CN116950849A - Floating type offshore wind power system and control method - Google Patents
Floating type offshore wind power system and control method Download PDFInfo
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- CN116950849A CN116950849A CN202311073364.8A CN202311073364A CN116950849A CN 116950849 A CN116950849 A CN 116950849A CN 202311073364 A CN202311073364 A CN 202311073364A CN 116950849 A CN116950849 A CN 116950849A
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- 238000007667 floating Methods 0.000 title claims abstract description 180
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000013016 damping Methods 0.000 claims abstract description 57
- 238000000926 separation method Methods 0.000 claims abstract description 51
- 239000007788 liquid Substances 0.000 claims abstract description 45
- 230000033001 locomotion Effects 0.000 claims description 26
- 230000002829 reductive effect Effects 0.000 claims description 17
- 230000005611 electricity Effects 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 5
- 238000004873 anchoring Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
- F03B13/14—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
- F03B13/16—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem"
- F03B13/20—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" wherein both members, i.e. wom and rem are movable relative to the sea bed or shore
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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
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
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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
Abstract
The invention discloses a floating type offshore wind power system and a control method, wherein the floating type offshore wind power system comprises a floating type foundation platform formed by a plurality of floating type foundation units, adjacent floating type foundation units are connected through connecting units, and each floating type foundation unit is provided with a wind turbine generator; the connecting unit comprises a cylinder body and a piston rod, one end of the piston rod is fixedly connected with one end of the flexible rod, the other end of the flexible rod is hinged with one floating foundation unit, the cylinder body is hinged with the other floating foundation unit, a piston on the piston rod divides the inner cavity of the cylinder body into two separation cavities, liquid damping media are arranged in the two separation cavities, piston holes are formed in the piston, the separation cavities are connected with a hydraulic motor, and an output shaft of the hydraulic motor is connected with a generator. The invention can improve the bearing capacity of the whole floating foundation platform through the connecting unit, can install a plurality of wind turbines on the floating foundation platform, and has lower construction and transportation installation costs of each floating foundation unit and each wind turbine.
Description
Technical Field
The invention belongs to the technical field of offshore wind power, and particularly relates to a floating offshore wind power system and a control method.
Background
With the gradual development of the offshore wind turbine generator towards large-scale and deep sea areas, the development of the offshore wind turbine generator adopting the traditional fixed foundation faces a major technical bottleneck that the foundation is high in cost and difficult to construct and install, and under the condition, floating wind power is adopted as a main solution. In addition, under the trend of large-scale offshore wind turbine generator systems, if a traditional mode of bearing a single offshore wind turbine generator system by a single foundation is adopted, the large-scale offshore wind turbine generator system can face the problems of large construction difficulty and difficult transportation and installation, wherein the transportation and installation difficulty is mainly represented by the following aspects: the hoisting apparatus of the offshore wind turbine generator exceeds a bearing range, the capacity of a wharf is not large enough, the bearing capacity of the wharf is limited, and the towing ship is overrun; meanwhile, the foundation volume suitable for a single large-scale offshore wind turbine is larger, the steel consumption can be greatly increased, and the problems of high construction and installation difficulty and capability of dragging ships to exceed the bearing range are faced.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention provides a floating offshore wind power system and a control method, in which the bearing capacity of the entire floating foundation platform can be improved by the connection unit, and a plurality of wind turbines can be installed on the floating foundation platform, and the construction and transportation installation costs of each floating foundation unit and each wind turbine are low.
The technical scheme adopted for solving the technical problems is as follows:
the floating offshore wind power system comprises a floating foundation platform, wherein the floating foundation platform comprises a plurality of floating foundation units, adjacent floating foundation units are connected through a connecting unit, and each floating foundation unit is provided with a wind turbine generator; the connecting unit comprises a cylinder body, a piston rod is arranged in the cylinder body, the piston rod extends out from one end of the cylinder body and is fixedly connected with one end of a flexible rod, the other end of the flexible rod is hinged with one floating foundation unit, the other end of the cylinder body is hinged with the other floating foundation unit, a piston is arranged on the piston rod, the inner cavity of the cylinder body is divided into two separation cavities by the piston, liquid damping media are arranged in the two separation cavities, a piston hole for communicating the two separation cavities is formed in the piston, the two separation cavities are also respectively connected with a hydraulic motor, and an output shaft of the hydraulic motor is connected with a generator.
