JP7842390B2 - Floating offshore wind power plant - Google Patents
Floating offshore wind power plantInfo
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- JP7842390B2 JP7842390B2 JP2023223863A JP2023223863A JP7842390B2 JP 7842390 B2 JP7842390 B2 JP 7842390B2 JP 2023223863 A JP2023223863 A JP 2023223863A JP 2023223863 A JP2023223863 A JP 2023223863A JP 7842390 B2 JP7842390 B2 JP 7842390B2
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- mooring
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- buoyancy body
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- tower
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
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- Wind Motors (AREA)
Description
本発明は、鉄筋コンクリート構造の浮体式洋上風力発電所に関するものである。This invention relates to a floating offshore wind power plant with a reinforced concrete structure.
近年、再生可能エネルギー利用の増加に伴い、洋上は風を遮る障害物が無く、風向き、風速が一定していて変わらないことから洋上風力発電は安定した電力を得られることが期待される。
現在、実用化されている洋上風力発電装置の構造は、陸上で稼働している装置と同様であり、洋上では陸上に比べて風力発電装置を設置するうえでの制約が少ないため、今後は、洋上での設置が増えていくものと考えられる。 In recent years, with the increasing use of renewable energy, offshore wind power generation is expected to provide a stable source of electricity because there are no obstacles to block the wind offshore, and the wind direction and speed remain constant.
Currently, the structure of offshore wind power generation equipment in practical use is similar to that of equipment operating on land. Since there are fewer constraints on installing wind power generation equipment offshore compared to on land, it is expected that offshore installations will increase in the future.
現在、ヨーロッパで普及している洋上風力発電装置の支柱が海底まで到達している着床式の場合は水深約５０ｍ位までの比較的水深が浅い場所に適しているが、日本の場合は、水深が比較的浅い大陸棚の面積が少ないため、日本では、風力発電装置を洋上に浮かべ、鎖、ワイヤーロープ等で海底に係留することにより位置を保持する浮体式に移行しつつあるのが現状である。Currently, in Europe, fixed-bottom offshore wind turbines, where the support structure reaches the seabed, are suitable for relatively shallow waters up to about 50 meters deep. However, in Japan, due to the limited area of relatively shallow continental shelves, there is a shift towards floating wind turbines, which are anchored to the seabed by chains, wire ropes, etc.
浮体式洋上風力発電装置は、水中に配置した浮体と、浮体に立設した塔部で構成され、塔部の頂部にナセルとブレードで構成した風力発電装置とを備えている。
浮体式洋上風力発電装置を海底に係留させる方法は、主に、スパー型、セミサブ型、バージ型、ＴＬＰ型の４種類の形式がある。 A floating offshore wind turbine consists of a floating structure placed in the water and a tower section erected on the floating structure. The tower section is equipped with a wind turbine consisting of a nacelle and blades at its top.
There are four main types of methods for mooring floating offshore wind turbines to the seabed: spar type, semi-submersible type, barge type, and TLP type.
現在では、設備１台あたりの大出力化が求められており、それに伴いブレードを長くして風車体受風面積を大きくする必要があり、現在ではブレードの長さが８０ｍを超える大型の洋上風力発電装置が実用化されつつある。Currently, there is a demand for higher output per wind turbine, which necessitates longer blades to increase the wind-receiving area of the turbine body. As a result, large offshore wind power generation devices with blades exceeding 80 meters in length are now being put into practical use.
従来、指定された海域に浮体式洋上風力発電装置を設置するためには、浮体を設置海域まで台船等により曳航して係留したあと、クレーン船等によって上部構造体を浮体の上端部に移動させ、浮体と上部構造体を連結させていた。Traditionally, in order to install a floating offshore wind power generation device in a designated sea area, the floating structure was towed to the installation area by a barge or similar vessel and moored there, and then the superstructure was moved to the upper end of the floating structure using a crane ship or similar vessel, and the floating structure and the superstructure were connected.
しかしながら、浮体式洋上風力発電装置が設置される水深５０ｍ以上の海域は、一般的な海洋工事が行われる海域に比べて海象条件が厳しい場合が多く、浮体式洋上風力発電装置の設置作業は、海象条件の厳しい状況下で比較的穏やかな時期を見計らって実施しなければならないため、設置作業の実施時期や期間が限定されるという問題があった。However, the sea areas with depths of 50 meters or more where floating offshore wind turbines are installed often have more severe oceanographic conditions than areas where general marine construction is carried out. As a result, the installation work for floating offshore wind turbines must be carried out during relatively calm periods under severe oceanographic conditions, which limits the timing and duration of the installation work.
さらに、浮体式洋上風力発電装置の設置は、大型作業船を用いて繊細な作業が要求されるため、建設コストの増加を招くといった問題もあった。Furthermore, the installation of floating offshore wind turbines requires delicate work using large work vessels, which leads to increased construction costs.
以上の現状に鑑み、本発明は、浮体式洋上風力発電所を設置する海に近い海岸に、浮体式洋上風力発電所を建設するための施設を構築し、超高層ビル等の建築工事で培った技術を活かして浮体式洋上風力発電所を建設し、陸上で組み立てた浮体式洋上風力発電所を水上に浮かべ、タグボート（曳舟）等で現場まで曳航することにより、施工日数の大幅な短縮と、陸上での効率的な建設方法を提供することを目的とする。In light of the above situation, the present invention aims to significantly shorten construction time and provide an efficient construction method on land by constructing facilities for building floating offshore wind power plants on the coast near the sea where the floating offshore wind power plants are to be installed, constructing the floating offshore wind power plants by utilizing the technology cultivated in construction work for skyscrapers and the like, and then floating the floating offshore wind power plants assembled on land onto the water and towing them to the site by tugboats or the like.
かかる課題を解決するため、請求項１に記載の発明は、複数枚のブレードと増速機や発電機を内蔵したナセルを支えるタワーで構成した浮体式洋上風力発電所において、洋上に配置するタワー部（４）を概ね円錐形の鉄筋コンクリート構造で構築し、頂上部（３３）を円形状の平面で形成し、前記頂上部（３３）にナセルを取り付けるための鋼管（２３）を取り付け、前記頂上部（３３）のタワー部上部直径（Ａ）は５ｍの円形で形成し、さらに頂上部（３３）のタワー部上部スラブ厚さ（Ｂ）は５００ｍｍで形成し、さらにタワー部（４）の頂上部（３３）からタワー底部（３９）までのタワー部高さ（Ｃ）は９７ｍで形成し、タワー部（４）の下部には各階の高さが共に５ｍで形成した４層構造の建屋（５）で構成し、さらにタワー部（４）の底部のタワー底部スラブ厚さ（Ｄ）は１ｍで形成し、タワー部（４）の下部のタワー部土台直径（Ｓ）を直径２５ｍの円形で形成したタワー部（４）と、水中に配置する浮力体部（８）は概ね円筒形で鉄筋コンクリート構造で構築すると共に、浮体式洋上風力発電所（１）を洋上に浮かべる浮体としての役目を果たすため内部を空洞で構成し、前記浮力体部（８）の鉄筋コンクリートの外周面、上下面の外皮の厚さは、上部、下部、外周面共に全て２００ｍｍで形成し、さらに浮力体部（８）の前後底部は前方向と後方向に向けて傾斜させた形状で形成し、さらに浮力体部（８）の浮力体部直径（Ｎ）は１００ｍの円筒形で形成し、さらに浮力体部（８）の前方傾斜部（３１）と後方傾斜部（３２）を除く浮力体部高さ（Ｊ）は１０ｍで形成し、さらに浮力体部（８）の前方向と後方向の前方傾斜部（３１）と後方傾斜部（３２）の前方傾斜部先端部高さ（Ｋ） と、後方傾斜部後端部高さ（Ｒ）は共に３ｍで形成し、さらに前方傾斜部（３１）と後方傾斜部（３２）の前方傾斜部角度（Ｍ）、後方傾斜部角度（Ｐ）は底面に対して共に１４度で形成し、前記前方傾斜部（３１）の前方傾斜部最大巾（Ｌ）と、前記後方傾斜部（３２）の後方傾斜部最大巾（Ｑ）は共に１２ｍで形成し、さらに浮力体部（８）の側面には、６本の係留ワイヤー（Ａ）（１１）、係留ワイヤー（Ｂ）（１２）、係留ワイヤー（Ｃ）（１３）、係留ワイヤー（Ｄ）（１４）、係留ワイヤー（Ｅ）（１５）、係留ワイヤー（Ｆ）（１６）を浮力体部（８）の側面の定位置でガイドさせるため、半径３０ｃｍで概ね半円筒状に形成した６か所の係留ワイヤー用ガイド穴（Ａ）（２５）、係留ワイヤー用ガイド穴（Ｂ）（２６）、係留ワイヤー用ガイド穴（Ｃ）（２７）、係留ワイヤー用ガイド穴（Ｄ）（２８）、係留ワイヤー用ガイド穴（Ｅ）（２９）、係留ワイヤー用ガイド穴（Ｆ）（３０）を、浮力体部（８）の上面の水平面で見たときに中心から６０度ごとに放射状に延設した浮力体部（８）の側面の位置に縦形に形成した浮力体部（８）と、海面の波浪による抵抗を最小限に抑え、浮体式洋上風力発電所（１）の揺れを抑えるため、タワー部（４）と浮力体部（８）を連結するための８本の支柱（６）は共に直径２ｍ、肉厚３０ｍｍ、長さ１０ｍの円筒状の鋼管で形成され、浮力体部（８）の上面の中心から半径１０５０ｃｍの円周上の、水平面で見たときに中心から４５度ごとに放射状に延節された位置に８本の支柱（Ａ）（４５）、支柱（Ｂ）（４６）、支柱（Ｃ）（４７）、支柱（Ｄ）（４８）、支柱（Ｅ）（４９）、支柱（Ｆ）（５０）、支柱（Ｇ）（５１）、支柱（Ｈ）（５２）の中心が位置するように垂直に取り付けられると共に、８本の支柱（Ａ）（４５）、支柱（Ｂ）（４６）、支柱（Ｃ）（４７）、支柱（Ｄ）（４８）、支柱（Ｅ）（４９）、支柱（Ｆ）（５０）、支柱（Ｇ）（５１）、支柱（Ｈ）（５２）の上部を、タワー底部（３９）の下面に取り付けた支柱（６）と、タワー部（４）の概ね頂上部（３３）からタワー底部（３９）を貫通し、浮力体部（８）の中心部の概ね底部まで、直径４ｍの円筒形で形成した竪穴区画（３４）と、浮体式洋上風力発電所（１）をＴＬＰ型で海底（９）に係留させるため、海底（９）に固定した６基の海底基礎杭（Ａ）（１７）、海底基礎杭（Ｂ）（１８）、海底基礎杭（Ｃ）（１９）、海底基礎杭（Ｄ）（２０）、海底基礎杭（Ｅ）（２１）、海底基礎杭（Ｆ）（２２）に対して、それぞれ６本の係留ワイヤー（Ａ）（１１）、係留ワイヤー（Ｂ）（１２）、係留ワイヤー（Ｃ）（１３）、係留ワイヤー（Ｄ）（１４）、係留ワイヤー（Ｅ）（１５）、係留ワイヤー（Ｆ）（１６）を取り付け、海面（７）の位置が支柱（６）の概ね上下中央位置になるように６本の係留ワイヤー（Ａ）（１１）、係留ワイヤー（Ｂ）（１２）、係留ワイヤー（Ｃ）（１３）、係留ワイヤー（Ｄ）（１４）、係留ワイヤー（Ｅ）（１５）、係留ワイヤー（Ｆ）（１６）を個々に巻取り・送出しするためのワイヤー巻取り・送出し機（６０）を建屋１階（３８）の内部の竪穴区画（３４）の側面近傍の円周上に均等に割り当て配置し、前記浮力体部（８）の側面に形成した係留ワイヤー用ガイド穴を経由させた係留ワイヤーの一端を、ワイヤー用滑車を介して前記タワー部（４）の建屋内に引き込み、個々の係留ワイヤーの長さを調節して浮力体部（８）を海面（７）に対して水平を保つように強制的に水没させることにより、浮体式洋上風力発電所 （１）が海面（７）に対して縦揺れ、横揺れを小さく抑え水平状態を維持するように構成したことを特徴とする。 