Transformer maintenance method and replacement system

Abstract

The invention relates to a transformer maintenance method and a transformer replacement system. The maintenance method comprises the steps that a disassembly tool is provided, a lifting assembly is connected with a cabin, and a conveying assembly is arranged on the side, away from the cabin, of a tower and adsorbed to the tower with first adsorption strength; a second driving part is controlled to drive the adsorption part to move relative to the base body, so that the whole conveying assembly moves to a preset position towards the side where the cabin is located in the height direction of the tower; controlling the butt joint of the butt joint piece and the transformer; the transformer is separated from the cabin, the first driving part is controlled to release the connecting cable, and the conveying assembly is controlled to abut against the tower, so that the transformer is lowered to the floating foundation; the transformer is maintained or replaced with a new transformer and connected with the conveying assembly; and the first driving part is controlled to recover the connecting cable, and the conveying assembly is controlled to abut against the tower, so that the maintained or replaced transformer is lifted to the cabin and connected with the cabin. According to the invention, the replacement of the transformer which is hung below the floating fan is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power, and in particular to a transformer maintenance method and a replacement system. Background Art

[0002] At present, the operation and maintenance of floating units is a global problem. Due to the cost reduction of the units, from the construction to the operation and maintenance period, it is considered to replace unit components such as transformers without large self-elevating installation vessels.

[0003] From the perspective of cost saving, the transformer of the offshore floating wind turbine structure usually adopts a downward-hanging design, which can greatly reduce the design cost of the unit cabin, reduce the space occupied inside the cabin, and shorten the length of the entire cabin. Especially in view of the current trend of decreasing unit price of the unit, the medium-speed permanent magnet units in the entire industry are basically designed with the transformer hanging downward.

[0004] The downward-hanging design of the transformer brings huge challenges to the subsequent transformer replacement, so replacing the downward-mounted transformer has become a difficult problem in the industry. Summary of the invention

[0005] The embodiments of the present invention provide a transformer maintenance method and a replacement system, which are conducive to the replacement of a transformer designed to be hung under a floating wind turbine.

[0006] On the one hand, according to an embodiment of the present invention, a transformer maintenance method is provided for a floating wind turbine, wherein the floating wind turbine includes a floating foundation, a tower, a nacelle, and a transformer disposed outside the nacelle, and the maintenance method includes:

[0007] A disassembly tool is provided, the disassembly tool comprises a lifting assembly and a conveying assembly, the lifting assembly comprises a first driving member and a connecting rope, the first driving member is connected to the connecting rope and can retract and release the connecting rope, the conveying assembly comprises a base body and a docking member arranged on the base body, two or more adsorption components and a second driving member, the adsorption component is configured to be adsorbed and connected to the tower frame and the adsorption force is adjustable, and the second driving member is connected to the adsorption component and configured to drive the adsorption component to move;

[0008] Connecting the lifting assembly to the cabin, placing the transport assembly on a side of the tower away from the cabin and adsorbing it to the tower with a first adsorption strength;

[0009] Controlling the second driving member to drive the adsorption component to move relative to the base, so that the transport assembly as a whole moves along the height direction of the tower toward the side where the cabin is located to a predetermined position;

[0010] Control the docking piece to dock with the transformer;

[0011] Separate the transformer from the nacelle, control the first drive member to release the connecting rope, and control the transport assembly to abut against the tower, so that the transformer is lowered to the floating foundation;

[0012] Maintain the transformer or replace it with a new one and connect it to the transportation component;

[0013] Control the first driving member to retract the connecting cable, and control the transportation component to abut against the tower, so that the maintained or replaced transformer is lifted to the nacelle and connected to the nacelle.

[0014] According to one aspect of the embodiments of the present invention, the step of controlling the second driving member to drive the adsorption member to move relative to the base body, so that the entire transportation component moves along the height direction of the tower to the side where the nacelle is located to a predetermined position includes:

[0015] Obtain the first motion acceleration value of the floating foundation;

[0016] When the first motion acceleration value is less than or equal to the first threshold, control the second driving member to drive the adsorption member to move relative to the base body, so that the entire transportation component moves along the height direction of the tower to the side where the nacelle is located to a predetermined position.

[0017] According to one aspect of the embodiments of the present invention, when the first motion acceleration value is greater than the first threshold, control the adsorption member to adsorb on the tower with a second adsorption strength and the relative position with the tower is in a static state, and the second adsorption strength is greater than the first adsorption strength.

[0018] According to one aspect of the embodiments of the present invention, the value range of the first threshold is 0.5 - 0.7 times the gravitational acceleration.

[0019] According to one aspect of the embodiments of the present invention, the step of docking the docking member with the transformer includes:

[0020] Obtain the second motion acceleration value of the floating foundation;

[0021] When the second motion acceleration value is less than or equal to the second threshold, control the adsorption member to adsorb on the tower with a second adsorption strength and the relative position with the tower is in a static state, the second adsorption strength is greater than the first adsorption strength, and control the docking member to extend and be detachably connected to the transformer through fasteners.

[0022] According to one aspect of the embodiments of the present invention, when the second motion acceleration value is greater than the second threshold, control the adsorption member to adsorb on the tower with a second adsorption strength and the relative position with the tower is in a static state, the second adsorption strength is greater than the first adsorption strength, and keep the docking member at its initial length.

[0023] According to one aspect of the embodiments of the present invention, the value range of the second threshold is 0.2 - 0.3 times the gravitational acceleration.

[0024] According to one aspect of the embodiments of the present invention, after the step of docking the docking member with the transformer, the maintenance method further includes:

[0025] Obtain the third motion acceleration value of the floating foundation;

[0026] When the third motion acceleration value is greater than the third threshold, control the first driving member to release or retrieve the connecting cable, control the adsorption member to adsorb to the tower with the second adsorption strength and the relative position with the tower to be in a static state, the second adsorption strength is greater than the first adsorption strength, and control the docking member to extend and push against the transformer so that the center line of the transformer is inclined relative to the axis of the tower.

[0027] According to one aspect of the embodiments of the present invention, the value range of the third threshold is 0.5 - 0.7 times the acceleration of gravity.

[0028] On the other hand, according to an embodiment of the present invention, a maintenance system for a transformer is proposed, which is used for a floating wind turbine. The floating wind turbine includes a floating foundation, a tower, a nacelle, and a transformer arranged outside the nacelle. The maintenance system includes:

[0029] A disassembly tooling, including a lifting assembly and a transporting assembly. The lifting assembly includes a first driving member and a connecting cable. The first driving member is connected to the connecting cable and can retrieve and release the connecting cable. The transporting assembly includes a base body and a docking member, more than two adsorption members, and a second driving member arranged on the base body. Each adsorption member is configured to be adsorbed and connected to the tower and the adsorption force is adjustable. The second driving member is connected to the adsorption member and is configured to drive the adsorption member to move. The lifting assembly is arranged in the nacelle, and the connection is configured to be connected to the transformer; A controller, connected to the adsorption member and the second driving member, is configured to control the second driving member to drive the adsorption member to move relative to the base body, so that the entire transporting assembly moves along the height direction of the tower towards the side where the nacelle is located or towards the side away from the side where the nacelle is located, and control the value of the adsorption force of the adsorption member adsorbed to the tower.

