Semi-submersible composite anti-rolling support platform for arranging offshore wind power system

Abstract

This invention discloses a semi-submersible composite anti-sway support platform for arranging offshore wind power generation systems, belonging to the field of offshore wind power equipment design and manufacturing technology. It provides a semi-submersible composite anti-sway support platform capable of actively intervening based on monitored real-time sway amplitude to effectively reduce the sway amplitude. The semi-submersible composite anti-sway support platform includes a wind turbine generator, a mooring system, a support connecting frame, a heave support stabilization system, and a composite anti-sway stabilization device. The heave support stabilization system is arranged below the support connecting frame via the composite anti-sway stabilization device. The wind turbine generator is arranged on the support connecting frame. The upper end of the mooring system is fixedly connected to the heave support stabilization system, and the lower end is fixedly anchored to a corresponding position on the seabed. The semi-submersible composite anti-sway support platform monitors the real-time sway condition through the composite anti-sway stabilization device, and adjusts and reduces the sway amplitude of the offshore wind power generation system in coordination with the composite anti-sway stabilization device and the heave support stabilization system.

Description

Technical Field

[0001] This invention relates to a semi-submersible composite anti-roll support platform, and more particularly to a semi-submersible composite anti-roll support platform for arranging offshore wind power generation systems, belonging to the field of offshore wind power equipment design and manufacturing technology. Background Technology

[0002] Developing offshore wind power is a key pillar of my country's marine economic strategy and an important measure to address the conventional energy crisis and develop new energy sources. The nearshore and deep-sea areas are rich in wind energy resources and will be the main battleground for my country's future offshore wind power development. As the water depth of the development area increases, the advantages of fixed wind power foundations are no longer there, and floating wind power foundations have become the inevitable choice for deep-water areas.

[0003] In the field of offshore wind power development, semi-submersible wind turbine platforms have gradually become an important type of equipment for deep-sea wind power development due to their advantages such as wide adaptability to water depths and flexible deployment. However, the complex and changeable marine environment, with continuous loads from waves and currents, causes the platform to sway. This swaying not only affects the normal operation of the wind turbine generators and reduces power generation efficiency, but also threatens the structural safety of the platform, exacerbates equipment fatigue damage, and shortens the service life of the platform and generators. At the same time, large swaying under extreme sea conditions may even lead to turbine shutdown and equipment damage, increasing the difficulty and cost of operation and maintenance, and hindering the efficient and stable development of deep-sea wind power.

[0004] Currently, there are some technical means to reduce the sway of semi-submersible wind power platforms, such as passive methods such as optimizing the shape of the main structure of the platform and increasing ballast to adjust the center of gravity. However, passive sway reduction is limited by structural design and has limited effect under complex and variable sea conditions, making it difficult to meet the requirements of efficient and stable power generation. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a semi-submersible composite anti-sway support platform for arranging offshore wind power generation systems, which can actively intervene based on the monitored real-time sway amplitude to effectively reduce the sway amplitude.

[0006] The technical solution adopted to solve the above-mentioned technical problems is: a semi-submersible composite anti-sway support platform for arranging offshore wind power generation systems, including wind turbine generators and mooring systems. The semi-submersible composite anti-sway support platform also includes a support connecting frame, a heave support stabilization system, and a composite anti-sway stabilization device. The heave support stabilization system is arranged below the support connecting frame through the composite anti-sway stabilization device. The wind turbine generators are vertically arranged on the support connecting frame through the lower end of their towers. The upper end of the mooring system is fixedly connected to the heave support stabilization system, and the lower end of the mooring system is fixedly anchored to the seabed at a corresponding position. During the operation of the offshore wind power generation system, the semi-submersible composite anti-sway support platform monitors its real-time swaying status through the composite anti-sway stabilization device, and adjusts and reduces the swaying amplitude of the offshore wind power generation system in cooperation with the composite anti-sway stabilization device and the heave support stabilization system.

[0007] Furthermore, the support frame includes at least one main column, two side columns, three horizontal braces, and three sets of diagonal bracing components. The main column and two side columns are connected by three horizontal braces to form a complete support base. The lower end of the tower is vertically arranged on the top of the main column. The upper end of the composite anti-sway stabilization device is connected to one main column and two side columns of the support base respectively. The lower end of the composite anti-sway stabilization system is connected to the heave support stabilization system. The support base is connected to the heave support stabilization system through its one main column and two side columns with the cooperation of each set of diagonal bracing components.

[0008] The preferred embodiment of the above scheme is that the heave support and stabilization system includes three heave plates, three heave columns, three sets of lower buoys, and three sets of depth adjustment components. The three heave columns are connected as a whole to the main column and each side column through the three sets of lower buoys, respectively, in a position adapted to the location. The three heave plates are arranged below each heave column with adjustable heave depth through the three sets of depth adjustment components. The heave columns are connected as a whole to the main column and the corresponding side column with adjustable heave depth through a composite anti-roll stabilization device. Each set of lower buoys is movably connected to the main column and the corresponding side column through its middle part with the cooperation of the corresponding diagonal bracing components. The upper end of the mooring system is fixedly connected to the corresponding heave plates. During the operation of the offshore wind power generation system, the semi-submersible composite anti-roll support platform can reduce the amplitude of its sway by adjusting the heave depth of the heave plates through each set of depth adjustment components.

