Ice Treeing under DC and AC Electric Fields at Different Intensities of Accretion,

Abstract

Atmospheric ice is accreted on an aluminium conductor of 3.15cm diameter at different intensities of accretion. High voltage (ac and dc) is applied to the conductor to produce an electric field at the surface of the conductor in the same range as that existing on actual power lines. The visual aspect of ice accretion shows the formation of ice treeing with thick branches under ac and dc positive fields. The ice trees are small and their branches are very thin under negative field above -10kV/cm. From the study of corona pulses it is shown that corona streamers are responsible for the ice treeing. The results obtained show that for low and medium precipitation intensities, the amount of ice accreted under dc negative field above -10kV/cm is negligeable. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1983
Accession Number
ADP001681

Entities

People

  • Du D. Nguyen
  • Jean-louis Laforte
  • Luan C. Phan

Organizations

  • UniversitĂ© du QuĂ©bec

Tags

DTIC Thesaurus Topics

  • Aluminum
  • Diameters
  • Electric Fields
  • Electricity
  • Electromagnetic Fields
  • High Voltage
  • Intensity
  • Lepidoptera
  • New Hampshire
  • Precipitation
  • Voltage
  • Workshops

Readers

  • Electrical Engineering
  • Geotechnical Engineering.