High-stability semi-submersible wind power platform with layered damping effect

Abstract

The invention provides a high-stability semi-submersible wind power platform with a layered damping effect. The high-stability semi-submersible wind power platform comprises a wind turbine generator, a plurality of buoy assemblies, a multi-layer heaving mechanism and an anchor chain. Each buoy assembly comprises an upper buoy, a water surface line buoy and a lower buoy which are sequentially connected from top to bottom. The multi-layer heaving mechanism comprises at least one middle heaving unit and a bottom heaving unit. The buoy assembly is designed in a stepped mode, modular construction is facilitated, and the construction cost is reduced. Meanwhile, the adjacent buoy assemblies are connected through the middle heaving unit to improve the rigidity of the whole structure, the lower buoys at the bottoms of the adjacent buoy assemblies are connected through the bottom heaving plate and the bottom bypass, energy dissipation can be achieved for waves of different frequency bands, and the additional mass of the structure can be increased; and a layered damping system is formed to cooperatively inhibit heaving, rolling and pitching motions. The contradiction between the stability and the economical efficiency of the platform is effectively adjusted, and the construction cost of the platform can be effectively reduced on the premise that the stability of the platform is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind power platforms, and in particular relates to a high-stability semi-submersible wind power platform with a layered damping effect. Background Art

[0002] Rising global energy demand is accelerating the transition to clean, pollution-free energy. Wind energy, an inexhaustible, environmentally friendly renewable energy source, has become a key focus in the global energy sector. The development and utilization of both offshore and offshore wind energy resources has become a key area of ​​research in renewable energy.

[0003] Semi-submersible wind turbine platforms, with their exceptional stability and strong adaptability to deepwater environments, have become a key trend in offshore wind power technology development. However, traditional semi-submersible wind turbine platform designs have limitations. They typically consist of buoys, columns, and heave plates, with the heave plates primarily providing damping and stability to resist wave-induced platform movement. To meet the wind and wave resistance and stability requirements of semi-submersible wind turbine platforms, traditional designs often require large heave plates and thick-walled structures. This design not only increases material usage but also significantly increases production, transportation, and construction costs.

[0004] Currently, existing domestic patents and technical solutions focus primarily on improving platform stability and wind and wave resistance, but pay less attention to cost control. Given the rapid development of the offshore wind power industry, cost control plays a crucial role in project feasibility and competitiveness.

[0005] Therefore, how to effectively reduce the construction cost of semi-submersible wind power platforms while ensuring their structural stability and performance has become a key technical problem that needs to be solved urgently, and is also the core driving force for promoting the large-scale commercial application of semi-submersible wind power platforms. Summary of the Invention

[0006] The purpose of the present invention is to provide a high-stability semi-submersible wind power platform with a layered damping effect, which can effectively reduce the construction cost of the platform while ensuring the stability of the platform.

[0007] In order to solve the above technical problems, the present invention provides a high-stability semi-submersible wind power platform with layered damping effect, comprising: a wind turbine generator set, a plurality of buoy assemblies, a multi-layer heave mechanism and an anchor chain;

[0008] Each of the buoy assemblies comprises an upper buoy, a surface line buoy and a lower buoy connected in sequence from top to bottom;

[0009] The multi-layer heave mechanism comprises at least one middle heave unit and one bottom heave unit, the middle heave unit comprises a plurality of middle heave plates, the bottom heave unit comprises a plurality of bottom heave plates and a plurality of bottom bypasses, the two ends of each middle heave plate of the middle heave unit are connected to the side surfaces of two adjacent floating cylinder assemblies respectively, and the bottom heave plates are arranged at the bottom of the lower floating cylinder and correspond to the lower floating cylinder one by one, and two adjacent bottom heave plates are connected by a bottom bypass.

[0010] The wind turbine is arranged on the upper floating cylinder of any floating cylinder assembly, and the anchor chain is used to connect the multi-layer heave mechanism and the seabed.

[0011] Optionally, in the high-stability semi-submersible wind power platform with layered damping effect, the plurality of middle heave plates of each middle heave unit are located on the same horizontal plane and form a closed loop with the floating cylinder assembly.

[0012] Optionally, in the high-stability semi-submersible wind power platform with layered damping effect, the middle heave plates are connected between the waterline floating cylinder, the lower floating cylinder, or the waterline floating cylinder and the lower floating cylinder.

[0013] Optionally, in the high-stability semi-submersible wind power platform with layered damping effect, the projections of the middle heave plates and the bottom bypasses between the same two adjacent floating cylinder assemblies in the vertical direction do not completely overlap.

