Using a triangular ice sample, the characteristics of the DC arc appearing on ice surfaces was investigated. Based on the results obtained, a model for predicting the 50% flashover voltage of ice-covered insulators energised with DC was presented. The model takes into account the ice surface conductivity, voltage polarity, and arc root radius. Moreover, to validate the model, the 50% flashover voltage of a short string of five IEEE standard insulators covered with artificial ice under both DC– and DC+ was measured. There was an excellent concordance between the experimental results and those calculated from the mathematical model.
No takes yet. Share an insight, caveat, or question.
Farzaneh et al. (2000) studied this question.