A truss-type offshore floating wind power platform

Abstract

The present invention relates to a truss-type offshore floating wind power platform, which includes a tower, a wind turbine generator set, a floating body, a wind deflector and an anchoring system. The tower is of a truss structure and includes a column and a base. The column is perpendicular to the base, and the size of the tower decreases from the base to the top. The wind turbine generator set is arranged at the top of the column, the wind deflector is arranged on the tower, the floating body is arranged on the base, and the anchoring system is connected to the floating body. The floating body includes a main floating body, and the main floating body is arranged below the column. By adopting the wind deflector, the truss-type offshore floating wind power platform of the present invention can achieve passive yaw, so that the nacelle and the wind turbine generator set do not need to rotate 360° around the tower, enabling the application of a truss structure with a long lever arm, strong rigidity and light weight. Moreover, the floating body can be directly installed on the truss structure, and the force-bearing of the entire wind power platform structure is more reasonable than that of the prior art; it is light in weight, shallow in draft, easy to manufacture, install and maintain, uses less materials, and has better economy.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power, and particularly relates to a truss-type offshore floating wind power platform. Background Art

[0002] An offshore floating wind power platform is a platform for generating electricity relying on wind power. Existing floating wind power platforms usually adopt onshore or offshore fixed wind power structures, and an active yaw system is used to align the wind turbine with the wind direction. However, due to the existence of the active yaw system, the nacelle and the wind turbine need to rotate 360° around the tower barrel, so a cylindrical or conical tower barrel structure with a small volume and poor rigidity is adopted. Due to the adoption of the above structure, in order to meet the rigidity requirements of the wind power platform, it is necessary to increase the diameter of the tower barrel and thicken the wall thickness of the tower barrel, resulting in a large weight of the tower barrel, increased difficulty in manufacturing, transportation and installation, increased cost and poor economy. The blade diameter of existing 2 MW wind turbines can reach 80 m, and the corresponding base weight can reach 1200 tons, which greatly increases the construction cost and reduces the input-output ratio of the floating wind power station. In addition, in order to resist the load brought by wind and waves and meet the requirements of the wind power mechanism for the stability of the tower barrel, the wind power platform needs to increase the weight, increase the buoyancy, strengthen the anchor force of the mooring system, etc., resulting in an increase in costs such as manufacturing, installation and transportation. Summary of the Invention

[0003] In order to solve the problems of the prior art, the present invention provides a truss-type offshore floating wind power platform with passive yaw, strong rigidity, long lever arm, light weight and good stability.

[0004] The specific technical solution is as follows: A truss-type offshore floating wind power platform includes a tower, a wind turbine, a floating body, a wind deflector and a mooring system. The tower is of a truss structure and includes a column and a base. The column is perpendicular to the base, and the size of the tower decreases from the base to the top. The wind turbine is arranged at the top of the column, the wind deflector is arranged on the tower, the plane of the wind deflector is parallel to the fan shaft of the wind turbine, and there is at least one wind deflector. The floating body is arranged on the base, and the mooring system is connected to the floating body. The floating body includes a main floating body, and the main floating body is arranged below the column.

[0005] The following are the subsidiary technical solutions of the present invention.

[0006] As a preferred solution, the tower includes a first support rod and a second support rod. The two ends of the first support rod are respectively connected to the column and the base, and the two ends of the second support rod are respectively connected to the column and the base. The first support rod and the second support rod are symmetrically arranged.

[0007] As a preferred solution, the tower includes a cross bar and a connecting rod. The cross bar is arranged between the column and the first support rod, the cross bar is arranged between the column and the second support rod, the cross bar is arranged between the first support rod and the second support rod, and the connecting rod is arranged between the cross bars.

[0008] Preferably, the tower is triangular pyramid-shaped.

[0009] Preferably, the back surface of the tower is an arc surface.

[0010] Preferably, the floating body includes a secondary floating body. The base is triangular, the column is arranged at one end corner of the triangular base, and the secondary floating body is arranged at the other two end corners of the triangular base.

[0011] Preferably, ballast water is provided in the floating body.

[0012] Preferably, the truss-type offshore floating wind power platform includes anti-heave plates. The anti-heave plates are arranged below the floating body and are horizontally arranged.

[0013] Preferably, the mooring system includes an anchor body and a connection component. The floating body is connected to the anchor body through the connection component.

[0014] Preferably, the connection component includes a cable, and the cable is connected to the floating body.

