Twin-impeller single point mooring power generation system

Abstract

This utility model provides a dual-rotor single-point moored power generation system, relating to the field of deep-sea wind power generation. The dual-rotor single-point moored power generation system includes a floating foundation and a wind turbine generator. The floating foundation includes two interconnected inclined support towers, floating piles, and connecting components. The two inclined support towers are V-shaped, each having a first end. The inclined support towers are fixedly connected to the floating piles and to each other via the connecting components. The wind turbine generator includes a first wind turbine generator and a second wind turbine generator, which are respectively installed at the first ends of the two inclined support towers. A horizontal stay cable is provided between the two inclined support towers, with both ends of the stay cable fixedly connected to the two inclined support towers. The additional horizontal stay cable between the V-shaped inclined support towers, with both ends fixedly connected to the two inclined support towers, significantly enhances the overall structural stability and resistance to bending and torsion.

Description

Technical Field

[0001] This utility model relates to the field of deep-sea wind power generation, specifically to a dual-impeller single-point mooring power generation system. Background Technology

[0002] With the continuous growth of global demand for renewable energy, offshore wind power, as an important component of clean energy, has developed rapidly. In recent years, the development areas for wind power have gradually expanded from nearshore to deep-sea areas, while the single-unit capacity of wind turbines has also shown a trend towards larger sizes.

[0003] Researchers have discovered that the inherent flexibility of large structural components leads to significant elastic deformation of the generating unit during operation. This deformation not only affects the unit's power generation efficiency but may also pose a threat to structural safety. Especially under extreme weather conditions such as typhoons, excessive structural deformation could lead to serious consequences such as blades colliding with the tower. Utility Model Content

[0004] This utility model discloses a dual-impeller single-point moored power generation system. By setting a horizontal cable between the two inclined support towers, the included angle of the V-shaped inclined support towers can be effectively increased, thereby adapting to larger-sized generator sets and improving the system power capacity. At the same time, this structure significantly enhances the structural rigidity and stability of the entire power generation system, and is especially suitable for floating wind power devices in complex marine environments.

[0005] The embodiments of this utility model can be implemented as follows: A dual-rotor single-point moored power generation system includes a floating foundation and a wind turbine generator set. The floating foundation includes two interconnected inclined support towers, floating piles, and connecting components. The two inclined support towers are V-shaped and each has a first end. The inclined support towers are fixedly connected to the floating piles and to each other via the connecting components. The wind turbine generator set includes a first wind turbine generator set and a second wind turbine generator set, which are respectively installed at the first ends of the two inclined support towers. A horizontal stay cable is provided between the two inclined support towers, and the two ends of the horizontal stay cable are fixedly connected to the two inclined support towers respectively.

[0006] Optionally, the connecting assembly includes a central crossbeam, the two ends of which are fixedly connected to the two inclined support towers, and the central crossbeam is arranged parallel to the horizontal stay cable.

[0007] Optionally, the connecting assembly further includes a first inclined beam and a second inclined beam, and the two inclined support towers are respectively the first inclined support tower and the second inclined support tower. One end of the first inclined beam is fixedly connected to the first inclined support tower and the other end is fixedly connected to the floating pile; one end of the second inclined beam is fixedly connected to the second inclined support tower and the other end is fixedly connected to the floating pile.

[0008] Optionally, the floating foundation further includes a lower buoy box connected to one end of the buoy pile away from the first inclined beam.

[0009] Optionally, the connecting assembly includes a central crossbeam, the two ends of which are fixedly connected to the two inclined support towers, and the central crossbeam is arranged parallel to the stay cables, wherein: There is a height difference between the projection of the lower floating box and the projection of the intermediate crossbeam in the first plane, and the projection of the lower floating box is located on the side closer to the wind turbine compared to the projection of the intermediate crossbeam.

[0010] Optionally, the dual-impeller single-point mooring power generation system is symmetrically distributed with the plane formed by the plane containing the diameter of the floating pile and the line connecting the midpoint of the intermediate crossbeam as the plane of symmetry.

[0011] Optionally, both the first wind turbine and the second wind turbine include an impeller and a nacelle assembly connected to each other. The nacelle assembly is fixedly connected to the first end, and the impeller is rotatably connected to the nacelle assembly.

[0012] Optionally, the angle α between the mounting plane of the impeller and the first direction is 5° to 15°.

[0013] Optionally, the angle β between the inclined support tower and the first direction is 60° to 64°.

[0014] Optionally, the angle γ between the inclined support tower and the third direction is 6° to 12°.