To solve the above problem, the invention described in claim 1 is a floating offshore wind power plant consisting of a tower supporting a nacelle containing multiple blades, a speed increaser and a generator, wherein the tower section (4) to be placed offshore is constructed of a generally conical reinforced concrete structure, the top section (33) is formed as a circular plane, a steel pipe (23) for attaching the nacelle is attached to the top section (33), the upper diameter (A) of the tower section of the top section (33) is formed as a circle of 5 m, the upper slab thickness (B) of the tower section of the top section (33) is formed as 500 mm, and the height (C) of the tower section (4) from the top section (33) to the bottom section (39) is formed as 97 m. The lower part of the tower section (4) is composed of a four-story building (5) with each floor having a height of 5m, and the bottom of the tower section (4) has a tower base slab thickness (D) of 1m, and the base diameter (S) of the lower part of the tower section (4) is formed as a circle with a diameter of 25m. The tower section (4) and the buoyancy body section (8) to be placed in the water are generally cylindrical and constructed of reinforced concrete, and are hollow inside in order to serve as a floating body that will keep the floating offshore wind power plant (1) afloat on the ocean. The thickness of the outer skin of the buoyancy body section (8) is 200mm on the outer surface, top and bottom surfaces of the reinforced concrete, and the front and rear bottoms of the buoyancy body section (8) are forward The buoyancy body (8) is formed in a shape that is inclined toward the rear, and the diameter (N) of the buoyancy body (8) is formed in a cylindrical shape with a diameter of 100 mm, and the height (J) of the buoyancy body (8), excluding the forward inclined portion (31) and the rear inclined portion (32), is formed to be 10 m, and the height (K) of the tip of the forward inclined portion (31) and the height (R) of the rear inclined portion (32) of the buoyancy body (8) are both formed to be 3 m, and the angle (M) of the forward inclined portion (31) and the angle (P) of the rear inclined portion (32) are both formed to be 14 degrees with respect to the bottom surface, and the maximum width (L) of the forward inclined portion (31) and the rear inclined portion (32) The maximum width (Q) of the slanted section is 12 m in both cases, and furthermore, on the side of the buoyancy body section (8), there are six guide holes for mooring wires (A) (25), mooring wires (B) (26), mooring wires (C) (13), mooring wires (D) (14), mooring wires (E) (15), and mooring wires (F) (16), which are formed in a roughly semi-cylindrical shape with a radius of 30 cm, in order to guide the six mooring wires (A) (11), mooring wires (B) (26), mooring wires (C) (27), mooring wires (D) (28), mooring wires (E) (29), and mooring wires (F) (30), which are formed in a roughly semi-cylindrical shape with a radius of 30 cm, to guide the six mooring wires (A) (11), mooring wires (B) (26), mooring wires (C) (27), mooring wires (D) (28), mooring wires (E) (29), and mooring wires (F) (30), respectively. When viewed horizontally from the center of the upper surface of the buoyancy body (8), vertical buoyancy body sections (8) are formed on the sides of the buoyancy body section (8) that radiate outwards at 60-degree intervals from the center. In order to minimize resistance from waves on the sea surface and suppress the swaying of the floating offshore wind power plant (1), eight support columns (6) connecting the tower section (4) and the buoyancy body section (8) are both formed from cylindrical steel pipes with a diameter of 2m, a wall thickness of 30mm, and a length of 10m. Eight support columns (A) (45), (B) (46), (C) (47), (D) (48), and (E) (4) are formed vertically on the sides of the buoyancy body section (8) that radiate outwards at 45-degree intervals from the center when viewed horizontally from the center of the upper surface of the buoyancy body section (8). 9) A support column (6) is installed vertically so as to be positioned at the center of the eight support columns (A) (45), (B) (46), (C) (47), (D) (48), (E) (49), (F) (50), (G) (51), and (H) (52), and the upper parts of the support columns (A) (45), (B) (46), (C) (47), (D) (48), (E) (49), (F) (50), (G) (51), and (H) (52) are attached to the lower surface of the tower base (39), and a vertical shaft compartment (34) is formed in the shape of a cylinder with a diameter of 4 m, extending from approximately the top (33) of the tower section (4) through the tower base (39) to approximately the bottom of the center of the buoyancy body section (8), and in order to moor the floating offshore wind power plant (1) to the seabed (9) in the TLP type, Six mooring wires (A) (11), mooring wires (B) (12), mooring wires (C) (13), mooring wires (D) (14), mooring wires (E) (15), and mooring wires (F) (16) are attached to each of the six fixed seabed foundation piles (A) (17), seabed foundation piles (B) (18), seabed foundation piles (C) (19), seabed foundation piles (D) (20), seabed foundation piles (E) (21), and seabed foundation piles (F) (22), respectively, so that the position of the sea surface (7) is approximately in the vertical center of the support pillars (6) and the six mooring wires (A) (11), mooring wires (B) (12), mooring wires (C) (13), mooring wires (D) (14), and mooring wires (E) ( 15) A wire winding and releasing machine (60) for individually winding and releasing the mooring wires (F) (16) is evenly distributed on the circumference near the side of the vertical shaft compartment (34) inside the first floor (38) of the building, and one end of the mooring wire, which has been passed through guide holes for mooring wires formed on the side of the buoyancy body (8), is pulled into the building of the tower section (4) via a wire pulley, and the length of each mooring wire is adjusted to forcibly submerge the buoyancy body (8) so that it remains horizontal to the sea surface (7), thereby configuring the floating offshore wind power plant (1) to minimize vertical and horizontal swaying relative to the sea surface (7) and maintain a horizontal state .
