CN112455617A - Novel semi-submersible offshore wind power platform - Google Patents
Novel semi-submersible offshore wind power platform Download PDFInfo
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- CN112455617A CN112455617A CN202011397679.4A CN202011397679A CN112455617A CN 112455617 A CN112455617 A CN 112455617A CN 202011397679 A CN202011397679 A CN 202011397679A CN 112455617 A CN112455617 A CN 112455617A
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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
- 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
- B63B2035/442—Spar-type semi-submersible structures, i.e. shaped as single slender, e.g. substantially cylindrical or trussed vertical bodies
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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
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Abstract
The invention discloses a novel semi-submersible offshore wind power platform which comprises four upper buoys, four anti-heaving buoys, twelve connecting buoys, three horizontal buoys, three short connecting buoys, three trusses, a ballast tank, four anti-buckling connecting rods and a mooring device. The semi-submersible wind power platform is built by adopting high-strength aluminum alloy, and the aims of light weight, miniaturization and high corrosion resistance can be achieved. The upper surfaces of the four upper floating cylinders are located above the sea level, and the upper surfaces of the horizontal floating cylinders are located at the sea level, so that the floating center of the wind power system is improved. The damping pool can effectively reduce the motion response of the wind power platform in the horizontal direction. The anti-heaving buoy can effectively reduce the motion response of the wind power platform in the heaving direction. The ballast tank is hinged with the four anti-drooping and swinging buoys by the anti-buckling connecting rods, so that the ballast tank is safe and reliable. The ballast tank is far away from the anti-drooping buoy, so that the gravity center of the wind power platform can be effectively reduced, and the stability of the wind power system is improved.
Description
Technical Field
The invention belongs to the technical field of offshore floating type wind power equipment, and particularly relates to a novel semi-submersible offshore wind power platform.
Background
Ocean is a key field of the strategic emerging industry of China, and with increasing importance placed on the problems of energy safety, climate change and the like of each country, accelerating the development of wind power becomes a common consensus that the international society promotes energy transformation development and deals with climate change. Compared with land and offshore wind power, the wind energy of open sea and deep sea is stronger and more stable, the influence on human and natural environment is smaller, and a larger-scale wind field can be developed, so that the power generation cost can be reduced. In addition, the conventional mooring system of the floating fan suitable for the open sea and the deep sea is suitable for most seabed soil conditions, can be disassembled, and is easy to transport and install. Research shows that when the water depth is more than 50m, the floating type fan has more economic advantages.
The offshore wind power technology is researched and developed earlier in Europe and America and the like, and is currently in the beginning of large-scale application. China is mature in onshore wind turbine technology, but offshore wind turbines start later, and particularly floating wind power technology is rarely researched; offshore wind power is in the key stage of offshore large-scale and deep-sea pilot plant. With the technology maturation and the deepening of the development degree of offshore resources, the floating wind power is the main direction of the development of the offshore wind power.
The semi-submersible wind power platform has wide applicable water depth range and small installation difficulty, can be towed after port assembly, is one of the most potential devices for developing far-sea and deep-sea wind power at present, and has become a hotspot field for offshore wind power research and occupation of offshore resources at home and abroad. However, the semi-submersible wind power platforms developed and put into use at present generally need to be equipped with expensive active ballast systems, and are all made of steel, so that various steel structure platforms developed by various scholars at home and abroad by taking an offshore 5MW wind turbine (with the mass of 697t) released by the American national renewable energy laboratory as an object have the mass of 1804-7150 t, account for about 70% of the weight of the wind power system, and are huge and heavy, and the construction cost is high; and the steel structure platform has poor corrosion resistance, and the cost of anticorrosive coating and later-stage operation and maintenance is high, and the two adverse factors are key technical bottlenecks which hinder the development of open-sea wind power.
Therefore, the research on the semi-submersible offshore wind power platform which is light in weight, small in size, high in corrosion resistance, good in stability and good in motion performance and can effectively resist the action of wind and wave flow in the offshore complex environment has important significance.
Disclosure of Invention
The invention aims to design a novel semi-submersible offshore wind power platform, which can realize light weight, miniaturization, high corrosion resistance, good stability and good movement performance of the platform and can effectively resist the action of wind and wave flow in offshore complex environments.
