A floating vertical axis wind power platform with an inner rotating tower and single point mooring

Abstract

The application discloses a floating vertical axis wind power platform adopting an inner rotating tower single-point mooring, which comprises a barge assembly, a column assembly, a mooring assembly and a power generation and damping coupling assembly; the barge assembly is composed of a pentagon barge by rigidly connecting a triangular pontoon and a quadrilateral pontoon, and a moon pool is arranged at the center position of the quadrilateral pontoon; the column assembly comprises a bow column and four rear columns; the mooring assembly comprises a single-point buoy, an in-cabin slip ring rotating tower and a mooring anchor chain unit; the upper end of the single-point buoy is fixedly connected with the triangular pontoon; the single-point buoy is nested with the in-cabin slip ring rotating tower and is rotationally connected; the lower end of the in-cabin slip ring rotating tower is fixedly connected with the mooring anchor chain unit; the lower end of the mooring anchor chain unit is fixedly connected with the seabed; the power generation and damping coupling assembly comprises a floater, a generator and a first throttle valve; the floater is movably connected with the inner side wall of the moon pool; the input shaft of the generator is drivingly connected with the floater; and the first throttle valve is installed in the current output circuit of the generator.

Description

Technical Field

[0001] This invention belongs to the field of wind power, and particularly relates to a floating vertical axis wind power platform with single-point mooring using an internal turret. Background Technology

[0002] As the industry develops towards deep-sea and clustered deployments, the installation of floating horizontal axis wind turbines is becoming increasingly difficult, and the maintenance costs for deep-sea operations are rising. Horizontal axis wind turbines are installed atop towers, resulting in a high center of gravity and eccentric loads on the structure, reducing the platform's safety in wind and waves. While larger floating foundations improve seakeeping, they sacrifice economic efficiency. Horizontal axis wind turbines also have a significant wake effect, and the average efficiency of clustered turbines is significantly lower than that of individual turbines. It is foreseeable that bottlenecks in the design, manufacturing, transportation, and installation of 20MW and above horizontal axis wind turbines will gradually emerge.

[0003] Vertical axis wind turbines have advantages such as omnidirectional wind orientation, low center of gravity and simple mechanical equipment, high efficiency of array layout, low start-up wind speed and high cut-out wind speed, small impact of blade alternating load, low noise, and no eccentric load. At the same time, they have relatively low requirements for manufacturing, transportation, installation resources and operation and maintenance, making them naturally suitable for floating platforms. Their application prospects have been re-emphasized by the industry.

[0004] Floating offshore wind power can be categorized into barge-type, monopole-type, semi-submersible, and tension leg-type based on their floating structure. Vertical axis wind turbines, due to their good self-balancing ability, low center of gravity, and wake gain effect, are naturally suited to the lower-cost barge-type platform. The five-pole barge-type offshore wind power platform is one such barge-type floating structure, with five columns on the upper part of the barge, each capable of housing a vertical axis wind turbine. Existing five-pole barge-type offshore wind power platforms are typically arranged in a regular quadrilateral or pentagonal shape, resulting in a large waterline area. This leads to significant additional loads from waves and sea winds, large overall platform movement, and poor stability. Furthermore, the traditional staggered, evenly spaced vertical axis wind turbines on these platforms fail to fully utilize the wake gain characteristics of the turbines, resulting in reduced power generation efficiency, increased cost per kilowatt-hour, and a uniform stress area in all directions. Environmental loads from any direction cause equal damage to the structure, leading to low structural efficiency and high construction costs and steel consumption. In addition, traditional multi-point mooring systems require a significant increase in mooring length, mooring diameter, and anchor chain size, resulting in high costs and becoming a major obstacle to the large-scale development of floating wind power.

[0005] In addition, the existing scheme has a fixed moon pool structure, which cannot adapt to the optimal damping requirements under different sea conditions; the connection between the columns and the barge is mostly rigid, and the wind load is directly transmitted to the barge, which aggravates structural fatigue; the platform is prone to tilting under wind, waves and load changes, and the traditional active ballast system has high energy consumption and low reliability.