[0030] According to another aspect of the embodiments of the present invention, the maintenance system further includes a collector arranged on the floating foundation. The collector is configured to obtain the motion acceleration value of the floating foundation; The controller is configured to:

[0031] When the motion acceleration value is less than or equal to the first threshold, control the adsorption member to adsorb to the tower with the first adsorption strength, and control the second driving member to drive the adsorption member to move relative to the base body, so that the entire transporting assembly moves along the height direction of the tower towards the side where the nacelle is located to a predetermined position;

[0032] When the motion acceleration value is greater than the first threshold, control the adsorption member to adsorb to the tower with the second adsorption strength and the relative position with the tower to be in a static state, the second adsorption strength is greater than the first adsorption strength.

[0033] According to another aspect of the embodiments of the present invention, the controller is connected to the docking member and is configured to:

[0034] When the docking piece is docked with the transformer and the motion acceleration value is greater than the first threshold, the docking piece is controlled to extend and push the transformer.

[0035] According to another aspect of the embodiment of the present invention, the controller is connected to the docking member, and the controller is configured as follows:

[0036] When the motion acceleration value is less than or equal to a second threshold value, the docking piece is controlled to extend and be detachably connected to the transformer via a fastener;

[0037] When the motion acceleration value is greater than a second threshold, the docking piece is kept at an initial length, and the second threshold is less than the first threshold.

[0038] According to the transformer maintenance method and replacement system provided by the embodiment of the present invention, the transformer replacement method includes providing a disassembly tool, the disassembly tool includes a lifting component and a transport component, the lifting component is connected to the cabin, the transport component is set at the bottom of the tower, the transport component can be located on the side of the tower away from the cabin and adsorbed on the tower, because the transport component includes a base and an adsorption component, a second drive member and a docking member arranged on the base, by controlling the second drive member to drive the adsorption component to move relative to the base, so that the transport component as a whole can move along the height direction of the tower, and no equipment such as a sling is required for transportation, thereby reducing the difficulty of replacement. After the transport component moves to a predetermined position on the tower, the docking member is docked with the transformer, and then the transformer is separated from the cabin, and the first drive member is controlled to release the connecting rope, and the transformer is lowered to the floating foundation under the action of gravity. During the lowering process, since the transport component is always in contact with the tower, the transformer will not collide with the tower during the lowering process, thereby ensuring safety. After the transformer is lowered to the floating foundation and maintained or updated, the connecting rope is recovered by controlling the first driving member, and the transport assembly is abutted against the tower, so that the transformer after maintenance or replacement can be raised to the nacelle, and can always avoid collision with the tower during the rising process. The replacement method is simple to operate, is conducive to the replacement of the transformer designed to be hung under the floating wind turbine, and ensures safety during replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Features, advantages, and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0040] Figure 1 It is a schematic diagram of the coordination between the maintenance system and the wind turbine generator set;

[0041] Figure 2 is a flowchart of a maintenance method according to an embodiment of the present invention;

[0042] Figure 3 Schematic diagram of the structure of a lifting assembly according to an embodiment of the present invention

[0043] Figure 4 is a schematic structural diagram of a transportation component according to an embodiment of the present invention;

[0044] Figure 5 is a flowchart of a maintenance method according to an embodiment of the present invention;

[0045] Figure 6 is a schematic structural diagram of a transportation component according to another embodiment of the present invention;

[0046] Figure 7 is a schematic structural diagram of a transportation component according to still another embodiment of the present invention;

[0047] Figure 8 is a schematic structural diagram of a transportation component according to yet another embodiment of the present invention.

[0048] 100 - tower; 200 - nacelle; 300 - transformer; 400 - impeller; 500 - generator; 600 - floating foundation;

[0049] 10 - lifting component; 11 - first driving member; 12 - connecting cable; 13 - sling;

[0050] 20 - transportation component; 21 - base; 211 - guiding portion; 22 - docking member; 221 - telescopic cylinder; 222 - connecting body; 23 - adsorption member; 231 - magnetic attachment; 232 - suction cup; 233 - ventilation pipe; 234 - air pump; 24 - second driving member.

[0051] In the drawings, the same components are denoted by the same reference numerals. The drawings are not drawn to actual scale. Detailed Description of the Embodiments

[0052] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous 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 description of the embodiments is merely provided to better understand the present invention by way of illustrating 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.

[0053] The orientation terms used in the following description are all the directions shown in the figures, and do not limit the specific structure of the maintenance method and replacement system of the transformer of the present invention. In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can 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 circumstances.

[0054] As Figure 1 shown, the floating wind turbine includes a floating foundation 600, a tower 100, a nacelle 200, a generator 500, an impeller 400, and a transformer 300. The nacelle 200 is arranged above the tower 100, and the generator 500 is arranged in the nacelle 200, which can be located inside the nacelle 200. Of course, it can also be located outside the nacelle 200. The impeller 400 includes a hub and blades. The blades are connected to the hub, and the hub is connected to the rotor of the generator. When the wind acts on the blades, the blades drive the hub to rotate, and then drive the rotor of the generator 500 to rotate relative to the stator, realizing the conversion of wind energy into electrical energy. The transformer 300 can be arranged outside the nacelle 200 and can adopt a hanging-down design. The transformer 300 can be electrically connected to the generator 500 and can be used to step up the converted electrical energy for grid connection to ensure the power consumption demand.

[0055] The transformer 300 of the floating wind turbine usually adopts a hanging-down design, which can greatly reduce the design cost of the nacelle 200, reduce the occupied space inside the nacelle 200, and the length of the entire nacelle 200 can also be reduced. Especially in view of the current trend of continuous reduction in the unit price of the unit, the medium-speed permanent magnet units in the whole industry are basically designed according to the hanging-down design of the transformer 300. The hanging-down design of the transformer 300 brings great challenges to the subsequent replacement of the transformer 300.

[0056] Based on this, an embodiment of the present application provides a maintenance method and replacement system for a transformer, which can be used for the floating wind turbines provided in the above embodiments, and is beneficial to meeting the replacement of the transformer with a hanging-down design of the floating wind turbine.

[0057] As Figures 2 to 4 shown, the maintenance method includes:

[0058] S100. Provide a disassembly tool, which includes a lifting assembly 10 and a conveying assembly 20. The lifting assembly 10 includes a first driving member 11 and a connecting rope 12. The first driving member 11 is connected to the connecting rope 12 and can retract and release the connecting rope 12. The conveying assembly 20 includes a base 21 and a docking member 22 arranged on the base 21, two or more adsorption components 23 and a second driving member 24. The adsorption component 23 is configured to be adsorbed and connected to the tower 100 and the adsorption force is adjustable. The second driving member 24 is connected to the adsorption component 23 and is configured to drive the adsorption component 23 to move.

