过去三年新疆大风沙尘分布及电网吐哈线路 大风灾害风险分析

Distribution of Gale Dust in Xinjiang during the Past Three Years and Risk Analysis of Wind Disaster in Tuha Line

采用新疆地区国家级观测站的风速和能见度数据。研究2014—2016年新疆地区大风沙尘分布特征及其相关关系。研究表明,北疆大风多发生在冬季到第二年春季,南疆多发生在春末;北疆沙尘高发时段为3月,南疆为4—6月。大风有利于沙尘天气的形成,但是狂风以上强度的风有利于沙尘的迁移和局地沙尘天气的减弱。电网线路上除了与十三间房毗邻的365号路段大风灾害风险较高外,其他路段大风灾害风险相对较低,可在该区域进行电网后续建设及扩容。

The observational data of wind speed in automatic stations in Xinjiang were used to study the distribution characteristics and correlation of wind with dust in Xinjiang for2014-2016.The results show that the northeasterly gale occurred in the winter and spring in the second year,and the southern Xinjiang occurred in the late spring.The high sand-dust period in northern Xinjiang was in March while that in southern Xinjiang was in April to June.Strong winds are favorable for the formation of sandstorms,but winds above gale intensity are favorable for the migration of sand dust and the weakening of local dust weather.In addition to the power line adjacent to section365is in high wind risk,the risk of wind damage in other sections is relatively low,so that the regions around other sections rather than the365section are suitable for follow-up power line constructions and expansions.