Floating type wind turbine generator mooring system

Abstract

The invention provides a floating type wind turbine generator mooring system, and relates to the technical field of wind power generation. The floating type wind turbine generator mooring system comprises a wind turbine generator mooring device. The wind turbine generator mooring device comprises a wind turbine generator, a first mooring assembly, a plurality of second mooring assemblies and a plurality of mooring lines. The multiple second mooring assemblies are arranged around the periphery of the wind turbine generator, each second mooring assembly comprises a second anchor pile, a second tension leg and a floating body, and the second anchor piles are fixed to the mud surface; the floating body is located over the second anchor pile, and the second tension leg is elastically connected between the second anchor pile and the floating body. The mooring line is connected to the wind turbine generator and the floating body. The invention provides a floating type wind turbine generator mooring system. The stability and reliability of a floating type wind turbine generator can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind power generation, in particular to a mooring system of a floating wind turbine. BACKGROUND

[0002] The mooring system of the floating wind turbine is mainly used for fixing the position of the floating wind turbine and ensuring its stability. The traditional mooring system includes catenary mooring, taut mooring and tension leg mooring, and usually one set of mooring system corresponds to one floating wind turbine, and one mooring cable in the mooring system is matched with one pile anchor, and the two ends of the mooring cable are connected to the wind turbine and the pile anchor respectively.

[0003] However, under the action of wave load, the horizontal load borne by the floating wind turbine is usually much larger than the vertical load, and the existing mooring system has a large included angle with the waterline, which limits the stability and reliability of the floating wind turbine in complex sea conditions to a certain extent. SUMMARY

[0004] In order to solve at least one problem mentioned in the background, the present application provides a mooring system of a floating wind turbine, which can improve the stability and reliability of the floating wind turbine.

[0005] In order to achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] The present application provides a mooring system of a floating wind turbine, which comprises a wind turbine mooring device, and the wind turbine mooring device comprises:

[0007] The wind turbine is floating on the water surface and is used for wind power generation;

[0008] A plurality of second mooring assemblies are arranged around the periphery of the wind turbine, and the second mooring assembly comprises a second anchor pile, a second tension leg and a float, the second anchor pile is fixed to the mud surface, the float is floating on the water surface and is located directly above the second anchor pile, one end of the second tension leg is elastically connected to the second anchor pile, and the other end is elastically connected to the float;

[0009] A plurality of mooring lines are connected to the wind turbine at one end and to the float at the other end.

[0010] As an optional embodiment, the wind turbine mooring device further comprises a first mooring assembly, the first mooring assembly comprises a first tension leg and a first anchor pile, the first anchor pile is fixed to the mud surface and is located directly below the wind turbine, one end of the first tension leg is elastically connected to the first anchor pile, and the other end is elastically connected to the wind turbine, and the second anchor piles in the plurality of second mooring assemblies are arranged around the periphery of the first anchor pile.

[0011] As an optional embodiment, the mooring line is connected between the wind turbine and the float by catenary or taut.

[0012] As an optional implementation, at least two mooring lines are connected between the wind turbine generator and the floating body.

[0013] As an optional implementation, the plurality of second mooring assemblies are evenly arranged around the periphery of the wind turbine generator.

[0014] As an optional implementation, the wind turbine generator mooring device has a plurality of second mooring assemblies, and at least two wind turbine generator mooring devices of the plurality of wind turbine generator mooring devices share one second mooring assembly.

[0015] As an optional implementation, the wind turbine generator includes a wind turbine and a foundation, the foundation floats on the water surface, the wind turbine is installed on the foundation, the first tension leg is elastically connected to the bottom of the foundation, and the mooring line is connected to the side of the foundation.

[0016] As an optional implementation, the floating body and the foundation are located at the same horizontal level.

[0017] As an optional implementation, the floating body is a pontoon, a buoy or a float.

[0018] As an optional implementation, the mooring line is made of steel or polyester fiber.

