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首页> 外文期刊>Ocean Engineering >Integrated bi-directional vibration control and energy harvesting of monopile offshore wind turbines
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Integrated bi-directional vibration control and energy harvesting of monopile offshore wind turbines

机译：单桩海上风机的集成双向振动控制和能量收集

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摘要

Offshore wind turbines (OWTs) subjected to combined wind and wave loadings experience excessive bi-directional vibrations that adversely influence the system performance and the structural integrity. The present paper utilizes a three-dimensional pendulum tuned mass damper (3d-PTMD) to mitigate the bi-directional vibrations as well as harvest the kinetic energy using a linear electromagnetic energy harvester. The proposed energy harvester consists of magnets and coil assemblies which are connected with the pendulum to convert the kinetic energy of the pendulum into electricity. An analytical model of the offshore wind turbine coupled with the 3d-PTMD is established using Euler-Lagrangian equation. The mathematical model of the linear electromagnetic energy harvester is established and integrated with the wind turbine model. The optimum design of the electromagnetic energy harvester to minimize the nacelle displacement RMS as well as to maximize the energy output is determined via a numerical search method. The NREL 5 MW baseline wind turbine model is utilized to evaluate the performance of the 3d-PTMD and the energy harvester. Results show that the 3d-PTMD can reduce the bi-directional vibrations induced by misaligned wind and wave loadings. Additionally, electrical energy in orders of magnitude of kilowatts can be harnessed via using the energy harvester.
机译：承受风和海浪载荷的海上风力涡轮机（OWT）会遭受过度的双向振动，这会对系统性能和结构完整性产生不利影响。本文利用三维摆式质量阻尼器（3d-PTMD）来减轻双向振动，并使用线性电磁能量收集器收集动能。提出的能量收集器由与摆锤连接的磁铁和线圈组件组成，以将摆锤的动能转换为电能。利用欧拉-拉格朗日方程建立了与3d-PTMD耦合的海上风力发电机的解析模型。建立了线性电磁能量收集器的数学模型，并将其与风力涡轮机模型集成在一起。通过数值搜索方法确定了使机舱位移RMS最小以及能量输出最大化的电磁能量收集器的最佳设计。 NREL 5 MW基准风力涡轮机模型用于评估3d-PTMD和能量收集器的性能。结果表明，3d-PTMD可以减少由于风和波浪载荷未对准而引起的双向振动。另外，可以通过使用能量收集器来利用千瓦数量级的电能。

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