Sea condition self-adaptive convertible structure floating type wind power platform

Abstract

According to the sea condition self-adaption convertible structure floating type wind power platform, the wind turbine generator is supported through the center buoy of the semi-submersible floating type platform, and meanwhile the semi-submersible floating type platform is anchored to the seabed through the mooring system. The peripheral buoys are distributed around the central buoy, are hinged to the central buoy through the main supporting beams and the auxiliary supporting beams, cooperatively work with the central buoy and jointly bear the buoyancy of the whole wind turbine generator system, and can ballast seawater to the peripheral buoys when sea condition self-adaption conversion is needed, and the seawater can flow into the peripheral buoys along with the increase of the seawater. The gravity center of the whole floating type wind power platform is lowered, the stability is enhanced, and therefore the platform can adapt to more severe sea conditions. Meanwhile, the main supporting beams and the auxiliary supporting beams are driven by the floating barrels on the periphery to rotate downwards, so that the whole platform structure changes adaptively, the height of the gravity center of the platform is further reduced, the performance of the platform under different sea conditions is optimized, and therefore stable operation of the wind turbine generator in different sea areas and sea condition environments is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind power platforms, and in particular relates to a sea condition-adaptive convertible floating wind power platform. Background Art

[0002] With the growing global demand for renewable energy, offshore wind power, with its abundant wind energy resources and significant advantages such as its lack of land use, has become a key area of ​​energy transition. In its early stages of development, traditional fixed offshore wind turbines were mostly installed in shallow waters, securely anchored to the seabed by pile foundations. However, as offshore wind power development has progressed, development areas have gradually expanded into the deep sea (water depths exceeding 50 meters). Fixed structures are now facing rapidly rising costs and numerous technical bottlenecks. This is where floating wind platforms came into being. These platforms utilize buoyancy for support and are anchored to the seabed via an anchoring system, enabling stable operation even in deep waters. They have become a core technology for deep-sea wind power development.

[0003] Currently, mainstream floating platforms primarily encompass the following four structural types: semi-submersibles, spar platforms, tension-leg platforms (TLPs), and barge platforms. While these traditional platforms have been optimized for specific sea conditions, the complex and volatile nature of the marine environment makes it difficult for a single structural type to fully address diverse application scenarios. For example, semi-submersibles perform well in low to moderate sea conditions, but their stability is significantly lacking in extreme waves. Spar platforms, while capable of handling high sea conditions, exhibit slow dynamic response in low to moderate sea conditions due to their significant heave inertia. Furthermore, existing platforms are fixed in structure and cannot dynamically adjust their configuration based on real-time sea conditions. This limits power generation efficiency and poses the risk of capsizing or overloading in inclement weather.

[0004] In addition, the mechanical matching method also exposes long-term reliability issues. Taking the multifunctional pumped water lifting pile and the semi-submersible platform center mounting barrel as an example, the two adopt a loose-fit design, with a small gap between them to allow lifting and lowering movements. However, under the action of long-term dynamic loads, especially the vibration of the upper wind turbine and the combined effects of thrust in different directions, the mating surfaces will wear due to frequent friction and stress concentration, resulting in a decrease in the positioning accuracy of the lifting pile. Positioning deviations are further transmitted to the hinge point of the hydraulic support arm, causing localized uneven force, accelerating the aging of the hydraulic cylinder seals and deformation of the transmission rod. At the same time, the loose-fit structure is prone to induce lateral shaking under strong wave conditions, exacerbating fatigue damage to mechanical components. This cumulative effect will ultimately lead to reduced system reliability, increased maintenance frequency, and the risk of sudden mechanical failure in high sea conditions.

[0005] Ultimately, these shortcomings stem primarily from the structural rigidity and mechanical design limitations of existing technologies. Fixed semi-submersible platforms, unable to dynamically adjust their buoyancy distribution and center of gravity, suffer from insufficient motion suppression and limited adaptability to sea conditions. Furthermore, the wear and fatigue of loosely fitted mechanical structures under long-term dynamic loads directly threatens system reliability. These two issues, combined, severely restrict the technology's potential for application in complex deep-sea environments.

[0006] Therefore, it is urgent to solve this problem through dynamic transformation of structural form and optimization of coordinated design, so as to promote further development and breakthroughs in offshore wind power floating wind power platform technology to meet the growing demand for deep-sea wind power development. Summary of the Invention

[0007] The purpose of the present invention is to provide a sea-condition-adaptive convertible floating wind power platform, which can improve the adaptability and stability of the platform in different marine environments by dynamically adjusting the structural form.