Further, the generator circuit on each connecting unit is connected to a total wind farm circuit formed by connecting the wind turbine generator circuits in series.
Further, the piston rods and the flexible rods of each connecting unit are multiple and equal in number, the multiple piston rods are parallel to each other, the cylinder body comprises an outer cylinder body, a plurality of inner cylinder bodies with the same number as the piston rods are arranged in the outer cylinder body, each inner cylinder body is internally provided with one piston rod in an inserted mode, each piston rod sequentially extends out of the inner cylinder body and the outer cylinder body and is fixedly connected with one end of the corresponding flexible rod, the other end of each flexible rod is hinged to one floating foundation unit, the other end of the outer cylinder body is hinged to the other floating foundation unit, a piston is fixedly sleeved on the piston rod in the inner cylinder body, the inner edge of the piston is in sealing connection with the piston rod, the outer edge of the piston is in sealing contact with the inner wall of the inner cylinder body, the inner cavity of the inner cylinder body is divided into two inner separation cavities, liquid damping media are respectively arranged in the two inner separation cavities, the piston is provided with piston holes for communicating the two inner separation cavities, each inner cylinder body is respectively connected with a hydraulic motor, and the hydraulic motor and the generator is respectively arranged in the inner separation cavities and the outer cylinder body.
Further, the other end of each flexible rod is hinged to a first mounting seat, the first mounting seat is fixed on one floating foundation unit, the other end of the outer cylinder body is hinged to a second mounting seat, and the second mounting seat is fixed on the other floating foundation unit.
Further, the number of the inner cavities of the cylinder body is two, the piston rod is inserted into one of the inner cavities of the cylinder body, the piston divides the one of the inner cavities of the cylinder body into two separation cavities, and the hydraulic motor and the generator are arranged in the other inner cavity of the cylinder body.
Further, the other end of the flexible rod is hinged to a third mounting seat, the third mounting seat is fixed to one floating foundation unit, the other end of the cylinder body is hinged to a fourth mounting seat, and the fourth mounting seat is fixed to the other floating foundation unit.
Further, the floating foundation platform comprises a plurality of rows of parallel floating foundation platform segments, each row of floating foundation platform segments comprises a plurality of floating foundation units, and adjacent floating foundation units in two adjacent rows of floating foundation platform segments are staggered and share mooring points.
Further, the floating foundation unit comprises a deck, three stand columns are fixed on the lower surface of the deck, the three stand columns are evenly distributed on the lower surface of the deck, the stand columns are connected through a cross brace, heave pontoons are fixed at the lower ends of each stand column, and a wind turbine generator on the floating foundation unit is installed on the deck.
Further, adjacent columns of the floating foundation units are connected through connecting units, the connecting units are arranged at the waterline positions of the columns, and mooring points are shared between adjacent heave buoys of the floating foundation units.
