Installation method of offshore wind generating set

Abstract

The invention relates to a mounting method of an offshore wind generating set, which comprises the following steps: providing a butt joint device, movably fixing the butt joint device on a floating foundation, and enabling the butt joint device to comprise an annular body and a butt joint cavity penetrating through the annular body; a compensation device is connected to the lifting appliance, and the lifting appliance is connected with a lifted object through the compensation device; the supporting tower barrel is hoisted through the compensation device, and the supporting tower barrel is inserted into the butt joint cavity and connected with the floating foundation; the butt joint device is moved to the end, away from the floating foundation, of the supporting tower barrel in the axial direction of the supporting tower barrel and movably fixed to the outer wall of the supporting tower barrel; and the power generation assembly is hoisted through the compensation device, the power generation assembly comprises an impeller, a cabin and a connecting tower cylinder connected with the cabin, and the connecting tower cylinder is inserted into the butt joint cavity and connected with the supporting tower cylinder. According to the scheme, direct installation operation of the wind generating set on the sea can be achieved, the offshore installation condition is adapted, the installation capacity of the offshore generating set is improved, and the installation cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation, and in particular to an installation method of an offshore wind power generator set. Background Art

[0002] With the continuous maturity of offshore wind power technology, offshore wind turbines are gradually developing towards larger capacity. At the same time, as the offshore project areas gradually become saturated with development, offshore wind power projects are gradually developing towards the deep sea.

[0003] At present, the construction process of offshore floating units is mainly to assemble the wind turbines onto the floating foundation by crane at the dock, and then transport them to the offshore machine site by wet dragging, and then fix them to complete the installation of the offshore wind turbine generator set.

[0004] However, for large-capacity units, the weight and height of the units will increase. There is currently no larger and more suitable crane on the market that can assemble large-capacity units at the dock. Even if the crane resources exist, the carrying capacity of the dock is very limited and cannot bear the lifting work of large-load units. Therefore, the installation work of large-capacity offshore units needs to be improved. Summary of the invention

[0005] The embodiment of the present invention provides an installation method for an offshore wind turbine generator set, which can realize direct installation operations of the wind turbine generator set at sea, adapt to offshore installation conditions, improve the installation capacity of the offshore unit, and reduce the installation cost.

[0006] According to an embodiment of the present invention, a method for installing an offshore wind turbine generator set is provided, comprising:

[0007] A docking device is provided, and the docking device is movably fixed on the floating foundation, wherein the docking device comprises an annular body and a docking cavity penetrating the docking device;

[0008] A compensating device is connected to the sling, and the sling is connected to the hoisted object through the compensating device. The compensating device includes a fixing mechanism and an adjusting mechanism. The adjusting mechanism is arranged on the fixing mechanism and is configured to be movable relative to the fixing mechanism to absorb the shaking of the hoisted object.

[0009] The supporting tower is hoisted by using the compensation device, and the supporting tower is inserted into the docking cavity and connected to the floating foundation;

[0010] The docking device is moved along the axial direction of the supporting tower to an end of the supporting tower away from the floating foundation and is movably fixed to the outer wall of the supporting tower;

[0011] The compensating device is used to hoist the power generation assembly, which includes an impeller, a nacelle and a connecting tower connected to the nacelle. The connecting tower is inserted into the docking cavity and connected to the supporting tower.

[0012] According to one aspect of an embodiment of the present invention, the support tower barrel includes a plurality of tower barrel segments. The steps of hoisting the support tower barrel by using a compensation device, inserting the support tower barrel into the docking cavity and connecting it to the floating foundation include:

[0013] Hoist the first tower barrel segment by using a compensation device, insert the first tower barrel segment into the docking cavity and connect it to the floating foundation;

[0014] Move the docking device axially to the end of the first tower barrel segment away from the floating foundation and fix it;

[0015] Hoist the second tower barrel segment by using a compensation device, insert the second tower barrel segment into the docking cavity and connect it to the first tower barrel segment;

[0016] Repeat the above steps to hoist the remaining tower barrel segments until all the tower barrel segments are connected to each other to obtain the support tower barrel.

[0017] According to one aspect of an embodiment of the present invention, the docking device includes a limiting body. The limiting body is arranged at one end of the annular body and protrudes towards the docking cavity. The limiting body is provided with a limiting protrusion. The tower barrel segment includes a connecting plate protruding from the outer wall, and the connecting plate is provided with a connecting hole;

[0018] The steps of hoisting the second tower barrel segment by using a compensation device, inserting the second tower barrel segment into the docking cavity and connecting it to the first tower barrel segment include: docking the connecting plate of the second tower barrel segment to the limiting body and inserting the limiting protrusion into the connecting hole so that the limiting body supports the second tower barrel segment.

[0019] According to one aspect of an embodiment of the present invention, the docking device includes a telescopic assembly. One end of the telescopic assembly is connected to the limiting body and the other end is connected to the annular body;

[0020] After the step of docking the connecting plate of the second tower barrel segment to the limiting body and inserting the limiting protrusion into the connecting hole so that the limiting body supports the second tower barrel segment, it further includes: controlling the telescopic assembly to contract towards the docking cavity to drive the limiting body and the second tower barrel segment to move towards the first tower barrel segment until the two are docked.

[0021] According to one aspect of an embodiment of the present invention, the docking device includes a rotating member. The rotating member is arranged at one end of the annular body and is connected to the limiting body;

[0022] Before the step of docking the connecting plate of the second tower barrel segment to the limiting body and inserting the limiting protrusion into the connecting hole so that the limiting body supports the second tower barrel segment, it further includes: controlling the rotating member to rotate circumferentially along the first tower barrel segment to drive the limiting body to rotate until the docking reference line of the limiting body matches the docking reference line of the first tower barrel segment.

[0023] According to one aspect of an embodiment of the present invention, the compensation device includes a rotating member connected to the adjustment mechanism and configured to drive the adjustment mechanism to rotate;

[0024] The steps of hoisting the second tower section by using the compensation device, inserting the second tower section into the docking cavity and connecting it with the first tower section include: using the rotating member to drive the adjustment mechanism to rotate to drive the second tower section to rotate until the docking reference line of the second tower section matches the docking reference line of the first tower section.

[0025] According to one aspect of the embodiments of the present invention, the docking device includes a locking member, which is disposed on the annular body;

[0026] The step of moving the docking device along the axial direction of the supporting tower to an end of the supporting tower away from the floating foundation and fixing it comprises: fixing the docking device on the supporting tower by using a locking piece.

[0027] According to one aspect of the embodiment of the present invention, the locking member includes a fixing pin, and the outer wall of the supporting tower is provided with a movable guide rail, and the movable guide rail is provided with a positioning hole;

[0028] The step of moving the docking device along the axial direction of the supporting tower to the end of the supporting tower away from the floating foundation and fixing it includes: after moving the docking device along the movable guide rail to the end of the supporting tower away from the floating foundation, using a fixing pin to be inserted into the positioning hole to fix the docking device on the supporting tower.

