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首页> 外文会议>ASME international conference on ocean, offshore and arctic engineering >NUMERICAL ANALYSIS ON HYDRAULIC POWER TAKE-OFF FOR WAVE ENERGY CONVERTER AND POWER SMOOTHING METHODS
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NUMERICAL ANALYSIS ON HYDRAULIC POWER TAKE-OFF FOR WAVE ENERGY CONVERTER AND POWER SMOOTHING METHODS

机译：波浪能量变换器液压取力的数值分析及功率平滑方法

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摘要

One of the primary challenges for wave energy converter (WEC) systems is the fluctuating nature of wave resources, which require the WEC components to be designed to handle loads (i.e., torques, forces, and powers) that are many times greater than the average load. This approach requires a much greater power take-off (PTO) capacity than the average power output and indicates a higher cost for the PTO. Moreover, additional design requirements, such as battery storage, are needed, particularly for practical electrical grid connection, and can be a problem for sensitive equipment (e.g., radar, computing devices, and sensors). Therefore, it is essential to investigate potential methodologies to reduce the overall power fluctuation while trying to optimize the power output from WECs. In this study, a detailed hydraulic PTO model was developed and coupled with a time-domain hydrodynamics model (WEC-Sim) to evaluate the PTO efficiency for WECs and the trade-off between power output and fluctuation using different power smoothing methods, including energy storage, pressure relief mechanism, and a power-based setpoint control method. The study also revealed that the maximum power fluctuation for WECs can be significantly reduced by one order of magnitude when these power smoothing methods are applied.
机译：波浪能转换器（WEC）系统的主要挑战之一是波浪资源的波动性，这要求将WEC组件设计为承受比平均值大很多倍的负载（即，扭矩，力和功率）。加载。与平均功率输出相比，此方法需要更大的取力器（PTO）容量，并且表示PTO的成本更高。此外，特别是对于实际的电网连接，还需要诸如电池存储之类的附加设计要求，并且这对于敏感设备（例如，雷达，计算设备和传感器）可能是个问题。因此，在尝试优化WEC的功率输出的同时，研究潜在的方法以减少总体功率波动至关重要。在这项研究中，开发了详细的液压PTO模型，并与时域流体动力学模型（WEC-Sim）结合，以评估WEC的PTO效率以及使用包括能量在内的不同功率平滑方法的功率输出与波动之间的权衡存储，泄压机制和基于功率的设定点控制方法。研究还表明，采用这些功率平滑方法后，WEC的最大功率波动可以显着降低一个数量级。

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