[0059] S200 , connecting the lifting assembly 10 to the nacelle 200 , disposing the transport assembly 20 on a side of the tower 100 away from the nacelle 200 and adsorbing it to the tower 100 with a first adsorption strength.

[0060] S300 , controlling the second driving member 24 to drive the adsorption component 23 to move relative to the base 21 , so that the transport assembly 20 as a whole moves along the height direction of the tower 100 toward the side where the cabin is located to a predetermined position.

[0061] S400 , controlling the docking piece 22 to dock with the transformer 300 .

[0062] S500 , separating the transformer 300 from the nacelle 200 , controlling the first driving member 11 to release the connecting rope 12 , and controlling the transport assembly 20 to abut against the tower 100 , so that the transformer 300 is lowered to the floating foundation 600 .

[0063] S600 , maintaining the transformer 300 or replacing it with a new transformer 300 and connecting it to the transport component 20 .

[0064] S700 , control the first driving member 11 to retract the connecting rope 12 , and control the transport assembly 20 to abut against the tower 100 , so that the transformer 300 after maintenance or replacement is lifted to the nacelle 200 and connected to the nacelle 200 .

[0065] In step S100, the first driving member 11 of the lifting assembly 10 provided includes but is not limited to a motor, a motor and other devices, and can retract and release the connecting rope 12 by winding or other methods. For example, the first driving member 11 can drive a structure such as a reel to rotate to achieve the release or winding recovery of the connecting rope 12. The adsorption component 23 includes but is not limited to at least one of magnetic adsorption and suction cup adsorption to ensure the connection requirements with the tower 100.

[0066] In step S200, the first driving member 11 of the lifting assembly 10 can be set inside the cabin 200 and connected to the cabin 200, and can optionally be connected in a detachable manner. The first adsorption strength ensures that the gravity of the transport assembly 20 can be overcome, so that the transport assembly 20 as a whole can be adsorbed and connected to the tower 100 and move relative to the tower 100.

[0067] In step S300, the adsorption components 23 on the tower 100 include but are not limited to moving in a sliding manner or a rolling manner. Multiple adsorption components 23 can be synchronously driven by a second driving member 24. Of course, each adsorption component 23 can also be correspondingly provided with a second driving member 24. The second driving member 24 can drive the adsorption component 23 to slide or roll relative to the base body 21, and then each second driving member 24 drives the corresponding adsorption component 23 to move upward or downward along the tower 100. The predetermined position can be on the side of the tower 100 close to the nacelle 200, so that the docking member 22 can be docked with the transformer 300.

[0068] In step S400, the docking member 22 and the transformer 300 can be detachably connected by fasteners such as bolts. The docking member 22 can be connected to the outer wall surface of the transformer 300. Of course, the docking member 22 can also extend into the transformer 300 and be connected to the transformer 300.

[0069] In step S500, the operator can separate the transformer 300 from the nacelle 200, control the first driving member 11 to release the connecting cable 12, so that the released length of the connecting cable 12 gradually becomes longer. Since the transformer 300 is separated from the nacelle 200, under the action of gravity, the transformer 300 will slowly descend. The conveying assembly 20 always abuts against the tower 100, and there may be no adsorption force between the conveying assembly 20 and the tower 100.

[0070] In step S600, the maintained transformer 300 or the newly replaced transformer 300 can be reconnected to the connecting cable 12.

[0071] In step S700, the first driving member 11 retrieves the connecting cable 12, so that the released length of the connecting cable 12 gradually becomes shorter, pulling the transformer 300 to slowly rise. In the above process, the conveying assembly 20 can abut against the tower 100, and there may be no adsorption force between the conveying assembly 20 and the tower 100. After being transported to the nacelle 200 and connected to the nacelle 200, the disassembly tooling can be removed for the next use.

[0072] The maintenance method of the transformer 300 provided by an embodiment of the present application includes providing a disassembly tooling. The disassembly tooling includes a lifting component 10 and a transporting component 20. Connect the lifting component 10 to the nacelle 200, and set the transporting component 20 at the bottom of the tower 100. The transporting component 20 can be located on the side of the tower 100 facing away from the nacelle 200 and adsorbed on the tower 100. Since the transporting component 20 includes a base body 21 and an adsorption component 23, a second driving member 24, and a docking member 22 provided on the base body 21, by controlling the second driving member 24 to drive the adsorption component 23 to move relative to the base body 21, the whole transporting component 20 can move along the height direction of the tower 100, and there is no need for equipment such as a lifting tool 13 for transportation, reducing the replacement difficulty. After the transporting component 20 moves to a predetermined position on the tower 100, dock the docking member 22 with the transformer 300, then separate the transformer 300 from the nacelle 200, and control the first driving member 11 to release the connecting cable 12. Under the action of gravity, the transformer 300 will be lowered to the floating foundation 600. During the lowering process, since the transporting component 20 always abuts against the tower 100, the transformer 300 will not collide with the tower 100 during the lowering process, ensuring safety. After the transformer 300 is lowered to the floating foundation 600 and maintained or updated, control the first driving member 11 to recover the connecting cable 12, and make the transporting component 20 abut against the tower 100, so that the maintained or replaced transformer 300 can rise to the nacelle 200, and can always avoid colliding with the tower 100 during the rising process. This replacement method is simple to operate, and is beneficial to the replacement of the transformer 300 designed under the hanging type of the floating wind turbine, and ensures safety during replacement.

[0073] In some optional embodiments, the maintenance method of the transformer 300 provided by an embodiment of the present application, step S300 includes:

[0074] Obtain the first motion acceleration value of the floating foundation 600.

[0075] When the first motion acceleration value is less than or equal to the first threshold, control the second driving member 24 to drive the adsorption component 23 to move relative to the base body 21, so that the whole transporting component 20 moves along the height direction of the tower 100 towards the side where the nacelle 200 is located to a predetermined position.

[0076] The motion acceleration value of the floating foundation 600 mentioned above or below can be understood as the motion acceleration value when the floating foundation 600 shakes under the action of seawater. The first motion acceleration value and the subsequent mentioned second motion acceleration value and third motion acceleration value are distinguished in name to better distinguish the motion acceleration values of the floating foundation 600 collected at different time periods.

[0077] The first motion acceleration value of the floating foundation 600 can be obtained before the transportation component 20 moves along the tower 100 or during the movement along the tower 100. Before the transportation component 20 moves along the tower 100, when the obtained first motion acceleration value is less than or equal to the first threshold, the second driving member 24 is controlled to drive the adsorption member 23 to move along the tower 100. After the transportation component 20 moves along the tower 100, the first motion acceleration value of the floating foundation 600 can also be obtained in real time or at a predetermined time interval. When the first motion acceleration value is less than or equal to the first threshold, the second driving member 24 is controlled to continue driving the adsorption member 23 to move along the tower 100, so that the entire transportation component 20 moves on the tower 100.

