尾流作用下风机振动的控制研究

Vibration Control of Wind Turbines Operating Under Wakes

上游风电机组的扰动效应使风机尾流处风场湍流强度增大,因此,下游风电机组的疲劳荷载显著增大。为了降低下游风电机组的风致响应,利用调谐质量阻尼器与旋转惯性双调谐质量阻尼器,开展尾流作用下的风机结构振动控制研究。采用致动线方法,实现了风机尾流风场仿真,风场数值仿真结果与实验值吻合;依据广义坐标理论,编制陆上风机结构风致响应分析程序,以实现读取任意风场数据并考虑旋转叶片与塔体耦合时变结构的风机整机风致动力响应分析,自编程序计算结果与商业程序基本吻合;采用调谐质量阻尼器与旋转惯性双调谐质量阻尼器对下游风电机组进行振动控制,降低风电机组风振响应,减小疲劳荷载。

Due to the wake effect,the turbulence intensity of wind turbine wake flow increase,which resulting in the increase of fatigue load of downstream wind turbine.To decrease the wind-induced response of the downstream wind turbine,the tuned mass damper and the rotating inertia double tuned mass damper are used to control the vibration of downstream wind turbine.Firstly,the actuator line model is used to simulate the wake flow,and the numerical result agree with the experimental data.Secondly,based on the generalized coordinate theory,the wind-induced response analysis program is compiled,which can read arbitrary wind field and consider the coupling structure system of the rotating blade and the tower.and the result calculated by this program correspond to it by commercial program.Finally,the tuned mass damper and the rotating inertia double tuned mass damper are used to control the vibration of downstream wind turbine.Under the control of damper,the response of the downstream wind turbine decrease,and the equivalent fatigue load reduced.