The control method of the floating offshore wind power system comprises the following control modes:
1) When the adjacent floating foundation units move in opposite directions, the piston rods of the corresponding connecting units push the cylinder bodies, the piston moves along with the piston rods, the volume of one separation cavity is increased, the volume of the other separation cavity is reduced, liquid damping medium in the separation cavity with the reduced volume is extruded, part of liquid damping medium flows into the separation cavity with the increased volume through the piston holes and generates throttling damping so as to inhibit the adjacent floating foundation units from continuously moving in opposite directions, the other part of liquid damping medium is pushed into the hydraulic motor, and part of liquid damping medium in the hydraulic motor is pumped into the separation cavity with the increased volume so as to drive the output shaft to rotate and drive the generator to generate electricity;
2) When opposite movement is generated between the adjacent floating foundation units, the piston rods of the corresponding connecting units are pulled and move outwards, the piston moves along with the piston rods, the volume of one of the separation cavities is reduced, the volume of the other separation cavity is enlarged, the liquid damping medium in the separation cavity with the reduced volume is extruded, part of the liquid damping medium flows into the separation cavity with the enlarged volume through the piston holes and generates throttling damping so as to inhibit the continuous opposite movement between the adjacent floating foundation units, the other part of the liquid damping medium is pushed into the hydraulic motor, and part of the liquid damping medium in the hydraulic motor is pumped into the separation cavity with the enlarged volume so as to drive the output shaft to rotate and drive the generator to generate electricity.
Compared with the prior art, the invention has the beneficial effects that:
the floating offshore wind power system comprises a floating foundation platform, wherein the floating foundation platform comprises a plurality of floating foundation units, adjacent floating foundation units are connected through a connecting unit, and each floating foundation unit is provided with a wind turbine generator; when the adjacent floating foundation units move in opposite directions or in opposite directions, the piston moves in the cylinder body, the liquid damping medium flows between the two separation cavities, the liquid damping medium and the piston generate intense friction, the liquid damping medium generates huge throttling damping when passing through the piston hole, and therefore, the connecting unit can convert the motion of the floating foundation units in six degrees of freedom into the motion energy generated by the motion of the piston in the liquid damping medium under the environmental effect, one part of the motion energy is converted into heat by the piston to dissipate, the motion speed of the piston is gradually reduced, the purpose of damping energy consumption is achieved, the motion response between the adjacent floating foundation units is reduced, the other part of the motion energy is converted into electric energy by driving the output shaft of the hydraulic motor to rotate and drive the generator to generate electricity, the motion response between the adjacent floating foundation units is further suppressed, and the effect of energy dissipation is achieved. The connecting units can provide flexible floating support between adjacent floating foundation units, so that the bearing capacity of the whole floating foundation platform can be improved, wind turbine generators are installed on each floating foundation unit, a plurality of wind turbine generators can be installed on the whole floating foundation platform, larger turbine generator unit capacity can be borne, under the trend of large-scale wind turbine generators, if a traditional mode of bearing a single offshore wind turbine generator unit by a single foundation is adopted, the large-scale wind turbine generator units and the single foundation can be formed by the plurality of floating foundation units, and the large-scale wind turbine generators on each floating foundation unit cannot be formed by the plurality of floating foundation units.
In the invention, a generator circuit on each connecting unit is connected into a total wind power plant circuit formed by connecting wind turbine generator circuits in series; when the adjacent floating foundation units move in opposite directions or in opposite directions, the connecting units convert kinetic energy generated by the six-degree-of-freedom motion of the floating foundation units under the action of the environment into electric energy, the converted electric energy further improves the unit capacity of the whole floating offshore wind power system, in addition, when the wind power unit is powered off, the piston holes can be closed, and when the adjacent floating foundation units move in opposite directions or in opposite directions, the connecting units can convert the kinetic energy generated by the six-degree-of-freedom motion of the floating foundation units into electric energy more under the action of the environment.
Drawings
FIG. 1 is a schematic diagram of the front view of the connecting unit of the present invention including a piston rod;
FIG. 2 is a schematic front view of the connecting unit of the present invention including four piston rods;
FIG. 3 is a schematic side view of the four piston rods of FIG. 2;
FIG. 4 is a schematic top view of a floating offshore wind turbine system of the present invention when the floating foundation platform includes a plurality of rows of parallel arranged floating foundation platform segments;
FIG. 5 is a schematic view of the structure of one of the rows of floating foundation platform segments of FIG. 4;
FIG. 6 is a schematic perspective view of a connection unit when adjacent floating foundation units are in an initial state;
FIG. 7 is a schematic perspective view of a connection unit when a relative motion occurs between adjacent floating foundation units;
fig. 8 is a schematic perspective view of the connection unit when opposite motions are generated between adjacent floating foundation units.
