Floating foundation and wind generating set

Abstract

The utility model relates to a floating foundation and a wind generating set, the floating foundation comprises a floating box assembly, the floating box assembly comprises a plurality of heaving boxes and bottom floating boxes, the connecting lines of the centers of the heaving boxes form a polygon, and the bottom floating boxes are connected between every two adjacent heaving boxes; the main stand columns are arranged between the heaving boxes and connected with the bottom floating box; each heaving box is connected with the corresponding side stand column, at least one side stand column comprises a main body part and a connecting piece, at least part of the connecting piece is inserted into the main body part, the connecting pieces are connected with the heaving boxes, and each main body part comprises one of a concrete body and a composite material body. According to the floating foundation and the wind generating set provided by the embodiment of the invention, the floating foundation can meet the requirement for supporting objects on the sea, and meanwhile, the construction cost can be reduced.

Description

Technical Field

[0001] The present application relates to the field of wind power technology, and in particular to a floating foundation and a wind turbine generator set. Background Art

[0002] In order to achieve the carbon peak target, the country vigorously develops renewable clean energy including wind power, hydropower, and solar energy to achieve energy structure transformation. Therefore, wind power, as an important component of clean energy, will be greatly developed.

[0003] my country has the natural advantages to develop offshore wind power. In shallow waters, fixed foundation structures are generally used. However, with the development of offshore wind power in recent years, the available sea area for fixed foundations is decreasing. For the sustainable development of offshore wind power, deep-sea floating wind power must be vigorously developed. However, the current design of floating wind power foundations is mostly based on the concept of traditional offshore engineering platforms, and the construction cost is much higher than that of fixed offshore wind power foundations. Summary of the invention

[0004] The embodiments of the present application provide a floating foundation and a wind turbine generator set. The floating foundation can meet the support requirements for objects at sea and can reduce construction costs.

[0005] On the one hand, according to an embodiment of the present application, a floating foundation is proposed, including: a pontoon assembly, including a plurality of heave boxes and a bottom pontoon, the center lines of the plurality of heave boxes are polygonal, and a bottom pontoon is connected between two adjacent heave boxes; main columns, arranged between the heave boxes and connected to the bottom pontoons; side columns, each heave box is respectively connected to a side column, at least one side column includes a main body and a connector at least partially inserted into the main body, the connector is connected to the heave box, and the main body includes one of a concrete body and a composite material body.

[0006] According to one aspect of an embodiment of the present application, the connecting member includes a first connecting portion, the first connecting portion includes one of an anchor cage, an anchor bolt, and a prestressed tendon, and the first connecting portion is connected to the heave box and the main body.

[0007] According to one aspect of an embodiment of the present application, the floating foundation also includes a connecting assembly, which includes a plurality of connecting rods, each side column is connected to the main column with a connecting rod, and along the axial direction of the main column, the height at which the connecting end of the connecting rod and the main column is higher than the height at which the connecting end of the connecting rod and the side column is located.

[0008] According to one aspect of the embodiment of the present application, the connecting member further includes a second connecting portion, the second connecting portion includes one of an embedded pipe and an embedded bolt, and the second connecting portion is connected to the connecting rod.

[0009] According to one aspect of an embodiment of the present application, the main column includes a first column segment and a second column segment distributed along its own axial direction, the radial dimension of the first column segment is smaller than the radial dimension of the second column segment, the first column segment is connected to the bottom buoyancy box, and the connecting rod is connected to the second column segment.

[0010] According to one aspect of an embodiment of the present application, the main column also includes a transition section, which is connected between the first column section and the second column section. Along the axial direction and from the first column section to the second column section, the cross-sectional area of ​​the transition section gradually increases, and the axial length of the transition section is greater than or equal to four times the difference in radial dimensions between the first column section and the second column section.

[0011] According to one aspect of the embodiment of the present application, the bottom pontoons are strip-shaped structures, each of which is enclosed to form a hollow area, and the floating foundation also includes a transfer beam. The main column is partially located in the hollow area, and transfer beams are respectively connected between the main column and each of the bottom pontoons.