[0006] Therefore, there is an urgent need to design a floating vertical axis wind power platform with an internal turret single-point mooring system to solve the problems mentioned above. Summary of the Invention

[0007] The purpose of this invention is to provide a floating vertical axis wind power platform with single-point mooring using an internal turret, which has the advantages of high power generation efficiency and low cost.

[0008] To achieve the above objectives, the specific technical solution of the present invention for a floating vertical axis wind power platform with single-point mooring using an internal turret is as follows: A floating vertical axis wind power platform with internal turret single-point mooring includes: barge assembly, column assembly, mooring assembly and power generation and vibration reduction coupling assembly; The barge assembly consists of a pentagonal barge formed by rigidly connecting triangular and quadrilateral pontoons. A moon pool is provided at the center of the quadrilateral pontoon, and the moon pool runs through the top and bottom surfaces of the quadrilateral pontoon. The column assembly includes a bow column and four aft columns. The bow column is vertically fixed at the center of gravity of the triangular pontoon, and the four aft columns are respectively vertically arranged on the quadrilateral pontoon, and the four aft columns are evenly distributed symmetrically around the center of the quadrilateral pontoon. The mooring assembly is located at the bow of the pentagonal barge. The mooring assembly includes a single-point buoy, an internal slip ring turret, and a mooring anchor chain unit. The upper end of the single-point buoy is fixedly connected to the triangular buoy box. The internal slip ring turret is nested inside the single-point buoy and rotatably connected. The lower end of the internal slip ring turret is fixedly connected to the mooring anchor chain unit. The lower end of the mooring anchor chain unit is fixedly connected to the seabed. The power generation and vibration reduction coupling assembly includes a float, a generator, and a first throttle valve. The float is movably connected to the inner wall of the moon pool, the input shaft of the generator is drivenly connected to the float, and the first throttle valve is installed in the current output circuit of the generator.

[0009] Furthermore, the floating vertical axis wind power platform with single-point mooring using an inner turret also includes a drive assembly. The drive assembly includes a sliding track and a drive component. The lower end of the rear column is slidably mounted on the sliding track. The fixed end of the drive component is connected to the quadrilateral pontoon, and the movable end of the drive component is connected to the rear column. The drive component drives the rear column to move radially along the sliding track.

[0010] Furthermore, the floating vertical axis wind power platform with single-point mooring using an internal turret also includes a ballast assembly. The ballast assembly includes multiple independent ballast water tanks disposed inside the triangular buoy and the quadrilateral buoy, as well as connecting pipelines connecting each ballast water tank to the center position of the slip ring turret inside the tank.

[0011] Furthermore, the power generation vibration reduction coupling assembly also includes a motion sensor and a first controller; the motion sensor is fixed on the triangular pontoon, the quadrilateral pontoon, the bow column, or the rear column; the first controller is electrically connected to the motion sensor and the first throttle valve respectively.

[0012] Furthermore, a conical buoy cavity is provided at the connection between the single-point buoy and the triangular buoy box. The conical buoy cavity is a hollow conical channel that penetrates the top and bottom surfaces of the bow of the pentagonal barge. The outer wall of the single-point buoy and the inner wall of the conical buoy cavity form a nested rigid contact connection.

[0013] Furthermore, the in-cabin slip ring turret includes a slewing bearing, an electric slip ring, and a chain disc; the outer ring of the slewing bearing is fixedly connected to the inner wall of the single-point float, and the inner ring of the slewing bearing is fixedly connected to the chain disc; the stationary part of the electric slip ring is fixed to the single-point float, and the rotating part of the electric slip ring is fixed to the chain disc; the upper end of the mooring anchor chain unit is fixedly connected to the chain disc.

[0014] Furthermore, the floating vertical axis wind power platform with internal turret single-point mooring also includes a damping vibration reduction component, which is disposed between the bow column and the triangular pontoon or the rear column and the quadrilateral pontoon.