The reference numerals in the drawings illustrate: 1. the floating foundation unit, 101, the upright post, 102, the heave pontoon, 2, the connecting unit, 201, the cylinder body, 202, the piston rod, 2021, the first piston rod, 2022, the second piston rod, 2023, the third piston rod, 2024, the fourth piston rod, 203, the flexible rod, 204, the piston, 205, the liquid damping medium, 206, the piston hole, 207, the hydraulic motor, 208, the generator, 209, the outer cylinder body, 210, the inner cylinder body, 3, the wind turbine generator, 401, the third mounting seat, 402, the fourth mounting seat, 5 and the mooring point.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to be limiting.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
1-4, a floating offshore wind power system comprises a floating foundation platform, wherein the floating foundation platform comprises a plurality of floating foundation units 1, adjacent floating foundation units 1 are connected through connecting units 2, each floating foundation unit 1 is provided with a wind turbine 3, and circuits of every 3-4 wind turbines 3 on the floating foundation platform are connected in series; the connecting unit 2 comprises a cylinder 201, a piston rod 202 is inserted in the cylinder 201, the piston rod 202 extends out from one end of the cylinder 201 and is fixedly connected with one end of a flexible rod 203, the other end of the flexible rod 203 is hinged with one floating foundation unit 1, the other end of the cylinder 201 is hinged with the other floating foundation unit 1, a piston 204 is fixedly sleeved on the piston rod 202 in the cylinder 201, the inner edge of the piston 204 is in sealing connection with the piston rod 202, the outer edge of the piston 204 is in sealing contact with the inner wall of the cylinder 201, the inner cavity of the cylinder 201 is divided into two separation cavities by the piston 204, liquid damping media 205 are respectively arranged in the two separation cavities, a piston hole 206 for communicating the two separation cavities is formed in the piston 204, the two separation cavities are also respectively connected with a hydraulic motor 207, and an output shaft of the hydraulic motor 207 is connected with a generator 208. Preferably, the piston 204 is disposed at the other end of the piston rod 202 within the cylinder 201.
When the adjacent floating foundation units 1 move in opposite directions or in opposite directions, the piston 204 moves in the cylinder 201, the liquid damping medium 205 flows between the two separation cavities, the liquid damping medium 205 generates intense friction with the piston 204, the liquid damping medium 205 generates huge throttling damping when passing through the piston hole 206, and the connecting unit 2 can convert kinetic energy generated by six degrees of freedom motion of the floating foundation units 1 under the environmental effect, one part of the kinetic energy generated by six degrees of freedom motion of the piston 204 in the liquid damping medium 205 is converted into heat to dissipate, so that the moving speed of the piston 204 is gradually reduced to achieve the aim of damping and energy consumption, thereby reducing the moving response between the adjacent floating foundation units 1, and the other part of the kinetic energy is generated by driving the output shaft of the hydraulic motor 207 to rotate and drive the generator 208 to convert the kinetic energy into electric energy, thereby further inhibiting the moving response between the adjacent floating foundation units 1, and achieving the effect of energy dissipation. Therefore, the connecting units 2 can provide flexible floating support between the adjacent floating foundation units 1, the bearing capacity of the whole floating foundation platform can be improved, the wind turbine generators 3 are installed on each floating foundation unit 1, the wind turbine generators 3 can be installed on the whole floating foundation platform, the wind turbine generators 3 are connected in series through circuits, larger unit capacity can be borne, under the trend of large-scale wind turbine generators 3, if a traditional mode that a single foundation is used for bearing a single offshore wind turbine generator 3 is adopted, the single offshore wind turbine generator 3 and the single foundation are all large, and the whole floating foundation platform is formed by a plurality of floating foundation units 1, so that each floating foundation unit 1 is not large, the wind turbine generators 3 on each floating foundation unit 1 are not large, the construction and transportation installation costs of each floating foundation unit 1 and each wind turbine generator 3 are lower, and the problems of large building difficulty, insufficient appliance exceeding bearing range, limited bearing capacity, limited towing capacity, and large bearing difficulty of a vessel can be avoided, and the problem of exceeding the large bearing range of the vessel can be avoided.