[0078] In the maintenance method provided by an embodiment of the present application, step S300 adopts the above operation mode, so that the transportation component 20 can move along the tower 100 within a safe working condition, ensuring the safety performance of the transportation component 20 during the independent movement on the tower 100 and reducing the safety risk caused by the transportation component 20 detaching and falling on the tower 100.

[0079] In some optional embodiments, in the maintenance method provided by an embodiment of the present application, step S300 further includes that when the first motion acceleration value is greater than the first threshold, the adsorption member 23 is controlled to adsorb on the tower 100 with a second adsorption strength and the relative position with the tower 100 is in a static state, and the second adsorption strength is greater than the first adsorption strength.

[0080] Optionally, in this step, the first motion acceleration value of the floating foundation 600 can be obtained before the transportation component 20 moves along the tower 100 or during the movement along the tower 100. Before the transportation component 20 moves along the tower 100, when the obtained first motion acceleration value is greater than the first threshold, the adsorption member 23 is controlled to adsorb on the tower 100 with a second adsorption strength and the relative position with the tower 100 is in a static state. After the transportation component 20 moves along the tower 100, the first motion acceleration value of the floating foundation 600 can also be obtained in real time or at a predetermined time interval. When the obtained first motion acceleration value is greater than the first threshold, the adsorption member 23 is controlled to adsorb on the tower 100 with a second adsorption strength and the relative position with the tower 100 is in a static state, that is, the movement is stopped until the first motion acceleration value is less than or equal to the first threshold, and then the transportation component 20 is controlled to continue moving.

[0081] Through the above settings, when the floating foundation 600 drives the tower 100 to shake violently, the high-strength adsorption ability is used to ensure the connection strength between the transportation component 20 and the tower 100, further improving the safety of the maintenance method.

[0082] In some alternative embodiments, for the maintenance method provided by an embodiment of the present application, the value range of the first threshold is 0.5 - 0.7 times the gravitational acceleration, including the two end values of 0.5 and 0.7. It can be optionally 0.55, 0.6 or 0.65 times the gravitational acceleration.

[0083] Adopting the above range for the first threshold is beneficial to controlling the adsorption strength between the transportation component 20 and the tower 100 as needed, and ensuring the safety of the transportation component 20 during movement relative to the tower 100.

[0084] In some alternative embodiments, for the maintenance method provided by an embodiment of the present application, step S400 includes:

[0085] Obtain the second motion acceleration value of the floating foundation 600.

[0086] When the second motion acceleration value is less than or equal to the second threshold, control the adsorption component 23 to adsorb to the tower 100 with the second adsorption strength and the relative position with the tower 100 is in a static state. The second adsorption strength is greater than the first adsorption strength, and control the docking member 22 to extend and be detachably connected to the transformer 300 through fasteners.

[0087] The second motion acceleration value of the floating foundation 600 can be obtained after step S300 ends and the transportation component 20 has reached the predetermined position.

[0088] The docking member 22 can include a telescopic cylinder and a multi-stage casing with a rope pulley, and can be telescopic, so that it can extend towards the position where the transformer 300 is located. When it extends to the required length, it can be connected to the transformer 300 by an operator.

[0089] For the maintenance method provided by an embodiment of the present application, by obtaining the second motion acceleration value of the floating foundation 600, and when the second motion acceleration value is less than or equal to the second threshold, controlling the adsorption component 23 to adsorb to the tower 100 with the second adsorption strength and the relative position with the tower 100 is in a static state. The second adsorption strength is greater than the first adsorption strength, and controlling the docking member 22 to extend and be detachably connected to the transformer 300 through fasteners, it can ensure the stability of the connection between the transportation component 20 and the tower 100 when the transportation component 20 is docked with the transformer 300. At the same time, it can ensure that the operator can enter the transformer 300 when the floating foundation 600 drives the tower 100 to shake within a full range, realizing the docking between the transformer 300 and the transportation component 20.

[0090] In some alternative embodiments, for the maintenance method provided by an embodiment of the present application, when the second motion acceleration value is greater than the second threshold, the adsorption component 23 is controlled to adsorb to the tower 100 with the second adsorption strength and the relative position with the tower 100 is in a static state. The second adsorption strength is greater than the first adsorption strength, and the docking member 22 is maintained at the initial length.

[0091] That is to say, when the motion acceleration value is greater than the second threshold, it is also necessary to increase the adsorption strength between the adsorption component 23 and the tower 100, and at the same time, do not dock temporarily to avoid potential safety hazards to the operators due to excessive shaking of the floating foundation 600 during the docking process.

[0092] In some alternative embodiments, for the maintenance method provided by an embodiment of the present application, the value range of the second threshold is 0.2 - 0.3 times the gravitational acceleration, including the two end values of 0.2 times and 0.3 times.

[0093] For the maintenance method provided by an embodiment of the present application, by making the second threshold adopt the above range, the safety performance during the docking of the transportation component 20 and the transformer 300 can be ensured, and the potential safety hazards of the operators can be reduced.

[0094] In some alternative embodiments, for the maintenance method provided by an embodiment of the present application, after step S400, it further includes:

[0095] Obtain the third motion acceleration value of the floating foundation 600.

[0096] When the third motion acceleration value is greater than the third threshold, the adsorption component 23 is controlled to adsorb to the tower 100 with the second adsorption strength and the relative position with the tower 100 is in a static state. The second adsorption strength is greater than the first adsorption strength, and the docking member 22 is controlled to elongate and push the transformer 300 so that the center line of the transformer 300 is inclined relative to the height direction of the tower 100.

[0097] It can be to obtain the third motion acceleration of the floating foundation 600 during the descent of the transformer 300 to be maintained or replaced, and during the ascent of the transformer 300 after maintenance or replacement.

[0098] In a maintenance method provided by an embodiment of the present application, through the above settings, when the transformer 300 to be repaired or replaced is descending and when the transformer 300 after maintenance or replacement is ascending, once the floating foundation 600 shakes violently, the ascent or descent of the transformer 300 can be controlled. Moreover, the adsorption strength between the adsorption component 23 and the tower 100 can be increased. At the same time, the docking component 22 can be controlled to extend and push the transformer 300, so that the transformer 300 is set at a certain angle relative to the vertical direction. By using the component of the gravity of the transformer 300, it is realized that the transformer 300 is integrated with the tower 100 without separation, ensuring the safety of the replacement of the transformer 300 under the condition of relatively violent shaking of the floating foundation 600.

[0099] Optionally, during the operation of the transformer 300, that is, in the ascending or descending state, its center line and the height direction of the tower 100, which can also be understood as the axial direction of the tower 100, can be parallel to each other or approximately parallel. When the third motion acceleration value is greater than the third threshold, the docking component 22 is controlled to extend and push the transformer 300, so that the inclination angle of the center line of the transformer 300 relative to the height direction of the tower 100 is greater than 10°.

