CN115258071A - Diversion type offshore wind power generation platform and offshore wind power generation system - Google Patents
Diversion type offshore wind power generation platform and offshore wind power generation system Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/20—Adaptations of chains, ropes, hawsers, or the like, or of parts thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/20—Adaptations of chains, ropes, hawsers, or the like, or of parts thereof
- B63B2021/203—Mooring cables or ropes, hawsers, or the like; Adaptations thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
- B63B2035/4433—Floating structures carrying electric power plants
- B63B2035/446—Floating structures carrying electric power plants for converting wind energy into electric energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
Abstract
The invention belongs to the technical field of offshore wind power, and particularly relates to a diversion type offshore wind power generation platform and an offshore wind power generation system. The diversion type offshore wind power generation platform comprises a floating platform base body, a diversion device and a mooring system; the flow guide devices are symmetrically arranged and are in an annular array and fixedly connected with the lower part of the floating platform substrate; the cross section of the flow guide device is streamline, and the longest axis formed by any two points on the periphery of the same cross section is positioned in the radial direction of the annular array; the mooring system comprises an adjusting system and a mooring anchor rope; the adjusting system is fixedly connected with the floating platform substrate and is connected with the mooring anchor rope in a sliding mode. The diversion type offshore wind power generation platform provided by the invention can rotate according to the wave direction, ensures that waves flow in the forward direction, and has the advantages of small water power response, strong stability and small mooring system load due to the fact that water flows in a complex way.
Description
Technical Field
The invention belongs to the technical field of offshore wind power, and particularly relates to a diversion type offshore wind power generation platform and an offshore wind power generation system.
Background
Offshore wind energy receives extensive attention in the renewable energy field due to the advantages of large available sea area, high wind speed, small turbulence, close to energy consumption centers and the like. However, as the water depth increases, the construction cost of the fixed infrastructure will increase substantially, and when the water depth exceeds 50m, it is difficult to balance the electricity costs in the prior art. The floating foundation has the advantages of controllable cost, easiness in transportation and the like, is suitable for the development trend of deep and far sea, and the floating offshore wind power is developed to become a key growth point for the development of the wind power industry.
Compared with a fixed wind turbine, the floating wind turbine has the advantages that the lower platform can move freely in a certain range, the operation environment is harsher, and the load bearing characteristics are more complex. Because the operating environment and the structural characteristics are different, the floating wind turbine has the following characteristics compared with the traditional fixed wind turbine: 1) More extreme external environments, 2) hydrodynamic loads such as waves borne by mooring subsystems and the like; 3) The more complex structures of vibration characteristics are fully coupled and non-linear in response. The dynamic stability of a floating wind turbine under the action of wind-wave-flow multi-field loads, in particular the dynamic stability of a floating platform under the influence of external loads, structural coupling power and the like, is one of the focus problems concerned in the current research field. Therefore, the wave resistance of the floating platform is improved, the working performance and the structural safety of the floating wind turbine under the action of complex wind-wave-flow are further improved, and the method is one of key technical problems which are not solved by researchers in the field of wind energy at present.
The power performance of the offshore floating wind turbine needs to be improved by comprehensively considering the integral influence of external factors such as wind shear, waves, ocean current and the like on a structural system, and the directions of incoming wind and incoming water cannot be kept consistent. The motion of each type of floating wind turbine platform is greatly influenced by the change of the wave incident angle, the hydrodynamic performance of the platform is optimal under the condition of the wave incident angle of 0 degrees, and the amplitude of a response amplitude operator can be increased by nearly one hundred times along with the increase of the wave incident angle. Therefore, the floating wind turbine needs to ensure that waves flow in the positive direction, and excessive lateral wave force is avoided. However, a floating wind turbine platform technical scheme capable of maintaining the wave incidence angle at about 0 degree does not exist at present, and a novel floating platform self-adaptive load reduction technology needs to be developed in the field of floating offshore wind power.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a diversion type offshore wind power generation platform which can rotate according to the wave direction, ensures that waves flow in forward direction, and has the advantages of small dynamic response of water in a complex incoming flow, strong stability and small load of a mooring system.
The invention also aims to provide an offshore wind power generation system, and the diversion type offshore wind power generation platform has the advantages of small dynamic response of complex inflow and outflow water, strong stability and small load of a mooring system.
