垂直错列布局风力机群尾流特征研究

STUDY ON WAKE CHARACTERISTICS OF VERTICALLY STAGGERED WIND TURBINES GROUP

风力机尾流对风电场的输出功率有着重要影响,为深入研究增设小风力机对风电场整体出力的影响,采用OpenFOAM模拟2个大风力机和2个大风力机之间横向布置的3个小风力机的组合,并以小风力机与下游大风力机之间距离不同的4种工况和其中1种工况下小风力机高度不同为研究对象。该布局在2个大风力机之间增加3个小风力机,每排小风力机与下游大风力机的距离不同。结果表明:经距离不同和高度不同的计算对比,当小风力机高度设置为37 m时,随着与上游大风力机距离的增大,下游大风力机功率逐渐增加;当小风力机距离下游大风力机位置固定,增加小风力机轮毂高度则使得下游大风力机功率降低。

The wind turbine wake has an important impact on the output power of wind farms.In order to study the impact of adding small wind turbines on the overall output of wind farms,OpenFOAM was used to simulate the combination of two large wind turbines and three small wind turbines arranged horizontally between two large wind turbines,and four operating conditions with different distances between small wind turbines and large wind turbines downstream and one of the operating conditions with different heights of small wind turbines as the study object.The layout adds three small wind turbines between two large wind turbines,and each row of small wind turbines has a different distance from the large wind turbines downstream.The results show that when the small wind turbines are set at a height of 37 m,the power of the downstream large wind turbine increases gradually with the increase of the distance from the upstream large wind turbine.When the distance of the small wind turbine from the downstream large wind turbine is fixed,increasing the hub height of the small wind turbine makes the power of the downstream large wind turbine decrease.