Wind power foundation

Abstract

The utility model provides a wind power foundation which comprises a single pile foundation, a jacket and a floating body, and the single pile foundation is used for being fixed to the ground; the jacket is arranged above the single-pile foundation, and the top of the jacket is used for supporting a tower; the floating body is connected between the single pile foundation and the jacket, the floating body is provided with an internal containing cavity used for containing a counter weight, the internal containing cavity is formed in the floating body, the overall density of the floating body can be smaller than the density of seawater, and therefore the floating body can be subjected to the buoyancy effect of the seawater, and the floating body is prevented from falling off. The floating body can improve the structural damping of the wind power foundation, the lateral deformation resistance of the wind power foundation is improved, and therefore the possibility that the wind power foundation is suitable for deep sea is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure belongs to the technical field of wind power generation, and particularly relates to a wind power foundation. BACKGROUND

[0002] At present, offshore wind power development has entered a stage of large-scale and commercial development. The wind power foundation of offshore units is usually composed of welded steel pipes rolled from steel plates. The wind power foundation has small structural strength, low natural frequency, and is prone to lateral deformation under horizontal external force, which greatly affects the structural safety of the wind power foundation due to wave or seabed scouring. CONTENT OF THE UTILITY MODEL

[0003] The main purpose of the present disclosure is to provide a wind power foundation to improve its ability to resist lateral deformation.

[0004] To achieve the above purpose, the present disclosure provides the following technical solutions.

[0005] The present disclosure provides a wind power foundation, which comprises a single-pile foundation, a jacket, and a float, the single-pile foundation is used for being fixed to the ground; the jacket is arranged above the single-pile foundation, and the top of the jacket is used for supporting a tower; the float is connected between the single-pile foundation and the jacket, and the float has an internal accommodating cavity for accommodating a counterweight.

[0006] In an example embodiment of the present disclosure, the counterweight comprises counterweight liquid, the wind power foundation further comprises a pump body, the internal accommodating cavity comprises a plurality of accommodating units, each of the accommodating units is in communication with the pump body through a pipeline, the pump body can add counterweight liquid to at least one of the accommodating units or discharge counterweight liquid from at least one of the accommodating units.

[0007] Optionally, the wind power foundation further comprises a ballast control system and a monitoring system, the monitoring system is used for monitoring motion parameters of the wind power foundation, and the ballast control system can control the pump body to add or remove counterweight liquid from each of the accommodating units in response to monitoring data of the monitoring system.

[0008] Specifically, the motion parameters comprise a swing speed, a swing acceleration, or a swing displacement of the wind power foundation.

[0009] Further, the plurality of accommodating units are uniformly arranged along the circumference of the wind power foundation; and / or, the plurality of accommodating units are arranged side by side so that the float has a honeycomb structure.

[0010] Optionally, the internal accommodating cavity of the floating body is arranged in a closed structure, and the internal accommodating cavity is configured with the ballast liquid, and a volume-to-volume ratio γ of the ballast liquid to the internal accommodating cavity satisfies 40%≤γ≤60%.

[0011] In another example embodiment of the present disclosure, the plurality of accommodating units are communicated through pipelines, and the pump body is capable of pumping the ballast liquid in at least one of the plurality of accommodating units into at least one other of the plurality of accommodating units.

[0012] Optionally, the floating body is in a cylindrical structure, a top end surface of the floating body is fixed to a bottom end of the jacket, and a bottom end surface of the floating body is fixed to a top end of the monopile foundation; and / or the floating body is a metal piece.

[0013] Specifically, the wind power foundation further comprises a stay cable, one end of the stay cable is connected to the jacket, and the other end of the stay cable is used for connecting the ground.

[0014] Further, the wind power foundation is suitable for an offshore wind power foundation, and a top end portion of the jacket is used for being arranged above a sea surface.

[0015] The wind power foundation provided by the present disclosure has at least the following beneficial effects: the wind power foundation provided by the present disclosure, by arranging the internal accommodating cavity in the floating body, can make the overall average density of the floating body less than the density of seawater, so that the floating body can be subjected to the buoyancy of seawater, so that the floating body can improve the structural damping of the wind power foundation, improve the ability of the wind power foundation to resist lateral deformation, and thus improve the possibility of the wind power foundation being suitable for deep sea. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and / or other purposes and advantages of the present disclosure will become more apparent by describing embodiments thereof with reference to the accompanying drawings, in which:

[0017] Figure 1 A structural schematic diagram of a wind power foundation provided by a first example embodiment of the present disclosure.