The technical scheme of the invention is that the novel semi-submersible offshore wind power platform comprises four upper buoys, four anti-heaving buoys, twelve connecting buoys, three horizontal buoys, three short connecting buoys, three trusses, a ballast tank, four anti-buckling connecting rods and a mooring device;
three upper buoys in the four upper buoys form an equilateral triangle, the three upper buoys are respectively positioned at the end points of the equilateral triangle, and the other upper buoy is positioned at the geometric center of the equilateral triangle; the three peripheral upper buoys are connected by horizontal buoys respectively; the central upper buoy is connected with the horizontal buoy through short connecting buoys respectively;
the four anti-heaving buoys are positioned below the four upper buoys, each upper buoy is connected with the anti-heaving buoy through three connecting buoys, and the three connecting buoys are distributed in an equilateral triangle and are arranged on the periphery of the central line which is the central line of the connecting line of the buoys and the anti-heaving buoy; the three peripheral anti-heave buoys are respectively connected with the central anti-heave buoy by a truss;
the ballast tank is positioned below the central anti-heaving buoy, and the ballast tank is hinged with the four anti-heaving buoys through anti-buckling connecting rods;
the mooring devices are respectively arranged on the anti-heaving buoy.
The four upper buoys, the four anti-drooping buoys, the twelve connecting buoys, the three horizontal buoys, the three short connecting buoys, the three trusses, the ballast tank and the four anti-buckling connecting rods are made of high-strength aluminum alloy.
The inner spaces of the four upper buoys, the four anti-drooping buoys, the twelve connecting buoys, the three horizontal buoys, the three short connecting buoys and the ballast tank form independent sealed tanks by using partition plates.
The outer contour of the cross section of the horizontal buoy is pentagonal, and one corner faces the outside of the platform.
The upper surfaces of the central upper buoy and the three peripheral upper buoys are located above the sea level, and the upper surfaces of the horizontal buoys are located at the sea level.
The diameter of the anti-heaving buoy is 1.5-3 times of that of the upper buoy.
The four anti-buckling connecting rods comprise three obliquely connected anti-buckling connecting rods and one vertically connected anti-buckling connecting rod, each anti-buckling connecting rod is composed of a core plate unit and a peripheral constraint unit, the core plate units are in an elastic state during the working of the wind power platform, and the peripheral constraint units are used for inhibiting the integral instability of the core plate units.
The four upper buoys, the four anti-drooping and swinging buoys, the twelve connecting buoys, the three horizontal buoys, the three short connecting buoys, the three trusses, the ballast tank and the four anti-buckling connecting rods are connected through connecting plates and austenitic stainless steel ring groove rivets.
The novel semi-submersible offshore wind power platform provided by the invention has the following advantages:
1. the novel semi-submersible offshore wind power platform is built by adopting high-strength aluminum alloy, and the aims of light weight, miniaturization and high corrosion resistance of the platform can be achieved.
2. The upper surfaces of the four upper floating cylinders are located above the sea level, and the upper surfaces of the horizontal floating cylinders are located at the sea level, so that the floating center of the wind power system is improved.
3. The damping pool formed by enclosing the central upper buoy, the peripheral upper buoys, the horizontal buoys and the short connecting buoys can effectively reduce the motion response of the wind power platform in the horizontal direction.
4. The four anti-heaving buoys can effectively reduce the motion response of the wind power platform in the heaving direction.
5. The ballast tank is connected with the four anti-drooping and swinging buoys in a hinged mode through the anti-buckling connecting rods, safety and reliability are achieved, and the cross section size of the connecting piece can be effectively reduced through the anti-buckling connecting rods.
6. The ballast tank is far away from the anti-drooping buoy, so that the gravity center of the wind power platform can be effectively reduced, and the stability of the wind power system is improved.
Drawings
Fig. 1 is a schematic perspective view of a novel semi-submersible offshore wind power platform according to the present invention.
Fig. 2 is a schematic perspective view of the connection of the upper buoy, the horizontal buoy and the short connecting buoy.
Fig. 3 is a schematic cross-sectional structure diagram of a horizontal pontoon.