[0012] According to one aspect of an embodiment of the present application, a center line connecting multiple heave boxes forms a regular polygon, and the axis of the main column coincides with the center of the regular polygon.

[0013] According to one aspect of an embodiment of the present application, at least one heave box has a cavity configured to accommodate seawater, and the floating foundation further includes a drive assembly configured to input or extract seawater into the cavity.

[0014] According to one aspect of the embodiments of the present application, at least one of the side columns has an inner cavity.

[0015] On the other hand, according to an embodiment of the present application, there is provided a wind turbine generator set, comprising the above-mentioned floating foundation; and a tower connected to a main column.

[0016] According to the floating foundation and wind turbine generator set provided by the embodiment of the present application, the floating foundation includes a pontoon assembly, a main column and a side column. The pontoon assembly includes a heave box and a bottom pontoon. The bottom pontoon can connect multiple heave boxes into a whole. The pontoon assembly can increase the displacement of the floating foundation as a whole and reduce the towing draft. The main column is arranged between the heave boxes and connected to the bottom pontoon, which can ensure the support requirements for structures such as towers. Since the side column includes a main body and a connector that is at least partially plugged into the main body, the connector is connected to the heave box, and the main body includes a concrete body and a composite body. The side column can provide a stable waterline and buoyancy support for the floating foundation, ensuring the stability of the overall support of the floating foundation. At the same time, its structural form can utilize the excellent pressure resistance and corrosion resistance of the concrete body and the composite body, and can reduce the cost of the floating body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0018] Figure 1 is a structural schematic diagram of a wind turbine generator set according to an embodiment of the present application;

[0019] Figure 2 This is a schematic diagram of the structure of a floating foundation according to an embodiment of the present application;

[0020] Figure 3 It is a partial structural cross-sectional view of a floating foundation according to an embodiment of the present application.

[0021] Marking Description:

[0022] 100. Floating foundation;

[0023] 10. buoyancy tank assembly; 11. heave tank; 111. cavity; 12. bottom buoyancy tank;

[0024] 20. Main column; 21. First column section; 22. Second column section; 23- Transition section;

[0025] 30, side column; 31, main body; 32, connecting piece; 321, first connecting part; 322, second connecting part; 30a-inner cavity;

[0026] 40. Transfer beam;

[0027] 50. Connecting assembly; 51. Connecting rod;

[0028] 200, tower; 300, nacelle; 400, impeller; 410, hub; 420, blade;

[0029] X, axial direction.

[0030] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0031] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0032] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the floating foundation 100 and the wind turbine generator set of the present application. In the description of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0033] like Figure 1 As shown, the embodiment of the present application provides a wind turbine generator set, including a floating foundation 100 and a wind turbine body, wherein the wind turbine body includes a tower 200, a nacelle 300, a generator and an impeller 400. The tower 200 is connected to the floating wind turbine buoy, the nacelle 300 is arranged at the top of the tower 200, and the generator is arranged in the nacelle 300. In some examples, the generator can be located outside the nacelle 300. Of course, in some examples, the generator can also be located inside the nacelle 300. The impeller 400 includes a hub 410 and a plurality of blades 420 connected to the hub 410. The impeller 400 is connected to the rotor of the generator through the hub 410, thereby driving the rotor to rotate relative to the stator to achieve the power generation demand of the wind turbine generator set. The floating wind turbine buoy floats in the seawater. In order to limit its range of motion, it is fixed to the seabed through a mooring system to achieve a certain range of motion.

[0034] Since there are huge differences between floating wind turbines and onshore wind turbines and offshore monopile fixed wind turbines, in terms of the overall system composition, floating wind turbines have their own unique buoyancy and mooring system and are widely used.

[0035] Currently, the design of floating foundations is mostly based on the concept of traditional offshore engineering platforms, and the construction cost is much higher than that of offshore fixed wind power foundations.

[0036] Based on this, an embodiment of the present application provides a new floating foundation 100, which can meet the support requirements for objects at sea and reduce construction costs.

