Bending deformation correction system, blade, wind generating set and control method

Abstract

The invention discloses a bending deformation correction system, a blade, a wind generating set and a control method.The bending deformation correction system comprises a correction device, a sensor module and a controller, bending deformation information of the blade is measured in real time through the sensor module, and the bending deformation information is transmitted to the controller; the controller determines correction force information used for correcting bending deformation according to the bending deformation information and generates a control instruction for a driving part in the correction device based on the correction force information, the driving part moves according to the control instruction so as to generate pulling force, the pulling force is transmitted to a pulling force steering mechanism located on the blade accessory on one side through a rope, and the blade accessory is driven to rotate. Correcting force opposite to the deformation direction is applied to the blade accessory through the tension steering mechanism, so that the bending deformation of the blade can be reduced, the vibration of the blade is reduced, and the load of the blade is reduced.

Description

Technical Field

[0001] The present application belongs to the field of wind power generation technology, and in particular relates to a bending deformation correction system, a blade, a wind turbine generator set and a control method. Background Art

[0002] As the diameter of wind turbine impellers continues to increase, blade flexibility further increases, blade aeroelastic damping rapidly decreases, and the risk of impeller stability becomes increasingly prominent. Blade vibration has become a key factor in unit safety. At present, the main way to reduce blade vibration is to increase blade aerodynamic damping. The relevant technologies mainly use the following methods to increase blade aerodynamic damping: increase blade material damping, use simple pendulum dampers, liquid dampers, etc., change blade aerodynamic shape or pitch.

[0003] However, although the long flexible blade has a large structural deformation as a whole, the local bending deformation is very small, that is, the local curvature change is small, so the traditional method of increasing material damping contributes little to blade vibration reduction. When the blade is rotating, it will generate a large centrifugal force, so the frequency of traditional single pendulum dampers, liquid dampers, etc. is greatly affected by the centrifugal force, so it is difficult to achieve the purpose of vibration reduction. In addition, the damper generally needs to be installed in the middle or tip of the blade. The blade space is limited, and the damper installation and operation space are severely constrained. Wind turbines mainly rely on the specific airfoil of the blade to provide sufficient lift to ensure the stable operation of the unit. The traditional method of increasing aerodynamic damping by changing the aerodynamic shape of the blade will seriously affect the operating efficiency and stability of the unit, and cannot be used in blade vibration reduction. Although the wind turbine motor pitch can increase the blade aerodynamic damping to a certain extent and achieve blade vibration reduction and load reduction, frequent pitch changes often cause excessive damage to the pitch bearing. It can be seen that due to the special operating conditions of wind turbines, the blade operating environment and working conditions are very bad, making it difficult to implement traditional vibration reduction and load reduction measures. Summary of the invention

[0004] The embodiments of the present application provide a bending deformation correction system, a blade, a wind turbine generator set, a control method, a device, a equipment, a storage medium and a program, which can correct the bending deformation of the blade, thereby reducing blade vibration and reducing blade load.

[0005] In a first aspect, an embodiment of the present application provides a bending deformation correction system for a blade, wherein the blade includes a shell and blade attachments arranged in pairs, wherein the shell includes a blade tip portion and a blade root portion opposite to each other in its own axial direction, and the blade attachment includes at least one of a web and a main beam, and the system includes:

[0006] A correction device comprises a driving member and a plurality of force applying units distributed along the axial direction, each force applying unit comprises a rope and a tension steering mechanism arranged one-to-one in a first direction, one of the tension steering mechanisms arranged oppositely is arranged on one of the blade attachments arranged in pairs, the other of the tension steering mechanisms arranged oppositely is arranged on the other of the blade attachments arranged in pairs, the tension steering mechanisms arranged oppositely are located at the same measuring point section of the blade, the measuring point section is a cross section of the blade along the axial direction, the first direction intersects with the axial direction, one rope end of the rope is connected to one of the tension steering mechanisms arranged oppositely, the other rope end of the rope is connected to the other of the tension steering mechanisms arranged oppositely, and the main rope of the rope is drivingly connected to the driving member;

[0007] A sensor module is disposed on the blade, and the sensor module is configured to collect bending deformation information of the blade;

[0008] The controller is configured to control the movement of the driving member according to the bending deformation information, so as to drive the multiple force applying units to apply a correction force for correcting the bending deformation of the blade to one of the blade attachments arranged in pairs.

[0009] In a second aspect, an embodiment of the present application provides a blade, comprising:

[0010] A casing, wherein the casing includes a blade tip portion and a blade root portion opposite to each other in its axial direction;

[0011] Blade attachments, which are arranged in pairs and are arranged in the shell, and the blade attachments include at least one of a web and a main beam;

[0012] A bending deformation correction system as in the first aspect.

[0013] In a third aspect, an embodiment of the present application provides a wind turbine generator set, including: a blade as described in the second aspect.

[0014] In a fourth aspect, an embodiment of the present application provides a bending deformation correction control method, which is applied to the controller of the first aspect, and the method includes:

[0015] Obtaining bending deformation information of cross sections at multiple measuring points in the blade, the bending deformation information including bending deformation amount and bending deformation direction;

[0016] In response to the presence of a deformation measuring point cross section whose bending deformation is greater than a deformation threshold, obtaining vibration information of the deformation measuring point cross section;

[0017] Determine the target correction force corresponding to the blade according to the bending deformation information and vibration information of the cross section of the deformation measuring point;

[0018] Determining a target corrective torque corresponding to the driving member based on the target corrective force;

[0019] The driving member is controlled to output a target correcting torque to drive a plurality of force applying units installed in the blade to apply a target correcting force to one of the blade attachments arranged in pairs in the blade.

[0020] In a fifth aspect, an embodiment of the present application provides a bending deformation correction control device, which is applied to the controller of the first aspect, and the device includes:

[0021] A first acquisition module is used to acquire bending deformation information of a plurality of measuring point cross sections in the blade, wherein the bending deformation information includes a bending deformation amount and a bending deformation direction;

[0022] A second acquisition module is used to acquire vibration information of the deformation measuring point section in response to the presence of a deformation measuring point section whose bending deformation is greater than the deformation threshold;

[0023] A correction force determination module is used to determine the target correction force corresponding to the blade according to the bending deformation information and vibration information of the cross section of the deformation measurement point;

[0024] A correction torque determination module, used to determine a target correction torque corresponding to the driving member based on the target correction force;

[0025] The control module is used to control the drive member to output a target correction torque to drive a plurality of tension steering mechanisms installed in the blade to correct the bending deformation of the blade.