Fig. 4 is a schematic perspective view of the anti-buckling connecting rod.
Fig. 5 is a schematic cross-sectional perspective view of a buckling connecting rod.
The reference numbers in the figures illustrate:
1. the device comprises an upper buoy, 2. a vertical swing prevention buoy, 3. a connecting buoy, 4. a horizontal buoy, 5. a short connecting buoy, 6. a truss, 7. a ballast tank, 8. a buckling-restrained connecting rod, 9. a mooring device, 10. a core plate unit, 11. a peripheral restraining unit
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.
Examples
Fig. 1 to 5 show a novel semi-submersible offshore wind power platform according to the present embodiment.
As shown in fig. 1, the novel semi-submersible offshore wind power platform according to the embodiment includes four upper buoys 1, four anti-heaving buoys 2, twelve connecting buoys 3, three horizontal buoys 4, three short connecting buoys 5, three trusses 6, ballast tanks 7, four anti-buckling connecting rods 8, and a mooring device 9;
three upper buoys 1 in the four upper buoys 1 form an equilateral triangle, the three upper buoys 1 are respectively positioned at the end points of the equilateral triangle, and the other upper buoy 1 is positioned at the geometric center of the equilateral triangle; the three peripheral upper buoys 1 are respectively connected by a horizontal buoy 4; the central upper buoy 1 is connected with the horizontal buoy 4 through short connecting buoys 5; the short connecting buoy 5 in this embodiment takes the shape of a rectangular tube.
The four anti-drooping and swinging buoys 2 are positioned below the four upper buoys 1, each upper buoy 1 is connected with the anti-drooping and swinging buoy 2 through three connecting buoys 3, and the three connecting buoys 3 are distributed in an equilateral triangle shape around the central line connecting the centers of the upper buoys 1 and the anti-drooping and swinging buoys 2; the three peripheral anti-heaving buoys 2 are connected with the central anti-heaving buoy 2 through a truss 6;
the ballast tank 7 is positioned below the central anti-heaving buoy 2, and the ballast tank 7 is hinged with the four anti-heaving buoys 2 through anti-buckling connecting rods 8;
the mooring devices 9 are respectively mounted on the anti-heave buoys 2.
The four upper buoys 1, the four anti-drooping and anti-swinging buoys 2, the twelve connecting buoys 3, the three horizontal buoys 4, the three short connecting buoys 5, the three trusses 6, the ballast tank 7 and the four anti-buckling connecting rods 8 are made of high-strength aluminum alloy. Because the density of the high-strength aluminum alloy is only about 1/3 steel, the quality of the semi-submersible wind power platform can be obviously reduced, the processing, the manufacturing and the installation are facilitated, and the construction cost of the semi-submersible wind power platform is reduced; meanwhile, the high-strength aluminum alloy has better corrosion resistance, and the later corrosion resistance operation and maintenance cost can be reduced. The reduction of the comprehensive cost has great significance for realizing the 'flat price surfing' of the offshore wind power.
As shown in fig. 2 and 3, the inner spaces of the four upper buoys 1, the four anti-heave buoys 2, the twelve connecting buoys 3, the three horizontal buoys 4, the three short connecting buoys 5, and the ballast tank 7 form independent sealed tanks with partition plates. The independent sealed cabin is a multi-chamber sealed cabin which is formed by partition plates in radial direction, circumferential direction, transverse direction, horizontal direction and vertical direction. The independent sealed cabin is used for strengthening the local and overall strength of the semi-submersible wind power platform on one hand, and can be used for blocking the influence on the overall buoyancy and stability of the wind power system caused by the penetration of seawater into other sealed cabins on the other hand. Independent sealed cabins in the ballast tank 7 can be filled with sand, concrete, seawater and the like, and are far away from the anti-drooping buoy 2 as far as possible, so that the gravity center of the wind power system is reduced, and the overall stability of the wind power system is improved.
As shown in fig. 3, the horizontal pontoon 4 has a cross-section with an outer contour that is pentagonal, with one corner facing the outside of the platform. The horizontal motion response of the sea wave and ocean current load action on the wind power platform can be reduced.