In order to solve the defects of the prior art, the technical scheme provided by the invention is as follows:
a diversion type offshore wind power generation platform comprises a floating platform base body, a diversion device and a mooring system;
the plurality of flow guide devices are symmetrically arranged and are in an annular array and fixedly connected with the lower part of the floating platform substrate; the cross section of the flow guide device is streamline, and the longest axis formed by any two points on the periphery of the same cross section is positioned in the radial direction of the annular array;
the mooring system comprises an adjusting system and a mooring anchor rope; the adjusting system is fixedly connected with the floating platform substrate or the flow guide device and is in sliding connection with the mooring anchor cable.
Preferably, the number of the flow guide devices is three.
Preferably, the cross section of the flow guide device is an axisymmetric figure, and the symmetry axis is the longest axis.
Preferably, the cross section of the flow guide device is in a wing shape, a spinning cone shape, an oval shape or a single-oval double-parabolic streamline shape.
Preferably, the floating platform substrate comprises a central upright post, three water pressing cylinders, three side posts, a plurality of inclined struts and a plurality of cross struts; the central upright post is fixedly connected with the three side posts through the inclined struts and the cross struts; the side columns are fixedly connected with each other through cross braces; the water pressing cylinder is positioned below the side column and is fixedly connected with the side column; the water pressing barrel is fixedly connected with the water pressing barrel through a cross brace.
Preferably, the upper end surface of the flow guide device is fixedly connected with the lower end surface of the water pressing cylinder.
Preferably, the adjusting system comprises a circular guide rail and a sliding device; the circular guide rail is fixedly connected with the floating platform substrate through a guide rail support rod; the sliding device is arc-shaped and is connected with the circular guide rail in a sliding manner; one end of the mooring anchor cable is fixedly connected with the sliding device, and the other end of the mooring anchor cable is fixedly connected with the seabed.
Preferably, a sliding block baffle used for limiting the sliding device is further arranged at the joint of the guide rail support rod and the circular guide rail; the number of the guide rail support rods, the sliding devices and the mooring anchor cables is the same, the guide rail support rods are uniformly arranged, and the guide rail support rods and the sliding devices are arranged at intervals.
Preferably, the number of the guide rail support rods, the number of the sliding devices and the number of the mooring anchor cables are 3, and the included angle between each guide rail support rod and each guide rail support rod is 120 degrees.
An offshore wind power generation system comprises the diversion type offshore wind power generation platform.
The invention has the beneficial effects that:
the annular array flow guide devices provided by the invention can drive the floating platform substrate to rotate when the flow direction changes, the position of the wind turbine engine room is automatically adjusted according to the wind direction, the generation of overlarge lateral wave force is avoided, the wave incident angle is maintained at about 0 degree, the hydrodynamic force response and the vibration amplitude of the floating platform substrate are effectively reduced, the self-adaptive load reduction is realized, the stability of the floating platform substrate is improved, the load of a mooring anchor cable is reduced, the performance requirement on a mooring system is reduced, and the cost is reduced.
The invention has the advantages of simple structure, convenient construction and the like, does not need to design a new floating platform, does not need to improve the existing floating platform, can greatly improve the hydrodynamic performance of the floating wind turbine platform by only adding the guide device and the adjusting system, has low cost and is convenient to popularize and use.
According to the mooring system provided by the invention, when the water level is suddenly and unevenly lowered, the upper end node of the mooring anchor rope is positioned at a similar horizontal height as much as possible in a moving mode of the sliding device, so that the load of the mooring anchor rope is reduced, the floating platform base body is prevented from being turned over, the performance requirement on the mooring system is lowered, and the stability of the platform is improved. The sliding device is far away from the anchor cable, and the sliding block retaining pieces are arranged, so that the anchor cable cannot be wound.
