CN212243735U - Floating type offshore wind power structure foundation with damping effect - Google Patents
Floating type offshore wind power structure foundation with damping effect Download PDFInfo
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- CN212243735U CN212243735U CN202020331389.9U CN202020331389U CN212243735U CN 212243735 U CN212243735 U CN 212243735U CN 202020331389 U CN202020331389 U CN 202020331389U CN 212243735 U CN212243735 U CN 212243735U
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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
- Y02E10/72—Wind turbines with rotation axis in wind direction
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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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- 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
- Y02E10/728—Onshore wind turbines
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Abstract
The utility model provides a floating offshore wind power structure foundation with damping effect, which comprises a floating foundation, wherein the floating foundation is composed of a coaxial multi-section cylinder steel structure and comprises an upper deck working platform, a central upright post and a lower ballast platform; a fan tower cylinder is arranged in the center of the upper deck working platform, the upper deck working platform is provided with a plurality of damping pools penetrating through the upper deck working platform, and the damping pools are arranged around the middle part where the fan tower cylinder is arranged; the central upright post is divided into a plurality of independent watertight compartments for water injection in the height direction, and the water quantity in each compartment is adjustable. The utility model discloses a structure is compared in that traditional column platform draft is more shallow, can be applicable to shallow water and deep water simultaneously, and conveniently tows a voyage and install, and is convenient for at the stability control of during operation.
Description
Technical Field
The utility model relates to a formula offshore wind power structure basis is floated to multistage cylinder with damping effect is applicable to offshore wind power development field, and the depth of water application scope is wide.
Background
The foundation of the offshore wind power structure can be classified into a fixed foundation and a floating foundation, and most offshore wind power plants built at the present stage adopt a fixed foundation technology. However, with the continuous development of offshore wind power, the development of offshore wind farms is gradually progressing from offshore to deep open sea. When the water depth exceeds a certain depth, the fixed foundation has large steel consumption, high manufacturing cost and difficult installation and construction. Compared with the prior art, the floating structure has the advantages that the steel consumption is small, the manufacturing cost is lower, and better economic benefits can be achieved. In addition, the submarine geological conditions of many offshore wind farms are not ideal, and deep pile foundation depths are often required for the fixed foundations to have reliable stability, and the installation and construction costs at this time increase sharply. In this case, even if the water depth of the water area where the wind farm is located is shallow, the floating foundation will be a more reasonable engineering solution. Therefore, the floating offshore wind power structure foundation which is suitable for deep water and shallow water, has strong wind and wave resistance and is more economical is developed, and great engineering significance is achieved.
The existing floating offshore wind power foundation mainly comprises: semi-submersible, mono-column and tension leg. However, these existing floating foundations present several technical bottlenecks when applied to actual engineering:
1. the semi-submersible foundation has larger waterplane area and good stability, but the foundation is high in construction cost and easy to cause fatigue, so that the maintenance cost is increased.
2. The single-column foundation can enable the integral gravity center to be lower than the floating center by utilizing the ballast at the bottom so as to ensure the stability of the platform. However, the single-column foundation cannot be used in offshore wind power plants with shallow water depth, the large main scale and draught of the single-column foundation bring difficulties for construction and installation, and the heave motion of the single-column foundation is large, so that the power generation efficiency is influenced.
3. The tension leg type foundation is a compliance type foundation, the tension ribs enable the motion performance of the platform in the heave direction to be good, however, the tension leg type foundation cannot adapt to the offshore tide level change in China, is very sensitive to the high-frequency load of the environment, is easy to generate the ringing phenomenon, and is easy to fatigue and high in cost.
In summary, the typical floating foundation in the engineering of today has more or less some disadvantages in practical application, and cannot provide a reasonable engineering solution for both shallow water and deep water. Based on this, it is urgently needed to provide a reasonable and effective basic form of a floating wind power structure, so that the floating wind power structure can provide excellent stability for an upper wind power generation unit during power generation under both shallow water and deep water conditions, and has better economical efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a float formula offshore wind power structure basis with damping effect to the problem that floats formula offshore wind power basis exists. Therefore, the utility model adopts the following scheme:
the utility model provides a float formula offshore wind power structure basis with damping effect, includes floating basis, its characterized in that: the floating foundation is composed of a coaxial multi-section type cylinder steel structure and comprises an upper deck working platform, a central upright post and a lower ballast platform;
a fan tower cylinder is arranged in the center of the upper deck working platform, the upper deck working platform is provided with a plurality of damping pools penetrating through the upper deck working platform, and the damping pools are arranged around the middle part where the fan tower cylinder is arranged;
the central upright post is divided into a plurality of independent watertight compartments for water injection in the height direction, and the water quantity in each compartment is adjustable.
