ABSTRACT
Four separate Fiber Reinforced Plastic (FRP) hot-stick flashover incidents occurred in Canada under steady-state system conditions at the peak of the voltage negative half-cycle during cold and freezing conditions, many tests were carried out at Manitoba Hydro, Hydro-Quebec Research Institute, Kinectrics and CIGELE to reproduce the flashovers. In February and December 2012 and in common with Manitoba Hydro, SaskPower experienced two flashovers of "clean" FRP hot sticks during cold weather live-line work on a 230-kVac line under steady-state condition in a neighboring province, Saskatchewan. On 27 October 1997, a FRP hot stick flashover occurred under steady-state system condition at the peak of the negative half-cycle of voltage waveform during live-line working for the purpose of replacing V-string insulators. The coupled Computational Fluid Dynamics and Heat Transfer model for an ice-hot stick was elaborated in could well explain why the flow of partial discharge current could be sufficient to raise the temperature of an iced pollution layer just below freezing.