Drawings
FIG. 1 is a schematic structural view of a current-steering offshore wind power generation platform provided by the present invention;
FIG. 2 is a front view of a current-guiding offshore wind power generation platform provided by the present invention;
FIG. 3 is a bottom view of a current-guiding offshore wind power generation platform provided by the present invention;
FIG. 4 is a schematic view of a mooring system provided by the present invention;
FIG. 5 is a comparison graph of the oscillation response amplitude operator of the OC4-DeepCwind semi-submersible at a wave incidence angle of 90 ° in the first embodiment;
FIG. 6 is a comparison graph of the roll response amplitude operator of the OC4-DeepCwind semi-submersible platform at a wave incidence angle of 90 degrees in the first embodiment;
the method comprises the following steps of (1) 2-a flow guide device, 3-a circular guide rail, 4-a guide rail support rod, 5-a sliding device, 6-a mooring anchor rope, 7-a side column, 8-a central upright column, 9-a cross brace, 10-an inclined brace and 12-a water pressing cylinder.
Detailed Description
The present invention will be further described with reference to the following embodiments. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention, and the protection scope of the present invention is not limited thereby.
The embodiment of the invention provides a diversion type offshore wind power generation platform, which is shown in figure 1 and comprises a floating platform base body, a diversion device 2 and a mooring system; the flow guide devices 2 are symmetrically arranged and are in an annular array and fixedly connected with the lower part of the floating platform substrate; the cross section of the flow guide device 2 is streamline, and the longest axis formed by any two points on the periphery of the same cross section is positioned in the radial direction of the annular array; the mooring system comprises an adjustment system and mooring anchor lines 6; the adjusting system is fixedly connected with the floating platform base body or the flow guiding device 2 and is connected with the mooring anchor cable 6 in a sliding way.
When in use, the diversion device 2 is submerged in seawater. When an attack angle exists between the floating platform substrate and the flowing direction of the ocean current, under the impact of the ocean current, the load borne by the guide device which is in an annular array and has a streamline cross section drives the floating platform substrate to rotate and automatically yaw, and the position of the wind turbine engine room is automatically adjusted according to the wind direction, so that waves flow in the positive direction, excessive lateral wave force is avoided, the hydrodynamic response of the floating platform substrate is effectively reduced, and the stability of the floating platform substrate is improved. The floating platform substrate can directly adopt the existing floating platform, such as OC4-DeepCwind semi-submersible platform.
The wind turbine engine room is supported by a tower cylinder, the tower cylinder is connected with the central upright post, and the tower cylinder and the central upright post can be fixedly connected or can be connected in a sliding manner.
In addition, the mooring anchor cable is one of the special key part systems of the floating wind turbine and plays an important role in controlling the floating wind turbine in a certain physical space. The internal force load of the floating platform under the complex wind-wave-flow coupling action needs to be transferred and dissipated through the mooring anchor rope, the traditional floating platform has high requirements on the performance of the mooring anchor rope, and the index has adverse effect on the electricity consumption cost of the floating wind turbine. In the application, when the floating platform substrate rotates, the mooring anchor cables connected with the floating platform substrate in a sliding mode can be kept in place as far as possible through sliding, the load of the mooring anchor cables is reduced, and the performance requirement on a mooring system is lowered.
The invention has the advantages of simple structure, convenient construction and the like, does not need to design a new floating platform, does not need to improve the existing floating platform, and can greatly improve the hydrodynamic performance of the floating wind turbine platform by only adding the flow guide device and the adjusting system.
In an alternative embodiment of the present invention, referring to fig. 1 and 3, three diversion devices 2 are arranged and arranged in a regular triangle. In other embodiments of the invention, the number of the flow guiding devices can be other, so that the flow guiding devices have the same height and are centrosymmetric, and are submerged in seawater, and when an attack angle exists between the floating platform substrate and the flow direction of the ocean current, the floating platform substrate can be driven to rotate.
In an alternative embodiment of the invention, the cross-section of the flow guiding device is an axisymmetric pattern, the axis of symmetry being the longest axis.
In an optional embodiment of the invention, the cross section of the flow guide device can be in a streamline shape such as an airfoil shape, a spinning cone shape, an oval shape or a single-ellipse double-throw streamline shape, and can also be in a streamline shape such as an airfoil shape, a spinning cone shape, an oval shape or a single-ellipse double-throw streamline shape which is cut and spliced and then recombined. In the case of an ellipse, the major axis is in the radial direction of the annular array. When the single-ellipse double-throw streamline is adopted, the ellipse end is positioned at the outer side.
