CN116971936A - Floating energy consumption device for offshore wind turbine support structure and installation method thereof - Google Patents
Floating energy consumption device for offshore wind turbine support structure and installation method thereof Download PDFInfo
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- CN116971936A CN116971936A CN202310900604.0A CN202310900604A CN116971936A CN 116971936 A CN116971936 A CN 116971936A CN 202310900604 A CN202310900604 A CN 202310900604A CN 116971936 A CN116971936 A CN 116971936A
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- 238000005265 energy consumption Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000009434 installation Methods 0.000 title claims abstract description 8
- 238000010276 construction Methods 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 230000009467 reduction Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
- F03D13/25—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/30—Wind motors specially adapted for installation in particular locations
- F03D9/34—Wind motors specially adapted for installation in particular locations on stationary objects or on stationary man-made structures
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a floating energy consumption device for a support structure of an offshore wind turbine and an installation method thereof, wherein the floating energy consumption device comprises a floating body, an elastic connecting piece, a tension cable and a suction type mooring anchor, the top of the floating body is connected with the inner wall of the support structure through the elastic connecting piece, mechanical movement energy of the support structure is transmitted to the floating body through the elastic connecting piece, the bottom of the floating body is connected with the suction type mooring anchor through the tension cable, the suction type mooring anchor is fixed on the mud surface of a seabed and extends downwards, and the tension leg type floating body formed by the floating body and the tension cable bears and dissipates the mechanical movement energy transmitted by the support structure. The invention provides the elastic energy consumption effect of the supporting structure by utilizing the restoring force of the tension leg type floating body moored to the seabed and horizontally and elastically connecting with the supporting structure, thereby reducing the load born by the supporting structure, having low comprehensive cost, economic feasibility and low engineering risk.
Description
Technical Field
The invention relates to the technical field of load reduction of a support structure of an offshore wind turbine, in particular to a floating energy consumption device for the support structure of the offshore wind turbine and an installation method thereof.
Background
Offshore wind power is an important component for the development of clean new energy, and the development of the offshore wind power is more and more important. However, due to the severe natural environment of the sea, the dilemma that the construction cost of the offshore wind power is high is brought, and the industrial goal of low-price surfing of the offshore wind power cannot be realized at present.
For the cost reduction of offshore wind power, various efforts and innovations are necessarily needed in the whole industry, and the cost reduction potential of each component part is deeply excavated. The supporting structure of the single pile fixed type offshore wind turbine accounts for about 23% of the total cost of wind farm development projects, and meanwhile, the investment scale of most of the domestic offshore wind farm development projects often reaches more than billions of RMB and even higher, so that the cost of the supporting structure is reduced, the electricity-measuring cost of offshore wind power development can be obviously reduced, and the aims of low-price surfing are brought together.
Wind turbines capture wind energy, typically about forty to fifty percent of the energy that is converted to electrical energy, and most of the remaining energy is carried by the support structure and ultimately transferred to the seabed, thus the support structure must have greater rigidity and strength, which is one of the essential reasons for the high cost of the support structure. With the gradual development of offshore wind power to deep sea and the large trend of fan design, in order to meet the design requirement, the overall size design of a supporting structure is increased, the design diameter of a pile body under the seabed mud surface is developed from the initial six seven meters to eleven two meters, and the thickness of the wall of the pile body is close to one hundred millimeters; the diameter of the tower drum at the upper part of the supporting structure is generally about seven meters, the thickness of the drum wall is tens of millimeters, and the steel consumption of the whole supporting structure is close to three thousand tons.
The input control conditions of the support structure size design generally comprise fatigue load, limit load and modal frequency lower limit requirements of the structure, wherein the requirements of the modal frequency lower limit are also set for controlling the size of the fatigue load, so that how to reduce the rigidity and strength requirements of the support structure, reduce the load of the support structure, which is the key of reducing the geometric dimension of the support structure and further reducing the steel consumption, and developing an energy consumption device capable of being used for reducing the load of the support structure of the offshore wind turbine generator is one of the directions of cost reduction.
