• DocumentCode
    1356891
  • Title

    Theory of positive onset corona pulses in SF6

  • Author

    Morrow, R.

  • Author_Institution
    CSIRO, Lindfield, NSW, Australia
  • Volume
    26
  • Issue
    3
  • fYear
    1991
  • fDate
    6/1/1991 12:00:00 AM
  • Firstpage
    398
  • Lastpage
    404
  • Abstract
    The mechanism of formation of positive corona onset pulses in SF 6 at 100 kPa is examined. A constant positive voltage of 50 kV is applied to an 0.5-cm diameter sphere located 6.5 cm from a grounded plane. The calculated current pulse has a width at half maximum amplitude of ~0.3 ns, thus explaining the origin of subnanosecond current pulses in SF6. During the current pulse a streamer moves out into the gap along a 100-μm channel, with the electric field in the streamer trail E>E*, where E* is the critical field for which ionization equals attachment
  • Keywords
    corona; electric breakdown of gases; gaseous insulation; sulphur compounds; 50 kV; 700 kPa; SF6; critical field; current pulse; ionization; positive onset corona pulses; streamer; streamer trail; subnanosecond current pulses; Anodes; Corona; Electrons; Gas insulation; Ionization; Physics; Poisson equations; Space vector pulse width modulation; Spontaneous emission; Voltage;
  • fLanguage
    English
  • Journal_Title
    Electrical Insulation, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9367
  • Type

    jour

  • DOI
    10.1109/14.85110
  • Filename
    85110
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1356891