[0015] Furthermore, the damping and vibration reduction assembly includes an inner ring, an outer ring, and a viscoelastic damping material layer; the upper end face of the inner ring is fixedly connected to the lower end face of the column, the viscoelastic damping material layer is filled between the lower end face of the inner ring and the upper end face of the outer ring, the lower end face of the outer ring is connected to the upper surface of the triangular pontoon or the quadrilateral pontoon, and the inner ring and the outer ring are coaxially sleeved and have a clearance fit.

[0016] Furthermore, the lower end of the rear column is provided with a slider that matches the sliding track.

[0017] Furthermore, each of the ballast water tanks has an outlet at its bottom, one end of the connecting pipe is sealed to the outlet, and the other end of the connecting pipe is sealed to the center interface of the slip ring turret inside the tank.

[0018] The floating vertical axis wind power platform with internal turret single-point mooring of the present invention has the following advantages: 1. This invention adopts a barge-type floating foundation, which can reduce the span in the wave-facing direction, improve the problem of low efficiency of large-span platform structures, and thus save steel. This invention adopts a structural form that combines column components and barge components to ensure that the motor is located at a certain height above the horizontal plane, thus solving the problem of waves on the barge deck under severe sea conditions.

[0019] 2. The moon pool structure, located within the quadrilateral pontoon of the barge, can offset some of the additional loads caused by waves and wind through fluid oscillation within the moon pool structure, thereby reducing the overall load on the wind turbine platform. Simultaneously, it increases the damping of the entire floating offshore wind turbine platform to external excitations such as waves and wind, reducing the platform's motion response and effectively controlling the amplitude of heave, roll, and pitch movements, thus optimizing motion performance. This improves the stability of the floating offshore wind turbine platform, ensuring stable operation of the wind turbine generators, increasing power generation efficiency, and reducing the cost per kilowatt-hour.

[0020] 3. The moon pool structure, with its hollow channel, allows seawater to flow into the floating offshore wind turbine platform when it is positioned at sea. The seawater oscillates within the hollow channel, increasing the platform's damping against external stimuli such as waves and wind. This reduces the platform's motion response, making it more stable and lowering its overall load and cost. The chamfered square shape of the moon pool produces even stronger flow separation, generating higher damping and further reducing the response amplitude. It also avoids stress concentration at the pool's edges.

[0021] 3. The five columns are arranged symmetrically along an axis, with one section connected to the barge and the other section connected to the wind turbine, forming a barge-column support system with good stability. This gives the floating offshore wind power platform good resistance to wave impact and better structural stability.

[0022] 4. The single-point buoy remains relatively stationary with respect to the hull, protecting the internal turret structure from damage caused by hull collisions. It also tightly connects the single-point mooring assembly to the barge assembly. The single-point buoy provides buoyancy to the single-point mooring system, thus supporting the weight of the anchor chain + steel cable combination mooring cable and underwater cable, allowing for a wider range of water depth adaptability. The internal turret rotates relative to the single-point buoy and remains relatively stationary with respect to the mooring anchor chain, guiding the floating wind turbine platform to freely rotate within a 360° range around the single offshore mooring base, adapting to wind, waves, or currents. This ensures the hull is always in the direction of least environmental load, minimizing the environmental load it experiences. The electric slip ring allows for power transmission between the static and dynamic structures during rotation. The mooring anchor chain transfers mooring forces to the chain chain structure, which, through the internal turret, restricts the floating platform's drift within a certain range, ensuring its stability. When the mooring chain acts on the anchor pile, it mainly generates axial force in the first connector, which can better utilize the tensile strength of the steel structure of the anchor pile, and at the same time transfer the anchoring force of the seabed to the mooring chain.