Wherein, flexible rod 203 can bend and deform, playing a certain role in vibration reduction.
Preferably, the number of the inner cavities of the cylinder 201 is two, the piston rod 202 is inserted into one of the inner cavities of the cylinder 201, the piston 204 divides the one of the inner cavities of the cylinder 201 into two separate cavities, and the hydraulic motor 207 and the generator 208 are arranged in the other inner cavity of the cylinder 201, see fig. 1.
Preferably, the other end of the flexible rod 203 is hinged to a third mount 401, the third mount 401 is fixed to one of the floating base units 1, the other end of the cylinder 201 is hinged to a fourth mount 402, and the fourth mount 402 is fixed to the other floating base unit 1, see fig. 1.
In one embodiment, the generator 208 circuit on each connection unit 2 is connected to the total wind farm circuit formed by the series connection of the circuits of the wind turbines 3. In this way, when opposite or opposite movement is generated between adjacent floating foundation units 1, the connecting unit 2 converts kinetic energy generated by six-degree-of-freedom movement of the floating foundation units 1 under the environmental action into electric energy, and the converted electric energy further improves the unit capacity of the whole floating offshore wind power system, in addition, when the wind power unit 3 is powered off, the piston hole 206 can be closed, so that when opposite or opposite movement is generated between the adjacent floating foundation units 1, the connecting unit 2 can convert more kinetic energy generated by six-degree-of-freedom movement of the floating foundation units 1 under the environmental action into electric energy.
In one embodiment of the present invention, in one embodiment,
as shown in fig. 2, the piston rods 202 and the flexible rods 203 of each connecting unit 2 are multiple and equal in number, the multiple piston rods 202 are parallel to each other, the cylinder 201 comprises an outer cylinder 209, multiple inner cylinders 210 equal in number to the piston rods 202 are arranged in the outer cylinder 209, one piston rod 202 is inserted into each inner cylinder 210, each piston rod 202 sequentially extends out of the inner cylinder 210 and the outer cylinder 209 and is fixedly connected with one end of the corresponding flexible rod 203, the other end of each flexible rod 203 is hinged with one floating foundation unit 1, the other end of the outer cylinder 209 is hinged with the other floating foundation unit 1, a piston 204 is sleeved and fixed on the piston rod 202 in the inner cylinder 210, the inner edge of the piston 204 is in sealing connection with the piston rod 202, the outer edge of the piston 204 is in sealing contact with the inner wall of the inner cylinder 210, the inner cavity of the inner cylinder 210 is divided into two inner separation cavities, liquid damping media 205 are respectively arranged in the two inner separation cavities, the piston 204 are respectively connected with a hydraulic motor 207, and the hydraulic motor 207 and a generator separation cavity 208 are respectively arranged in the outer cylinder 210. Preferably, as shown in fig. 3, the number of the piston rods 202 of each connection unit 2 is four, respectively called a first piston rod 2021, a second piston rod 2022, a third piston rod 2023 and a fourth piston rod 2024, wherein the axes of the first piston rod 2021 and the second piston rod 2022 are on the same horizontal plane as the axis of the external cylinder 209 and are respectively disposed on both sides of the axis of the external cylinder 209, wherein the axis of the third piston rod 2023 is directly below the axis of the external cylinder 209, and the axis of the fourth piston rod 2024 is directly above the axis of the external cylinder 209.