請求項１に記載の発明によれば、複数枚のブレードと増速機や発電機を内蔵したナセルを支えるタワーで構成した浮体式洋上風力発電所において、洋上に配置するタワー部（４）を概ね円錐形の鉄筋コンクリート構造で構築し、頂上部（３３）を円形状の平面で形成し、前記頂上部（３３）にナセルを取り付けるための鋼管（２３）を取り付け、前記頂上部（３３）のタワー部上部直径（Ａ）は５ｍの円形で形成し、さらに頂上部（３３）のタワー部上部スラブ厚さ（Ｂ）は５００ｍｍで形成し、さらにタワー部（４）の頂上部（３３）からタワー底部（３９）までのタワー部高さ（Ｃ）は９７ｍで形成し、タワー部（４）の下部は各階の高さが共に５ｍで形成した４層構造の建屋（５）で構成し、さらにタワー部（４）の底部のタワー底部スラブ厚さ（Ｄ）は１ｍで形成し、タワー部（４）の下部のタワー部土台直径（Ｓ）を直径２５ｍの円形で形成したタワー部（４）と、水中に配置する浮力体部（８）は概ね円筒形で鉄筋コンクリート構造で構築すると共に、浮体式洋上風力発電所（１）を洋上に浮かべる浮体としての役目を果たすため内部を空洞で構成し、前記浮力体 部（８）の鉄筋コンクリートの外周面、上下面の外皮の厚さは、上部、下部、外周面共に全て２００ｍｍで形成し、さらに浮力体部（８）の前後底部は前方向と後方向に向けて傾斜させた形状で形成し、さらに浮力体部（８）の浮力体部直径（Ｎ）は１００ｍの円筒形で形成し、さらに浮力体部（８）の前方傾斜部（３１）と後方傾斜部（３２）を除く浮力体部高さ（Ｊ）は１０ｍで形成し、さらに浮力体部（８）の前方向と後方向の前方傾斜部（３１）と後方傾斜部（３２）の前方傾斜部先端部高さ（Ｋ）と、後方傾斜部後端部高さ（Ｒ）は共に３ｍで形成し、さらに前方傾斜部（３１）と後方傾斜部（３２）の前方傾斜部角度（Ｍ）、後方傾斜部角度（Ｐ）は底面に対して共に１４度で形成し、前記前方傾斜部（３１）の前方傾斜部最大巾（Ｌ）と、前記後方傾斜部（３２）の後方傾斜部最大巾（Ｑ）は共に１２ｍで形成し、さらに浮力体部（８）の側面には、６本の係留ワイヤー（Ａ）（１１）、係留ワイヤー（Ｂ）（１２）、係留ワイヤー（Ｃ）（１３）、係留ワイヤー（Ｄ）（１４）、係留ワイヤー（Ｅ）（１５）、係留ワイヤー（Ｆ）（１６）を浮力体部（８）の側面の定位置でガイドさせるため、半径３０ｃｍで概ね半円筒状に形成した６か所の係留ワイヤー用ガイド穴（Ａ）（２５）、係留ワイヤー用ガイド穴（Ｂ）（２６）、係留ワイヤー用ガイド穴（Ｃ）（２７）、係留ワイヤー用ガイド穴（Ｄ）（２８）、係留ワイヤー用ガイド穴（Ｅ）（２９）、係留ワイヤー用ガイド穴（Ｆ）（３０）を、浮力体部（８）の上面の水平面で見たときに中心から６０度ごとに放射状に延設した浮力体部（８）の側面の位置に縦形に形成した浮力体部（８）と、海面の波浪による抵抗を最小限に抑え、浮体式洋上風力発電所（１）の揺れを抑えるため、タワー部（４）と浮力体部（８）を連結するための８本の支柱（６）は共に直径２ｍ、肉厚３０ｍｍ、長さ１０ｍの円筒状の鋼管で形成され、浮力体部（８）の上面の中心から半径１０５０ｃｍの円周上の、水平面で見たときに中心から４５度ごとに放射状に延節された位置に８本の支柱（Ａ）（４５）、支柱（Ｂ）（４６）、支柱（Ｃ）（４７）、支柱（Ｄ）（４８）、支柱（Ｅ）（４９）、支柱（Ｆ）（５０）、支柱（Ｇ）（５１）、支柱（Ｈ）（５２）の中心が位置するように垂直に取り付けられると共に、８本の支柱（Ａ）（４５）、支柱（Ｂ）（４６）、支柱（Ｃ）（４７）、支柱（Ｄ）（４８）、支柱（Ｅ）（４９）、支柱（Ｆ）（５０）、支柱（Ｇ）（５１）、支柱（Ｈ）（５２）の上部を、タワー底部（３９）の下面に取り付けた支柱（６）と、タワー部（４）の概ね頂上部（３３）からタワー底部（３９）を貫通し、浮力体部（８）の中心部の概ね底部まで、直径４ｍの円筒形で形成した竪穴区画（３４）と、浮体式洋上風力発電所（１）をＴＬＰ型で海底（９）に係留させるため、海底（９）に固定した６基の海底基礎杭（Ａ）（１７）、海底基礎杭（Ｂ）（１８）、海底基礎杭（Ｃ）（１９）、海底基礎杭（Ｄ）（２０）、海底基礎杭（Ｅ）（２１）、海底基礎杭（Ｆ）（２２）に対して、それぞれ６本の係留ワイヤー（Ａ）（１１）、係留ワイヤー（Ｂ）（１２）、係留ワイヤー（Ｃ）（１３）、係留ワイヤー（Ｄ）（１４）、係留ワイヤー（Ｅ）（１５）、係留ワイヤー（Ｆ）（１６）を取り付け、海面（７）の位置が支柱（６）の概ね上下中央位置になるように６本の係留ワイヤー（Ａ）（１１）、係留ワイヤー（Ｂ）（１２）、係留ワイヤー（Ｃ）（１３）、係留ワイヤー（Ｄ）（１４）、係留ワイヤー（Ｅ）（１５）、係留ワイヤー （Ｆ）（１６）を個々に巻取り・送出しするためのワイヤー巻取り・送出し機（６０）を建屋１階（３８）の内部の竪穴区画（３４）の側面近傍の円周上に均等に割り当て配置し、前記浮力体部（８）の側面に形成した係留ワイヤー用ガイド穴を経由させた係留ワイヤーの一端を、ワイヤー用滑車を介して前記タワー部（４）の建屋内に引き込み、個々の係留ワイヤーの長さを調節して浮力体部（８）を海面（７）に対して水平を保つように強制的に水没させることにより、浮体式洋上風力発電所（１）が海面（７）に対して縦揺れ、横揺れを小さく抑え水平状態を維持するように構成したことにより、超高層ビル等の建築工事で培った技術を活用し、製作日数を大幅に短縮すると共に、建築コストを下げることが可能になった。 According to the invention described in claim 1, in a floating offshore wind power plant consisting of a tower supporting a nacelle containing multiple blades, a speed increaser and a generator, the tower section (4) to be placed offshore is constructed of a generally conical reinforced concrete structure, the top section (33) is formed as a circular plane, a steel pipe (23) for attaching the nacelle is attached to the top section (33), the upper diameter (A) of the tower section of the top section (33) is formed as a circle of 5m, the upper slab thickness (B) of the tower section of the top section (33) is formed as 500mm, the height (C) of the tower section (4) from the top section (33) to the bottom section (39) is formed as 97m, and the lower part of the tower section (4) is the height of each floor The structure consists of a four-story building (5) with a height of 5m, and the bottom of the tower section (4) has a tower base slab thickness (D) of 1m, and the lower part of the tower section (4) has a tower base diameter (S) of a circle with a diameter of 25m. The buoyancy body section (8) placed in the water is generally cylindrical and constructed of reinforced concrete, and is hollow inside to serve as a floating body that will keep the floating offshore wind power plant (1) afloat on the ocean. The thickness of the outer skin of the buoyancy body section (8) is 200mm on the outer surface, top and bottom surfaces of the reinforced concrete, and the front and rear bottoms of the buoyancy body section (8) are formed in a shape that slopes forward and backward. The buoyancy body (8) is formed in a cylindrical shape with a diameter (N) of 100 m, and the height (J) of the buoyancy body (8), excluding the forward inclined section (31) and the rear inclined section (32), is formed to be 10 m, and the height (K) of the front inclined tip and the height (R) of the rear inclined end of the forward inclined section (31) and rear inclined section (32) of the buoyancy body (8) are both formed to be 3 m, and the angle (M) of the forward inclined section (31) and the angle (P) of the rear inclined section (32) are both formed to be 14 degrees with respect to the bottom surface, and the maximum width (L) of the forward inclined section (31) and the maximum width (Q) of the rear inclined section (32) are both formed to be 12 m, and further the buoyancy body ( 8) On the side of the buoyancy body (8), in order to guide the six mooring wires (A) (11), mooring wire (B) (12), mooring wire (C) (13), mooring wire (D) (14), mooring wire (E) (15), and mooring wire (F) (16) to their fixed positions on the side of the buoyancy body (8), six guide holes for mooring wires (A) (25), mooring wire guide holes (B) (26), mooring wire guide holes (C) (27), mooring wire guide holes (D) (28), mooring wire guide holes (E) (29), and mooring wire guide holes (F) (30), which are formed in a roughly semi-cylindrical shape with a radius of 30 cm, are radiated from the center at 60-degree intervals when viewed on the horizontal plane of the upper surface of the buoyancy body (8). The buoyancy body section (8) extends vertically to the side of the buoyancy body section (8), and eight support columns (6) connecting the tower section (4) and the buoyancy body section (8) are both formed from cylindrical steel pipes with a diameter of 2 m, a wall thickness of 30 mm, and a length of 10 m, in order to minimize resistance from waves on the sea surface and suppress the swaying of the floating offshore wind power plant (1). The centers of the eight support columns (A) (45), (B) (46), (C) (47), (D) (48), (E) (49), (F) (50), (G) (51), and (H) (52) are located at positions that radiate outwards at 45-degree intervals from the center of the center on a circle with a radius of 1050 cm from the center when viewed in the horizontal plane. ) (17), seabed foundation piles (17), seabed foundation piles (18), seabed foundation piles (19), and seabed foundation piles (19) are fixed to the seabed (9) in order to moor the floating offshore wind power plant (1) to the seabed (9) in a TLP (Terrestrial Landing Platform) manner. The upper parts of the eight pillars (A) (45), pillars (B) (46), pillars (C) (47), pillars (D) (48), pillars (E) (49), pillars (F) (50), pillars (G) (51), and pillars (H) (52) are attached to the lower surface of the tower base (39). A vertical shaft compartment (34) is formed in a cylindrical shape with a diameter of 4m, penetrating from approximately the top (33) of the tower section (4) through the tower base (39) to approximately the bottom of the central part of the buoyancy body section (8). Six seabed foundation piles (A) (17), seabed foundation piles (B) (18), and seabed foundation piles (C) (19) are fixed to the seabed (9). ), six mooring wires (A) (11), mooring wires (B) (12), mooring wires (C) (13), mooring wires (D) (14), mooring wires (E) (15), and mooring wires (F) (16) are attached to the seabed foundation piles (D) (20), seabed foundation piles (E) (21), and seabed foundation piles (F) (22), respectively, and a wire winding and releasing machine (60) is used to individually wind and release the six mooring wires (A) (11), mooring wires (B) (12), mooring wires (C) (13), mooring wires (D) (14), mooring wires (E) (15), and mooring wires (F) (16) so that the position of the sea surface (7) is approximately in the vertical center of the support pillars (6). The floating offshore wind power plant (1) is configured to minimize vertical and horizontal swaying relative to the sea surface (7) and maintain a horizontal state. This configuration utilizes technology cultivated in the construction of skyscrapers and other buildings, significantly reducing the manufacturing time and lowering construction costs.
以下、この発明の実施の形態について説明する。Embodiments of this invention will be described below.
図１乃至図７には、この発明の実施の形態を示す。Figures 1 to 7 show embodiments of this invention.
