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风场上游风力机的尾迹不仅导致下游风力机功率显著降低,且易引起疲劳载荷等结构问题。故通过CFD模拟两台5 MW风力机串列布置的风场,在考虑大气边界层环境的情况下,使用不同控制方法改变尾迹流向,使其偏离下游风力机风轮中心位置以提高风场总输出功率。结果表明:对上游风力机使用基于偏航和仰角的控制策略时尾迹偏移效果显著,尽管上游风力机的功率有所降低,但下游风力机输出功率增加,使得风场输出总功率得以提高;锥角控制的效果相反,增大锥角时尾迹并未产生明显的偏移而尾迹范围却扩大,导致风场总输出功率降低。
The wake of the wind turbine upstream of the wind farm not only causes the power of the downstream wind turbine to decrease significantly, but also easily causes structural problems such as fatigue load. So CFD simulates the wind field of two 5MW wind turbines arranged in series. When considering the atmospheric boundary layer environment, different control methods are used to change the flow direction of the wake so as to deviate from the center position of the wind turbine of the downstream wind turbine so as to increase the total wind field Output Power. The results show that the effect of wake deflection is significant when using the control strategy based on yaw and elevation angles for the upstream wind turbine. Although the power of the upstream wind turbine is reduced, the output power of the downstream wind turbine increases and the total output power of the wind field is increased. Cone angle control, on the contrary, increases the taper angle when the wake does not produce a significant offset and the wake range is expanded, leading to reduced total wind power output.