[0029] According to one aspect of an embodiment of the present invention, the annular body includes a first annular body and a second annular body that are movably connected, the first annular body and the second annular body enclose an adjustable docking cavity, and the step of moving the docking device along the axial direction of the supporting tower to an end of the supporting tower away from the floating foundation and fixing it includes:

[0030] The second ring body is fixed and the first ring body is moved axially toward a side gradually away from the second ring body, wherein the space of the docking cavity is adjusted;

[0031] When the first ring body moves to the end of the supporting tower away from the floating foundation, the first ring body is fixed and the second ring body moves axially toward a side gradually approaching the first ring body;

[0032] When the second ring body moves to the end of the supporting tower away from the floating foundation, the second ring body is fixed and enclosed with the first ring body to form an adjusted docking cavity.

[0033] According to one aspect of an embodiment of the present invention, the compensation device includes a sling, which is connected to an adjustment mechanism and has an adjustable position on the adjustment mechanism. The steps of slinging the support tower using the compensation device, inserting the support tower into the docking cavity and connecting it to the floating foundation include:

[0034] Adjust the position of the sling relative to the adjusting mechanism so that the sling and the supporting tower barrel have the same extension direction;

[0035] Connect the sling to the supporting tower barrel and lift the supporting tower barrel.

[0036] According to one aspect of the embodiments of the present invention, before the step of inserting the connecting tower barrel into the docking cavity and connecting it to the supporting tower barrel when hoisting the power generation assembly by using the compensation device, it further includes:

[0037] Provide an installation platform, and installation columns are arranged on the installation platform;

[0038] Lift the machine head onto the installation column. The machine head includes a nacelle, a hub connected to the nacelle, and a connecting tower barrel. The machine head is connected to the installation column through the connecting tower barrel;

[0039] Lift multiple blades onto the hub to obtain an impeller.

[0040] According to one aspect of the embodiments of the present invention, a plurality of connection ports are arranged on the hub. The step of lifting multiple blades onto the hub to obtain an impeller includes:

[0041] Rotate the hub so that the opening of any one of the connection ports faces the horizontal direction;

[0042] Lift any one blade horizontally to the connection port;

[0043] Repeat the above process to lift each of the multiple blades to multiple connection ports.

[0044] According to one aspect of the embodiments of the present invention, the machine head further includes a yaw system. The machine head is connected to the installation column through the yaw system. After the step of lifting multiple blades onto the hub to obtain an impeller, it further includes: rotating the nacelle and the impeller by using the yaw system. The impeller has a hoisting space.

[0045] An embodiment of the present invention provides an installation method for an offshore wind turbine generator. By installing a docking device on a floating foundation, using a compensation device to insert a support tower into the docking cavity of the docking device, and then connecting the support tower to the floating foundation, the docking device can provide a preliminary docking position for the support tower and fix it. At the same time, the compensation device can buffer the hoisting process, overcome the shaking during offshore operations, make the installation process of the support tower more stable, meet the offshore operation environment and installation conditions, and then use the compensation device to hoist the power generation components and also form docking and fixation through the docking device, completing the installation operation of the offshore unit. The cooperation of the docking device and the compensation device improves the stability of the offshore hoisting process, enables the ability to perform hoisting operations offshore, and reduces the risks during the hoisting process. At the same time, performing installation operations offshore also avoids operations at the dock, eliminates the need to replace large cranes and reinforce the dock, and saves installation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The features, advantages, and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0047] Figure 1 is a flowchart of an installation method for an offshore wind turbine generator according to an embodiment of the present invention;

[0048] Figure 2 is a process diagram of an installation method for an offshore wind turbine generator according to an embodiment of the present invention;

[0049] Figure 3 is a process diagram of an installation method for an offshore wind turbine generator according to an embodiment of the present invention;

[0050] Figure 4 is a process diagram of an installation method for an offshore wind turbine generator according to an embodiment of the present invention;

[0051] Figure 5 is a process diagram of an installation method for an offshore wind turbine generator according to an embodiment of the present invention;

[0052] Figure 6 is a process diagram of an installation method for an offshore wind turbine generator according to an embodiment of the present invention;

[0053] Figure 7 is a process diagram of an installation method for an offshore wind turbine generator according to an embodiment of the present invention;

[0054] Figure 8 is a process diagram of an installation method for an offshore wind turbine generator according to an embodiment of the present invention;

[0055] Figure 9 is a process diagram of an installation method for an offshore wind turbine generator according to an embodiment of the present invention;

[0056] Figure 10 is a schematic structural diagram of the docking device according to an embodiment of the present invention;

[0057] Figure 11 is a schematic structural diagram of the compensation device according to an embodiment of the present invention.

[0058] Reference numerals:

[0059] 100 - docking device; 200 - floating foundation; 300 - compensation device; 400 - sling; 500 - support tower barrel; 501 - first tower barrel section; 502 - second tower barrel section; 600 - blade; 700 - nacelle; 800 - connecting tower barrel;

[0060] 10 - annular body; 11 - first ring body; 12 - second ring body; 20 - fixing mechanism; 30 - adjusting mechanism; 40 - limiting body; 41 - limiting protrusion;

[0061] 50 - telescopic assembly; 60 - rotating member; 70 - rotating member; 80 - locking member; 90 - suspension cable;

[0062] 1 - installation platform; 2 - installation column.

[0063] In the drawings, the same components are denoted by the same reference numerals. The drawings are not drawn to actual scale. Detailed implementation manners

[0064] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, many specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present invention by showing examples of the present invention. In the drawings and the following description, at least some of the well-known structures and technologies are not shown in order to avoid unnecessarily obscuring the present invention; and, for clarity, the dimensions of some structures may be exaggerated. In addition, the features, structures, or characteristics described below may be combined in any suitable manner in one or more embodiments.

[0065] The directional terms appearing in the following description are all the directions shown in the drawings, and do not limit the installation method of the offshore wind turbine generator of the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected or indirectly connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0066] In order to better understand the present invention, Figures 1 to 11 The installation method of an offshore wind turbine generator set according to an embodiment of the present invention is described in detail.

[0067] See also Figure 1 According to an embodiment of the present invention, a method for installing an offshore wind turbine generator set is proposed, comprising:

[0068] S1. Provide a docking device 100, and movably fix the docking device 100 on a floating foundation 200, wherein the docking device 100 includes a ring-shaped body 10 and a docking cavity penetrating the ring-shaped body;

[0069] S2. Connect the compensation device 300 to the sling 400. The sling 400 is connected to the hoisted object through the compensation device 300. The compensation device 300 includes a fixing mechanism 20 and an adjusting mechanism 30. The adjusting mechanism 30 is disposed on the fixing mechanism 20 and is configured to be movable relative to the fixing mechanism 20 to absorb the shaking of the hoisted object.