[0015] The beneficial effects of the dual-impeller single-point moored power generation system of this utility model embodiment include: The two V-shaped inclined support towers are not only rigidly fixed together by connecting components, but also additionally equipped with horizontal stay cables, each fixedly connected at both ends to the two inclined support towers, thus significantly enhancing the overall structural stability and resistance to bending and torsion. This structure effectively improves the structural stiffness and load-bearing capacity of the floating foundation, allowing the first and second wind turbine units to be fitted with larger rotors, thereby increasing the total power capacity of the system and making it suitable for upwind conditions. Simultaneously, in complex sea conditions, especially extreme weather conditions, this structure helps reduce the vibration and deformation of the inclined support towers, significantly reducing the risk of rotor-tower sweep and improving the safety and reliability of the power generation system. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the dual-impeller single-point moored power generation system provided in this embodiment from a first-view perspective. Figure 2 This is a top view of the dual-impeller single-point moored power generation system provided in this embodiment; Figure 3 This is a front view of the dual-impeller single-point moored power generation system provided in this embodiment; Figure 4 This is a left view of the dual-impeller single-point moored power generation system provided in this embodiment.

[0018] Icons: 1-Dual-rotor single-point moored power generation system; 10-Floating foundation; 11-Inclined support tower; 111-First inclined support tower; 112-Second inclined support tower; 113-First end; 12-Floating pile; 13-Connecting assembly; 131-Intermediate crossbeam; 133-First inclined beam; 134-Second inclined beam; 20-Wind turbine; 201-First wind turbine; 202-Second wind turbine; 21-Impeller; 22-Nacelle assembly; 30-Tie cable; 40-Lower floating box. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Also, in the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0024] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or connections that allow for communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] It should also be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0026] As described in the background section, large-scale wind power generation systems are prone to significant deformation during operation due to their inherent characteristics, which can pose safety hazards.

[0027] Please refer to Figures 1 to 4 This application provides a dual-impeller single-point moored power generation system 1, which can solve the above-mentioned technical problems.

[0028] The dual-rotor single-point moored power generation system 1 includes a floating foundation 10 and a wind turbine 20. The floating foundation 10 includes two interconnected inclined support towers 11, floating piles 12, and connecting components 13. The two inclined support towers 11 are V-shaped and have a first end 113. The inclined support towers 11 and the floating piles 12, as well as the two inclined support towers 11, are fixedly connected by the connecting components 13. The wind turbine 20 includes a first wind turbine 201 and a second wind turbine 202, which are respectively installed at the first end 113 of the two inclined support towers 11. A horizontal cable 30 is provided between the two inclined support towers 11, and the two ends of the horizontal cable 30 are fixedly connected to the two inclined support towers 11.

[0029] Please refer to Figure 1 The two V-shaped inclined support towers 11 are not only rigidly fixed together by connecting components 13, but also additionally equipped with horizontal stay cables 30, whose two ends are fixedly connected to the two inclined support towers 11 respectively, thereby significantly enhancing the overall structural stability and resistance to bending and torsion. This structure effectively improves the structural stiffness and load-bearing capacity of the floating foundation 10, allowing the first wind turbine 201 and the second wind turbine 202 to be fitted with larger rotors 21, thereby increasing the total power capacity of the system and making it suitable for upwind conditions. At the same time, in complex sea conditions, especially extreme weather conditions, this structure helps to reduce the vibration and deformation of the inclined support towers 11, significantly reducing the risk of rotor 21 sweeping the tower, and improving the safety and reliability of the power generation system operation.

[0030] The first wind turbine 201 and the second wind turbine 202 both include an impeller 21 and a nacelle assembly 22 that are connected to each other. The nacelle assembly 22 is fixedly connected to the first end 113, and the impeller 21 is rotatably connected to the nacelle assembly 22.

[0031] During operation, natural wind acts on the impeller 21, generating lift due to the airfoil pressure difference, which in turn drives the impeller 21 to rotate. The rotational mechanical energy is then transmitted to the nacelle via the main shaft. Next, the nacelle, with the stable support provided by the floating foundation 10, counteracts the reaction force generated by the impeller 21's rotation. Its internal gearbox (not present in direct-drive units) converts the low-speed mechanical energy of the impeller 21 into high-speed mechanical energy suitable for the generator through "reduction and torque amplification," transmitting it to the generator rotor. Subsequently, the generator rotor rotates under the drive of mechanical energy, and the magnetic field generated by its excitation winding cuts and fixes the stator winding in the nacelle. The stator winding generates primary alternating current due to electromagnetic induction. Finally, the converter in the nacelle converts the primary electrical energy into constant frequency or voltage alternating current conforming to grid standards, which is then transmitted via cable to the substation and ultimately connected to the public power grid.