[0018] Figure 2 A structural schematic diagram of a wind power foundation provided by a second example embodiment of the present disclosure.

[0019] REFERENCE SIGNS:

[0020] 1, support tower; 2, foundation platform;

[0021] 3, jacket;

[0022] 4, floating body; 5, accommodating unit;

[0023] 6, monopile foundation; 7, stay cable. DETAILED DESCRIPTION

[0024] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings. The example embodiments, however, can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Like reference numerals refer to like elements throughout the drawings and detailed descriptions thereof.

[0025] With the continuous development of deep-sea projects, the number of offshore wind turbine generators is increasing year by year, and the safety of offshore wind turbine generators is gradually attracting attention.

[0026] The present disclosure provides a wind power foundation, which is particularly suitable for offshore wind turbine generators, but is not limited thereto, and can also be applied to onshore wind turbine generators as needed.

[0027] With reference to Figure 1 and Figure 2 , the wind power foundation comprises a monopile foundation 6, a jacket 3 and a float 4, the monopile foundation 6 is used to be fixed to the ground; the jacket 3 is arranged above the monopile foundation 6, the top of the jacket 3 is used to support a tower 1; the float 4 is connected between the monopile foundation 6 and the jacket 3, and the float 4 has an internal receiving cavity for accommodating a counterweight.

[0028] The wind power foundation provided by the present disclosure sets a float 4 between the monopile foundation 6 and the jacket 3, and by setting the float 4, the contact area between the monopile foundation 6 and the jacket 3 is increased. On the basis of reliable connection of the monopile foundation 6 and the jacket 3 with the float 4 respectively, the jacket 3 can be reliably connected to the monopile foundation 6.

[0029] It can be understood that when the wind power foundation is applied to an offshore wind power foundation, the ground is the seabed, and when the wind power foundation is applied to an onshore wind power foundation, the ground is land. The present disclosure will be described taking the ground as the seabed mud surface as an example.

[0030] Specifically, the jacket 3 is usually a space truss structure formed by a plurality of guide pipe legs and struts, for example but not limited to, the guide pipe legs extend longitudinally and are arranged at intervals in the horizontal direction, and the struts are connected between the guide pipe legs, thereby forming a space truss structure with predetermined structural strength, rigidity and stability. As can be seen, the bottom ends of the plurality of guide pipe legs constitute the bottom end of the jacket 3, and when the jacket 3 is connected to the monopile foundation 6, the connection strength is inevitably insufficient. The present disclosure sets a float 4 so that the jacket 3 and the monopile foundation 6 can be in full contact with the float 4 respectively, thereby improving the structural strength of the wind power foundation and effectively overcoming the technical problem of insufficient connection strength of the jacket 3 and the monopile foundation 6.

[0031] Furthermore, by providing an internal cavity within the float 4, the overall average density of the float 4 can be made less than the density of seawater. This allows the float 4 to be subjected to the buoyancy of seawater, thereby increasing the structural damping of the wind turbine foundation, enhancing its resistance to lateral deformation, and thus improving its adaptability to different water depths. This, in turn, increases the likelihood that the wind turbine foundation will be suitable for deep-sea applications.

[0032] When the wind turbine foundation is subjected to horizontal lateral forces caused by factors such as wave impact, the wind turbine foundation has predetermined damping because it includes a floating body 4, which can reduce the movement amplitude of the wind turbine foundation.

[0033] When the aforementioned wind power foundation is applied to offshore wind turbine generators, the bottom end of the monopile foundation 6 can be buried in the seabed mud surface, so that the wind power foundation with the monopile foundation 6 can be fixed to the seabed. As an example, the monopile foundation 6 can be a driven monopile foundation, which reduces construction steps and construction period and improves construction efficiency, but is not limited thereto.

[0034] Reference Figure 1 and Figure 2 The jacket 3 can be set above the monopile foundation 6, for example, but not limited to, the jacket 3 can be set directly on the top surface of the floating body 4 and extend upward to above the sea surface. A tower can be set on the top of the jacket 3. This setting can greatly reduce the wave-loaded area, thereby reducing the wave load, but it is not limited to this.

