针对漂浮式风电机组叶片载荷、功率及浮式基础振动耦合问题,以尾缘襟翼偏角为输入,以叶根挥舞弯矩,电功率,浮式基础纵摇、艏摇为输出,设计无模型自适应控制系统。同时,将无模型自适应控制与漂浮式风电机组的基准主控系统通过滤波进行频率解耦。在改进FAST的含尾缘襟翼的气弹-伺服仿真平台中进行验证,结果表明所设计的无模型自适应控制系统在不牺牲功率波动的条件下,能够降低叶片疲劳载荷和基础振动。此外,交叉小波分析结果表明,尾缘襟翼控制量的引入削弱了漂浮式风电系统固有的气弹同步相关性,减少了入流风作用在风轮上的能量。
Abstract
Oriented towards the coupling of blade loads, power and floating platform motions in floating wind turbine systems, a model free adaptive control based on trailing edge flap is presented. In this approach, blade root flap-wise bending moments, generator power, platform-pitch and -yaw motions are selected as the control output. Meanwhile, output signals were filtered by specific frequencies to decouple the model free adaptive control from the baseline control. The proposed control was numerically tested in the modified FAST aero-servo-elastic code equipped with trailing-edge-flap interfaces. Numerical results show considerable fatigue load reductions on blades and floating platforms without sacrificing power fluctuation. Further, the in-phase aero-elastic coupling relationships in FOWT systems are impaired by introducing the servo-dynamics of trailing edge flaps, further reducing the energy exerted on wind rotor from inflow wind.
关键词
海上风电 /
风电机组 /
基础运动 /
降载 /
尾缘襟翼 /
无模型自适应控制
Key words
offshore wind power /
wind turbine /
platform motion /
load reduction /
trailing edge flap /
model free adaptive control
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基金
国家重点研发计划（2018YFB1501103）; 中国长江三峡集团有限公司科研项目（合同编号：202103506）
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