[0026] In a sixth aspect, an embodiment of the present application provides an electronic device, the device comprising: a processor and a memory storing computer program instructions;

[0027] When the processor executes the computer program instructions, the bending deformation correction control method as described in the fourth aspect is implemented.

[0028] In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium, on which computer program instructions are stored. When the computer program instructions are executed by a processor, the bending deformation correction control method as described in the fourth aspect is implemented.

[0029] In an eighth aspect, an embodiment of the present application provides a computer program product. When instructions in the computer program product are executed by a processor of an electronic device, the electronic device executes the bending deformation correction control method as described in the fourth aspect.

[0030] The bending deformation correction system, blade, wind turbine generator set, control method, device, equipment, storage medium and program of the embodiment of the present application, the system includes a correction device, a sensor module and a controller, the sensor module measures the bending deformation information of the blade in real time, and transmits the bending deformation information to the controller, the controller determines the correction force information for correcting the bending deformation according to the bending deformation information, and generates a control instruction for the driving member in the correction device based on the correction force information, the driving member moves according to the control instruction, thereby generating a tension on one side, the tension is transmitted to the tension steering mechanism located on the blade attachment on one side through a rope, and the tension steering mechanism applies a correction force opposite to the deformation direction to the blade attachment, so that the bending deformation of the blade can be reduced, thereby reducing the blade vibration and reducing the blade load. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0032] Figure 1(a) is a schematic longitudinal section of a blade;

[0033] Figure 1(b) is a schematic cross-sectional view of a blade;

[0034] Figure 2 is a schematic diagram of a bending deformation correction system provided in an embodiment of the present application;

[0035] Figure 3 is a schematic diagram of a cross section of a measuring point provided in an embodiment of the present application;

[0036] Figure 4 is a top view of a tension steering mechanism 421 provided in an embodiment of the present application;

[0037] Figure 5 is a side view of the tension steering mechanism 421 provided in the embodiment of the present application

[0038] Figure 6 is a schematic diagram of a locking assembly 425 provided in an embodiment of the present application;

[0039] Figure 7 It is a flow chart of a bending deformation correction control method provided in an embodiment of the present application;

[0040] Figure 8 is a control logic diagram of a controller provided in an embodiment of the present application;

[0041] Fig. 9 is a schematic diagram of a bending deformation correction control device provided in an embodiment of the present application;

[0042] Fig.10 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0045] The embodiment of the present application provides a bending deformation correction system, which is applied to a blade and used to correct the bending deformation of the blade to reduce the blade vibration caused by the bending deformation of the blade. The blade includes a shell and a pair of blade attachments, the shell includes a blade tip and a blade root portion opposite to each other in its own axial direction, and the blade attachment includes at least one of a web and a main beam.

[0046] Exemplarily, see FIG1 for a schematic diagram of a blade provided in an embodiment of the present application, wherein FIG1(a) is a schematic diagram of a longitudinal section of the blade, and FIG1(b) is a schematic diagram of a cross-sectional view of the blade. As shown in FIG1(a), the blade includes a shell 10, and the shell 10 includes a blade tip portion 101 and a blade root portion 102 that are opposite in its own axial direction. As shown in FIG1(b), the shell 10 of the blade includes a web and a main beam arranged in pairs, wherein the web arranged in pairs may include a leading edge web 21 and a trailing edge web 22, and the main beam arranged in pairs may include a windward main beam 31 and a leeward main beam 32.

[0047] In some embodiments of the present application, a bending deformation correction system may include a correction device, a sensor module and a controller.

[0048] Wherein, the correction device is arranged inside the shell of the blade, including a driving member and a plurality of force-applying units distributed along the axial direction, each force-applying unit includes a rope and a tension steering mechanism arranged one-to-one opposite to each other in a first direction, one of the oppositely arranged tension steering mechanisms is arranged on one of the blade accessories arranged in a pair, the other of the oppositely arranged tension steering mechanisms is arranged on the other of the blade accessories arranged in a pair, the oppositely arranged tension steering mechanisms are located at the same measuring point section of the blade, the measuring point section is the cross-section of the blade along the axial direction, the first direction intersects with the axial direction, one rope end of the rope is connected to one of the oppositely arranged tension steering mechanisms, the other rope end of the rope is connected to the other of the oppositely arranged tension steering mechanisms, and the main rope of the rope is transmission-connected to the driving member.

[0049] The sensor module is arranged on the blade, and is configured to collect bending deformation information of the blade, wherein the bending deformation information includes but is not limited to the bending deformation direction, the bending deformation amount, and the like.

[0050] The controller is configured to control the movement of the driving member according to the bending deformation information, so as to drive the multiple force applying units to apply a correction force for correcting the bending deformation of the blade to one of the blade attachments arranged in pairs.

[0051] The reason why the blade is bent and deformed is usually due to the unbalanced force on both sides of the blade in the bending deformation direction, so that the blade bends from the side with greater force to the side with less force under the action of external force. Based on this, when correcting the bending deformation of the blade, a correction force opposite to the bending deformation direction can be applied to the side of the blade with less force through a correction device to offset at least part of the external force causing the deformation, thereby achieving the purpose of reducing the bending deformation. Therefore, each time the bending deformation of the blade is corrected, the driving member can apply a force-applying unit set on the blade attachment of the blade on the side with less force, that is, drive multiple force-applying units to apply a correction force for correcting the bending deformation of the blade to one of the paired blade attachments.

[0052] In some embodiments of the present application, the deformation direction of the blade bending deformation is mainly divided into the blade chord direction and the blade thickness direction. Based on this, in actual implementation, the force-applying units in the correction device can be set on the webs or main beams arranged in pairs according to the deformation direction of the bending deformation to be corrected. For example, when the bending deformation direction to be corrected is the blade chord direction, multiple force-applying units can be set on the webs arranged in pairs. When the bending deformation direction to be corrected is the blade thickness direction, multiple force-applying units can be set on the main beams arranged in pairs. When it is necessary to correct both the bending deformation in the blade chord direction and the bending deformation in the blade thickness direction, two sets of correction devices can be set in the blade, wherein multiple force-applying units in one set of correction devices are set on the webs arranged in pairs, and multiple force-applying units in the other set of correction devices are set on the main beams arranged in pairs.

