高电压技术
高電壓技術
고전압기술
HIGH VOLTAGE ENGINEERING
2009年
6期
1284-1293
,共10页
I. Ndiaye%M. Farzaneh%K. D. Srivastava
I. Ndiaye%M. Farzaneh%K. D. Srivastava
I. Ndiaye%M. Farzaneh%K. D. Srivastava
atmospheric icing%ice-covered insulators%ice surface discharge%positive streamer development%streamer propagation field%streamer stability field
The electric field required for stable propagation of a positive streamer along an ice surface was investigated by measuring the currents associated with the streamer discharge. The influence of the surface properties, namely the existence of a water film on the ice surface and surface contamination, was analyzed. Results showed that in the pres-ence of an ice surface, except in case of low conductive surface, streamers propagate stably with an external field low-er than that generally measured for propagation in air alone (approximately 5 kV/cm). For higher contamination lev2 els, the stability field was found to be slightly influenced by the temperature, while for lower contamination levels, it decreased significantly with an increase in temperature.