[0070] S3, using the compensation device 300 to hoist the supporting tower 500, inserting the supporting tower 500 into the docking cavity and connecting it to the floating foundation 200;

[0071] S4, moving the docking device 100 along the axial direction of the support tower 500 to the end of the support tower 500 away from the floating foundation 200 and movably fixing it to the outer wall of the support tower 500;

[0072] S5. Use the compensation device 300 to hoist the power generation assembly, which includes an impeller, a nacelle 700 and a connecting tower 800 connected to the nacelle 700. Insert the connecting tower 800 into the docking cavity and connect it to the supporting tower 500.

[0073] like Figure 2 As shown, in step S1, it is first necessary to provide a docking device 100. The docking device 100 is a ring-shaped body 10 structure, which itself has a docking cavity. The docking cavity is an annular cavity structure, and its function is to accommodate the tower structure. During the installation process, the end of the tower can be preliminarily fixed.

[0074] It can be understood that the radial dimension of the annular body 10 of the docking device 100 is greater than the radial dimension of the tower, so that during the process of hoisting and docking, the tower can be smoothly inserted into the annular body 10 of the docking device 100. Optionally, the docking device 100 forms a bolted connection with the flange of the offshore floating foundation 200 through its own annular body 10.

[0075] In step S2, the hook on the lifting tool 400 is used to connect the compensation device 300, and then the compensation device 300 is connected to the lifted object. The main structure of the compensation device 300 has two parts: a fixed mechanism 20 and an adjustment mechanism 30 that are movably connected. The adjustment mechanism 30 can move relative to the fixed mechanism 20. The main function of the compensation device 300 is to use the adjustment mechanism 30 to buffer the shaking during the lifting process.

[0076] Specifically, when strong winds or waves cause shaking during lifting, the adjustment mechanism 30 in the compensation device 300 can automatically move relative to the fixed mechanism 20, thereby replacing the shaking of the lifted object and forming an effective compensation buffer for the shaking, keeping the lifted object in a relatively static state at all times and ensuring the smooth progress of the docking process.

[0077] In the subsequent step S3, the compensation device 300 is used to lift and support the tower barrel 500. When the tower barrel 500 is affected by wind force, the compensation device 300 at this time can absorb the shaking of the tower barrel 500, keeping the tower barrel 500 in a relatively static state during the docking process with the docking device 100 so that it can be accurately docked with the docking device 100.

[0078] Since the docking cavity is an annular cavity, it accommodates the tower barrel 500 during docking and further fixes the end of the tower barrel 500. After gradually inserting the tower barrel 500 into the docking cavity, it is bolted to the floating foundation 200 at the bottom.

[0079] After the tower barrel 500 is connected to the floating foundation 200, in step S4, the docking device 100 at the bottom is continuously lifted until it reaches the top of the tower barrel 500, and at the same time, the docking device 100 is movably fixed on the outer wall of the tower barrel 500 for the next docking.

[0080] Optionally, the docking device 100 can use a pneumatic cylinder structure to move it upward, or other various driving methods can be used. And it can be fixed by abutting against the outer wall of the tower barrel, or it can be fixed by plugging. The present invention does not make special limitations on the moving method and the fixing method of the docking device 100.

[0081] After the installation of the above tower barrel 500 is completed, in step S5, the above compensation device 300 is continued to be used to lift the power generation components, that is, components such as the impeller and the nacelle 700.

[0082] It should be noted that in this step, the connecting tower barrel 800 needs to be pre-installed at the bottom of the nacelle 700, and its purpose is to form a plug-in connection with the docking device 100 on the supporting tower barrel 500, so as to connect the nacelle 700 to the supporting tower barrel 500. The connecting tower barrel 800 mainly plays a role of transfer. This is because it is not convenient to directly hoist the nacelle 700 onto the supporting tower barrel 500. The shell of the nacelle 700 is relatively thin and the docking interface is small, and direct hoisting is likely to cause damage.

[0083] Similarly, under the action of the compensation device 300, the power generation assembly has better stability during hoisting. The compensation device 300 can absorb the shaking during hoisting, keep the power generation assembly in a relatively static state all the time, and ensure a stable docking through the connecting tower barrel 800 and the supporting tower barrel 500.

[0084] Optionally, for the hoisting of the power generation assembly, the impeller and the nacelle 700 therein can be hoisted separately at sea. Of course, it is also possible to pre-install the whole at the dock and then transport the whole to the sea for hoisting.

[0085] The embodiment of the present invention provides an installation method for an offshore wind power generating set. By installing the docking device 100 on the floating foundation 200, inserting the supporting tower barrel 500 into the docking cavity of the docking device 100 by using the compensation device 300, and then connecting the supporting tower barrel 500 to the floating foundation 200, the docking device 100 can provide a preliminary docking position for the supporting tower barrel 500 and fix it. At the same time, the compensation device 300 can buffer the hoisting process, overcome the shaking during offshore operation, make the installation process of the supporting tower barrel 500 more stable, meet the offshore operation environment and installation conditions. Then, use the compensation device 300 to hoist the power generation assembly and also form a docking and fixation through the docking device 100 to complete the installation operation of the offshore unit. The cooperation of the docking device 100 and the compensation device 300 improves the stability of the offshore hoisting process, enables the ability of offshore hoisting operation, and reduces the risk during hoisting. At the same time, carrying out the installation operation offshore also avoids the operation at the dock, avoids the measures of replacing large cranes and strengthening the dock, and saves the installation cost.

[0086] As an optional embodiment, please refer to Figure 2 and Figure 3 , the supporting tower barrel 500 includes a plurality of tower barrel segments. The steps of hoisting the supporting tower barrel 500 by using the compensation device 300, inserting the supporting tower barrel 500 into the docking cavity and connecting it to the floating foundation 200 include:

[0087] S31. Hoist the first tower barrel segment 501 by using the compensation device 300, insert the first tower barrel segment 501 into the docking cavity and connect it to the floating foundation 200;

[0088] S32. Move the docking device 100 axially to the end of the first tower barrel section 501 facing away from the floating foundation 200 and fix it.

[0089] S33. Use the compensation device 300 to hoist the second tower barrel section 502, insert the second tower barrel section 502 into the docking cavity and connect it to the first tower barrel section 501.

[0090] S34. Repeat the above steps to hoist the remaining tower barrel sections until all the tower barrel sections are connected to each other to obtain the support tower barrel 500.

[0091] Optionally, the support tower barrel 500 can be divided into multiple tower barrel sections. When hoisting the support tower barrel 500, multiple tower barrel sections can be transported to the sea and hoisted one by one to obtain the final support tower barrel 500. The present invention does not make special limitations on the number of sections of the support tower barrel 500.