[0019] The floating wind turbine generator mooring system provided in the application includes a wind turbine generator mooring device, the wind turbine generator mooring device includes a wind turbine generator, a plurality of second mooring assemblies and a plurality of mooring lines, the wind turbine generator floats on the water surface and is used for wind power generation, the plurality of second mooring assemblies are arranged around the periphery of the wind turbine generator, the second mooring assembly includes a second anchor pile, a second tension leg and a floating body, the second anchor pile is fixed to the mud surface, the floating body floats on the water surface and is located directly above the second anchor pile, one end of the second tension leg is elastically connected to the second anchor pile, and the other end is elastically connected to the floating body, and one end of the mooring line is connected to the wind turbine generator and the other end is connected to the floating body.

[0020] The floating wind turbine generator mooring system provided in the application includes a wind turbine generator mooring device, the wind turbine generator mooring device includes a wind turbine generator, a plurality of second mooring assemblies and a plurality of mooring lines. The plurality of second mooring assemblies are arranged around the periphery of the wind turbine generator, the second anchor pile in each second mooring assembly is fixed to the mud surface, the floating body floats directly above the second anchor pile, the second tension leg connects the second anchor pile and the floating body, and provides vertical and horizontal constraints for the floating body, one end of the mooring line is connected to the wind turbine generator and the other end is connected to the floating body, thereby reducing the included angle between the mooring line and the horizontal direction and simultaneously exerting horizontal restoring force on the wind turbine generator from all directions around the wind turbine generator. In this way, the horizontal restoring force of the wind turbine generator can be greatly improved, and the stability and reliability of the floating wind turbine generator in complex sea conditions can be effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to describe the technical solutions of the embodiments of the present application or the prior art more clearly, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0022] Figure 1 The first schematic diagram of the floating wind turbine mooring system provided by the embodiments of the present application;

[0023] Figure 2 The second schematic diagram of the floating wind turbine mooring system provided by the embodiments of the present application;

[0024] Figure 3 The third schematic diagram of the floating wind turbine mooring system provided by the embodiments of the present application;

[0025] Figure 4 The fourth schematic diagram of the floating wind turbine mooring system provided by the embodiments of the present application.

[0026] Explanation of reference signs:

[0027] 100 - floating wind turbine mooring system;

[0028] 110 - wind turbine;

[0029] 111 - wind machine;

[0030] 112 - foundation;

[0031] 120 - first mooring assembly;

[0032] 121 - first tension leg;

[0033] 122 - first anchor;

[0034] 130 - second mooring assembly;

[0035] 131 - second anchor;

[0036] 132 - second tension leg;

[0037] 133 - float;

[0038] 140 - mooring line. DETAILED DESCRIPTION

[0039] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts are within the scope of the present application.

[0040] In the application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0041] In addition, in addition to indicating the orientation or positional relationship, the above-mentioned terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. Those of ordinary skill in the art can understand the specific meaning of these terms in the present application according to the specific situation.

[0042] In addition, the terms "mount", "set", "provided with", "connected", "connected" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. Those of ordinary skill in the art can understand the specific meaning of the above-mentioned terms in the present application according to the specific situation.

[0043] In addition, the terms "first", "second", and the like are mainly used to distinguish different devices, elements or components (the specific types and structures can be the same or different), and are not intended to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of "multiple" is two or more.

[0044] The mooring system of the floating wind turbine is mainly used to fix the position of the floating wind turbine and ensure its stability. Under the action of wave load, the horizontal load on the floating wind turbine is often much larger than the vertical load. The existing mooring system has a large angle with the waterline, which limits the stability and reliability of the floating wind turbine in complex sea conditions to a certain extent.

