高原山地风电场脉动风特性实测研究
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摘要
文章基于四川省高原山地风电场实测风速数据,对平均风速与风向、湍流强度、阵风因子、湍流积分尺度等脉动风特性进行了研究分析。研究结果表明:当平均风速较低时,随着风速的增大,湍流强度和阵风因子均呈现出明显的减小趋势,而当风速超过临界值时,减小趋势逐渐平缓,两者的临界风速分别为8 m/s和10m/s;随着湍流强度的增大,阵风因子呈现增大的趋势,且随实测高度增加两者相关性更好;随着平均风速的增大,湍流积分尺度呈现增大的趋势,实测数据计算得到的30 m和80 m高度层顺风方向湍流积分尺度分别为114.8 m和168.7 m,更为接近日本风载荷规范计算结果。
Based on field measured data in plateau mountain wind farm,the characteristics of wind speed, wind direction, turbulence intensity, gust factor, gust factor, turbulence integral scale are analyzed in detail. The results show that turbulence intensity and gust factor first present a significant decreasing trend with the increase of wind speed, and then the decreasing trend gradually becomes gentle when the wind speed exceeds 8 m/s and 10 m/s, respectively. With the increase of turbulence intensity, the gush factor tends to increase, and the correlation is better with the increase of measured height. The turbulence integral scale increases with the increase of average wind speed. The calculated turbulent integral scales of 30 m and 80 m altitudes in the measured data are respectively 114.8 m and 168.7 m, which are closer to the calculated results of the Japanese wind load specification.
Based on field measured data in plateau mountain wind farm,the characteristics of wind speed, wind direction, turbulence intensity, gust factor, gust factor, turbulence integral scale are analyzed in detail. The results show that turbulence intensity and gust factor first present a significant decreasing trend with the increase of wind speed, and then the decreasing trend gradually becomes gentle when the wind speed exceeds 8 m/s and 10 m/s, respectively. With the increase of turbulence intensity, the gush factor tends to increase, and the correlation is better with the increase of measured height. The turbulence integral scale increases with the increase of average wind speed. The calculated turbulent integral scales of 30 m and 80 m altitudes in the measured data are respectively 114.8 m and 168.7 m, which are closer to the calculated results of the Japanese wind load specification.
引文
[1]钟滔,任腊春.四川省山地风电场风电机组选型要点分析[J].四川水力发电,2014,33(4):89-91.
[2] Shiau B S.Velocity spectra and turbulence statistics at the northeastern coast of Taiwan under high-wind condition[J].Journal of Wind Engineering and Industrial Aerodynamics,2000,88(2/3):139-151.
[3] Yim J Z,Chou C R.A study of the characteristic structures of strong wind[J].Atmospheric Research,2001,57(3):151-170.
[4]李正农,吴卫祥,王志峰.北京郊外近地面风场特性实测研究[J].建筑结构学报,2013,34(9):82-90.
[5]顾明,匡军,全涌,等.上海环球金融中心大楼顶部风速实测数据分析[J].振动与冲击,2009,28(12):114-118,122.
[6]胡尚瑜,宋丽莉,李秋胜.近地边界层台风观测及湍流特征参数分析[J].建筑结构学报,2011,32(4):1-8.
[7] GB 50009-2012,建筑结构荷载规范[S].
[2] Shiau B S.Velocity spectra and turbulence statistics at the northeastern coast of Taiwan under high-wind condition[J].Journal of Wind Engineering and Industrial Aerodynamics,2000,88(2/3):139-151.
[3] Yim J Z,Chou C R.A study of the characteristic structures of strong wind[J].Atmospheric Research,2001,57(3):151-170.
[4]李正农,吴卫祥,王志峰.北京郊外近地面风场特性实测研究[J].建筑结构学报,2013,34(9):82-90.
[5]顾明,匡军,全涌,等.上海环球金融中心大楼顶部风速实测数据分析[J].振动与冲击,2009,28(12):114-118,122.
[6]胡尚瑜,宋丽莉,李秋胜.近地边界层台风观测及湍流特征参数分析[J].建筑结构学报,2011,32(4):1-8.
[7] GB 50009-2012,建筑结构荷载规范[S].