[0014] Optionally, in the high-stability semi-submersible wind power platform with layered damping effect, the width of the middle heave plate is less than or equal to the width of the bottom bypass.

[0015] Optionally, in the high-stability semi-submersible wind power platform with layered damping effect, the number of the floating cylinder assemblies is three, and the three floating cylinder assemblies are arranged in a triangular shape.

[0016] Optionally, in the high-stability semi-submersible wind power platform with layered damping effect, the bottom bypass is tangentially fixedly connected to the bottom heave plate.

[0017] Optionally, in the high-stability semi-submersible wind power platform with layered damping effect, the middle heave plate is fixedly connected to the lower part of the waterline floating cylinder and the upper part of the lower floating cylinder.

[0018] Optionally, in the high-stability semi-submersible wind power platform with layered damping effect, the upper floating cylinder, the waterline floating cylinder, and the lower floating cylinder in each floating cylinder assembly are coaxially arranged.

[0019] And / or, the wind turbine is coaxially arranged with the corresponding upper floating cylinder.

[0020] Optionally, in the high-stability semi-submersible wind power platform with layered damping effect, the upper floating cylinder, the waterline floating cylinder and the lower floating cylinder in each floating cylinder assembly are sequentially welded;

[0021] And / or, the bottom heave plate and the bottom bypass are welded or integrally formed structures;

[0022] And / or, the middle heave plate is welded with the waterline floating cylinder.

[0023] The present application provides a high-stability semi-submersible wind power platform with layered damping effect, which has the following advantages:

[0024] The stepped design of the floating cylinder assembly helps modular construction, which can effectively reduce construction cost. At the same time, the adjacent floating cylinder assemblies are connected by the middle heave plate to improve the rigidity of the overall structure, and the lower floating cylinders at the bottom of the adjacent floating cylinder assemblies are connected by the bottom heave plate and the bottom bypass, which can dampen and stabilize different frequency bands of waves respectively, forming a layered damping system to cooperatively suppress heave, roll and pitch motion. The present application effectively balances the contradiction between platform stability and construction economy, which can effectively reduce the construction cost of the platform under the premise of ensuring the stability of the platform, and is particularly suitable for wind power projects in deep sea environment. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0026] Figure 1 A structural schematic diagram of a high-stability semi-submersible wind power platform with layered damping effect in one form provided by the embodiments of the present application;

[0027] Figure 2 A structural schematic diagram of a wind turbine provided by the embodiments of the present application;

[0028] Figure 3 A structural schematic diagram of a floating cylinder assembly provided by the embodiments of the present application;

[0029] Figure 4 A structural schematic diagram of a bottom heave plate and a bottom bypass in one form provided by the embodiments of the present application;

[0030] Figure 5 A structural schematic diagram of a floating cylinder assembly and a multi-layer heave mechanism in one form provided by the embodiments of the present application;

[0031] Figure 6 A bottom view of a high-stability semi-submersible wind power platform with layered damping effect provided by an embodiment of the present application;

[0032] Figure 7 A structural schematic diagram of another form of high-stability semi-submersible wind power platform with layered damping effect provided by an embodiment of the present application;

[0033] Figure 8 A structural schematic diagram of another form of pontoon assembly and multi-layer heave mechanism provided by an embodiment of the present application.

[0034] In the above figure:

[0035] 100-wind turbine;

[0036] 210-upper pontoon; 220-waterline pontoon; 230-lower pontoon;

[0037] 310-middle heave plate; 320-bottom heave plate; 330-bottom bypass;

[0038] 400-anchor chain. DETAILED DESCRIPTION

[0039] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0040] The core of the present application is to provide a high-stability semi-submersible wind power platform with layered damping effect, which can effectively reduce the construction cost of the platform under the premise of ensuring the stability of the platform.

[0041] In order to enable those skilled in the art to better understand the technical solutions provided by the present application, the present application will be further described in detail below by combining the accompanying drawings and specific embodiments.

[0042] Specifically, referring to Figures 1-8 The present application provides a high-stability semi-submersible wind power platform with layered damping effect, which comprises a wind turbine 100, a plurality of pontoon assemblies, a multi-layer heave mechanism and an anchor chain 400.

[0043] Each of the pontoon assemblies comprises an upper pontoon 210, a surface line pontoon 220 and a lower pontoon 230 connected in sequence from top to bottom. The upper pontoon 210, the surface line pontoon 220 and the lower pontoon 230 are all hollow structures, which can provide sufficient buoyancy to make the wind turbine 100 float on the water surface, while reducing the overall weight. The pontoon assembly is divided into three parts from top to bottom, and the stepped design helps to modularize the construction, which can effectively reduce the construction cost. By setting the counterweight and adding the weight of the semi-submersible wind power platform, the entire wind power platform is finally realized in the form of semi-submersible structure, in which part of the structure is below the sea level and part of the structure is exposed to the sea surface.

