Analysis about the Wind Field Characteristics of the Light Wind Power Generation in Huzhou

采用中尺度自动站资料，对湖州2014~2023年0~2 m/s、2~6 m/s、6~10 m/s、10~12 m/s区段的风速绘制了比率分布图，并重点针对2~6 m/s的微风段分析风向频率及年际、月际和季节、日变化，结果表明：(1) 微风主要集中在0~2 m/s和2~6 m/s区段，湖州东部、北部平原和太湖沿岸及个别高山区比率超过50%，这些区域微风资源相对比较丰富。(2) 2~6 m/s微风主风向频率按不同类型站点分布为：城市站湖州、安吉ESE，德清、南浔E，长兴E、ENE，湖岸站SE到SSE，高山站云上草原SSW，莫干山E。(3) 2~6 m/s微风占比近10年呈缓慢下降趋势；3~5月和8月风力相对较大；春季风力较大，夏季次之，秋、冬季最小；日变化总体均呈单峰型，中午到傍晚微风风力较大，峰值一般出现在14时、15时，而夜间微风风力较小，谷值一般出现在02~06时。The mesoscale automatic stations data were used to draw ratio distribution maps for wind speeds in the 0~2 m/s, 2~6 m/s, 6~10 m/s, and 10~12 m/s sections in Huzhou from 2014 to 2023. The wind direction frequency and interannual, monthly, seasonal, and diurnal variations in the 2~6 m/s light wind section were analyzed in detail. The results showed that: (1) Light wind mainly concentrates in the 0~2 m/s and 2~6 m/s sections. The ratios in the eastern part of Huzhou, the northern plains, the Taihu Lake shore, and some high mountainous areas exceed 50%, and these areas have relatively abundant light wind resources. (2) The frequency of the main wind direction in the 2~6 m/s light wind range varies according to different types of stations: in the urban stations Huzhou and Anji are ESE, Deqing and Nanxun are E, Changxing is E and ENE, the lake shore station is SE to SSE, in the high mountain stations Skyland is SSW, and Mogan Mountain is E. (3) The proportion of 2~6 m/s light wind has shown a slow downward trend in the past 10 years; the wind speed is relatively large from March to May and August; the wind speed is larger in spring, followed by summer, and the smallest in autumn and winter; the diurnal variation is generally single-peaked, with the wind speed being larger from noon to evening, the peak generally occurring at 14:00 and 15:00, and the wind speed being smaller at night, with the trough generally occurring from 02:00 to 06:00.