[0023] 5. This invention employs an inner turret single-point mooring system, which significantly reduces the number of mooring cables, improves mooring cable utilization, and lowers mooring costs. The inner turret single-point mooring system also provides a weather vane effect for the floating foundation and wind turbines, reducing the environmental load on the floating body, improving structural efficiency, and significantly reducing the amount of steel used in the platform structure. In shallow to medium water depths, this invention uses fixed anchors capable of resisting horizontal and vertical loads, which significantly reduces the length of the mooring cables, ensuring they are mostly in a tensioned or semi-tensioned state. This results in a small mooring radius, minimal horizontal displacement of the floating foundation, high mooring recovery stiffness, and applicability to varying tidal conditions in shallow to medium water depths. Furthermore, by rationally arranging the orientation of the vertical axis wind turbines and utilizing their wake gain effect, this invention improves the wind energy utilization efficiency of the vertical axis wind turbines and reduces power generation costs.

[0024] 7. The drive components can dynamically optimize the turbine spacing based on real-time wind direction, converting wake interference into wake gain, thus improving the overall power generation efficiency by 15%~25%. The power generation and vibration reduction coupling components convert dissipated wave energy into electrical energy, enabling the platform to be self-powered. Simultaneously, by adjusting the opening of the first throttle valve, the float damping is changed, actively suppressing the platform's heave response. The damping and vibration reduction components reduce the high-frequency alternating load transmitted from the columns to the barge by more than 80%, increasing the fatigue life of key barge nodes by 2~3 times. The ballast components utilize gravity to achieve zero-energy platform self-balancing, reducing the maximum static tilt angle from 3.2° to 0.5°. All subsystems work together to achieve full-condition adaptive operation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the main structure of the floating vertical axis wind power platform with single-point mooring using an inner turret according to the present invention. Figure 2This is a top view of the floating vertical axis wind power platform with single-point mooring using an internal turret, as described in this invention. Figure 3 This is a schematic diagram of the mooring assembly structure of the floating vertical axis wind power platform with single-point mooring using an internal turret, as described in this invention.

[0026] Explanation of markings in the diagram: 1. Barge assembly; 11. Triangular buoy; 12. Quadrilateral buoy; 13. Moon pool; 2. Column assembly; 21. Bow column; 22. Aft column; 3. Mooring assembly; 31. Single-point buoy; 32. Internal slip ring turret; 33. Mooring chain unit; 4. Fixed anchor; 5. Vertical axis wind turbine. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0029] The following is a reference to the appendix. Figure 1 To be continued Figure 3 This invention describes a floating vertical axis wind power platform employing an internal turret single-point mooring system.

[0030] like Figures 1 to 3 As shown, a floating vertical axis wind power platform with single-point mooring using an internal turret includes: a barge assembly 1, a column assembly 2, a mooring assembly 3, and a power generation and vibration reduction coupling assembly. The barge assembly 1 is a pentagonal barge formed by rigidly connecting a triangular pontoon 11 and a quadrilateral pontoon 12. A moon pool 13 is provided at the center of the quadrilateral pontoon 12. The moon pool 13 penetrates the top and bottom surfaces of the quadrilateral pontoon 12. Preferably, the horizontal cross-section of the moon pool 13 is a chamfered quadrilateral, and the ratio of the chamfer radius to the side length of the moon pool 13 is 0.1 to 0.25. The horizontal cross-section of the triangular pontoon 11 is an isosceles triangle, and the horizontal cross-section of the quadrilateral pontoon 12 is a square. The moon pool 13 structure set in the quadrilateral pontoon 12 can offset part of the additional load caused by waves and wind through fluid oscillation within the moon pool 13 structure, thereby reducing the overall load of the wind power platform. At the same time, it increases the damping of the entire floating offshore wind power platform to external excitations such as waves and wind, reduces the platform's motion response, effectively controls the motion amplitude of the offshore wind power platform in heave, roll and pitch, optimizes motion performance, thereby improving the stability of the floating offshore wind power platform, enabling the wind turbine generator to operate stably, improving power generation efficiency, and reducing costs. By creating a hollow channel in the quadrilateral pontoon 12 to form a moon pool 13 structure, the damping of the floating offshore wind power platform can be increased. As a key property that causes energy dissipation, the main sources of damping are the piston-like damping generated by waves entering the hollow channel and the damping generated by fluid separation at the bottom inlet of the hollow channel.