[0015] Technical effects of the present invention: By adopting a wind deflector, the truss-type offshore floating wind power platform of the present invention can achieve passive yaw, so that the nacelle and the wind turbine do not need to rotate 360° around the tower, enabling the application of a truss structure with a long lever arm, strong rigidity, and light weight, and the floating body can be directly installed on the truss structure. The force-bearing of the entire wind power platform structure is more reasonable than that of the prior art; it is light in weight, shallow in draft, easy to manufacture, install, and maintain, uses less materials, and has good economy. Description of the Drawings

[0016] Figure 1 is a schematic diagram of a truss-type offshore floating wind power platform according to an embodiment of the present invention.

[0017] Figure 2 is a top view of a truss-type offshore floating wind power platform according to an embodiment of the present invention.

[0018] Figure 3 is a three-dimensional view of a truss-type offshore floating wind power platform according to an embodiment of the present invention.

[0019] Figure 4 is a schematic diagram of a first implementation manner of the mooring system according to an embodiment of the present invention.

[0020] Figure 5 is a schematic diagram of a second implementation manner of the mooring system according to an embodiment of the present invention.

[0021] Figure 6 is a schematic diagram of a third implementation manner of the mooring system according to an embodiment of the present invention.

[0022] Figure 7 It is a schematic diagram of the fourth implementation manner of the mooring system according to an embodiment of the present invention.

[0023] Figure 8 It is a schematic diagram of the fifth implementation manner of the mooring system according to an embodiment of the present invention. Specific implementation manner

[0024] Next, the substantial features and advantages of the present invention will be further described in conjunction with examples, but the present invention is not limited to the listed embodiments.

[0025] As Figures 1 to 8 shown, a truss-type offshore floating wind power platform in this embodiment includes a tower 1, a wind turbine 2, a floating body 3, a wind deflector 4, and a mooring system 5. The tower 1 is a truss structure, which includes columns 11 and a base 12. The columns 11 are perpendicular to the base 12, and the size of the tower 1 decreases from the base to the top. The wind turbine 2 is arranged at the top of the column 11, the wind deflector 4 is arranged on the tower 1, the plane of the wind deflector is parallel to the fan axis of the wind turbine, there is at least one wind deflector, the floating body 3 is arranged on the base, and the mooring system 5 is connected to the floating body. The floating body 3 includes a main floating body 31, and the main floating body 31 is arranged below the column 11.

[0026] In the above technical solution, the tower adopts a truss structure, which has high stiffness, good economy, light self-weight, large base span, good bending resistance, convenient transportation and hoisting, simple manufacturing, long anti-overturning lever arm, and large moment; the tower and the base are integrated, with light weight, material and labor saving, and good balance performance.

[0027] By using the deflection moment generated by the tail-wing type wind deflector, the entire platform is driven to rotate, so that the wind turbine is aligned with the incoming wind direction. By changing the active yaw system into a passive yaw system, the fan nacelle and the wind turbine do not need to rotate 360° around the tower. Through the guidance of the wind deflector, the yaw structure is simplified, the use reliability is increased, and the operation and maintenance cost is reduced; the weight of the fan nacelle can be reduced, the center of gravity is lowered, the stability of the nacelle structure is high, and the manufacturing cost is reduced. In this embodiment, the tower can adopt a cable truss structure. When there are multiple wind deflectors, the wind deflectors are parallel to each other.

[0028] In this embodiment, the tower 1 includes a first support rod 13 and a second support rod 14, the two ends of the first support rod 13 are respectively connected to the column 11 and the base 12, the two ends of the second support rod 13 are respectively connected to the column 11 and the base 12, and the first support rod and the second support rod are symmetrically arranged. The tower 1 includes a cross bar 15 and a connecting rod 16, the cross bar 15 is arranged between the column 11 and the first support rod 13, the cross bar 15 is arranged between the column 11 and the second support rod 14, the cross bar is arranged between the first support rod and the second support rod, and the connecting rod 16 is arranged between the cross bars. Through the above technical solution, the rigidity of the tower can be enhanced, the structural stability can be improved, and the weight can be reduced. In this embodiment, the connecting rods 16 are staggered.

[0029] In this embodiment, the tower 1 is in the shape of a triangular pyramid, the inclined surfaces on both sides of the column 11 are right triangles, and the back of the tower is a triangle, so that the tower can be more stable and more resistant to bending.

[0030] As an implementation mode, the back side of the tower 1 can be set to be a curved surface, so as to further reduce the material and weight of the tower while ensuring the rigidity of the tower, thereby reducing the manufacturing cost.