[0092] In step S31, first hoist the first tower barrel section 501. The first tower barrel section 501 needs to be docked with the docking device 100 connected to the floating foundation 200. Similarly, use the compensation device 300 to hoist the first tower barrel section 501 to absorb the sway of the first tower barrel section 501. After inserting it into the docking cavity, it is bolted to the bottom flange on the floating foundation 200.

[0093] At this time, in step S32, continue to move the docking device 100 upward along the axis of the tower barrel until the top of the first tower barrel section 501 and then fix it. The moving method and fixing method of the docking device 100 are the same as those in the above steps and will not be repeated here.

[0094] In step S33, continue to use the compensation device 300 to hoist the second tower barrel section 502, insert it into the docking device 100 at the top of the first tower barrel section 501, and bolt it to the end flange on the first tower barrel section 501. This step is the connection between tower barrel sections.

[0095] Specifically, considering the specific number of tower barrel sections, repeat in step S34 until all the tower barrel sections are connected to obtain the complete support tower barrel 500. During the whole process, the docking device 100 is used to dock with the tower barrel sections to form a preliminary fixation, and at the same time, the compensation device 300 is used for hoisting to absorb the sway until all the tower barrel sections are stably connected.

[0096] The embodiment of the present invention provides an installation method for an offshore wind power generator set. By dividing the support tower barrel 500 into multiple tower barrel sections, it realizes the stable hoisting of each tower barrel section by using the docking device 100 and the compensation device 300. Dividing it into multiple tower barrel sections facilitates the transportation of the tower barrel sections at sea and increases the stability during hoisting.

[0097] As an alternative embodiment, please refer to Figure 3 and in combination with Figure 10 , the docking device 100 includes a limiting body 40. The limiting body 40 is arranged at one end of the annular body 10 and protrudes towards the docking cavity. A limiting protrusion 41 is arranged on the limiting body 40. The tower barrel section includes a connecting plate protruding from the outer wall, and a connecting hole is arranged on the connecting plate;

[0098] The steps of hoisting the second tower barrel section 502 by using the compensation device 300, inserting the second tower barrel section 502 into the docking cavity and connecting it to the first tower barrel section 501 include: docking the connecting plate of the second tower barrel section 502 to the limiting body 40 and inserting the limiting protrusion 41 into the connecting hole, so that the limiting body 40 supports the second tower barrel section 502.

[0099] In this embodiment, a limiting body 40 is arranged in the docking device 100 and a corresponding extended connecting plate is arranged on the outer wall of the tower barrel section. This is because when the tower barrel section is inserted into the docking cavity, the load-bearing capacity of the docking device 100 for the tower barrel section is increased.

[0100] When the second tower barrel section 502 is inserted into the docking cavity, the connecting plate on the side wall of the second tower barrel section 502 abuts against the extended limiting body 40 in the docking device 100 through its own connecting hole. Specifically, the limiting protrusion 41 on the limiting body 40 is inserted into the connecting hole, forming the docking of the connecting plate of the second tower barrel section 502 and the limiting body 40 of the docking device 100, and the limiting body 40 forms a certain support for the second tower barrel section 502.

[0101] After the docking is formed, the bottom flange hole of the second tower barrel section 502 at this time is located below the limiting body 40 in the docking cavity and forms a docking with the top flange hole of the first tower barrel section 501.

[0102] The embodiment of the present invention provides an installation method for an offshore wind power generation unit. By arranging a limiting body 40 in the docking device 100 to abut against the connecting plate on the tower barrel section, the support for the tower barrel section is formed, and the stability during the docking process of the tower barrel section is improved.

[0103] As an alternative embodiment, please refer to Figure 3 and in combination with Figure 10 , the docking device 100 includes a telescopic assembly 50. One end of the telescopic assembly 50 is connected to the limiting body 40 and the other end is connected to the annular body 10;

[0104] After the step of butt - jointing the connecting plate of the second tower barrel section 502 to the limiting body 40 and inserting the limiting protrusion 41 into the connecting hole so that the limiting body 40 supports the second tower barrel section 502, the following steps are further included: controlling the telescopic assembly 50 to contract and move towards the docking cavity, so as to drive the limiting body 40 and the second tower barrel section 502 to move towards the first tower barrel section 501 until the two are butt - jointed.

[0105] In this embodiment, it is mainly considered that after the second tower barrel section 502 is inserted into the docking cavity, there is still a distance between the end flange at the bottom of the second tower barrel section 502 and the end flange at the top of the first tower barrel section 501, resulting in the inability to form a butt - joint between the two. Therefore, a telescopic assembly 50 is provided in the docking device 100 in this embodiment.

[0106] Specifically, the telescopic assembly 50 is connected between the limiting body 40 and the annular body 10, and the telescopic assembly 50 can perform telescopic movement in the axial direction to drive the limiting body 40 to perform relative movement in the axial direction relative to the annular body 10.

[0107] During the hoisting process of the second tower barrel section 502, the connecting plate on the side wall of the second tower barrel section 502 abuts against the limiting body 40 in the docking device 100. Therefore, when the limiting body 40 moves downward following the telescopic assembly 50, it will drive the abutted second tower barrel section 502 to move. After the second tower barrel section 502 moves towards the first tower barrel section 501, it will be butt - jointed with the first tower barrel section 501.

[0108] Optionally, the telescopic assembly 50 can be arranged around the circumference of the tower barrel, so as to be able to uniformly drive the tower barrel section to perform telescopic movement. At the same time, the telescopic assembly 50 can have various structural forms, and the present invention does not make special limitations on the specific structural form of the telescopic assembly 50, as long as it can drive the tower barrel section to move in the axial direction.

[0109] The embodiment of the present invention provides an installation method for an offshore wind power generating set. By arranging a telescopic assembly 50 in the docking device 100, connecting the telescopic assembly 50 between the annular body 10 and the limiting body 40, and using its telescopic performance to drive the tower barrel section abutted against the limiting body 40 to move, the distance between the tower barrel sections can be shortened during the docking process, so that the end flanges of the two can form a full butt - joint, providing guarantee for the subsequent installation of bolts and torque tightening.

[0110] As an alternative embodiment, please refer to Figure 3 and combine with Figure 10 , the docking device 100 includes a rotating member 60, and the rotating member 60 is arranged at one end of the annular body 10 and is connected to the limiting body 40;

[0111] Before the step of docking the connecting plate of the second tower barrel section 502 to the limiting body 40 and inserting the limiting protrusion 41 into the connecting hole so that the limiting body 40 supports the second tower barrel section 502, it further includes: controlling the rotating member 60 to rotate circumferentially along the first tower barrel section 501 to drive the limiting body 40 to rotate until the docking reference line of the limiting body 40 matches the docking reference line of the first tower barrel section 501.

[0112] Optionally, a rotating member 60 is arranged in the docking device 100, and the rotating member 60 is connected to the limiting body 40 so that the limiting body 40 can be rotationally adjusted.