[0009] Furthermore, each set of vertical depth adjustment components includes at least three three-section telescopic rods, and each sway plate is arranged below the corresponding sway column with adjustable sway depth through the three-section telescopic rods evenly distributed along the plane of the sway plate.

[0010] The preferred embodiment of the above scheme is that each three-section telescopic rod includes an outer sleeve, a middle sleeve, an inner sleeve, and a sway-damping and stabilizing drive motor. Corresponding guide grooves or slide rails are provided on the corresponding sliding surfaces of the outer, middle, and inner sleeves. The outer, middle, and inner sleeves are sequentially assembled using these corresponding guide grooves and slide rails to form the three-section telescopic rod. The outer sleeve is fixedly mounted at a specified position on the corresponding swaying column with the assistance of the sway-damping and stabilizing drive motor. The free end of the inner sleeve is fixedly connected to a specified position on the corresponding swaying plate. Each swaying plate, with the assistance of the corresponding sway-damping and stabilizing drive motor, adjusts its sway height and tilt angle to increase the stability of the support frame.

[0011] Furthermore, the composite anti-sway stabilization device includes at least a monitoring and control component, a spherical adjustable counterweight component, and a connection and installation adjustment component. The spherical adjustable counterweight component, with the cooperation of the monitoring and control component and the connection and installation adjustment component, is arranged with adjustable sag height between the main column, each side column, and the corresponding sway column. The semi-submersible composite anti-sway support platform reduces its sway amplitude by adjusting the sway height of the spherical adjustable counterweight component through the cooperation of the monitoring and control component and the connection and installation adjustment component.

[0012] The preferred embodiment of the above scheme is that the spherical adjustable counterweight assembly includes three spherical counterweights, each of which is composed of a solid cast steel sphere. The connection and installation adjustment assembly includes three sets of adjustable connection and installation frames. Each spherical counterweight is arranged between the main column, each side column and the corresponding sway column with adjustable sway height through the corresponding adjustable connection and installation frame in cooperation with the monitoring and control assembly.

[0013] Furthermore, each adjustable connecting mounting bracket includes two first connecting rods, two second connecting rods, a set of third connecting rods, and a fourth connecting adjustment bracket. The monitoring and control assembly includes at least three controllers. The lower ends of the two first connecting rods are hinged to the corresponding swaying columns from both sides. The lower ends of the two second connecting rods are hinged to the upper ends of the corresponding first connecting rods. The lower end of the third connecting rod is hinged to the upper ends of the two second connecting rods. The upper end of the third connecting rod is connected to the lower end of the main column or the lower end of the corresponding side column through the fourth connecting adjustment bracket with the cooperation of the controllers. A spherical counterweight is fixed in the middle of the third connecting rod. During the sway height adjustment process, the controller drives the quadrilateral fourth connecting adjustment bracket to extend or shorten its diagonal to determine the sway depth.

[0014] The preferred embodiment of the above scheme is that the composite anti-sway stabilization device also includes a platform buoyancy ballast adjustment mechanism. The lower ends of each adjustable connecting mounting frame are connected to the corresponding swaying column through the platform buoyancy ballast adjustment mechanism. The support connecting frame with excessive sway increases its own weight through the platform buoyancy ballast adjustment mechanism and reduces the sway amplitude with the cooperation of the spherical adjustment counterweight component, the connecting mounting adjustment component and the swaying support stabilization system.

[0015] Furthermore, the platform buoyancy ballast adjustment mechanism includes three platform buoyancy ballast adjustment cylinders and three pumps. Each platform buoyancy ballast adjustment cylinder includes at least three ballast adjustment chambers along the vertical direction. The monitoring and control components also include three buoyancy sensors and three water level sensors. Each platform buoyancy ballast adjustment cylinder is equipped with a corresponding buoyancy sensor. Each ballast adjustment chamber of each platform buoyancy ballast adjustment cylinder is injected with seawater from bottom to top through the corresponding pumps, in conjunction with the corresponding water level sensors and buoyancy sensors, to increase its own weight and adjust the suspension height of the corresponding part of the support connecting frame.

[0016] The beneficial effects of this invention are as follows: The technical solution provided in this application is based on existing wind turbine generator sets and mooring systems. By adding a support connecting frame, a heave support stabilization system, and a composite anti-sway stabilization device, a semi-submersible composite anti-sway support platform is constructed. The heave support stabilization system is arranged below the support connecting frame through the composite anti-sway stabilization device, allowing the wind turbine generator set to be vertically arranged on the support connecting frame through the lower end of its tower. Then, the upper end of the mooring system is fixedly connected to the heave support stabilization system, and the lower end of the mooring system is fixedly anchored to the corresponding position on the seabed. In this way, during the operation of the offshore wind power generation system, the semi-submersible composite anti-sway support platform can monitor its real-time swaying status through the composite anti-sway stabilization device. Then, with the cooperation of the composite anti-sway stabilization device and the heave support stabilization system, the platform can adjust and reduce the swaying amplitude of the offshore wind power generation system, achieving the goal of actively intervening based on the monitored real-time swaying amplitude and effectively reducing the swaying amplitude. The active anti-sway device developed in this application improves the stability of semi-submersible wind power generation platform operation and ensures efficient wind power development by actively intervening in the platform's swaying motion in real time. It also overcomes the shortcomings of existing technologies and promotes the technological upgrading of deep-sea wind power equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the semi-submersible composite anti-roll support platform used for arranging offshore wind power generation systems according to the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of the semi-submersible composite anti-sway support platform for arranging offshore wind power generation systems according to the present invention, which includes a support connection frame, a heave support stabilization system and a composite anti-sway stabilization device.

