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Load mitigation of unbalanced wind turbines using PI-R individual pitch control

机译：使用PI-R独立变桨控制减轻不平衡风力发电机的负荷

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摘要

This study discusses the load mitigation of unbalanced wind turbines, including balanced and unbalanced loads. Regarding the wind turbine load reduction, it has been shown that individual pitch control (IPC) is more promising in comparison with collective pitch control. However, wind turbine unbalance will cause extra loads and fatigue on the wind turbine rotor, which has not been taken into consideration by the traditional IPC method. This study presents a new control strategy to mitigate the loads of the unbalance wind turbines. An IPC scheme consisting of a proportional-integral (PI) controller and two resonant (R) compensators is presented. The PI-R regulator is implemented in the hub reference frame to reduce both the balanced and unbalanced loads of the turbine. The wind turbine code FAST (fatigue, aerodynamics, structures and turbulence) is used for the wind turbine load modelling. The simulations are conducted on the NREL upwind 1.5 MW wind turbine model. Elimination of both the balanced and unbalanced loads of the wind turbine has been achieved, so that PI-R IPC is demonstrated as an effective means for load mitigation of unbalanced wind turbines.
机译：本研究讨论了不平衡风力涡轮机的负载减轻，包括平衡和不平衡负载。关于风力涡轮机的负荷降低，已经表明，与集中变桨控制相比，单独变桨控制（IPC）更有希望。然而，风力涡轮机的不平衡将导致风力涡轮机转子上的额外负载和疲劳，而传统IPC方法并未考虑到这一点。这项研究提出了一种减轻不平衡风力涡轮机负荷的新控制策略。提出了一种由比例积分（PI）控制器和两个谐振（R）补偿器组成的IPC方案。 PI-R调节器安装在轮毂参考系中，以减少涡轮机的平衡负载和不平衡负载。风力发电机代码FAST（疲劳，空气动力学，结构和湍流）用于风力发电机负荷建模。在NREL迎风1.5 MW风力发电机模型上进行了仿真。已经消除了风力涡轮机的平衡负载和不平衡负载，因此PI-R IPC被证明是减轻不平衡风力涡轮机负载的有效手段。

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