[0045] In view of this, the application provides a floating wind turbine mooring system, which comprises a wind turbine mooring device, the wind turbine mooring device comprising a wind turbine, a plurality of second mooring assemblies and a plurality of mooring lines, the wind turbine floating on the water surface and used for wind power generation; the plurality of second mooring assemblies are arranged around the periphery of the wind turbine, each second mooring assembly comprising a second anchor pile, a second tension leg and a float, the second anchor pile being fixed to the mud surface, the float floating on the water surface and located directly above the second anchor pile, one end of the second tension leg being elastically connected to the second anchor pile and the other end being elastically connected to the float; one end of each mooring line is connected to the wind turbine and the other end is connected to the float. The plurality of second mooring assemblies are arranged around the periphery of the wind turbine, the second anchor pile in each second mooring assembly is fixed to the mud surface, the float floats directly above the second anchor pile, the second tension leg connects the second anchor pile and the float to provide vertical and horizontal constraints on the float, one end of each mooring line is connected to the wind turbine and the other end is connected to the float, thereby reducing the included angle between the mooring line and the horizontal direction and exerting horizontal restoring force on the wind turbine from all directions around the wind turbine. In this way, the horizontal restoring force of the wind turbine can be greatly improved, and the stability and reliability of the floating wind turbine in complex sea conditions can be effectively improved.

[0046] Figure 1 The first schematic diagram of the floating wind turbine mooring system provided by the embodiment of the application; Figure 2 The second schematic diagram of the floating wind turbine mooring system provided by the embodiment of the application;

[0047] Figure 3 The third schematic diagram of the floating wind turbine mooring system provided by the embodiment of the application; Figure 4 The fourth schematic diagram of the floating wind turbine mooring system provided by the embodiment of the application. For reference Figures 1 to 4 The embodiment of the application provides a floating wind turbine mooring system 100, which comprises a wind turbine mooring device, the wind turbine mooring device comprising:

[0048] a wind turbine 110 floating on the water surface and used for wind power generation;

[0049] a plurality of second mooring assemblies 130 arranged around the periphery of the wind turbine 110, each second mooring assembly 130 comprising a second anchor pile 131, a second tension leg 132 and a float 133, the second anchor pile 131 being fixed to the mud surface, the float 133 floating on the water surface and located directly above the second anchor pile 131, one end of the second tension leg 132 being elastically connected to the second anchor pile 131 and the other end being elastically connected to the float 133;

[0050] a plurality of mooring lines 140, one end of each mooring line 140 being connected to the wind turbine 110 and the other end being connected to the float 133.

[0051] The floating wind turbine mooring system 100 provided by the present application comprises a wind turbine mooring device, which comprises a wind turbine 110, a plurality of second mooring assemblies 130 and a plurality of mooring lines 140. The plurality of second mooring assemblies 130 are arranged around the periphery of the wind turbine 110, the second anchor 131 in each second mooring assembly 130 is fixed to the seabed, the floating body 133 floats directly above the second anchor 131, the second tension leg 132 connects the second anchor 131 and the floating body 133 to provide vertical and horizontal constraints for the floating body 133, and the mooring line 140 is connected at one end to the wind turbine 110 and at the other end to the floating body 133 to reduce the angle between the mooring line 140 and the horizontal direction and simultaneously exert a horizontal restoring force on the wind turbine 110 from all directions around the wind turbine 110. In this way, the horizontal restoring force of the wind turbine 110 can be greatly improved, and the stability and reliability of the floating wind turbine 110 in complex sea conditions can be effectively improved.

[0052] In the above embodiment, the wind turbine mooring device further comprises a first mooring assembly 120, which comprises a first tension leg 121 and a first anchor 122. The first anchor 122 is fixed to the seabed and located directly below the wind turbine 110, and one end of the first tension leg 121 is elastically connected to the first anchor 122 and the other end is elastically connected to the wind turbine 110. The second anchors 131 in the plurality of second mooring assemblies 130 are arranged around the periphery of the first anchor 122. In the first mooring assembly 120, the first anchor 122 is fixed to the seabed and located directly below the wind turbine 110, one end of the first tension leg 121 is elastically connected to the first anchor 122 and the other end is elastically connected to the wind turbine 110. When the wind turbine 110 is displaced under the action of wave loads, the first tension leg 121 can rely on its elastic properties to support and reset the wind turbine 110 in the vertical direction, while resisting the load in the horizontal direction to some extent and providing a horizontal restoring force. In this way, the first mooring assembly 120 and the second mooring assembly 130 cooperate with each other to greatly improve the horizontal restoring force of the wind turbine 110, and further improve the stability and reliability of the floating wind turbine 110 in complex sea conditions.