図１は、本発明の浮体式洋上風力発電所１を洋上に設置した状態を斜視図で示す。浮体式洋上風力発電所１はハブ１０に取り付けた長さ約８０ｍの３本のブレード２と、ナセル３の内部に設置した増速機、発電機、ヨー制御装置等と、さらに前記ナセル３をタワー部４に固定するための鋼管２３と、鉄筋コンクリート構造で構築したタワー部４と、さらにタワー部４と浮力体部８を連結させるため直径約２ｍ、肉厚約３０ｍｍ、長さ約１０ｍの鋼管で成形した８本の支柱６と、さらに浮体式洋上風力発電所１を洋上に浮かべて自立させ、浮体構造部としての役目をはたすため鉄筋コンクリート構造で内部を空洞で形成した浮力体部８で構成され、このように構成した浮力体部８の動揺量を極力抑えるようにＴＬＰ型で海底９に係留させるため６本の係留ワイヤー（Ａ）１１、係留ワイヤー（Ｂ）１２、係留ワイヤー（Ｃ）１３、係留ワイヤー（Ｄ）１４、係留ワイヤー（Ｅ）１５、係留ワイヤー（Ｆ）１６と、前記６本の係留ワイヤー（Ａ）１１、係留ワイヤー（Ｂ）１２、係留ワイヤー（Ｃ）１３、係留ワイヤー（Ｄ）１４、係留ワイヤー（Ｅ）１５、係留ワイヤー（Ｆ）１６を海底９に固定するため、海底９に固定した６基の海底基礎杭（Ａ）１７、海底基礎杭（Ｂ）１８、海底基礎杭（Ｃ）１９、海底基礎杭（Ｄ）２０、海底基礎杭（Ｅ）２１、海底基礎杭（Ｆ）２２で構成される。このように構成した浮体式洋上風力発電所１で発電した電気は、海底９に敷設した海底用送電ケーブル２４を経由して陸上開閉所（図示せず）に送られたのち陸上の概在系統の送電線に接続される。なお、鋼管２３に取り付けるナセル３は風の吹いてくる方向に対して常にブレード２を対峙させる必要があるため、ナセル３の内部には鋼管２３に対して３６０度回動自在に回転させることが出来るようにヨー制御装置（図示せず）が取り付けられる。Figure 1 is a perspective view showing the floating offshore wind power plant 1 of the present invention installed offshore. The floating offshore wind power plant 1 consists of three blades 2, each approximately 80 m long, attached to a hub 10, a speed increaser, generator, yaw control device, etc., installed inside a nacelle 3, a steel pipe 23 for fixing the nacelle 3 to the tower section 4, a tower section 4 constructed of reinforced concrete, eight support columns 6 formed from steel pipes approximately 2 m in diameter, 30 mm thick, and 10 m long to connect the tower section 4 and the buoyancy section 8, and a buoyancy section 8, which is made of reinforced concrete with a hollow interior, to float the floating offshore wind power plant 1 on the sea and make it self-supporting, and the amount of oscillation of the buoyancy section 8 configured in this way To minimize wobbling, the TLP type is used to moor the vessel to the seabed 9, and it consists of six mooring wires (A) 11, mooring wire (B) 12, mooring wire (C) 13, mooring wire (D) 14, mooring wire (E) 15, and mooring wire (F) 16, and to fix the six mooring wires (A) 11, mooring wire (B) 12, mooring wire (C) 13, mooring wire (D) 14, mooring wire (E) 15, and mooring wire (F) 16 to the seabed 9, it consists of six seabed foundation piles (A) 17, seabed foundation pile (B) 18, seabed foundation pile (C) 19, seabed foundation pile (D) 20, seabed foundation pile (E) 21, and seabed foundation pile (F) 22 fixed to the seabed 9. The electricity generated by the floating offshore wind power plant 1 configured in this way is sent to a land-based switch station (not shown) via a submarine transmission cable 24 laid on the seabed 9, and then connected to the existing land-based power transmission lines. Since the nacelle 3 attached to the steel pipe 23 needs to always face the direction of the wind, a yaw control device (not shown) is installed inside the nacelle 3 so that it can rotate 360 degrees relative to the steel pipe 23.
図２は、図１で説明した浮体式洋上風力発電所１を正面図で示す。本発明では浮体式洋上風力発電所１をＴＬＰ型で海底９に係留させるため、海底９に固定した６基の海底基礎杭（Ａ）１７、海底基礎杭（Ｂ）１８、海底基礎杭（Ｃ）１９、海底基礎杭（Ｄ）２０、海底基礎杭（Ｅ）２１、海底基礎杭（Ｆ）２２に対して、それぞれ６本の係留ワイヤー（Ａ）１１、係留ワイヤー（Ｂ）１２、係留ワイヤー（Ｃ）１３、係留ワイヤー（Ｄ）１４、係留ワイヤー（Ｅ）１５、係留ワイヤー（Ｆ）１６を取り付け、海面７の位置が支柱６の概ね上下中央位置になるように６本の係留ワイヤー（Ａ）１１、係留ワイヤー（Ｂ）１２、係留ワイヤー（Ｃ）１３、係留ワイヤー（Ｄ）１４、係留ワイヤー（Ｅ）１５、係留ワイヤー（Ｆ）１６の長さを、図７で説明するワイヤー用滑車（Ｂ）６２、ワイヤー用滑車（Ａ）６１、ワイヤー巻取り・送出し機６０により個々の係留ワイヤーの長さを調節して、浮力体部８を海面７に対して水平を保つように強制的に水没させることにより浮体式洋上風力発電所１が海面７に対して縦揺れ、横揺れを小さく抑え水平状態を維持することが可能となり、風に対して安定した状態でブレード２を回転させることが可能になった。Figure 2 shows a front view of the floating offshore wind power plant 1 described in Figure 1. In this invention, the floating offshore wind power plant 1 is moored to the seabed 9 in a TLP (Top Loading) type configuration. Six mooring wires (A) 11, (B) 12, (C) 19, (D) 20, (E) 21, and (F) 22 are fixed to the seabed 9, and six mooring wires (A) 11, (B) 12, (C) 13, (D) 14, (E) 15, and (F) 16 are attached to each of the six seabed foundation piles (A) 17, (B) 18, (C) 19, (D) 20, (E) 21, and (F) 22 respectively, and the position of the sea surface 7 is approximately in the vertical center of the support pillars 6. - By adjusting the lengths of each mooring wire (B) 12, mooring wire (C) 13, mooring wire (D) 14, mooring wire (E) 15, and mooring wire (F) 16 using the wire pulley (B) 62, wire pulley (A) 61, and wire winding/feeding machine 60 described in Figure 7, the buoyancy body 8 is forcibly submerged in the water to maintain a horizontal position relative to the sea surface 7. This makes it possible to minimize vertical and horizontal swaying relative to the sea surface 7 and maintain a horizontal state, allowing the blades 2 to rotate in a stable state relative to the wind.
図３は、図１、図２で説明したタワー部４と支柱６と浮力体部８を図３ａの平面図と、図３ｂの正面図で示す。タワー部４は概ね円錐形の鉄筋コンクリート構造で構築され、頂上部３３は、図６のタワー部上部直径Ａで示すように直径約５ｍの円形で形成され、タワー部上部スラブ厚さＢの厚さは約５００ｍｍ、タワー部４の頂上部３３からタワー底部３９までのタワー部高さＣは約９７ｍ、タワー部４のタワー部土台４０を構成するタワー底部スラブ厚さＤは約１ｍ、タワー部土台４０を構成するタワー部土台直径Ｓは円形で直径は約２５ｍ、タワー部４の下部には、各階の高さが共に約５ｍで形成された４層構造（建屋１階３８、建屋２階３７、建屋３階３６、建屋４階３５で示す）の建屋５が構築される。浮力体部８は概ね円筒形で、浮体式洋上風力発電所１を洋上に浮かべる浮体としての役目を果たすため内部を空洞で構成し、図６で示すように浮力体部８の浮力体部直径Ｎは約１００ｍ、浮力体部高さＪは約１０ｍで形成され、さらに図３で示すように浮力体部８の底面の前後に、陸地で構築した浮体式洋上風力発電所１を安定した状態で水上に浮かべるため、前方向と後方向の両方向の底部を、前方傾斜部３１（底部と前方傾斜部３１との境目を図３ａの一点鎖線（Ａ）４１で示す）と、後方傾斜部３２（底部と後方傾斜部３２の境目を図３ａの一点鎖線（Ｂ）４２で示す）で示すように先端部と後端部に向けて、図６の前方傾斜部角度Ｍと、後方傾斜部角度Ｒで示すように共に約１４度の角度で傾斜させた状態で形成し、さらにタワー部４と浮力体部８を直径約２ｍ、肉厚約３０ｍｍ、長さ約１０ｍの鋼管で成形した８本の支柱６で連結した状態を示す。Figure 3 shows the tower section 4, support columns 6, and buoyancy body section 8 described in Figures 1 and 2 in a plan view (Figure 3a) and a front view (Figure 3b). The tower section 4 is constructed of a generally conical reinforced concrete structure, and the top section 33 is formed as a circle with a diameter of approximately 5 m, as shown by the tower section top diameter A in Figure 6. The thickness of the tower section top slab B is approximately 500 mm, the height of the tower section C from the top section 33 to the tower base 39 is approximately 97 m, the thickness of the tower base slab D that constitutes the tower section base 40 of the tower section 4 is approximately 1 m, and the diameter S of the tower section base that constitutes the tower section base 40 is circular with a diameter of approximately 25 m. Below the tower section 4, a building 5 is constructed with a four-story structure (shown as building 1st floor 38, building 2nd floor 37, building 3rd floor 36, and building 4th floor 35) with each floor having a height of approximately 5 m. The buoyancy body 8 is generally cylindrical and has a hollow interior to serve as a floating structure for the floating offshore wind power plant 1 to float on the ocean. As shown in Figure 6, the buoyancy body 8 has a diameter N of approximately 100 m and a height J of approximately 10 m. Furthermore, as shown in Figure 3, the bottom surface of the buoyancy body 8 has forward-sloping sections 31 (bottom and forward slope) at both the front and rear ends to ensure that the floating offshore wind power plant 1, constructed on land, floats stably on the water. The structure is formed with the front and rear ends inclined at angles of approximately 14 degrees, as shown by the forward inclination angle M and the rear inclination angle R in Figure 6, as indicated by the forward inclination angle M and the rear inclination angle R in Figure 6, respectively, as shown by the dashed line (A) 41 in Figure 3a, which marks the boundary with section 31, and the dashed line (B) 42 in Figure 3a. Furthermore, the tower section 4 and the buoyancy section 8 are connected by eight support columns 6 formed from steel pipes with a diameter of approximately 2 m, a wall thickness of approximately 30 mm, and a length of approximately 10 m.
