Impact of Wake Interference Suppression Strategies on the Aerodynamic Performance of Twin Wind Turbines

[Objective] The paper takes the NREL-5MW wind turbine as the research object, adopts the control strategy based on the single and combination of the yaw angle(θ) of the upstream wind turbine and the tower height(ΔH) difference of the downstream wind turbine as well as the lateral spacing(Δy), researches the complex wake interference effect between the two wind turbines. [Method] Numerically simulated the part of the wake interfering phenomenon between the two wind turbines, analyzed the aerodynamic power of the two wind turbines, the average speed of the wake flow, and the effect of the wake interference to improve the power generation of the whole wind power field efficiency of the whole wind farm. [Result] The results show that the overall power of the wind turbine and its enhancement ratio are maximized when the combined strategy is implemented, especially when adjusting the lateral spacing Δy=4D or Δy=8D on the basis of θ=20°. [Conclusion] By changing the yaw angle of the upstream wind turbine or the upstream and downstream wind turbines staggered arrangement and other wake effect inhibition strategies, the power output of the upstream wind turbine is reduced and the effect of the wake of the upstream wind turbine is improved, which can improve the aerodynamic power output of the downstream wind turbine and the overall power generation of the wind turbine, and improve the power generation efficiency of the wind turbine in a relatively large scale, and provide a certain degree of numerical simulation for the optimization of the arrangement of large-scale wind farms support.