[0032] Furthermore, the connecting assembly 13 includes a central crossbeam 131, with both ends of the central crossbeam 131 fixedly connected to two inclined support towers 11, and the central crossbeam 131 is arranged parallel to the stay cables 30. The combined use of the central crossbeam 131 and the stay cables 30 can more evenly distribute the forces exerted by wind and waves on the inclined support towers 11, thereby reducing stress concentration in individual components. This optimized load distribution helps extend the service life of the overall structure of the dual-rotor single-point moored power generation system 1 and reduces maintenance costs.

[0033] Furthermore, the connecting assembly 13 also includes a first inclined beam 133 and a second inclined beam 134. The two inclined support towers 11 are respectively the first inclined support tower 111 and the second inclined support tower 112. One end of the first inclined beam 133 is fixedly connected to the first inclined support tower 111, and the other end is fixedly connected to the floating pile 12. One end of the second inclined beam 134 is fixedly connected to the second inclined support tower 112, and the other end is fixedly connected to the floating pile 12. The first inclined beam 133 and the second inclined beam 134 enable the power generation system to have better resistance to strong winds and high waves, effectively transmit and disperse horizontal forces, reduce the lateral sway of the floating foundation 10, and thus improve the system's wind and wave resistance performance.

[0034] Furthermore, to increase the buoyancy and anti-overturning capacity of the overall power generation system structure, the floating foundation 10 also includes a lower pontoon 40, which is connected to the end of the pontoon pile 12 opposite to the first inclined beam 133. The lower pontoon 40 increases the overall volume and center of gravity of the system, thereby improving the system's anti-overturning capacity. Under strong wind or high wave conditions, the lower pontoon 40 can effectively resist lateral forces, reduce the lateral tilt of the system, and ensure the safe operation of the power generation system.

[0035] To further optimize the center of gravity distribution and improve the dynamic response of the system, the connecting component 13 includes a middle crossbeam 131. The two ends of the middle crossbeam 131 are fixedly connected to the two inclined support towers 11, and the middle crossbeam 131 is arranged parallel to the horizontal cable 30. There is a height difference between the projection of the lower floating box 40 and the projection of the middle crossbeam 131 in the first plane, and the projection of the lower floating box 40 is located on the side closer to the wind turbine 20 compared to the projection of the middle crossbeam 131.

[0036] There is a height difference between the projections of the lower pontoon 40 and the intermediate crossbeam 131 in the first plane, and the projection of the lower pontoon 40 is located closer to the wind turbine 20 compared to the projection of the intermediate crossbeam 131. Because the lower pontoon 40 is positioned closer to the wind turbine 20, it can better absorb and disperse the dynamic responses caused by waves and wind. This reduces the vibration and swaying of the power generation system and improves the overall dynamic stability of the power generation system.

[0037] It should be noted that the first direction, second direction, and third direction defined in this embodiment are perpendicular to each other. The first plane is formed by the first direction and the third direction, and the first direction is consistent with the extension direction of the intermediate crossbeam 131, while the third direction is consistent with the extension direction of the floating pile 12.

[0038] Furthermore, the dual-impeller single-point mooring power generation system 1 is symmetrically distributed with the plane formed by the plane containing the diameter of the floating pile 12 and the line connecting the midpoint of the intermediate crossbeam 131 as the plane of symmetry.

[0039] It's easy to understand that, on the one hand, the symmetrical structure simplifies the system's structural design and manufacturing process: identical components can be mass-produced, reducing manufacturing costs and facilitating installation and maintenance. The symmetrical design also makes the system easier to assemble and debug. On the other hand, due to the symmetrical structure, the motion response of each part of the power generation system is more consistent when subjected to waves and wind, reducing system vibration and swaying, improving the overall dynamic stability of the system, and thus improving the power generation efficiency and reliability of the wind turbine 20.

[0040] Furthermore, to improve the system's efficiency in capturing wind energy, the angle α between the mounting plane of the impeller 21 and the first direction is 5° to 15°. This tilt angle allows the impeller 21 to better meet the wind under different wind speeds and directions, thereby improving the wind energy conversion efficiency.

[0041] Furthermore, in order to effectively transfer the weight and wind load of the wind turbine 20 to the foundation structure and reduce the bending stress of the tower, the angle β between the inclined support tower 11 and the first direction is 60° to 64°.

[0042] Furthermore, the angle γ between the inclined support tower 11 and the third direction is 6° to 12°. At this angle, the inclined support tower 11 can more effectively transfer wind power to the rotor 21, especially under low wind speed conditions. This design increases the effective windward area of ​​the rotor 21, improves wind energy capture efficiency, and thus increases power generation.