さらに浮力体部８の側面には、図１、図２で説明した６本の係留ワイヤー（Ａ）１１、係留ワイヤー（Ｂ）１２、係留ワイヤー（Ｃ）１３、係留ワイヤー（Ｄ）１４、係留ワイヤー（Ｅ）１５、係留ワイヤー（Ｆ）１６を、浮力体部８の側面の定位置でガイドさせるため、半径約３０ｃｍで概ね半円筒状（かまぼこ状）に形成した６か所の係留ワイヤー用ガイド穴（Ａ）２５、係留ワイヤー用ガイド穴（Ｂ）２６、係留ワイヤー用ガイド穴（Ｃ）２７、係留ワイヤー用ガイド穴（Ｄ）２８、係留ワイヤー用ガイド穴（Ｅ）２９、係留ワイヤー用ガイド穴（Ｆ）３０が、浮力体部８の上面の水平面で見たときに中心から６０度ごとに放射状に延設された浮力体部８の側面の位置に縦形に形成される。Furthermore, on the side surface of the buoyancy body 8, in order to guide the six mooring wires (A) 11, mooring wire (B) 12, mooring wire (C) 13, mooring wire (D) 14, mooring wire (E) 15, and mooring wire (F) 16, as described in Figures 1 and 2, to their fixed positions on the side surface of the buoyancy body 8, six mooring wire guide holes (A) 25, mooring wire guide hole (B) 26, mooring wire guide hole (C) 27, mooring wire guide hole (D) 28, mooring wire guide hole (E) 29, and mooring wire guide hole (F) 30, which are roughly semi-cylindrical (semi-circular) with a radius of approximately 30 cm, are formed vertically on the side surface of the buoyancy body 8, extending radially from the center at 60-degree intervals when viewed from the horizontal plane of the upper surface of the buoyancy body 8.
さらにタワー部４の概ね頂上部３３からタワー底部３９を貫通し、浮力体部８の中心部の概ね底部まで、一点鎖線（Ｃ）４３で示すように概ね直径約４ｍの円筒形で形成した竪穴区画３４を構築し、さらに竪穴区画３４の内部に点検作業を行うための上下移動用階段（図示せず）と簡易リフト（図示せず）を取り付けることにより作業効率を上げることが可能になった。Furthermore, a vertical shaft compartment 34, formed in the shape of a cylinder with a diameter of approximately 4 m, is constructed, extending from approximately the top 33 of the tower section 4 through the bottom 39 of the tower and to approximately the bottom of the central part of the buoyancy body section 8, as shown by the dashed line (C) 43. By installing stairs (not shown) and a simple lift (not shown) for vertical movement to perform inspection work inside the vertical shaft compartment 34, it is possible to increase work efficiency.
図４は、図１、図２で説明した支柱６と浮力体部８を図４ａの平面図と、図４ｂの正面図で示す。浮力体部８の外周部に形成した６か所の係留ワイヤー用ガイド穴（Ａ）２５、係留ワイヤー用ガイド穴（Ｂ）２６、係留ワイヤー用ガイド穴（Ｃ）２７、係留ワイヤー用ガイド穴（Ｄ）２８、係留ワイヤー用ガイド穴（Ｅ）２９、係留ワイヤー用ガイド穴（Ｆ）３０は、浮力体部８の上面の水平面で見たときに中心部から６０度ごとに放射状に延設された浮力体部８の側面の位置に縦形に形成され、係留ワイヤー用ガイド穴（Ａ）２５、係留ワイヤー用ガイド穴（Ｂ）２６、係留ワイヤー用ガイド穴（Ｃ）２７、係留ワイヤー用ガイド穴（Ｄ）２８、係留ワイヤー用ガイド穴（Ｅ）２９、係留ワイヤー用ガイド穴（Ｆ）３０の形状は、全て、半径約３０ｃｍで概ね半円筒状（かまぼこ状）に形成される。Figure 4 shows the support column 6 and buoyancy body 8 described in Figures 1 and 2, in a plan view (Figure 4a) and a front view (Figure 4b). The six mooring wire guide holes (A) 25, (B) 26, (C) 27, (D) 28, (E) 29, and (F) 30 formed on the outer circumference of the buoyancy body 8 are formed vertically on the side surfaces of the buoyancy body 8, extending radially from the center at 60-degree intervals when viewed on the horizontal plane of the upper surface of the buoyancy body 8. The shape of the mooring wire guide holes (A) 25, (B) 26, (C) 27, (D) 28, (E) 29, and (F) 30 is generally semi-cylindrical (semi-circular) with a radius of approximately 30 cm.
さらにタワー部４と浮力体部８を連結するための８本の支柱６は共に直径約２ｍ、肉厚３０ｍｍ、長さ１０ｍの円筒状の鋼管で形成され、浮力体部８の上面の中心から半径約１０５０ｃｍの円周上の、水平面で見たときに中心から４５度ごとに放射状に延節された位置に８本の支柱（Ａ）４５、支柱（Ｂ）４６、支柱（Ｃ）４７、支柱（Ｄ）４８、支柱（Ｅ）４９、支柱（Ｆ）５０、支柱（Ｇ）５１、支柱（Ｈ）５２の中心が位置するように垂直に取り付けられると共に、８本の支柱（Ａ）４５、支柱（Ｂ）４６、支柱（Ｃ）４７、支柱（Ｄ）４８、支柱（Ｅ）４９、支柱（Ｆ）５０、支柱（Ｇ）５１、支柱（Ｈ）５２の上部は、図３で説明したタワー底部３９の下面に取り付けられる。このようにタワー部４と、浮力体部８を８本の支柱６で連結する理由は、円筒形の丸い支柱でタワー部４を支えることにより、海面の波浪による抵抗を最小限に抑え、浮体式洋上風力発電所１の揺れを抑えるためである。 Furthermore, the eight support columns 6 for connecting the tower section 4 and the buoyancy section 8 are all made of cylindrical steel pipes with a diameter of approximately 2 m, a wall thickness of 30 mm, and a length of 10 m. They are vertically mounted so that the centers of the eight support columns (A) 45, (B) 46, (C) 47, (D) 48, (E) 49, (F) 50, (G) 51, and (H) 52 are located at positions that radiate outwards from the center at 45-degree intervals when viewed in the horizontal plane, on a circumference with a radius of approximately 1050 cm from the center of the upper surface of the buoyancy section 8. The upper parts of the eight support columns (A) 45, (B) 46, (C) 47, (D) 48, (E) 49, (F) 50, (G) 51, and (H) 52 are attached to the lower surface of the tower base 39 as described in Figure 3. The reason for connecting the tower section 4 and the buoyancy section 8 with eight support columns 6 is to minimize resistance from waves on the sea surface by supporting the tower section 4 with cylindrical support columns, thereby suppressing the swaying of the floating offshore wind power plant 1.
図５は、図１、図２で説明した浮力体部８を海底９に係留するための６本の係留ワイヤー（Ａ）１１、係留ワイヤー（Ｂ）１２、係留ワイヤー（Ｃ）１３、係留ワイヤー（Ｄ）１４、係留ワイヤー（Ｅ）１５、係留ワイヤー（Ｆ）１６を、図５ａの平面図と図５ｂの正面図で示す。６本の係留ワイヤー（Ａ）１１、係留ワイヤー（Ｂ）１２、係留ワイヤー（Ｃ）１３、係留ワイヤー（Ｄ）１４、係留ワイヤー（Ｅ）１５、係留ワイヤー（Ｆ）１６を、浮力体部８の側面に縦形で形成した６か所の係留ワイヤー用ガイド穴（Ａ）２５、係留ワイヤー用ガイド穴（Ｂ）２６、係留ワイヤー用ガイド穴（Ｃ）２７、係留ワイヤー用ガイド穴（Ｄ）２８、係留ワイヤー用ガイド穴（Ｅ）２９、係留ワイヤー用ガイド穴（Ｆ）３０を介して、個々の係留ワイヤー毎に、図７で示すワイヤー用滑車（Ｂ）６２と、ワイヤー用滑車（Ａ）６１と、ワイヤー巻取り・送出し機６０で、図２で説明した海面７が支柱６の概ね上下中央位置になるように長さを調整することによりに、浮体式洋上風力発電所１の水平状態も容易に維持することが出来るようになった。なお、６か所の係留ワイヤー用ガイド穴（Ａ）２５、係留ワイヤー用ガイド穴（Ｂ）２６、係留ワイヤー用ガイド穴（Ｃ）２７、係留ワイヤー用ガイド穴（Ｄ）２８、係留ワイヤー用ガイド穴（Ｅ）２９、係留ワイヤー用ガイド穴（Ｆ）３０と、６基の海底基礎杭（Ａ）１７、海底基礎杭（Ｂ）１８、海底基礎杭（Ｃ）１９、海底基礎杭（Ｄ）２０、海底基礎杭（Ｅ）２１、海底基礎杭（Ｆ）２２との位置関係は、海流と、波による浮力体部８の動揺量を極力抑えるため６か所の係留ワイヤー用ガイド穴（Ａ）２５、係留ワイヤー用ガイド穴（Ｂ）２６、係留ワイヤー用ガイド穴（Ｃ）２７、係留ワイヤー用ガイド穴（Ｄ）２８、係留ワイヤー用ガイド穴（Ｅ）２９、係留ワイヤー用ガイド穴（Ｆ）３０の直下の海底に、６基の海底基礎杭（Ａ）１７、海底基礎杭（Ｂ）１８、海底基礎杭（Ｃ）１９、海底基礎杭（Ｄ）２０、海底基礎杭（Ｅ）２１、海底基礎杭（Ｆ）２２を固定させることにより、ＴＬＰ型の特徴の１つである海面下での占有面積を抑えることが可能になった。Figure 5 shows the six mooring wires (A) 11, mooring wire (B) 12, mooring wire (C) 13, mooring wire (D) 14, mooring wire (E) 15, and mooring wire (F) 16 used to moor the buoyancy body 8 described in Figures 1 and 2 to the seabed 9, in a plan view (Figure 5a) and a front view (Figure 5b). Six mooring wires (A) 11, mooring wire (B) 12, mooring wire (C) 13, mooring wire (D) 14, mooring wire (E) 15, and mooring wire (F) 16 are connected via six mooring wire guide holes (A) 25, mooring wire guide hole (B) 26, mooring wire guide hole (C) 27, mooring wire guide hole (D) 28, mooring wire guide hole (E) 29, and mooring wire guide hole (F) 30 formed vertically on the side surface of the buoyancy body 8. By adjusting the length of each individual mooring wire using the wire pulley (B) 62, wire pulley (A) 61, and wire winding/feeding machine 60 shown in Figure 7, so that the sea surface 7 explained in Figure 2 is approximately in the vertical center of the support column 6, the floating offshore wind power plant 1 can be easily maintained in a horizontal position. The positional relationship between the six mooring wire guide holes (A) 25, (B) 26, (C) 27, (D) 28, (E) 29, and (F) 30 and the six seabed foundation piles (A) 17, (B) 18, (C) 19, (D) 20, (E) 21, and (F) 22 is such that the amount of movement of the buoyancy body 8 due to ocean currents and waves is minimized. By fixing six seabed foundation piles (A) 17, seabed foundation pile (B) 18, seabed foundation pile (C) 19, seabed foundation pile (D) 20, seabed foundation pile (E) 21, and seabed foundation pile (F) 22 directly below the guide holes (A) 25, (B) 26, (C) 27, (D) 28, (E) 29, and (F) 30 on the seabed, it became possible to reduce the area occupied below sea surface, which is one of the characteristics of the TLP type.
