摘要: |
利用衡阳9站1970~2016年测风数据,通过气候倾向率分析风速年、年代际变化,MK检验风速突变年份,运用有效小时数、有效风能密度评估各区域风能蕴藏量,其结论如下:衡阳风速总体呈下降趋势,衡山减少最明显,风速减少极显著区域未出现突变;低海拔区风速集中在0~3.4m/s(85.8%),1991~2016年风频两极分化,低速及高速区增多,中间出现断层。南岳山风速范围广,2005~2016年强风频区有缺失,主风频在3~5区间;2010年全面采用高灵敏度自动测风仪,低海拔区静风迅速减少;按照有效风能密度标准,南岳山风能丰富,低海拔区未达到可利用标准。 |
关键词: 衡阳市;风向风速 风能密度 MK突变 |
DOI: |
投稿时间:2018-03-13修订日期:2018-05-04 |
基金项目: |
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ResearchSonStheSwindSvariationSandStheSwindSenergySresourceSreservesSassessmentSinSHengyangScity |
chen tao,Yuan Zhishen,Li Chao,e Weiwei,Luo Xiguang |
(Hengyang Meteorological Office of Hunan Province, Hengyang;Climate Center of Hunan Province , Changsha) |
Abstract: |
#$NL:Base on the hours wind direction and wind speed data of 9 artifical meteorological stations from 1970 to 2016, climatic trend rate was employed to analysis the annual and annual change trend of wind speed, Mann-Kendall test was employed to detect wind speed mutation years, wind energy resource reserves was assessed by hours numbers of valid wind speed and effective wind energy density in each area. The results show that the wind speed is decreased in Hengyang city, especially in Hengshan, the decrease trend is not mutated by the confidence level of 99.9%. The main wind speed of low-altitude area is 0-3.4m/s (85.8%), the frequency of wind speed is polarized from 1991 to 2016, low-speed and high-speed area is increased, and there was a fault in the middle.The wind speed range is wider in Nanyue mountain, the frequency of wind speed from 3 to 5 m/s is greater than 10%, and there was a lack of strong wind frequency from 2005 to 2016. Because of the automatic wind measuring instrument has a high sensitivity, the static wind has greatly decreased and the average wind speed has increased after the application of the automatic wind measuring instrument in 2010.Accoding to the effective wind energy density standard, Nanyue mountain is a rich area of wind energy, and the low elevation area is not up to the standard. |
Key words: Hengyang city; wind direction and wind speed; wind energy density; Mann-Kendall test |