When the adjacent floating foundation units 1 move in opposite directions, the piston rods 202 of the corresponding connecting units 2 respectively push the corresponding inner cylinder bodies 210, each piston 204 moves along with the corresponding piston rod 202, the volume of one inner compartment of the corresponding inner cylinder body 210 is respectively increased and the volume of the other inner compartment is decreased, the liquid damping medium 205 in the smaller inner compartment is extruded, one part of the liquid damping medium 205 flows into the larger inner compartment through the piston holes 206 and generates throttling damping to inhibit the adjacent floating foundation units 1 from moving in opposite directions, and the other part of the liquid damping medium 205 enters the hydraulic motor 207 to drive the output shaft to rotate and drive the generator 208 to generate electricity; when opposite movement occurs between the adjacent floating foundation units 1, the piston rods 202 of the corresponding connecting units 2 are pulled and move outwards of the corresponding inner cylinders 210 respectively, each piston 204 moves along with the corresponding piston rod 202, the volume of one inner compartment of the corresponding inner cylinder 210 is reduced and the volume of the other inner compartment is increased respectively, the liquid damping medium 205 in the reduced inner compartment is extruded, and one part of the liquid damping medium 205 flows into the enlarged inner compartment through the piston holes 206 and generates throttling damping to inhibit the opposite movement between the adjacent floating foundation units 1, and the other part of the liquid damping medium 205 enters the hydraulic motor 207 to drive the output shaft to rotate and drive the generator 208 to generate electricity. The connection unit 2 comprising a plurality of piston rods 202 is thus better able to provide flexible floating support between adjacent floating foundation units 1.
Preferably, the other end of each flexible rod 203 is hinged to a first mount fixed to one of the floating foundation units 1, and the other end of the outer cylinder 209 is hinged to a second mount fixed to the other floating foundation unit 1.
In one embodiment of the present invention, in one embodiment,
as shown in fig. 4-5, the floating foundation platform comprises a plurality of parallel rows of floating foundation platform segments, each row of floating foundation platform segments comprising several of the floating foundation units 1, adjacent floating foundation units 1 in adjacent two rows of floating foundation platform segments being staggered and sharing mooring points 5. Because each floating foundation unit 1 is provided with the wind turbine generator 3, the adjacent floating foundation units 1 in the adjacent two rows of floating foundation platform sections are staggered, the influence of wake effects of the wind turbine generator 3 can be reduced, and a plurality of wind turbine generators 3 on the floating foundation platform can generate larger power generation benefits; wherein, the adjacent floating foundation units 1 in the adjacent two rows of floating foundation platform segments share the mooring point 5, the mooring point 5 is positioned in the seabed below the sea surface, the mooring point 5 is provided with the anchoring device, the anchoring device is connected with the corresponding floating foundation units 1 through the mooring cable, the number of the anchoring devices can be saved through sharing the mooring point 5, and the installation cost is reduced.
The floating foundation unit 1 comprises a deck, three stand columns 101 are fixed on the lower surface of the deck, the three stand columns 101 are evenly distributed on the lower surface of the deck, the stand columns 101 are connected through a cross brace, heave pontoons 102 are fixed at the lower end of each stand column 101, and the wind turbine generator 3 on each floating foundation unit 1 is installed on the deck as shown in fig. 6.
As shown in fig. 6, adjacent columns 101 of adjacent floating foundation units 1 are connected by connecting units 2, and the connecting units 2 are arranged at the positions of the water lines of the columns 101, so that the connecting units 2 are convenient to install, the mooring points 5 are shared between adjacent heave buoys 102 of the adjacent floating foundation units 1, and thus, the anchoring devices at the mooring points 5 are connected with the corresponding heave buoys 102 of the corresponding floating foundation units 1 by mooring lines. Wherein a in fig. 6 represents the waterline.