The conventional way to dissipate the energy of the supporting structure is to add a damper at the top of the supporting structure, and the most common damper is in a simple pendulum form, such as a skyscraper on land, and a simple pendulum damper is generally added at the top of the building. However, the offshore wind power supporting structure is generally an elongated structure with a reduced top diameter, the space inside the structure is extremely limited, the space diameter is often between 4 and 5 meters, the movement space of the simple pendulum is greatly limited, the effect is not ideal, and the cost performance and the safety are difficult to achieve. In addition, some new types of dampers, such as an eddy current damper and a bucket damper, are also emerging in recent years, but the effects of the dampers are difficult to be economically achieved through detailed design analysis and cannot be popularized on a large scale.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a floating energy consumption device for a support structure of an offshore wind turbine, which utilizes the unique conditions of sea, sets up the floating energy consumption device in the support structure, forms a tension leg type floating body by a floating body and a tension pull rope, utilizes the restoring force of the tension leg type floating body moored to the sea bed, and provides the elastic energy consumption effect of the support structure through horizontal elastic connection with the support structure, thereby reducing the load born by the support structure, and has low comprehensive cost, economic feasibility and low engineering risk.
Another object of the invention is to provide a method for installing a floating energy consumption device for a support structure of an offshore wind turbine.
The aim of the invention is achieved by the following technical scheme:
a floating energy consumption device for offshore wind turbine generator system bearing structure, floating energy consumption device sets up in bearing structure's inside, including body, elastic connection spare, tension cable and suction mooring anchor, the top of body passes through elastic connection spare and bearing structure's inner wall connection, bearing structure's mechanical motion energy passes through elastic connection spare and transmits to the body, the bottom of body passes through tension cable and suction mooring anchor connection, suction mooring anchor is fixed in the seabed mud face and downwardly extending, and the tension leg formula body that comprises body and tension cable bears and dissipates the mechanical motion energy that bearing structure transmitted.
Further, the body section is tubular structure including from bottom to top in proper order connected main part section, changeover portion and linkage segment, its diameter is determined according to bearing structure's diameter, and its inside is provided with a plurality of hollow cabins, the lower part of main part section is submerged under the sea surface, and its draft can provide sufficient buoyancy and tension cable's pretension, the diameter of linkage segment is less than the diameter of main part section, and its top is connected with bearing structure's inner wall through elastic connection spare.
Further, the floating body is a concrete floating body, a steel floating body or a steel-concrete floating body.
Further, the elastic connecting pieces are springs or hydraulic rods, the number of the elastic connecting pieces is multiple, and the elastic connecting pieces are distributed on the periphery of the floating body in a radial mode.
Further, the elastic connecting piece is horizontally arranged.
Further, the suction mooring anchor is of a cylindrical structure with an opening at the top end and a closed bottom end, and the top end of the suction mooring anchor is provided with an ear plate used for being connected with a tension cable.
Further, the suction mooring anchor is a steel.
Further, the tension cables are provided in plurality and are circumferentially spaced between the suction mooring anchor and the floating body.
Further, the tension cable is any one or a combination of a plurality of anchor chains, fiber cables, mooring chains and steel wire ropes.
