Wind power blade lightning conductor fixing device, control system and control method

Abstract

The invention provides a lightning conductor fixing device of a wind power blade, a control system and a control method, and relates to the technical field of wind power generation. The lightning conductor fixing device of the wind power blade comprises a base which is fixed at the blade root part of the wind power blade; the horizontal rotating assembly can rotate in the horizontal direction, so that a first given angle is formed between the lightning conductor and the length direction of the blade; the vertical rotating assembly comprises a guide cylinder, the lightning conductor penetrates through a guide through hole of the guide cylinder, and the guide cylinder is movably connected with the horizontal rotating assembly and can rotate in the vertical direction so that the lightning conductor and the horizontal plane can form a second given angle. The lightning conductor fixing device of the wind power blade, the control system and the control method solve the problem that in the prior art, a lightning conductor installed on the blade is extremely prone to tensile fracture under the action of breathing force in the operation period of the blade.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a wind turbine blade lightning conductor fixing device, a control system for the wind turbine blade lightning conductor fixing device, and a control method for the wind turbine blade lightning conductor fixing device. Background Art

[0002] During the production process of wind turbine blades, the lightning conductor needs to be fixed on the surface of the web, led out at the root of the blade web and connected to the flange at the end face of the blade root.

[0003] As the power of the wind turbine increases, the length of the blades also increases, and the flexibility of the blades increases. During the operation of the blades, they are affected by the breathing force, and the root deformation is large. Although the blade lightning protection line is laid in an "S" shape and fixed to the inner surface of the blade, it is very easy to stretch and break under the action of the breathing force, resulting in the failure of the lightning inducing effect, which brings great safety hazards to the operation of the wind turbine.

[0004] The root end fixing structure and fixing method of the lightning conductor of the wind turbine blade are of great significance to improving the lightning protection performance of wind turbine equipment. Through reasonable design and correct installation process, the fixing effect and service life of the lightning conductor can be effectively improved. At the same time, strengthening daily inspection and maintenance, timely discovering and solving potential problems, will help to ensure the overall safety and stability of wind turbine equipment.

[0005] Therefore, there is an urgent need for a device that can solve at least one of the above problems. Summary of the invention

[0006] The purpose of the embodiments of the present invention is to provide a wind turbine blade lightning conductor fixing device, a control system and a control method, which are used to solve the problem in the prior art that the lightning conductor installed on the blade is very easy to be stretched and broken under the action of breathing force during the operation of the blade.

[0007] In order to achieve the above-mentioned object, the present invention provides a wind turbine blade lightning conductor fixing device, which is used to support the lightning conductor of the wind turbine blade of the wind turbine generator. The wind turbine blade lightning conductor fixing device comprises: A base, used for fixing on the root of a wind turbine blade; A horizontal rotating assembly is movably arranged on the base and can rotate in the horizontal direction so that the lightning conductor forms a first given angle with the length direction of the blade; The vertical rotating assembly includes a guide cylinder having a guide hole that matches the size of the lightning conductor. The lightning conductor passes through the guide hole of the guide cylinder. The guide cylinder is movably connected to the horizontal rotating assembly and can rotate in the vertical direction so that the lightning conductor forms a second given angle with the horizontal plane.

[0008] Specifically, the horizontal rotating assembly includes: a rotating seat; The rotating seat comprises a bottom plate portion rotatably mounted on the base and two vertical plates vertically fixed on the bottom plate portion at a given interval. Both vertical plates are provided with mounting holes, and the mounting holes on the two vertical plates are coaxially arranged.

[0009] Specifically, the vertical rotation assembly further includes: a rotation shaft; The rotating shaft is arranged between the two vertical plates through the mounting through hole, and both ends of the rotating shaft are rotatably mounted in the mounting through hole. The guide cylinder is fixed to the rotating shaft, and the extension direction of the guide through hole is perpendicular to the extension direction of the rotating shaft.

[0010] Specifically, the guide cylinder has a guide cylinder portion and a connecting rod portion; The guide through hole is provided on the guide cylinder portion; The two ends of the connecting rod part are rotatably arranged in the corresponding installation through holes, and the guide tube part is movably connected with the vertical plate through the connecting rod part.

[0011] Specifically, a base mounting hole is provided on the base, and a bearing is installed in the base mounting hole; a rotating boss is provided on the bottom plate of the rotating seat, and the rotating boss of the bottom plate can be rotatably installed in the base mounting hole through the bearing.

