摘要
以3.6 MW水平轴风力机为研究对象,采用外场实验的方法,利用遥感测试技术研究大气边界层湍流尺度对大型水平轴风力机功率波动的影响。结果表明:在风轮前方,风轮半径远处风速较1.5倍风轮直径处下降约5%,而轮毂高度处湍流度却增加近1.5倍;同时,基于数据采集与监控(SCADA)系统数据的风力机输出功率的功率谱特性表明,风力机输出功率的波动可分为3个区域,分别为大尺度气象现象影响区、湍流特征与功率波动耦合区和小尺度湍流脉动影响区,其中湍流特征与功率波动耦合区的功率谱出现-2及-5/3-4的斜率,小尺度湍流脉动影响区域附近出现3个由风轮旋转引起的波峰,且0.064 Hz前后出现Φp/Φu~f-1和Φp/Φu~f-4 2种幂率关系。
In this paper,taking a 3.6 MW horizontal axis wind turbine as the research object,adopting the field experimental method,and using remote sensing test technology,the influence of turbulence integral scale of atmospheric boundary layer on horizontal axis wind turbine power fluctuation is studied.The results show that in the front of the rotor,the wind speed at the distance of the rotor radius is about 5% lower than that at 1.5 times the rotor diameter,while the turbulence increases by nearly 1.5 times at the height of the hub.At the same time,the power spectrum characteristics of wind turbine output power based on SC ADA data exhibited three distinctive regions,which are large-scale meteorological phenomenon affected region,turbulence characteristics and power fluctuation coupling region and affecting region of small-scale turbulent pulsation,respectively.The power spectrum of the turbulence characteristic and the power fluctuation coupling region exhibits a slope of-2 and-5/3-4,and three peaks caused by the rotation of the rotor appear near the affecting region of small-scale turbulent pulsation.Two power-law relations of Φp/Φu-f-1 and Φp/Φu-f-4 appear respectively when the frequency is less or greater than 0.064 Hz.
作者
杨从新
王印
李寿图
杨浩南
Yang Conxin;Wang Yin;Li Shoutu;Yang Haonan(School of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Gansu Wind Turbine Engineering Technology Research Center,Lanzhou 730050,China;Key Laboratory of Fluid Machinery and Systems,Gansu Province,Lanzhou 730050,China)
出处
《太阳能学报》
CSCD
北大核心
2021年第8期408-413,共6页
Acta Energiae Solaris Sinica
基金
国家重点基础研究发展(973)计划(2014CB046201)
国家自然科学基金(11262011)。