The other object of the invention is achieved by the following technical scheme:
the method for installing the floating energy consumption device for the offshore wind turbine support structure comprises the following steps:
s1, hoisting a suction type mooring anchor according to a set offshore construction mode, lowering the suction type mooring anchor to a preset positioning point on the seabed mud surface, and penetrating the suction type mooring anchor to a preset depth below the seabed mud surface in a set negative pressure mode;
s2, towing the floating body into place, and injecting a set amount of ballast water into a hollow cabin of the floating body to enable the floating body to sink to a preset depth;
s3, connecting and installing a tension cable between the floating body and the suction mooring anchor, and connecting the upper part and the lower part of the tension cable through a temporary shackle so as to temporarily fix the floating body;
s4, penetrating the single support structure pile into place according to a set offshore construction piling procedure;
s5, hoisting the wind generating set in place according to a set offshore wind power construction hoisting procedure, and connecting the wind generating set with a supporting structure by adopting bolts;
s6, releasing temporary shackle connection of the tension cable, gradually discharging a set amount of ballast water in a hollow cabin of the floating body, floating the floating body upwards through load adjustment, and finally floating to a draft capable of meeting the requirements of buoyancy and pretension of the tension cable;
s7, measuring the gap between the outer wall of the top of the floating body and the inner wall of the supporting structure, processing an elastic connecting piece according to the size of the gap, and connecting the top of the floating body with the inner wall of the supporting structure through the elastic connecting piece in the supporting structure to finish installation.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. according to the invention, the floating energy consumption device is arranged in the supporting structure by utilizing the unique condition of the ocean, the floating body and the tension pull cable form the tension leg type floating body, and the elastic energy consumption effect of the supporting structure is provided by utilizing the restoring force of the tension leg type floating body moored to the seabed and horizontally and elastically connecting the supporting structure, so that the load born by the supporting structure is reduced, the comprehensive cost is low, the economic feasibility is realized, and the engineering risk is low.
2. The floating body is positioned in the single-pile supporting structure and cannot be influenced by the action of external sea strong stormy waves and the like, so that the floating body does not need to have excessive rigidity, strength and dimensional accuracy, and can adopt low-cost materials and construction modes on the premise that the volume meets the buoyancy.
3. The suction mooring anchor adopted by the invention is a conventional offshore suction foundation, is convenient and quick to install, and does not increase the load bearing burden of the original single pile supporting structure.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the floating energy consumption device of the present invention.
Fig. 2 is a top view of the floating energy consuming device of the present invention.
Fig. 3 is a schematic structural view of the floating body of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by persons of ordinary skill in the art without making any inventive effort based on the embodiments of the present invention are within the scope of protection of the present invention.
Example 1:
as shown in fig. 1 to 3, this embodiment provides a floating energy dissipation device for a support structure of an offshore wind turbine, where the floating energy dissipation device is disposed inside a support structure 2 and includes a floating body 3, an elastic connection piece 4, a tension cable 5 and a suction mooring anchor 6, the top of the floating body 3 is connected with the inner wall of the support structure 2 through the elastic connection piece 4, mechanical motion energy of the support structure 2 is transferred to the floating body 3 through the elastic connection piece 4, the bottom of the floating body 3 is connected with the suction mooring anchor 6 through the tension cable 5, and the suction mooring anchor 6 is fixed on a seabed mud surface and extends downward, and a tension leg type floating body composed of the floating body 3 and the tension cable 5 bears and dissipates the mechanical motion energy transferred by the support structure 2.
Specifically, the floating body 3 may be a concrete floating body 3, a steel floating body 3 or a steel-concrete floating body 3. The floating body 3 comprises a main body section 301, a transition section 302 and a connecting section 303 which are sequentially connected from bottom to top, wherein the main body section is of a cylindrical structure, the diameter of the main body section is determined according to the diameter of the supporting structure 2, a plurality of hollow cabins are arranged in the main body section, the lower part of the main body section is submerged under the sea surface, the underwater part is required to be designed to have enough draft so as to provide enough buoyancy and pretension of the tension cable 5, the connecting section is of an elongated upright rod, the diameter of the connecting section is smaller than that of the main body section, and the top of the connecting section is connected with the inner wall of the supporting structure 2 through an elastic connecting piece 4.
The floating body 3 in this embodiment is located inside the supporting structure 2 and is not affected by the action of external sea strong wind and wave currents, so that the floating body does not need to have excessive rigidity, strength and dimensional accuracy, and can be made of low-cost materials and in a construction mode on the premise that the volume meets the buoyancy.
Specifically, the elastic connecting pieces 4 are springs or hydraulic rods, the number of which is more than 8, preferably more than 8, and are radially distributed on the periphery of the floating body 3, and each elastic connecting piece 4 is horizontally arranged.
