A semi-submersible floating wind turbine platform suitable for high flow sea areas

Abstract

This invention relates to a semi-submersible floating wind power platform suitable for high-velocity sea areas, comprising several spaced-apart columns, with the bottoms of adjacent columns connected by float plate units. Each float plate unit consists of a first support plate and a second support plate arranged parallel to each other from top to bottom along the column height. The top and bottom faces of the first and second support plates are all provided with convex arc surfaces. The first and second support plates are connected by several support columns, which are arranged at an angle to form a V-shaped structure between adjacent support columns. A tower is fixed to the top of one column, and a wind turbine is fixed to the top of the tower. This design effectively reduces the drag coefficient while ensuring stability and seakeeping, thereby avoiding the generation of large eddies around the platform, reducing the current load, and improving resistance to high-velocity currents.

Description

Technical Field

[0001] This invention relates to the field of marine new energy technology, and in particular to a semi-submersible floating wind power platform suitable for high-velocity sea areas. Background Technology

[0002] To meet the country's huge energy demand, the exploration of offshore wind power equipment and related technologies is urgently needed.

[0003] As wind energy exploitation moves into deeper waters, wind power equipment faces numerous challenges, the most severe being how to withstand the complex environmental loads of deep-sea environments. Due to the need to operate in diverse and complex sea conditions, offshore floating wind turbine foundations are structurally more complex than onshore or offshore fixed wind turbine foundations. Different floating foundation platforms can be adapted to the environmental conditions of the operating sea area. The main types of floating wind turbine foundations include single-column, semi-submersible, tension leg, and barge types. Among these, semi-submersible floating wind turbine foundations are the most widely used worldwide due to their best water depth adaptability, structural stability, and low construction, transportation, and installation costs. However, for semi-submersible floating wind turbine platforms, the loads on the underwater portion of the platform are relatively complex.

[0004] The existing semi-submersible floating wind turbine platform structure includes a lower floating body and a wind turbine installed on top of the lower floating body. The traditional lower floating body has a large volume and a large surface area facing the current, so it is subjected to a large current load, which causes it to have a large horizontal movement in high-velocity sea areas, seriously affecting the working stability of the mooring system connected to the platform. Summary of the Invention

[0005] In response to the shortcomings of the existing production technologies, the applicant provides a structurally sound semi-submersible floating wind power platform suitable for high-velocity sea areas. This platform can effectively reduce its drag coefficient while ensuring its stability and wave resistance, thereby avoiding the generation of large eddies around it, reducing the current load it receives, and improving its ability to resist large ocean currents.

[0006] The technical solution adopted in this invention is as follows:

[0007] A semi-submersible floating wind power platform suitable for high-velocity sea areas includes several spaced columns, with the bottoms of adjacent columns connected by a floating plate unit.

[0008] The structure of a single floating plate unit is as follows: it includes a first support plate and a second support plate arranged in parallel from top to bottom along the height direction of the column. The top end face of the first support plate, the bottom end face of the first support plate, and the top end face of the second support plate are all provided with outwardly convex arc surfaces. The first support plate and the second support plate are connected by several support columns. The support columns are arranged at an incline, so that a V-shaped structure is formed between two adjacent support columns.

[0009] A tower is fixed to the top of a column, and a wind turbine is fixed to the top of the tower.

[0010] As a further improvement to the above technical solution:

[0011] The structure of a single first support plate is as follows: it includes a first arc-shaped plate and a second arc-shaped plate arranged symmetrically, with the flat end of the first arc-shaped plate and the flat end of the second arc-shaped plate tightly attached to each other.

[0012] The bottom end face of a single column is fixed with concentrically arranged sway plates.

[0013] Each heave plate is disc-shaped.

[0014] The diameter of the sway plate is larger than the diameter of the corresponding column.

[0015] The tops of two adjacent columns are connected by struts.

[0016] The columns are arranged in a triangular pattern.

[0017] The columns are arranged in a cylindrical shape.

[0018] The beneficial effects of this invention are as follows:

[0019] The present invention has a compact and reasonable structure and is easy to operate. By setting a first support plate and a second support plate, which are flat in shape and streamlined at the end face, it can effectively avoid the generation of large eddies behind the floating body unit when the ocean current flows through the floating body unit, thus avoiding the increase in flow resistance caused by pressure imbalance.

[0020] In this invention, by setting up support columns with adjacent support columns forming a V-shape, the support strength of the support columns can be improved, meeting the overall strength requirements of the semi-submersible floating wind power platform, and reducing interference with the flow field, thus ensuring the stability of the flow field.