[0037] like Figure 2 as well as Figure 3As shown, a floating foundation 100 provided by an embodiment of the present application includes a pontoon assembly 10, a main column 20 and a side column 30. The pontoon assembly 10 includes a plurality of heave boxes 11 and a bottom pontoon 12. The center line of the plurality of heave boxes 11 is polygonal, and a bottom pontoon 12 is connected between two adjacent heave boxes 11. The main column 20 is arranged between the heave boxes 11 and connected to the bottom pontoon 12. Each heave box 11 is respectively connected to a side column 30. At least one side column 30 includes a main body 31 and a connector 32 at least partially plugged into the main body 31. The connector 32 is connected to the heave box 11. The main body 31 includes one of a concrete body and a composite body.

[0038] The number of the heave boxes 11 included in the buoyancy box assembly 10 may be three, four or more, and the center line connecting the plurality of heave boxes 11 may be a triangle, a quadrilateral or a larger polygon.

[0039] The shape of the heave box 11 can be a circular box or a polygonal box.

[0040] A bottom buoyancy box 12 is connected between each adjacent two of the plurality of heave boxes 11, and the bottom buoyancy box 12 may be an integral polygonal structure, and the plurality of heave boxes 11 are connected by one bottom buoyancy box 12. Of course, the bottom buoyancy box 12 may also be a strip structure, and a bottom buoyancy box 12 is connected between each adjacent two of the heave boxes 11.

[0041] The heave tank 11 and the bottom buoyancy tank 12 may be connected by welding or by flanges and fasteners.

[0042] The main columns 20 and the bottom buoyancy tank 12 may be connected directly or indirectly.

[0043] The number of the side columns 30 may be the same as the number of the heave boxes 11 and they may be arranged one to one.

[0044] One side column 30 may include a main body 31 and a connecting piece 32 . Of course, all side columns 30 may include a main body 31 and a connecting piece 32 .

[0045] The main body 31 may include a concrete body or a composite material body. When the composite material body is included, the main body 31 may include a basalt fiber body, a glass fiber body, or the like.

[0046] The floating foundation 100 provided in one embodiment of the present application includes a pontoon assembly 10, a main column 20 and a side column 30. The pontoon assembly 10 includes a heave box 11 and a bottom pontoon 12. The bottom pontoon 12 can connect multiple heave boxes 11 into a whole. The pontoon assembly 10 can increase the overall displacement of the floating foundation 100 and reduce the towing draft. The main column 20 is arranged between each heave box 11 and connected to the bottom pontoon 12. When used for a wind turbine generator set, it can be connected to the tower 200 through the main column 20 to support the cabin 300, the generator, the impeller 400 and other components at a predetermined height of the corresponding sea area to ensure the conversion of wind energy into electrical energy. Since the side column 30 includes a main body 31 and a connector 32 at least partially inserted into the main body 31, the connector 32 is connected to the heave box 11, and the main body 31 includes one of a concrete body and a composite body, the setting of the side column 30 can provide a stable waterline and buoyancy support for the floating foundation 100, thereby ensuring the stability of the overall support of the floating foundation 100. At the same time, its structural form can utilize the excellent pressure resistance and corrosion resistance of the concrete body and the composite body, and can reduce the cost of the floating body.

[0047] In some optional embodiments, a floating foundation 100 provided by an embodiment of the present application, the connecting member 32 includes a first connecting portion 321, the first connecting portion 321 includes one of an anchor cage, an anchor bolt, and a prestressed tendon, and the first connecting portion 321 is connected to the heave box 11.

[0048] The first connection part 321 can be pre-embedded and inserted in the main body 31. For example, taking the main body 31 including a concrete body, the first connection part 321 can be placed in a mold in advance, and concrete slurry of a predetermined height is poured into the mold, and a concrete body is formed after solidification, that is, at least a part of the main body 31 is formed. The concrete body covers a part of the first connection part 321 and is fixedly connected thereto, thereby ensuring the connection strength between the two.

[0049] The first connection portion 321 and the heave box 11 may be connected by welding, or may be connected as a whole by fastener thread connection or the like.

[0050] The floating foundation 100 provided in one embodiment of the present application ensures the connection strength between the first connection part 321 and the main body 31, and at the same time ensures the connection strength between the main body 31 and the bottom buoyancy box 12 by making the connection member 32 include a first connection part 321 and limiting the structural form of the first connection part 321.