Specifically, the suction mooring anchor 6 is a cylindrical structure with an open top and a closed bottom, the top end of the cylindrical structure is provided with an ear plate for being connected with the tension cable 5, the diameter of the cylindrical structure is required to be larger than 6 meters and smaller than the inner diameter of the support structure 2 at the seabed mud surface, and specific values of the cylindrical diameter and the mud entering design depth are designed according to the seabed soil conditions and the tension requirement of the tension cable 5.
Further, the suction mooring anchor 6 is a steel.
Specifically, there are a plurality of tension cables 5, preferably 6 to 8 or more, and the plurality of tension cables 5 are circumferentially arranged between the suction mooring anchor 6 and the floating body 3 at intervals, and the tension cables 5 are required to have sufficient pretension when installed.
Further, the tension cable 5 is any one or a combination of a plurality of anchor chains, fiber cables, mooring chains and steel wire ropes.
The supporting structure of the offshore wind turbine generator is generally an elongated structure with a reduced top diameter, the space inside the structure is extremely limited, the space diameter is often between 4 and 5 meters, if a damper weight is additionally arranged, the movement space of a simple pendulum is greatly limited, and the effect is not ideal. The floating energy consumption device provides a way for dissipating energy through the buoyancy of the sea water and the tension of the tension cable, so that the addition of a damper weight on the top of a supporting structure is avoided, the damper weight is unfavorable for the supporting structure to reduce the load due to the huge weight of the damper weight, and the safety problem exists. In addition, the position of the elastic connecting piece can be set lower according to the requirement, so that the tension leg type floating body has larger movement space and better energy consumption effect.
Example 2:
the embodiment provides a method for installing a floating energy consumption device for a support structure of an offshore wind turbine, which comprises the following steps:
s1, a suction type mooring anchor is a conventional offshore suction type foundation, the suction type mooring anchor is hoisted according to a set offshore construction mode and is lowered to a preset locating point on the seabed mud surface, and the suction type mooring anchor is penetrated to a preset depth below the seabed mud surface in a set negative pressure mode;
s2, towing the floating body into place, and injecting a set amount of ballast water into a hollow cabin of the floating body to enable the floating body to sink to a preset depth, namely, the top position of the floating body is lower than the single pile piling point position of the supporting structure;
s3, connecting and installing a tension cable between the floating body and the suction mooring anchor, and connecting the upper part and the lower part of the tension cable in a temporary shackle mode, namely, only taking a section of temporary fixed floating body with the length of the tension cable;
s4, penetrating the single support structure pile into place according to a set offshore construction piling procedure;
s5, hoisting the wind generating set in place according to a set offshore wind power construction hoisting procedure, and connecting the wind generating set with a supporting structure by adopting bolts;
s6, releasing temporary shackle connection of the tension cable, gradually discharging a set amount of ballast water in a hollow cabin of the floating body, enabling the floating body to float upwards through accurate load adjustment, and finally floating to a draft capable of meeting the requirements of buoyancy and pretension of the tension cable;
s7, accurately measuring the gap between the outer wall of the top of the floating body and the inner wall of the supporting structure in the supporting structure, customizing and accurately processing the elastic connecting piece according to the size of the gap, namely according to the final installation accuracy of the supporting structure, so as to meet the actual use requirement, and connecting the top of the floating body with the inner wall of the supporting structure in the supporting structure through the elastic connecting piece to finish the installation.
The above description is only of the preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the inventive conception of the present invention equally within the scope of the disclosure of the present invention.
Claims (10)
1. A floating power consumption device for marine wind turbine support structure, its characterized in that: the floating energy consumption device is arranged in the supporting structure and comprises a floating body, an elastic connecting piece, a tension pull cable and a suction type mooring anchor, the top of the floating body is connected with the inner wall of the supporting structure through the elastic connecting piece, mechanical movement energy of the supporting structure is transmitted to the floating body through the elastic connecting piece, the bottom of the floating body is connected with the suction type mooring anchor through the tension pull cable, the suction type mooring anchor is fixed on the mud surface of the seabed and extends downwards, and the tension leg type floating body formed by the floating body and the tension pull cable bears and dissipates the mechanical movement energy transmitted by the supporting structure.