[0035] As an example, a foundation platform 2 is provided on top of the jacket 3, and the bottom of the tower can be directly fixed to the foundation platform 2, but this is not a limitation.

[0036] Continue to refer to Figure 1 and Figure 2 The diagram shows a wind turbine foundation used in offshore wind turbine generators. The present invention uses a float 4 placed between a monopile foundation 6 and a jacket 3 and kept submerged in seawater to receive the upward buoyancy of the seawater. This float 4 can increase the structural damping of the wind turbine foundation and improve its ability to resist lateral deformation, thereby increasing the possibility of the wind turbine foundation being suitable for deep sea applications.

[0037] As an example, float 4 is positioned below the water depth affected by high waves, but is not limited to this.

[0038] Further, the floating body 4 can be in a cylindrical structure, the top end of the floating body 4 is fixed to the bottom end of the jacket 3, and the bottom end of the floating body 4 is fixed to the top end of the monopile foundation 6. In this way, the structure of the floating body 4 is simpler, and the manufacturing difficulty and cost of the floating body 4 are reduced. At the same time, the floating body 4 continuously extends in the circumferential direction of the wind power foundation, so that the effective force receiving area of the floating body 4 in each direction of the wind power foundation can be the same.

[0039] As an example, the floating body 4 is made of metal, so that the floating body 4 has better structural strength.

[0040] Further, the floating body 4 can be a closed structure, for example but not limited to, the internal accommodating cavity of the floating body 4 is arranged in a closed structure, and the internal accommodating cavity is configured with a heavy liquid.

[0041] The present disclosure can effectively prevent external seawater from entering the floating body 4 by arranging the floating body 4 in a closed structure, thereby avoiding the corrosion of seawater to the structure of the floating body 4 and improving the service life of the floating body 4, thereby improving the service life of the wind power foundation, but not limited thereto. According to the need, the heavy liquid can be seawater, which can be pumped and placed in a predetermined area of the internal accommodating cavity during the operation of the pump body. Correspondingly, the heavy liquid in the predetermined area of the internal accommodating cavity can also be pumped and discharged into the seawater.

[0042] In order to further improve the adjustment accuracy of the floating body 4, the wind power foundation further comprises a pump body, and the internal accommodating cavity comprises a plurality of accommodating units 5, each of which can be independent and has a predetermined area. According to the need, the heavy liquid can be pumped out of one or more predetermined accommodating units 5 and placed in one or more predetermined accommodating units 5. Since the area range of the plurality of accommodating units 5 is fixed, a baffle is arranged between the adjacent accommodating units 5 to prevent the heavy liquid from flowing between the accommodating units 5, thereby improving the adjustment accuracy of the floating body 4.

[0043] In order to facilitate the adjustment of the floating body 4, each accommodating unit 5 is communicated with the pump body through a pipeline, and the pump body can add heavy liquid to at least one of the plurality of accommodating units 5 or discharge the heavy liquid in at least one of the plurality of accommodating units 5 to the outside, thereby further improving the reliability of the wind power foundation.

[0044] The pump body can pump the heavy liquid in at least one of the accommodating units 5 on one side of the wind power foundation to at least one of the accommodating units 5 on the opposite side, so that the torque of the floating body 4 on the wind power foundation at least partially offsets the torque of the external force on the wind power foundation, thereby reducing the sensitivity of the wind power foundation to external loads and reducing the movement amplitude of the wind power foundation.

[0045] As an example, the plurality of accommodating units 5 in the floating body 4 can be arranged side by side so that the floating body 4 can be arranged in a honeycomb structure, and the area occupied by each accommodating unit 5 and the volume of each accommodating unit 5 are substantially the same, so as to further improve the adjustment accuracy of the floating body 4.

[0046] As an example, the volume of the ballast liquid in the floating body 4 and the volume ratio γ of the internal accommodating cavity satisfy 40%≤γ≤60%, so as to avoid the internal accommodating cavity being too full and being inconvenient to adjust, that is, by setting a non-full state in the floating body 4, the filling position of the ballast liquid is facilitated to be adjusted.

[0047] In an optional embodiment, the volume of the ballast liquid in the floating body 4 is half of the volume of the floating body formed by the plurality of accommodating units 5, for example but not limited to, the volume of the ballast liquid in each accommodating unit 5 is half of the volume of the accommodating unit 5.