図６は、図１、図２で説明したタワー部４、支柱６、浮力体部８の部材の寸法、角度をＡ～Ｓの記号で示す。タワー部４は概ね円錐形で、頂上部３３は円形をした平面で形成され、頂上部３３のタワー部上部直径Ａの直径は約５ｍの円形で形成し、さらに頂上部３３のタワー部上部スラブ厚さＢは約５００ｍｍで形成し、さらに一点鎖線（Ｃ）４３で示すように竪穴区画３４はタワー部３３の概ね上端部からタワー部土台４０を貫通させ浮力体部８の概ね下端部まで概ね直径約４ｍ、長さ約１１６．３ｍの円筒形で形成される。さらにタワー部４の頂上部３３からタワー底部３９までのタワー部高さＣは約９７ｍで形成し、さらに４階建ての建屋５の、建屋４階高さＦは約５ｍ、建屋３階高さＧは約５ｍ、建屋２階高さＨは約５ｍ、建屋１階高さＩは約５ｍで形成し、さらにタワー部４の底部のタワー底部スラブ厚さＤは約１ｍで形成し、タワー部４の下部のタワー部土台直径Ｓは直径約２５ｍの円形で形成される。さらに８本の支柱６の支柱高さＥは全て約１０ｍで形成し、さらに鉄筋コンクリート構造で構築された浮力体部８の鉄筋コンクリートの外周面、上下面の外皮の厚さは、上部、下部、外周面共に全て約２００ｍｍで形成し、さらに浮力体部８の前後底部は前方向と後方向に向けて傾斜させた形状で形成し、さらに浮力体部８の浮力体部直径Ｎは約１００ｍの円筒形で形成し、さらに図３で説明した浮力体部８の前方傾斜部３１と後方傾斜部３２を除く浮力体部高さＪは約１０ｍで形成し、さらに図３で説明した浮力体部８の前方向と後方向の前方傾斜部３１と後方傾斜部３２の先端部の前方傾斜部先端部高さＫと、後方傾斜部後端部高さＲは共に約３ｍで形成し、さらに図３で説明した前方傾斜部３１と後方傾斜部３２の前方傾斜部角度Ｍ、後方傾斜部角度Ｐは底面に対して共に約１４度で形成し、前記前方傾斜部３１の前方傾斜部最大巾Ｌと、前記後方傾斜部３２の後方傾斜部最大巾Ｑは共に約１２ｍで形成される。このようにタワー部４の中心と、８本の支柱６の中心と、浮力体部８の中心を一直線状に構築することにより浮体式洋上風力発電所１の重心をタワー部４と浮力体部８の中心に位置させることが出来るようになり、浮体式洋上風力発電所１は海面に対してバランス良く水平状態を保つことが可能になった。Figure 6 shows the dimensions and angles of the members of the tower section 4, support column 6, and buoyancy body section 8 described in Figures 1 and 2, indicated by symbols A to S. The tower section 4 is generally conical in shape, and the top section 33 is formed as a circular plane. The diameter of the top section 33 is approximately 5 m, and the thickness B of the top section slab is approximately 500 mm. Furthermore, as shown by the dashed line (C) 43, the vertical shaft section 34 is formed as a cylindrical shape with a diameter of approximately 4 m and a length of approximately 116.3 m, extending from approximately the upper end of the tower section 33 through the tower base 40 to approximately the lower end of the buoyancy body section 8. Furthermore, the height C of the tower section 4, from the top 33 to the bottom 39, is approximately 97m. The four-story building 5 is formed with the height F of the fourth floor approximately 5m, the height G of the third floor approximately 5m, the height H of the second floor approximately 5m, and the height I of the first floor approximately 5m. The thickness D of the tower bottom slab at the base of the tower section 4 is approximately 1m. The diameter S of the tower base at the bottom of the tower section 4 is formed as a circle with a diameter of approximately 25m. Furthermore, the height E of all eight support columns 6 is approximately 10 m, and the thickness of the outer skin of the reinforced concrete outer surface and upper and lower surfaces of the buoyancy body 8, which is constructed of reinforced concrete, is approximately 200 mm for the upper, lower, and outer surfaces, and the front and rear bottoms of the buoyancy body 8 are formed in a shape that is inclined toward the front and rear, and the diameter N of the buoyancy body 8 is formed in a cylindrical shape of approximately 100 mm, and furthermore, the buoyancy body 8 excluding the forward inclined portion 31 and the rear inclined portion 32 as explained in Figure 3 The height J is approximately 10 m, and the height K of the front inclined tip and the height R of the rear inclined tip of the buoyancy body section 8, as explained in Figure 3, are both approximately 3 m. Furthermore, the angles M and P of the front inclined and rear inclined sections of the front inclined section 31 and rear inclined section 32, as explained in Figure 3, are both approximately 14 degrees with respect to the bottom surface, and the maximum width L of the front inclined section 31 and the maximum width Q of the rear inclined section 32 are both approximately 12 m. By constructing the center of the tower section 4, the centers of the eight support columns 6, and the center of the buoyancy body section 8 in a straight line in this way, the center of gravity of the floating offshore wind power plant 1 can be positioned at the center of the tower section 4 and the buoyancy body section 8, making it possible for the floating offshore wind power plant 1 to maintain a well-balanced horizontal state with respect to the sea surface.
図７は、図５で説明した６本の係留ワイヤー（Ａ）１１、係留ワイヤー（Ｂ）１２、係留ワイヤー（Ｃ）１３、係留ワイヤー（Ｄ）１４、係留ワイヤー（Ｅ）１５、係留ワイヤー（Ｆ）１６の内の１本の係留ワイヤー（Ｃ）１３を代表して、浮力体部８の係留ワイヤー用ガイド穴（Ｂ）２６を経由させワイヤー巻取り・送出し機６０に巻き付けた状態を部分断面図で示す。海底基礎杭（Ｃ）１９に取り付けた係留ワイヤー（Ｃ）１３は、図５で説明した浮力体部８の側面に形成した係留ワイヤー用ガイド穴（Ｂ）２６を経由し、浮力体部８の上面の係留ワイヤー用ガイド穴（Ｂ）２６の近傍に取り付けたワイヤー用滑車（Ｂ）６２と、さらに竪穴区画３４の外側近傍の浮力体部８の上面に取り付けたワイヤー用滑車（Ａ）６１を経由し、さらにワイヤー用滑車（Ａ）６１の直上のタワー部土台４０に貫通させたワイヤー通し穴６３を経由し、建屋１階３８の内部の竪穴区画３４の外側近傍に取り付けたワイヤー巻取り・送出し機６０に取り付けられる。このように構成した係留ワイヤー（Ｃ）１３をワイヤー巻取り・送出し機６０により巻取り、又は送出して長さ調整をすることにより、海面７に対する浮体式洋上風力発電所１の上下の高さと、浮力体部８の傾きを簡単に調整することが可能になった。このように６本の係留ワイヤー（Ａ）１１、係留ワイヤー（Ｂ）１２、係留ワイヤー（Ｃ）１３、係留ワイヤー（Ｄ）１４、係留ワイヤー（Ｅ）１５、係留ワイヤー（Ｆ）１６を個々に巻取り・送出しするためのワイヤー巻取り・送出し機６０を建屋１階３８の内部の竪穴区画３４の側面近傍の円周上に均等に割り当て配置することにより建屋１階３８の内部のスペースを効率良く活用すると共に、ワイヤー巻取り・送出し機６０のメンテナンスを合理的に行うことが可能になった。Figure 7 is a partial cross-sectional view showing one of the six mooring wires (A) 11, mooring wire (B) 12, mooring wire (C) 13, mooring wire (D) 14, mooring wire (E) 15, and mooring wire (F) 16 described in Figure 5, as a representative, wound onto the wire winding and releasing machine 60 via the mooring wire guide hole (B) 26 of the buoyancy body 8. The mooring wire (C) 13 attached to the seabed foundation pile (C) 19 passes through a guide hole (B) 26 for mooring wires formed on the side surface of the buoyancy body 8 as described in Figure 5, then through a wire pulley (B) 62 attached near the guide hole (B) 26 on the upper surface of the buoyancy body 8, and further through a wire pulley (A) 61 attached to the upper surface of the buoyancy body 8 near the outside of the vertical shaft compartment 34, and further through a wire passage hole 63 that penetrates the tower base 40 directly above the wire pulley (A) 61, and is attached to a wire winding and sending machine 60 attached near the outside of the vertical shaft compartment 34 inside the first floor 38 of the building. By winding or releasing the mooring wire (C) 13 configured in this way using the wire winding/releasing machine 60 to adjust its length, it becomes possible to easily adjust the vertical height of the floating offshore wind power plant 1 relative to the sea surface 7 and the inclination of the buoyancy body 8. By evenly distributing the wire winding/releasing machines 60 for individually winding and releasing the six mooring wires (A) 11, mooring wire (B) 12, mooring wire (C) 13, mooring wire (D) 14, mooring wire (E) 15, and mooring wire (F) 16 on the circumference near the side of the vertical shaft compartment 34 inside the first floor 38 of the building, the space inside the first floor 38 of the building can be used efficiently, and maintenance of the wire winding/releasing machines 60 can be performed rationally.