[0053] In some embodiments of the present application, for each force-applying unit, when the force-applying unit is arranged on a pair of webs, one of the one-to-one relatively arranged tension steering mechanisms in the force-applying unit is arranged on the leading edge web 21, and the other is relatively arranged on the trailing edge web 22; when the force-applying unit is arranged on a pair of main beams, one of the one-to-one relatively arranged tension steering mechanisms in the force-applying unit is arranged on the windward side main beam 31, and the other is relatively arranged on the leeward side main beam 32.

[0054] In some embodiments of the present application, the bending deformation correction system is applied to the blade as shown in FIG. 1 to correct the bending deformation of the blade chordwise. Figure 2 As shown, the correction device is installed inside the shell 10 of the blade, wherein the driving member 41 is arranged at the root of the blade, and each of the multiple force applying units distributed along the axial direction includes a rope 422 and a tension steering mechanism 421 arranged on the leading edge web 21 and a tension steering mechanism 423 arranged on the trailing edge web 22. Among them, one rope end of the rope 422 is connected to the tension steering mechanism 421, the other rope end of the rope 422 is connected to the tension steering mechanism 423, and the main rope of the rope 422 is connected to the driving member 41 in transmission.

[0055] like Figure 2 As shown, the tension steering mechanism 421 and the tension steering mechanism 423 are arranged one-to-one on the leading edge web 21 and the trailing edge web 22. And the tension steering mechanism 421 and the tension steering mechanism 423 arranged opposite to each other are located at the same measuring point section of the blade. Figure 3 , is a schematic diagram of a cross section of a measuring point in the blade, such as Figure 3 As shown, the tension deflection mechanism 421 and the tension deflection mechanism 423 are arranged one-to-one on the leading edge web 21 and the trailing edge web 22 .

[0056] The sensor module 50 is disposed on the blade shell 10 and is used to collect bending deformation information of the cross section of the measuring point. Exemplarily, the sensor module 50 may include a plurality of deformation sensors capable of detecting deformation, and the plurality of deformation sensors are used to collect bending deformation information of each of the cross sections of the plurality of measuring points in the blade.

[0057] The controller 60 is connected to the sensor module 50 and the drive member 41 for communication, and is used to obtain the bending deformation information collected by the sensor module 50 and control the movement of the drive member 41. The installation position of the controller 60 can be set according to the actual situation, and can be set inside the blade or outside the blade. Figure 2 , is only an example and does not constitute a limitation on the installation position of the controller 60.

[0058] In actual applications, the bending deformation information of the blade can be collected through the sensor module 50, and the bending deformation information can be transmitted to the controller 60. The controller 60 calculates the correction force information according to the bending deformation information of the blade, generates a control instruction for the drive member 41 in the correction device according to the correction force information, and transmits the control instruction to the drive member 41. In this way, the drive member 41 generates a control torque according to the control instruction of the controller 60, pulls one side of the rope 422, and at the same time, the other side of the rope 422 is loosened, and the tension on the pulled side of the rope 422 is transmitted to the tension steering mechanism 421 or the tension steering mechanism 423 arranged on the blade web on that side. After the tension is redirected by the tension steering mechanism 421 or the tension steering mechanism 423, a blade deformation correction force opposite to the blade bending deformation direction is applied to the leading edge web 21 or the trailing edge web 22 of the blade, thereby reducing blade deformation, and then reducing blade vibration and reducing blade load.

[0059] For the correction of bending deformation in the thickness direction of the blade, the principle is the same as the above method, except that the installation position of the paired force-applying units is replaced by the blade main beam instead of the blade web. To avoid repetition, it will not be described here.

[0060] The bending deformation correction system provided in this embodiment includes a correction device, a sensor module and a controller. The sensor module measures the bending deformation information of the blade in real time and transmits the bending deformation information to the controller. The controller determines the correction force information for correcting the bending deformation according to the bending deformation information, and generates a control instruction for the driving member in the correction device based on the correction force information. The driving member moves according to the control instruction, thereby generating a pulling force on one side. The pulling force is transmitted to a tension steering mechanism located on a blade attachment on one side through a rope. The tension steering mechanism applies a correction force opposite to the deformation direction to the blade attachment. In this way, the bending deformation of the blade can be reduced, thereby reducing the blade vibration and reducing the blade load.

[0061] In addition, when using the bending deformation correction system provided in the embodiment of the present application to achieve vibration reduction and load reduction of the blade, it will not be subject to boundary constraints such as the deformation curvature, centrifugal force, and space of the blade. The bending deformation correction system is installed inside the blade shell and does not affect the aerodynamic shape of the blade. Moreover, the use of an independent system for correction will not cause load transfer.

[0062] Furthermore, by correcting the bending deformation, the maximum stress level of the blade cross section can be reduced, and blade damage caused by extreme working conditions can be avoided. By correcting the bending deformation, the stress amplitude of the blade cross section can be reduced, fatigue can be reduced, and the blade service life can be increased. By correcting the bending deformation, blade deformation can be reduced and the risk of tower sweep during blade operation can be avoided. By correcting the bending deformation, the blade vibration level can also be reduced, and the operating stability and reliability of the entire machine can be improved.

[0063] In some possible embodiments of the present application, the structures of the tension steering mechanisms used in the bending deformation correction system are the same, and the components of the tension steering mechanisms may include: an anchor assembly and a reversing assembly. The anchor assembly and the reversing assembly are both arranged on the surface of the blade attachment. The rope end connected to the tension steering mechanism in the rope is connected to the anchor assembly, and at least part of the main rope in the rope is arranged around the reversing assembly.

[0064] Among them, the anchoring assembly is used to anchor the rope end connected to the tension steering mechanism in the rope, and the reversing assembly is used to steer the rope, that is, one end of the rope is connected to the anchoring assembly, and the other end is reversed by the reversing assembly and extends in the direction of the driving member.

[0065] The reason why a reversing assembly is set in the tension steering mechanism is that when the driving part moves, the force transmitted to the position of the tension steering mechanism through the rope is a tensile force along the radial direction of the blade, that is, a force parallel to the installation position of the tension steering mechanism, and the correction of the bending deformation of the blade requires a corrective force in the chord direction or thickness direction, that is, a force perpendicular to the installation position of the tension steering mechanism. Therefore, in order to apply a corrective force to the installation position of the tension steering mechanism, the reversing assembly is used to reverse the direction of the force, thereby changing the direction of the force.