[0044] The multi-layer heave mechanism comprises at least one middle heave unit and one bottom heave unit. The middle heave unit comprises a plurality of middle heave plates 310, and the bottom heave unit comprises a plurality of bottom heave plates 320 and a plurality of bottom bypasses 330. The two ends of each middle heave plate 310 of the middle heave unit are respectively connected to the side surfaces of the adjacent two pontoon assemblies. The bottom heave plates 320 are arranged at the bottom of the lower pontoon 230 and correspond to the lower pontoon 230 one by one. The adjacent two bottom heave plates 320 are connected by one bottom bypass 330.

[0045] When the number of the middle heave units is one, as shown in Figure 1 When the number of the middle heave units is multiple, as shown in Figures 7-8 The multiple middle heave units are arranged along the height direction of the pontoon assembly, which can be arranged at any height from below the waterline of the surface line pontoon 220 to between the lower pontoon 230.

[0046] Specifically, the middle heave plate 310 can be connected to the surface line pontoon 220, the lower pontoon 230 or between the surface line pontoon 220 and the lower pontoon 230 of the adjacent two pontoon assemblies. The multiple middle heave plates 310 of each middle heave unit are located at the same horizontal plane and form a closed loop with the pontoon assemblies.

[0047] The middle heave plate 310 and the bottom heave plate 320 can increase the heave damping and provide sufficient vertical stability. The bottom bypass 330 connects the bottom heave plates 320, which reduces the structural gravity center and increases the heave damping.

[0048] The middle heave plate 310, the bottom heave plate 320 and the bottom bypass 330 can respectively damp and stabilize different frequency bands of waves to form a layered damping system to cooperatively suppress the heave, roll and pitch motions. At the same time, the middle heave plate 310 can improve the rigidity of the overall structure.

[0049] The wind turbine 100 is installed on the upper pontoon 210 of any one of the pontoon assemblies. The anchor chain 400 is used to connect the multi-layer heave mechanism and the seabed, thereby limiting the surge, sway and yaw motions of the semi-submersible wind power platform.

[0050] The present invention provides a highly stable semi-submersible wind power platform with a layered damping effect. The stepped design of the pontoon assembly facilitates modular construction and can effectively reduce construction costs. At the same time, the middle heave plate 310 is used to connect the adjacent pontoon assemblies to the pontoons below the waterline to enhance the rigidity of the overall structure. The bottom heave plate 320 and the bottom bypass 330 are used to connect the lower pontoons 230 at the bottom of the adjacent pontoon assemblies. These can respectively provide damping and stabilization for waves of different frequency bands, forming a layered damping system to collaboratively suppress heave, roll, and pitch motions. The present invention effectively reconciles the contradiction between platform stability and construction economy. While ensuring the stability of the platform, it can effectively reduce the construction cost of the platform. It is particularly suitable for wind power projects in offshore deepwater environments.

[0051] The vertical projections of the middle heave plate 310 and the bottom bypass 330 between two adjacent buoy assemblies may completely overlap, may not overlap, or may partially overlap (i.e., not completely overlap). In particular, in a specific embodiment, the vertical projections of the middle heave plate 310 and the bottom bypass 330 between two adjacent buoy assemblies may not completely overlap, i.e., Figure 1 As shown in the figure, the staggered arrangement of the plates (i.e., the bottom bypass 330 and the middle heave plate 330) can provide damping and stabilization for waves of different wave heights and wave periods. This allows the entire platform to more comprehensively mitigate the impact of waves of different frequency bands in complex wave environments, thereby improving its motion stability.

[0052] Specifically, the width of the central heave plate 310 is smaller than that of the bottom bypass 330, forming a variable-cross-section, multi-layer heave mechanism. By optimizing the cross-sectional dimensions and shapes of the bottom heave plate 320, the bottom bypass 330, and the central heave plate 310, they effectively dissipate wave energy and enhance the platform's heave damping. This creates a coordinated damping and structural strength system, increasing the structural damping area while creating a more effective energy dissipation zone under wave action, further reducing the platform's heave motion amplitude.