[0113] The purpose of rotationally adjusting the limiting body 40 is to make the docking reference line of the limiting body 40 match the docking reference line of the bottom first tower barrel section 501, so that the docking device 100 moved to the top of the first tower barrel section 501 and the first tower barrel section 501 have the same installation state, thereby providing a basis for the precise docking of the second tower barrel section 502.

[0114] Specifically, before hoisting the second tower barrel section 502, the rotation adjustment is started by using the rotating member 60. The rotating member 60 can drive the limiting body 40 to rotate circumferentially until the limiting body 40 has the same docking reference line as the bottom first tower barrel section 501, and then stop the rotation of the rotating member 60.

[0115] Optionally, the rotating member 60 can adopt different structural forms. For example, it drives a gear ring to rotate through gear transmission, etc. The present invention does not make special limitations on the specific structure of the rotating member 60, as long as it can drive the limiting body 40 to perform rotational adjustment.

[0116] The embodiment of the present invention provides an installation method for an offshore wind turbine generator. By arranging a rotating member 60 in the docking device 100 to drive the limiting body 40 to be rotationally adjustable, the limiting body 40 and the first tower barrel section 501 have matching docking reference lines, providing guarantee for the subsequent precise docking of the second tower barrel section 502 and the first tower barrel section 501.

[0117] As an alternative embodiment, please refer to Figure 3 and combine with Figure 10 , the compensation device 300 includes a rotating member 70. The rotating member 70 is connected to the adjusting mechanism 30 and is configured to drive the adjusting mechanism 30 to rotate;

[0118] The step of using the compensation device 300 to hoist the second tower barrel section 502, inserting the second tower barrel section 502 into the docking cavity and connecting it to the first tower barrel section 501 includes: using the rotating member 70 to drive the adjusting mechanism 30 to rotate to drive the second tower barrel section 502 to rotate until the docking reference line of the second tower barrel section 502 matches the docking reference line of the first tower barrel section 501.

[0119] To match the docking reference line of the second tower barrel section 502 with that of the first tower barrel section 501, optionally, by arranging a rotating member 70 in the compensation device 300, during the hoisting process of the second tower barrel section 502, the rotating member 70 can be used to adjust the docking reference line of the second tower barrel section 502 to match the reference line of the limiting body 40 in the docking device 100, that is, to match the reference line of the first tower barrel section 501, so as to achieve the precise docking of the second tower barrel section 502 and the first tower barrel section 501.

[0120] When hoisting the second tower barrel section 502, the second tower barrel section 502 is connected to the adjusting mechanism 30 in the compensation device 300 through a sling 90. By utilizing the moving characteristic of the adjusting mechanism 30 relative to the fixing mechanism 20, the swaying is buffered. At the same time, the rotating member 70 can drive the adjusting mechanism 30 to rotate, and then drive the second tower barrel section 502 connected thereto to rotate, completing the adjustment of the docking reference line of the second tower barrel section 502 until it matches the first tower barrel section 501.

[0121] Optionally, the rotating member 70 can be rotated in a gear transmission manner and can be arranged at the top of the fixing mechanism 20 and the adjusting mechanism 30, so as to be able to drive the fixing mechanism 20 and the adjusting mechanism 30 to rotate simultaneously. The present invention does not make special limitations on the specific structure and rotation form of the rotating member 70, as long as it can ensure the rotational adjustment of the reference line of the second tower barrel section 502.

[0122] The embodiment of the present invention provides an installation method for an offshore wind power generation unit. By arranging a rotating member 70 in the compensation device 300, the rotational adjustment during the hoisting process of the tower barrel section is realized, so that its docking reference line matches the docking device 100, thereby enabling the smooth and precise docking of the tower barrel section, having better adjustable performance, and providing convenience for the docking process.

[0123] As an alternative embodiment, please refer to Figure 3 and combine with Figure 10 , the docking device 100 includes a locking member 80, and the locking member 80 is arranged on the annular body 10;

[0124] The step of moving the docking device 100 axially along the support tower barrel 500 to the end of the support tower barrel 500 away from the floating foundation 200 and fixing it includes: fixing the docking device 100 on the support tower barrel 500 by using the locking member 80.

[0125] After inserting the support tower barrel 500 into the docking device 100 and connecting it to the floating foundation 200 through bolts, at this time, the docking device 100 has completed the docking task at this position and needs to be moved axially upward along the tower barrel until the top end of the support tower barrel 500.

[0126] In order to fix the docking device 100 on the side wall at the top end of the support tower barrel 500, in this embodiment, the device is locked by the locking member 80. The present invention does not specifically limit the structure of the locking member 80, and it can be a plugging or abutting fixing method.

[0127] The embodiment of the present invention provides an installation method for an offshore wind power generation unit. By arranging the locking member 80 in the docking device 100, it is convenient to fix the docking device 100 after moving the docking device 100 axially, providing guarantee for the subsequent docking process.

[0128] As an alternative embodiment, the locking member 80 includes a fixing pin. There is a moving guide rail on the outer wall of the support tower barrel 500, and positioning holes are arranged on the moving guide rail.

[0129] The step of moving the docking device 100 axially along the support tower barrel 500 to the end of the support tower barrel 500 away from the floating foundation 200 and fixing it includes: after moving the docking device 100 along the moving guide rail to the end of the support tower barrel 500 away from the floating foundation 200, inserting the fixing pin into the positioning hole to fix the docking device 100 on the support tower barrel 500.

[0130] Optionally, a moving guide rail is arranged on the outer wall of the support tower barrel 500. By extending the moving guide rail axially, it provides guidance for the movement of the docking device 100 on the outer wall, making it convenient for the docking device 100 to move and adjust.

[0131] Meanwhile, positioning holes are arranged on the moving guide rail, and the locking member 80 adopts the structural form of a fixing pin. When the docking device 100 moves to the top end of the support tower barrel 500, the fixing pin at this time can be inserted into the positioning hole on the moving guide rail, so as to lock the docking device 100 by plugging, facilitating subsequent docking at this position.

[0132] The embodiment of the present invention provides an installation method for an offshore wind power generation unit. By using the locking method of inserting the fixing pin into the positioning hole, it provides a feasible way for the fixing of the docking device 100, facilitating the realization of automatic fixing and also providing guidance for the movement and adjustment of the docking device 100.

[0133] As an alternative embodiment, please refer to Figure 3 and in combination with Figure 10 , the annular body 10 includes a first ring body 11 and a second ring body 12 that are movably connected. The first ring body 11 and the second ring body 12 enclose an adjustable docking cavity. Locking members 80 are respectively arranged on the first ring body 11 and the second ring body 12. The step of moving the docking device 100 axially along the support tower barrel 500 to the end of the support tower barrel 500 away from the floating foundation 200 and fixing it includes:

[0134] S41. Fix the second ring body 12 and move the first ring body 11 axially towards the side that gradually moves away from the second ring body 12, where the space of the docking cavity is adjusted;

[0135] S42. After the first ring body 11 moves to the end of the support tower barrel 500 away from the floating foundation 200, fix the first ring body 11 and move the second ring body 12 axially towards the side that gradually approaches the first ring body 11;

[0136] S43. After the second ring body 12 moves to the end of the support tower barrel 500 away from the floating foundation 200, fix the second ring body 12 and enclose with the first ring body 11 to form an adjusted docking cavity.