[0066] In some embodiments of the present application, taking the tension steering mechanism 421 as an example, see Figure 4 is a top view of the tension steering mechanism 421, and the top view direction is from the blade tip to the blade root. Figure 4As shown, the tension steering mechanism 421 includes an anchoring assembly 4211 and a reversing assembly 4212, wherein the anchoring assembly 4211 and the reversing assembly 4212 are both arranged on the leading edge web 21, wherein one rope end of the rope 422 is connected to the anchoring assembly 4211, and the main rope of the rope 422 is arranged around a portion of the reversing assembly 4212, so that the rope end of the rope 422 away from the anchoring assembly 4211 is converted from extending in the chord direction to extending in the blade root direction, so that the force transmitted from the blade root through the rope 422 to the anchoring assembly 4211 can be converted from radial tension to a corrective force opposite to the blade deformation direction, thereby realizing the correction of the blade bending deformation.

[0067] In some possible implementations of the present application, the anchoring assembly and the reversing assembly of each tension steering mechanism may be arranged on the blade attachment by a non-detachable connection method, wherein the non-detachable connection method includes but is not limited to welding, gluing, riveting, etc.

[0068] By setting them in a non-detachable connection mode, the anchoring assembly and the reversing assembly can be more firmly set on the blade attachment, thereby improving the installation reliability of the anchoring assembly and the reversing assembly.

[0069] In some possible embodiments of the present application, the anchoring assembly and the reversing assembly of each tension steering mechanism can also be set on the blade attachment through a detachable connection method, wherein the detachable connection method includes but is not limited to threaded connection, pin connection, elastic deformation connection, lock connection, plug-in connection, etc.

[0070] By setting it in a detachable connection mode, the anchoring component and the reversing component can be easily replaced.

[0071] In some possible implementations of the present application, components of the anchor assembly of the tension steering mechanism may include:

[0072] An anchor support, arranged on the surface of the blade attachment;

[0073] An anchor wheel, arranged on the anchor support and rotatably connected to the anchor support;

[0074] Wherein, a rope end in the rope connected with the tension steering mechanism is provided with a sleeve, and the sleeve is sleeved on the anchor wheel.

[0075] In some embodiments of the present application, the material of the ring may be a wear-resistant material, including but not limited to carbon steel, alloy steel, stainless steel, high-strength steel, etc.

[0076] In some embodiments of the present application, taking the tension steering mechanism 421 as an example, see Figure 5 , which is a side view of the tension steering mechanism 421, as shown Figure 5As shown, the anchor assembly 4211 may include an anchor support 42111 and an anchor wheel 42112. The anchor support 42111 is arranged on the leading edge web 21, and the anchor wheel 42112 is supported on the anchor support 42111 and is rotatably connected to the anchor support 42111. A ring 4221 is arranged at one end of the rope 422 connected to the tension steering mechanism 421, and the ring 4221 is sleeved on the anchor wheel 42112.

[0077] In the above manner, the rope and the anchor assembly are connected by the ring, which can prevent the rope from being excessively bent and worn.

[0078] In some possible implementations of the present application, components of the reversing assembly of the tension steering mechanism may include:

[0079] A reversing support, arranged at the blade attachment;

[0080] A reversing wheel, arranged on the reversing support and rotatably connected to the reversing support;

[0081] Wherein, at least part of the main rope in the rope is arranged around the reversing wheel, so that the part of the rope away from the anchoring assembly converges toward the driving member.

[0082] In some embodiments of the present application, Figure 5 As shown, the reversing assembly 4212 in the tension steering mechanism 421 may include a reversing support 42121 and a reversing wheel 42122, wherein the reversing support 42121 is arranged on the leading edge web 21, and the reversing wheel 42122 is supported on the reversing support 42121 and is rotatably connected to the reversing support 42121. Part of the main rope of the rope 422 is arranged around the reversing wheel 42122, so that the part of the rope 422 away from the anchor assembly 4211 is converged toward the driving member 421.

[0083] In this way, by steering the rope through the steering wheel, the force transmitted through the rope can be converted from the radial tension of the blade to the correction force corresponding to the deformation direction of the blade.

[0084] In some possible implementations of the present application, the driving member may include a driving motor having an output shaft, and at least a portion of the main rope in the rope is wound around the output shaft.

[0085] In this way, when the input shaft of the driving motor rotates, only the rope on one side will be tightened, and the rope on the other side will be loosened, thereby correcting the bending deformation of the blade.

[0086] In some embodiments of the present application, see Figure 2When the blade bending deformation direction is from the blade trailing edge to the blade leading edge, the driving motor in the driving member 41 pulls the rope 422 on one side of the leading edge web 21 to transmit the pulling force to the tension steering mechanism 421 through the rope 422, and then the tension steering mechanism 421 applies a corrective force opposite to the blade bending deformation to the leading edge web 21. When the blade bending deformation direction is from the blade leading edge to the blade trailing edge, the driving motor in the driving member 41 pulls the rope 422 on one side of the trailing edge web 22 to transmit the pulling force to the tension steering mechanism 423 through the rope 422, and then the tension steering mechanism 423 applies a corrective force opposite to the blade bending deformation to the trailing edge web 22.

[0087] In some possible embodiments of the present application, since each force-applying unit includes a rope connected to relatively arranged tension steering mechanisms, and all ropes are connected to a driving member, in order to avoid entanglement of multiple ropes, the correction device may further include a locking assembly, which is used to gather all ropes into a rope bundle and connect the rope bundle to the driving member, thereby avoiding entanglement of the ropes.

[0088] In some embodiments of the present application, see Figure 5 After the rope 422 is connected to the tension steering mechanism 421, it is gathered with other ropes from the blade tip direction through the locking assembly 425 to form a rope bundle.

[0089] In some possible implementations of the present application, the locking assembly may include an upper wire collection ring and a lower wire collection ring that are symmetrically arranged, and both ends of the upper wire collection ring and the lower wire collection ring are locked by bolts.