[0048] In the initial state, the volume of the ballast liquid in each accommodating unit 5 is half of the volume of the accommodating unit 5, and the ballast liquid in each accommodating unit 5 can be extracted outwardly or added to each accommodating unit 5, so that the amount of the ballast liquid in each accommodating unit 5 can be adjusted, and the ballast liquid in each accommodating unit 5 can be extracted as needed to reduce or added to increase, so as to realize the torque adjustment of the floating body 4 on the wind power foundation by adjusting the amount of the ballast liquid in the plurality of accommodating units 5. Specifically, the plurality of accommodating units 5 are connected by pipelines, and under the action of the pump body, each accommodating unit 5 can add or reduce the ballast liquid.

[0049] As an example, the plurality of accommodating units 5 are uniformly arranged along the circumference of the wind power foundation, so that each accommodating unit 5 can find another accommodating unit 5 corresponding thereto on the opposite side of the wind power foundation, and the pump body can extract the ballast liquid in the accommodating unit 5 to the accommodating unit 5 opposite thereto, so as to improve the adjustment accuracy of the wind power foundation.

[0050] In order to improve the adjustment accuracy of the wind power foundation, the wind power foundation further comprises a ballast control system and a monitoring system, the monitoring system is used to monitor the motion parameters of the wind power foundation, and the ballast control system can respond to the monitoring data of the monitoring system and control the pump body to add or remove the ballast liquid from each accommodating unit 5.

[0051] The working principle of the ballast system is that the monitoring system can monitor the motion parameters of the wind power foundation in real time, for example, but not limited to, the swing speed of the wind power foundation can be monitored, when the swing speed of the wind power foundation is greater than 0, the ballast control system can receive the motion parameters and determine the adjustment scheme of the ballast liquid in response to the motion parameters, for example, but not limited to, the ballast control system can calculate the direction and size of the external force torque borne by the wind power foundation according to the motion parameters monitored by the monitoring system, so as to determine the torque direction and size that the floating body 4 needs to feedback to the wind power foundation, further determine the information such as which several containing units 5 need to remove the ballast liquid, how much ballast liquid needs to be removed, and which several containing units 5 need to place the ballast liquid, and how much ballast liquid needs to be placed in each containing unit 5, etc. After the ballast control system calculates the adjustment scheme, the pump body can be controlled to operate to remove the appropriate amount of ballast liquid in the predetermined containing unit 5 and place it in the containing unit 5 on the opposite side, so as to realize the torque adjustment of the wind power foundation, so as to reduce the structural motion response of the wind power foundation to the external force torque, thereby reducing the motion amplitude of the wind power foundation and reducing the sensitivity of the wind power foundation to external loads.

[0052] It can be understood that the adjustment of the ballast liquid in the floating body 4 is in response to the motion parameters monitored by the monitoring system at a certain moment. In fact, during the service process of the offshore wind turbine generator set, the motion parameters change in real time, so the monitoring system needs to monitor in real time, and the ballast control system adjusts its adjustment scheme in real time in response to the motion parameters.

[0053] As an example, the motion parameters include the swing speed, swing acceleration or swing displacement of the wind power foundation, but are not limited thereto. Correspondingly, the monitoring system can include a speed sensor for monitoring the swing speed, an acceleration sensor for monitoring the swing acceleration, or a displacement sensor for monitoring the swing displacement, but is not limited thereto.

[0054] In order to further improve the structural strength of the wind power foundation, the wind power foundation further comprises a stay cable 7, one end of the stay cable 7 is connected to the jacket 3, and the other end is used to connect to the ground, so as to further improve the ability of the wind power foundation to resist lateral deformation through the stay cable 7, thereby improving the possibility of the wind power foundation to be suitable for deep sea.

[0055] The wind power foundation provided by the present disclosure can make the overall density of the floating body 4 less than the density of seawater by arranging the internal containing cavity in the floating body 4, so as to make the floating body 4 subjected to the buoyancy of seawater, so that the floating body 4 can improve the structural damping of the wind power foundation, improve the ability of the wind power foundation to resist lateral deformation, and thereby improve the possibility of the wind power foundation to be suitable for deep sea.