[0053] In the above embodiments, the mooring lines 140 are connected between the wind turbine 110 and the floating body 133 in a catenary or a taut mode. When the mooring lines 140 are connected in the catenary mode, the mooring lines 140 naturally sag to form a catenary shape and generate a certain tension by relying on their own gravity. In this mode, when the wind turbine 110 is displaced due to wave loads, the catenary (mooring line 140) can provide a restoring force through shape adjustment, and because the floating body 133 is on the water surface outside the wind turbine 110, the mooring line 140 has a small angle with the horizontal direction, and the horizontal component force accounts for a high proportion, which can better resist horizontal loads. The taut mode is to pull the mooring lines 140 tight so that the mooring lines 140 are in a tense state. In this way, the mooring lines 140 can more directly and quickly respond to the displacement of the wind turbine 110, and when resisting horizontal loads, the mooring lines 140 can rely on the tense state to provide stronger constraints to the wind turbine 110, exerting horizontal restoring forces on the wind turbine 110 from all directions, which helps to improve the stability and reliability of the floating wind turbine 110 in complex sea conditions.

[0054] In the above embodiments, at least two mooring lines 140 are connected between the wind turbine 110 and the floating body 133. It can be understood that the at least two mooring lines 140 can form a more balanced tension distribution between the wind turbine 110 and the floating body 133, avoiding excessive stretching or damage of a single mooring line 140 due to force concentration, and improving the overall carrying capacity of the mooring system. At the same time, the at least two mooring lines 140 can exert horizontal tension on the wind turbine 110 from different directions. When the wind turbine 110 is horizontally displaced in any direction under the action of wave, wind and other loads, the mooring line 140 in the corresponding direction can quickly provide a restoring force through tension changes, cooperate with the catenary or taut connection mode, further reduce the angle between the mooring line 140 and the horizontal direction, and make the horizontal component force more efficiently play a role, so as to cooperate with the first mooring assembly 120 and the second mooring assembly 130 to more comprehensively resist horizontal loads and enhance the stability of the wind turbine 110. In addition, this arrangement also provides a certain redundancy. When one of the mooring lines 140 breaks, the remaining mooring lines 140 can still function to ensure that the mooring system does not fail due to damage to a single mooring line 140, continues to maintain the stability of the wind turbine 110, and reduces the safety risks caused by the failure of the mooring line 140.

[0055] In the above embodiment, the plurality of second mooring assemblies 130 are evenly distributed around the periphery of the wind turbine generator 110. The evenly distributed plurality of second mooring assemblies 130 can make the wind turbine generator 110 transmit the tension of the mooring lines 140 in all directions synchronously and symmetrically when subjected to horizontal loads such as waves and wind in any direction, so as to avoid excessive stretching of the mooring lines 140 or excessive yawing of the wind turbine generator 110 due to force concentration in a certain direction. For example, when the wind turbine generator 110 deviates to one side, the corresponding second mooring assembly 130 can quickly apply a restoring force through the mooring line 140, while the symmetrically arranged assembly can reduce the redundant consumption of reverse pulling through tension balance, so as to make the horizontal restoring force more efficiently act on the wind turbine generator 110, cooperate with the small angle advantage brought by the catenary or tension connection, and make the horizontal force more balanced. The evenly distributed plurality of second mooring assemblies 130 can make the force of each mooring line 140 more uniform, thereby reducing the load of a single cable; and when a plurality of wind turbine generators 110 share the second mooring assembly 130, the evenly distributed assemblies can more reasonably share the load of different units, thereby avoiding overloading of local assemblies due to too many serviced units.

