Control Strategy for a Point-Absorber Wave Energy Converter

Volume 9: Rodney Eatock Taylor Honoring Symposium on Marine and Offshore Hydrodynamics; Takeshi Kinoshita Honoring Symposium on Offshore Technology Pub Date : 2019-06-09 DOI:10.1115/omae2019-95836

Qiao Li, M. Murai

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Abstract

Linear driving wave energy converter (WEC) system need to control the electric generator to obtain more power generation. Electric power is consumed by control, but it is possible to control the natural period of the floating motion. By resonating the movement of the float part with wave, it is possible to obtain the power generation more than the control power consumption, the total power generation performance will be improved. In this study, to ensure the WEC safety and performance for various wave condition, especially high wave height, the electrical control algorithms are changed for different wave condition. A control strategy is proposed for various wave condition considering the control force limitation and motion amplitude limitation. Basis on the control strategy, the range of operation by electric control is estimated. In addition, by estimating the expected value of power generation in the set sea, the setting parameters of the WEC can be discussed according to the wave situation.

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点吸收波能变换器的控制策略

线性驱动波能变换器(WEC)系统需要对发电机进行控制以获得更大的发电量。电力是由控制消耗的，但可以控制浮动运动的自然周期。通过浮子部分与波浪运动的共振，可以获得大于控制功耗的发电功率，提高总发电性能。在本研究中，为了保证WEC在各种波浪条件下，特别是在高浪高条件下的安全性和性能，针对不同的波浪条件改变了电气控制算法。在考虑控制力限制和运动幅度限制的情况下，提出了一种适用于各种波动条件的控制策略。在此控制策略的基础上，对电动控制的运行范围进行了估计。此外，通过估算设定海域的发电量期望值，可以根据海浪情况讨论WEC的设定参数。

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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来源期刊

Volume 9: Rodney Eatock Taylor Honoring Symposium on Marine and Offshore Hydrodynamics; Takeshi Kinoshita Honoring Symposium on Offshore Technology

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