なお、図７においては、図１、図２で説明した係留ワイヤー（Ｃ）１３について説明したが、他の５本の係留ワイヤー（Ａ）１１、係留ワイヤー（Ｂ）１２、係留ワイヤー（Ｄ）１４、係留ワイヤー（Ｅ）１５、係留ワイヤー（Ｆ）１６についても、係留ワイヤー（Ｃ）１３と同様にワイヤー用滑車とワイヤー巻取り・送出し機を活用し、各々の係留ワイヤーの長さをワイヤー用滑車、ワイヤー巻取り・送出し機で長さ調整することにより浮体式洋上風力発電所１の水平状態を容易に保つことが出来るようになった。In addition, while Figure 7 describes the mooring wire (C) 13 as explained in Figures 1 and 2, the other five mooring wires (A) 11, (B) 12, (D) 14, (E) 15, and (F) 16 can also be easily maintained in a horizontal position by using wire pulleys and wire winding/feeding machines to adjust the length of each mooring wire, similar to mooring wire (C) 13.
以上、実施の形態に基づいて、本発明に係る浮体式洋上風力発電所について詳細に説明してきたが、本発明は、以上の実施の形態に限定されるものではなく、発明の趣旨を逸脱しない範囲において各種の改変をなしても、本発明の技術的範囲に属するのはもちろんである。Although the floating offshore wind power plant according to the present invention has been described in detail based on the embodiments described above, the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention, and will of course remain within the technical scope of the present invention.
図１、図２において、浮力体部８を海底９に係留させるため６本の係留ワイヤー（Ａ）１１、係留ワイヤー（Ｂ）１２、係留ワイヤー（Ｃ）１３、係留ワイヤー（Ｄ）１４、係留ワイヤー（Ｅ）１５、係留ワイヤー（Ｆ）１６と説明したが、６本の係留ワイヤーの種類は、ワイヤーロープに限定せず、合成繊維ロープ、鋼鉄製の鎖で構成することも、もちろん可能である。In Figures 1 and 2, six mooring wires (A) 11, (B) 12, (C) 13, (D) 14, (E) 15, and (F) 16 are described as being used to anchor the buoyancy body 8 to the seabed 9. However, the six mooring wires are not limited to wire ropes; they can, of course, also be made of synthetic fiber ropes or steel chains.
図１において、支柱６を直径約２ｍ、肉厚約３０ｍｍ、長さ約１０ｍの鋼管で成形したと説明したが、円筒形をした直径約２ｍ、筒の厚さ約２０ｃｍ、長さ約１０ｍの鉄筋コンクリート構造で形成することも、もちろん可能である。In Figure 1, it was explained that the support column 6 was formed from a steel pipe with a diameter of approximately 2 m, a wall thickness of approximately 30 mm, and a length of approximately 10 m. However, it is also possible to form it from a cylindrical reinforced concrete structure with a diameter of approximately 2 m, a thickness of approximately 20 cm, and a length of approximately 10 m.
図７において、「・・・このように構成した係留ワイヤー（Ｃ）１３をワイヤー巻取り・送り出し機６０により長さ調整をすることにより、海面７に対する浮体式洋上風力発電所１の上下高さと傾きを簡単に調整することが可能になった。」と説明したが。もちろん浮力体部８の内部に設置したバラスト水用タンク（図示せず）にバラスト水（海水）を注入、排出することにより浮力体部８の浮力を予定浮力になるように調整することも、もちろん可能である。In Figure 7, it was explained that "...by adjusting the length of the mooring wire (C) 13 configured in this way using the wire winding and releasing machine 60, it became possible to easily adjust the vertical height and inclination of the floating offshore wind power plant 1 relative to the sea surface 7." Of course, it is also possible to adjust the buoyancy of the buoyancy body 8 to the desired buoyancy by injecting and discharging ballast water (seawater) into and out of a ballast water tank (not shown) installed inside the buoyancy body 8.
Ａ タワー部上部直径
Ｂ タワー部上部スラブ厚さ
Ｃ タワー部高さ
Ｄ タワー底部スラブ厚さ
Ｅ 支柱高さ
Ｆ 建屋４階高さ
Ｇ 建屋３階高さ
Ｈ 建屋２階高さ
Ｉ 建屋１階高さ
Ｊ 浮力体部高さ
Ｋ 前方傾斜部先端部高さ
Ｌ 前方傾斜部最大幅
Ｍ 前方傾斜部角度
Ｎ 浮力体部直径
Ｐ 後方傾斜部角度
Ｑ 後方傾斜部最大幅
Ｒ 後方傾斜部後端部高さ
Ｓ タワー部土台直径
１ 浮体式洋上風力発電所
２ ブレード
３ ナセル
４ タワー部
５ 建屋
６ 支柱
７ 海面
８ 浮力体部
９ 海底
１０ ハブ
１１ 係留ワイヤー（Ａ）
１２ 係留ワイヤー（Ｂ）
１３ 係留ワイヤー（Ｃ）
１４ 係留ワイヤー（Ｄ）
１５ 係留ワイヤー（Ｅ）
１６ 係留ワイヤー（Ｆ）
１７ 海底基礎杭（Ａ）
１８ 海底基礎杭（Ｂ）
１９ 海底基礎杭（Ｃ）
２０ 海底基礎杭（Ｄ）
２１ 海底基礎杭（Ｅ）
２２ 海底基礎杭（Ｆ）
２３ 鋼管
２４ 海底用送電ケーブル
２５ 係留ワイヤー用ガイド穴（Ａ）
２６ 係留ワイヤー用ガイド穴（Ｂ）
２７ 係留ワイヤー用ガイド穴（Ｃ）
２８ 係留ワイヤー用ガイド穴（Ｄ）
２９ 係留ワイヤー用ガイド穴（Ｅ）
３０ 係留ワイヤー用ガイド穴（Ｆ）
３１ 前方傾斜部
３２ 後方傾斜部
３３ 頂上部
３４ 竪穴区画
３５ 建屋４階
３６ 建屋３階
３７ 建屋２階
３８ 建屋１階
３９ タワー底部
４０ タワー部土台
４１ 一点鎖線（Ａ）
４２ 一点鎖線（Ｂ）
４３ 一点鎖線（Ｃ）
４５ 支柱（Ａ）
４６ 支柱（Ｂ）
４７ 支柱（Ｃ）
４８ 支柱（Ｄ）
４９ 支柱（Ｅ）
５０ 支柱（Ｆ）
５１ 支柱（Ｇ）
５２ 支柱（Ｈ）
６０ ワイヤー巻取り・送出し機
６１ ワイヤー用滑車（Ａ）
６２ ワイヤー用滑車（Ｂ）
６３ ワイヤー通し穴A Tower section upper diameter B Tower section upper slab thickness C Tower section height D Tower base slab thickness E Support column height F Building 4th floor height G Building 3rd floor height H Building 2nd floor height I Building 1st floor height J Buoyancy body section height K Front inclined section tip height L Front inclined section maximum width M Front inclined section angle N Buoyancy body section diameter P Rear inclined section angle Q Rear inclined section maximum width R Rear inclined section rear end height S Tower section base diameter 1 Floating offshore wind power plant 2 Blades 3 Nacelle 4 Tower section 5 Building 6 Support column 7 Sea surface 8 Buoyancy body section 9 Seabed 10 Hub 11 Mooring wire (A)
12. Mooring wire (B)
13. Mooring wire (C)
14. Mooring wire (D)
15. Mooring wire (E)
16. Mooring wire (F)
17 Submarine foundation pile (A)
18 Submarine foundation pile (B)
19 Submarine foundation pile (C)
20 Submarine foundation pile (D)
21. Submarine foundation piles (E)
22 Submarine foundation pile (F)
23 Steel pipe 24 Submarine power transmission cable 25 Guide hole for mooring wire (A)
26 Guide hole for mooring wire (B)
27 Guide hole for mooring wire (C)
28 Guide hole for mooring wire (D)
29 Guide hole for mooring wire (E)
30 Guide hole for mooring wire (F)
31 Forward sloping section 32 Rearward sloping section 33 Top section 34 Vertical shaft section 35 Building 4th floor 36 Building 3rd floor 37 Building 2nd floor 38 Building 1st floor 39 Tower base 40 Tower foundation 41 Dash-dot line (A)
42 Dot-dashed line (B)
43 One-dot chain line (C)
45. Support post (A)
46 Pillar (B)
47 Pillar (C)
48 Pillar (D)
49 Pillar (E)
50 Pillar (F)
51 Pillar (G)
52 Pillar (H)
60 Wire winding and feeding machine 61 Wire pulley (A)
62. Wire pulley (B)
63 wire threading holes
Claims (1)
洋上に配置するタワー部（４）を概ね円錐形の鉄筋コンクリート構造で構築し、頂上部（３３）を円形状の平面で形成し、前記頂上部（３３）にナセルを取り付けるための鋼管（２３）を取り付け、前記頂上部（３３）のタワー部上部直径（Ａ）は５ｍの円形で形成し、さらに頂上部（３３）のタワー部上部スラブ厚さ（Ｂ）は５００ｍｍで形成し、さらにタワー部（４）の頂上部（３３）からタワー底部（３９）までのタワー部高さ（Ｃ）は９７ｍで形成し、タワー部（４）の下部は各階の高さが共に５ｍで形成した４層構造の建屋（５）で構成し、さらにタワー部（４）の底部のタワー底部スラブ厚さ（Ｄ）は１ｍで形成し、タワー部（４）の下部のタワー部土台直径（Ｓ）を直径２５ｍの円形で形成した タワー部（４）と、
水中に配置する浮力体部（８）は概ね円筒形で鉄筋コンクリート構造で構築すると共に、浮体式洋上風力発電所（１）を洋上に浮かべる浮体としての役目を果たすため内部を空洞で構成し、前記浮力体部（８）の鉄筋コンクリートの外周面、上下面の外皮の厚さは、上部、下部、外周面共に全て２００ｍｍで形成し、さらに浮力体部（８）の前後底部は前方向と後方向に向けて傾斜させた形状で形成し、さらに浮力体部（８）の浮力体部直径（Ｎ）は１００ｍの円筒形で形成し、さらに浮力体部（８）の前方傾斜部（３１）と後方傾斜部（３２）を除く浮力体部高さ（Ｊ）は１０ｍで形成し、さらに浮力体部（８）の前方向と後方向の前方傾斜部（３１）と後方傾斜部（３２）の前方傾斜部先端部高さ（Ｋ）と、後方傾斜部後端部高さ（Ｒ）は共に３ｍで形成し、さらに前方傾斜部（３１）と後方傾斜部（３２）の前方傾斜部角度（Ｍ）、後方傾斜部角度（Ｐ）は底面に対して共に１４度で形成し、前記前方傾斜部（３１）の前方傾斜部最大巾（Ｌ）と、前記後方傾斜部（３２）の後方傾斜部最大巾（Ｑ）は共に１２ｍで形成し、さらに浮力体部（８）の側面には、６本の係留ワイヤー（Ａ）（１１）、係留ワイヤー（Ｂ）（１２）、係留ワイヤー（Ｃ）（１３）、係留ワイヤー（Ｄ）（１４）、係留ワイヤー（Ｅ）（１５）、係留ワイヤー（Ｆ）（１６）を浮力体部（８）の側面の定位置でガイドさせるため、半径３０ｃｍで概ね半円筒状に形成した６か所の係留ワイヤー用ガイド穴（Ａ）（２５）、係留ワイヤー用ガイド穴（Ｂ）（２６）、係留ワイヤー用ガイド穴（Ｃ）（２７）、係留ワイヤー用ガイド穴（Ｄ）（２８）、係留ワイヤー用ガイド穴（Ｅ）（２９）、係留ワイヤー用ガイド穴（Ｆ）（３０）を、浮力体部（８）の上面の水平面で見たときに中心から６０度ごとに放射状に延設した浮力体部（８）の側面の位置に縦形に形成した浮力体部（８）と、
海面の波浪による抵抗を最小限に抑え、浮体式洋上風力発電所（１）の揺れを抑えるため、タワー部（４）と浮力体部（８）を連結するための８本の支柱（６）は共に直径２ｍ、肉厚３０ｍｍ、長さ１０ｍの円筒状の鋼管で形成され、浮力体部（８）の上面の中心から半径１０５０ｃｍの円周上の、水平面で見たときに中心から４５度ごとに放射状に延節された位置に８本の支柱（Ａ）（４５）、支柱（Ｂ）（４６）、支柱（Ｃ）（４７）、支柱（Ｄ）（４８）、支柱（Ｅ）（４９）、支柱（Ｆ）（５０）、支柱（Ｇ）（５１）、支柱（Ｈ）（５２）の中心が位置するように垂直に取り付けられると共に、８本の支柱（Ａ）（４５）、支柱（Ｂ）（４６）、支柱（Ｃ）（４７）、支柱（Ｄ）（４８）、支柱（Ｅ）（４９）、支柱（Ｆ）（５０）、支柱（Ｇ）（５１）、支柱（Ｈ）（５２）の上部を、タワー底部（３９）の下面に取り付けた支柱（６）と、
タワー部（４）の概ね頂上部（３３）からタワー底部（３９）を貫通し、浮力体部（８）の中心部の概ね底部まで、直径４ｍの円筒形で形成した竪穴区画（３４）と、
