关键词: 悬垂绝缘子串, 风偏, 基本风速, 风压不均匀系数, 风压高度变化系数, 风荷载

Abstract:

Through comparing the differences of parameter selecting in the basic wind speed, the uneven coefficient of wind pressure and the height variation coefficient of wind pressure at home and abroad, some conclusions are drawn in the design of suspension insulator strings. The results show that: in the aspect of basic wind speed choosing, there are great differences either in the wind speed conversion of observation density and time or in the return period between China and overseas countries; the selecting and the conversion method of wind pressure’s uneven coefficient have significant influence on conductor’s wind load; the different types of ground roughness have great influence on the values of height variation coefficient of wind presssure, which has not been defined explicitly in the transition area in domestic transmission line standard. So wind parameters should be observed on site for different terrains and heights, and these parameters can be optimized and improved through the accumulation of long-term observation data.

Key words: suspension insulator string, windage, basic wind speed, uneven coefficient of wind pressure, height variation coefficient of wind presssure, wind load