[0031] The equations of motion for a floating offshore wind power platform are as follows: In the formula, M is the mass matrix of the offshore wind power platform, A(ω) is the additional mass matrix of the offshore wind power platform, n is the acceleration vector of the overall system, and B(ω) is the damping matrix of the offshore wind power platform. Let C be the velocity vector of the overall system, and C be the stiffness matrix of the offshore wind power platform. This represents the six-degree-of-freedom displacement vector of the entire system. The external excitation forces are mainly wind and wave loads. The Moon Pool 13 structure can improve the damping of the floating offshore wind turbine platform, that is, increase the damping term B(ω) in the equation of motion, and reduce the amplitude of the floating offshore wind turbine platform's motion caused by wave incidence. (That is, the six-degree-of-freedom displacement vector of the overall system) will decrease, which means the motion amplitude of the floating offshore wind power platform will decrease.

[0032] The support column assembly 2 includes a bow column 21 and four rear columns 22. The bow column 21 is vertically fixed to the center of gravity of the triangular pontoon 11. The four rear columns 22 are respectively vertically arranged on the quadrilateral pontoon 12, and are evenly distributed symmetrically around the center of the quadrilateral pontoon 12. Each rear column 22 is equidistant from the center of the quadrilateral pontoon 12, and the angle between any rear column 22 and any two adjacent rear columns is 90°. The support column assembly 2 plays a very important supporting role for the upper wind turbine, ensuring that the upper wind turbine structure can withstand the wind force at the design height and guaranteeing the safe and stable operation of the upper wind turbine. The mooring assembly 3 is located at the bow of the pentagonal barge. The mooring assembly 3 includes a single-point buoy 31, an internal slip ring turret 32, and a mooring anchor chain unit 33. The upper end of the single-point buoy 31 is fixedly connected to the triangular buoy box 11. The internal slip ring turret 32 ​​is nested inside the single-point buoy 31 and rotatably connected. The lower end of the internal slip ring turret 32 ​​is fixedly connected to the mooring anchor chain unit 33. The lower end of the mooring anchor chain unit 33 is fixedly connected to the seabed through a fixed anchor 4. A conical buoy cavity is provided at the connection between the single-point buoy 31 and the triangular buoy box 11. The conical buoy cavity is a hollow conical channel that penetrates the top and bottom surfaces of the bow of the pentagonal barge. The outer wall of the single-point buoy 31 and the inner wall of the conical buoy cavity form a nested rigid contact connection. When the buoy is connected to the hull, the buoy will fit perfectly into the buoy cavity and form a nested connection with the hull. This design makes the buoy's stress distribution in waves more favorable. The single-point buoy 31 includes a conical buoy, a hydraulic locking device, and a single-point conical groove. The conical buoy provides the buoyancy required for the single-point mooring system. The hydraulic locking device connects the conical buoy to the hull, forming an integral unit with the hull through a mechanical locking device, ensuring the conical buoy remains relatively stationary with respect to the barge. The single-point conical groove connects the conical buoy to the internal slip ring turret 32, preventing the internal slip ring turret 32 ​​from detaching during operation. The internal slip ring turret 32 ​​includes a slewing bearing, an electric slip ring, and a chain. The outer ring of the slewing bearing is connected to the single-point buoy... The inner wall of the cylinder 31 is fixedly connected, and the inner ring of the slewing bearing is fixedly connected to the chain disk; the stationary part of the electric slip ring is fixed to the single-point buoy 31, and the rotating part of the electric slip ring is fixed to the chain disk; the upper end of the mooring anchor chain unit 33 is fixedly connected to the chain disk, and one end of the slip ring turret 32 ​​in the cabin is rotatably connected to the mooring cable, and the other end is connected to the single-point buoy 31, so as to transfer the restoring force provided by the mooring anchor chain system to the single-point buoy 31, so that the hull drifts within a certain range according to the wind vane effect, effectively reducing the environmental load of the floating platform, and realizing the conversion of the power transmission cable from stationary to rotating. The mooring anchor chain unit 33 includes an anchor chain, a pile foundation, and auxiliary control equipment. The upper part of the anchor chain is connected to the turret chain, and the lower part is connected to the pile foundation, bearing tension and transmitting load. The pile foundation is the fixed end of the mooring system. The upper part is connected to the anchor chain, and the lower part is inserted into the seabed. It provides anchoring force by gripping the seabed soil or rocks, providing positioning function for the platform. The auxiliary control equipment is used to adjust the state of the anchor chain to ensure the overall stability of the system.