[0090] In some embodiments of the present application, see Figure 6 The locking assembly 425 includes an upper wire collection ring 4251 and a lower wire collection ring 4252 which are symmetrically arranged. Both ends of the upper wire collection ring 4251 and the lower wire collection ring 4252 are locked by bolts 4253.

[0091] The locking assembly is used in conjunction with the upper wire collection ring, the lower wire collection ring and the bolt, so that the locking assembly can be suitable for locking and installing ropes of different thicknesses, thereby improving the overall applicability of the product.

[0092] In some possible implementations of the present application, the controller may be a programmable logic controller (PLC).

[0093] In practical applications, users can write a program for controlling the drive components based on the blade bending deformation information, download the program to the PLC, and the PLC can realize the designed functional requirements.

[0094] PLC has strong anti-interference ability, so using PLC can improve the reliability of the bending deformation correction system.

[0095] Based on the bending deformation correction system provided in the above embodiment, the present application also provides a specific implementation method of a blade. Please refer to the following embodiment.

[0096] The blade provided in the embodiment of the present application comprises: a shell, wherein the shell comprises a blade tip portion and a blade root portion opposite to each other in its axial direction;

[0097] Blade attachments, which are arranged in pairs and are arranged in the shell, and the blade attachments include at least one of a web and a main beam;

[0098] Bend correction system.

[0099] Among them, the structure of the bending deformation correction system is as described above, and will not be repeated here to avoid repetition.

[0100] In some possible embodiments of the present application, the blade attachment includes a web, and the relatively arranged tension deflection mechanisms are symmetrically distributed along the chord direction of the blade, and each tension deflection mechanism is arranged on a surface of one of the paired webs facing the other in the chord direction.

[0101] In some possible embodiments of the present application, the blade attachment includes a main beam, and the relatively arranged tension deflection mechanisms are symmetrically distributed along the thickness direction of the blade, and each tension deflection mechanism is arranged on the surface of one of the paired main beams facing the other on the thickness.

[0102] The blade provided in this embodiment includes a bending deformation correction system, which includes a correction device, a sensor module and a controller. The sensor module measures the bending deformation information of the blade in real time, and transmits the bending deformation information to the controller. The controller determines the correction force information for correcting the bending deformation according to the bending deformation information, and generates a control instruction for the driving member in the correction device based on the correction force information. The driving member moves according to the control instruction, thereby generating a pulling force on one side. The pulling force is transmitted to a pulling force steering mechanism located on a blade attachment on one side through a rope. The pulling force steering mechanism applies a corrective force opposite to the deformation direction to the blade attachment. In this way, the bending deformation of the blade can be reduced, thereby reducing the blade vibration and reducing the blade load.

[0103] Based on the blades provided in the above embodiments, the present application also provides a specific implementation method of a wind turbine generator set, as shown in the following embodiments.

[0104] A wind turbine generator set provided in an embodiment of the present application may include: a blade as described above, wherein the blade includes a shell, blade accessories, and a bending deformation correction system. The structure of the blade can be found in the above description, and will not be described here again to avoid repetition.

[0105] In addition to blades, a wind turbine generator set may also include major subsystems such as a nacelle and a tower, among which the nacelle includes a generator, a transmission system, etc.

[0106] The wind turbine generator set provided in this embodiment includes a bending deformation correction system, which includes a correction device, a sensor module and a controller. The sensor module measures the bending deformation information of the blade in real time and transmits the bending deformation information to the controller. The controller determines the correction force information for correcting the bending deformation according to the bending deformation information, and generates a control instruction for the driving member in the correction device based on the correction force information. The driving member moves according to the control instruction, thereby generating a pulling force on one side. The pulling force is transmitted to a pulling force steering mechanism located on a blade attachment on one side through a rope. The pulling force steering mechanism applies a corrective force opposite to the deformation direction to the blade attachment. In this way, the bending deformation of the blade can be reduced, thereby reducing the blade vibration and reducing the blade load.

[0107] Based on the bending deformation correction system provided in the above embodiment, the present application also provides a specific implementation of a bending deformation correction control method. Please refer to the following embodiment.

[0108] See also Figure 7 , is a flow chart of a bending deformation correction control method provided in an embodiment of the present application, the method is applied to a controller in a bending deformation correction system provided in any of the above embodiments, and is used to control a correction device in the bending deformation correction system to correct a blade, such as Figure 7 As shown, the method may include the following steps S71-S75.

[0109] S71. Obtain bending deformation information of cross sections at multiple measuring points in the blade, where the bending deformation information includes bending deformation amount and bending deformation direction.

[0110] The blade includes multiple measuring point sections, each measuring point section includes a one-to-one relatively arranged tension steering mechanism, wherein the bending deformation information of each measuring point section can be collected by a sensor module in the bending deformation correction system, the sensor module will collect the bending deformation information of the multiple measuring point sections in the blade, and transmit the collected bending deformation information to the controller, so that the controller can obtain the bending deformation information of the multiple measuring point sections in the blade.

[0111] S72. In response to the presence of a deformation measuring point cross section whose bending deformation is greater than a deformation threshold, obtain vibration information of the deformation measuring point cross section.

[0112] The deformation threshold can be set by the user according to actual conditions.

[0113] The deformation measuring point section refers to the measuring point section in the blade where the bending deformation is greater than the phase change threshold. When there is a deformation measuring point section in the blade, it means that the blade has been bent and deformed, and the bending deformation correction is required.

[0114] The bending deformation of the blade is usually related to the vibration of the blade. In order to correct the bending deformation of the blade, the vibration information of the cross section of the deformation measuring point is further obtained.

[0115] The vibration information of the cross section of the deformation measuring point may be collected by a vibration sensor arranged in the blade, and the vibration information may include but is not limited to vibration-related information such as vibration frequency and vibration amplitude.

[0116] S73. Determine the target correction force corresponding to the blade according to the bending deformation information and vibration information of the cross section of the deformation measurement point.

[0117] In order to correct the bending deformation of the blade, it is necessary to apply a target corrective force to the blade in the opposite direction to the bending deformation to offset the bending deformation force. The bending deformation force is the force that causes the blade to bend. The bending deformation force can be determined based on the bending deformation information and vibration information of the cross section of the deformation measuring point, and then the corresponding target corrective force can be determined.

[0118] S74. Determine the target corrective torque corresponding to the driving member based on the target corrective force.