[0012] Specifically, the openings at both ends of the guide through hole are arc surfaces after flanging treatment.

[0013] Specifically, the horizontal rotating assembly includes: a second rotating seat; The second rotating seat comprises a second bottom plate portion and a second vertical plate portion vertically arranged on the second bottom plate portion. The second bottom plate portion can be rotatably arranged on the base, and a second mounting hole is opened on the second vertical plate portion.

[0014] Specifically, a short shaft is arranged on the outer surface of the guide cylinder, and the short shaft is rotatably installed in the second installation hole to flexibly connect the guide cylinder to the second vertical plate part.

[0015] Another aspect of the present invention provides a control system for a wind turbine blade lightning conductor fixing device, which is applied to any of the wind turbine blade lightning conductor fixing devices described above, and the control system comprises: The deformation detection module is at least arranged at the root of the wind turbine blade, and is used to detect the deformation of the wind turbine blade and output a corresponding electrical signal according to the deformation; A main control module is connected to the deformation detection module, the horizontal rotation component and the vertical rotation component signals, and is used to process and analyze the electrical signals to obtain the deformation amount of the wind turbine blade, and compare the deformation amount with the preset deformation amount, and output a corresponding horizontal rotation instruction according to the comparison result, and / or output a corresponding vertical rotation instruction to the vertical rotation component according to the processing and analysis result; A drive component is connected to the main control module signal, and is used to drive the horizontal rotation component to rotate according to the horizontal rotation command output by the main control module, so that the lightning conductor is at a first given angle with the length direction of the blade, and / or drive the vertical rotation component to rotate according to the vertical rotation command output by the main control module, so that the lightning conductor is at a second given angle with the horizontal plane.

[0016] Specifically, the main control module includes: a judgment unit and two control units; A judgment unit, used to compare the deformation amount with a preset deformation amount, wherein the preset deformation amount includes a first preset deformation amount and a second preset deformation amount, and the first preset deformation amount is smaller than the second preset deformation amount; When the deformation is less than the first preset deformation, the first control unit outputs a corresponding horizontal rotation instruction to rotate the rotating seat or the second rotating seat of the horizontal rotation component in the horizontal direction, so that the first given angle between the lightning conductor and the length direction of the blade increases; and / or outputs a corresponding vertical rotation instruction to rotate the guide cylinder of the vertical rotation component in the vertical direction, so that the second given angle between the lightning conductor and the horizontal plane increases; When the deformation is between the first preset deformation and the second preset deformation, the current state is maintained, so that the lightning protection line segment at the root of the blade is in an unfixed state and changes with the profile of the blade; When the deformation amount is greater than or equal to the second preset deformation amount, the second control unit outputs a corresponding horizontal rotation instruction to rotate the horizontal rotation in the horizontal direction so as to reduce the first given angle between the lightning conductor and the length direction of the blade; and / or outputs a corresponding vertical rotation instruction to rotate the guide tube of the vertical rotation component in the vertical direction so as to reduce the second given angle between the lightning conductor and the horizontal plane.

[0017] Another aspect of the present invention provides a control method for a lightning conductor fixing device for a wind turbine blade, which is executed based on the control system of the lightning conductor fixing device described in any one of the above items, and the control method comprises: S1) detecting the deformation of the wind turbine blade and outputting a corresponding electrical signal according to the deformation; S2) processing and analyzing the electrical signal to obtain the deformation amount of the wind turbine blade, and comparing the deformation amount with a preset deformation amount, outputting a corresponding horizontal rotation instruction according to the comparison result, so that the lightning conductor forms a first given angle with the length direction of the blade, and / or outputting a corresponding vertical rotation instruction to the vertical rotation component according to the processing and analysis structure, so that the lightning conductor forms a second given angle with the horizontal plane; S3) driving the horizontal rotation component to rotate according to the horizontal rotation instruction output by the main control module and / or outputting the vertical rotation instruction to drive the vertical rotation component to rotate.