[0137] Optionally, locking members 80 are respectively arranged in the first ring body 11 and the second ring body 12. In step S41, disconnect the locking member 80 of the first ring body 11 from the support tower barrel 500 and connect the locking member 80 of the second ring body 12 to the support tower barrel 500, so as to fix the second ring body 12 on the outer wall of the support tower barrel 500, and the first ring body 11 moves axially towards the side that gradually moves away from the second ring body 12. Since the first ring body 11 and the second ring body 12 move away from each other axially, the space of the docking cavity jointly formed by the two is also adjusted.

[0138] In step S42, after the first ring body 11 moves to the end of the support tower barrel 500 away from the floating foundation 200, connect the locking member 80 of the first ring body 11 to the support tower barrel 500 and disconnect the locking member 80 of the second ring body 12 from the support tower barrel 500, so as to fix the first ring body 11 on the outer wall of the support tower barrel 500, and the second ring body 12 moves axially towards the side that gradually approaches the first ring body 11, and the distance between the two gradually approaches.

[0139] In step S43, after the second ring body 12 moves to the end of the support tower barrel 500 away from the floating foundation 200, connect the locking member 80 of the second ring body 12 to the support tower barrel 500. At this time, the first ring body 11 and the second ring body 12 are jointly fixed at the outer wall of the support tower barrel 500 and are both located at the top of the support tower barrel 500, and jointly enclose a docking cavity therebetween, so that the docking cavity is adjusted, thereby providing a basis for subsequent tower barrel docking.

[0140] Optionally, the first ring body 11 and the second ring body 12 can be connected by a hydraulic cylinder to realize the relative movement between the two ring bodies.

[0141] When the docking device 100 is still at the bottom of the support tower barrel 500, after completing the connection between the support tower barrel 500 and the floating foundation 200, first in step S41, the locking member 80 of the first ring body 11 is opened so that it can move relative to the second ring body 12 on the outer wall of the support tower barrel 500. At this time, the second ring body 12 is still locked at the bottom of the support tower barrel 500.

[0142] Subsequently, it enters step S42. When the first ring body 11 gradually moves to the top of the support tower barrel 500, the locking member 80 of the first ring body 11 fixes it at the top. At this time, the locking member 80 of the second ring body 12 is opened, and under the driving action of the hydraulic cylinder, it moves towards the first ring body 11 at the top. Similarly, after moving to the top of the support tower barrel 500, in step S43, it is fixed at this position by using the locking member 80, thus completing the entire movement process of the docking device 100.

[0143] The embodiment of the present invention provides an installation method for an offshore wind power generation unit. By setting the docking device 100 as the first ring body 11 and the second ring body 12 that are movably connected, the movement adjustment of the docking device 100 is realized by using the relative mobility of the two, so that the docking device 100 has higher stability when moving on the outer wall of the support tower barrel 500.

[0144] As an optional embodiment, please refer to Figure 3 and in combination with Figure 11 , the compensation device 300 includes a sling 90. The sling 90 is connected to the adjusting mechanism 30 and its position on the adjusting mechanism 30 is adjustable. The steps of using the compensation device 300 to hoist the support tower barrel 500, inserting the support tower barrel 500 into the docking cavity and connecting it to the floating foundation 200 include:

[0145] Adjust the position of the sling 90 relative to the adjusting mechanism 30 so that the sling 90 has the same extension direction as the support tower barrel 500;

[0146] Connect the sling 90 to the support tower barrel 500 and hoist the support tower barrel 500.

[0147] In order to further improve the balance stability when hoisting the support tower barrel 500, the position of the sling 90 of the compensation device 300 in this embodiment is adjustable. Optionally, the position of the sling 90 can be adjusted by moving or rotating, and its purpose is to have the same extension direction as the support tower barrel 500 to ensure better balance when hoisting the support tower barrel 500.

[0148] Before connecting with the support tower barrel 500 using the sling 90, adjust the position of the sling 90 on the adjusting mechanism 30. Usually, it is adjusted to a vertically downward state. Optionally, the sling 90 can be connected to the support tower barrel 500 through a sling beam arranged in the middle, thus avoiding direct contact between the sling 90 and the support tower barrel 500 and having better hoisting stability.

[0149] Meanwhile, for support tower barrels 500 of different model sizes, there are different sling attachment points. Therefore, by adjusting the position of the sling 90, it can be ensured that the connection is at the corresponding sling attachment point position, and stable connections can be formed with support tower barrels 500 of different models, having better adaptability.

[0150] The embodiment of the present invention provides an installation method for an offshore wind power generation unit. By making the position of the sling 90 in the compensation device 300 adjustable, it has flexible and diverse adjustment capabilities, can better adapt to different environments, form a more stable connection with the support tower barrel 500, and ensure the balance and stability during the hoisting process.

[0151] As an optional embodiment, please refer to Figures 4 to 9 , before the step of hoisting the power generation component using the compensation device 300 and inserting the connecting tower barrel 800 into the docking cavity and connecting it with the support tower barrel 500, it further includes:

[0152] Provide an installation platform 1, and an installation column 2 is arranged on the installation platform 1;

[0153] Hoist the machine head onto the installation column 2. The machine head includes a nacelle 700 and a hub and a connecting tower barrel 800 connected to the nacelle 700. The machine head is connected to the installation column 2 through the connecting tower barrel 800;

[0154] Hoist a plurality of blades 600 onto the hub to obtain an impeller.

[0155] In this embodiment, it mainly aims at the process of transporting the components in the power generation component to the sea for assembly after disassembly. Specifically, the machine head and a plurality of blades 600 are respectively transported from the dock to the sea and assembled at sea, reducing the pressure of assembly at the dock and the difficulty of transportation at sea.

[0156] First, an installation platform 1 needs to be set up beside the floating foundation 200 at sea. The installation platform 1 is a fixed platform and will not float with the waves. Optionally, the installation platform 1 can be a jack-up platform, and an installation column 2 is arranged on the installation platform 1 to provide support for the subsequent power generation component.

[0157] Lift the nacelle onto the installation column 2 and connect it to the installation column 2 using the connecting tower barrel 800 in the nacelle. Optionally, the nacelle 700, the hub, and the connecting tower barrel 800 can be pre-installed on land in advance and then transported to the sea as a whole and lifted onto the installation column 2, or they can be disassembled into individual parts and lifted separately at sea.