[0100] Through the above settings, the component of the gravity of the transformer 300 can be effectively utilized to realize that the transformer 300 is integrated with the tower 100 without separation, ensuring the safety of the replacement of the transformer 300 under the condition of relatively violent shaking of the floating foundation 600.

[0101] In some optional embodiments, the value range of the third threshold is 0.5 - 0.7 times the gravitational acceleration, including the two end values of 0.5 and 0.7, and it can be optionally 0.55, 0.6 or 0.65 times the gravitational acceleration.

[0102] Adopting the above range for the third threshold is conducive to controlling the adsorption strength between the transportation component 20 and the tower 100 as needed, as well as the telescopic length of the docking component 22, ensuring the safety of the replacement process of the transformer 300.

[0103] As Figure 5 shown, a maintenance method provided by an embodiment of the present application is used for a floating wind turbine and can optionally be used for the replacement of the box-type transformer 300. For the sake of more concise expression, hereinafter, the "box-type transformer 300" will be simply referred to as "box transformer". The specific operation logic is as follows:

[0104] When it is necessary to replace the floating wind turbine, the electric control of the unit can be adjusted to the box transformer replacement working condition first, and the box transformer replacement program instruction can be transmitted to the controller of the wind turbine generator set. When the motion acceleration value of the floating foundation 600 obtained is greater than 0.6 times the gravitational acceleration, it does not enter the replacement, and waits for the window period of box transformer replacement. The motion acceleration value of the floating foundation 600 is less than or equal to 0.6 times the gravitational acceleration. When the motion acceleration value of the floating foundation 600 is less than or equal to 0.6 times the gravitational acceleration, the unit shuts down and is adjusted to the operation and maintenance working condition.

[0105] Transport the box transformer tooling to the position of the floating foundation 600, and adsorb the adsorption component 23 to the tower 100. The suction cup adsorption or magnetic adsorption method can be adopted. Taking magnetic adsorption as an example, the adsorption intensity can be divided into zero magnetism, medium magnetism and strong magnetism.

[0106] When the motion acceleration of the floating foundation 600 obtained is less than 0.6 times the gravitational acceleration, the transport component 20 can be controlled to move upward at the bottom of the tower 100. During the movement, when it is detected that the acceleration is less than or equal to 0.6 times the gravitational acceleration, continue to climb to the predetermined position. When it is greater than 0.6 times the gravitational acceleration, strong magnetic adsorption is adopted to ensure the static state until the motion acceleration value of the floating foundation 600 is less than 0.6 times the gravitational acceleration value and then continue to climb to the designated position.

[0107] When the transport component 20 climbs to the designated position, continue to monitor the motion acceleration value of the floating foundation 600. When it is greater than 0.3 times the gravitational acceleration and less than 0.6 times the gravitational acceleration, the connecting cable 12 can be connected to the transformer 300. Of course, the connecting cable 12 can also be connected to the transformer 300 before climbing. When the monitored motion acceleration value of the floating foundation 600 is less than or equal to 0.3 times the gravitational acceleration, the docking component 22 can be controlled to extend and dock with the transformer 300.

[0108] After the disassembly tooling is installed in place, the lifting component 10 can be started to lower the box transformer to be replaced. At the same time, start the climbing process control program of the box transformer tooling. When the box transformer is lowered to the bottom of the tower and the acceleration < 0.6G, the damaged box transformer can be replaced by a ship machine, and a new box transformer can be replaced, lifted, start the climbing process control program of the box transformer tooling, reverse the disassembly process, install in place, restart the unit, and complete the acceptance. (Ensure normal before installing the new box transformer).

[0109] Such as Figure 1 、 Figure 3 、 Figure 4As shown in the figure, on the other hand, an embodiment of the present application further provides a maintenance system for a transformer 300 for a floating wind turbine. The floating wind turbine includes a floating foundation 600, a tower 100 disposed on the floating foundation 600, a nacelle 200 disposed on the tower 100, and a transformer 300 disposed outside the nacelle 200. The maintenance system includes a disassembly and assembly tooling and a controller. The disassembly tooling includes a lifting assembly 10 and a transportation assembly 20. The lifting assembly 10 includes a first driving member 11 and a connecting cable 12. The first driving member 11 is connected to the connecting cable 12 and can take in and release the connecting cable 12. The transportation assembly 20 includes a base body 21, a docking member 22 disposed on the base body 21, more than two adsorption members 23, and a second driving member 24. Each adsorption member 23 is configured to be adsorbed and connected to the tower 100 with adjustable adsorption force. The second driving member 24 is connected to the adsorption member 23 and is configured to drive the adsorption member 23 to move. The lifting assembly 10 is disposed in the nacelle 200, and the connecting cable 12 is connected to the transformer 300. The controller is connected to the adsorption member 23 and the second driving member 24. The controller is configured to control the second driving member 24 to drive the adsorption member 23 to move relative to the base body 21, so that the entire transportation assembly 20 moves along the height direction of the tower 100 towards the side where the nacelle 200 is located or towards the side away from the side where the nacelle 200 is located, and control the numerical value of the adsorption force of the adsorption member 23 adsorbed on the tower 100.

[0110] The maintenance system for the transformer 300 provided by an embodiment of the present application can be used to perform the maintenance method of the transformer 300 provided in each of the above embodiments. The maintenance system includes a disassembly tooling and a controller. The setting of the disassembly tooling is conducive to meeting the disassembly and replacement of the transformer 300. The setting of the controller is conducive to controlling the second driving member 24 to drive the adsorption member 23 to move relative to the base body 21, so that the entire transportation assembly 20 moves along the height direction of the tower 100 towards the side where the nacelle 200 is located or towards the side away from the side where the nacelle 200 is located, and control the numerical value of the adsorption force of the adsorption member 23 adsorbed on the tower 100, and can meet the maintenance of the transformer 300 and the safety during the maintenance process.

[0111] In some optional embodiments, the maintenance system provided by an embodiment of the present application further includes a collector. The collector is disposed on the floating foundation 600 and is configured to obtain the motion acceleration value of the floating foundation 600. The controller is configured to:

[0112] When the motion acceleration value is less than or equal to the first threshold, control the adsorption member 23 to adsorb on the tower 100 with the first adsorption intensity, and control the second driving member 24 to drive the adsorption member 23 to move relative to the base body 21, so that the entire transportation assembly 20 moves along the height direction of the tower 100 towards the side where the nacelle 200 is located to a predetermined position.

[0113] When the motion acceleration value is greater than the first threshold, control the adsorption component 23 to adsorb to the tower 100 with the second adsorption strength and keep the relative position with the tower 100 stationary, where the second adsorption strength is greater than the first adsorption strength.

