基于风电场实测的风机尾流特征分析

Analysis of Wind Turbine Wake Characteristics Based on Wind Farm Field Measurement

自然来流风由风电机组的上游经过风机叶轮后推动风机叶轮转动的同时产生风机尾流效应。风机尾流效应会减小处于风机尾流区其他机组的发电效率,还会增加下游风机来流风的湍流强度,引起风机的机械疲劳损伤,降低风机的运行稳定性。为研究风机尾流特征,使用便携式激光测风雷达对新疆达坂城地区某风电场单台风机进行风场测试,通过测试数据绘制风机尾流区不同测试点风廓线,并分析得到陆上风电场单台风机不同来流风速下尾流区风速恢复速率,为风电场机组选型及排布优化和电场整体发电量的提升奠定了基础。

The natural flow of wind from the upstream of the wind turbine unit passes through the fan impeller and drives the fan impeller to rotate while generating the fan wake effect.The wind turbine wake effect will reduce the power generation efficiency of other units in the wind turbine wake area,and also increase the turbulence intensity of the downstream wind turbine,causing mechanical fatigue damage to the wind turbine and reducing the operation stability of the wind turbine.In order to study the characteristics of wind turbine wakes,a portable laser wind measurement radar was used to conduct wind field tests on a single wind turbine of a wind farm in Dabancheng,Xinjiang.Based on the test data,the wind profile at different test points in the wake area of the wind turbine was drawn,and the wind speed recovery rate in the wake area of a single wind turbine on land wind farm under different incoming wind speed was obtained by analysis.It lays the foundation for the optimization of wind farm unit selection and arrangement and the overall power generation increase of the farm.