2013 Fiscal Year Final Research Report
Proposal of Giant Wind Turbine in Deep Floating Offshore and its Dynamic Analysis
| Project/Area Number |
23360433
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Energy engineering
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| Research Institution | The University of Tokyo |
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Principal Investigator |
CHUICHI Arakawa 東京大学, 工学(系)研究科(研究院), 教授 (30134472)
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| Co-Investigator(Kenkyū-buntansha) |
IIDA Makoto 東京大学, 先端科学技術研究センター, 准教授 (40345103)
KOBAYASHI Yohei 舞鶴工業高等専門学校, 准教授 (50548071)
INOUE Shunji 独立行政法人海上技術安全研究所, 洋上再生エネルギー開発系, 系長 (50575157)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | 風力エネルギー / 洋上風車 / 浮体式風車 / ネガティブ・ダンピング / 連成振動 / ピッチ制御 |
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| Research Abstract |
Wind turbines are usually controlled with the pitch control to keep the rotor speed stable and to avoid the overload. However, the control causes some troubles for the operation of floating offshore wind turbine. Specifically, the tower oscillating motion is increased, which is called as the negative damping of floating wind turbine. Negative damping problem induces the increasing of tower fatigue load. This study describes an original concept, named as RTS control, of pitch control system for floating wind turbine to control turbine rotation and tower movement. The concept of RTS is to control the blade pitch with rotor speed and tower pitch angler velocity. Simulation results are well matched to tank test. Simulations in steady wind and regular wave condition show that RTS control has the ability to avoid negative damping. It is also confirmed that RTS control avoids negative damping and reduces fatigue load of tower maintaining the power in the fluctuating wind and irregular wave.
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