[0119] Because the correction principle of the embodiment of the present application is to pull the rope through the driving member, transmit the tension to the tension steering mechanism through the rope, and then apply the correction force to the blades through the tension steering mechanism, rather than directly applying the target correction force to the blades, in order to enable the tension steering mechanism to apply the correction force to the blades, based on the existing relationship between force and torque, the target correction torque required for the driving member to generate the target correction force is determined.

[0120] S75. Control the driving member to output the target corrective torque to drive the multiple force-applying units installed in the blade to apply the target corrective force to one of the blade attachments arranged in pairs in the blade.

[0121] By controlling the drive member to output the target correction torque, the tension steering mechanism can apply the target correction force to the blade under the drive member's drive.

[0122] The bending deformation correction control method provided in the embodiment of the present application obtains the bending deformation information of multiple measuring point sections in the blade, the bending deformation information includes the bending deformation amount and the bending deformation direction, in response to the existence of a deformed measuring point section whose bending deformation amount is greater than the deformation amount threshold, obtains the vibration information of the deformed measuring point section, determines the target correction force corresponding to the blade according to the bending deformation information and vibration information of the deformed measuring point section, determines the target correction torque corresponding to the driving member based on the target correction force, and controls the driving member to output the target correction torque to drive multiple tension steering mechanisms installed in the blade to correct the bending deformation of the blade. According to this embodiment, the controller can issue instructions to the driving member based on the bending deformation information of the blade, so that the driving member applies a correction load on the surface of the blade attachment through the rope and the tension steering mechanism, thereby suppressing the bending deformation of the blade and reducing vibration and load.

[0123] In some possible implementations of the present application, determining the target correction force corresponding to the blade according to the bending deformation information and vibration information of the cross section of the deformation measurement point may include the following steps: S731-S733.

[0124] S731. Determine the target blade vibration mode corresponding to the vibration information of the deformation measurement point section.

[0125] The blade vibration mode refers to the vibration mode produced when the blade is excited or subjected to external force.

[0126] In some embodiments of the present application, the vibration data of the blade can be analyzed in advance to determine multiple blade vibration modes corresponding to the blade and the vibration information corresponding to each blade vibration mode. Based on this, after obtaining the vibration information of the deformation measuring point section, the blade vibration mode corresponding to the vibration information can be determined, and the blade vibration mode corresponding to the vibration information can be used as the target blade vibration mode.

[0127] S732. Obtain a target corrective force calculation model that matches the target blade vibration shape from a preset model database, wherein the model database includes a plurality of corrective force calculation models that are pre-established based on key factors of blade deformation and vibration.

[0128] In some embodiments of the present application, multiple corrective force calculation models can be established in advance based on key factors of blade deformation and vibration, where the key factors may include gravity factors, aerodynamic factors, and abnormal factors, etc., where gravity factors may include the mass and center of mass position of the blade, etc., aerodynamic factors may include the operating status of the wind turbine, etc., and abnormal factors may include blade vibration mode, etc. The user can select a suitable algorithm to analyze the above-mentioned key factors according to actual conditions. For example, a deep learning algorithm, a big data analysis algorithm, etc. can be used to obtain multiple corrective force calculation models with blade bending deformation information and vibration information as input and corrective force as output. Different corrective force calculation models correspond to different gravity factors, aerodynamic factors and / or abnormal factors. A model database is constructed based on the obtained multiple corrective force calculation models, and the model database includes multiple corrective force calculation models, as well as the correspondence between each corrective force calculation model and the gravity factor, aerodynamic factor and abnormal factor. Based on this, when obtaining the target corrective force calculation model that matches the target blade vibration type from the preset model database, it can include: obtaining the mass and center of mass position of the blade, and the operating state of the wind turbine to which the blade belongs, obtaining a corrective force calculation model that has a corresponding relationship with the mass and center of mass position of the blade, the operating state of the wind turbine and the target blade vibration type from the model database, and using the corrective force calculation model as the target corrective force calculation model. Among them, the mass and center of mass position of the blade can be obtained from the blade parameters, the operating state of the power generating set can be determined based on the operating data of the wind turbine, and there are related mature technologies for determining the operating state of the wind turbine based on the operating data of the wind turbine. The existing mature technologies can be directly used here, and the operating state of the wind turbine can include but is not limited to initialization state, standby state, startup state, speed-up state, grid-connected state, shutdown, emergency shutdown state, safe operation state, etc.

[0129] S733. Determine the target correction force corresponding to the blade based on the bending deformation information and vibration information of the cross section of the deformation measurement point and the target correction force calculation model.

[0130] After the target correction force calculation model is obtained, the bending deformation information and vibration information of the cross section of the deformation measuring point are input into the target correction force calculation model to obtain the target correction force input by the model.

[0131] In the above manner, the model can be used to quickly obtain accurate target correction force.

[0132] In some possible implementations of the present application, the tension steering mechanisms in all measuring point sections are controlled by the same driving member. In order to achieve a relatively optimal correction effect, when there are multiple deformed measuring point sections and the vibration information includes the vibration frequency and the vibration amplitude, the target correction force corresponding to the blade is determined based on the bending deformation information and the vibration information of the deformed measuring point sections and the target correction force calculation model, which may include the following steps:

[0133] Determine the target measuring point section with the largest vibration amplitude among the deformation measuring point sections;

[0134] Input the bending deformation information and vibration information of the target measuring point section into the target correction force calculation model to determine the correction force corresponding to the target measuring point section;

[0135] The correction force corresponding to the cross section of the target measuring point is determined as the target correction force corresponding to the blade.

[0136] In the above manner, the cross section of the measuring point with the largest vibration amplitude is used as the target measuring point cross section for corrective force calculation, so that the maximum corrective force can be obtained. The blade bending deformation is corrected based on the maximum corrective force, so that the optimal correction effect can be obtained.

[0137] In some embodiments of the present application, the driving member is taken as a driving motor as an example, see Figure 8 , is the control logic diagram of the controller for the drive motor, such as Figure 8 As shown, the control logic of the controller includes:

[0138] A model database is established in advance based on the key factors that cause blade deformation and vibration. The model database includes the correspondence between the correction force calculation model and the key factors. The key factors include gravity factors, aerodynamic factors and abnormal factors. The gravity factors may include the mass and center of mass position of the blade, the aerodynamic factors may include the operating status of the wind turbine generator set, and the abnormal factors may include the blade vibration shape.

