A floating wind turbine foundation

Abstract

The present application relates to the technical field of floating wind power platform, and particularly relates to a floating wind turbine foundation, which comprises a mounting foundation, a semi-submersible platform, at least three anti-rolling assemblies, a gyroscope and a controller, the semi-submersible platform is connected to the middle area of the top of the mounting foundation, the at least three anti-rolling assemblies are evenly spaced on the outer periphery of the semi-submersible platform and are connected to the outer periphery of the mounting foundation, and the gyroscope and the controller are respectively installed on the semi-submersible platform; the anti-rolling assembly comprises a stand, an air bag and a gas charging and discharging assembly, the gas charging and discharging assembly is installed in the stand, the bottom of the stand is provided with a drainage tunnel penetrating through both sides of the stand, the air bag is arranged in the drainage tunnel and connected to the stand, the air bag is provided with a gas pumping port, the gas charging and discharging assembly is in communication with the gas pumping port, and the controller is electrically connected to the gyroscope and the gas charging and discharging assembly; the present application can quickly adjust the inclination angle of the semi-submersible platform and effectively suppress the shaking of the semi-submersible platform in the wind and waves.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of floating wind turbine platforms, and particularly relates to a floating wind turbine foundation. BACKGROUND

[0002] The global energy is accelerating the transformation to clean energy, and offshore wind power has become a development focus due to advantages such as abundant resources and stable power generation. With the saturation of nearshore development, deep-sea wind power has great potential, but the traditional fixed foundation is limited by water depth, and the floating foundation has become a key technology for deep-sea wind power development and has a broad application prospect in the future. At present, the floating wind turbine foundation technology is mostly in the demonstration stage, and there are few commercial projects. The structural forms mainly include semi-submersible, TLP, etc., among which the semi-submersible is the most widely used due to its application to water depth exceeding 200 meters and excellent structural performance.

[0003] However, the semi-submersible floating wind turbine faces a problem that needs to be solved in practical application: under the action of complex and changeable wind and wave environment, the semi-submersible foundation will inevitably sway. This sway will cause the wind-attack angle of the wind turbine blade to deviate, thereby reducing the power generation efficiency of the wind turbine and reducing the power generation capacity. When the sway degree is too large, the wind turbine needs to be shut down for self-protection to avoid equipment damage, which not only seriously affects the economic benefits of the offshore wind farm, but also limits the further popularization and application of the floating wind power technology.

[0004] To solve the above problems, various types of semi-submersible foundations have been developed in the prior art, including conventional floating wind turbine foundations, anti-rolling floating wind turbine foundations, and damping floating wind turbine foundations. The conventional floating wind turbine foundation provides a basic framework for subsequent technological development; the anti-rolling floating wind turbine foundation alleviates the sway of the foundation to a certain extent by improving the structural design or adding auxiliary devices; and the damping floating wind turbine foundation uses damping materials or damping devices to absorb and dissipate the energy generated by wind and waves, thereby achieving the purpose of reducing sway. However, these existing technologies still have certain limitations, such as unsatisfactory anti-rolling effect, increased cost due to complex structure, and the need to improve equipment reliability, which makes it difficult to meet the needs of large-scale commercial development of deep-sea wind power, and further technological innovation and breakthroughs are needed. SUMMARY

[0005] The purpose of the present application is to provide a floating wind turbine foundation that can effectively suppress the sway of a semi-submersible foundation in wind and waves.

[0006] To achieve the above purpose, a floating wind turbine foundation adopted by the present application comprises: a mounting foundation, a semi-submersible platform, at least three anti-rolling assemblies, a gyroscope, a controller,

[0007] The semi-submersible platform is fixedly connected to a middle region of a top of the installation foundation, the at least three anti-rolling assemblies are uniformly spaced on an outer periphery of the semi-submersible platform, and the anti-rolling assemblies are fixedly connected to the outer periphery side of the installation foundation, and the gyroscope and the controller are respectively installed on the semi-submersible platform.