[0114] The motion acceleration value of the floating foundation 600 acquired by the collector can be before the transportation component 20 moves along the tower 100 or during the movement along the tower 100. Before the transportation component 20 moves along the tower 100, when the acquired motion acceleration value is less than or equal to the first threshold, control the second driving member 24 to drive the adsorption component 23 to move along the tower 100. After the transportation component 20 moves along the tower 100, the motion acceleration value of the floating foundation 600 can also be acquired in real time or at a predetermined time interval. When it is less than or equal to the first threshold, control the second driving member 24 to continue driving the adsorption component 23 to move along the tower 100, so that the entire transportation component 20 moves on the tower 100. When the motion acceleration is greater than the first threshold, control the adsorption component 23 to adsorb to the tower 100 with the second adsorption strength and keep the relative position with the tower 100 stationary, where the second adsorption strength is greater than the first adsorption strength.

[0115] Through the above settings, when the floating foundation 600 drives the tower 100 to shake violently, the high-strength adsorption ability is used to ensure the connection strength between the transportation component 20 and the tower 100, further improving the safety of the maintenance system.

[0116] In some optional embodiments, for the maintenance method provided by an embodiment of the present application, the value range of the first threshold is 0.5 - 0.7 times the gravitational acceleration, including the two end values of 0.5 and 0.7. It can be optionally 0.55, 0.6 or 0.65 times the gravitational acceleration.

[0117] Adopting the above range for the first threshold is beneficial to controlling the adsorption strength between the transportation component 20 and the tower 100 as needed, ensuring the safety of the transportation component 20 when moving relative to the tower 100.

[0118] In some optional embodiments, for the control system provided by an embodiment of the present application, the controller is connected to the docking member 22, and the controller is configured to:

[0119] When the motion acceleration value is less than or equal to the second threshold, control the docking member 22 to extend and be detachably connected to the transformer 300 through fasteners.

[0120] When the motion acceleration value is greater than the second threshold, keep the docking member 22 at its initial length.

[0121] Optionally, the second threshold is less than the first threshold. Optionally, the value range of the second threshold is 0.2 - 0.3 times the gravitational acceleration, including the two end values of 0.2 and 0.3.

[0122] The maintenance system provided by an embodiment of the present application obtains the second motion acceleration value of the floating foundation 600, and when the second motion acceleration value is less than or equal to the second threshold, controls the adsorption component 23 to adsorb on the tower 100 with the second adsorption strength and keeps the relative position with the tower 100 in a static state. The second adsorption strength is greater than the first adsorption strength, and controls the docking member 22 to extend and be detachably connected to the transformer 300 through fasteners, which can ensure the stability of the connection between the transportation component 20 and the tower 100 when the transportation component 20 is docked with the transformer 300. At the same time, it can ensure that the operator can enter the transformer 300 when the floating foundation 600 drives the tower 100 to shake within a full range, realizing the docking between the transformer 300 and the transportation component 20. And it can ensure the safety performance when the transportation component 20 is docked with the transformer 300, reducing the safety hazards of the operator.

[0123] In some optional embodiments, the controller is connected to the docking member 22 and is configured to:

[0124] When the docking member 22 is docked with the transformer 300 and the motion acceleration value is greater than the third threshold, control the docking member 22 to extend and push against the transformer 300.

[0125] It can be to obtain the motion acceleration value of the floating foundation 600 during the descent of the transformer 300 to be repaired or replaced and during the ascent of the transformer 300 after maintenance or replacement.

[0126] The value range of the third threshold is 0.5 - 0.7 times the gravitational acceleration, including the two end values of 0.5 and 0.7, and can be optionally 0.55, 0.6 or 0.65 times the gravitational acceleration.

[0127] The maintenance system provided by an embodiment of the present application, through the above settings, enables the transformer 300 to be repaired or replaced to stop ascending or descending once the floating foundation 600 shakes violently during the descent and during the ascent of the transformer 300 after maintenance or replacement. And it can increase the adsorption strength between the adsorption component 23 and the tower 100. At the same time, it can also control the docking member 22 to extend and push against the transformer 300, so that the transformer 300 is set at a certain angle relative to the vertical direction, and uses the component force of the gravity of the transformer 300 to achieve non-separation from the tower 100 as a whole, ensuring the safety of the replacement of the transformer 300 under the condition of relatively violent shaking of the floating foundation 600.

[0128] Such as Figure 4As shown, in some alternative embodiments, for the maintenance method and maintenance system provided in the above embodiments of the present application, for the disassembly tooling mentioned, the adsorption component 23 thereof may include a magnetic adsorption attachment 231, and the magnetic adsorption attachment 231 is either slidably connected or rotatably connected to the base body 21. The second driving member 24 is configured to drive the magnetic adsorption attachment 231 to move or rotate relative to the base body 21.

[0129] The magnetic adsorption attachment 231 and the base body 21 may be connected by a sliding connection. Of course, a rotational connection may also be used, and specifically, it can be determined according to the shape of the magnetic adsorption attachment 231.

[0130] When the magnetic adsorption attachment 231 and the base body 21 are slidably connected, the second driving member 24 may be configured to drive the magnetic adsorption attachment 231 to move relative to the base body 21, thereby causing the entire transportation assembly 20 to move along the tower 100. When the magnetic adsorption attachment 231 and the base body 21 are slidably connected, one second driving member 24 may be correspondingly provided for each adsorption component 23. By independently driving their respective adsorption components 23 through the second driving members 24, more than two adsorption components 23 can be divided into two groups and can be controlled by their respective second driving members 24, such that the magnetic adsorption attachments 231 of one group of adsorption components 23 are driven by the second driving member 24 and move relative to the tower 100 to a predetermined position. During the movement, the magnetic adsorption attachments 231 of the other group of adsorption components 23 are adsorbed on the tower 100. When the magnetic adsorption attachments 231 of one group move to the predetermined position, they are adsorbed on the tower 100 and remain fixed in position, such that the magnetic adsorption attachments 231 of the other group of adsorption components 23 are driven by the corresponding second driving member 24 and move relative to the tower 100 to the predetermined position. By setting alternately in this way, the entire transportation assembly 20 moves on the tower 100.

[0131] As Figure 6 shown, when the magnetic adsorption attachment 231 and the base body 21 are rotatably connected, the second driving member 24 may be configured to drive the magnetic adsorption attachment 231 to roll relative to the base body 21, thereby causing the entire transportation assembly 20 to move along the tower 100. When the magnetic adsorption attachment 231 and the base body 21 are connected by a rolling connection, more than two adsorption components 23 may be correspondingly provided for the same second driving member 24. Of course, more than two adsorption components 23 may also be respectively provided for one second driving member 24. One or more second driving members 24 may be used to drive the magnetic adsorption attachments 231 to roll synchronously, such that the entire transportation assembly 20 moves on the tower 100.

[0132] The controller may control the second driving member 24 to meet the movement requirements on the tower 100 by driving the magnetic adsorption attachment 231 to slide or roll relative to the tower.