The cross sections of the flow guide devices with different heights are not strictly limited, the cross section of a single flow guide device can be in the same shape and size from top to bottom, and can also be in the same shape or size from top to bottom, and the flow guide devices are only in the same shape and size.
In an alternative embodiment of the present invention, referring to fig. 1-3, the floating platform substrate is a semi-submersible triangular structure comprising a central column 8, three water pressing cylinders 12, three side columns 7, a plurality of diagonal braces 10 and a plurality of cross braces 9; the central upright post 8 is fixedly connected with the three side posts 7 through inclined struts 10 and cross struts 9; the side columns 7 are fixedly connected with the side columns 7 through cross braces 9; the water pressing cylinder 12 is positioned below the side column 7 and fixedly connected with the side column 7; the water pressing barrel 12 is fixedly connected with the water pressing barrel 12 through a cross brace 9.
In an alternative embodiment of the invention, see fig. 1, 2 and 4, the adjustment system comprises a circular guide rail 3 and a displacement device 5; the circular guide rail 3 is positioned below the water pressing cylinder 12 and is fixedly connected with the lower end of the central upright post 8 through a guide rail support rod 4; the sliding device 5 is arc-shaped and is connected with the circular guide rail 3 in a sliding way; one end of the mooring anchor cable 6 is fixedly connected with the sliding device 5, and the other end is fixedly connected with the seabed. A sliding block baffle used for limiting the sliding device 5 is also arranged at the joint of the guide rail support rod 4 and the circular guide rail 3; the number of the guide rail support rods 4, the number of the sliding devices 5 and the number of the mooring anchor cables 6 are the same, the guide rail support rods 4 are uniformly arranged, and the guide rail support rods 4 and the sliding devices 5 are arranged at intervals. When the water level suddenly drops unevenly, the circular guide rail of the mooring system forms a certain included angle with the horizontal plane along with the floating platform substrate, at the moment, the sliding device on the higher side of the circular guide rail can slide on the circular guide rail due to the downward pulling force from the mooring anchor rope, the upper end node of the mooring anchor rope is positioned at a close horizontal height as much as possible in a moving mode through the sliding device, the load of the mooring anchor rope is further reduced, the floating platform substrate is prevented from turning over, the performance requirement on the mooring system is reduced, and meanwhile, the platform stability is also improved. The sliding device is far away from the anchor cable, and the sliding block retaining pieces are arranged, so that the anchor cable cannot be wound. The invention does not limit the form of the joint of the circular guide rail and the sliding device, and the sliding device can slide along the circular guide rail relatively under complex load without separating from the circular guide rail, and the existing slide rail can meet the requirement.
In other embodiments of the invention, the circular guide rail may be fixed at other positions of the central column or connected with other parts of the floating platform substrate, or connected with the flow guide device, so that the circular guide rail is firmly fixed with the floating platform substrate, and the sliding device can slide on the circular guide rail to keep the mooring anchor lines in place as much as possible, thereby reducing the load of the mooring anchor lines.
In an alternative embodiment of the invention, the guide rail supporting rod and the guide rail supporting rod are also provided with reinforcing ribs for enhancing the connection strength.
In an alternative embodiment of the present invention, referring to fig. 4, 3 guide rail support rods 4, 3 glide means 5 and 3 mooring hawsers 6 are provided, and the angle between the guide rail support rods 4 and the guide rail support rods 4 is 120 °. In other embodiments of the present invention, the number of the rail support rods, the number of the sliding devices, and the number of the mooring anchor cables may be other, for example, the number of the rail support rods is 3, the number of the sliding devices and the number of the mooring anchor cables is 6, and two sliding devices are disposed between every two rail support rods.
In alternative embodiments of the invention, the mooring of the mooring lines 6 is catenary or taut.
In an alternative embodiment of the invention the mooring hawsers 6 are catenary wires made of synthetic fibres.
In an alternative embodiment of the present invention, referring to fig. 1 to 3, the upper end surface of the diversion device 2 is fixedly connected with the lower end surface of the water pressing cylinder 10. In other embodiments of the present invention, the deflector may be fixed to the circular guide rail first, and fixed to the floating platform base body through the circular guide rail. In view of the fact that the fastening of the flow guide device to the circular guide rail increases the strength requirements for the circular guide rail, it is preferred that the flow guide device is connected to the pressure cylinder.
