Research on Ice Accumulation of Transmission Lines in Xinjiang

The extreme weather conditions in Northwest China, especially in Xinjiang, are relatively complex and easily have an adverse impact on power grid safety, especially on high-voltage transmission lines, among which the impact of icing is the most prominent. This study analyzed the five forms of wire icing: rime, wet snow, mixed icing and frost. It was concluded that the main types of wire icing in Xinjiang were rime, and the extreme value appears to be highest in March. Variation characteristics of wire icing: the maximum thickness of wire icing in Xinjiang was generally between 21–66 mm, mostly between 30–45 mm. The distribution characteristics of rime and snow songs in Xinjiang were that the mountain area was more than the plain, and the wet area was more than the dry area. According to the extreme value I-type distribution, the recurrence level of the maximum icing thickness at 30 years, 50 years and 100 years was estimated, the ice area was divided, and the data were corrected by altitude, line diameter, special terrain and other parameters.