[0139] On-site real-time testing of the vibration information and bending deformation information of each measuring point section of the blade;

[0140] If the bending deformation in the bending deformation information of the cross section of each measuring point does not exceed the deformation threshold, no correction is performed;

[0141] If there is a deformation measuring point section whose bending deformation exceeds the deformation threshold, a corresponding target correction force calculation model is determined from a model database based on vibration information and bending deformation information of the deformation measuring point section;

[0142] Calculating the target corrective force of the blade based on the target corrective force calculation model;

[0143] Based on the target correction force, determine the target correction torque of the drive motor.

[0144] Control the drive motor to send out the target correction torque to form a pulling force on the rope on one side;

[0145] After the pulling force is turned by the pulling force steering mechanism, a lateral correction force is formed on the installation position of the pulling force steering mechanism;

[0146] Under the action of the lateral correction force of the cross section at each measuring point, the bending deformation of the blade is corrected.

[0147] Based on the bending deformation correction control method provided in the above embodiment, the present application also provides a specific implementation of the bending deformation correction control device. Please refer to the following embodiment.

[0148] See also Fig. 9 The bending deformation correction control device provided in the embodiment of the present application includes the following modules:

[0149] A first acquisition module 901 is used to acquire bending deformation information of a plurality of measuring point cross sections in a blade, where the bending deformation information includes a bending deformation amount and a bending deformation direction;

[0150] The second acquisition module 902 is used to acquire vibration information of the deformation measuring point section in response to the presence of a deformation measuring point section whose bending deformation is greater than a deformation threshold;

[0151] A correction force determination module 903 is used to determine a target correction force corresponding to the blade according to the bending deformation information and vibration information of the cross section of the deformation measurement point;

[0152] A correction torque determination module 904, configured to determine a target correction torque corresponding to the driving member based on the target correction force;

[0153] The control module 905 is used to control the driving member to output a target correction torque to drive a plurality of tension steering mechanisms installed in the blade to correct the bending deformation of the blade.

[0154] In some possible implementations of the present application, the correction force determination module 903 includes:

[0155] A vibration mode determination unit is used to easily determine the vibration mode of the target blade corresponding to the vibration information of the deformation measurement point section;

[0156] A model determination unit, used to obtain a target corrective force calculation model that matches the target blade vibration shape from a preset model database, wherein the model database includes a plurality of corrective force calculation models that are pre-established based on key factors of blade deformation and vibration;

[0157] The calculation unit is used to determine the target correction force corresponding to the blade based on the bending deformation information and vibration information of the deformation measurement point section and the target correction force calculation model.

[0158] In some possible implementations of the present application, the vibration information includes vibration frequency and vibration amplitude, and the calculation unit is specifically used to:

[0159] Determine the target measuring point section with the largest vibration amplitude among the deformation measuring point sections;

[0160] Input the bending deformation information and vibration information of the target measuring point section into the target correction force calculation model to determine the correction force corresponding to the target measuring point section;

[0161] The correction force corresponding to the cross section of the target measuring point is determined as the target correction force corresponding to the blade.

[0162] The bending deformation correction control device provided in the embodiment of the present application can achieve Figure 7-Figure 8 To avoid repetition, the various processes implemented by the method embodiment are not described here.

[0163] Fig.10 A schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application is shown.

[0164] The electronic device may include a processor 1001 and a memory 1002 storing computer program instructions.

[0165] Specifically, the processor 1001 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0166] The memory 1002 may include a large capacity memory for data or instructions. By way of example and not limitation, the memory 1002 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive or a combination of two or more of these. In appropriate cases, the memory 1002 may include a removable or non-removable (or fixed) medium. In appropriate cases, the memory 1002 may be inside or outside the integrated gateway disaster recovery device. In a specific embodiment, the memory 1002 is a non-volatile solid-state memory. The memory 1002 may include a read-only memory (ROM), a random access memory (RAM), a disk storage medium device, an optical storage medium device, a flash memory device, an electrical, optical, or other physical / tangible memory storage device. Therefore, typically, the memory 1002 includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it can perform the operations described in any one of the bending deformation correction control methods in the above-mentioned embodiments.

[0167] The processor 1001 reads and executes the computer program instructions stored in the memory 1002 to implement any one of the bending deformation correction control methods in the above embodiments.

[0168] In one example, the electronic device may further include a communication interface 1003 and a bus 1010. Fig.10 As shown, the processor 1001, the memory 1002, and the communication interface 1003 are connected via a bus 1010 and communicate with each other.

[0169] The communication interface 1003 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiments of the present application.

[0170] Bus 1010 includes hardware, software or both, and the parts of online data flow billing equipment are coupled to each other. For example, but not limitation, bus may include accelerated graphics port (AGP) or other graphics bus, enhanced industrial standard architecture (EISA) bus, front-end bus (FSB), hypertransport (HT) interconnection, industrial standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In appropriate cases, bus 1010 may include one or more buses. Although the present application embodiment describes and shows a specific bus, the present application considers any suitable bus or interconnection.

[0171] In addition, in combination with the bending deformation correction control method in the above embodiment, the embodiment of the present application can provide a computer storage medium for implementation. The computer storage medium stores computer program instructions; when the computer program instructions are executed by the processor, any one of the bending deformation correction control methods in the above embodiment is implemented.

[0172] It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

[0173] The functional blocks shown in the above-described block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0174] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0175] Aspects of the present disclosure are described above with reference to the flowchart and / or block diagram of the method, device (system) and computer program product according to the embodiment of the present disclosure. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the function / action specified in one or more boxes of the flowchart and / or block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field programmable logic circuit. It can also be understood that each box in the block diagram and / or flowchart and the combination of boxes in the block diagram and / or flowchart can also be implemented by dedicated hardware that performs a specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions.