In order to prolong the service life of the diversion type offshore wind power generation platform, heavy anti-corrosion coatings are coated on the surfaces of a central upright post, three water pressing cylinders, side posts, inclined struts, cross struts, diversion devices, guide rail supporting rods, circular guide rails, sliding devices, mooring anchor cables and the like.
The embodiment of the invention also provides an offshore wind power generation system which comprises the diversion type offshore wind power generation platform.
Example one
A diversion offshore wind power generation platform, see fig. 1-4, comprises a floating platform base, a diversion device 2 and a mooring system.
The floating platform base body is of a semi-submersible triangular structure, has the same shape and parameters with an OC4-DeepCwind semi-submersible platform, and comprises a central upright post 8, three water pressing cylinders 12, three side posts 7, three inclined struts 10 and 9 cross struts 9; the central upright post 8 is fixedly connected with the three side posts 7 through inclined struts 10 and cross struts 9; the side columns 7 are fixedly connected with the side columns 7 through cross braces 9; the water pressing cylinder 12 is positioned below the side column 7 and fixedly connected with the side column 7; the water pressing barrel 12 is fixedly connected with the water pressing barrel 12 through a cross brace 9. The diameter of the side column is 12m, the draft is 20m, the diameter of the central upright column is 6.5m, the diameter of the water pressing cylinder is 24m, the height of the water pressing cylinder is 6m, the diameters of the cross brace and the inclined brace are 1.6m, and the distance between the side columns is 50m.
The three flow guide devices 2 are arranged in an annular array and are arranged in a regular triangle. The cross section of the flow guide device 2 is in a spinning cone shape, and the long axis is positioned in the radial direction of the annular array. The upper end surface of the flow guide device 2 is fixedly connected with the lower end surface of the water pressing cylinder 10. The periphery of the cross section of the flow guide device is formed by splicing two arcs which are cut from an ellipse with the length of a long shaft of 12.5m and the length of a short shaft of 7.5m, a line segment which takes the middle point of the two arcs as an end point is the short shaft of the ellipse, and the finally spliced cross section is 12m in length and 5.5m in width. The height of the diversion device is 18m, and the draught depth is 30m. The flow guiding devices are arranged in a triangular array mode.
The mooring system comprises mooring anchor cables 6, a circular guide rail 3 and a sliding device 5; the circular guide rail 3 is positioned below the water pressing cylinder 12 and is fixedly connected with the central upright post 8 through a guide rail support rod 4, and the diameter of the circular guide rail is 56 meters; the sliding device 5 is arc-shaped and is in sliding connection with the circular guide rail 3, and the upper end of the sliding device 5 is close to the lower end face of the water pressing barrel 6 but is not in contact with the lower end face of the water pressing barrel 6; one end of the mooring anchor cable 6 is fixedly connected with the sliding device 5, and the other end is fixedly connected with the seabed. A sliding block baffle used for limiting the sliding device 5 is arranged at the joint of the guide rail support rod 4 and the circular guide rail 3; all be equipped with 3 of guide rail bracing piece 4, displacement device 5 and mooring anchor rope 6, guide rail bracing piece 4 align to grid, guide rail bracing piece 4 and displacement device 5 interval set up. The included angle between the guide rail supporting rod 4 and the guide rail supporting rod 4 is 120 degrees, and the diameter of the guide rail supporting rod is 1.5m.
A5 MW horizontal-axis wind turbine engine room with an automatic deviation system is selected and fixed on the central upright post through a tower barrel.
The hydrodynamic performance of the diversion type offshore wind power generation platform of the first embodiment is researched by establishing a hydrodynamic model based on a Morison equation and a potential flow theory and a dynamic mooring model based on a concentrated mass method through AQWA, and the detailed details refer to the literature: chuan Xin, zhanghong Jiang, wanghao, xiahao, wangliang, wanglian, a novel offshore wind turbine floating platform hydrodynamic performance research facing deep and far sea [ J/OL ], reported in China electro-mechanical engineering.
The parameters of the diversion-type offshore wind power generation platform of the first embodiment involved in the simulation calculation are shown in table 1.
