110kV复合横担输电塔电气规划和结构特性研究

STUDY ON ELECTRICAL PLANNING AND STRUCTURAL CHARACTERISTICS OF TRANSMISSION TOWER USING COMPOSITE MATERIALS CROSS ARM

将复合材料运用于输电塔的横担,可有效减少电气间距和横担长度,从而压缩走廊宽度,实现节约用地。本文以某110kV复合横担输电塔为工程背景,进行了塔型电气规划,并建立了有限元模型,获得了其自振特性并与传统角钢塔做了对比。使用基于时域法的风振系数计算,得到了输电塔各高度处的风振系数,并将结果与我国规范的取值进行了对比,结果可为复合塔抗风设计提供参考。

In order to reduce the electrical spacing and the length of cross arm, we study the transmission tower strueture using eomposite materials to aehieve transmission line eorridors eompression and transmission line area reduetion. Taken the llOkV transmission tower with eomposite eross arm as engineering baekground, we earried out the eleetrieal planning, established a preeise finite element model and obtained the vibration eharaeteristies of strueture. Also, we eompared them with the vibration eharaeteristies of traditional angle steel tower. The transmission tower wind vibration eoeffieient of different heights based on dynamie time-integration method has been ealeulated, and the results have been eompared with the value given by the norms of our eountry, whieh ean be used as a referenee for wind resistanee design of eomposite transmission tower.