[0008] The anti-rolling assembly comprises a column, an air bag and a gas charging and discharging assembly, the bottom of the column is fixedly connected to the outer periphery side of the installation foundation, the gas charging and discharging assembly is installed on the column, the bottom of the column is provided with a drainage tunnel penetrating through both sides thereof, the air bag is arranged in the drainage tunnel and fixedly connected to the column, and the air bag is provided with a pumping port, and the gas charging and discharging assembly is in communication with the pumping port.

[0009] The controller is electrically connected to the gyroscope and the gas charging and discharging assembly, and is configured to:

[0010] acquire the inclination angle of the semi-submersible platform detected by the gyroscope;

[0011] control the working state of each gas charging and discharging assembly according to the inclination angle, so as to inflate or deflate each air bag, and further adjust the semi-submersible platform to a stable posture.

[0012] As a preferred technical solution, the installation foundation comprises a plurality of sequentially connected pontoons, and the pontoons are connected to the seabed through an anchoring system.

[0013] As a preferred technical solution, the gas charging and discharging assembly comprises a high-pressure gas storage tank, an air compressor, an inflation pipe and a deflation pipe.

[0014] The high-pressure gas storage tank and the air compressor are respectively installed on the column, the air compressor is connected to the high-pressure gas storage tank through a pipeline, and the air compressor is used to transport the air extracted from the air bag to the high-pressure gas storage tank through the pipeline for storage, the high-pressure gas storage tank is connected to the pumping port of the air bag through the inflation pipe, and the air compressor is connected to the pumping port of the air bag through the deflation pipe.

[0015] As a preferred technical solution, the height of the drainage tunnel is h1, and the length of the air bag when fully expanded is L1, wherein h1>L1.

[0016] As a preferred technical scheme, the inside of the column is sequentially separated into multiple cabins from top to bottom by steel structures, wherein the cabin at the top of the column is an anchor chain cabin for accommodating anchor chains, the cabin at the middle of the column and close to the drainage tunnel is an air pressure discharge cabin, the air charging device and the air discharging device are respectively arranged in the air pressure discharge cabin, and the remaining cabins are empty cabins, and the outer peripheral walls of the multiple empty cabins at the lower part of the column jointly define the drainage tunnel.

[0017] As a preferred technical scheme, the roll stabilization assembly further comprises a plurality of reinforcing members, the plurality of reinforcing members are arranged symmetrically on both sides of the air bag from top to bottom, and the reinforcing members are fixedly connected with the air bag.

[0018] As a preferred technical scheme, the reinforcing member is a ring-shaped reinforcing steel bar.

[0019] As a preferred technical scheme, the pontoon is internally provided with a counterweight.

[0020] As a preferred technical scheme, the bottom of the semi-submersible platform is provided with a submarine cable passage for allowing submarine cables to enter the inside of the semi-submersible platform from the seabed.

[0021] The floating wind turbine foundation has the beneficial effects that, by controlling the inclination angle of the monitoring gyroscope, the air bag is inflated or deflated by the air charging and discharging assembly on the column in the corresponding inclined position, so that the seawater in the drainage tunnel under the column is squeezed out or the seawater enters the drainage tunnel, the buoyancy of the column is changed, the column is floated or lowered, the original draught of the column is restored, and the inclination of the semi-submersible platform is inhibited. The device can quickly adjust the buoyancy of the column, so that the semi-submersible platform is kept balanced and the semi-submersible platform is inhibited from shaking in the wind and waves. BRIEF DESCRIPTION OF DRAWINGS

[0022] The application will be described in further detail below in connection with the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of explaining the preferred embodiments and thus should not be regarded as limiting the scope of the application. In addition, unless specifically indicated, the drawings are only intended to conceptually represent the composition or structure of the described objects and can include exaggerated displays, and the drawings are not necessarily drawn to scale.