[0018] Specifically, in step S2), the deformation amount is compared with the preset deformation amount, and a corresponding horizontal rotation instruction is output to the horizontal rotation component according to the comparison result, so that the lightning conductor is at a first given angle with the length direction of the blade, and / or a corresponding vertical rotation instruction is output to the vertical rotation component according to the processing and analysis result, so that the lightning conductor is at a second given angle with the horizontal plane, including: comparing the deformation amount with a first preset deformation amount and a second preset deformation amount; If the deformation is less than the first preset deformation, a corresponding horizontal rotation instruction is output to rotate the rotating seat or the second rotating seat of the horizontal rotation component in the horizontal direction, so that the first given angle between the lightning conductor and the length direction of the blade increases; and / or a corresponding vertical rotation instruction is output to rotate the guide cylinder of the vertical rotation component in the vertical direction, so that the second given angle between the lightning conductor and the horizontal plane increases; If the deformation amount is between the first preset deformation amount and the second preset deformation amount, the horizontal rotation component maintains the current state and / or the vertical rotation component maintains the current state, so that the lightning protection line segment at the tail of the blade is in an unfixed state and changes with the profile of the blade; If the deformation amount is greater than or equal to the second preset deformation amount, a corresponding horizontal rotation instruction is output to rotate the horizontal rotation in the horizontal direction so that the first given angle between the lightning conductor and the length direction of the blade is reduced; and / or a corresponding vertical rotation instruction is output to rotate the guide tube of the vertical rotation component in the vertical direction so that the second given angle between the lightning conductor and the horizontal plane is reduced.

[0019] The wind turbine blade lightning conductor fixing device provided by the present invention has a base fixed on the blade root of the wind turbine blade, a horizontal rotating assembly is arranged on the base, the horizontal rotating assembly can rotate in the horizontal direction, the guide cylinder of the vertical rotating assembly is movably connected with the horizontal rotating assembly, the guide cylinder can rotate in the vertical direction, and the lightning conductor installed on the wind turbine blade can pass through the guide through hole in the guide cylinder so that part of the lightning conductor segment is accommodated in the guide through hole. In this way, during the operation of the wind turbine blade, the profile of the wind turbine blade changes, thereby pulling the lightning conductor passing through the guide cylinder to move, and the horizontal rotating assembly drives the guide cylinder of the vertical rotating assembly to rotate synchronously when rotating horizontally on the base, and the guide cylinder can also rotate a second given angle in the vertical direction. In this way, the lightning conductor segment located at the tail of the blade root is in an unfixed state and can change with the profile of the wind turbine blade, thereby avoiding the lightning conductor from breaking. The wind turbine blade lightning conductor fixing device, control system and control method provided by the present invention solve the problem that the lightning conductor installed on the blade in the prior art is very easy to be stretched and broken under the action of breathing force during the operation of the blade.

[0020] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings: Figure 1 It is a structural schematic diagram of a lightning arrester fixing device for wind turbine blades provided by an embodiment of the present invention; Figure 2 is a schematic structural diagram of a lightning arrester fixing device for wind turbine blades provided by another embodiment of the present invention; Figure 3 is a schematic structural diagram of a lightning arrester fixing device for wind turbine blades provided by yet another embodiment of the present invention; Figure 4 A schematic diagram of the deformation of the lightning protection line when the deformation of the wind turbine blade provided by the present invention is greater than a second preset deformation; Figure 5 for Figure 4 A top view of Figure 6 A schematic diagram of deformation of a lightning arrester when the deformation of a wind turbine blade provided by the present invention is less than a first preset deformation; Figure 7 for Figure 6 Top view of the .

[0022] Description of Reference Numerals 1-base; 2-horizontal rotation assembly; 3-vertical rotation assembly; 21-rotating seat; 22-second rotating seat; 210-bottom plate; 211-vertical plate; 221-second bottom plate; 222-second vertical plate; 31-guide cylinder; 32-rotating shaft; 310-guide cylinder; 311-connecting rod; 6-short axis; 00-lightning conductor. DETAILED DESCRIPTION

[0023] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0024] Figure 1 The present invention is a schematic structural diagram of a lightning arrester fixing device for a wind turbine blade provided by an embodiment; Figure 2 is a schematic structural diagram of a lightning arrester fixing device for wind turbine blades provided by another embodiment; Figure 3 It is a structural schematic diagram of a wind turbine blade lightning arrester fixing device provided in yet another embodiment.

[0025] like Figure 1-Figure 3 As shown, the present invention provides a wind turbine blade lightning conductor fixing device, which is used to support the lightning conductor of the wind turbine blade of the wind turbine generator. The wind turbine blade lightning conductor fixing device includes: A base 1 is used to be fixed on the root of a wind turbine blade; A horizontal rotating assembly 2 is movably arranged on the base 1 and can rotate in the horizontal direction so that the lightning conductor forms a first given angle with the length direction of the blade; The vertical rotating assembly 3 includes a guide cylinder 31 having a guide hole that matches the size of the lightning conductor. The lightning conductor passes through the guide hole of the guide cylinder 31. The guide cylinder 31 is movably connected to the horizontal rotating assembly 2 and can rotate in the vertical direction so that the lightning conductor is at a second given angle with the horizontal plane.