[0019] Figure 3 for Figure 2 A three-dimensional structural diagram of the composite anti-sway stabilizing device in its deployed state;

[0020] Figure 4 This is a partial schematic diagram of the connection between the support frame and the composite anti-sway stabilization device, and the connection between the composite anti-sway stabilization device and the heave support stabilization system involved in the semi-submersible composite anti-sway support platform for arranging offshore wind power generation systems according to the present invention.

[0021] Figure 5 This is a schematic diagram showing the connection between a platform buoyancy ballast regulating cylinder and a water pump in the semi-submersible composite anti-roll support platform used in the present invention for arranging an offshore wind power generation system.

[0022] Figure 6 This is a schematic diagram showing the arrangement of the three-section telescopic rods and the heaving columns involved in the semi-submersible composite anti-sway support platform for arranging offshore wind power generation systems according to the present invention.

[0023] The components are labeled as follows: 1. Wind turbine generator set; 2. Mooring system; 3. Main column; 4. Side column; 5. Horizontal brace; 6. Diagonal brace assembly; 7. Heave plate; 8. Heave column; 9. Lower float; 10. Outer sleeve; 11. Middle sleeve; 12. Inner sleeve; 13. Spherical counterweight; 14. First connecting rod; 15. Second connecting rod; 16. Third connecting rod; 17. Fourth connecting adjustment frame; 18. Platform buoyancy ballast regulating cylinder; 19. Water pump; 20. Ballast regulating chamber. Detailed Implementation

[0024] like Figures 1-6This invention illustrates a semi-submersible composite anti-sway support platform for deploying offshore wind power systems, capable of actively intervening based on monitored real-time sway amplitude to effectively reduce sway amplitude. The semi-submersible composite anti-sway support platform includes a wind turbine generator 1 and a mooring system 2. It also includes a support connecting frame, a heave support stabilization system, and a composite anti-sway stabilization device. The heave support stabilization system is positioned below the support connecting frame via the composite anti-sway stabilization device. The wind turbine generator 1 is vertically mounted on the support connecting frame via the lower end of its tower. The upper end of the mooring system 2 is fixedly connected to the heave support stabilization system, and the lower end of the mooring system 2 is fixedly anchored to the seabed at a corresponding position. During the operation of the offshore wind power system, the semi-submersible composite anti-sway support platform monitors its real-time sway status through the composite anti-sway stabilization device and, in conjunction with the heave support stabilization system, adjusts and reduces the sway amplitude of the offshore wind power system. The technical solution provided in this application is based on existing wind turbine generators and mooring systems. It constructs a semi-submersible composite anti-sway support platform by adding a support connecting frame, a heave support stabilization system, and a composite anti-sway stabilization device. The heave support stabilization system is arranged below the support connecting frame via the composite anti-sway stabilization device, allowing the wind turbine generator to be vertically mounted on the support connecting frame via the lower end of its tower. The upper end of the mooring system is then fixedly connected to the heave support stabilization system, and the lower end of the mooring system is fixedly anchored to the corresponding position on the seabed. Thus, during the operation of the offshore wind power system, the semi-submersible composite anti-sway support platform can monitor its real-time swaying status through the composite anti-sway stabilization device. With the cooperation of the composite anti-sway stabilization device and the heave support stabilization system, adjustments can be made to reduce the sway amplitude of the offshore wind power system, achieving the goal of actively intervening based on the monitored real-time sway amplitude and effectively reducing the sway amplitude. The active anti-sway device developed in this application improves the stability of semi-submersible wind power platform operations and ensures efficient wind power development by actively monitoring and intervening in the platform's swaying motion in real time. It also overcomes the shortcomings of existing technologies and promotes the technological upgrade of deep-sea wind power equipment. In light of existing technologies, to reduce design and manufacturing costs, the support frame of this application includes at least one main column 3, two side columns 4, three horizontal braces 5, and three sets of diagonal bracing components 6. The main column 3 and two side columns 4 are connected by the three horizontal braces 5 to form a complete support base. The lower end of the tower is vertically arranged on top of the main column 3. The upper end of the composite anti-sway stabilization device is connected to one main column 3 and two side columns 4 of the support base, respectively. The lower end of the composite anti-sway stabilization system is connected to the heave support stabilization system. The support base is reinforced and connected to the heave support stabilization system through its main column 3 and two side columns 4 in cooperation with the sets of diagonal bracing components 6.