[0051] In some optional embodiments, an embodiment of the present application provides a floating foundation 100, wherein the floating foundation 100 further includes a connection assembly 50, wherein the connection assembly 50 includes a plurality of connection rods 51, each side column 30 is respectively connected to the main column 20 with a connection rod 51, and along the axial direction X of the main column 20, a height at which a connection end of the connection rod 51 and the main column 20 is located is higher than a height at which a connection end of the connection rod 51 and the side column 30 is located.

[0052] The number of connecting rods 51 included in the connecting assembly 50 may be equal to the number of side columns 30 , and of course, may also be greater than the number of side columns 30 .

[0053] The number of the connecting rods 51 connecting each side column 30 and the main column 20 may be one or more, and may be one.

[0054] The axial direction X of the main column 20 can be understood as the height direction of the main column 20. The height of the connecting end of the connecting rod 51 and the main column 20 is higher than the height of the connecting end of the connecting rod 51 and the side column 30, so that the connecting rod 51 is inclined relative to the horizontal plane.

[0055] The floating foundation 100 provided by one embodiment of the present application has a main column 20 located between each heave box 11, a side column 30 located on the heave box 11, and a connecting rod 51 arranged obliquely, so that the pontoon assembly 10, the main column 20, the side column 30 and each connecting rod 51 are enclosed to form a polyhedral truss structure. The bottom pontoon 12 can provide displacement to reduce towing draft, while increasing the mass of attached water in motion and improving the hydrodynamic performance of the foundation. The main column 20 and the connecting rod 51 transfer the tower bottom load to the mooring point in the form of axial force, and the floating foundation 100 as a whole can be more conducive to the transmission of the tower 200 load and the overall wave load. Reduce the bending moment of internal components, improve the structural bearing capacity, and reduce the structural weight.

[0056] Furthermore, the floating foundation 100 provided in one embodiment of the present application has a reasonable structural main body design so that the side columns 30 do not bear the overall force of the foundation, but only bear the sea water pressure, local wave loads, and local mooring forces, which is conducive to the realization of the main body 31 including a concrete body and a composite material body.

[0057] In some optional embodiments, in a floating foundation 100 provided by an embodiment of the present application, the connecting member 32 further includes a second connecting portion 322 , the second connecting portion 322 includes one of an embedded pipe and an embedded bolt, and the second connecting portion 322 is connected to the connecting rod 51 .

[0058] The second connection part 322 may include a pre-buried pipe or a pre-buried anchor bolt. The main body 31 may be connected to the connecting rod 51 through the second connection part 322. The second connection part 322 and the connecting rod 51 may be connected by threaded connection, plug-in connection, welding, etc. When threaded connection is adopted, the connecting rod 51 may be firstly threadedly connected and fixed to the second connection part 322 and then connected to the main column 20 by welding, etc. to form a whole.

[0059] The floating foundation 100 provided in one embodiment of the present application, through the above arrangement, facilitates the connection between the main body 31 and the connecting rod 51, ensures the overall strength of the floating foundation 100, improves the structural bearing capacity, and reduces the structural weight.

[0060] In some optional embodiments, the main column 20 includes a first column segment 21 and a second column segment 22 distributed along its own axial direction X, the radial dimension of the first column segment 21 is smaller than the radial dimension of the second column segment 22, the first column segment 21 is connected to the bottom buoyancy box 12, and the connecting rod 51 is connected to the second column segment 22.

[0061] The first column segment 21 and the second column segment 22 may be cylindrical structures or prismatic structures. When a prismatic structure is adopted, the radial dimension may be understood as the radial dimension of the circumscribed circle or inscribed circle of the orthographic projection of the prismatic structure on the axial direction X.

[0062] The floating foundation 100 provided in one embodiment of the present application has good overall force bearing, small horizontal resistance of seawater, and can reduce costs through the above configuration.

