A floating platform for wind power generation equipment, especially in the ocean, with improved stability.

Abstract

The present invention relates to a floating platform (2), particularly a platform (2) for a wind turbine, in which stability can be improved by the arrangement of fixing tendons (17, 18). The present invention also relates to a method for assembling such a platform with a wind turbine, and a method for fixing the platform to the sea.

Description

Technical Field

[0001] The present invention relates to platforms in the ocean, particularly to the field of platforms serving as supports for offshore wind power generation devices.

Background Art

[0002] Particularly, a platform serving as a support for an offshore wind power generation device must be as stable as possible in order to guarantee electricity production under conditions such as high waves or strong winds within the usage limits determined by the manufacturer. In fact, for example, when the wind speed exceeds a certain value such as 80 kilometers per hour, the system automatically stops power generation.

[0003] Furthermore, if the platform is more stable, it can make access to the wind power generation device even easier; thus, the maintenance cost of the wind power generation device is reduced. Therefore, by reducing the stress borne by the wind power generation device, the need for maintenance and wear are decreased, and the lifespan is extended, so productivity is increased.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The object of the present invention relates to a floating platform with improved stability and a method for installing an offshore wind power generation device using such a platform.

Means for Solving the Problems

[0005] According to a first object of the present invention, a floating platform, particularly an offshore floating platform, configured to support equipment and organized around a substantially vertical main shaft, comprises a floating body, a plurality of tendons, mounting means for holding the upper end of each tendon to the floating body, and anchoring means for fixing the lower end of each tendon to the seabed, wherein the tendons include at least three vertically positioned first type tendons and at least three diagonally positioned second type tendons between the mounting means and the anchoring means, the first and second types of tendons are arranged alternately around the main shaft, and in the operating position, the floating body is immersed and held at a water level below the mean water level, and at least the vertically positioned tendons are held under tension.

[0006] Preferably, all of the diagonally positioned tendons form the same angle with respect to the main axis, preferably more than 5 degrees.

[0007] The diagonally positioned tendons can preferably be cylindrical rigid rods. Advantageously, each end of each tendon is connected to a mounting or anchoring means by a ball joint means. Also advantageously, the mounting means is configured to transmit only tensile stress to the upper end of the diagonally positioned tendon.

[0008] The diagonally positioned tendons may consist of strands of continuous cable pulled between a pulley supported by a floating body and pulleys supported by individual anchors of the anchoring means.

[0009] The floating body is a rotating body centered on a main axis, and is preferably annular in shape.

[0010] The platform includes a raised section and a base section for the equipment, the base section being positioned on the raised section, the raised section extending upward from the floating body, and configured such that, in the operational position, there is an air draft beneath the base section. Advantageously, it includes a structure having means for wave and wind permeability, preferably a truss structure, and more preferably a structure having columns and substantially horizontal bars connecting the columns. Preferably, the raised section is substantially a rotating body about a main axis.

[0011] Furthermore, the system may include an inflatable buoy that can ensure the buoyancy of the platform whether the floating body is fully or partially ballasted. Such a buoy is particularly useful during the tendon fastening stage or when the platform's immersion volume is reduced due to trouble.

[0012] A second object of the present invention is an assembly comprising a platform according to the present invention and equipment supported by the platform.

[0013] If the platform of this assembly includes a base, the equipment may include a base that, together with the base of the platform, forms swiveling means. In that case, the equipment may include counterweight means extending downward from the base through the platform, which preferably include a rod extending downward from the base and a weight fixed to the lower end of the rod, and the base includes an axial passage for this rod. The equipment may be a wind turbine comprising a propeller having a rotation axis and swiveling means having a center of rotation substantially on this rotation axis.

[0014] A third object of the present invention is a method for assembling a platform according to the present invention, which includes: -Make the quay usable; - Multiple assembly work areas were arranged along the quay; -Make a submersible barge available; - To manufacture the floating structure, barges are placed in one or more workshops; then, -Place the barge in one or more work areas to attach the raised section and the base section; then, - To attach the equipment to the platform, the barges are positioned in one or more work areas; then, -Place the barge in another workshop; then, - Add ballast to the barge until the buoyancy of the assembled structure is guaranteed by the floating body alone.

[0015] A fourth object of the present invention is a method for mooring the assembly according to the present invention to a site selected for use therein, the method being - The step of positioning anchor means at the desired location according to the template; - The step of fixing the tendon to the anchoring means, - The step of guiding the assembly to the desired position by buoyancy; -Steps to expand the buoyancy method; - The step of adding ballast to the floating body until it is fully submerged; - A step of fixing the upper end of the tendon to the floating body; -Steps to remove the ballast from the floating structure; - The step of deflating the buoy, Includes.