[0053] To further enhance the structural stability of the semi-submersible wind turbine platform, three buoy assemblies are arranged in a triangular configuration. Furthermore, the central heave plate 310 is fixedly connected to the lower portion of the waterplane buoy 220 and the upper portion of the lower buoy 230, forming a triangular-shaped structure that provides structural connection strength and rigidity. The lower end of the lower buoy 230 is fixedly connected to the bottom heave plate 320, and the bottom bypass 330 is tangentially fixedly connected to the bottom heave plate 320, forming a triangular-shaped configuration. Figure 4 and Figure 5 shown.

[0054] The floating cylinder layout of the high-stability semi-submersible wind power platform with the layered damping effect is reasonable, the effective cooperation of the waterline floating cylinder 220 and the upper floating cylinder 210 ensures the overall stability of the platform and the balance of the buoyancy distribution, and enhances the ability of the platform to resist wave load. In addition, the modular design concept can significantly reduce the construction and installation cost of the structure and improve the production efficiency.

[0055] In specific embodiments, as shown in Figure 3 The upper floating cylinder 210, the waterline floating cylinder 220 and the lower floating cylinder 230 in each floating cylinder assembly are coaxially arranged. At the same time, the wind power unit 100 is coaxially arranged with the corresponding upper floating cylinder 210. The wind power unit 100 can be coaxially and fixedly connected with any upper floating cylinder 210, the upper end of the waterline floating cylinder 220 is coaxially and fixedly connected with the upper floating cylinder 210, and the lower end of the waterline floating cylinder 220 is coaxially and fixedly connected with the lower floating cylinder 230. Specifically, the sizes of the upper floating cylinder 210 and the lower floating cylinder 230 can be the same, and the diameter of the waterline floating cylinder 220 is slightly larger than that of the upper floating cylinder 210 / lower floating cylinder 230, so as to realize the design of the variable cross-section stepped floating cylinder, which can still provide sufficient buoyancy, waterline area, structural strength and hydrodynamic characteristics after greatly reducing the construction cost, and the consistency design of the upper and lower floating cylinders is particularly suitable for modular production and assembly.

[0056] Of course, the specific sizes of the upper floating cylinder 210, the waterline floating cylinder 220 and the lower floating cylinder 230 can also be adaptively selected according to actual needs, which are not limited herein.

[0057] In addition, a water injection device can be arranged in the lower floating cylinder 230, the internal chamber of the lower floating cylinder 230 is injected or discharged with seawater, so as to change the buoyancy, center of gravity and draft of the platform, and adjust the structural form or dynamic response thereof. Specifically, the water injection device includes a water pump, a water pump pipe and a control valve, the water pump is arranged in the inner cavity of the lower floating cylinder 230, the inlet of the water pump is connected with one end of the water pump pipe, the other end of the water pump pipe penetrates through the lower floating cylinder 230 and communicates with the outside, and the control valve is arranged on the water pump pipe. When the water pump is operated, seawater can be pumped into the internal chamber of the lower floating cylinder 230 through the water pump pipe, when the water pump is closed and the control valve is in the open state, the seawater inside the lower floating cylinder 230 can be discharged, and the water amount in the lower floating cylinder 230 can be controlled through the cooperation of the water pump, the water pump pipe and the control valve, so as to control the buoyancy of the lower floating cylinder 230 and make the lower floating cylinder 230 submerged in seawater.

[0058] In specific embodiments, in order to improve the connection strength, the connection of the main components of the high-stability semi-submersible wind power platform with the layered damping effect is in the form of welding, and the upper floating cylinder 210, the waterline floating cylinder 220 and the lower floating cylinder 230 in each floating cylinder assembly are sequentially welded. The bottom heave plate 320 and the bottom bypass 330 are welded or integrally formed. The middle heave plate 310 is welded with the waterline floating cylinder 220.

[0059] Further, one end of the anchor chain 400 is fixedly connected with the bottom of the bottom heave plate 320, and the other end of the anchor chain 400 is fixedly connected with the seabed through a seabed anchor, so as to provide mooring stiffness to limit the surge, sway displacement of the platform and suppress the yaw movement of the platform. The fixed connection of the anchor chain 400 with the bottom heave plate 320 includes but is not limited to a universal joint, an in-line tensioner, an ear plate and the like. A plurality of anchor chains 400 are connected to each bottom heave plate 320 and are arranged in a circumferential manner on the bottom heave plate 320, as shown in the figure. Specifically, the number of anchor chains 400 can be adjusted according to the specific sea conditions, and the example of three anchor chains is only used for illustration. Figure 6

[0060] Compared with the traditional single-layer heave plate and fixed-section column, the multi-layer heave plate and variable-section column structure provided by the application can effectively adapt to complex marine environments, significantly improve the motion performance of the platform, reduce the load of the wind turbine, improve the operation safety and service life, and is particularly suitable for wind power development projects in deep-sea environments.

