基于偏航尾流模型的风场尾流主动控制

Active Control of Wind Field Wake Based on Yaw Wake Model

风场尾流效应不但会造成发电量损失,也会引起湍流增加进而对机组疲劳/极限寿命造成很大的影响。结合现场风场案例,本文在传统的尾流计算Jensen模型基础上,引入偏航对尾流扩散、强度和范围的影响,建立了新的偏航尾流模型,大幅度提高尾流预测的精度。最后,通过主动尾流控制,可以减小尾流影响,提升风场发电能力2-5%。

The wind field wake effects not only cause power generation loss,but also increase turbulence which has significant influence on fatigue or limit load of wind turbine.In this paper,combines practical wind field cases,based on traditional Jensen wake model,and introduced the effects of yaw on wake expansion,intensity and scope,the new yaw wake model is established,which can increase the accuracy of wake prediction.Finally,the active wake control is used to reduce the wake influences,in order to promote the power generation capacity of wind filed up to 2-5%.