When the connection unit 2 comprises a piston rod 202, the control method of the floating offshore wind power system comprises the following control modes:
1) When the floating foundation units 1 move in opposite directions under the action of waves and tide, as shown in fig. 7, when the adjacent floating foundation units 1 move in opposite directions, the piston rods 202 of the corresponding connecting units 2 push the cylinder 201, the pistons 204 move along with the piston rods 202, the volume of one of the separating chambers is increased and the volume of the other separating chamber is decreased, the liquid damping medium 205 in the separating chamber with the decreased volume is extruded, part of the liquid damping medium 205 flows into the separating chamber with the increased volume through the piston holes 206 and generates throttling damping to inhibit the adjacent floating foundation units 1 from moving in opposite directions, the other part of the liquid damping medium 205 is pushed into the hydraulic motor 207, and part of the liquid damping medium 205 in the hydraulic motor 207 is pumped into the separating chamber with the increased volume to drive the output shaft to rotate and drive the generator 208 to generate electricity;
2) As shown in fig. 8, when opposite movement or height Cheng Chashi is generated between the adjacent floating base units 1, the piston rods 202 of the corresponding connection units 2 are pulled and move outwards of the cylinder 201, the piston 204 moves along with the piston rods 202, the volume of one of the separation chambers is reduced and the volume of the other separation chamber is increased, the liquid damping medium 205 in the separation chamber with the reduced volume is extruded, and one part of the liquid damping medium 205 flows into the separation chamber with the increased volume through the piston holes 206 and generates throttling damping to inhibit the opposite movement between the adjacent floating base units 1, the other part of the liquid damping medium 205 is pushed into the hydraulic motor 207, and one part of the liquid damping medium 205 in the hydraulic motor 207 is pumped into the separation chamber with the increased volume to drive the output shaft to rotate and drive the generator 208 to generate electricity.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (10)
1. A floating offshore wind power system, characterized by: the wind turbine generator system comprises a floating foundation platform, wherein the floating foundation platform comprises a plurality of floating foundation units (1), adjacent floating foundation units (1) are connected through connecting units (2), and each floating foundation unit (1) is provided with a wind turbine generator system (3); the connecting unit (2) comprises a cylinder body (201), a piston rod (202) is arranged in the cylinder body (201), the piston rod (202) extends out from one end of the cylinder body (201) and is fixedly connected with one end of a flexible rod (203), the other end of the flexible rod (203) is hinged with one floating foundation unit (1), the other end of the cylinder body (201) is hinged with the other floating foundation unit (1), a piston (204) is arranged on the piston rod (202), the inner cavity of the cylinder body (201) is divided into two separation cavities by the piston (204), liquid damping media (205) are arranged in the two separation cavities, piston holes (206) used for communicating the two separation cavities are formed in the piston (204), the two separation cavities are also respectively connected with a hydraulic motor (207), and an output shaft of the hydraulic motor (207) is connected with a generator (208).
2. A floating offshore wind power system according to claim 1, wherein: and a generator (208) circuit on each connecting unit (2) is connected into a total wind farm circuit formed by connecting the circuits of the wind turbines (3) in series.
3. A floating offshore wind power system according to claim 2, wherein: the piston rods (202) and the flexible rods (203) of each connecting unit (2) are multiple and equal in number, the piston rods (202) are parallel to each other, the cylinder body (201) comprises an outer cylinder body (209), a plurality of inner cylinder bodies (210) equal in number to the piston rods (202) are arranged in the outer cylinder body (209), one piston rod (202) is inserted in each inner cylinder body (210), each piston rod (202) sequentially extends out of the inner cylinder body (210) and the outer cylinder body (209) and is fixedly connected with one end of the corresponding flexible rod (203), the other end of each flexible rod (203) is hinged with one floating foundation unit (1), the other end of each outer cylinder body (209) is hinged with the other floating foundation unit (1), a piston (204) is fixedly sleeved on the piston rod (202) in the inner cylinder body (210), the inner edge of each piston (204) is in sealing connection with the inner edge of the piston rod (202) and the outer edge of each piston rod (210) is in sealing contact with the inner wall of the inner cylinder body (210), each piston (204) is divided into two inner piston compartments (205) which are respectively connected with two inner hydraulic media (207) in each motor (207), the hydraulic motor (207) and the generator (208) are both arranged in the outer cylinder (209) and outside the inner cylinder (210).