[0016] The following describes various embodiments and variations of this model, not as an exhaustive list, but as examples, with reference to the attached drawings. [Brief explanation of the drawing]

[0017] [Figure 1] This is a schematic elevation view showing an assembly including a wind turbine mounted on a floating platform according to the present invention. [Figure 2] Figure 1 is a schematic diagram showing a seabed floating structure for the platform and a first deployment mode for the tendon. [Figure 3]A schematic diagram showing a floating body for the platform of FIG. 1 and a second arrangement mode for the tendon. [Figure 4] A schematic partial cross-sectional elevation perspective view of the platform of FIG. 1. [Figure 5] A schematic elevation perspective view showing the floating body of the platform of FIG. 1. [Figure 6] A schematic elevation perspective view showing the rotational support structure for the platform of FIG. 1. [Figure 7] A schematic elevation perspective view showing the assembly method and the assembly workplace on the quay wall for the assembly of FIG. 1. [Figure 8] A schematic elevation view showing the step of placing the assembly of FIG. 1 in the ocean. [Figure 9] A schematic diagram showing a subsea floating body for the platform of FIG. 1 and a second embodiment for the tendon, with these tendons formed from a pulley system.

Embodiments for Carrying out the Invention

[0018] In the description of the present invention, terms such as "upper", "lower", "above", "below", "horizontal", "vertical" and other similar terms are arbitrarily used. Generally, these refer to the illustrated positions.

[0019] FIG. 1 shows an offshore wind power assembly 1. This assembly is substantially symmetric about a vertical main axis X1 and particularly includes a floating platform 2 and a wind power device 3. The wind power device is installed on the platform 2. The platform is fixed to the seabed 4 by an anchor 6.

[0020] The platform includes an annular floating body 8 centered on a main axis X1; in the use position shown in Figure 1, this floating body is immersed and held below an immersion water level HS measured from the top surface of the floating body to the mean water level NS of the water surface S. The platform also includes a riser 9 attached to the floating body, which extends to a water level H9 above the immersion water level HS, so that the platform reaches an air draft HA = H9 - HS above the mean water level NS. The immersion water level HS is selected so that the stress on the riser is barely or undetectable by the floating body. Generally, the immersion water level is selected between 8 and 15 meters depending on the platform's installation location.

[0021] This float is sealed. The buoyancy volume of the float is calculated to determine a thrust according to Archimedes' principle such that it exceeds the sum of the total weight of assembly 1 and the force that the assembly can experience under the strongest foreseeable storm conditions.

[0022] The platform further includes a base 10 attached to the top of the raised section 9, which is for mounting equipment. In the illustrated embodiment, the equipment supported by the platform is a wind turbine 3. The wind turbine includes a cylindrical, hollow mast 11 extending upward from the base 10, a nacelle 12 positioned on top of the mast 11, and a three-bladed propeller 13 fixed to the nacelle 12. The propeller 13 moves about a substantially horizontal propeller rotation axis X13.

[0023] The water depth H4 above the seabed 4 beneath the floating body 8 can exceed 70 meters. The platform includes a mooring system 16 for securing to an anchor 6. This system includes eight tendons 17, 18, of which four are vertical tendons 17 and four are diagonal tendons 18.

[0024] The tendons used in the embodiments shown in Figures 1 and 4 are nearly rigid metal tubes whose length is adapted to the irregularities of the seabed 4. The resulting length difference is small with respect to the water depth H4 and can be ignored, thus having little effect on the operation of the mooring system. The diameter of the tube is determined by the mechanical properties of the tube that allow the tube to remain at the yield point under maximum stress. In the embodiments, these tubes have a diameter of 800 millimeters and a thickness of 30 millimeters.

[0025] In the embodiment shown in Figure 9, the angled tendon 18 is formed from a continuous cable connected to the anchor 6 and the floating body 8 by a pulley system. Such an angled tendon system, formed from a cable and pulley system, can withstand particularly very high stresses.

