成果報告書詳細
管理番号20140000000535
タイトル*平成25年度中間年報 風力等自然エネルギー技術研究開発 洋上風力発電等技術研究開発 洋上風力発電システム実証研究(銚子沖)
公開日2014/8/23
報告書年度2013 - 2013
委託先名東京電力株式会社
プロジェクト番号P07015
部署名新エネルギー部
和文要約
英文要約Title : Demonstrative Research on Offshore Wind Power Generation System (Choshi) (FY2010-2014) FY2013 Annual Report

1) Development of offshore wind turbine generator :

・Effectiveness of the nacelle anti-corrosion systems are good. Air tight systems and salty particle removal filters done good works.
・Effectiveness of the lightning protection system is good. The W.T. has no damage.
・Effectiveness of the erosion protection systems for blades are under observation. The little erosion is observed on the edge of one blade.

2) Research and development of the foundation :

Field survey was conducted to investigate the present state of seafloor. By comparing the profile of the seabed and that obtained last year, it was confirmed that seafloor has been stable.

3) Advancement of dynamic analysis model and verification by measurements :

i) Measurement of tower oscillation
The field measurement of distortions and accelerations on the wind turbine tower has been continuing. It was confirmed that wind loads and response accelerations were affected by the wind turbine control and that the maximum wind loads in the land breeze were larger than the ones in the sea breeze.

ii) Improvement of dynamic response analysis:
Excitation test of the test wind turbine was carried out by setting the pitch angle to feather and fine to estimate the structural damping and the natural frequency of the wind turbine tower. The structure damping of the first and the second mode of the tower was 0.2% and 2.5% respectively. A wind turbine model was constructed based on the estimated frequency and the damping.

iii) Load evaluation of the test wind turbine :
By adapting gain scheduling for the pitch control of the wind turbine, the maximum tower base moment in fore-aft direction can be predicted. The prediction accuracy of the tower base moment in side-by-side direction can be improved by considering
the rotor mass imbalance.

4) Construction of tower and foundation :

The construction of the foundation was completed at the Port of Higashi-Harima. The foundation was towed to the site and deployed. The filter units for anti-scouring were also deployed.

5) Construction of submarine cable, power system interconnection and transformation :

The construction of construction of submarine cable, power system interconnection and transformation was completed.

6) Development of Operation & Maintenance Technology :

The demonstration and research tests about the improvements of maintenance systems have been done and have got good know-hows as follows.
・The way to support from land operation room by using remote support system, and so on.

Effectiveness of the improvements of control systems is good.
CMS (Condition Monitoring Systems) shows that every data is in regular band.

7) Detailed research of the impact on environment :

In 2013, the current environmental condition after the structure was set up has been researched, and the research data has been analyzed.
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