[0025] Accordingly, in order to improve the comprehensive intervention capability of the semi-submersible composite anti-roll support platform of this application in terms of real-time sway amplitude and achieve maximum anti-roll function, this application not only adds a composite anti-roll stabilization device, but also improves the existing heave structure. The heave support stabilization system is set as a structure including three heave plates 7, three heave columns 8, three sets of lower floats 9, and three sets of vertical depth adjustment components. The three heave columns 8 are connected as a whole to the main column 3 and each side column 4 through the three sets of lower floats 9 respectively, and the three heave plates 7 are vertically adjusted by the three sets of vertical depth adjustment components. The sway depth is adjustable and arranged below each sway support column 8. The sway support column 8 is connected to the main column 3 and the corresponding side column 4 in an adjustable manner through a composite anti-sway stabilizing device. Each set of lower buoys 9 is movably connected to the main column 3 and the corresponding side column 4 through its middle part with the cooperation of the corresponding diagonal bracing assembly 6. The upper end of the mooring system 2 is fixedly connected to the corresponding sway plate 7. During the operation of the offshore wind power generation system, the semi-submersible composite anti-sway support platform can reduce its sway amplitude by adjusting the sway depth of the sway plate 7 through each set of sway depth adjustment components. For easy adjustment, each set of sway depth adjustment components in this application includes at least three three-section telescopic rods. Each sway plate 7 is arranged below the corresponding sway support column 8 with adjustable sway depth through three-section telescopic rods evenly distributed along the plane of the sway plate. More specifically, each of the three-section telescopic rods in this application includes a set of outer sleeves 10, a set of intermediate sleeves 11, a set of inner sleeves 12, and a sway-damping and stabilizing drive motor. Corresponding guide grooves or slide rails are provided on the corresponding sliding surfaces of the outer sleeves 10, intermediate sleeves 11, and inner sleeves 12. The outer sleeves 10, intermediate sleeves 11, and inner sleeves 12 are sequentially assembled into a three-section telescopic rod through the corresponding guide grooves and slide rails. The outer sleeves 10 are fixedly mounted at the designated positions of the corresponding swaying columns 8 with the assistance of the sway-damping and stabilizing drive motors. The free end of the inner sleeves 12 is fixedly connected to the designated positions of the corresponding swaying plates 7. Each swaying plate 7, through the corresponding sets of sleeves of the three-section telescopic rod with the assistance of the corresponding sway-damping and stabilizing drive motors, adjusts its sway height and tilt angle to increase the stability of the support frame.

[0026] Furthermore, as the most important component of this application's improvement, in order to maximize the sway reduction objective, the composite sway reduction and stabilization device of this application includes at least a monitoring and control component, a spherical adjustable counterweight component, and a connection and installation adjustment component. The spherical adjustable counterweight component, with its sag height adjustable through the connection and installation adjustment component in cooperation with the monitoring and control component, is arranged between the main column 3, each side column 4, and the corresponding swaying column 8. The semi-submersible composite sway reduction support platform reduces its sway amplitude by adjusting the sway height of the spherical adjustable counterweight component through the cooperation of the monitoring and control component and the connection and installation adjustment component. Specifically, the spherical adjustable counterweight assembly of this application includes three spherical counterweights 13, each of which is composed of a solid cast steel sphere. The connection and installation adjustment assembly includes three sets of adjustable connection mounting brackets. Each spherical counterweight 13, with the cooperation of the monitoring and control assembly, is arranged with adjustable sway height between the main column 3, each side column 4, and the corresponding sway column 8 through the corresponding adjustable connection mounting brackets. Each set of adjustable connection mounting brackets includes two first connecting rods 14, two second connecting rods 15, a set of third connecting rods 16, and a fourth connection adjustment bracket 17. The monitoring and control assembly... It includes at least three controllers. The lower ends of the two first connecting rods 14 are hinged to the corresponding swaying columns 8 from both sides. The lower ends of the two second connecting rods 15 are hinged to the upper ends of the corresponding first connecting rods 14. The lower end of the third connecting rod 16 is hinged to the upper ends of the two second connecting rods 15. The upper end of the third connecting rod 16 is connected to the lower end of the main column 3 or the lower end of the corresponding side column 4 through the fourth connecting adjustment frame 17 with the cooperation of the controller. The spherical counterweight 13 is fixed in the middle of the third connecting rod 16. During the swaying height adjustment, the controller drives the quadrilateral fourth connecting adjustment frame 17 to extend or shorten the diagonal to determine the swaying depth. At this time, the composite anti-sway stabilization device of this application also includes a platform buoyancy ballast adjustment mechanism. The lower ends of each adjustable connecting mounting frame are connected to the corresponding swaying column 8 through the platform buoyancy ballast adjustment mechanism. The support connecting frame with excessive sway increases its own weight through the platform buoyancy ballast adjustment mechanism and reduces the sway amplitude with the cooperation of the spherical adjustment counterweight component, the connecting mounting adjustment component and the swaying support stabilization system. More specifically, the platform buoyancy ballast adjustment mechanism includes three platform buoyancy ballast adjustment cylinders 18 and three pumps 19. Each platform buoyancy ballast adjustment cylinder 18 includes at least three ballast adjustment chambers 20 along the vertical direction. The monitoring and control components also include three buoyancy sensors and three water level sensors. A buoyancy sensor is installed on each platform buoyancy ballast adjustment cylinder 18. Each ballast adjustment chamber 20 of each platform buoyancy ballast adjustment cylinder 18 is injected with seawater from bottom to top through the corresponding pumps 19, in conjunction with the corresponding water level sensors and buoyancy sensors, to increase its own weight and adjust the suspension height of the corresponding part of the support connecting frame.