[0026] In particular, as shown in Figure 5, the floating body 8 has an annular shape with a rectangular radial cross-section. The floating body includes radial partitions 21 regularly distributed around the main axis X1. In the illustrated embodiment, there are a total of eight partitions 21. The partitions 21 divide the floating body into eight independent sealed caissons. The partitions further constitute reinforcing members to allow the floating body to withstand water pressure. The floating body also includes eight mounting fixtures 22. In the embodiment of Figure 5, each mounting fixture is positioned on the lower edge 23 of the cylindrical outer wall 24 of the floating body. In the illustrated embodiment, each mounting fixture 22 is tab-shaped. Each mounting fixture is formed on the radial extension of one of the eight radial walls. Each mounting fixture is configured to hold the upper end of each of the eight tendons. Spherical guide means allow the mounting fixtures to be rotatable.

[0027] Since each upper end of the vertical tendon 17 is fixed to its individual mounting fixture 22, the fixture does not slide vertically along the tendon.

[0028] Each upper end of the slanted tendon 18 is held by the individual fitting by a stopper 26 (see Figure 4) fixed to the tendon and positioned on the top of the fitting. In this configuration, the fitting can transmit tensile stress to the tendon, but hardly transmits buckling stress. Furthermore, each upper or lower end of each tendon 17, 18 forms a ball joint with the individual fitting. As a result, very little compressive force is transmitted to the slanted tendon.

[0029] Each diagonal tendon 18 is also connected by its lower end to an individual anchor by an individual ball joint mechanism. Each diagonal tendon is positioned approximately in the radially vertical plane containing the main shaft X1. Each axial plane containing a diagonal tendon is angularly equidistant from two axial planes containing vertical tendons. Thus, the tendons are arranged alternately around the main shaft X1; that is, one encounters vertical tendons and then diagonal tendons alternately around the main shaft X1.

[0030] In the embodiments shown in Figures 1, 3, 4, and 8, the tendon is located on the outside, meaning that as it moves from top to bottom, it moves away from the main spindle X1.

[0031] In the embodiment shown in Figure 2, the tendon is located on the inside, meaning that as it moves from top to bottom, the tendon approaches the spindle X1. In the embodiment shown in Figure 2, the lower end of the tendon 18 is almost connected to the spindle X1.

[0032] Preferably, the diagonal tendon 18 forms an angle A18 greater than 5 degrees with the vertical line.

[0033] In the illustrated embodiment, the riser 9 is approximately frustoconical in shape. The riser includes inclined columns 31 regularly arranged around the main axis X1, which extend from bottom to top along the conical generatrix. The riser also includes horizontally positioned hoops 32, which connect the columns to each other to prevent buckling of the columns under the weight of the foundation and the weight of the equipment, in this case the weight of the wind turbine 3. The riser can be manufactured, for example, from steel or concrete, or a combination of these two materials.

[0034] The shape of the raised section 9, which has a very large number of openings, allows wind and wave stresses to pass through almost completely, and the stress they experience when passing through the raised section is reduced.

[0035] The base 10 is shaped like a spherical cradle with a concave surface towards the top, its axis of rotation is the main shaft X1, and its center of rotation is very close to the axis of rotation X13 of the propeller 13. In the illustrated embodiment, the base has a structure 34 formed from radial beams 35 and concentric rings 36. The beams extend almost horizontally in the radial direction relative to the main shaft X1, and are preferably made of metal, and are hollowed out near their neutral axis. As a result, such a structure consisting of hollowed-out beams and rings is lightweight, which helps to keep the center of gravity low relative to the assembly 1.

[0036] Among the concentric rings, the central ring 36C forms a cylindrical free passage 37 centered on the main shaft X1.

[0037] In the illustrated embodiment, the mast of the wind turbine is a substantially cylindrical hollow mast centered on a main shaft X1. The mast is mounted on a base. The mast has, on the one hand, a substantially spherical base 41 that is convex downwards, and this base is configured to be mounted at least indirectly on the base and together with the base to form a quasi-ball joint, and on the other hand, a similar concave surface with the center of the base as its focal point. The center of the spherical base 41 is approximately the same as the center of rotation of the base. For safety, this concave surface is guided with a gap within a cover, and the lower part of the cover is a convex spherical surface with the same center as the center of the base.

[0038] Multiple connecting means can be provided between the base 41 and the foundation 10. For example, ball bearings can be used. Alternatively, elastic contact, such as neoprene bearings, may be used. In practice, the maximum angular movement is very small, around 0.05 degrees. That is, for a mast 120 meters or taller, the movement is less than 9 centimeters.

[0039] In particular, as shown in Figure 1, the wind turbine 3 has a rod 42 that extends almost vertically downward from the base 41 of the mast. The rod is almost rigid and is firmly fixed to the base. The rod passes through a passage 37 within the foundation 10. The rod supports a weight 43 at its lower end.

