基于惯容的风力机结构控制装置作用位置研究

INFLUENCE OF LOCATIONS FOR INERTER-BASED WIND TURBINE STRUCTURAL CONTROL SYSTEMS

针对基于惯容的结构控制装置(IDVA)最优作用位置问题,建立基于拉格朗日方程的风力机动力学模型,给出装置参数优化方法。优化问题考虑IDVA系统安装在塔架不同位置对减振性能的影响,以及塔架位移与IDVA相对位移之间的相互影响。结果表明:IDVA系统安装在塔架的位置越高减振效果越好。不考虑IDVA行程时,IDVA系统可极大提升减振性能;考虑IDVA行程时,IDVA系统减振性能有所下降,在该优化问题条件下,塔顶位移与IDVA行程存在冲突,无法同时得到改善。

It has been demonstrated that mechanical loads of wind turbines can be effectively reduced by using inerter-based dynamic vibration absorbers(IDVA). This paper investigates the influence of IDVAs’ locations on the load mitigation performance of wind turbines. To identify the optimal location of IDVA,a dynamic model based on Lagrange equations is derived for an onshore wind turbine,and an optimization method is proposed for IDVA parameters. In the optimization problem,the influence of IDVA locations on the tower in terms of the vibration reduction performance is considered,and the trade-off between the tower top displacement and the relative displacement of IDVA is studied. The results show that better vibration reduction performances can be obtained with higher IDVA locations. If the relative displacement of IDVA is not constrained,the vibration reduction performance can be significantly improved;while if the relative displacement of IDVA is constrained,the vibration reduction performance could be slightly degraded compared with the case without the relative displacement constraint of IDVA. It is found that there exist trade-offs between tower top displacement and the relative displacement of IDVA,where those cannot be simultaneously improved.