[0056] In the above embodiment, the wind turbine generator mooring device has a plurality of wind turbine generator mooring devices, and at least two wind turbine generator mooring devices of the plurality of wind turbine generator mooring devices share one second mooring assembly 130. Among the shared second mooring assembly 130, the second anchor 131, the second tension leg 132 and the floating body 133 can simultaneously provide connection fulcrums for the mooring lines 140 of the plurality of wind turbine generators 110, so that a single second mooring assembly 130 can radiate outward from the center to provide horizontal constraint and restoring force for the plurality of wind turbine generators 110, cooperate with the first mooring assembly 120 of each wind turbine generator 110, ensure that each wind turbine generator 110 can obtain sufficient horizontal restoring force, and reduce the overall number of second mooring assemblies 130, thereby reducing the construction cost of the sea anchor and the sea area occupation area, and realizing efficient use of resources.

[0057] In the above embodiment, the wind turbine 110 includes a wind turbine 111 and a foundation 112, the foundation 112 is floating on the water surface, the wind turbine 111 is installed on the foundation 112, the first tension leg 121 is elastically connected to the bottom of the foundation 112, and the mooring line 140 is connected to the side of the foundation 112. Among them, the first tension leg 121 is elastically connected to the bottom of the foundation 112, because the foundation 112 is a floating carrier of the wind turbine 110, its bottom is directly connected to the first tension leg 121 located directly below, which can make the elastic support force of the first tension leg 121 more directly act on the load-bearing main body of the entire wind turbine 110, when the foundation 112 fluctuates in the vertical direction or deviates in the horizontal direction due to wave load, the first tension leg 121 can quickly apply vertical restoring force and horizontal constraint force to the foundation 112 through elastic deformation, reduce the additional vibration of the wind turbine 111 due to the shaking of the foundation 112, and ensure the stability of the operation of the wind turbine 111. At the same time, the mooring line 140 is connected to the side of the foundation 112, the connection position design is matched with the floating posture of the foundation 112, which can further optimize the stress angle of the mooring line 140, the side connection makes the mooring line 140 extend from the side of the foundation 112 to the peripheral floating body 133, compared with the connection on the top or bottom, it is easier to reduce the included angle with the horizontal direction, so that the horizontal component force is more efficiently transmitted to the foundation 112, when the foundation 112 deviates in any direction, the mooring line 140 connected to the side can quickly pull the foundation 112 back to position through the change of tension, combined with the second mooring assembly 130 uniformly distributed, forming a symmetrical tension net from multiple sides around the foundation 112, avoiding the foundation 112 tilting due to excessive unilateral stress, and comprehensively improving the anti-deviation ability and overall stability of the wind turbine 110 in complex sea conditions.

[0058] In the above embodiment, the floating body 133 and the foundation 112 are at the same horizontal level. It can be understood that when the floating body 133 and the foundation 112 are at the same horizontal level, the mooring line 140 is connected between the side edge of the foundation 112 and the floating body 133, and can exert a pulling force in a nearly horizontal posture, greatly reducing the included angle between the mooring line 140 and the horizontal plane. According to the principle of force decomposition, the smaller the included angle, the higher the proportion of the horizontal restoring force generated by the mooring line 140, which can more efficiently resist the horizontal displacement of the wind turbine 110 under the action of waves and wind, and further improve the horizontal constraint capability of the wind turbine 110. Secondly, this layout at the same horizontal level can also make the force transmission between the floating body 133 and the foundation 112 more direct and smooth. When the wind turbine 110 deviates, the floating body 133 can quickly feed back the pulling force to the foundation 112 through the mooring line 140, reduce the loss and delay in the force transmission process, and cooperate with the vertical supporting and resetting action of the first tension leg 121 to quickly form bidirectional constraint forces in the horizontal and vertical directions, thereby stabilizing the posture of the wind turbine 110. In addition, this design can also cooperate with the layout of the second mooring assembly 130 around the wind turbine 110, and the mooring lines 140 in each direction can exert force on the same horizontal plane, thereby avoiding uneven pulling force caused by height difference, and further enhancing the stability of the wind turbine 110 in complex sea conditions. At the same time, the floating body 133 and the foundation 112 at the same horizontal level also facilitate installation and maintenance, thereby reducing the installation difficulty and later maintenance complexity of the mooring system, and improving the practicability of the overall system.