[0031] In this embodiment, the floating body 3 includes an auxiliary floating body 32, the base 12 is triangular, the column 11 is arranged at one end corner 121 of the triangular base, and the auxiliary floating body is arranged at the other two end corners 122 of the triangular base. Through the above technical solution, the main floating body and the auxiliary floating body can stably support the tower.

[0032] In this embodiment, ballast water is provided in the floating body 3. By adopting a semi-submersible floating body, the floating body has large inertia, good initial stability, small waterline area and good hydrodynamic performance.

[0033] In this embodiment, the truss-type offshore floating wind power platform includes an anti-heave plate 6, which is arranged below the floating body and arranged horizontally. The anti-heave plate can reduce the up and down shaking of the floating body on the sea surface, thereby improving the stability of the platform.

[0034] In this embodiment, the mooring system 5 includes an anchor body 51 and a connecting assembly 52. ​​The floating body 3 is connected to the anchor body 51 through the connecting assembly 52. ​​The anchor body is fixed to the seabed, so that the tower will not float away through the connecting assembly.

[0035] In this embodiment, the connection assembly 52 includes a cable 521, which is connected to the floating body 3, and the tower can be rotated around the anchor body through the cable.

[0036] As an implementation method, Figure 4 As shown, the mooring system can adopt an inner rotating tower single-point mooring, and the cable can be a suspension chain, which directly connects the main buoy and the anchor body through the suspension chain, so that the tower can be rotated to change the direction of the wind turbine.

[0037] As an implementation manner, as Figure 5 shown, the mooring system can adopt an external turret single-point mooring. The connecting component 52 includes a mooring floating body 522. The mooring floating body 522 is connected to the tower 1, and a catenary connects the mooring floating body and the anchor body, and the rotation of the tower can also be realized.

[0038] As an implementation manner, as Figure 6 shown, the mooring system can adopt a single-leg single-point mooring. The connecting component 52 includes a mooring floating body 522. The mooring floating body 522 is provided with a fixed pulley 523. One end of a cable is fixed on the anchor body, and the other end is connected to the main floating body through the fixed pulley, so as to realize the mooring of the tower.

[0039] As an implementation manner, as Figure 7 shown, the mooring system can adopt a buffer tensioning type mooring. The connecting component 52 includes a mooring floating body 522. Multiple cables connect the mooring floating body, the main floating body and the anchor body, so that the cable is tensioned, and thus the mooring system has a buffering capacity.

[0040] As an implementation manner, as Figure 8 shown, the mooring system can adopt a direct tensioning type mooring. The cable 521 is tensioned and connected to the anchor body 51 and the main floating body 3.

[0041] The truss-type offshore floating wind power platform of this embodiment includes a power slip ring. The function of the power slip ring is power relay and preventing the cable from being kinked due to the rotation of the platform. In the prior art, the power slip ring is arranged in the fan nacelle. In this embodiment, the power slip ring is arranged in the mooring system. The cable 7 is connected to the conducting wire 8 through the power slip ring. As Figure 7 shown, in this embodiment, the mooring system includes a relay floating body 9. The power slip ring is arranged on the relay floating body, so that the cable and the conducting wire are connected through the power slip ring. The conducting wire leads to the onshore power grid. The power slip ring is a commonly used component in the existing power generation field and will not be elaborated here.

[0042] The truss-type offshore floating wind power platform of this embodiment adopts a wind deflector, so that the fan nacelle and the wind turbine do not need to rotate 360° around the tower, enabling the application of a truss structure with a long lever arm, strong rigidity and light weight, and being able to directly install a floating body on the truss structure. The force on the entire wind power platform structure is more reasonable than that in the prior art; it is light in weight, shallow in draft, easy to manufacture, install, maintain, uses less materials, and has better economy.

[0043] It should be noted that the above-mentioned preferred embodiments are only used to illustrate the technical concept and features of the present invention, and their purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A truss-type offshore floating wind power platform, characterized in that, It includes a tower, a wind turbine, a floating body, a wind deflector and an anchoring system. The tower is of a truss structure and includes columns and a base. The columns are perpendicular to the base, and the size of the tower decreases from the base to the top. The wind turbine is arranged at the top of the columns, the wind deflector is arranged on the tower, and the plane of the wind deflector is parallel to the axis of the fan of the wind turbine. There is at least one wind deflector. The floating body is arranged on the base, and the anchoring system is connected to the floating body. The floating body includes a main floating body, and the main floating body is arranged below the columns. The tower includes a first support rod and a second support rod. The two ends of the first support rod are respectively connected to the column and the base, and the two ends of the second support rod are respectively connected to the column and the base. The first support rod and the second support rod are symmetrically arranged. The tower is of a triangular pyramid shape.

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