[0061] Therefore, the high-stability semi-submersible wind power platform with layered damping effect provided by the application fundamentally solves the contradiction between the stability and cost of the traditional platform, has outstanding technical progress and economic advantages.

[0062] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right and the like, is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation on the present application.

[0063] In the description of the present application, the meaning of multiple is more than two, and if the first and the second are described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0064] As shown in the present application and the claims, unless the context clearly indicates otherwise, the words “one”, “a”, “an” and / or “the” do not refer to the singular, but also include the plural. Generally, the terms “include” and “contain” only indicate the inclusion of the steps and elements clearly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements. The element defined by the statement “including a…” does not exclude the presence of another identical element in the process, method, product or device including the element.

[0065] ​In the description of the embodiments of the present application, unless otherwise specified, the words "set", "install", "connect" and the like shall be understood as broad meaning, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0066] In the description of the present application, unless otherwise expressly limited, the words such as setting, installing, connecting and the like shall be understood as broad meaning, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0067] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the various embodiments can be mutually referred to.

[0068] The principles and implementation modes of the present application are described by applying specific examples herein. The above description of the embodiments is only for the purpose of helping to understand the method of the present application and its core idea. It should be pointed out that, for the person skilled in the art, without departing from the principles of the present application, some improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A high-stability semi-submersible wind power platform with layered damping effect, characterized in that, The wind turbine (100), a plurality of pontoon assemblies, a multi-layer heave mechanism and an anchor chain (400) are included. Each of the pontoon assemblies includes an upper pontoon (210), a waterline pontoon (220) and a lower pontoon (230) connected in sequence from top to bottom. The multi-layer heave mechanism includes at least one middle heave unit and one bottom heave unit, the middle heave unit includes a plurality of middle heave plates (310), the bottom heave unit includes a plurality of bottom heave plates (320) and a plurality of bottom by-passes (330), the middle heave plates (310) of each of the middle heave units are connected to the side faces of the adjacent two pontoon assemblies at both ends, the bottom heave plates (320) are arranged at the bottom of the lower pontoon (230) and correspond to the lower pontoon (230) one by one, and the adjacent two bottom heave plates (320) are connected by one bottom by-pass (330). The wind turbine (100) is installed on the upper pontoon (210) of any one of the pontoon assemblies, and the anchor chain (400) is used to connect the multi-layer heave mechanism and the seabed. The plurality of middle heave plates (310) of each of the middle heave units are located in the same horizontal plane and form a closed loop with the pontoon assemblies.

2. The high-stability semi-submersible wind power platform with layered damping effect according to claim 1, characterized in that, The middle heave plates (310) are connected between the waterline pontoons (220), the lower pontoons (230), or the waterline pontoons (220) and the lower pontoons (230).

3. The high-stability semi-submersible wind power platform with layered damping effect according to claim 2, characterized in that, The projections of the middle heave plates (310) and the bottom by-passes (330) between the same adjacent two pontoon assemblies in the vertical direction do not completely coincide.

4. The high-stability semi-submersible wind power platform with layered damping effect according to claim 1, characterized in that, The width of the middle heave plates (310) is less than or equal to the width of the bottom by-passes (330).

5. The high-stability semi-submersible wind power platform with layered damping effect according to claim 4, characterized in that, The number of the pontoon assemblies is three, and the three pontoon assemblies are arranged in a triangular shape.

6. The high-stability semi-submersible wind power platform with layered damping effect according to claim 1, characterized in that, The bottom by-passes (330) are tangentially fixed to the bottom heave plates (320).

7. The high-stability semi-submersible wind platform with layered damping effect according to claim 6, characterized in that, The middle heave plates (310) are simultaneously fixed to the lower part of the waterline pontoons (220) and the upper part of the lower pontoons (230).

8. The high-stability semi-submersible wind power platform with layered damping effect according to claim 1, characterized in that, The upper pontoons (210), the waterline pontoons (220) and the lower pontoons (230) in each of the pontoon assemblies are coaxially arranged; 9. The high-stability semi-submersible wind power platform with layered damping effect according to claim 1, characterized in that, And / or, the wind turbine (100) and the corresponding upper pontoon (210) are coaxially arranged. The upper pontoons (210), the waterline pontoons (220) and the lower pontoons (230) in each of the pontoon assemblies are sequentially welded; 10. The high-stability semi-submersible wind power platform with layered damping effect according to claim 1, characterized in that: And / or, the bottom heave plates (320) and the bottom by-passes (330) are welded or integrally formed; And / or, the middle heave plates (310) are welded to the waterline pontoons (220). ​

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