[0021] By incorporating a heave plate, the added mass, radiation damping, and viscous damping of the semi-submersible floating wind turbine platform can be increased, thereby improving its wave resistance and reducing its motion response. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention.

[0023] Figure 2 for Figure 1 The main view.

[0024] Figure 3 for Figure 1 Side view.

[0025] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0026] Figure 5 This is a side sectional view of the floating plate unit in this invention.

[0027] Figure 6 A schematic diagram of the flow direction of the ocean current as it flows through the floating plate unit in this invention.

[0028] The components include: 1. Column; 2. Heave plate; 3. Support column; 4. Wind turbine; 5. First support plate; 6. Second support plate; 7. Support rod; 8. Tower.

[0029] 501, First curved plate; 502, Second curved plate. Detailed Implementation

[0030] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0031] The structure and function of this invention are as follows:

[0032] like Figures 1-6 As shown, a semi-submersible floating wind power platform suitable for high-velocity sea areas includes several spaced-apart columns 1, with the bottoms of adjacent columns 1 connected by float plate units. The structure of a single float plate unit includes a first support plate 5 and a second support plate 6 arranged parallel to each other from top to bottom along the height direction of the column 1. The top and bottom ends of the first support plate 5 and the top end of the second support plate 6 are all provided with convex arc surfaces. The first support plate 5 and the second support plate 6 are connected by several support columns 3, which are arranged at an angle to form a V-shaped structure between adjacent support columns 3. A tower 8 is fixed to the top of one column 1, and a wind turbine 4 is fixed to the top of the tower 8. The semi-submersible floating wind power platform of this invention includes several columns 1, wind turbine 4, tower 8, and float plate units; wherein...

[0033] like Figures 2-6 As shown, the floating plate unit includes a first support plate 5, a second support plate 6, and a support column 3. The structure of a single first support plate 5 is as follows: it includes a first arc-shaped plate 501 and a second arc-shaped plate 502 arranged symmetrically, with the flat end of the first arc-shaped plate 501 and the flat end of the second arc-shaped plate 502 tightly attached to each other.

[0034] In this invention, the top and bottom surfaces of the first support plate 5 are arc-shaped, which can minimize flow resistance and prevent the generation of large eddies.

[0035] The top end face of the second support plate 6 is arc-shaped, which can reduce flow resistance, and its bottom end face is flat, which facilitates the stability of the overall structure during the manufacturing process of the semi-submersible floating wind power platform, improves manufacturing convenience, reduces manufacturing costs, and reduces manufacturing difficulty.

[0036] By setting a first support plate 5 and a second support plate 6 with relatively flat shapes and streamlined end faces, such as Figure 6 As shown, when the ocean current flows through the floating body unit, it can effectively prevent the generation of large eddies behind the floating body unit, which would cause pressure imbalance and increase the flow resistance.

[0037] In addition, the flow load on the floating body element can be referenced using the Morrison formula:

[0038] F=ρC d AV 2 / 2

[0039] In the above formula, F represents the fluid force acting on the floating body unit;

[0040] ρ represents the density of seawater;

[0041] C d Indicates the flow resistance coefficient;

[0042] A represents the frontal area;

[0043] V represents the incoming flow velocity;

[0044] When the ocean current flows through the float unit of the present invention, while ensuring that the total flow-facing area of ​​the float unit of the present invention remains unchanged compared with that of the conventional float unit, the first support plate 5 and the second support plate 6 in the float unit of the present invention are flatter and have a streamlined design, thereby reducing the drag coefficient of the float unit of the present invention. As can be seen from the above formula, the float unit of the present invention is subjected to a smaller flow load. At the same time, the arc surfaces on the first support plate 5 and the second support plate 6 can prevent the generation of large eddies behind the float unit under high-speed currents, thereby effectively avoiding the problem of increased drag caused by pressure imbalance due to large eddies.

[0045] like Figures 2-3 As shown, the support column 3 in this invention is long and narrow, and multiple support columns 3 are arranged at an angle with their ends connected, so that two adjacent support columns 3 form a V-shape, thereby improving the support strength of the support column 3, meeting the overall strength requirements of the semi-submersible floating wind power platform, and reducing interference with the flow field to ensure the stability of the flow field.

[0046] In this invention, the connection between the column 1 and the tower 8, the connection between the column 1 and the first support plate 5, the connection between the column 1 and the second support plate 6, the connection between the first support plate 5 and the support column 3, and the connection between the second support plate 6 and the support column 3 are all rigidly fixed.

