An attempt to control the motion of floating current turbine by the pitch control

OCEANS'11 MTS/IEEE KONA Pub Date : 2011-12-19 DOI:10.23919/OCEANS.2011.6106923

K. Takagi, Y. Suyama, K. Kagaya

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引用次数: 8

Abstract

Recently, R&D of marine renewable energy becomes very popular all over the world. In this paper, the contra-rotating turbines are adopted as an ocean current power generator. The contra-rotating turbine system is theoretically torque free, since the second blade counters the first blade torque. Therefore, small main body and low cost mooring might be achieved. On the other hand, the motion control of the device may be necessary for a steady power supply, protection from fatigue damage of blade, and so on, because the blade size is larger than that of main body and thus the influence of unknown disturbances in the real sea is supposed to be big. In order to overcome this problem, the blade pitch control is utilized to control the motion of the device. The blade force and equation of motions are formulated and numerical simulation is performed based on these formulas to find theoretically how to change the blade pitch for motion control. A simple experiment with a scale model is also performed as the first step of the motion control. It is confirmed that it is possible to move the model perpendicular to the flow direction by the blade pitch control.

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利用螺距控制控制浮流涡轮运动的尝试

近年来，海洋可再生能源的研发在世界范围内非常流行。本文采用对转水轮机作为海流发电机。对转涡轮系统理论上是无扭矩的，因为第二个叶片抵消了第一个叶片的扭矩。因此，可以实现小主体、低成本的系泊。另一方面，由于叶片尺寸比主体尺寸大，在实际海中未知干扰的影响较大，因此装置的运动控制可能需要稳定的电源，防止叶片疲劳损伤等。为了克服这一问题，利用桨距控制来控制装置的运动。建立了叶片力和运动方程，并在此基础上进行了数值模拟，从理论上找到了改变叶片节距进行运动控制的方法。作为运动控制的第一步，还进行了一个简单的比例模型实验。证实了通过桨距控制使模型垂直于气流方向移动是可能的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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OCEANS'11 MTS/IEEE KONA

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