[0056] Further, the floating body 4 is a cylinder, and a plurality of containing units 5 are arranged inside the floating body 4, and the floating body 4 can be arranged in a closed mode, so that the floating body 4 is not in communication with the outside seawater, and the seawater outside is prevented from entering the floating body 4 to cause structural corrosion of the floating body 4, thereby prolonging the service life of the floating body 4.

[0057] The wind power foundation provided by the present disclosure can adapt to the deep sea water depth characteristics, and compared with the traditional jacket, the wind power foundation structure has lower steel consumption, a simpler lower structure, easier launching and installation, and lower requirements for the transport ship; compared with the single pile foundation, the wind power foundation greatly reduces the influence of waves on the wind power foundation and greatly improves the applicable water depth.

[0058] In the description of the present disclosure, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present disclosure 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 to the present disclosure.

[0059] The terms "first", "second" are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present disclosure, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0060] In the description of the present disclosure, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting", "fixing" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be mechanically connected, or it can be electrically connected, or it can be communicatively connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0061] The features, structures, or characteristics described in connection with the disclosure can be, for example, in one or more embodiments. In the above description, numerous specific details are provided, such as examples of materials, processes, methods, etc., to provide a thorough understanding of embodiments of the disclosure. It will be apparent, however, to one skilled in the art that the disclosure can be practiced without one or more of the specific details. In other instances, well-known structures, materials, or operations are not shown or described in detail in order to avoid obscuring aspects of the disclosure.

Claims

1. A wind power foundation, characterized in that, The wind power foundation includes: A single pile foundation (6) is used to fix the foundation to the ground. A jacket (3) is installed above the monopile foundation (6), and the top of the jacket (3) is used to support the tower (1); A float (4) is connected between the monopile foundation (6) and the jacket (3), and the float (4) has an internal cavity for accommodating counterweights.

2. The wind power foundation as described in claim 1, characterized in that, The counterweight includes a counterweight liquid, and the wind power foundation also includes a pump body. The internal cavity includes multiple receiving units (5), each receiving unit (5) is connected to the pump body through a pipeline. The pump body can add counterweight liquid to at least one of the multiple receiving units (5), or discharge the counterweight liquid from at least one of the multiple receiving units (5).

3. The wind power foundation as described in claim 2, characterized in that, The wind power foundation also includes a ballast control system and a monitoring system. The monitoring system is used to monitor the motion parameters of the wind power foundation. The ballast control system can respond to the monitoring data of the monitoring system and control the pump to add or remove ballast fluid from each of the housing units (5).

4. The wind power foundation as described in claim 3, characterized in that, The motion parameters include the swaying speed, swaying acceleration, or swaying displacement of the wind power foundation. The monitoring system includes a velocity sensor for monitoring the swaying speed, an acceleration sensor for monitoring the swaying acceleration, or a displacement sensor for monitoring the swaying displacement.

5. The wind power foundation as described in claim 2, characterized in that, Multiple housing units (5) are uniformly arranged along the circumference of the wind power foundation; and / or, multiple housing units (5) are arranged side by side such that the float (4) has a honeycomb structure.

6. The wind power foundation as described in claim 2, characterized in that, The internal cavity of the float (4) is configured as a closed structure, and the counterweight liquid is disposed in the internal cavity. The volume ratio γ of the counterweight liquid in the float (4) to the volume of the internal cavity satisfies 40%≤γ≤60%.

7. The wind power foundation as described in claim 6, characterized in that, The plurality of containment units (5) are connected by pipelines, and the pump body is capable of pumping the counterweight liquid in at least one of the plurality of containment units (5) into at least one other containment unit (5) among the plurality of containment units (5).

8. The wind power foundation as described in any one of claims 1-7, characterized in that, The float (4) has a cylindrical structure, with its top surface fixed to the bottom end of the guide frame (3) and its bottom surface fixed to the top end of the monopile foundation (6); and / or, The float (4) is a metal component.

9. The wind power foundation as described in any one of claims 1-7, characterized in that, The wind power foundation also includes a stay cable (7), one end of which is connected to the jacket (3), and the other end is used to connect to the ground.

10. The wind power foundation as described in any one of claims 1-7, characterized in that, The wind power foundation is applicable to offshore wind power foundations, and the top part of the jacket (3) is used to be set above the sea surface.

Images