[0008] In order to solve the above technical problems, the present invention provides a sea-condition adaptive convertible floating wind power platform, comprising: a wind turbine, a semi-submersible floating platform and a mooring system;

[0009] The semi-submersible floating platform comprises a plurality of main support beams, a plurality of secondary support beams, a central buoy and a plurality of surrounding buoys, wherein the plurality of surrounding buoys are arranged circumferentially of the central buoy, the two ends of each main support beam are respectively hinged to the central buoy and the corresponding surrounding buoy, the two ends of each secondary support beam are respectively hinged to the central buoy and the corresponding surrounding buoy, the height of the hinge point between the main support beam and the central buoy is higher than the height of the hinge point between the secondary support beam and the central buoy, and the height of the hinge point between the main support beam and the surrounding buoy is lower than the height of the hinge point between the secondary support beam and the surrounding buoy;

[0010] The wind turbine generator set and the mooring system are respectively provided at the upper and lower ends of the central buoy, and the surrounding buoys are provided with water injection devices;

[0011] The mooring system is used to anchor the semi-submersible floating platform on the seabed.

[0012] Optionally, in the above-mentioned sea condition adaptive convertible structure floating wind power platform, the semi-submersible floating platform and the wind turbine generator set are coaxially arranged.

[0013] Optionally, in the above-mentioned sea condition adaptive convertible structure floating wind power platform, the number of the surrounding buoys is 3-5.

[0014] Optionally, in the above-mentioned sea condition adaptive convertible structure floating wind power platform, the wind turbine group includes a wind turbine and a tower, and the wind turbine is installed on the top of the tower.

[0015] Optionally, in the above-mentioned sea condition adaptive convertible structure floating wind power platform, the water injection device includes a pump, a pumping pipe and a control valve, the pump is arranged in the inner cavity of the surrounding buoys, the inlet of the pump is connected to one end of the pumping pipe, the other end of the pumping pipe passes through the surrounding buoys and is connected to the outside world, and the control valve is provided on the pumping pipe.

[0016] Optionally, in the above-mentioned sea condition adaptive convertible structure floating wind power platform, the water injection device also includes a water level sensor for detecting the water level height inside the surrounding buoys, and the water level sensor is electrically connected or signal-connected to the pump.

[0017] Optionally, in the above-mentioned sea condition adaptive convertible structure floating wind power platform, a first clamp is provided on the central buoy, and each of the surrounding buoys is hingedly connected to the first clamp via a hinge on the upper part of a main support beam;

[0018] And / or, a second clamp is provided on the surrounding buoys, and each of the secondary support beams is hinged to the second clamp via a hinge at the rear end of the secondary support beam.

[0019] Optionally, in the above-mentioned sea condition adaptive convertible structure floating wind power platform, the first clamp is a circular ring, and / or the second clamp is a semi-circular ring.

[0020] Optionally, in the above-mentioned sea condition adaptive convertible structure floating wind power platform, counterweight blocks are provided at the bottom of the surrounding buoys.

[0021] Optionally, in the above-mentioned sea condition adaptive convertible structure floating wind power platform, the mooring system includes a catenary or a cable.

[0022] The present invention provides a sea-condition-adaptive convertible floating wind power platform, which has the following beneficial effects:

[0023] The wind turbine is supported by a central buoy on the semi-submersible floating platform, which is anchored to the seabed by a mooring system. Multiple peripheral buoys are distributed around the central buoy, each articulated to the central buoy via a primary support beam and secondary support beams. These buoys work in conjunction with the central buoy to collectively support the buoyant force of the wind turbine. When sea state adaptation is required, the hollow chambers within the peripheral buoys can be filled with ballast water. As the ballast water in the peripheral buoys increases, the center of gravity of the entire floating wind turbine platform is lowered, enhancing its stability to accommodate even harsher sea conditions. Simultaneously, the main and secondary support beams rotate downward, driven by the peripheral buoys, enabling the entire semi-submersible floating platform to adapt structurally, further lowering the floating wind turbine's center of gravity and optimizing its performance in varying sea conditions. This ensures stable operation of the wind turbine in diverse sea areas and environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0025] Figure 1 A front view of a wind turbine and a semi-submersible floating platform provided in an embodiment of the present invention;

[0026] Figure 2 A schematic structural diagram of a wind turbine generator set and a semi-submersible floating platform provided in an embodiment of the present invention;

[0027] Figure 3-Figure 4 A schematic structural diagram of a sea-condition-adaptive convertible floating wind power platform provided by an embodiment of the present invention;

[0028] Figure 5 A schematic structural diagram of the buoys surrounding the semi-submersible floating platform provided in an embodiment of the present invention in a fully loaded and sunken state.

