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FLOATING OFFSHORE WIND POWER GENERATION FACILITY

Foreign code F180009658
File No. 3653
Posted date Nov 21, 2018
Country WIPO
International application number 2014JP055228
International publication number WO 2014141911
Date of international filing Mar 3, 2014
Date of international publication Sep 18, 2014
Priority data
  • P2013-050180 (Mar 13, 2013) JP
Title FLOATING OFFSHORE WIND POWER GENERATION FACILITY
Abstract [Problem] To make it possible to, in a spar type floating offshore wind power generation facility, suppress a reduction in power generation efficiency due to tilting of a tower, suppress rotational motion (yaw motion) around a vertical axis, prevent a ship from coming into contact with a mooring cable, and at the same time appropriately hold the tilted posture state of the tower.
[Solution] A floating offshore wind power generation facility (1) configured from a floating body (2), a mooring cable (3), a tower (4), and a windmill (5) installed at the top of the tower (4) and composed of a nacelle (6) and a plurality of blades (7), wherein the rotation axis of the windmill (5) has a predetermined upward angle in order to avoid contact between the blades (7) and the tower (4), and the windmill (5) is of a downwind type in which the blades (7) are attached to the leeward side of the nacelle (6) and installed with the back surfaces of the blades (7) facing windward, and the mooring point of the mooring cable (3) to the floating body (2) is set at a position below the surface of the sea and higher than the center of gravity of the floating body (2).
Outline of related art and contending technology BACKGROUND ART
Conventionally, as the main hydraulic, thermal and nuclear power generation method and the like have been used exclusively, or natural environment in recent years from the viewpoint of effective utilization of energy for power generation using natural wind is the wind turbine has attracted attention. The wind turbine power generating facility is, the land-based stationary type and stationary type and water (mainly sea) but, from the coastal area positioned behind the mountain in the case of faced Japan, coastal region can be expected with the stable air is less in the seashore. On the other hand, Japan, four sides are surrounded by a sea, suitable for offshore wind power generation and may be easily obtained, is subject to few restrictions on the installation advantages. Therefore, many offshore floating wind power generation facility in recent years have been proposed.
For example, in the following Patent Document 1, a rectangular pillar-shaped hollow structure of the triangular plane in combination with a floating float on water, provided on the power generation of a wind turbine for wind power generating apparatus has been proposed. For floating the float on a water surface is' a pontoon-type ' referred to.
In addition, in the following Patent Document 2, the upper of the article placed on the floating unit and a plurality of, the inner end of the center of the predetermined horizontal direction connected to the outer end extends to each of the floating unit is connected to the elongated rigid connecting part, and a tensile force generated between the floating The tensile part and has been proposed that the floating structure.
In the following Patent Document 3, the floating unit and a plurality of floating in water, a rigid annular portion connected to the floating coupling device and, on the bottom of a substantially middle portion of the annular anchoring and tethering means, the position of the floating body and the position detection means for detecting, tidal flow detection means for detecting, in a manner that the variable angle with respect to the flow attached to a steering and a plurality of floating body, each of the rudder angle with respect to the flow by adjusting the substantially middle portion of the annular center of the floating unit to vary the position of each position control part and the floating structure has been proposed. Patent document 2, according to the floating structure 3, the floating submerged under water and the float in a state where the 'semi-sub-type' referred to.
Further, in the following Patent Document 4, the lid of the upper and lower, between them of a cylindrical shape and are continuously installed on the precast concrete block PC and the steel material obtained by bonding together the lower floating body, the lower to the floating body PC steel material integrally bonded, the precast concrete block having a diameter smaller than an upper precast concrete block and the top cover and a floating body, the lower floating lower inside of the partition wall is formed by a plurality of ballast tank, the upper floating body at the inside of the plurality of watertight compartments by a partition wall formed of the floating structure is an offshore wind turbine generator has been proposed. This Patent Document 4 is, as the fishing float of the float in an upright state at 'spar-type' referred to.
Said spar-type floating body is, not only can be attached to the floating body of the base-one, pontoon-type or other than semi-sub-type, as well as economic advantages, from the viewpoint of excellent stability of the floating body has.
Hence the applicants also, in the following Patent Document 5, as shown in Fig. 25, and a floating body 51, the floating body 51 provided at the upper side 52 and the deck, the deck 52 and tethered to the mooring line 53, the deck 52 and 54 are erected on the tower, the tower 54 at the top of the nacelle 55 and a plurality of the wind turbine facility 56, 56... Made of a wind power generation plant 50, 51 is the floating body, made of concrete pre-cast cylindrical body in the height direction are stacked in a plurality of steps, each pre-cast steel in the cylindrical body and to improve the integrated PC in fixing the lower portion 51A and the floating structure made from concrete, this lower concrete portion 51A provided at the upper side of the floating structure to an upper portion 51B and the floating structure and a steel, which have openings at the upper end portion of the bottomed hollow portion of the spar-type floating structure, at least at the time of constructing the tower is provided on the deck 52 is elevated by the lifting equipment and is used by the tower, can be contained inside A floating 51 of the spur-type wind power generation plant is proposed.
Scope of claims (In Japanese)請求の範囲 [請求項1]
 浮体と、係留索と、タワーと、タワーの頂部に設備されるナセル及び複数のブレードからなる風車とから構成された浮体式洋上風力発電設備において、
 前記風車は、回転軸に所定角度の上向き角を付けており、かつ前記ブレードをナセルの風下側に取り付け、ブレードの背面を風上に向けて設置するダウンウィンド型式とし、
 前記係留索の浮体への係留点は、海面下であってかつ浮体の重心よりも高い位置に設定したことを特徴とする浮体式洋上風力発電設備。

