Strategies for active tuning of Wave Energy Converter hydraulic power take-off mechanisms
Strategies for active tuning of Wave Energy Converter hydraulic power take-off mechanisms
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DOI：
10.1016/j.renene.2016.03.007
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发表时间：
2016-08
期刊：
影响因子：
8.7
通讯作者：
C. Cargo;A. Hillis;A. Plummer
中科院分区：
文献类型：
--
作者：
C. Cargo;A. Hillis;A. Plummer
本文提出了一种实用的波能转换器（WEC）的动力输出（PTO）的主动调谐方法的研究。它是区别于其他模拟研究的细节和现实的输入和PTO模型的水平。在欧洲海洋能源中心记录的波浪数据用于推导液压PTO的详细组件级模型的输入数据。提出了一种获得最佳PTO阻尼系数的方法，对于给定的海况，和开环主动调谐方法用于调整PTO参数，以实现在服务中的最佳阻尼。调查表明，由于海况估计误差和现实PTO的复杂动态，将液压PTO调整到估计的波浪频率是一项困难的任务。未来波的预览知识被证明对所研究的设备的能量捕获没有提供有意义的改善。值得注意的是，在使用简化的线性PTO模型或简化的海况的类似工作中观察到的功率增益在这里没有看到，这表明在WEC开发的模拟阶段期间PTO的过度简化可能导致不正确的设计决策以及随后的额外延迟和成本。
This paper presents a study of practically implementable active tuning methods for a Wave Energy Converter (WEC) power take-off (PTO). It is distinguished from other simulation studies by the level of detail and realism in the inputs and the PTO model. Wave data recorded at the European Marine Energy Centre is used to derive input data for a detailed component level model of a hydraulic PTO. A methodology is presented for obtaining the optimum PTO damping co-efficient for a given sea state, and an open loop active tuning method is used to adjust the PTO parameters to achieve this optimum damping in service. The investigation shows that tuning of a hydraulic PTO to an estimated wave frequency is a difficult task due to sea state estimation errors and the complex dynamics of a realistic PTO. Preview knowledge of the future waves was shown to provide no meaningful improvement in energy capture for the device under investigation. Significantly, power gains observed in similar work using simplified linear PTO models or simplified sea states are not seen here, demonstrating that over-simplification of the PTO during the simulation phase of WEC development could lead to incorrect design decisions and subsequent additional delay and cost.