[0063] In some optional embodiments, in a floating foundation 100 provided by an embodiment of the present application, the main column 20 further includes a transition section 23, and the transition section 23 is connected between the first column section 21 and the second column section 22. Along the axial direction X and from the first column section 21 to the second column section 22, the cross-sectional area of ​​the transition section 23 gradually increases, and the length dimension of the transition section 23 in the axial direction X is greater than or equal to four times the difference in radial dimensions between the first column section 21 and the second column section 22.

[0064] The transition section 23 as a whole may adopt a truncated cone structure or a truncated pyramid structure.

[0065] The floating foundation 100 provided in one embodiment of the present application, through the above-mentioned configuration, enables the first column section 21 and the second column section 22 of the main column 20 to gradually transition, thereby ensuring the overall strength of the main column 20 and avoiding local stress concentration that affects the safety of the floating foundation 100.

[0066] In some optional embodiments, a floating foundation 100 provided by an embodiment of the present application, the bottom pontoon 12 is a strip-shaped structure, and each bottom pontoon 12 is surrounded to form a hollow area. The floating foundation 100 also includes a transfer beam 40, and a main column 20 is partially located in the hollow area. The main column 20 and each bottom pontoon 12 are respectively connected with a transfer beam 40.

[0067] The transfer beam 40, the main column 20 and the bottom buoyancy box 12 can be connected by welding or other methods. The hollow area enclosed by the bottom buoyancy box 12 can be a triangular cavity, a square cavity or a more polygonal cavity.

[0068] The transfer beam 40 may be connected to the middle of the bottom buoyancy tank 12 or a position close to the middle.

[0069] The floating foundation 100 provided in one embodiment of the present application reduces the weight of the pontoon assembly 10 and reduces the cost through the above-mentioned configuration while ensuring support for the main columns 20 and the side columns 30 . It can also reduce floating resistance and ensure the stability of the floating foundation 100 .

[0070] In some optional embodiments, in a floating foundation 100 provided by an embodiment of the present application, a center line connecting a plurality of heave boxes 11 forms a regular polygon, and an axis of a main column 20 coincides with the center of the regular polygon.

[0071] In some optional embodiments, in a floating foundation 100 provided by an embodiment of the present application, a center line connecting a plurality of heave boxes 11 forms a regular polygon, and an axis of a main column 20 coincides with the center of the regular polygon.

[0072] The distances from the axis of the main column 20 to the center of each heave box 11 may be equal.

[0073] When the transfer beams 40 are included, the lengths of the transfer beams 40 can be equal and spaced and evenly arranged in the circumferential direction of the main column 20 . Each transfer beam 40 can be connected to the middle position of the bottom pontoon 12 .

[0074] The floating foundation 100 provided in one embodiment of the present application, through the above configuration, makes the force evenly distributed in various parts of the floating foundation 100, improves the overall stability of the floating foundation 100, and avoids the occurrence of unbalanced load shaking of the main column 20 and the like.

[0075] In some optional embodiments, a floating foundation 100 provided by an embodiment of the present application, at least one heave box 11 has a cavity 111, and the cavity 111 is configured to accommodate seawater. The floating foundation 100 also includes a drive assembly, and the drive assembly is configured to input or extract seawater into the cavity 111.

[0076] One of the heave boxes 11 may have a cavity 111, or each of the heave boxes 11 may have a cavity 111. The drive assembly may be connected to the buoyancy box assembly 10. When more than two heave boxes 11 have cavities 111, each heave box 11 may be provided with a corresponding drive assembly, or more than two heave boxes 11 may be provided with a corresponding drive assembly. The volume of seawater in the cavity 111 in each heave box 11 may be independently controlled by the drive assembly. The drive assembly includes but is not limited to a drive pump assembly, etc.

[0077] The floating foundation 100 provided in one embodiment of the present application can, through the above-mentioned configuration, adjust the volume of seawater in the heave box 11 at the corresponding position according to the ballast demand, displacement demand, wind direction, wind speed, etc., so as to adjust the ballast capacity of the heave box 11 at the corresponding position and improve the reliability of the floating foundation 100.

[0078] In some optional embodiments, in a floating foundation 100 provided by an embodiment of the present application, at least one side column 30 has an inner cavity 30a, and the inner cavity 30a can extend along the axial direction X.