4. A floating offshore wind power system according to claim 3, wherein: the other end of each flexible rod (203) is hinged to a first mounting seat, the first mounting seat is fixed on one floating foundation unit (1), the other end of the outer cylinder body (209) is hinged to a second mounting seat, and the second mounting seat is fixed on the other floating foundation unit (1).
5. A floating offshore wind power system according to claim 2, wherein: the two inner cavities of the cylinder body (201) are arranged, the piston rod (202) is inserted into one inner cavity of the cylinder body (201), the piston (204) divides the one inner cavity of the cylinder body (201) into two separation cavities, and the hydraulic motor (207) and the generator (208) are arranged in the other inner cavity of the cylinder body (201).
6. A floating offshore wind power system according to claim 2, wherein: the other end of the flexible rod (203) is hinged to a third mounting seat (401), the third mounting seat (401) is fixed on one floating foundation unit (1), the other end of the cylinder body (201) is hinged to a fourth mounting seat (402), and the fourth mounting seat (402) is fixed on the other floating foundation unit (1).
7. A floating offshore wind power system according to claim 2, wherein: the floating foundation platform comprises a plurality of parallel floating foundation platform segments, wherein each row of floating foundation platform segments comprises a plurality of floating foundation units (1), and adjacent floating foundation units (1) in two adjacent rows of floating foundation platform segments are staggered and share mooring points (5).
8. A floating offshore wind power system as claimed in claim 7, wherein: the floating foundation unit (1) comprises a deck, three stand columns (101) are fixed on the lower surface of the deck, the three stand columns (101) are evenly distributed on the lower surface of the deck, the stand columns (101) are connected through a cross brace, heave pontoons (102) are fixed at the lower ends of each stand column (101), and a wind turbine generator system (3) on the floating foundation unit (1) is installed on the deck.
9. A floating offshore wind power system as claimed in claim 8, wherein: the adjacent columns (101) of the floating foundation units (1) are connected through the connecting units (2), the connecting units (2) are arranged at the waterline positions of the columns (101), and mooring points (5) are shared between adjacent heave pontoons (102) of the floating foundation units (1).
10. A control method of a floating offshore wind power system according to any one of claims 2-9, characterized by comprising the following control modes:
1) When the adjacent floating foundation units (1) move towards each other, the piston rods (202) of the corresponding connecting units (2) push towards the inside of the cylinder body (201), the piston (204) moves along with the piston rods (202), the volume of one of the separation cavities is increased, the volume of the other separation cavity is reduced, the liquid damping medium (205) in the separation cavity with the reduced volume is extruded, one part of the liquid damping medium (205) flows into the separation cavity with the increased volume through the piston holes (206) and generates throttling damping so as to inhibit the adjacent floating foundation units (1) from continuously moving towards each other, the other part of the liquid damping medium (205) is pushed into the hydraulic motor (207), and one part of the liquid damping medium (205) in the hydraulic motor (207) is pumped into the separation cavity with the increased volume so as to drive the output shaft to rotate and drive the generator (208) to generate electricity;
2) When opposite movement is generated between the adjacent floating foundation units (1), the piston rods (202) of the corresponding connecting units (2) are pulled and move outwards of the cylinder bodies (201), the piston (204) moves along with the piston rods (202), the volume of one of the separation cavities is reduced, the volume of the other separation cavity is enlarged, the liquid damping medium (205) in the separation cavity with the reduced volume is extruded, part of the liquid damping medium (205) flows into the separation cavity with the enlarged volume through the piston holes (206) and generates throttling damping to inhibit the adjacent floating foundation units (1) from continuously generating opposite movement, the other part of the liquid damping medium (205) is pushed into the hydraulic motor (207), and part of the liquid damping medium (205) in the hydraulic motor (207) is pumped into the separation cavity with the enlarged volume to drive the output shaft to rotate and drive the generator (208) to generate electricity.
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| CN202311073364.8A CN116950849B (en) | 2023-08-24 | 2023-08-24 | Floating type offshore wind power system |
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