[請求項2]
 前記浮体は、下部側がコンクリート製のプレキャスト筒状体を高さ方向に複数段積み上げたコンクリート製浮体構造とし、上部側が鋼部材からなる鋼製浮体構造とした請求項1記載の浮体式洋上風力発電設備。

[請求項3]
 前記浮体の下部側に周面より突出するヨー抑制フィンを周方向に間隔を空けて複数設けてある請求項1,2いずれかに記載の浮体式洋上風力発電設備。

[請求項4]
 平均風速作用時に前記ブレードの回転面がほぼ鉛直面となるようにバラスト重量を調整してある請求項1~3いずれかに記載の浮体式洋上風力発電設備。

[請求項5]
 前記コンクリート製浮体構造は、前記プレキャスト筒状体が周方向に複数に分割された分割プレキャスト筒状体を接合して構成され、前記プレキャスト筒状体の外周に、緊張力が導入されたアウターケーブルを周方向に沿って巻回してある請求項2記載の浮体式洋上風力発電設備。

[請求項6]
 前記アウターケーブルは、前記プレキャスト筒状体の軸方向に間隔をあけて複数設けてある請求項5記載の浮体式洋上風力発電設備。

[請求項7]
 前記アウターケーブルの定着具は前記プレキャスト筒状体の直径方向に対向する2箇所に設けてあり、前記定着具に前記プレキャスト筒状体を吊り上げる際の吊り上げ金具を備えてある請求項5、6いずれかに記載の浮体式洋上風力発電設備。

[請求項8]
 前記アウターケーブルは仮設とされ、前記浮体式洋上風力発電設備の設置時には取り外し可能としてある請求項5~7いずれかに記載の浮体式洋上風力発電設備。

  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • TODA CORPORATION
  • KYOTO UNIVERSITY
  • HITACHI, LTD.
  • Inventor
  • SATO Iku
  • ASANO Hitoshi
  • UTSUNOMIYA Tomoaki
  • YOSHIDA Shigeo
IPC(International Patent Classification)
Specified countries National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS KE KG KN KP KR KZ LA LC LK LR LS LT LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN TD TG
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