Assement on wind environment and steel tower bearing capacity of outgoing line of wind power in Arctic Pole

There are rich wind power resources in the Arctic regions. However, the Arctic regions are characterized by high cold, high humidity and strong wind environments, which have brought about new challenges to the construction of transmission line and the development of wind power. In this Paper, for the area of site selection of wind farm in the planning, the data of annual average wind speed, temperature, atmospheric pressure and humidity of 38 international exchange stations along the coasts of Kara Sea and Laptev Sea were collected and analyzed. Based on WERAS/CMA model analysis system, the basic wind speed, the mean wind profile and turbulence intensity during different reoccurrence periods in this region are obtained. A certain long-span strong wind resistant tower is selected as the research object. Two factors which will increase the wind load of transmission line are taken into consideration in the meanwhile, one is the air density increase due to the high cold, and the other one is the influence caused by icing of tower member and conductor. Then, the bearing capacity state of the tower is checked. The research methods and results in this paper may provide the design basis for the construction of outgoing line of wind power in the Arctic regions.

北极地区拥有丰富的风力资源。然而，北极地区具有高寒、高湿和强风的环境特点，这给输电线路建设和风电开发带来了新的挑战。本文针对规划中风电场选址区域，收集并分析了喀拉海和拉普捷夫海沿岸38个国际交换站的年平均风速、温度、大气压和湿度数据。基于WERAS/CMA模型分析系统，得出了该地区不同重现期的基本风速、平均风廓线和湍流强度。选取某一大跨度抗强风铁塔作为研究对象，同时考虑了两个会增加输电线路风荷载的因素，一个是高寒导致的空气密度增加，另一个是铁塔构件和导线结冰所造成的影响，然后对铁塔的承载能力状态进行了验算。本文的研究方法和结果可为北极地区风电外送线路建设提供设计依据。