[0133] The maintenance method and maintenance system provided by an embodiment of the present application enable the adsorption component 23 to include a magnetic adsorption accessory 231, so that the connection between the transportation component 20 and the tower 100 can be realized by using the magnetic adsorption function, which is beneficial to overcoming the gravity effect during the movement of the transportation component 20 on the tower 100 and ensuring the smoothness and safety of the movement.

[0134] As Figure 4 shown, in some alternative embodiments, an extended guiding portion 211 is provided on the base body 21, the magnetic adsorption accessory 231 is movably connected to the guiding portion 211, the second driving member 24 is configured to drive the magnetic adsorption accessory 231 to move along the guiding portion 211, and the magnetic adsorption accessory 231 is configured to be adsorbed and connected to the tower 100.

[0135] The maintenance method and maintenance system provided by an embodiment of the present application, by providing the guiding portion 211 and making the magnetic adsorption accessory 231 movably connected to the guiding portion 211, are beneficial to ensuring that the magnetic adsorption accessory 231 can move along a predetermined trajectory and its stability during the movement.

[0136] Optionally, the second driving member 24 can adopt the structural form of a telescopic cylinder, and of course, it can also adopt the form of a driving motor. When adopting the structural form of a driving motor, a transfer member can be provided, such as a gear-rack, a worm and worm gear, etc. transfer structure to connect the second driving member 24 and the magnetic adsorption accessory 231.

[0137] Exemplarily, the second driving member 24 can be made to adopt the structural form of a telescopic cylinder. Taking the number of adsorption components as two, the two adsorption components 23 are divided into two groups, with one adsorption component 23 in each group. When the transportation component needs to move as a whole along the tower 100, the controller can control the upper adsorption component 23 to adsorb on the tower 100, release the lower adsorption component 23, and control the second driving member 24 connected to the upper adsorption component 23 to extend. Due to the adsorption of the upper adsorption component, the second driving member drives the base body 21 and the lower adsorption component 23 to move relative to the tower 100 until the upper adsorption component 23 reaches the limit position of the guiding portion 211. Then control the lower adsorption component 23 to adsorb on the tower 100, release the upper adsorption component 23, and control the second driving member 24 connected to the lower adsorption component 23 to extend, so that the base body 21 and the upper adsorption component 23 move synchronously. In this way, by alternating, the movement requirement of the transportation component 20 as a whole on the tower 100 is completed.

[0138] Optionally, the magnetic adsorption accessory 231 can adopt the structural form of a magnet, and the electromagnetic adsorption method can be optionally adopted, which is beneficial to the control of the magnetic adsorption force.

[0139] As Figure 6As shown, in some optional embodiments, a maintenance method and a maintenance system provided by an embodiment of the present application, the magnetic adsorption component 231 is in the shape of a rotating wheel, the magnetic adsorption component 231 is rotatably connected to the base 21, and the second driving component 24 is configured to drive the magnetic adsorption component 231 to rotate relative to the base 21.

[0140] When the magnetic adsorption member 231 is in the shape of a rotating wheel, the second driving member 24 can use a power source such as a driving motor to drive each magnetic adsorption member 231 to rotate synchronously, so that the magnetic adsorption member 231 can move along the tower 100 while ensuring the magnetic adsorption connection with the tower 100.

[0141] like Figure 7 , Figure 8 As shown, in some optional embodiments, a maintenance method and a maintenance system provided by an embodiment of the present application, the adsorption component 23 may also include a suction cup 232, the suction cup 232 is connected to the magnetic adsorption component 231, and the magnetic adsorption component 231 is configured to be adsorbed and connected to the tower 100 through the suction cup 232.

[0142] A box-type transformer replacement device provided in an embodiment of the present application enables the adsorption component 23 to also include a suction cup 232, thereby facilitating the realization of a dual adsorption effect of suction cup adsorption and magnetic adsorption, ensuring the connection strength between the adsorption component 23 and the tower 100, and improving the overall safety of the box-type transformer replacement device during operation on the tower 100.

[0143] Optionally, when the magnetic adsorption member 231 adopts a polygonal columnar structure, the number of suction cups 232 connected to the magnetic adsorption member 231 may be one, or more than two, or one. The magnetic adsorption member 231 may be provided with a suction cup 232 on at least one end face away from the base 21. When the magnetic adsorption member 231 is magnetically adsorbed to the tower 100, the suction cup 232 may be squeezed so that the suction cup 232 is adsorbed to the tower 100, thereby ensuring the adsorption requirement between the transport device and the tower 100.

[0144] Optionally, when the magnetic adsorption member 231 is in the shape of a rotating wheel, a suction cup 232 may be provided on the rotating circumference of the magnetic adsorption member 231, and the number of the suction cups 232 may be two or more and spaced apart along the rotating circumference. Through the above arrangement, the magnetic adsorption member 23 can also achieve the connection requirement with the tower 100 through the suction cups 232 in the corresponding area during the rotation process.

[0145] In some optional embodiments, a maintenance method and a maintenance system provided by an embodiment of the present application, the adsorption component 23 further includes a vent 233 and an air pump 234, the vent 233 is in communication with the inner cavity of the suction cup 232 and the air pump 234, and the air pump 234 is configured to extract gas from the suction cup 232 or to pump gas into the suction cup 232. When used in a maintenance system, the controller can be in communication with the air pump to control the start, stop, and timing of inflation and deinflation of the air pump.

[0146] By providing the air pump 234 and the vent pipe 233, when the suction cup 232 needs to be connected to the tower 100, the air pump 234 can also be used to suck the gas in the suction cup 232, so that the air pressure in the suction cup 232 is lower than the external air pressure, and under the action of the external atmospheric pressure, the suction cup 232 can be stably adsorbed on the tower 100. When the corresponding magnetic adsorption component 231 needs to be separated from the tower 100, the air pump 234 can be used to blow air into the suction cup 232, so that the air pressure in the suction cup 232 is consistent with the external atmospheric pressure, and the suction cup 232 can be separated from the tower 100.

[0147] An embodiment of the present application provides a maintenance method and a maintenance system, wherein the disassembly tooling involved enables the adsorption component 23 to further include a vent pipe 233 and an air pump 234, and utilizes negative pressure adsorption and release between the suction cup 232 and the tower 100 to improve the response speed of the suction cup 232.

[0148] like Figure 4 , Figures 6 - 8 As shown, in some optional embodiments, a maintenance method and a maintenance system provided by an embodiment of the present application, wherein the docking piece 22 of the disassembly tooling involved includes a telescopic cylinder 221 and a connector 222, the telescopic cylinder 221 is connected between the connector 222 and the base 21, and the docking piece 22 is docked with the transformer 300 through the connector 222.

[0149] The docking member 22 adopts the above-mentioned structural form. When the transport assembly 20 moves to the predetermined position of the tower 100, the telescopic cylinder 221 is controlled to extend, so that the connector 222 moves to the side where the transformer 300 is located and docks with the docking port reserved for the transformer 300, thereby ensuring the connection requirements with the transformer 300. In the process of lowering the transformer 300, the transport assembly 20 is always clamped between the transformer 300 and the tower 100, thereby avoiding collision between the transformer 300 and the tower 100 and ensuring the connection strength.