[0023] Fig. 1 is a front view of the floating wind turbine foundation of the application;

[0024] Fig. 2 is a top view of the floating wind turbine foundation of the application;

[0025] Fig. 3 Structure diagram of the application in the case of inclination;

[0026] Fig. 4 Structure diagram of the application in the case of inclination;

[0027] Fig. 5 Structure diagram of the application in the case of inclination;

[0028] Wherein: 1, installation foundation; 11, buoy; 2, semi-submersible platform; 21, sea cable passage; 3, anti-rolling assembly; 31, vertical column; 311, anchor chain cabin; 312, air pressure cabin; 313, empty cabin; 314, drainage tunnel; 32, air bag; 33, inflation and deflation assembly; 331, inflation pipe; 332, air exhaust pipe; 333, high-pressure gas storage tank; 334, air compressor; 34, ring reinforcement; 4, gyroscope. DETAILED DESCRIPTION

[0029] 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 notations represent the same or similar elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0030] In the description of the present application, it should be understood that the terms "front", "back", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, in the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0031] Please refer to Figs. 1-3 A floating fan foundation provided by the embodiment of the present application, comprising: an installation foundation 1, a semi-submersible platform 2, at least three anti-rolling assemblies 3, a gyroscope 4, and a controller (not specifically shown in the figure).

[0032] The semi-submersible platform 2 is fixedly connected to the middle area of the top of the installation foundation 1, and at least three anti-rolling assemblies 3 are evenly spaced on the outer periphery of the semi-submersible platform 2, and the anti-rolling assemblies 3 are fixedly connected to the outer periphery side of the installation foundation 1, and the gyroscope 4 and the controller are respectively installed on the semi-submersible platform 2.

[0033] The roll damping assembly 3 comprises a column 31, an air bag 32 and a gas charging and discharging assembly 33, the bottom of the column 31 is fixedly connected to the outer circumferential side of the mounting base 1, the gas charging and discharging assembly 33 is mounted on the column 31, the bottom of the column 31 is provided with a drainage tunnel 314 penetrating through both sides thereof, the air bag 32 is arranged in the drainage tunnel 314, and the air bag 32 is fixedly connected to the column 31, the air bag 32 is provided with a pumping port, and the gas charging and discharging assembly 33 is in communication with the pumping port;

[0034] The controller is electrically connected to the gyroscope 4 and the gas charging and discharging assembly 33, and is configured to:

[0035] obtain the inclination angle of the semi-submersible platform 2 detected by the gyroscope 4;

[0036] control the working state of each gas charging and discharging assembly 33 according to the inclination angle, so as to inflate or deflate each air bag 32, and further adjust the semi-submersible platform 2 to a stable posture.

[0037] In the embodiment, the semi-submersible platform 2 and at least three roll damping assemblies 3 are spaced apart and mounted on the mounting base 1, and the at least three roll damping assemblies 3 are uniformly spaced apart around the outer circumferential side of the semi-submersible platform 2, the included angle between any two of the three roll damping assemblies 3 is 120°, the semi-submersible platform 2 is provided with a gyroscope 4 and a controller, the controller can monitor the inclination angle of the gyroscope 4 in real time; the roll damping assembly 3 is composed of a column 31, an air bag 32 and a gas charging and discharging assembly 33, the lower part of the column 31 is provided with a drainage tunnel 314 penetrating through both sides thereof, the air bag 32 is arranged in the drainage tunnel 314, the top of the air bag 32 is fixedly connected to the column 31, the air bag 32 is provided with a pumping port, the gas charging and discharging assembly 33 is connected to the pumping port of the air bag 32, and the gas charging and discharging assembly 33 is electrically connected to the controller. In actual use, when the controller detects that the gyroscope 4 is inclined to a certain side, the controller controls the gas charging and discharging assembly 33 on the column 31 corresponding to the inclined side to inflate or deflate the air bag 32, so that the volume of the air bag 32 increases or decreases, so as to extrude or make more seawater enter the drainage tunnel 314, so as to increase or decrease the buoyancy of the column 31, increase or decrease the draft of the column 31, and make the gyroscope 4 return to the balance state, that is, make the device keep balance on the sea surface. The device can quickly adjust the buoyancy of the device to keep the device balanced, and effectively suppress the shaking of the device in the wind and waves.