[0079] By providing the inner cavity 30a, it is possible to reduce weight and ensure the floating requirement of the floating foundation 100, and at the same time, it is possible to further achieve the cost reduction requirement.

[0080] In some optional embodiments, the floating foundation 100, the heave box 11, the bottom buoyancy box 12, the main column 20, the connecting rod 51, the transfer beam 40, etc. provided in an embodiment of the present application can be made of metal materials, and can optionally be made of steel.

[0081] On the other hand, an embodiment of the present application provides a wind turbine generator set, which includes the floating foundation 100 provided by the above-mentioned embodiments, and can ensure the conversion of offshore wind energy into electrical energy. Since the side column 30 includes a main body 31 and a connector 32 at least partially inserted into the main body 31, the connector 32 is connected to the heave box 11, and the main body 31 includes a concrete body and a composite body. The setting of the side column 30 can provide a stable waterline surface and buoyancy support for the floating foundation 100, thereby ensuring the stability of the overall support of the floating foundation 100. At the same time, its structural form can utilize the excellent pressure resistance and corrosion resistance of the concrete body and the composite body to perform structural replacement in the side column 30, thereby reducing the floating body cost and ensuring the power generation efficiency of the wind turbine generator set itself.

[0082] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A floating foundation, characterized in that: include: A buoyancy box assembly includes a plurality of heave boxes and a bottom buoyancy box, wherein the center line connecting the plurality of heave boxes is a polygon, and the bottom buoyancy box is connected between two adjacent heave boxes; A main column, disposed between the heave boxes and connected to the bottom buoyancy box; Side columns, each of the heave boxes is respectively connected to the side columns, at least one of the side columns includes a main body and a connector at least partially inserted into the main body, the connector is connected to the heave box, and the main body includes one of a concrete body and a composite material body.

2. The floating foundation according to claim 1, characterized in that: The connecting member includes a first connecting portion, which includes one of an anchor cage, an anchor bolt, and a prestressed tendon, and the first connecting portion is connected to the heave box and the main body.

3. The floating foundation according to claim 1, characterized in that: The floating foundation also includes a connection assembly, which includes a plurality of connection rods, each of which is connected to the main column. Along the axial direction of the main column, the height at which the connection end of the connection rod and the main column is higher than the height at which the connection end of the connection rod and the side column is located.

4. The floating foundation according to claim 3, characterized in that: The connecting member further includes a second connecting portion, the second connecting portion includes one of a pre-buried pipe and a pre-buried bolt, and the second connecting portion is connected to the connecting rod.

5. The floating foundation according to claim 3, characterized in that: The main column includes a first column segment and a second column segment distributed along its own axial direction. The radial dimension of the first column segment is smaller than the radial dimension of the second column segment. The first column segment is connected to the bottom buoyancy box, and the connecting rod is connected to the second column segment.

6. The floating foundation according to claim 5, characterized in that: The main column also includes a transition section, which is connected between the first column section and the second column section. Along the axial direction and from the first column section to the second column section, the cross-sectional area of ​​the transition section gradually increases, and the length dimension of the transition section in the axial direction is greater than or equal to four times the difference in radial dimensions between the first column section and the second column section.

7. The floating foundation according to any one of claims 1 to 6, characterized in that: The bottom pontoon is a strip-shaped structure, each of which is enclosed to form a hollow area. The floating foundation also includes a transfer beam. The main column is partially located in the hollow area. The main column and each of the bottom pontoons are respectively connected with the transfer beam.

8. The floating foundation according to any one of claims 1 to 6, characterized in that: The center line connecting the plurality of heave boxes forms a regular polygon, and the axis of the main column coincides with the center of the regular polygon.

9. The floating foundation according to any one of claims 1 to 6, characterized in that: At least one of the heave boxes has a cavity, the cavity is configured to contain seawater, and the floating foundation further includes a drive assembly, the drive assembly is configured to input or extract the seawater into the cavity; And / or, at least one of the side columns has an inner cavity.

10. A wind turbine generator set, characterized in that: include: The floating foundation according to any one of claims 1 to 9; A tower frame is connected to the main column.

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