[0043] In summary, this utility model embodiment provides a dual-impeller single-point moored power generation system 1. In this system, the two V-shaped inclined support towers 11 are not only rigidly fixed together by connecting components 13, but also additionally equipped with horizontal stay cables 30, whose two ends are fixedly connected to the two inclined support towers 11 respectively, thereby significantly enhancing the overall structural stability and resistance to bending and torsion. This structure effectively improves the structural stiffness and load-bearing capacity of the floating foundation 10, allowing the first wind turbine 201 and the second wind turbine 202 to accommodate larger impellers 21, thereby increasing the total power capacity of the system and making it suitable for upwind conditions. Simultaneously, the angle α between the mounting plane of the impeller 21 and the first direction is 5° to 15°, and the angle β between the inclined support tower 11 and the first direction is 60° to 64°. By further defining the two included angles α and β, the risk of tower sweeping is further reduced, and the effective windward area of ​​the rotor 21 is effectively increased while the weight and wind load of the wind turbine 20 can be transferred to the floating foundation 10 and the bending stress of the tower is reduced, thereby improving the wind energy capture efficiency of the power generation system.

[0044] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A dual-impeller single-point moored power generation system, characterized in that, Including floating foundations (10) and wind turbine units (20); The floating foundation (10) includes two interconnected inclined support towers (11), floating piles (12), and connecting components (13). The two inclined support towers (11) are V-shaped and each inclined support tower (11) has a first end (113). The inclined support towers (11) and the floating piles (12), as well as the two inclined support towers (11), are fixedly connected by the connecting components (13). The wind turbine (20) includes a first wind turbine (201) and a second wind turbine (202), wherein the first wind turbine (201) and the second wind turbine (202) are respectively installed at the first ends (113) of the two inclined support towers (11); wherein, A horizontal cable (30) is provided between the two inclined support towers (11), and the two ends of the horizontal cable (30) are fixedly connected to the two inclined support towers (11) respectively.

2. The dual-impeller single-point moored power generation system according to claim 1, characterized in that, The connecting component (13) includes a middle crossbeam (131), the two ends of which are fixedly connected to the two inclined support towers (11), and the middle crossbeam (131) is arranged parallel to the horizontal cable (30).

3. The dual-impeller single-point moored power generation system according to claim 1, characterized in that, The connecting assembly (13) further includes a first inclined beam (133) and a second inclined beam (134), and the two inclined support towers (11) are respectively the first inclined support tower (111) and the second inclined support tower (112), wherein, One end of the first inclined beam (133) is fixedly connected to the first inclined support tower (111), and the other end is fixedly connected to the floating pile (12); one end of the second inclined beam (134) is fixedly connected to the second inclined support tower (112), and the other end is fixedly connected to the floating pile (12).

4. The dual-impeller single-point moored power generation system according to claim 3, characterized in that, The floating foundation (10) also includes a lower pontoon (40), which is connected to the end of the pontoon (12) away from the first inclined beam (133).

5. The dual-impeller single-point moored power generation system according to claim 4, characterized in that, The connecting assembly (13) includes a central crossbeam (131), the two ends of which are fixedly connected to the two inclined support towers (11), and the central crossbeam (131) is arranged parallel to the horizontal stay cable (30), wherein: There is a height difference between the projection of the lower floating box (40) and the intermediate crossbeam (131) in the first plane, and the projection of the lower floating box (40) is located on the side closer to the wind turbine (20) compared to the projection of the intermediate crossbeam (131).

6. The dual-impeller single-point moored power generation system according to claim 5, characterized in that, The dual-impeller single-point mooring power generation system (1) is symmetrically distributed with the plane formed by the plane where the diameter of the floating pile (12) is located and the line connecting the midpoint of the intermediate crossbeam (131) as the plane of symmetry.

7. The dual-impeller single-point moored power generation system according to claim 1, characterized in that, The first wind turbine (201) and the second wind turbine (202) both include an impeller (21) and a nacelle assembly (22) connected to each other. The nacelle assembly (22) is fixedly connected to the first end (113), and the impeller (21) is rotatably connected to the nacelle assembly (22).

8. The dual-impeller single-point moored power generation system according to claim 7, characterized in that, The angle α between the mounting plane of the impeller (21) and the first direction is 5° to 15°.

9. The dual-impeller single-point moored power generation system according to claim 1, characterized in that, The angle β between the inclined support tower (11) and the first direction is 60° to 64°.

10. The dual-impeller single-point moored power generation system according to claim 9, characterized in that, The angle γ between the inclined support tower (11) and the third direction is 6° to 12°.

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