[0029] In the above picture:

[0030] 100-wind turbine;

[0031] 110-wind turbine; 120-tower;

[0032] 200-semi-submersible floating platform;

[0033] 210 - Main support beam upper hinge; 220 - Main support beam; 230 - Main support beam lower hinge; 240 - Secondary support beam; 250 - Secondary support beam front hinge; 260 - Secondary support beam rear hinge; 270 - Center pontoon; 280 - Surrounding pontoons;

[0034] 300-Mooring system. DETAILED DESCRIPTION

[0035] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0036] The core of the present invention is to provide a sea-condition adaptive convertible floating wind power platform, which improves the adaptability and stability of the platform in different marine environments by dynamically adjusting the structural form.

[0037] In order to enable those skilled in the art to better understand the technical solutions provided by the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Specifically, please refer to Figure 1-Figure 5 The present invention provides a sea-adaptive convertible floating wind turbine platform, comprising a wind turbine 100, a semi-submersible floating platform 200, and a mooring system 300. The semi-submersible floating platform 200 is anchored to the seabed via the mooring system 300, ensuring the stable positioning of the entire wind turbine 100 at sea. The wind turbine 100 and the semi-submersible floating platform 200 are coaxially connected to ensure the overall stability of the wind turbine platform structure.

[0039] The semi-submersible floating platform 200 includes a main support beam upper hinge 210, a main support beam 220, a main support beam lower hinge 230, a secondary support beam 240, a secondary support beam front hinge 250, a secondary support beam rear hinge 260, a central buoy 270, and surrounding buoys 280. There are multiple main support beam upper hinges 210, main support beam 220, main support beam lower hinge 230, secondary support beam 240, secondary support beam front hinge 250, secondary support beam rear hinge 260, and surrounding buoys 280, and they correspond one to one.

[0040] Multiple peripheral buoys 280 are arranged circumferentially around the central buoy 270. The main support beam upper hinge 210, main support beam 220, and main support beam lower hinge 230 serve as the primary support structure. One end of the main support beam 220 is connected to the central buoy 270 via the main support beam upper hinge 210, and the other end of the main support beam 220 is connected to the corresponding peripheral buoy 280 via the main support beam lower hinge 230. This hinged connection allows the main support beam 220 to be adjusted in angle within a certain range, providing a basis for adjusting the height of the wind turbine platform. The secondary support beam 240, the secondary support beam front hinge 250, and the secondary support beam rear hinge 260 serve as auxiliary support structures. Together with the main support structure, central buoy 270, and peripheral buoys 280, they form a stable support framework, enhancing the structural strength of the entire platform. One end of the secondary support beam 240 is connected to the central buoy 270 through the front end hinge 250 of the secondary support beam, and the other end of the secondary support beam 240 is connected to the surrounding buoys 280 through the rear end hinge 260 of the secondary support beam. The height of the upper hinge 210 of the main support beam on the central buoy 270 is higher than the height of the front end hinge 250 of the secondary support beam on the central buoy 270, and the height of the lower hinge 230 of the main support beam on the surrounding buoys 280 is lower than the height of the rear end hinge 260 of the secondary support beam on the surrounding buoys 280.

[0041] The wind turbine 100 and the mooring system 300 are respectively provided at the upper and lower ends of the central buoy 270. The central buoy 270 provides stable support for the wind turbine 100, and the mooring system 300 is used to anchor the semi-submersible floating platform 200 on the seabed.

[0042] The buoys 280 are equipped with a water injection device, which is equivalent to a ballast water tank. Ballast water needs to be pumped into the cavity of the buoys 280 through the water injection device. When the floating wind power platform changes the sea area or the sea conditions change, the platform has a unique sea condition adaptive convertible structure. At this time, the buoys 280 can be Figure 2 In the empty state, ballast seawater is pumped into the cavity of the surrounding buoys 280 through a pumping device (not shown in the figure), changing to Figure 5 The full warehouse sinking state. Figure 5 The transformed configuration of the sea-condition-adaptive convertible floating wind power platform displayed intuitively presents the process of the surrounding buoys 280 changing from an empty state to a full and sinking state, and the main support beam 220 and the secondary support beam 240 rotating downward under the action of the hinges.