[0038] It is worth noting that the semi-submersible platform 2 and the roll damping assembly 3 are welded to the mounting base 1, and the stability of the connection is ensured by welding, so as to avoid the structure from falling off under the impact of wind and waves and affect the stability of the device.

[0039] In some embodiments, the installation foundation 1 comprises a plurality of sequentially connected pontoons 11, which are connected to the seabed by an anchoring system. The pontoons 11 are fixedly connected to the seabed by the anchoring system, and the plurality of sequentially connected pontoons 11 form the installation foundation 1, so that the installation foundation 1 is firmly connected to the seabed and has sufficient buoyancy to support the semi-submersible platform 2, the anti-rolling assembly 3, and the like above the installation foundation 1.

[0040] In some embodiments, the air charging and discharging assembly 33 comprises a high-pressure gas tank 333, an air compressor 334, an air charging pipe 331, and an air discharging pipe 332. The high-pressure gas tank 333 and the air compressor 334 are respectively installed on the column 31. The air compressor 334 is connected to the high-pressure gas tank 333 by a pipeline, and is used to transport the air extracted from the air bag 32 to the high-pressure gas tank 333 for storage. The high-pressure gas tank 333 is connected to the air inlet of the air bag 32 by the air charging pipe 331, and the air compressor 334 is connected to the air inlet of the air bag 32 by the air discharging pipe 332.

[0041] In the present embodiment, when the air bag 32 is inflated, the high-pressure gas tank 333 directly releases high-pressure air to the air bag 32 to quickly increase the buoyancy. When the air bag 32 is deflated, the air compressor 334 “recycles” the air in the air bag 32, so that the next time the air bag 32 is inflated, it does not need to completely rely on the initial reserve of the high-pressure gas tank 333. This is equivalent to converting the gas energy of the air bag 32 when it is deflated into potential energy of the high-pressure gas tank 333, avoiding the waste of energy caused by direct discharge to the atmosphere, and effectively reducing energy consumption in the scene of frequent buoyancy adjustment (such as coping with frequent wind and wave changes).

[0042] In some embodiments, the height of the drainage tunnel 314 is h1, and the length of the air bag 32 when fully expanded is L1, where h1>L1. In this way, on the one hand, when the height of the channel is greater than the length of the air bag 32 when fully expanded, the air bag 32 is not limited by the top of the channel during inflation, and can fully expand to the designed volume. On the other hand, after reserving a margin for the height of the channel, different degrees of buoyancy change can be achieved by controlling the inflation amount of the air bag 32, which makes the system adapt to various working conditions. In addition, if the height of the channel is comparable to the length of the air bag 32 when fully expanded, the air bag 32 may be squeezed at the top during inflation, causing local pressure to be too high, which can easily cause the air bag 32 to wear, break, or leak at the interface. When the height of the channel is greater than the length of the air bag 32 when fully expanded, the air bag 32 has more freedom in the expansion direction, which can reduce local stress concentration caused by squeezing and prolong the service life of the air bag 32.

[0043] In some embodiments, the interior of the column 31 is divided into multiple compartments from top to bottom by steel structures, wherein the compartment at the top of the column 31 is an anchor chain compartment 311 for accommodating anchor chains, the compartment at the middle of the column 31 and close to the drainage tunnel 314 is an air pressure discharge compartment 312, the high-pressure gas storage tank 333 and the air compressor 334 are arranged in the air pressure discharge compartment 312 respectively, and the remaining compartments are empty compartments 313. The outer peripheral walls of the multiple empty compartments 313 at the lower part of the column 31 jointly define the drainage tunnel 314.