[0033] Preferably, the mooring cable is made of high-strength, damage-resistant, and corrosion-resistant materials such as polyester fiber, nylon, or steel wire rope.

[0034] Preferably, the floating vertical axis wind turbine platform with internal turret single-point mooring also includes a hoisting winch, which is located on the deck and controlled by a hydraulic system. This winch is used for the single-point floating hull hoisting operation during rendezvous work.

[0035] Preferably, the fixed anchor 4 is an anchor structure that can resist horizontal and vertical mooring forces, such as a gravity anchor, suction anchor, pile anchor, etc.

[0036] The power generation vibration damping coupling assembly includes a float, a generator, and a first throttle valve. The float is movably connected to the inner wall of the moon pool 13. Preferably, the float is movably connected to the inner wall of the moon pool 13 using an elastic element or a hydraulic rod. The input shaft of the generator is drivenly connected to the float. The first throttle valve is installed in the current output circuit of the generator. The power generation vibration damping coupling assembly also includes a motion sensor and a first controller. The motion sensor is fixed to the triangular float 11, the quadrilateral float 12, the bow column 21, or the rear column 22. The controller is electrically connected to the motion sensor and the first throttle valve respectively. The first throttle valve is used to change the damping force of the float's motion, thereby adjusting the hydrodynamic damping characteristics of the moon pool 13. The moon pool 13 structure set in the quadrilateral pontoon 12 can offset part of the additional load caused by waves and wind through fluid oscillation within the moon pool 13 structure, thereby reducing the overall load of the wind power platform. At the same time, it increases the damping of the entire floating offshore wind power platform to external excitations such as waves and wind, reduces the platform's motion response, effectively controls the motion amplitude of the offshore wind power platform in heave, roll and pitch, and optimizes motion performance.

[0037] Furthermore, the floating vertical axis wind power platform with single-point mooring using an inner turret also includes a drive assembly. The drive assembly includes a sliding rail and a drive component. The lower end of the rear column 22 is slidably mounted on the sliding rail. The fixed end of the drive component is connected to the quadrilateral pontoon 12, and the movable end of the drive component is connected to the rear column 22. The drive component drives the rear column 22 to move radially along the sliding rail. The sliding rail is a T-slot rail or a dovetail rail. The lower end of the rear column 22 is provided with a slider that matches the sliding rail. The drive component is a hydraulic cylinder. The cylinder body of the hydraulic cylinder is fixed to the upper surface of the quadrilateral pontoon 12, and the end of the piston rod of the hydraulic cylinder is hinged to the lower part of the rear column 22.

[0038] Furthermore, the floating vertical axis wind power platform with single-point mooring using an internal turret also includes a ballast assembly. The ballast assembly includes multiple independent ballast water tanks located inside the triangular buoy 11 and the quadrilateral buoy 12, and connecting pipes linking each ballast water tank to the center of the internal slip ring turret 32. Each ballast water tank has an outlet at its bottom. One end of the connecting pipe is sealed to the outlet, and the other end converges and is sealed to the center interface of the internal slip ring turret 32. The connecting pipe contains a one-way valve and a second throttle valve. The one-way valve allows seawater to flow only from the ballast water tanks to the center of the turret, and the second throttle valve regulates the flow rate. A rotary sealing joint is located at the center interface of the internal slip ring turret 32. The converging end of the connecting pipe is fixedly connected to the stationary end of the rotary sealing joint, and the rotating end of the rotary sealing joint is connected to the center channel of the internal slip ring turret 32.