[0047] Furthermore, the tops of two adjacent columns 1 are connected by a strut 7. The strut 7 is long and has a square or round cross-section, which can provide support and improve the structural stability and overall strength of the semi-submersible floating wind power platform. The columns 1 and the strut 7 are also rigidly fixed.

[0048] The present invention can have three columns 1 arranged in a triangular layout, or more than three columns 1 arranged in a cylindrical layout. The cylindrical layout can reduce the flow resistance coefficient while ensuring the waterline area of ​​the semi-submersible floating wind power platform. For a single column 1, a heave plate 2 is fixed at its bottom. The heave plate 2 and the column 1 can be integrally formed or rigidly connected by welding or other methods. The heave plate 2 is arranged concentrically with the corresponding column 1. Each heave plate 2 is disc-shaped and its diameter is larger than that of the corresponding column 1.

[0049] In addition, when the bottom of the column 1 is fixed with the sway plate 2, the thickness of the sway plate 2 is the same as the maximum thickness of the second support plate 6. At this time, the second support plate 6 is rigidly connected to the sway plate 2 so that the length of the first support plate 5 is greater than the length of the second support plate 5.

[0050] The heave plate 2 can increase the added mass, radiation damping and viscous damping of the semi-submersible floating wind turbine platform, improve the wave resistance of the semi-submersible floating wind turbine platform, and thus reduce the motion response of the semi-submersible floating wind turbine platform.

[0051] The working process of this invention is as follows:

[0052] The semi-submersible floating wind power platform of the present invention floats on the sea surface, and the wind turbine 4 captures strong winds on the sea surface to generate electricity;

[0053] During the floating process of a semi-submersible floating wind turbine platform, ocean currents flow through the floating plate units, such as... Figure 6 As shown, the ocean current in the middle section flows through the streamlined gap between the first support plate 5 and the second support plate 6, while the ocean current above flows through the arc-shaped end face of the first arc-shaped plate 501. This can prevent the generation of large eddies behind the float plate unit, greatly reduce the horizontal flow resistance coefficient of the float plate unit, and reduce the flow load on the float plate unit.

[0054] The above description is an explanation of the present invention and not a limitation thereof. The scope of the present invention is defined by the claims. Within the scope of protection of the present invention, any form of modification may be made.

Claims

1. A semi-submersible floating wind turbine platform suitable for high flow sea areas, characterized in that: It includes several spaced columns (1), with the bottoms of two adjacent columns (1) connected by floating plate units; The structure of a single floating plate unit is as follows: it includes a first support plate (5) and a second support plate (6) arranged in parallel from top to bottom along the height direction of the column (1). The top end face of the first support plate (5), the bottom end face of the first support plate (5), and the top end face of the second support plate (6) are all provided with outwardly convex arc surfaces. The first support plate (5) and the second support plate (6) are connected by several support columns (3). The support columns (3) are arranged in an inclined connection, so that a V-shaped structure is formed between two adjacent support columns (3). A tower (8) is fixed to the top of a column (1), and a wind turbine (4) is fixed to the top of the tower (8).

2. A semi-submersible floating wind turbine platform suitable for high flow sea areas as claimed in claim 1, characterized in that: The structure of a single first support plate (5) is as follows: it includes a first arc plate (501) and a second arc plate (502) arranged symmetrically, with the flat end of the first arc plate (501) and the flat end of the second arc plate (502) tightly attached to each other.

3. A semi-submersible floating wind turbine platform suitable for high flow sea areas as claimed in claim 1, characterized in that: A single column (1) has concentrically arranged sway plates (2) fixed to its bottom end face.

4. A semi-submersible floating wind power platform suitable for high-velocity sea areas as described in claim 3, characterized in that: The single heave plate (2) is disc-shaped.

5. A semi-submersible floating wind power platform suitable for high-velocity sea areas as described in claim 3, characterized in that: The diameter of the sway plate (2) is larger than the diameter of the corresponding column (1).

6. A semi-submersible floating wind power platform suitable for high-velocity sea areas as described in claim 1, characterized in that: The tops of two adjacent columns (1) are connected by a strut (7).

7. A semi-submersible floating wind power platform suitable for high-velocity sea areas as described in claim 1, characterized in that: The columns (1) are arranged in a triangular pattern.

8. A semi-submersible floating wind power platform suitable for high-velocity sea areas as described in claim 1, characterized in that: The columns (1) are arranged in a cylindrical shape.

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