[0044] In the present embodiment, the anchor chain compartment 311 is arranged at the top of the column 31, and the anchor chains naturally fall by gravity, facilitating quick lowering of the anchor chains during anchoring and reducing the risk of entanglement of the anchor chains when stacked. The high-pressure gas storage tank 333 and the air compressor 334 are arranged in the middle compartment, above the waterline of the platform, so as to avoid direct intrusion of seawater into the equipment and reduce the risk of damage to electrical components due to moisture. Moreover, the air pressure discharge compartment 312 is close to the drainage tunnel 314 where the air bag 32 is arranged, which can effectively shorten the length of the gas pipeline, reduce the transmission loss of air pressure, make the response speed of the air bag 32 faster when inflating or deflating, and facilitate real-time adjustment of the buoyancy of the column 31.

[0045] Please refer to Figs. 4-5 In some embodiments, the roll damping assembly 3 further comprises a plurality of reinforcing members arranged symmetrically and spaced from top to bottom on both sides of the air bag 32, and the reinforcing members are fixedly connected with the air bag 32. When the air bag 32 is inflated, the internal air pressure will cause the air bag 32 to have a tendency to expand radially and extend axially. The reinforcing members symmetrically constrain the radial expansion and concentrate the air pressure energy for axial extension, ensuring that the air bag 32 extends linearly along the length direction and avoiding shape distortion due to excessive radial bulging. Moreover, the loads such as seawater pressure and inflation air pressure are symmetrically transmitted through the reinforcing members, avoiding that a certain part of the air bag 32 bears excessive stress and reducing the probability of damage to the air bag 32.

[0046] In some embodiments, the reinforcing members are annular reinforcing bars 34. The annular reinforcing bars 34 are closed along the circumferential direction of the air bag 32, and compared with longitudinal or oblique reinforcing bars, have more direct constraint force on radial expansion, can accurately control the cross-sectional shape of the air bag 32, and avoid axial extension deviation due to radial deformation. It is worth noting that a binding belt is arranged on the outer periphery of the air bag 32 in the present application, and the annular reinforcing bars 34 are bound on the outer periphery of the air bag 32 through the binding belt. When the air bag 32 is replaced, the annular reinforcing bars 34 can be easily removed for storage and arrangement of the air bag 32.

[0047] In some embodiments, the pontoon 11 is provided with a counterweight. The semi-submersible platform 2, the stabilizing assembly 3 and other structures are easily subjected to horizontal loads such as wind and waves, ocean currents and the like, which will generate overturning moments on the installation foundation 1. By adding a counterweight in the pontoon 11, the weight of the installation foundation 1 is increased, and a larger “anti-overturning moment” is formed to balance the overturning tendency caused by external loads. In addition, increasing the weight of the installation foundation 1 can effectively reduce the height of the center of gravity of the entire structure. The lower the center of gravity, the greater the restoring moment of the structure when subjected to external disturbances, and the less likely the structure will tilt, which can further ensure the stability of the device.

[0048] See Figs. 1-3 In some embodiments, the bottom of the semi-submersible platform 2 is provided with a submarine cable passage 21 for allowing submarine cables to enter the interior of the semi-submersible platform 2 from the seabed. Submarine cables directly laid on the seabed are easily affected by factors such as ocean current scouring, ship anchoring, and seabed topography changes, which can cause abrasion of the insulation layer, rupture of the metal sheath, or even breakage of the cable core. The submarine cable passage 21 can form a physical barrier to isolate the submarine cable from the external environment, and the submarine cable passage 21 is in communication with the electrical cabin and the like inside the semi-submersible platform 2, which can effectively shorten the laying path of the submarine cable from the seabed to the equipment.

[0049] In summary, the floating wind turbine foundation provided in the embodiment adjusts the air volume in the air bag 32 arranged on the column 31 to adjust the seawater volume in the drainage tunnel 314 below the column 31, thereby changing the buoyancy of the column 31, so that the column 31 maintains a certain draft height, and then ensures that the entire device remains stable on the sea surface. The device can quickly adjust the buoyancy of the device to adjust the inclination angle of the device, so that the device as a whole remains balanced, effectively suppressing the shaking of the device in the wind and waves, and avoiding affecting the wind turbine power generation.