[0043] This solution provides a sea-adaptive convertible floating wind turbine platform. The wind turbine 100 is supported by a central buoy 270 of a semi-submersible floating platform 200, while a mooring system 300 anchors the semi-submersible floating platform 200 to the seabed. Multiple peripheral buoys 280 are distributed around the central buoy 270, each articulated to the central buoy 270 via a main support beam 220 and a secondary support beam 240. The peripheral buoys 280 work in conjunction with the central buoy 270 to jointly bear the buoyancy of the entire wind turbine. When sea-adaptive conversion is required, the hollow chambers within the peripheral buoys 280 can be filled with ballast water. As the ballast water in the peripheral buoys 280 increases, the center of gravity of the entire floating wind turbine platform is lowered, enhancing its stability and adapting to increasingly severe sea conditions.

[0044] At the same time, the main support beam 220 rotates downward under the action of the upper hinge 210 and the lower hinge 230 of the main support beam, and the secondary support beam 240 also rotates downward with the cooperation of the front hinge 250 and the rear hinge 260 of the secondary support beam, so that the structure of the entire semi-submersible floating platform undergoes adaptive changes, further reducing the center of gravity height of the floating wind power platform, optimizing its performance under different sea conditions, and thus realizing stable operation of the wind turbine in different sea areas and sea conditions.

[0045] It should be noted that the present invention achieves dynamic conversion of the platform's structural form (switching between semi-submersible and spar types) through ballast water regulation and control. This has the direct technical effect of actively optimizing buoyancy distribution and center of gravity position. In extreme sea conditions, ballast water is injected into the surrounding buoys 280, causing the platform to sink to a deep draft (spar type) and significantly increasing its inertial mass. This shifts the natural period away from the dominant wave frequency, significantly reducing the motion amplitude and thus avoiding uncontrolled motion caused by resonant response. This regulation mechanism directly improves the platform's stability in extreme wave conditions, reduces the risk of wind turbine 100 shutdown due to motion overload, and ultimately achieves the simultaneous optimization of power generation efficiency and safety.

[0046] The platform adapts to varying water depths and marine environments through dynamic structural transformation. In deepwater, the Spar structure suppresses movement by increasing the draft; in shallow or moderate sea conditions, the semi-submersible structure maintains horizontal stability through a low center of gravity design. Compared to the limitations of existing fixed semi-submersible platforms, this invention can cover a wide range of wave heights and adapt to diverse needs, from near-shore sheltered waters to complex deep-sea environments. This adaptability stems from the flexible switching of structural forms, allowing a single platform to replace multiple customized designs, expanding the applicable sea areas for offshore wind power.

[0047] Furthermore, the present invention employs a design strategy in which a central pontoon 270 securely supports the wind turbine 100, while surrounding pontoons 280 are dynamically adjustable. As the primary load-bearing structure, the central pontoon 270 does not participate in any morphological changes; the vertical displacement of the surrounding pontoons 280 is controlled solely by the primary support beams 220 and secondary support beams 240. This design avoids the wear and tear caused by the loose fit between the lifting piles and the platform found in existing technologies, while also reducing fatigue damage to the primary structure caused by dynamic loads.

[0048] The present invention solves the problems of insufficient motion suppression, poor sea condition adaptability and mechanical reliability caused by structural fixity in the prior art through structural dynamic conversion, ballast water control and master-slave separation design, and ultimately achieves the technical effects of enhanced motion suppression capability, expanded adaptability to multiple sea areas and optimized cost throughout the entire life cycle.

[0049] In order to improve the stability of the sea-adaptive convertible floating wind power platform, the semi-submersible floating platform 200 is coaxially arranged with the wind turbine 100. The central buoy 270 is located at the center of the surrounding buoys 280, and the center of the central buoy 270 is a hollow structure. This design not only reduces its own weight, but also provides space for subsequent ballast water operations. This master-slave separation design uses the central buoy 270 as a central column to fix the wind turbine 100, and the surrounding buoys 280 as side columns to independently adjust the buoyancy and displacement. The central buoy 270 is anchored to the seabed through the catenary of the mooring system 300, with a number of 3-5, to ensure the stability and anti-overturning ability of the platform at sea. The semi-submersible floating platform 200 is supported and anchored to the seabed by buoyancy, and can operate stably in deep water areas to support the wind turbine 100 to generate electricity.