[0150] In some optional embodiments, a maintenance method and a maintenance system provided by an embodiment of the present application involve a lifting assembly 10 of a disassembly tool and further includes a sling 13 , and the sling 13 is connected to a side of the connecting rope 12 facing away from the first driving member 11 .

[0151] The shape of the sling 13 can match the shape of the transformer 300. The sling 13 can be connected to the interface reserved by the transformer 300. By providing the sling 13, it is beneficial for the docking between the connecting cable 12 and the transformer 300, ensuring the safety and stability during the hoisting process of the transformer 300.

[0152] When implementing the maintenance method, the first driving member 11 of the lifting assembly 10 can be arranged in the nacelle 200, and the connecting cable 12 can be docked with the transformer 300. When the sling 13 is included, the connecting cable 12 can be docked with the transformer 300 through the sling 13.

[0153] Although the present invention has been described with reference to the preferred embodiments, various improvements can be made to it and components therein 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. A transformer maintenance method for a floating wind turbine, wherein the floating wind turbine comprises a floating foundation, a tower, a nacelle, and a transformer arranged outside the nacelle. It is characterized in that The maintenance method comprises: A disassembly tool is provided, the disassembly tool comprising a lifting assembly and a conveying assembly, the lifting assembly comprising a first driving member and a connecting rope, the first driving member being connected to the connecting rope and capable of retracting and releasing the connecting rope, the conveying assembly comprising a base and a docking member arranged on the base, two or more adsorption components and a second driving member, the adsorption component being configured to be adsorbed and connected to a tower and having an adjustable adsorption force, the second driving member being connected to the adsorption component and configured to drive the adsorption component to move; Connecting the lifting assembly to the cabin, arranging the transport assembly on a side of the tower away from the cabin and adsorbing it to the tower with a first adsorption strength; Controlling the second driving member to drive the adsorption component to move relative to the base, so that the transport assembly as a whole moves along the height direction of the tower toward the side where the cabin is located to a predetermined position; Controlling the docking piece to dock with the transformer; Separating the transformer from the nacelle, controlling the first driving member to release the connecting rope, and controlling the transport assembly to abut against the tower, so that the transformer is lowered to the floating foundation; Maintain the transformer or replace it with a new one and connect it to the transport assembly; The first driving member is controlled to retract the connecting rope, and the transporting assembly is controlled to abut against the tower, so that the transformer after maintenance or replacement is lifted to the nacelle and connected to the nacelle.

2. The transformer maintenance method according to claim 1, It is characterized in that The step of controlling the second driving member to drive the adsorption component to move relative to the base so that the transport assembly as a whole moves to a predetermined position along the height direction of the tower toward the side where the cabin is located, comprises: Acquiring a first motion acceleration value of the floating foundation; When the first motion acceleration value is less than or equal to a first threshold, the second driving member is controlled to drive the adsorption component to move relative to the base, so that the transport assembly as a whole moves along the height direction of the tower toward the side where the cabin is located to a predetermined position.

3. The maintenance method according to claim 2, It is characterized in that When the first motion acceleration value is greater than the first threshold, the adsorption component is controlled to be adsorbed to the tower with a second adsorption strength and to be in a stationary state relative to the tower, and the second adsorption strength is greater than the first adsorption strength.

4. The maintenance method according to claim 1, It is characterized in that The step of docking the docking piece with the transformer comprises: Acquiring a second motion acceleration value of the floating foundation; When the second motion acceleration value is less than or equal to a second threshold, the adsorption component is controlled to be adsorbed on the tower with a second adsorption strength and to be in a static state relative to the tower, the second adsorption strength is greater than the first adsorption strength, and the docking piece is controlled to extend and be detachably connected to the transformer through a fastener.

5. The maintenance method according to claim 4, wherein, when the second motion acceleration value is greater than the second threshold, controlling the adsorption component to adsorb to the tower with a second adsorption strength and the relative position with the tower being in a stationary state, the second adsorption strength being greater than the first adsorption strength, and maintaining the docking component at the initial length.

6. The maintenance method according to any one of claims 1 to 5, wherein, after the step of docking the docking component with the transformer, the maintenance method further includes: acquiring a third motion acceleration value of the floating foundation; when the third motion acceleration value is greater than a third threshold, controlling the first driving member to stop releasing or retracting the connecting cable, controlling the adsorption component to adsorb to the tower with a second adsorption strength and the relative position with the tower being in a stationary state, the second adsorption strength being greater than the first adsorption strength, and controlling the docking component to extend and push against the transformer so that the center line of the transformer is inclined with respect to the height direction of the tower.

7. A maintenance system for a transformer for a floating wind turbine, the floating wind turbine including a floating foundation, a tower, a nacelle, and a transformer disposed outside the nacelle, wherein, the maintenance system includes: a disassembly tooling, including a lifting assembly and a transporting assembly, the lifting assembly including a first driving member and a connecting cable, the first driving member being connected to the connecting cable and capable of retracting and releasing the connecting cable, the transporting assembly including a base body and a docking component, more than two adsorption components, and a second driving member disposed on the base body, each adsorption component being configured to be adsorbed and connected to the tower with an adjustable adsorption force, the second driving member being connected to the adsorption component and configured to drive the adsorption component to move, the lifting assembly being disposed in the nacelle, and the connecting cable being configured to be connected to the transformer; a controller, connected to the adsorption component and the second driving member, the controller being configured to control the second driving member to drive the adsorption component to move relative to the base body so that the entire transporting assembly moves along the height direction of the tower towards the side where the nacelle is located or towards the side away from the side where the nacelle is located, and to control the value of the adsorption force of the adsorption component adsorbed to the tower.

8. The maintenance system according to claim 7, wherein, the maintenance system further includes a collector disposed on the floating foundation, the collector being configured to acquire the motion acceleration value of the floating foundation; the controller being configured to: when the motion acceleration value is less than or equal to a first threshold, controlling the adsorption component to adsorb to the tower with a first adsorption strength, and controlling the second driving member to drive the adsorption component to move relative to the base body so that the entire transporting assembly moves along the height direction of the tower towards the side where the nacelle is located to a predetermined position; when the motion acceleration value is greater than the first threshold, controlling the adsorption component to adsorb to the tower with a second adsorption strength and the relative position with the tower being in a stationary state, the second adsorption strength being greater than the first adsorption strength.

9. The maintenance system according to claim 8, wherein, the controller is connected to the docking member, and the controller is configured to: when the motion acceleration value is less than or equal to the second threshold, control the docking member to extend and connect with the transformer; when the motion acceleration value is greater than the second threshold, keep the docking member at the initial length.

10. The maintenance system according to claim 8, wherein, the controller is connected to the docking member, and the controller is configured to: when the docking member is docked with the transformer and the motion acceleration value is greater than the third threshold, control the docking member to extend and push the transformer.

Images