Next generation floating offshore wind power generation system demonstration research (OPTIFLOW)
現在、国立研究開発法人 新エネルギー・産業技術総合開発機構 (NEDO) の委託事業として技術開発を進めている、次世代浮体式洋上風力発電システム実証研究と並行して、さらにその先の未来を見据えた、新たな次世代浮体式洋上風力発電システムの実証研究も行っています。広島県倉橋島の沖合での1/10モデルによる実海域試験を終え 、1/1実証機の導入に向けたフィージビリティスタディ行っていきます。
In parallel with the next-generation floating offshore wind power generation system demonstration research, which is currently promoting technology development as a commissioned project of the New Energy and Industrial Technology Development Organization (NEDO), the National Research and Development Corporation in anticipation of the future ahead We are also conducting an empirical study of a new generation of floating offshore wind power generation systems. After conducting an on-site test with a 1/10 model off the coast of Kurahashijima Island in Hiroshima Prefecture, we will conduct a feasibility study for the introduction of a 1/1 demonstration aircraft.
The yaw control system is eliminated by using the wind direction tracking ability by the single-point mooring method, and combined with the reduced weight nacelle and semi-sub type floating body, while achieving reduction of installation and operation costs, realization of high efficient power generation of 6 MW I aim at. We will continue to develop the next generation floating offshore wind power generation system with a power generation cost of 20 yen / kWh in 2030 as a trump card of renewable energy.
[Downwind rotor] Avoids connection with guy wires and improves wind direction tracking.
[Guy wire] By connecting the top of the tower and the end of the three arms with six (two each) guy wires, the weight reduction and weight reduction of the tower and floating body are achieved.
[Turret mooring] A single-point mooring device (turret) is provided under the upwind floater to make the float passively follow the wind direction. This eliminates the yaw control system of a typical wind turbine, and can reduce failures due to these, as well as manufacturing and maintenance costs. In addition, since the head rotates in the direction of receiving the external force, the mooring force is warmed, and the load acting on the floating body structure (the toe load of the arm) can be reduced.
[Wire-chain combined mooring line] Wires are used for mooring lines to reduce weight and cost.
[Two-bladed rotor] Reduced production, maintenance cost and failure rate of blades, hubs and pitch systems compared to three wings.In addition, the installation cost of the rotor installation can be reduced. The load is reduced by holding horizontally at the time of storm.
[Lightweight and compact nacelle] A lightweight and compact nacelle that integrates a generator and a gear and eliminates the nacelle cover. In this way, stability against overturning is ensured, and the load acting on the tower and floating structure is reduced.
[Two-arc section inclined tower] It has a cross-sectional shape that generates lift in response to changes in wind direction, and improves the yaw followability of the floating body. In addition, by inclining to the downwind side, aerodynamic stability is improved by the rotor and contact between the rotor and the guy wire is avoided.
[Semi-sub floating body] As with general semi-sub floating bodies, we try to reduce the weight and reduce the fluctuation in waves and the dynamic effects on wind turbines and towers.
風 車 Windmills
浮 体 Floating body
係 留 Suspended
※ This is partially using the results of the commissioned work of the New Energy and Industrial Technology Development Organization (NEDO).