[0050] In a specific embodiment, the wind turbine 100 includes a wind turbine 110 and a tower 120, and the wind turbine 110 is installed on the top of the tower 120. Figure 1 and Figure 2 The figure clearly illustrates the interconnectedness of wind turbine 100, semi-submersible floating platform 200, and mooring system 300, as well as their macroscopic layout for offshore applications. Wind turbine 110 is fixedly mounted on a support frame of tower 120, which transmits the mechanical energy generated by wind turbine 110 to the subsequent power generation system. As a key connecting component, tower 120 must not only possess sufficient strength to withstand the various loads of wind turbine 110 in complex offshore environments, but also maintain a stable and reliable connection with semi-submersible floating platform 200 to ensure the normal operation of the entire power generation system.

[0051] Ballast water regulation of the surrounding buoys 280 is to change the buoyancy, center of gravity and draft of the platform by injecting or discharging seawater into the internal compartments of the surrounding buoys 280 to adjust its structural form or dynamic response.

[0052] In a specific embodiment, the water injection device includes a pump, a pumping pipe, and a control valve. The pump is located within the inner cavity of the surrounding buoy 280. The pump's inlet is connected to one end of the pumping pipe, and the other end of the pumping pipe extends through the surrounding buoy 280 and communicates with the outside world. The pumping pipe is provided with a control valve. When the pump is operating, seawater is drawn into the surrounding buoy 280 through the pumping pipe. When the pump is shut down and the control valve is open, seawater is discharged from the surrounding buoy 280. The pump, pumping pipe, and control valve interact to control the amount of water within the surrounding buoy 280, thereby regulating the buoyancy of the surrounding buoy 280 and keeping the surrounding buoy 280 submerged in seawater.

[0053] Furthermore, the water injection device includes a water level sensor for detecting the water level inside the surrounding buoys 280. The water level sensor is electrically or signal-connected to the pump. Specifically, the water level sensor is installed within the surrounding buoys 280 to monitor the water level in real time, providing data feedback for ballast water regulation.

[0054] The above arrangement utilizes a water injection device to adjust the water carrying capacity of the surrounding buoys 280, and at the same time cooperates with the dynamic transformation of the overall structure of the platform, so that the stability, power generation efficiency, safety and other factors of the platform can be adjusted according to the sea conditions, thereby better adapting to the complex and changeable marine environment of the deep sea.

[0055] It should be noted that the method of judging sea condition data is a conventional technical means and will not be elaborated here. The water injection device controls the opening and closing of the pump through sea condition data and real-time data feedback from the water level sensor, which can ensure the synchronization and accuracy of the adjustment process.

[0056] In addition, a counterweight block may be welded and fixed to the bottom of the surrounding buoys 280 to prevent the surrounding buoys 280 from completely floating on the sea surface, thereby improving the stability of the surrounding buoys 280.

[0057] To facilitate installation, a first clamp is provided on the central buoy 270, and each of the surrounding buoys 280 is hinged to the first clamp via a main support beam upper hinge 210. Furthermore, a second clamp is provided on each of the surrounding buoys 280, and each of the secondary support beams 240 is hinged to the second clamp via a secondary support beam rear end hinge 260.

[0058] like Figure 2 As shown, the first clamp is a circular ring and the second clamp is a semicircular ring. The first clamp and the second clamp can be connected to the central buoy 270 and the surrounding buoys 280 respectively by welding.

[0059] like Figure 1As shown, mooring system 300 can be an anchoring device such as a catenary or cable, connecting the platform to the seabed and limiting its horizontal displacement while allowing a certain degree of dynamic response. A catenary is a naturally drooping, flexible anchor chain that balances its own gravity and buoyancy, absorbing wave energy and reducing impact forces on the platform. The number of mooring systems 300 can be adaptively selected based on actual needs.

[0060] In summary, the present invention aims to solve the problem that traditional floating wind power platforms are difficult to adapt to complex and changeable sea conditions due to their fixed structure. Through the ballast water regulation effect, the platform can maintain a semi-submersible structure (partial immersion to provide buoyancy, with a lower center of gravity) in medium and low sea conditions to optimize stability. In extreme sea conditions or when moving to sea areas of different depths, it is converted into a Spar structure (most of it sinks underwater to reduce heave motion) to reduce overall movement and adapt to different water depths. By dynamically adjusting the structural form, the adaptability and stability of the floating wind power platform in different marine environments are improved.