[0027] In summary, the technical solution provided in this application also has the following advantages:

[0028] 1) The semi-submersible platform foundation adopts heave columns and heave plates are installed below the heave columns. Since the semi-submersible platform is taller and has a higher center of gravity than other marine engineering equipment, the circular heave plates and heave columns can better suppress the pitching effect and effectively suppress the heave response of the floating platform, thereby greatly increasing the overall stability of the semi-submersible platform. This can not only extend the service life of the floating wind turbine, but also reduce the alternating load on the mooring system, extend its service life, and reduce operation and maintenance costs.

[0029] 2) When the semi-submersible wind power platform is towed, the heave plate damper can be retracted by a three-section telescopic rod, which can effectively reduce towing resistance and fatigue damage to the heave plate and its connecting components, thereby reducing maintenance and fuel costs.

[0030] 3) The semi-submersible wind power platform monitors the tilt angle of the semi-submersible foundation and the height of the platform's buoyancy ballast regulating cylinder and spherical counterweight in real time, and makes corresponding adjustments in a timely manner based on the monitoring results. This causes the platform's buoyancy ballast regulating cylinder and spherical counterweight to move upward on the downward tilting part of the semi-submersible foundation, while the platform's buoyancy ballast regulating cylinder and spherical counterweight to move downward on the upward tilting part of the semi-submersible foundation. Furthermore, through the water level sensor of the platform's buoyancy ballast regulating cylinder, the ballast tanks of the regulating cylinder with ballast water are kept full of water. This generates a restoring torque that counteracts the average overturning moment currently experienced by the semi-submersible wind power platform, ensuring that the semi-submersible wind power platform always remains within the optimal lateral / longitudinal tilt angle range for wind turbine operation under different wind directions and speeds, which helps to optimize the platform's power generation efficiency.

[0031] 4) The ballast regulating cylinders of the main column and side column of the semi-submersible wind power generation platform can adjust the ballast water volume of the regulating cylinder ballast tank through the water inlet through the water injection pipe, thereby adjusting the draft of the semi-submersible wind power generation platform. It is applicable to wind turbines of different weights and different sea areas.

[0032] 5) Even when the semi-submersible wind power platform’s buoyancy ballast regulating cylinder and spherical counterweight are lowered to their lowest points, the tilt angle of the semi-submersible wind power platform detected by the buoyancy sensor is still too large. By adding ballast water to the four-layer regulating cylinder ballast tank of the platform’s buoyancy ballast regulating cylinder through a water pump, the greater weight and inertia can resist this change in motion and reduce the amplitude of heave.

[0033] The technical solution of this application will be further described below through specific embodiments:

[0034] A semi-submersible wind power generation platform and its active anti-roll device are provided. The device can improve stability, motion performance and sea condition adaptability. At the same time, the device has a simple structure and can ensure high power generation efficiency.

[0035] The technical solution is as follows: a semi-submersible offshore wind power generation platform, the semi-submersible wind power generation platform includes: a semi-submersible foundation, a mooring system and a wind turbine, the semi-submersible foundation includes two side columns, one main column, three sway columns, three cross bracing components and six diagonal bracing components.

[0036] The swaying columns are located below the main column and the two side columns and are fixedly connected to them. The main column is divided into an upper column and a lower column in the vertical direction. It adopts a hollow thin-walled tubular structure to form an independent sealed space. The main column and the two side columns are connected to the horizontal bracing assembly, the diagonal bracing assembly and the lower float respectively.

[0037] A wind turbine generator set, comprising a tower, nacelle, blades and hub, is mounted on the main column.

[0038] The mooring system includes three mooring cables, all of which are R4S grade unstoppable anchor chains. One end of each mooring cable is fixed to the edge of the heave post, and the other end is fixed to the seabed.

[0039] The lower sections of the main column and the two side columns are each equipped with a spherical counterweight-ballast adjustment composite active anti-sway device. This device includes two first connecting rods, two second connecting rods, a platform buoyancy ballast adjustment cylinder, a third connecting rod, a fourth connecting rod assembly, a spherical counterweight, a buoyancy sensor, a water level sensor, and a controller. The spherical counterweight is a solid sphere made of cast steel, galvanized for rust prevention. It connects to the fourth connecting rod assembly at the top and to the third connecting rod at the bottom, and is connected to the platform buoyancy ballast adjustment cylinder. The platform buoyancy ballast adjustment cylinder is internally divided into four layers of ballast tanks, each with a water injection pipe and a water level sensor. A pump is installed at the top of the platform buoyancy ballast adjustment cylinder, and the pump connects to each ballast tank layer through four water injection pipes. The water level sensor controls the water level in each ballast tank layer. The valve on the upper water injection pipe is only opened when the lower ballast tank layer is full of water. The platform's buoyancy ballast regulating cylinder is connected to a third connecting rod via two first connecting rods and two second connecting rods. A buoyancy sensor is installed on the platform's buoyancy ballast regulating cylinder.