[0039] Furthermore, the floating vertical axis wind power platform with single-point mooring using an inner turret also includes a damping vibration reduction component, which is disposed between the bow column 21 and the triangular pontoon 11 or the rear column 22 and the quadrilateral pontoon 12.

[0040] Furthermore, the damping vibration reduction assembly includes an inner ring, an outer ring, and a viscoelastic damping material layer; the upper end face of the inner ring is fixedly connected to the lower end face of the column, the viscoelastic damping material layer is filled between the lower end face of the inner ring and the upper end face of the outer ring, the lower end face of the outer ring is connected to the upper surface of the triangular float 11 or the quadrilateral float 12, the inner ring and the outer ring are coaxially sleeved and have a clearance fit, the viscoelastic damping material is high-damping rubber with a loss factor ≥0.3; the radial gap between the inner ring and the outer ring is 5mm to 20mm.

[0041] Furthermore, the drive assembly also includes an anemometer and a second controller. The anemometer is mounted on the bow column 21 or the rear column 22. The second controller is electrically connected to the anemometer and the drive unit respectively. The anemometer collects wind direction data in real time. The second controller drives the drive unit to push the four rear columns 22 to move radially, dynamically optimizing the fan spacing to utilize wake gain.

[0042] The workflow of a floating vertical axis wind turbine platform with single-point mooring using an internal turret is as follows: The platform is fixed to the seabed via a single-point buoy 31 nested with an internal slip ring turret 32 ​​and rotatably connected to the mooring anchor chain unit 33 through a slewing bearing. Under the action of wind, waves, and currents, it can freely rotate 360° around the center of the turret, achieving a wind vane effect with the bow facing the wind. An anemometer installed on the column assembly 2 collects wind direction data in real time. The second controller drives the drive components on the sliding track to push the four rear columns 22 to move radially, dynamically optimizing the turbine spacing to utilize wake gain. The vertical axis wind turbine 5 generates electricity and transmits the power from the dynamic structure to the static submarine cable via an electric slip ring. Simultaneously, the barge assembly 1 with its quadrilateral buoy... Within the moon pool 13 at center 12, the buoy of the power generation and vibration damping coupling assembly oscillates with the waves, driving the generator to generate electricity to power the platform. Motion sensors collect platform attitude signals, and the controller adjusts the opening of the throttle valve to change the buoy damping and actively suppress platform heave. The damping and vibration damping assembly (inner ring, outer ring, and viscoelastic damping material layer) between column assembly 2 and barge assembly 1 absorbs high-frequency vibrations. When the platform tilts, the seawater in each independent ballast tank of the ballast assembly automatically flows to the lower compartment through the connecting pipeline (equipped with a one-way valve and a second throttle valve) under the action of gravity, generating a reverse torque to restore the platform's balance. The rotary sealing joint ensures that the pipeline remains connected when the platform rotates. This achieves adaptive operation under all working conditions.

[0043] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A floating vertical axis wind power platform employing an internal turret single-point mooring system, characterized in that, include: Barge components, column components, mooring components, and power generation and vibration damping coupling components; The barge assembly consists of a pentagonal barge formed by rigidly connecting triangular and quadrilateral pontoons. A moon pool is provided at the center of the quadrilateral pontoon, and the moon pool runs through the top and bottom surfaces of the quadrilateral pontoon. The column assembly includes a bow column and four aft columns. The bow column is vertically fixed at the center of gravity of the triangular pontoon, and the four aft columns are respectively vertically arranged on the quadrilateral pontoon, and the four aft columns are evenly distributed symmetrically around the center of the quadrilateral pontoon. The mooring assembly is located at the bow of the pentagonal barge. The mooring assembly includes a single-point buoy, an internal slip ring turret, and a mooring anchor chain unit. The upper end of the single-point buoy is fixedly connected to the triangular buoy box. The internal slip ring turret is nested inside the single-point buoy and rotatably connected. The lower end of the internal slip ring turret is fixedly connected to the mooring anchor chain unit. The lower end of the mooring anchor chain unit is fixedly connected to the seabed. The power generation and vibration reduction coupling assembly includes a float, a generator, and a first throttle valve. The float is movably connected to the inner wall of the moon pool, the input shaft of the generator is drivenly connected to the float, and the first throttle valve is installed in the current output circuit of the generator.