[0040] The weight is positioned inside the cylindrical internal space consisting of the annular float 8. The rod 42 is preferably a steel tube. The weight 43 can be of any shape and, in particular, may include a generator propeller.

[0041] In particular, as shown in Figure 4, the platform 2 includes an inflatable buoy 46 positioned inside the raised section 9 beneath the base section 10. The buoy is preferably bellows-shaped and made of a neoprene-type material. As shown in Figure 8, the buoy is hollow cylindrical with a rod 42 passing through its internal space.

[0042] In Figure 4, the buoy is shown deflated and therefore does not come into contact with the water. In Figure 8, the buoy 46 is shown inflated and extends downward below the water surface S from the base 10 into the internal space 44 of the floating body 8.

[0043] During inflation, the buoy is guided vertically by vertical guides 47. For each guide 47, the buoy includes a rail 50 on its lower periphery 45, and each rail slides and guides the buoy during inflation. In the embodiment shown in Figure 4, there are a total of three guides, but there may be more.

[0044] Each guide is fixed on one side to the base 10 and on the other side to the inner wall 48 of the floating body, and fixed at the free end of a cantilever structure 49 that extends radially from the wall 48 toward the main axis X1. The cantilever structure advantageously acts as a stopper against the downward deployment of the buoy when the buoy is inflated.

[0045] Preferably, in the bulging position, the lower edge of buoy 46 is above the free-floating surface of the platform. Free-floating refers to the floating state of the platform when it is not being pulled toward the seabed by tendons 17 and 18 and is floating freely.

[0046] At its bulging position, the buoy, together with the floating body 8, the raised section 9, and the base 10, forms a nearly rigid assembly.

[0047] The buoy constitutes a safety structure to prevent damage to assembly 1. Therefore, if, for example, the sealing of the caisson of the floating body is compromised or the tendon is damaged, the platform includes means for immediately inflating the buoy to keep the assembly afloat until the platform is repaired.

[0048] Anchors 6 are, advantageously, suction anchors. These are also fixed to the piles. A template is preferably used to install the anchors as accurately as possible and to allow for good placement of the tendons.

[0049] Next, the assembly method of the power generation assembly according to the present invention will be described with reference to Figures 7 and 8.

[0050] According to the present invention, assembly is carried out on an assembly line 100 which includes multiple workshops. The line 100 shown in Figure 7 includes five workshops P1-P5 arranged along a quay (not shown), with each workshop corresponding to an individual assembly stage.

[0051] A submersible barge (not shown) allows the assembly to be moved parallel to the quay from one work area to the next during assembly.

[0052] In the first workshop P1, since the floating structure described here is made of reinforced concrete, formwork 99, which will serve as a mold for the concrete of the floating structure, is assembled on the barge. The reinforcing steel framework for the concrete is placed within this formwork. Inserts are incorporated therein, in particular for the tendon fittings 22 and the ballast piping for the caisson.

[0053] In the second workshop P2, concrete is preferably poured continuously to avoid construction joints, which could induce cracks that impair the airtightness of the floating structure. Then, once sufficient strength is reached, the formwork of the floating structure 8 is removed. Alternatively, the type of formwork described in French Patent Application Publication No. 3111651 under the name of Coffratherm can also be used. In the third workshop P3, the raised section 9 and the foundation section 10 are attached to the floating structure 8 thus formed.

[0054] In the fourth workshop P4, the wind power generation device 3 is attached to the platform 2 formed in this manner.

[0055] In the fifth workshop P5, once Assembly 1 is formed in this manner, ballast is placed in the barge, and the barge is removed from between the harbor bottom and the floating structure. In this case, the buoyancy of Assembly 1 is ensured by the floating structure.

[0056] Next, enter the sixth workshop P6, which is responsible for the installation of Assembly 1.

[0057] As shown in Figure 8, the assembled assembly 1 is transported to the sea by the tugboat 102 and fixed in place at the operating site. To increase the stability of the assembly during towing, it is temporarily moved out of the construction area, and as soon as the water depth is sufficient, the center of gravity of the assembly is lowered. Therefore, ballast is placed in the caisson, taking care to maintain positive buoyancy.

[0058] Preferably, three tugboats arranged radially are used. Two of them are visible in the diagram.

[0059] Anchor 6 and tendons 17 and 18 are pre-positioned on seabed 4. The tendons are held nearly vertically. The assembly is positioned directly above the anchor. If this is not done during the towing phase, buoy 46 is fully inflated and ballast is added to the floating body so that residual buoyancy is provided by buoy 46. The depth to which the floating body is submerged can be controlled by the use of the buoy.