Table 1 floating platform parameters for embodiments of the invention
Other parameters such as wind turbine parameters and environmental condition characteristic parameters involved in calculation are the same as those in the above documents, and detailed description thereof is omitted.
FIGS. 5 and 6 are a comparison graph of the roll response amplitude operator and the roll response amplitude operator of the OC4-DeepCwind semi-submersible platform at a wave incident angle of 90 deg., wherein the above references are cited in the data of the roll response amplitude operator and the roll response amplitude operator of the OC4-DeepCwind semi-submersible platform at a wave incident angle of 90 deg., respectively. It can be obviously seen that compared with the traditional OC4-DeepCwind semi-submersible platform, the diversion offshore wind power generation platform provided by the application can greatly reduce the hydrodynamic response of the floating platform matrix by adding the simple measure of a diversion device and combining a mooring system, thereby realizing self-adaptive load reduction and achieving the technical effect of maintaining the wave incident angle at about 0 degree.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various improvements and modifications without departing from the technical principle of the present invention, and those improvements and modifications should be considered as the protection scope of the present invention.
Claims (10)
1. A diversion type offshore wind power generation platform is characterized by comprising a floating platform base body, a diversion device (2) and a mooring system;
the flow guide devices (2) are symmetrically arranged and are in an annular array and fixedly connected with the lower part of the floating platform substrate; the cross section of the flow guide device (2) is streamline, and the longest axis formed by any two points on the periphery of the same cross section is positioned in the radial direction of the annular array;
the mooring system comprises an adjustment system and mooring anchor lines (6); the adjusting system is fixedly connected with the floating platform base body or the flow guide device (2) and is in sliding connection with the mooring anchor cable (6).
2. Flow-guiding offshore wind power generation platform according to claim 1, characterized in that there are three flow guiding devices (2).
3. Flow-guiding offshore wind power generation platform according to claim 1, characterized in that the cross-section of the flow-guiding device (2) is an axisymmetric figure, the symmetry axis being the longest axis.
4. Flow-guiding offshore wind power generation platform according to claim 1, characterized in that the cross section of the flow-guiding device (2) is airfoil, spinpack, oval or single-oval double-parabolic.
5. Flow-guided offshore wind power generation platform according to claim 1, characterized in that the floating platform base comprises a central column (8), three press cylinders (12), three side columns (7), a plurality of braces (10) and a plurality of crossbrace (9); the central upright post (8) is fixedly connected with the three side posts (7) through the inclined struts (10) and the cross struts (9); the side columns (7) are fixedly connected with the side columns (7) through cross braces (9); the water pressing cylinder (12) is positioned below the side column (7) and is fixedly connected with the side column (7); the water pressing barrel (12) is fixedly connected with the water pressing barrel (12) through a cross brace (9).
6. Flow-guiding offshore wind power generation platform according to claim 5, characterized in that the upper end surface of the flow-guiding device (2) is fixedly connected with the lower end surface of the water pressing cylinder (10).
7. Flow-inducing offshore wind power generation platform according to claim 1, characterized in that said adjustment system comprises circular guides (3) and skidding means (5); the circular guide rail (3) is fixedly connected with the floating platform substrate through a guide rail support rod (4); the sliding device (5) is arc-shaped and is in sliding connection with the circular guide rail (3); one end of the mooring anchor cable (6) is fixedly connected with the sliding device (5), and the other end of the mooring anchor cable is fixedly connected with the seabed.
8. The flow-guiding offshore wind power generation platform according to claim 7, wherein a slider block piece for limiting the sliding device (5) is further arranged at the joint of the guide rail support rod (4) and the circular guide rail (3); the number of the guide rail support rods (4), the sliding devices (5) and the mooring anchor cables (6) is the same, the guide rail support rods (4) are uniformly arranged, and the guide rail support rods (4) and the sliding devices (5) are arranged at intervals.
9. Flow-guiding offshore wind power generation platform according to claim 8, wherein there are 3 rail support bars (4), skid devices (5) and mooring hawsers (6), and the angle between the rail support bars (4) and the rail support bars (4) is 120 °.
10. An offshore wind power generation system comprising a flow-induced offshore wind power generation platform according to any of claims 1 to 9.
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| CN115258071B (en) | 2023-12-19 |
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