The utility model discloses a structure is compared in that traditional column platform draft is more shallow, can be applicable to shallow water and deep water simultaneously, and conveniently tows a voyage and install, and be convenient for at the stability control of during operation.
The upper deck working platform, the central upright post and the lower ballast platform are all steel structures with cylindrical shapes and are multi-section cylindrical foundations. The specific dimensions of the upper deck working platform, the central upright and the lower ballast platform can all be specifically designed according to the actual engineering requirements. The radius of the cylinder at the uppermost section of the position of the waterplane is large, so that the radius of the enough waterplane is ensured, the floating foundation is ensured to have a large inertia moment, further, enough rotational inertia is provided for the whole floating type wind turbine generator, the motion response of rolling and pitching is ensured to be small, and the efficient power generation of the wind turbine generator at the upper part is ensured. The circular table top in the middle of the cylinder at the uppermost section is used for installing a tower structure of a fan at the upper part, and a plurality of fan-shaped damping pools are arranged on the platform around the tower structure. The damping pools penetrate through the uppermost cylindrical platform and are connected with the middle cylinder.
The smallest cylindrical radius of the central column serves on the one hand for the connection and, if necessary, as a reserve ballast tank for adjusting the structure draught. The middle cylinder is divided into a plurality of independent watertight compartments (for example, 3 compartments) capable of adjusting water quantity in parallel in the height direction. Each compartment can be filled with ballast water independently, so that the draught of the structure and the position of the center of gravity can be effectively and flexibly controlled. If necessary, the partial watertight compartment of the mid-section column may be filled with ballast.
The lowest column diameter is larger than the middle column diameter and is where the primary ballast tanks are located. The ballast at the position is adjusted by filling iron ore and concrete so as to achieve the purpose of reducing the gravity center of the floating wind turbine generator, thereby obtaining larger center-stabilizing height and ensuring that the structure has excellent hydrodynamic performance and wind and wave resistance. A preferred embodiment is one in which the diameter of the lowermost cylinder is smaller than the diameter of the uppermost cylinder. On the premise of ensuring the structural stability and safety (the height of the gravity center is lower than that of the floating center), the design reduces the structural material. In fact, for practical applications, the diameter of the lowest-stage cylinder may be greater than or equal to the diameter of the highest-stage cylinder, and such a design will certainly achieve a lower center of gravity of the structure, so that the structure has a greater stability height. In addition, the larger diameter of the lower platform also results in a structure with better structural stability and mooring moment arms (mooring cable holes on the lower ballast platform).
The utility model provides a syllogic's cylinder structure has the characteristic of "big centre in two" little, and at the in-process that the structure was pendulous, this structural feature is similar to the damping plate, can provide a large amount of extra damping of pendulous, can effectively reduce the structure and pendulous and swing ascending motion response, has solved the problem that the direction of pendulous motion response is big that traditional column Spar platform exists, provides more stable operational environment for the electricity generation of upper portion fan unit. If necessary, an annular damping plate may also be provided outside these cylindrical structures. Moreover, the cylindrical structure has larger water plane radius, can provide sufficient restoring force for the structure, and meets the operation requirement of the offshore wind turbine generator with high power in open sea. Moreover, the cylinder structure is completely symmetrical, excellent hydrodynamic performance is realized aiming at different wind directions and wave directions, extra ballast adjustment is not needed, and the design difficulty of a control system in actual engineering is further reduced; meanwhile, the wind turbine generator set can adjust the yaw angle to capture the wind direction conveniently, and the power generation efficiency is improved.