浮体式洋上風力発電所（１）をＴＬＰ型で海底（９）に係留させるため、海底（９）に固定した６基の海底基礎杭（Ａ）（１７）、海底基礎杭（Ｂ）（１８）、海底基礎杭（Ｃ）（１９）、海底基礎杭（Ｄ）（２０）、海底基礎杭（Ｅ）（２１）、海底基礎杭（Ｆ）（２２）に対 して、それぞれ６本の係留ワイヤー（Ａ）（１１）、係留ワイヤー（Ｂ）（１２）、係留ワイヤー（Ｃ）（１３）、係留ワイヤー（Ｄ）（１４）、係留ワイヤー（Ｅ）（１５）、係留ワイヤー（Ｆ）（１６）を取り付け、海面（７）の位置が支柱（６）の概ね上下中央位置になるように６本の係留ワイヤー（Ａ）（１１）、係留ワイヤー（Ｂ）（１２）、係留ワイヤー（Ｃ）（１３）、係留ワイヤー（Ｄ）（１４）、係留ワイヤー（Ｅ）（１５）、係留ワイヤー（Ｆ）（１６）を個々に巻取り・送出しするためのワイヤー巻取り・送出し機（６０）を建屋１階（３８）の内部の竪穴区画（３４）の側面近傍の円周上に均等に割り当て配置し、前記浮力体部（８）の側面に形成した係留ワイヤー用ガイド穴を経由させた係留ワイヤーの一端を、ワイヤー用滑車を介して前記タワー部（４）の建屋内に引き込み、個々の係留ワイヤーの長さを調節して浮力体部（８）を海面（７）に対して水平を保つように強制的に水没させることにより、浮体式洋上風力発電所（１）が海面（７）に対して縦揺れ、横揺れを小さく抑え水平状態を維持するように構成したことを特徴とする浮体式洋上風力発電所。 In a floating offshore wind power plant , which consists of a tower supporting a nacelle containing multiple blades, gearboxes, and generators,
The tower section (4) to be placed offshore is constructed of a roughly conical reinforced concrete structure, with the top section (33) formed as a circular plane, and steel pipes (23) for attaching the nacelle are attached to the top section (33), the upper diameter (A) of the tower section at the top section (33) is formed as a circle of 5m, the upper slab thickness (B) of the tower section at the top section (33) is formed as 500mm, the height (C) of the tower section (4) from the top section (33) to the tower base (39) is formed as 97m, the lower part of the tower section (4) is composed of a four-story building (5) with each floor having a height of 5m, the tower base slab thickness (D) of the bottom of the tower section (4) is formed as 1m, and the lower part of the tower section (4) has a base diameter (S) formed as a circle with a diameter of 25m.
The buoyancy body (8) placed in the water is generally cylindrical and constructed of reinforced concrete. To serve as a floating structure for the floating offshore wind power plant (1) on the ocean, its interior is hollow. The thickness of the outer skin of the reinforced concrete outer surface and upper and lower surfaces of the buoyancy body (8) is 200 mm for the upper, lower, and outer surfaces. Furthermore, the front and rear bottoms of the buoyancy body (8) are formed with a shape that slopes forward and backward. (N) is formed in a 100m cylindrical shape, and the height (J) of the buoyancy body (8), excluding the forward inclined section (31) and the rear inclined section (32), is formed at 10m, and the height (K) of the tip of the forward inclined section (31) and the height (R) of the rear inclined section (32) of the buoyancy body (8) are both formed at 3m, and the angle (M) of the forward inclined section (31) and the angle (P) of the rear inclined section (32) are both 1 with respect to the bottom surface. The buoyancy body (8) is formed at a 4-degree angle, with the maximum width (L) of the forward-sloping section (31) and the maximum width (Q) of the rear-sloping section (32) both being 12 m. Furthermore, the sides of the buoyancy body (8) are guided by a radius of 30 cm to hold six mooring wires (A) (11), mooring wires (B) (12), mooring wires (C) (13), mooring wires (D) (14), mooring wires (E) (15), and mooring wires (F) (16) in fixed positions on the sides of the buoyancy body (8). The buoyancy body (8) has six mooring wire guide holes (A) (25), mooring wire guide holes (B) (26), mooring wire guide holes (C) (27), mooring wire guide holes (D) (28), mooring wire guide holes (E) (29), and mooring wire guide holes (F) (30) formed in a roughly semi-cylindrical shape, which are formed vertically on the side of the buoyancy body (8) that radiate outwards at 60-degree intervals from the center when viewed on the horizontal plane of the upper surface of the buoyancy body (8),
To minimize resistance from ocean waves and suppress the swaying of the floating offshore wind power plant (1), the eight support columns (6) connecting the tower section (4) and the buoyancy section (8) are all made of cylindrical steel pipes with a diameter of 2 m, a wall thickness of 30 mm, and a length of 10 m. Eight support columns (A) (45), (B) (46), and (C) are positioned at 45-degree intervals from the center of the upper surface of the buoyancy section (8) on a circumference with a radius of 1050 cm when viewed in the horizontal plane. )(47), support columns (D)(48), support columns (E)(49), support columns (F)(50), support columns (G)(51), support columns (H)(52) are mounted vertically so as to be positioned at the center of the eight support columns (A)(45), support columns (B)(46), support columns (C)(47), support columns (D)(48), support columns (E)(49), support columns (F)(50), support columns (G)(51), support columns (H)(52) are attached to the lower surface of the tower base (39) with support column (6),
A vertical shaft compartment (34) is formed in the shape of a cylinder with a diameter of 4 m, extending from approximately the top (33) of the tower section (4) through the bottom (39) of the tower, and down to approximately the bottom of the central part of the buoyancy body section (8),
In order to moor the floating offshore wind power plant (1) to the seabed (9) in the TLP type, six mooring wires (A) (11), mooring wires (B) (12), mooring wires (C) (13), mooring wires (D) (14), mooring wires (E) (15), and mooring wires (F) (16) are attached to six seabed foundation piles (A) (17), seabed foundation piles (B) (18), seabed foundation piles (C) (19), seabed foundation piles (D) (20), seabed foundation piles (E) (21), and seabed foundation piles (F) (22) fixed to the seabed (9), and the six mooring wires (A) (11), mooring wires (B) (12), mooring wires (C) (13), and mooring wires (D) ( 14) A floating offshore wind power plant characterized in that a wire winding and releasing machine (60) for individually winding and releasing mooring wires (E) (15) and mooring wires (F) (16) is evenly distributed on the circumference near the side of the vertical shaft compartment (34) inside the first floor (38) of the building, one end of the mooring wires is pulled into the building of the tower section (4) via a wire pulley through guide holes for mooring wires formed on the side of the buoyancy body section (8), and the length of each mooring wire is adjusted to forcibly submerge the buoyancy body section (8) so as to maintain a horizontal position relative to the sea surface (7), thereby enabling the floating offshore wind power plant (1) to suppress vertical and horizontal swaying relative to the sea surface (7) and maintain a horizontal state .
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| JP2023077608A (en) | 2021-11-25 | 2023-06-06 | 鹿島建設株式会社 | Height adjustment method and height adjustment structure |
| JP2023124020A (en) | 2022-02-25 | 2023-09-06 | 三井海洋開発株式会社 | Tension mooring floating body, floating structure for mooring preparation, detachable column, offshore wind power generation equipment, and tension mooring method for tension mooring floating body |
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