[0158] Lifting the nacelle onto the installation column 2 is to complete the installation of multiple blades 600. After the nacelle is connected to the installation column 2, use the lifting tool 400 to lift the blades 600 and connect them to the hub, and finally obtain the impeller. Optionally, for the separate lifting of multiple blades 600, a single-blade 600 fixture can be used.

[0159] Optionally, since the entire above-mentioned lifting process is carried out on the installation platform 1, and the installation platform 1 is fixed at sea and has high stability, different from the shaking environment when the support tower barrel 500 is lifted on the floating foundation 200, therefore, the above-mentioned lifting on the installation platform 1 can not use the compensation device 300.

[0160] After obtaining the impeller, the impeller, the nacelle 700, and the connecting tower barrel 800 together form a power generation assembly. The installation platform 1 is used to complete the assembly of the above components at sea. Subsequently, the power generation assembly as a whole is lifted from the installation column 2 onto the support tower barrel 500 of the floating foundation 200 that has been completed for connection to obtain the final wind power generation unit.

[0161] The embodiment of the present invention provides an installation method for an offshore wind power generation unit. By setting up the installation platform 1 at sea, the installation of the power generation assembly at sea is realized, the assembly ability at sea is improved, and at the same time, it is convenient to disassemble the power generation assembly for transportation at sea, improving the convenience of sea transportation and reducing the pressure of onshore installation and the difficulty of sea transportation.

[0162] As an optional embodiment, please refer to Figure 5 and Figure 6 , the hub is provided with a plurality of connection ports. The step of lifting multiple blades 600 onto the hub to obtain the impeller includes:

[0163] Rotate the hub so that the opening of any one of the connection ports faces the horizontal direction;

[0164] Lift any one of the blades 600 horizontally to the connection port;

[0165] Repeat the above process to lift multiple blades 600 to their respective connection ports.

[0166] After the machine head is hoisted to the mounting column 2, the wheel hub can be optionally rotated using a turning tool inside the machine head so that one of the connection ports on the wheel hub faces horizontally. A pitch bearing is usually provided at the connection port to realize the pitch process of the blade 600.

[0167] Then, use the lifting device 400 to lift a blade 600 horizontally to the connection port of the hub and connect it to the hub, continue to rotate the hub so that the other connection port faces the horizontal direction, repeat this process to lift each of the three blades 600 to the corresponding connection port, and finally obtain the impeller.

[0168] An embodiment of the present invention provides an installation method for an offshore wind turbine generator set, which realizes the assembly of the blade 600 by rotating the hub and maintaining a horizontal direction with the hoisted blade 600, which is conducive to completing the installation connection of the blade 600 and improving the stability of the connection of the blade 600.

[0169] As an optional embodiment, the nose also includes a yaw system, and the nose is connected to the mounting column 2 through the yaw system. After the step of hoisting multiple blades 600 to the hub to obtain the impeller, it also includes: using the yaw system to rotate the cabin 700 and the impeller so that the impeller has hoisting space.

[0170] Optionally, the yaw system in this embodiment may be a system provided by the nose of the aircraft, and its main function is to be able to perform rotational adjustment on the nacelle 700 and the impeller hoisted onto the mounting column 2 .

[0171] During the process of installing the blade 600 to the hub, the yaw system may be used to firstly rotate and adjust the direction of the hub so that the hub faces the hanger 400 , thereby facilitating docking with the blade 600 .

[0172] After obtaining the nacelle 700 and the impeller, they need to be hoisted as a whole onto the supporting tower 500 on the floating foundation 200. At this time, the yaw system can be used to rotate the nacelle 700 and the impeller on the mounting column 2 toward the sea, thereby avoiding the structure of the sling 400 and the mounting platform 1, and preventing collision with other structures caused by the blades 600 being too long during hoisting. The yaw system can turn the impeller toward a position that is more favorable for hoisting, providing more sufficient hoisting space.

[0173] When hoisting the entire power generation assembly, the compensation device 300 is needed to buffer the shaking when hoisting on the supporting tower 500, and the connecting tower 800 in the power generation assembly is connected with the docking device 100 at the top of the supporting tower 500 to complete the docking.

[0174] For the replacement of large components of the floating unit, the reverse process of installation can be adopted, that is, the nacelle and three blades 600 and the connecting tower barrel 800 are hoisted onto the installation column 2 to carry out the replacement work of the blades 600, and then the replaced power generation components are hoisted as a whole onto the support tower barrel 500 of the floating foundation 200, without the need to tow the floating foundation 200 and the whole machine back to the dock for component replacement work as in the prior art.

[0175] An embodiment of the present invention provides an installation method for an offshore wind turbine generator. By setting the yaw system on the installation column 2, the rotational adjustment of the power generation components is realized, which has better adjustment flexibility, is convenient for adjusting to a better installation position, and is beneficial to the completion of offshore installation.

[0176] An embodiment of the present invention provides an installation method for an offshore wind turbine generator. By installing a docking device on the floating foundation, using a compensation device to insert the support tower barrel into the docking cavity of the docking device, and then connecting the support tower barrel to the floating foundation, the docking device can provide a preliminary docking position for the support tower barrel and fix it. At the same time, the compensation device can form a buffer during the hoisting process, overcome the shaking during offshore operation, make the installation process of the support tower barrel more stable, meet the offshore operation environment and installation conditions, and then use the compensation device to hoist the power generation components and also form docking and fixation through the docking device to complete the installation operation of the offshore unit. The cooperation of the docking device and the compensation device improves the stability of the offshore hoisting process, enables the ability to perform hoisting operations offshore, and reduces the risks during the hoisting process. At the same time, carrying out installation operations offshore also avoids operations at the dock, avoids replacing large cranes and measures for strengthening the dock, and saves installation costs.

[0177] Although the present invention has been described with reference to the preferred embodiments, various improvements can be made to it and its components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. An installation method for an offshore wind turbine generator, characterized in that, Including: Providing a docking device (100), movably fixing the docking device (100) on a floating foundation (200), the docking device (100) including an annular body (10) and a docking cavity penetrating through itself; Connecting a compensation device (300) to a sling (400), the sling (400) connecting a hoisted object through the compensation device (300), the compensation device (300) including a fixing mechanism (20) and an adjusting mechanism (30), the adjusting mechanism (30) being arranged on the fixing mechanism (20) and configured to be able to move relative to the fixing mechanism (20) to absorb the sway of the hoisted object; Hoisting and supporting a tower barrel (500) by using the compensation device (300), inserting the tower barrel (500) into the docking cavity and connecting it to the floating foundation (200); Moving the docking device (100) axially along the tower barrel (500) to an end of the tower barrel (500) away from the floating foundation (200) and movably fixing it on the outer wall of the tower barrel (500); Hoisting a power generation assembly by using the compensation device (300), the power generation assembly including an impeller, a nacelle (700) and an adapter tower barrel (800) connected to the nacelle (700), inserting the adapter tower barrel (800) into the docking cavity and connecting it to the tower barrel (500).