[0176] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A bending deformation correction system for a blade, wherein the blade comprises a shell and blade attachments arranged in pairs, wherein the shell comprises a blade tip portion and a blade root portion opposite to each other in its own axial direction, and the blade attachment comprises at least one of a web and a main beam, wherein: include: A correction device, comprising a driving member and a plurality of force applying units distributed along the axial direction, each of the force applying units comprising a rope and a tension steering mechanism arranged one-to-one oppositely in a first direction, one of the oppositely arranged tension steering mechanisms being arranged on one of the blade attachments arranged in pairs, the other of the oppositely arranged tension steering mechanisms being arranged on the other of the blade attachments arranged in pairs, the oppositely arranged tension steering mechanisms being located at the same measuring point section of the blade, the measuring point section being a cross section of the blade along the axial direction, the first direction intersecting with the axial direction, one rope end of the rope being connected to one of the oppositely arranged tension steering mechanisms, the other rope end of the rope being connected to the other of the oppositely arranged tension steering mechanisms, and the main rope of the rope being drivingly connected to the driving member; A sensor module is disposed on the blade, and the sensor module is configured to collect bending deformation information of the blade; The controller is configured to control the movement of the driving member according to the bending deformation information, so as to drive the plurality of force applying units to apply a correction force for correcting the bending deformation of the blade to one of the blade attachments arranged in pairs.

2. The bending deformation correction system according to claim 1, characterized in that: The pulling force steering mechanism comprises: An anchoring assembly, arranged on the surface of the blade attachment; A reversing assembly, arranged on the surface of the blade attachment; The rope end connected to the tension steering mechanism is connected to the anchor assembly, and at least part of the main rope of the rope is arranged around the reversing assembly so that the part of the rope away from the anchor assembly converges toward the driving member.

3. The bending deformation correction system according to claim 2, characterized in that: The anchor assembly comprises: An anchor support, arranged on the surface of the blade attachment; An anchor wheel, disposed on the anchor support and rotatably connected to the anchor support; Wherein, a rope end of the rope connected to the tension steering mechanism is provided with a ring, and the ring is sleeved on the anchor wheel.

4. The bending deformation correction system according to claim 2, characterized in that: The switching assembly comprises: A reversing support, arranged on the surface of the blade attachment; A reversing wheel, disposed on the reversing support and rotatably connected to the reversing support; Wherein, at least part of the main ropes of the ropes are arranged around the reversing wheel, so that the parts of the ropes away from the anchoring assembly converge toward the driving member.

5. The bending deformation correction system according to claim 1, characterized in that: The driving member comprises a driving motor having an output shaft, and at least a portion of the main rope in the rope is wound around the output shaft.

6. A blade, characterized in that: include: A casing, wherein the casing includes a blade tip portion and a blade root portion opposite to each other in its axial direction; Blade attachments, which are arranged in pairs and are arranged in the shell, and the blade attachments include at least one of a web and a main beam; A bending deformation correction system as claimed in any one of claims 1 to 5.

7. The blade according to claim 6, characterized in that The blade attachment includes the web, the oppositely arranged tension deflection mechanisms are symmetrically distributed along the chord direction of the blade, and each of the tension deflection mechanisms is arranged on a surface of one of the paired webs facing the other in the chord direction; Alternatively, the blade attachment includes the main beam, the relatively arranged tension deflection mechanisms are symmetrically distributed along the thickness direction of the blade, and each of the tension deflection mechanisms is arranged on a surface of one of the paired main beams facing the other in the thickness.

8. A wind turbine generator set, characterized in that: include: A blade as claimed in claim 6 or 7.

9. A bending deformation correction control method, characterized in that: Applied to the controller according to any one of claims 1 to 5, the method comprises: Acquiring bending deformation information of a cross section of a plurality of measuring points in a blade, wherein the bending deformation information includes a bending deformation amount and a bending deformation direction; In response to the presence of a deformation measuring point cross section whose bending deformation is greater than a deformation threshold, obtaining vibration information of the deformation measuring point cross section; Determine the target correction force corresponding to the blade according to the bending deformation information and vibration information of the cross section of the deformation measuring point; Determining a target corrective torque corresponding to the driving member based on the target corrective force; The driving member is controlled to output the target corrective torque, so as to drive a plurality of force applying units installed in the blade to apply the target corrective force to one of the blade attachments arranged in pairs in the blade.

10. The method according to claim 9, characterized in that The step of determining the target correction force corresponding to the blade according to the bending deformation information and vibration information of the cross section of the deformation measuring point includes: Determine the target blade vibration mode corresponding to the vibration information of the deformation measuring point cross section; Acquire a target corrective force calculation model that matches the target blade vibration shape from a preset model database, wherein the model database includes a plurality of corrective force calculation models that are pre-established based on key factors of blade deformation and vibration; The target correction force corresponding to the blade is determined based on the bending deformation information and vibration information of the cross section of the deformation measuring point and the target correction force calculation model.

11. The method according to claim 10, characterized in that The vibration information includes vibration frequency and vibration amplitude, and the target correction force corresponding to the blade is determined based on the bending deformation information and vibration information of the deformation measurement point section and the target correction force calculation model, including: Determine a target measuring point section having the largest vibration amplitude among the deformation measuring point sections; Inputting the bending deformation information and vibration information of the target measuring point cross section into the target correction force calculation model to determine the correction force corresponding to the target measuring point cross section; The correction force corresponding to the target measuring point cross section is determined as the target correction force corresponding to the blade.

12. A bending deformation correction control device, characterized in that: The controller according to any one of claims 1 to 5, wherein the device comprises: A first acquisition module is used to acquire bending deformation information of a cross section of multiple measuring points in the blade, wherein the bending deformation information includes a bending deformation amount and a bending deformation direction; A second acquisition module is used for acquiring vibration information of the deformation measuring point section in response to the presence of a deformation measuring point section whose bending deformation is greater than a deformation threshold; A correction force determination module, used to determine the target correction force corresponding to the blade according to the bending deformation information and vibration information of the cross section of the deformation measurement point; A correction torque determination module, configured to determine a target correction torque corresponding to the driving member based on the target correction force; The control module is used to control the driving member to output the target correction torque to drive a plurality of tension steering mechanisms installed in the blade to correct the bending deformation of the blade.

13. An electronic device, characterized in that: The device comprises: a processor and a memory storing computer program instructions; When the processor executes the computer program instructions, the bending deformation correction control method as described in any one of claims 9 to 11 is implemented.

14. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer program instructions, and when the computer program instructions are executed by the processor, the bending deformation correction control method according to any one of claims 9 to 11 is implemented.

15. A computer program product, characterized in that When the instructions in the computer program product are executed by a processor of an electronic device, the electronic device executes the bending deformation correction control method as described in any one of claims 9 to 11.

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