[0050] This specification discloses the present application with reference to the accompanying drawings, and also enables those skilled in the art to implement the present application, including manufacturing and using any device or system, using appropriate materials, and using any combined method. The scope of the present application is defined by the claimed technical solutions, and includes other examples that those skilled in the art can think of. As long as such other examples include structural elements that are not different from the literal language of the claimed technical solutions, or such other examples contain equivalent structural elements that are not substantially different from the literal language of the claimed technical solutions, such other examples should be considered to be within the protection scope determined by the claimed technical solutions of the present application.

Claims

1. A floating wind turbine foundation, characterized in that The utility model relates to a kind of installation foundation, semi-submersible platform, at least three anti-rolling components, gyroscope, controller, The semi-submersible platform is fixedly connected to the top middle area of the installation foundation, at least three anti-rolling components are evenly spaced on the outer periphery of the semi-submersible platform, and the anti-rolling components are fixedly connected to the outer periphery side of the installation foundation, and the gyroscope and the controller are respectively installed on the semi-submersible platform. The anti-rolling component includes a column, an air bag and a gas charging and discharging component, the bottom of the column is fixedly connected to the outer periphery side of the installation foundation, the gas charging and discharging component is installed on the column, the bottom of the column is provided with a drainage tunnel penetrating through both sides thereof, the drainage tunnel is vertically arranged in the interior of the column, the air bag is arranged in the drainage tunnel, and the air bag is fixedly connected to the column, the air bag has a pump port, and the gas charging and discharging component is in communication with the pump port. The controller is electrically connected to the gyroscope and the gas charging and discharging component, and the controller is configured to: obtain the inclination angle of the semi-submersible platform detected by the gyroscope; control the working state of each gas charging and discharging component according to the inclination angle, so as to inflate or deflate each air bag, and then adjust the semi-submersible platform to a stable posture. The gas charging and discharging component includes a high-pressure gas storage tank, an air compressor, an inflation pipe and an air extraction pipe. The high-pressure gas storage tank and the air compressor are respectively installed on the column, the air compressor is connected to the high-pressure gas storage tank through a pipeline, and the air compressor is used to transport the air extracted from the air bag to the high-pressure gas storage tank through the pipeline for storage, the high-pressure gas storage tank is connected to the pump port of the air bag through the inflation pipe, and the air compressor is connected to the pump port of the air bag through the air extraction pipe. The height of the drainage tunnel is h1, and the length of the air bag when fully expanded is L1, wherein h1>L1. The anti-rolling component further includes a plurality of reinforcing members, the reinforcing members are spaced and symmetrically arranged on both sides of the air bag from top to bottom, and the reinforcing members are fixedly connected to the air bag; the reinforcing members are annular reinforcing bars. The interior of the column is sequentially divided into a plurality of compartments from top to bottom by a steel structure, wherein the compartment at the top of the column is an anchor chain compartment for accommodating anchor chains, the compartment at the middle of the column and close to the drainage tunnel is an air pressure discharge compartment, the inflation device and the air extraction device are arranged in the air pressure discharge compartment, and the remaining compartments are empty compartments, and the outer peripheral walls of the plurality of empty compartments at the lower part of the column jointly define the drainage tunnel. The installation foundation includes a plurality of sequentially connected pontoons, and the pontoons are connected to the seabed by an anchoring system.

2. The floating wind turbine foundation of claim 1, wherein, The pontoon is provided with a counterweight.

3. The floating wind turbine foundation of claim 2, wherein, The bottom of the semi-submersible platform is provided with a submarine cable passage for allowing submarine cables to enter the interior of the semi-submersible platform from the seabed.

4. The floating wind turbine foundation of claim 1, wherein, ​

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