The damping pool is fan-shaped. The size, the arrangement number and the arrangement position of the fan-shaped damping pool can be specifically designed according to the actual engineering requirements. The damping pool can effectively reduce the amplitude of floating motion in a plane, and provides a stable working environment for the upper fan unit. The fan ring design makes the damping pool have good adaptability to waves with different wavelengths, and can provide motion damping under different wave conditions. The design of the damping pool saves steel and improves the economy of the floating foundation.
The utility model discloses a mooring system can choose catenary type mooring or tensioning type mooring according to actual work condition. The mooring cable hole is arranged on the outer side of the lowest section cylindrical platform, the position of a mooring point is reduced, a large mooring restoring force arm is obtained, and the mooring cable is enabled to avoid large wave load at the waterplane.
The floating foundation of the utility model can be simultaneously suitable for the working environment of shallow water and deep water by adjusting the diameter and the height of the upper deck working platform, the central upright post and the lower ballast platform; aiming at a shallow water work sea area, the radius of an upper deck work platform is increased in the design so as to obtain a larger waterplane radius and ensure that the floating foundation has a larger stable center height; aiming at a deepwater working sea area, the radius of an upper deck working platform is reduced to reduce the wave load suffered by a floating foundation, the heights of the upper deck working platform, a central upright post and a lower ballast platform are increased, the draught is increased, the center of gravity is lowered, and the larger center-stabilizing height is obtained.
Furthermore, the central upright post is divided into a plurality of independent watertight sub-chambers for water injection in the height direction, and the watertight sub-chambers are independently filled with water and drained with water, and at least part of the watertight sub-chambers are not filled with water.
The utility model discloses in, lower part ballast platform is used for filling fixed ballast and adjusts floating basis and reach the design draft. The watertight subdivision of center pillar can independently pour ballast water and adjust structure draft, in actual work, can adjust the ballast condition of center pillar according to the feedback of the motion sensor who installs in the wind-powered electricity generation cabin, makes upper portion wind turbine generator system obtain stable operational environment.
To sum up, the utility model discloses the problem that above technical scheme relates to the solution includes:
1) increasing the motion damping of the floating foundation and reducing the motion response under the action of wind waves, thereby improving the wind wave resistance of the floating foundation and providing a stable working environment for the upper fan.
2) The floating foundation has the advantages that the floating foundation is reduced in draught, the limitation that the traditional structure is limited by the water depth in the application process is avoided, and the floating foundation can be simultaneously suitable for shallow water and deep water.
3) The semi-submersible type water surface has larger water surface radius, has smaller steel consumption compared with the traditional semi-submersible type base, and has better stability and economy.
4) No extra regulation of ballast in the cabin is needed for wave direction and wind direction, and the actual production is facilitated.
5) And the stability and the power generation efficiency of the foundation can be ensured for variable wind and wave directions.
Drawings
Fig. 1 is a front view of an embodiment of the present invention;
fig. 2 is a side view of an embodiment of the present invention;
fig. 3 is a top view of an embodiment of the present invention;
fig. 4 is a schematic perspective view of an embodiment of the present invention;
fig. 5 is a schematic view of a ballast water tank system arrangement according to an embodiment of the present invention.
Detailed Description
The following is a detailed description of a preferred embodiment of the present invention.
As shown in fig. 1-4, a floating foundation of a novel multi-section cylindrical offshore wind turbine with damping effect mainly comprises: the mooring structure comprises a multi-section type cylinder foundation, a plurality of fan-shaped annular damping pools and a mooring system, and specifically comprises a wind turbine generator (a fan cabin 1 and fan blades 2), a fan tower 3, an upper deck working platform 4, a central upright post 5, a lower ballast platform 6, an anchoring device 7 and a plurality of fan-shaped annular damping pools 8 from top to bottom.
As shown in fig. 1, the floating foundation is composed of an upper deck working platform 4, a central column 5, and a lower ballast platform 6, and the water line level is in the middle of the upper deck working platform 4. The floating foundation is a steel structure with cylindrical outer profiles of a plurality of sections, wherein the upper platform 4 is the largest, the lower platform 6 is smaller than the upper platform 4 in diameter, the central upright post 5 is the smallest in diameter, and the sections are connected in a welding mode.