[0061] In the description of this application, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0062] In the description of this application, the meaning of "plurality" is more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0063] As used in this application and the claims, unless the context clearly indicates an exception, the terms "a," "an," "an," and / or "the" are not intended to refer to the singular and may include the plural, unless the context clearly indicates otherwise. Generally speaking, the terms "comprises" and "include" only indicate the inclusion of the steps and elements specifically identified, and these steps and elements do not constitute an exclusive list. A method or apparatus may also include other steps or elements. The phrase "comprises a..." does not preclude the presence of additional identical elements in the process, method, product, or apparatus that includes the elements.

[0064] In the description of the embodiments of this application, unless otherwise specified, " / " represents or. For example, A / B can represent A or B. "And / or" in this article is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of this application, "plurality" means two or more than two.

[0065] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0066] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0067] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A sea-condition adaptive convertible floating wind power platform, characterized in that: include: Wind turbine (100), semi-submersible floating platform (200) and mooring system (300); The semi-submersible floating platform (200) includes a plurality of main support beams (220), a plurality of secondary support beams (240), a central buoy (270) and a plurality of surrounding buoys (280), wherein the plurality of surrounding buoys (280) are arranged in the circumferential direction of the central buoy (270), the two ends of each main support beam (220) are respectively hinged to the central buoy (270) and the corresponding surrounding buoys (280), the two ends of the secondary support beam (240) are respectively hinged to the central buoy (270) and the corresponding surrounding buoys (280), the height of the hinge point between the main support beam (220) and the central buoy (270) is higher than the height of the hinge point between the secondary support beam (240) and the central buoy (270), and the height of the hinge point between the main support beam (220) and the surrounding buoys (280) is lower than the height of the hinge point between the secondary support beam (240) and the surrounding buoys (280); The wind turbine generator set (100) and the mooring system (300) are respectively provided at the upper and lower ends of the central buoy (270), and a water injection device is provided on the surrounding buoys (280); The mooring system (300) is used to anchor the semi-submersible floating platform (200) on the seabed.

2. The sea-condition adaptive convertible floating wind power platform according to claim 1 is characterized in that: The semi-submersible floating platform (200) and the wind turbine generator set (100) are coaxially arranged.

3. The sea-condition adaptive convertible floating wind power platform according to claim 2 is characterized in that: The number of the surrounding buoys (280) is 3-5.

4. The sea-condition adaptive convertible floating wind power platform according to claim 1, characterized in that: The wind turbine generator set (100) comprises a wind turbine (110) and a tower (120), wherein the wind turbine (110) is installed on the top of the tower (120).

5. The sea-condition adaptive convertible floating wind power platform according to claim 1, characterized in that: The water injection device comprises a water pump, a water pumping pipe and a control valve. The water pump is arranged in the inner cavity of the surrounding buoy (280). The inlet of the water pump is connected to one end of the water pumping pipe. The other end of the water pumping pipe passes through the surrounding buoy (280) and is connected to the outside. The control valve is arranged on the water pumping pipe.

6. The sea-condition adaptive convertible floating wind power platform according to claim 5, characterized in that: The water injection device further comprises a water level sensor for detecting the water level height inside the surrounding buoys (280); the water level sensor is electrically connected or signal-connected to the water pump.

7. The sea-condition adaptive convertible floating wind power platform according to claim 1, characterized in that: A first clamp is provided on the central buoy (270), and each of the peripheral buoys (280) is hingedly connected to the first clamp via a hinge (210) on the upper portion of a main support beam; And / or, a second clamp is provided on the surrounding buoys (280), and each of the secondary support beams (240) is hinged to the second clamp via a hinge (260) at the rear end of the secondary support beam.

8. The sea-condition adaptive convertible floating wind power platform according to claim 7 is characterized in that: The first clamp is a circular ring, and / or the second clamp is a semicircular ring.

9. The sea-condition adaptive convertible floating wind power platform according to claim 1, characterized in that: A counterweight is provided at the bottom of the surrounding buoy (280).

10. The sea-condition adaptive convertible floating wind power platform according to claim 1, characterized in that: The mooring system (300) includes a catenary or a cable.

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