2. The installation method according to claim 1, wherein The tower barrel (500) includes a plurality of tower barrel segments. The step of hoisting and supporting the tower barrel (500) by using the compensation device (300), inserting the tower barrel (500) into the docking cavity and connecting it to the floating foundation (200) includes: Hoisting a first tower barrel segment (501) by using the compensation device (300), inserting the first tower barrel segment (501) into the docking cavity and connecting it to the floating foundation (200); Moving the docking device (100) axially to an end of the first tower barrel segment (501) away from the floating foundation (200) and fixing it; Hoisting a second tower barrel segment (502) by using the compensation device (300), inserting the second tower barrel segment (502) into the docking cavity and connecting it to the first tower barrel segment (501); Repeating the above steps to hoist the remaining tower barrel segments until all the tower barrel segments are connected to each other to obtain the tower barrel (500).

3. The installation method according to claim 2, characterized in that The docking device (100) includes a limiting body (40), the limiting body (40) being arranged at one end of the annular body (10) and protruding towards the docking cavity, a limiting protrusion (41) being arranged on the limiting body (40), the tower barrel segment including a connecting plate protruding from the outer wall, and a connecting hole being arranged on the connecting plate; The step of hoisting the second tower section (502) by using the compensation device (300), inserting the second tower section (502) into the docking cavity and connecting it to the first tower section (501) includes: docking the connecting plate of the second tower section (502) to the limiting body (40) and inserting the limiting protrusion (41) into the connecting hole, so that the limiting body (40) supports the second tower section (502).

4. The installation method according to claim 3, characterized in that, The docking device (100) includes a telescopic assembly (50), one end of the telescopic assembly (50) is connected to the limiting body (40) and the other end is connected to the annular body (10); After the step of docking the connecting plate of the second tower section (502) to the limiting body (40) and inserting the limiting protrusion (41) into the connecting hole, so that the limiting body (40) supports the second tower section (502), it further includes: controlling the telescopic assembly (50) to contract towards the docking cavity, so as to drive the limiting body (40) and the second tower section (502) to move towards the first tower section (501) until the two are docked.

5. The installation method according to claim 3, characterized in that The docking device (100) includes a rotating member (60), the rotating member (60) is arranged at one end of the annular body (10) and is connected to the limiting body (40); Before the step of docking the connecting plate of the second tower section (502) to the limiting body (40) and inserting the limiting protrusion (41) into the connecting hole, so that the limiting body (40) supports the second tower section (502), it further includes: controlling the rotating member (60) to rotate along the circumferential direction of the first tower section (501) to drive the limiting body (40) to rotate until the docking reference line of the limiting body (40) matches the docking reference line of the first tower section (501).

6. The installation method according to claim 2, characterized in that, The compensation device (300) includes a rotating member (70), the rotating member (70) is connected to the adjusting mechanism (30) and is configured to drive the adjusting mechanism (30) to rotate; The step of hoisting the second tower section (502) by using the compensation device (300), inserting the second tower section (502) into the docking cavity and connecting it to the first tower section (501) includes: driving the adjusting mechanism (30) to rotate by using the rotating member (70) to drive the second tower section (502) to rotate until the docking reference line of the second tower section (502) matches the docking reference line of the first tower section (501).

7. The installation method according to claim 1, wherein The docking device (100) includes a locking member (80), the locking member (80) is arranged on the annular body (10); The step of moving the docking device (100) axially along the support tower (500) to the end of the support tower (500) away from the floating foundation (200) and fixing it includes: fixing the docking device (100) on the support tower (500) by using the locking member (80).

8. The installation method according to claim 7, wherein, The locking member (80) includes a fixing pin. The outer wall of the supporting tower barrel (500) is provided with a moving guide rail, and positioning holes are arranged on the moving guide rail. The step of moving the docking device (100) axially along the supporting tower barrel (500) to the end of the supporting tower barrel (500) away from the floating foundation (200) and fixing it includes: after moving the docking device (100) along the moving guide rail to the end of the supporting tower barrel (500) away from the floating foundation (200), inserting the fixing pin into the positioning hole to fix the docking device (100) on the supporting tower barrel (500).

9. The installation method according to claim 1, characterized in that, The annular body (10) includes a first ring body (11) and a second ring body (12) that are movably connected. The first ring body (11) and the second ring body (12) enclose the adjustable docking cavity. The step of moving the docking device (100) axially along the supporting tower barrel (500) to the end of the supporting tower barrel (500) away from the floating foundation (200) and fixing it includes: Fixing the second ring body (12) and moving the first ring body (11) axially toward the side gradually away from the second ring body (12), wherein the space of the docking cavity is adjusted. When the first ring body (11) moves to the end of the supporting tower barrel (500) away from the floating foundation (200), fixing the first ring body (11) and moving the second ring body (12) axially toward the side gradually approaching the first ring body (11). When the second ring body (12) moves to the end of the supporting tower barrel (500) away from the floating foundation (200), fixing the second ring body (12) and enclosing with the first ring body (11) to form an adjusted docking cavity.

10. The installation method according to claim 1, characterized in that, The compensation device (300) includes a sling (90). The sling (90) is connected to the adjusting mechanism (30) and its position on the adjusting mechanism (30) is adjustable. The step of hoisting the supporting tower barrel (500) by using the compensation device (300), inserting the supporting tower barrel (500) into the docking cavity and connecting it to the floating foundation (200) includes: Adjusting the position of the sling (90) relative to the adjusting mechanism (30) so that the sling (90) has the same extending direction as the supporting tower barrel (500). Connecting the sling (90) to the supporting tower barrel (500) and hoisting the supporting tower barrel (500).

11. The installation method according to claim 1, wherein Before the step of hoisting the power generation assembly by using the compensation device (300), inserting the connecting tower barrel (800) into the docking cavity and connecting it to the supporting tower barrel (500), it further includes: Providing an installation platform (1), and installation columns (2) are arranged on the installation platform (1). Lift the nacelle to the installation column (2). The nacelle includes the nacelle housing (700), the hub connected to the nacelle housing (700), and the connecting tower barrel (800). The nacelle is connected to the installation column (2) through the connecting tower barrel (800). Lift multiple blades (600) to the hub to obtain the impeller.

12. The installation method according to claim 11, characterized in that A plurality of connection ports are provided on the hub. The step of lifting multiple blades (600) to the hub to obtain the impeller includes: Rotate the hub so that the opening of any one of the connection ports faces the horizontal direction; Lift any one of the blades (600) to the connection port along the horizontal direction; Repeat the above process to lift each of the multiple blades (600) to the multiple connection ports respectively.

13. The installation method according to claim 11, characterized in that, The nacelle further includes a yaw system. The nacelle is connected to the installation column (2) through the yaw system. After the step of lifting multiple blades (600) to the hub to obtain the impeller, it further includes: using the yaw system to rotate the nacelle housing (700) and the impeller. The impeller has a lifting space.

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