC voltage.
Authors: Zhang, Boya, Gao, Wenqiang, Hou, Yicen, Zhang, Guixin
Source: IEEE Transactions on Dielectrics & Electrical Insulation. Oct2018, Vol. 25 Issue 5, p2011-2019. 9p.
Subjects: Surface charges, Epoxy insulators, Fullerene derivatives, High-voltage direct current transmission, Charge carriers
Abstract: Surface charge accumulation on the insulator surface and the resulting flashover voltage reduction are considered the primary factors to hinder the large-scale use of HVDC system, especially the gas-insulated system. In this study, Buckminster-fullerene C60 of different loadings is introduced into epoxy resin for the purpose of restricting the mobility of charge carriers within the material and thus suppressing the charge accumulation on the insulator surface under dc voltage. Experimental results have shown that with the addition of tiny amount of fullerene C60 into epoxy, the conductivity of the composites decreases significantly with the loading and reaches its minimum around 100∼200 ppm, which can be as low as 20% that of neat epoxy. By using the Kelvin-probe method and an advanced inversion algorithm, the surface charge distribution on the fullerene-filled epoxy resin insulators with different filler loadings are obtained. It is observed that the addition of 200 ppm fullerene C60 into epoxy resin can effectively suppress the charge accumulation on the insulator surface. The interfacial polarization model is adopted to interpret the mechanism of surface charge accumulation, which shows that reducing the bulk conductivity of the insulator can effectively suppress the surface charging. This paper provides a potential solution for engineering epoxy based insulators used for the dc power system. [ABSTRACT FROM AUTHOR]
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
An: 132209507
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  Data: Surface charge accumulation and suppression on fullerene-filled epoxy-resin insulator under DC voltage.
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  Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Boya%22">Zhang, Boya</searchLink><br /><searchLink fieldCode="AR" term="%22Gao%2C+Wenqiang%22">Gao, Wenqiang</searchLink><br /><searchLink fieldCode="AR" term="%22Hou%2C+Yicen%22">Hou, Yicen</searchLink><br /><searchLink fieldCode="AR" term="%22Zhang%2C+Guixin%22">Zhang, Guixin</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22Surface+charges%22">Surface charges</searchLink><br /><searchLink fieldCode="DE" term="%22Epoxy+insulators%22">Epoxy insulators</searchLink><br /><searchLink fieldCode="DE" term="%22Fullerene+derivatives%22">Fullerene derivatives</searchLink><br /><searchLink fieldCode="DE" term="%22High-voltage+direct+current+transmission%22">High-voltage direct current transmission</searchLink><br /><searchLink fieldCode="DE" term="%22Charge+carriers%22">Charge carriers</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Surface charge accumulation on the insulator surface and the resulting flashover voltage reduction are considered the primary factors to hinder the large-scale use of HVDC system, especially the gas-insulated system. In this study, Buckminster-fullerene C60 of different loadings is introduced into epoxy resin for the purpose of restricting the mobility of charge carriers within the material and thus suppressing the charge accumulation on the insulator surface under dc voltage. Experimental results have shown that with the addition of tiny amount of fullerene C60 into epoxy, the conductivity of the composites decreases significantly with the loading and reaches its minimum around 100∼200 ppm, which can be as low as 20% that of neat epoxy. By using the Kelvin-probe method and an advanced inversion algorithm, the surface charge distribution on the fullerene-filled epoxy resin insulators with different filler loadings are obtained. It is observed that the addition of 200 ppm fullerene C60 into epoxy resin can effectively suppress the charge accumulation on the insulator surface. The interfacial polarization model is adopted to interpret the mechanism of surface charge accumulation, which shows that reducing the bulk conductivity of the insulator can effectively suppress the surface charging. This paper provides a potential solution for engineering epoxy based insulators used for the dc power system. [ABSTRACT FROM AUTHOR]
– 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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    Identifiers:
      – Type: doi
        Value: 10.1109/TDEI.2018.006969
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      – Code: eng
        Text: English
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        PageCount: 9
        StartPage: 2011
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      – SubjectFull: Surface charges
        Type: general
      – SubjectFull: Epoxy insulators
        Type: general
      – SubjectFull: Fullerene derivatives
        Type: general
      – SubjectFull: High-voltage direct current transmission
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      – SubjectFull: Charge carriers
        Type: general
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      – TitleFull: Surface charge accumulation and suppression on fullerene-filled epoxy-resin insulator under DC voltage.
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            NameFull: Gao, Wenqiang
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              M: 10
              Text: Oct2018
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              Y: 2018
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            – TitleFull: IEEE Transactions on Dielectrics & Electrical Insulation
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