As shown in fig. 1 to 4, a fan nacelle 1 is mounted on the upper end of a fan tower 3, and a fan blade 2 is mounted on the fan nacelle 1. The lower end of the fan tower drum 3 is fixed at the center of an upper deck working platform 4 of the floating foundation.
A plurality of fan ring shape damping ponds 8 evenly arrange around fan tower section of thick bamboo 3, and fan ring shape damping pond 8 runs through upper portion deck work platform 4. In practical application, the number and the size of the fan-shaped annular damping pool 8 can be specifically designed according to practical engineering requirements. In one embodiment, as shown in fig. 1-3, three fan-ring damping cells 8 with a central angle of 90 degrees are equally spaced around the fan tower 3. The central angle of the space between the three fan-shaped damping pools 8 is 30 degrees. As shown in fig. 1-4, the inner annular walls of the three fan-shaped damping pools 8 are connected with the central upright post 5.
As shown in fig. 1-4, mooring devices 7 are connected to a lower ballast platform 6 of the floating foundation, mooring the floating foundation to the seabed, each mooring device 7 comprising an anchor machine and an anchor chain, the anchor machine being arranged in the lower ballast platform 6. In one embodiment, as shown in fig. 1-1 and 1-3, a catenary three point mooring is used with a 120 degree angle between mooring points, two steel chains at each mooring point, and a 30 degree angle between the two steel chains.
As shown in fig. 1-5, the lower ballast platform 6 is the first subdivision primarily used for filling the fixed ballast. The central upright post 5 is equally divided into three sub-compartments in the vertical direction, and the number of the three sub-compartments is a second sub-compartment, a third sub-compartment and a fourth sub-compartment. The second, third and fourth chambers are independent and completely watertight, and ballast water can be independently filled. The ballast water of each tank can not be filled, and at the moment, three sub-tanks in the central upright post 5 are all equivalent to anti-rolling water tanks, so that the rolling and pitching response of the floating foundation can be effectively reduced. In one embodiment, sensors may be disposed at the wind turbine nacelle 1 to monitor the motion response of the wind turbine nacelle and transmit the monitored information to the control area of the upper deck working platform 4 in real time, thereby adjusting the ballast water in three compartments of the central column 5 to improve the structural motion state.
The floating foundation is a large-scale steel structure and has symmetry, and in order to accelerate construction progress and reduce overhead operation, the construction of each cylindrical segment can be completed in a dock before production, and then the integral welding and assembly are carried out on land. After the main structure of the floating foundation is completed, the corresponding crawling ladder, anchor machine and other devices are installed. The working platform module can also be built in advance in a factory. The wind turbine generator set and the fan tower cylinder are assembled outside a dock, after the floating foundation is manufactured, the wind turbine generator set (the fan engine room 1 and the blades 2) and the fan tower cylinder 3 are integrally hoisted to the upper portion of the deck working platform, and then the working module is hoisted. After the whole device is built, a dock gate is opened, seawater is put into the dock gate, the floating type fan foundation floats under the action of buoyancy of the floating type fan foundation, 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 waterline should be located at the position of the central upright post 5, and at the moment, the area of the waterline surface is small, the towing resistance is small, and the towing is convenient. After reaching the designated sea area, the ballast tanks in the lower ballast platform 6 and the central column 5 are ballasted, the floating foundation is sunk to the design draft, and the whole installation is moored to the seabed by the anchor chains in the mooring device 7. The installation of the top wind turbine generator and the working platform is completed in a shipyard, so that the problem of offshore installation is avoided, and a large amount of installation cost and offshore construction time are saved.
In the production process, a small part of electric energy generated by the top wind turbine generator is supplied to the working platform 4, the sensor and the like, and main electric energy is transmitted to a coastal city through a submarine cable way booster station and the like through cable pipelines (the working platform 4, the central upright post 5 and the lower ballast platform 6 reserve routing paths and holes during construction) arranged in the fan tower 3, the working platform 4, the central upright post 5 and the lower ballast platform 6. The offshore wind power maintenance ship can regularly maintain the wind turbine generator. The offshore wind power maintenance ship can berth through a berthing component and a mooring bollard arranged near a waterplane, and maintenance workers can climb onto a working platform from the offshore wind power maintenance ship through a crawling ladder to maintain the fan.
