海上风力机在极端工况下的动力响应特性分析

Dynamic response characteristics of offshore wind turbines under extreme condition

针对海上风力机在极端环境下动力响应问题,利用自回归滑动平均方法建立具有功率谱密度特性的风速模型。结合海上风力机三维结构动力学模型,研究海上风力机在极端工况下的动力响应特性,得出风力机线性速度、平均运动能、平均力矩等参数随时间变化的曲线,分析了曲线中的参数变化对风力机正常运行的影响。研究结果表明,风力机叶尖的平均运动能随着时间的增加呈衰减振荡趋势,平均力矩从0~16 s逐渐衰减变小,16~18 s线性上升,20~60 s呈抛物线变化趋势,并且其它动力响应参数也符合风力机实际运行规律。该研究为海上风力机在极端工况下运行状态参数监测提供一定的参考。

Aiming at the dynamic response problem about offshore wind turbine in the extreme environment, it uses autoregressive moving average method to establish a wind speed model of power spectral density characteristics. The dynamic response characteristics combined with the three-dimensional dynamic model of offshore wind turbine under extreme conditions are studied.The curves on linear velocity, average motion energy and torque of wind turbine changes with time are obtained, the impact of parameter variation on normal operation of wind turbine is analyzed.The results show that the total motion of the blade end of the wind turbine decreases with the increase of time, and the average torque decreases gradually from 0 s to 16 s, and increases linearly from 16 s to 18 s, and a parabolic trend from 20 s to 60 s. The results provide some reference value for offshore wind turbine operation monitoring under extreme operating conditions.