张北柔直输电线路走廊气候特征分析

Analysis of Climatic Characteristics of Zhangbei Flexible HVDC Transmission Line Corridor

基于ERA-interim 1980~2017年的格点数据及气象站点气象要素数据,分析张北柔直输电线路走廊的气候特征,发现走廊区域四季温度从北向南依次升高,最低值主要出现在沽源段;平均年降水量分布不均;四季风速从西北向东南依次减小,最大风速主要出现在康保站附近。采用极值I型分析得到柔直沿线极值重现,康保等地气温较低,最低温在-30℃以下;年降水量极大值主要出现在丰宁,极小值出现在康保;大风日数极值最大值主要出现在尚义。

Based on ERA-interim grid data from 1980 to 2017 and meteorological element data of meteorological stations,the climatic characteristics of the Zhangbei flexible HVDC transmission line corridor were analyzed.It was found that the temperature in the corridor increases from north to south,and the lowest value mainly occurs in Guyuan section,the average annual precipitation was unevenly distributed;the wind speed in four seasons decreases from northwest to Southeast,and the maximum wind speed mainly appears near Kangbao station.By using extreme value I type analysis,it was found that the extreme value reappears along the Rouzhi line.The gas temperature in Kangbao and other places was low,and the lowest temperature was below -30℃.The maximum value of annual precipitation mainly occurred in Fengning,and the minimum value appeared in Kangbao;the maximum value of the extreme value of gale days mainly appeared in Shangyi.