The above embodiments are merely preferred technical solutions of the present invention, and it should be understood by those skilled in the art that modifications or substitutions of technical solutions or parameters in the embodiments can be made without departing from the principles and essential conditions of the present invention, and all the modifications or substitutions should be covered within the protection scope of the present invention.
Claims (4)
1. The utility model provides a float formula offshore wind power structure basis with damping effect, includes floating basis, its characterized in that: the floating foundation is composed of a coaxial multi-section type cylinder steel structure and comprises an upper deck working platform (4), a central upright post (5) and a lower ballast platform (6);
a fan tower cylinder (3) is installed in the center of the upper deck working platform (4), a plurality of damping pools (8) penetrating through the upper deck working platform (4) are arranged on the upper deck working platform (4), and the damping pools (8) are arranged around the middle part where the fan tower cylinder (3) is installed;
the central upright post (5) is divided into a plurality of independent watertight compartments for water injection in the height direction, and the water quantity in each compartment is adjustable.
2. A floating offshore wind power structural foundation according to claim 1, characterised in that the upper deck working platform (4), the central upright (5) and the lower ballast platform (6) are all steel structures of cylindrical shape.
3. Floating offshore wind power structure foundation according to claim 1, characterised in that the upper deck working platform (4) has the largest radius, the lower ballast platform (6) is next to the smallest central upright (5) and has the "big end at the middle" feature.
4. Floating offshore wind power structure foundation according to claim 1, characterised in that the damping ponds (8) are fan-shaped.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020331389.9U CN212243735U (en) | 2020-03-17 | 2020-03-17 | Floating type offshore wind power structure foundation with damping effect |
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| CN202020331389.9U CN212243735U (en) | 2020-03-17 | 2020-03-17 | Floating type offshore wind power structure foundation with damping effect |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111469992A (en) * | 2020-03-17 | 2020-07-31 | 中国电建集团华东勘测设计研究院有限公司 | Floating offshore wind power structure foundation with damping effect and stability control method |
| CN112814015A (en) * | 2021-01-12 | 2021-05-18 | 大连理工大学 | Combined structure system of multi-pile foundation and floating type fan and single-ship installation method |
| CN113335468A (en) * | 2021-06-01 | 2021-09-03 | 中国长江三峡集团有限公司 | Offshore wind power and hydrogen production floating foundation structure and balancing method |
| CN116552722A (en) * | 2022-07-28 | 2023-08-08 | 大连理工大学 | Floating system for transporting photovoltaic floating device of offshore floating photovoltaic system |
| CN116950849A (en) * | 2023-08-24 | 2023-10-27 | 上海勘测设计研究院有限公司 | Floating type offshore wind power system and control method |
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2020
- 2020-03-17 CN CN202020331389.9U patent/CN212243735U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111469992A (en) * | 2020-03-17 | 2020-07-31 | 中国电建集团华东勘测设计研究院有限公司 | Floating offshore wind power structure foundation with damping effect and stability control method |
| CN111469992B (en) * | 2020-03-17 | 2022-04-15 | 中国电建集团华东勘测设计研究院有限公司 | Floating offshore wind power structure foundation with damping effect and stability control method |
| CN112814015A (en) * | 2021-01-12 | 2021-05-18 | 大连理工大学 | Combined structure system of multi-pile foundation and floating type fan and single-ship installation method |
| CN112814015B (en) * | 2021-01-12 | 2024-05-28 | 大连理工大学 | Combined structure system of multi-pile foundation and floating fan and single-ship installation method |
| CN113335468A (en) * | 2021-06-01 | 2021-09-03 | 中国长江三峡集团有限公司 | Offshore wind power and hydrogen production floating foundation structure and balancing method |
| CN116552722A (en) * | 2022-07-28 | 2023-08-08 | 大连理工大学 | Floating system for transporting photovoltaic floating device of offshore floating photovoltaic system |
| CN116950849A (en) * | 2023-08-24 | 2023-10-27 | 上海勘测设计研究院有限公司 | Floating type offshore wind power system and control method |
| CN116950849B (en) * | 2023-08-24 | 2024-04-16 | 上海勘测设计研究院有限公司 | Floating type offshore wind power system |
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