The upper surfaces of the central upper buoy 1 and the three peripheral upper buoys 1 are located above sea level, and the upper surface of the horizontal buoy 4 is located at sea level. Therefore, the floating center of the wind power system can be improved; and the distance between the central upper floating cylinder 1 and the floating cylinders 1 on the three peripheries is as large as possible on the premise of meeting the structural strength, so that the pitching and rolling motion response of the wind power system is reduced, and the efficient power generation of a wind turbine at the upper end of the tower cylinder is ensured.
The diameter of the anti-heaving buoy 3 is 1.5-3 times of that of the upper buoy 1. The diameter of the anti-heaving buoy 3 in the embodiment is 2 times of the diameter of the upper buoy 1, and the large-diameter anti-heaving buoy 3 can provide a large amount of extra heaving damp, so that the motion response of the wind power platform in the heaving direction can be effectively reduced, and the efficient power generation of the wind power generator set at the upper end of the tower can be ensured.
As shown in fig. 2, three quadrilateral damping pools enclosed by the central upper buoy 1, the peripheral upper buoy 1, the horizontal buoy 4 and the short connecting buoy 5 in the semi-submersible wind power platform can provide a large amount of additional horizontal damping, and effectively reduce the motion response of the wind power platform in the horizontal direction.
As shown in fig. 4 and 5, the buckling-restrained connecting rods 8 include three obliquely-connected buckling-restrained connecting rods 8 and one vertically-connected buckling-restrained connecting rod 8, the buckling-restrained connecting rods 8 are composed of a core plate unit 10 and a peripheral restraining unit 11, the core plate unit 10 is in an elastic state during the operation of the wind power platform, and the peripheral restraining unit 11 is used for restraining the integral instability of the core plate unit 10. The cross-sectional dimension of the buckling-restrained connecting rod 8 can be effectively reduced, and the cost is reduced.
As shown in fig. 1 and 2, except for a mooring device 9, the semi-submersible wind power platform is connected by means of connecting plates and austenitic stainless steel ring groove rivets among four upper buoys 1, four anti-heaving buoys 2, twelve connecting buoys 3, three horizontal buoys 4, three short connecting buoys 5, three trusses 6, ballast tanks 7 and four anti-buckling connecting rods 8.
The connecting plates are flat plates, arc plates, angle plates and the like, are fixedly connected by adopting austenitic stainless steel ring groove rivets, and effectively solve the problem of strength reduction caused by welding connection of high-strength aluminum alloy and the problem of electrochemical corrosion caused by connection of the high-strength aluminum alloy by common bolts.
As shown in fig. 2, fig. 2 shows a schematic partial three-dimensional structure of the connection of the independent sealed cabin of the central upper buoy 1, the horizontal buoy 4 and the short connecting buoy 3 by means of the connecting plate and the austenitic stainless steel ring groove rivet.
The novel semi-submersible offshore wind power platform is of a large-scale high-strength aluminum alloy structure and has symmetry. In order to shorten the construction period and reduce high-altitude operation, before production, the construction of the four upper buoys 1, the four anti-heaving buoys 2, the twelve connecting buoys 3, the three horizontal buoys 4, the three short connecting buoys 5, the three trusses 6, the ballast tank 7, the four anti-buckling connecting rods 8 and other component units can be completed in a dock, and then the rivet connection and assembly of annular grooves among the component units are carried out. After the main structure of the semi-submersible wind power platform is completed, corresponding devices such as a ladder stand, a fence and an anchor machine are installed. The wind turbine generator and the tower cylinder are assembled outside the dock, and after the semi-submersible wind turbine platform is connected and assembled, the wind turbine generator and the tower cylinder are integrally hoisted to the central upper floating cylinder 1 to be connected and fixed. After the whole device is built, a dock gate is opened, seawater is put into the dock gate, the semi-submersible wind power platform floats under the action of self buoyancy, and the whole device is towed out of the dock by a tugboat and towed to a designated sea area. In the towing process, the water line is lower than the lower surface of the upper buoy 1, and at the moment, the water line area is small, the towing resistance is small, and towing is convenient. After the ship arrives at a designated sea area, ballast is poured into the ballast tank 7, the semi-submersible wind power platform sinks to the designed draft, and then the whole device is moored on the seabed by the mooring device 9. As the installation of the upper wind turbine generator and the tower drum is completed in a shipyard, the difficult problem of offshore installation is avoided, and a large amount of installation cost and offshore construction time are saved.
Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The utility model provides a novel semi-submerged formula offshore wind power platform, characterized by: the device comprises four upper buoys, four anti-heaving buoys, twelve connecting buoys, three horizontal buoys, three short connecting buoys, three trusses, a ballast tank, four anti-buckling connecting rods and a mooring device;
three upper buoys in the four upper buoys form an equilateral triangle, the three upper buoys are respectively positioned at the end points of the equilateral triangle, and the other upper buoy is positioned at the geometric center of the equilateral triangle; the three peripheral upper buoys are connected by horizontal buoys respectively; the central upper buoy is connected with the horizontal buoy through short connecting buoys respectively;
the four anti-heaving buoys are positioned below the four upper buoys, each upper buoy is connected with the anti-heaving buoy through three connecting buoys, and the three connecting buoys are distributed in an equilateral triangle and are arranged on the periphery of the central line which is the central line of the connecting line of the buoys and the anti-heaving buoy; the three peripheral anti-heave buoys are respectively connected with the central anti-heave buoy by a truss;
the ballast tank is positioned below the central anti-heaving buoy, and the ballast tank is hinged with the four anti-heaving buoys through anti-buckling connecting rods;
the mooring devices are respectively arranged on the anti-heaving buoy.
2. The novel semi-submersible offshore wind power platform of claim 1, characterized by: the four upper buoys, the four anti-drooping buoys, the twelve connecting buoys, the three horizontal buoys, the three short connecting buoys, the three trusses, the ballast tank and the four anti-buckling connecting rods are made of high-strength aluminum alloy.
3. The novel semi-submersible offshore wind power platform of claim 1, characterized by: the inner spaces of the four upper buoys, the four anti-drooping buoys, the twelve connecting buoys, the three horizontal buoys, the three short connecting buoys and the ballast tank form independent sealed tanks by using partition plates.
4. The novel semi-submersible offshore wind power platform of claim 1, characterized by: the outer contour of the cross section of the horizontal buoy is pentagonal, and one corner faces the outside of the platform.
5. The novel semi-submersible offshore wind power platform of claim 1, characterized by: the upper surfaces of the central upper buoy and the three peripheral upper buoys are located above the sea level, and the upper surfaces of the horizontal buoys are located at the sea level.
6. The novel semi-submersible offshore wind power platform of claim 1, characterized by: the diameter of the anti-heaving buoy is 1.5-3 times of that of the upper buoy.
7. The novel semi-submersible offshore wind power platform of claim 1, characterized by: the four anti-buckling connecting rods comprise three obliquely connected anti-buckling connecting rods and one vertically connected anti-buckling connecting rod, each anti-buckling connecting rod is composed of a core plate unit and a peripheral constraint unit, the core plate units are in an elastic state during the working of the wind power platform, and the peripheral constraint units are used for inhibiting the integral instability of the core plate units.
8. The novel semi-submersible offshore wind power platform of claim 1, characterized by: the four upper buoys, the four anti-drooping and swinging buoys, the twelve connecting buoys, the three horizontal buoys, the three short connecting buoys, the three trusses, the ballast tank and the four anti-buckling connecting rods are connected through connecting plates and austenitic stainless steel ring groove rivets.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113306671A (en) * | 2021-05-24 | 2021-08-27 | 中国能源建设集团广东省电力设计研究院有限公司 | Floating type offshore wind turbine system |
| CN113428310A (en) * | 2021-08-12 | 2021-09-24 | 大连理工大学 | Floating type fan platform based on suspension type vibration damper |
| CN113619742A (en) * | 2021-08-18 | 2021-11-09 | 北京谱海科技有限公司 | Hybrid floating offshore wind turbine platform and design and construction method of composite material side column thereof |
| CN113772034A (en) * | 2021-09-06 | 2021-12-10 | 上海电气风电集团股份有限公司 | Offshore wind turbine and foundation |
| CN114987708A (en) * | 2022-06-22 | 2022-09-02 | 山东理工大学 | Semi-submersible floating type wind turbine platform with eccentric floating barrels |
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