[0040] The three-section telescopic rod comprises an outer sleeve, a middle sleeve, and an inner sleeve. The outer sleeve, located at the outermost fixed end, has a mounting base at its bottom that is fixedly connected to the bottom of the swaying column. Its inner wall is machined with guide grooves or guide rails to constrain the movement trajectory of the middle sleeve. The middle sleeve is nested between the outer and inner sleeves. A wear-resistant guide sleeve is installed at the contact point between the outer wall and the inner wall of the outer sleeve, and the inner wall also has a guide structure. The inner sleeve, located at the innermost movable end, has its top end, the telescopic end, fixedly connected to the swaying plate. Its outer wall mates with the guide sleeve on the inner wall of the middle sleeve to ensure coaxiality during telescopic movement.

[0041] The buoyancy sensor is installed on the semi-submersible foundation to obtain the tilt angle of the semi-submersible foundation. The controller is electrically connected to the fourth connecting component, the platform buoyancy ballast regulating cylinder and the buoyancy sensor.

[0042] The sway plate is made of high-strength corrosion-resistant steel into a circular thin plate (0.4m) and has several small holes with an opening rate of 10%.

[0043] Example 1

[0044] To make the technical problems, technical solutions and beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0045] The following is a reference to the appendix. Figure 1 To be continued Figure 5 This invention describes a semi-submersible wind power generation platform and its active anti-sway device.

[0046] like Figure 1 As shown in this example, a semi-submersible wind power generation platform includes a main column, two side columns, three sway columns, three lower buoys, three cross bracing assemblies, and six diagonal bracing assemblies. The sway columns are located below the main column and side columns. The lower buoys are fixedly connected between every two sway columns. The main column and the two side columns are horizontally fixedly connected at the top by cross bracing assemblies. One end of the diagonal bracing assembly is fixedly connected to the sway column, and the other end is fixedly connected to the middle position of the cross bracing assembly. The wind turbine generator, including the tower, nacelle, blades, and hub, is installed on the top of the main column.

[0047] The main column adopts a design that separates the upper and lower columns along the vertical direction. It adopts a hollow thin-walled tubular structure to form an independent sealed space. The partition plate undertakes the dual functions of pressure isolation and structural reinforcement. The lower column is equipped with a spherical counterweight-ballast adjustment composite active anti-sway device to realize the composite functions of structural support and dynamic stability control.

[0048] The heave plate damper comprises four three-section telescopic rods, a heave plate, and a motor. The heave plate is fixedly connected to the bottom of the heave column via the four three-section telescopic rods. The motor is located at the connection between the three-section telescopic rods and the heave column, and is used to drive the extension and retraction of the three-section telescopic rods. In towing mode, the three-section telescopic rods, driven by the motor, shorten the middle and inner sleeves, retracting the heave plate and effectively reducing towing resistance and fatigue damage to the heave plate and its connecting components. In operation mode, the motor reverses to control the extension of the three-section telescopic rods, hydraulically driving the inner sleeve to disengage from the middle sleeve. Simultaneously, the inner sleeve drives the middle sleeve to disengage from the outer sleeve, completing the extension of the heave plate. Mechanical limit blocks are provided at the top of the outer sleeve and the bottom of the inner sleeve to prevent excessive extension and retraction of the sleeves. In operation, the heave plate of the heave plate damper can limit the maximum descent distance of the platform stabilizing ballast regulating cylinder of the spherical counterweight-ballast regulating composite active anti-sway device, and provide support for the platform stabilizing ballast regulating cylinder, effectively improving the service life of the spherical counterweight-ballast regulating composite active anti-sway device.

[0049] The mooring system consists of three mooring cables, all of which are R4S grade unstoppable anchor chains, with one end fixed to a heave post and the other end fixed to the seabed by an anchoring foundation.