[0060] Once the floating body reaches the appropriate depth, first fix the vertical tendon 17, and then fix the diagonal tendon 18 to it.

[0061] Next, the ballast is removed from the floating body 8, thereby applying tensile force to the tendons 17 and 18. Then, the buoy 46 is deflated. In this case, the buoyancy of assembly 1 is ensured by the internal volume of the air-filled floating body. Such an assembly can generally have a volume of 21,000 cubic meters and a weight of 12,000 tons.

[0062] The assembly is now operational and can be put into use as soon as it is electrically connected to the power grid or energy storage unit.

[0063] This assembly method minimizes the amount of work that needs to be done at sea. It also accelerates the production of large numbers of assemblies. This is particularly advantageous for wind farm complexes that may include hundreds of wind turbines.

[0064] The internal volume of the floating structure on the seabed shall exceed the volume required to maintain the resulting upward thrust while balancing the weight of the floating structure itself, the weight of all equipment, especially the weight of the wind turbines, and the vertical thrust of the 100-year periodic waves acting on the floating structure. This upward thrust shall be able to pull and hold at least the vertical tendons. Furthermore, this internal volume shall be calculated so that the water draft of Assembly 1 is sufficiently shallow in order to remove the barge at Work Area 5 and then to tow the assembly to the sea within the port where the assembly was assembled.

[0065] Figure 9 shows that the slanted tendon consists of a cable 101 pulled by a pulley 102, forming a pulley-type lifting system. In the illustrated embodiment, a single cable is used.

[0066] The upper connector 122 and the individual pulleys 102 form means for attaching the cable 101 to the floating body 8. The lower connector 120 and the individual pulleys 102 form means for attaching the cable to the individual anchors 6. Preferably, the connectors 120 and 122 are connected so that the pulleys can freely change direction under the stress exerted on each pulley by the tension of the cable 101.

[0067] As illustrated, if one anchor 6 includes a single pulley 102, the opposing mounting means 22 includes two pulleys, and conversely, if one anchor 6 includes two pulleys 102, the opposing mounting means includes two pulleys. In this way, each oblique tendon 18 is formed from two strands 118 of the cable 101. These two strands 118 of the same tendon 18 are parallel to each other.

[0068] Each pulley 102 of the mounting means, which includes two pulleys, is connected by an inclined strand 119 of the cable 101 to another pulley of an adjacent anchor, which also includes two pulleys.

[0069] Naturally, the present invention is not limited to the embodiments described above. On the contrary, the present invention is defined by the claims described later.

[0070] In fact, experts in the technology can make various modifications to the above embodiments in light of the described disclosures.

[0071] Therefore, the annular float may have a trapezoidal or arbitrary cross-section instead of a rectangular one. The float may also have an annular shape. In one embodiment without a balancing device, the float does not have to be annular and therefore does not have to include a central cutout.

[0072] The floating body is preferably made of concrete. The floating body can also be made of steel, or any other material compatible with the applied stress and marine environment.

[0073] The frame plates of the raised section are shown in the shape of an arc connecting two adjacent support columns. These can be replaced or complemented, for example, by straight, horizontal, or diagonal rods that connect or do not connect two adjacent support columns.

[0074] The number of tendons may differ from the number above; for example, there may be four vertical tendons and four diagonal tendons. There may be three or more tendons of each type.

[0075] Therefore, the number of tendons of one type can be a multiple of the number of tendons of another type. For example, it can have three diagonal tendons and six diagonal tendons. In this case, when alternating tendons, it can be two vertical tendons followed by one diagonal tendon, then two vertical tendons, then one diagonal tendon, and so on.

[0076] All or part of the mounting fixture 22 may be placed on the lower edge of the inner wall 48 instead of being distributed around the outer lower edge 23 of the floating body.

[0077] The platform can accommodate all types of wind turbines, especially those with high power outputs exceeding 15 megawatts.

[0078] The described type of platform can support any type of equipment other than wind turbines. Such equipment may be, for example, a boring machine, or it may have an area configured to accommodate technical facilities or residential buildings.

[0079] The placement of the tendons appears to guarantee almost perfect stability of the assembly. Therefore, the platform will be virtually unaffected by high waves and wind, and power generation will be limited only by the maximum rotational speed permitted by the turbine blades of the wind turbine. Furthermore, the stability of the assembly will reduce maintenance costs and extend the lifespan of the assembly.

