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Characteristics of Creeping Discharges Along Epoxy Surface in Fluoronitrile/CO2 Gas Mixture Under Lightning Impulse

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Proceedings of the 21st International Symposium on High Voltage Engineering (ISH 2019)

Part of the book series: Lecture Notes in Electrical Engineering ((LNEE,volume 599))

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Abstract

This paper deals with creeping discharges propagating over solid insulator samples in presence of a fluoronitrile mixture consisting of 10% of fluoronitrile and 90% of CO2, under positive and negative standard lightning impulse voltages, in point-plane geometry. The solid samples used are disks made of filled epoxy resin used for real GIS insulators. The experimental results are compared with those obtained with SF6 at pressure ranging 0.1 to 0.3 MPa, while the pressure of fluoronitrile mixture is chosen to match an equivalent dielectric strength of SF6. Different characteristic parameters are investigated namely the maximum length of creeping discharges versus the gas/mixture pressure and voltage polarity. In SF6, two regimes of discharges that depend on the voltage polarity are evidenced. Under positive impulse, the mixture presents similar properties as SF6. However, under negative polarity the maximum discharge length in SF6 is much longer than in the fluoronitrile mixture.

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Acknowledgments

This work was supported by a grant of the French National Research Agency (ANR) as part of the “Investissements d’Avenir” Program (ANE-ITE- 002-01).

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Authors and Affiliations

  1. SuperGrid Institute, 23 rue Cyprian, 69611, Villeurbanne, France

    A. Perez, A. Beroual, A. Girodet & F. Jacquier

  2. University of Lyon, Ecole Centrale de Lyon, Ampère, 69134, Ecully, France

    A. Perez & A. Beroual

Authors
  1. A. Perez
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  2. A. Beroual
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  3. A. Girodet
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  4. F. Jacquier
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Correspondence to A. Perez .

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Editors and Affiliations

  1. High Voltage Laboratory, Budapest University of Technology and Economics, Budapest, Hungary

    Bálint Németh

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Perez, A., Beroual, A., Girodet, A., Jacquier, F. (2020). Characteristics of Creeping Discharges Along Epoxy Surface in Fluoronitrile/CO2 Gas Mixture Under Lightning Impulse. In: Németh, B. (eds) Proceedings of the 21st International Symposium on High Voltage Engineering. ISH 2019. Lecture Notes in Electrical Engineering, vol 599. Springer, Cham. https://doi.org/10.1007/978-3-030-31680-8_24

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  • DOI: https://doi.org/10.1007/978-3-030-31680-8_24

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-31679-2

  • Online ISBN: 978-3-030-31680-8

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