[0050] The spherical counterweight-ballast adjustment composite active anti-sway device includes a platform buoyancy ballast adjustment cylinder, two first connecting rods, two second connecting rods, a third connecting rod, a spherical counterweight block, and a fourth connecting rod assembly. When the platform tilts due to wind and waves in the external environment, the buoyancy sensor can promptly acquire the tilt angle of the semi-submersible wind power platform foundation and send it to the controller. The controller determines the specific load adjustment mode of each platform buoyancy ballast adjustment cylinder and spherical counterweight block based on the tilt angle of the semi-submersible wind power platform foundation and the liquid level height of each platform buoyancy ballast adjustment cylinder. The platform buoyancy ballast adjustment cylinder is divided into four layers of adjustment cylinder ballast chambers, each layer with a water inlet and a water level sensor. A water pump is installed at the top of the platform buoyancy ballast adjustment cylinder, and the water pump is connected to the platform through four water inlet pipes. The water level in each ballast tank of the regulating cylinder is controlled by a water level sensor. The valve of the water inlet pipe of the upper regulating cylinder ballast tank is only opened when the lower regulating cylinder ballast tank is full of water. This ensures that the ballast water in the regulating cylinder ballast tank is evenly distributed within the tank. Even distribution of ballast water in the tank lowers the center of gravity, eliminates the free surface effect, and significantly improves the initial stability. The ballast water volume in the four regulating cylinder ballast tanks can be adjusted through the water inlet pipes and water inlet holes, thereby adjusting the draft of the semi-submersible wind power generation platform. This system is suitable for wind turbines of different weights and different sea areas. For example, when the main column is relatively high, the fourth connecting rod assembly of the lower section of the main column, driven by electro-hydraulic forces, rapidly lowers the spherical counterweight. As the spherical counterweight descends, it drives the first and second connecting rods, causing the platform's buoyancy ballast regulating cylinder to move downwards. Due to the mass of the ballast water inside the regulating cylinder and the downward movement of the spherical counterweight, the platform's center of gravity is lowered, resulting in a greater restoring torque for its stable equilibrium state. When the platform tilts due to external forces such as wind and waves, the torque formed by the line of action of gravity and the line of action of buoyancy is greater, more effectively resisting tilting and restoring the platform to its equilibrium state. When the platform floats, the water inside the buoyancy ballast regulating cylinder is retained due to gravity, creating a reverse damping force that counteracts wave loads. By dynamically adjusting each column in a timely manner, the offshore wind power platform's motion performance, stability, and sea condition adaptability on the sea surface can be improved, thereby increasing the wind turbine's power generation efficiency.

[0051] The working process of the semi-submersible wind power platform and active roll damping device is as follows: During towing, the shortening of the three-section telescopic rod of the heave plate damper keeps the heave plate close to the bottom of the heave column, reducing resistance during transportation. When the semi-submersible wind power platform is operating on the sea surface, under normal operating conditions, the heave plate damper effectively suppresses the platform's heave motion. For small tilt angles detected by the buoyancy detector, the depth of the heave plate can be adjusted by driving the three-section hydraulic telescopic rod via a motor to maintain optimal damping force. For large tilt angles detected by the buoyancy detector, the heave plate damper activates an emergency lock, fixing the heave plate 4m from the bottom of the heave column to prevent the heave plate from becoming uncontrollable. Furthermore, for large tilt angles detected by the buoyancy detector, the spherical counterweight-ballast adjustment composite active roll damping device of the main column and two side columns can synchronously and independently adjust the position of the platform's buoyancy ballast adjusting cylinder and the spherical counterweight to change the center of gravity. Specifically, when one platform's buoyancy ballast regulating cylinder moves downward to lower the center of gravity of the column, the other platform's buoyancy ballast regulating cylinder can also move upward simultaneously. This allows for timely and dynamic adjustments to each column, effectively suppressing the heave response of the floating platform and greatly increasing the overall stability of the semi-submersible wind power platform. It enables the semi-submersible foundation to quickly adjust to a positive buoyancy attitude, thereby improving the motion performance, stability, and sea condition adaptability of the semi-submersible wind power platform foundation on the sea surface. This not only extends the service life of the floating wind turbine but also reduces the alternating load on the mooring system, extending its service life and reducing operation and maintenance costs.

[0052] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. Semi-submersible composite anti-rolling support platform for arranging an offshore wind power system, comprising a wind power generator set (1) and a mooring system (2), characterized in that: The semi-submersible composite anti-sway support platform also includes a support connecting frame, a heave support stabilization system, and a composite anti-sway stabilization device. The heave support stabilization system is arranged below the support connecting frame through the composite anti-sway stabilization device. The wind turbine generator (1) is vertically arranged on the support connecting frame through the lower end of its tower. The upper end of the mooring system (2) is fixedly connected to the heave support stabilization system, and the lower end of the mooring system (2) is fixedly anchored to the corresponding position on the seabed. During the operation of the offshore wind power generation system, the semi-submersible composite anti-sway support platform monitors its real-time swaying status through the composite anti-sway stabilization device, and adjusts and reduces the swaying amplitude of the offshore wind power generation system in coordination with the composite anti-sway stabilization device and the heave support stabilization system. The support frame includes at least one main column (3), two side columns (4), three horizontal braces (5), and three sets of diagonal bracing components (6). The main column (3) and two side columns (4) are connected by three horizontal braces (5) to form a complete support base frame. The lower end of the tower is vertically arranged on the top of the main column (3). The upper end of the composite anti-sway stabilizing device is connected to one main column (3) and two side columns (4) of the support base frame respectively. The lower end of the composite anti-sway stabilizing device is connected to the heave support stabilization system. The support base frame is movably connected to the heave support stabilization system through its one main column (3) and two side columns (4) with the cooperation of each set of diagonal bracing components (6). The heave support stabilization system includes three heave plates (7), three heave columns (8), three sets of lower floats (9), and three sets of heave depth adjustment components. The three heave columns (8) are connected to the main column (3) and each side column (4) in a unified manner through the three sets of lower floats (9). The three heave plates (7) are arranged below each heave column (8) with adjustable heave depth through the three sets of heave depth adjustment components. The heave columns (8) are connected to the main column (3) and each side column (4) through a composite anti-sway stabilization device. 3) The heave depth of the corresponding side column (4) is adjustable and connected as a whole. Each set of lower buoys (9) is movably connected to the main column (3) and the corresponding side column (4) through its middle part with the cooperation of the corresponding diagonal bracing assembly (6). The upper end of the mooring system (2) is fixedly connected to the corresponding heave plate (7). During the operation of the offshore wind power generation system, the semi-submersible composite anti-roll support platform can reduce the amplitude of its sway by adjusting the heave depth of the heave plate (7) through each set of heave depth adjustment assembly. Each set of vertical depth adjustment components includes at least three three-section telescopic rods. Each heave plate (7) is arranged below the corresponding heave column (8) with adjustable vertical depth through the three-section telescopic rods evenly distributed along the plane of the heave plate. Each three-section telescopic rod includes an outer sleeve (10), an intermediate sleeve (11), an inner sleeve (12), and a sway-reducing and stabilizing drive motor. Each of the corresponding sliding surfaces of the outer sleeve (10), intermediate sleeve (11), and inner sleeve (12) is provided with mutually compatible guide grooves or slide rails. The outer sleeve (10), intermediate sleeve (11), and inner sleeve (12) are sequentially assembled into a three-section telescopic rod by mutually compatible guide grooves and slide rails. The outer sleeve (10) is fixedly installed at the specified position of the corresponding sway column (8) with the cooperation of the sway-reducing and stabilizing drive motor. The free end of the inner sleeve (12) is fixedly connected to the specified position of the corresponding sway plate (7). Each sway plate (7) is adjusted by the sleeves of the corresponding three-section telescopic rod with the cooperation of the corresponding sway-reducing and stabilizing drive motor to increase the stability of the support frame.