[0059] In the above embodiment, the floating body 133 is a pontoon, a floating ball or a floating box. The floating body 133 adopts the form of a pontoon, a floating ball or a floating box, which can not only meet the core functional requirement of floating on the water surface, but also be flexibly adapted according to the actual sea conditions, load size and installation scene, thereby further improving the practicability and stability of the mooring system.

[0060] In the above embodiment, the mooring line 140 is made of steel or polyester fiber. It can be understood that these two materials not only meet the core requirements of strength and toughness of the mooring system, but also form synergy through material properties and overall structure design, thereby further improving the stability and adaptability of the system.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A floating wind turbine mooring system (100), characterized in that: The mooring device for a wind turbine generator set comprises: A wind turbine (110) floats on the water surface and is used for generating wind power; A plurality of second mooring assemblies (130) are arranged around the periphery of the wind turbine (110), the second mooring assemblies (130) comprising a second anchor pile (131), a second tension leg (132) and a floating body (133), the second anchor pile (131) being fixed to the mud surface, the floating body (133) floating on the water surface and being located directly above the second anchor pile (131), one end of the second tension leg (132) being elastically connected to the second anchor pile (131), and the other end being elastically connected to the floating body (133); A plurality of mooring lines (140), one end of each mooring line (140) is connected to the wind turbine generator set (110), and the other end is connected to the floating body (133).

2. The floating wind turbine mooring system (100) according to claim 1, characterized in that: The wind turbine mooring device further comprises a first mooring assembly (120), wherein the first mooring assembly (120) comprises a first tension leg (121) and a first anchor pile (122), wherein the first anchor pile (122) is fixed to the mud surface and is located directly below the wind turbine (110), wherein one end of the first tension leg (121) is elastically connected to the first anchor pile (122), and the other end is elastically connected to the wind turbine (110), and the second anchor piles (131) in the plurality of second mooring assemblies (130) are arranged around the periphery of the first anchor pile (122).

3. The floating wind turbine mooring system (100) according to claim 2, characterized in that: The mooring line (140) is connected between the wind turbine generator set (110) and the floating body (133) in a catenary or tensioning manner.

4. The floating wind turbine mooring system (100) according to claim 3, characterized in that: At least two mooring lines (140) are connected between the wind turbine generator set (110) and the floating body (133).

5. The floating wind turbine mooring system (100) according to claim 4, characterized in that: A plurality of second mooring components (130) are evenly arranged around the periphery of the wind turbine generator set (110).

6. The floating wind turbine mooring system (100) according to claim 5, characterized in that: There are a plurality of wind turbine mooring devices, and at least two of the plurality of wind turbine mooring devices share one second mooring component (130).

7. The floating wind turbine mooring system (100) according to claim 6, characterized in that: The wind turbine generator set (110) comprises a wind turbine (111) and a foundation (112), wherein the foundation (112) floats on the water surface, the wind turbine (111) is installed on the foundation (112), the first tension leg (121) is elastically connected to the bottom of the foundation (112), and the mooring line (140) is connected to the side of the foundation (112).

8. The floating wind turbine mooring system (100) according to claim 7, characterized in that: The floating body (133) and the foundation (112) are located at the same level.

9. The floating wind turbine mooring system (100) according to any one of claims 1 to 8, characterized in that: The floating body (133) is a buoy, a floating ball or a floating box.

10. The floating wind turbine mooring system (100) according to any one of claims 1 to 8, characterized in that: The mooring line (140) is made of steel or polyester fiber.

Images