2. The floating energy consumption device for an offshore wind turbine support structure of claim 1, wherein: the body section is tubular structure, and its diameter is confirmed according to bearing structure's diameter, and its inside is provided with a plurality of hollow cabins, the lower part of body section is submerged under the sea surface, and its draft can provide sufficient buoyancy and tension cable's pretension, the diameter of connecting section is less than the diameter of body section, and its top is connected with bearing structure's inner wall through elastic connection spare.
3. The floating energy consumption device for an offshore wind turbine support structure of claim 2, wherein: the floating body is a concrete floating body, a steel floating body or a steel-concrete floating body.
4. The floating energy consumption device for an offshore wind turbine support structure of claim 1, wherein: the elastic connecting pieces are springs or hydraulic rods, the number of the elastic connecting pieces is multiple, and the elastic connecting pieces are distributed on the periphery of the floating body in a radial mode.
5. The floating energy consumption device for an offshore wind turbine support structure of claim 4, wherein: the elastic connecting piece is horizontally arranged.
6. The floating energy consumption device for an offshore wind turbine support structure of claim 1, wherein: the suction mooring anchor is of a cylindrical structure with an opening at the top end and a closed bottom end, and an ear plate used for being connected with a tension cable is arranged at the top end of the suction mooring anchor.
7. The floating energy consumption device for an offshore wind turbine support structure of claim 6, wherein: the suction mooring anchor is a steel.
8. The floating energy consumption device for an offshore wind turbine support structure of claim 1, wherein: the tension cables are arranged between the suction mooring anchor and the floating body at intervals along the circumferential direction.
9. The floating energy consumption device for an offshore wind turbine support structure of claim 8, wherein: the tension cable is any one or a combination of a plurality of anchor chains, fiber cables, mooring chains and steel wire ropes.
10. A method of installing a floating energy consuming device for a support structure of an offshore wind turbine according to any one of claims 1 to 9, comprising the steps of:
s1, hoisting a suction type mooring anchor according to a set offshore construction mode, lowering the suction type mooring anchor to a preset positioning point on the seabed mud surface, and penetrating the suction type mooring anchor to a preset depth below the seabed mud surface in a set negative pressure mode;
s2, towing the floating body into place, and injecting a set amount of ballast water into a hollow cabin of the floating body to enable the floating body to sink to a preset depth;
s3, connecting and installing a tension cable between the floating body and the suction mooring anchor, and connecting the upper part and the lower part of the tension cable through a temporary shackle so as to temporarily fix the floating body;
s4, penetrating the single support structure pile into place according to a set offshore construction piling procedure;
s5, hoisting the wind generating set in place according to a set offshore wind power construction hoisting procedure, and connecting the wind generating set with a supporting structure by adopting bolts;
s6, releasing temporary shackle connection of the tension cable, gradually discharging a set amount of ballast water in a hollow cabin of the floating body, floating the floating body upwards through load adjustment, and finally floating to a draft capable of meeting the requirements of buoyancy and pretension of the tension cable;
s7, measuring the gap between the outer wall of the top of the floating body and the inner wall of the supporting structure, processing an elastic connecting piece according to the size of the gap, and connecting the top of the floating body with the inner wall of the supporting structure through the elastic connecting piece in the supporting structure to finish installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310900604.0A CN116971936A (en) | 2023-07-21 | 2023-07-21 | Floating energy consumption device for offshore wind turbine support structure and installation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310900604.0A CN116971936A (en) | 2023-07-21 | 2023-07-21 | Floating energy consumption device for offshore wind turbine support structure and installation method thereof |
Publications (1)
| Publication Number | Publication Date |
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| CN116971936A true CN116971936A (en) | 2023-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310900604.0A Pending CN116971936A (en) | 2023-07-21 | 2023-07-21 | Floating energy consumption device for offshore wind turbine support structure and installation method thereof |
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| Country | Link |
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| CN (1) | CN116971936A (en) |
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2023
- 2023-07-21 CN CN202310900604.0A patent/CN116971936A/en active Pending
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