2. Semi-submersible composite stabilization platform for arranging an offshore wind power system according to claim 1, characterized in that: The composite anti-sway stabilizing device includes at least a monitoring and control component, a spherical adjustable counterweight component, and a connection and installation adjustment component. The spherical adjustable counterweight component, with the cooperation of the monitoring and control component and the connection and installation adjustment component, is arranged with adjustable sway height between the main column (3), each side column (4), and the corresponding sway column (8). The semi-submersible composite anti-sway support platform adjusts the sway height of the spherical adjustable counterweight component to reduce its sway amplitude through the cooperation of the monitoring and control component and the connection and installation adjustment component.

3. Semi-submersible composite stabilization platform for arranging an offshore wind power system according to claim 2, characterized in that: The spherical adjustable counterweight assembly includes three spherical counterweights (13), each of which is composed of a solid cast steel sphere. The connection and installation adjustment assembly includes three sets of adjustable connection mounting brackets. Each spherical counterweight (13) is arranged with adjustable sway height between the main column (3), each side column (4) and the corresponding sway column (8) through the corresponding adjustable connection mounting brackets in cooperation with the monitoring and control assembly.

4. The semi-submersible composite anti-roll support platform for arranging offshore wind power generation systems according to claim 3, characterized in that: Each adjustable mounting bracket includes two first connecting rods (14), two second connecting rods (15), a set of third connecting rods (16), and a fourth connecting adjustment bracket (17). The monitoring and control assembly includes at least three controllers. The lower ends of the two first connecting rods (14) are hinged to the corresponding swaying columns (8) from both sides. The lower ends of the two second connecting rods (15) are hinged to the upper ends of the corresponding first connecting rods (14). The lower end of the third connecting rod (16) is hinged to the upper ends of the two second connecting rods (15). The upper end of the third connecting rod (16) is connected to the lower end of the main column (3) or the lower end of the corresponding side column (4) through the fourth connecting adjustment bracket (17) with the cooperation of the controller. The spherical counterweight (13) is fixed in the middle of the third connecting rod (16). During the swaying height adjustment process, the controller drives the quadrilateral fourth connecting adjustment bracket (17) to extend or shorten the diagonal to determine the swaying depth.

5. The semi-submersible composite anti-roll support platform for arranging offshore wind power generation systems according to any one of claims 1 to 4, characterized in that: The composite anti-sway stabilization device also includes a platform buoyancy ballast adjustment mechanism. The lower ends of each adjustable connecting mounting frame are connected to the corresponding swaying column (8) through the platform buoyancy ballast adjustment mechanism. The support connecting frame with excessive sway increases its own weight through the platform buoyancy ballast adjustment mechanism and reduces the sway amplitude with the cooperation of the spherical adjustment counterweight component, the connecting mounting adjustment component and the swaying support stabilization system.

6. The semi-submersible composite anti-roll support platform for arranging offshore wind power generation systems according to claim 5, characterized in that: The platform buoyancy ballast adjustment mechanism includes three platform buoyancy ballast adjustment cylinders (18) and three pumps (19). Each platform buoyancy ballast adjustment cylinder (18) includes at least three ballast adjustment chambers (20) in the vertical direction. The monitoring and control components also include three buoyancy sensors and three water level sensors. A buoyancy sensor is installed on each platform buoyancy ballast adjustment cylinder (18). Each ballast adjustment chamber (20) of each platform buoyancy ballast adjustment cylinder (18) is injected with seawater from bottom to top through the corresponding pumps (19) in cooperation with the corresponding water level sensors and buoyancy sensors to increase its own weight and adjust the suspension height of the corresponding part of the support frame.

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