2. The floating vertical axis wind power platform with single-point mooring using an internal turret as described in claim 1, characterized in that, It also includes a drive assembly, which includes a sliding track and a drive component. The lower end of the rear column is slidably mounted on the sliding track. The fixed end of the drive component is connected to the quadrilateral float, and the movable end of the drive component is connected to the rear column. The drive component drives the rear column to move radially along the sliding track.

3. The floating vertical axis wind power platform with single-point mooring using an internal turret as described in claim 1, characterized in that, It also includes a ballast assembly, which includes multiple independent ballast water tanks disposed inside the triangular pontoon and the quadrilateral pontoon, and a connecting pipeline connecting each ballast water tank to the center of the slip ring turret inside the tank.

4. The floating vertical axis wind power platform with single-point mooring using an internal turret as described in claim 1, characterized in that, The power generation vibration reduction coupling assembly also includes a motion sensor and a first controller; the motion sensor is fixed on the triangular pontoon, the quadrilateral pontoon, the bow column, or the rear column; the first controller is electrically connected to the motion sensor and the first throttle valve respectively.

5. The floating vertical axis wind power platform with single-point mooring using an internal turret as described in claim 1, characterized in that, A conical buoy cavity is provided at the connection between the single-point buoy and the triangular buoy box. The conical buoy cavity is a hollow conical channel that penetrates the top and bottom surfaces of the bow of the pentagonal barge. The outer wall of the single-point buoy and the inner wall of the conical buoy cavity form a nested rigid contact connection.

6. The floating vertical axis wind power platform with single-point mooring using an internal turret as described in claim 1, characterized in that, The internal slip ring turret includes a slewing bearing, an electric slip ring, and a chain disc; the outer ring of the slewing bearing is fixedly connected to the inner wall of the single-point float, and the inner ring of the slewing bearing is fixedly connected to the chain disc; the stationary part of the electric slip ring is fixed to the single-point float, and the rotating part of the electric slip ring is fixed to the chain disc; the upper end of the mooring anchor chain unit is fixedly connected to the chain disc.

7. The floating vertical axis wind power platform with single-point mooring using an internal turret as described in claim 1, characterized in that, It also includes a damping and vibration reduction assembly, which is disposed between the bow column and the triangular pontoon or the rear column and the quadrilateral pontoon.

8. The floating vertical axis wind power platform with single-point mooring using an internal turret as described in claim 7, characterized in that, The damping and vibration reduction assembly includes an inner ring, an outer ring, and a viscoelastic damping material layer; the upper end face of the inner ring is fixedly connected to the lower end face of the column, the viscoelastic damping material layer is filled between the lower end face of the inner ring and the upper end face of the outer ring, the lower end face of the outer ring is connected to the upper surface of the triangular pontoon or the quadrilateral pontoon, and the inner ring and the outer ring are coaxially sleeved and have a clearance fit.

9. The floating vertical axis wind power platform with single-point mooring using an internal turret as described in claim 2, characterized in that, The lower end of the rear column is provided with a slider that matches the sliding track.

10. The floating vertical axis wind power platform with single-point mooring using an inner turret as described in claim 3, characterized in that, Each of the ballast water tanks has an outlet at its bottom. One end of the connecting pipe is sealed to the outlet, and the other end of the connecting pipe is sealed and connected to the center interface of the slip ring turret inside the tank.

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