基于TMD的漂浮式风力机振动控制

VIBRATION CONTROL OF FLOATING WIND TURBINES BASED ON TMD

针对漂浮式风力机的振动控制进行研究,探讨将调谐质量阻尼器(TMD)同时安装于风力机的机舱和平台中时对风力机关键部位位移和载荷的影响。首先,建立风力机的多体动力学模型,并对建模准确性进行验证。其次,根据拉格朗日方程搭建四自由度的动力学模型,利用Levenberg-Marquardt(LM)法对其中的未知参数进行估计。然后以塔顶纵向位移标准偏差最小为控制目标,采用人工鱼群算法同时对TMD的质量、阻尼以及刚度参数进行优化。最后,在5种工况下,分别对风力机模型进行仿真分析,仿真结果表明,在风浪同向和不同向情况下,TMD对塔顶前后位移、塔基前后弯矩、平台纵摇角均有明显的抑制效果。

In this paper,the vibration control of floating wind turbine is studied,and the influence of TMD installed in the nacelle and platform simultaneously on the displacement and load of the key parts of the wind turbine is discussed. Firstly,the multi-body dynamic model of wind turbine is established and the accuracy of modeling is verified. Then,the dynamic model of four degrees of freedom(4-DOF)is built according to Lagrange equation,and the unknown parameters are estimated by Levenberg-Marquardt(LM)method,and the wind turbine model is built in SIMPACK software. Thirdly,the minimum standard deviation of the tower top longitudinal displacement is taken as the control objective,and the mass,damping coefficient and stiffness coefficient of the TMD are optimized by artificial fish swarm algorithm(AFSA). Finally,the wind turbine model with all-DOF is simulated under five load cases respectively. The simulation results show that,Whether wind and wave are in the same direction or not,TMD installated in the nacelle and platform simultaneously will have obvious effect on anter postorior displacement of the tower top,antoropstcrion bending mcmenes of the bace and pitch Angle of platform compared with no TMD.