Claims

1. A floating platform (2) configured to support equipment (3) and organized around a substantially vertical main axis (X1), particularly an offshore floating platform, includes a floating body (8), a plurality of tendons (17, 18), mounting means (22) for holding the upper end of each tendon to the floating body, and anchoring means (6) for fixing the lower end of each tendon to the seabed (4), The plurality of tendons include at least three vertically positioned first type tendons (17) and at least three diagonally positioned second type tendons (18) between the mounting means and the anchoring means. A platform characterized in that the first and second types of the plurality of tendons are arranged alternately around the main shaft (X1), and in the operating position, the floating body (8) is immersed and held at a water level (HS) below the mean water level (S), and at least the vertically arranged tendons (17) are held under tension.

2. The platform according to claim 1, characterized in that all of the diagonally arranged tendons (18) form the same angle (A18) with respect to the main axis (X1), preferably more than 5 degrees.

3. The platform according to any one of claims 1 and 2, characterized in that the diagonally positioned tendons are preferably cylindrical rigid rods.

4. The platform according to claim 3, characterized in that each end of the plurality of tendons (17, 18) is connected to the mounting means or the anchoring means by ball joint means.

5. The platform according to any one of claims 3 and 4, characterized in that the mounting means (22) is configured to transmit only tensile stress to the upper end of the diagonally positioned tendon (18).

6. The platform according to any one of claims 1 and 2, characterized in that the diagonally positioned tendons (18) are formed from strands (118) of a continuous cable (101) that are pulled between a pulley (102) supported by the floating body (8) and a pulley (102) supported by an individual anchor of the anchoring means (6).

7. The platform according to any one of claims 1 to 6, wherein the floating body (8) is a rotating body about the main axis and is preferably annular in shape.

8. The platform according to any one of claims 1 to 7, further comprising a raised section (9) and a base section (10) for the equipment, wherein the base section is positioned on the raised section, the raised section extends upward from the floating body (8), and the platform is configured such that, at the point of use, there is an air draft (HA) below the base section.

9. The platform according to claim 8, characterized in that it includes a structure having means for the transmission of waves and wind (31, 32), preferably a truss structure, and more preferably a structure having columns (31) and substantially horizontal bars (32) connecting the columns.

10. Furthermore, the platform according to any one of claims 1 to 9, characterized in that it includes an inflatable buoy means (46) capable of ensuring the buoyancy of the platform when the floating body (8) is completely filled with ballast.

11. An assembly (1) comprising a platform (2) according to any one of claims 1 to 10 and equipment (3) supported by the platform.

12. The assembly according to claim 11, comprising the platform according to claim 8, wherein the equipment (3) includes a base (41) that, together with the foundation (10) of the platform, forms a rotating support means.

13. The assembly according to claim 12, comprising counterweight means (42, 43) extending downward from the base (41) through the platform (2), wherein the counterweight means preferably comprises a rod (42) extending downward from the base and a weight (43) fixed to the lower end of the rod, and the base comprises an axial passage (37) for the rod.

14. The assembly according to any one of claims 12 and 13, wherein the equipment is a wind power generation device (3) equipped with a propeller (13) having a rotating shaft (X13), and the rotation support means has a center of rotation substantially on the rotating shaft (X13).

15. In the platform assembly method described in claim 9, - Make the quay available for use; - Multiple assembly work areas (P1-P5) are arranged along the aforementioned quay; - Make floodable barges available; - To manufacture the floating body (8), barges are placed in one or more workshops (P1-P2); then, - To attach the raised section (9) and the base section (10), the barge is placed in one or more work areas (P3); then, - To attach the equipment to the platform, the barge is positioned in one or more work areas (P4); then, - Place the barge in another workspace (P5); then, - Add ballast to the barge until the buoyancy of the assembled assembly is guaranteed by the floating body alone. A method for assembling a platform according to claim 9, characterized by including the following:

16. A method for mooring an assembly (1) according to any one of claims 12 to 14, which includes a platform (2) according to claim 10, - The step of positioning the anchor means (6) at a desired position according to the template; - The step of fixing the tendons (17, 18) to the anchor means, - The step of guiding the assembly to the desired position by buoyancy; - The step of inflating the buoy means (46); - The step of adding ballast to the floating body until it is fully submerged; - The step of fixing the upper end of the tendon to the float; - The step of removing the ballast from the floating body, - The step of deflating the buoy means, A method characterized by including the following.

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