[0026] The wind turbine blade lightning arrester fixing device provided by the present invention has a base 1 fixed at the root of the wind turbine blade. When the wind turbine blade is in operation, the root of the wind turbine blade is subjected to huge torsion and shear forces, the root is subjected to concentrated forces, and the deformation amplitude is the largest. Thus, arranging the base 1 at the root of the wind turbine blade can make the line segment of the lightning arrester located at the root active, thereby preventing the lightning arrester from being easily broken at the root of the wind turbine blade. The base 1 fits tightly on the blade. The base 1 is made of polyurethane material, so that the manufactured base 1 has better plasticity and can better fit the surface shape of the wind turbine blade. The horizontal rotating component 2 can be arranged on the base 1. The guide cylinder 31 of the vertical rotation assembly 3 connected to the horizontal rotation assembly 2 is connected to the horizontal rotation assembly 2, and the guide cylinder 31 can also rotate in the vertical direction. When the horizontal rotation assembly 2 rotates horizontally on the base 1, the guide cylinder 31 of the vertical rotation assembly 3 is driven to rotate synchronously. At the same time, the guide cylinder 31 can also rotate in the vertical direction. In practical applications, the blade length direction refers to the extension direction from the root to the tip of the wind turbine blade. The first given angle refers to the angle α between the guide cylinder 31 and the blade length axis L formed by the rotation of the horizontal rotation assembly 2 as the first given angle, such as Figure 1 , Figure 7 The second given angle refers to the angle α between the guide cylinder 31 and the blade length axis L; the second given angle refers to the space angle β between the axial direction of the guide cylinder 31 and the upper surface of the base 1 presented by the vertical rotation component 3 being rotated to be the second given angle, that is, Figure 1 , Figure 6The middle guide cylinder 31 and the upper surface of the base 1 form an angle β. The lightning conductor 00 passes through the guide hole of the guide cylinder 31, so that part of the line segment of the lightning conductor 00 is accommodated in the guide hole. When the wind turbine blade is running, the profile of the wind turbine blade changes, pulling the lightning conductor on the wind turbine blade to move. Because part of the line segment of the lightning conductor is accommodated in the guide hole, when the lightning conductor is pulled to move, the horizontal rotation component 2 rotates horizontally on the base 1 and drives the vertical rotation component 3 and the guide cylinder 31 to rotate synchronously. At the same time, the guide cylinder 31 can also rotate in the vertical direction. Through the rotation of the horizontal rotation component 2 and the vertical rotation component 3, the lightning conductor moves along the profile of the wind turbine blade. Synchronous action is performed to prevent the lightning conductor from being torn due to deformation of the wind turbine blade surface when the lightning conductor is fixed on the wind turbine blade surface. The horizontal rotating component 2 and the vertical rotating component 3 rotate synchronously according to the deformation of the wind turbine blade, so that the lightning conductor segment located at the tail of the blade root is in an unfixed state and can change with the change of the wind turbine blade surface to prevent the lightning conductor from breaking. The first given angle is between 0-180°, and the second given angle is between 0-180°, which solves the problem in the prior art that the lightning conductor installed on the blade is easily stretched and broken under the action of breathing force during the operation of the blade.

[0027] In one embodiment, Figure 1 As shown, the horizontal rotating assembly 2 comprises: a rotating seat 21; The rotating seat 21 has a bottom plate 210 rotatably mounted on the base 1 and two vertical plates 211 vertically arranged on the bottom plate 210 at a given interval. Both vertical plates 211 are provided with mounting holes, and the mounting holes on the two vertical plates 211 are coaxially arranged.

[0028] The vertical rotation assembly 3 further includes: a rotation shaft 32; The rotating shaft 32 is arranged between the two vertical plates 211 through the installation through hole. The rotating shaft 32 can be rotatably installed in the installation through hole. The guide cylinder 31 is fixed to the rotating shaft 32, and the extension direction of the guide through hole is perpendicular to the extension direction of the rotating shaft 32.

[0029] The bottom plate 210 of the rotating seat 21 can be rotatably mounted on the base 1, and two vertical plates 211 are vertically arranged on the bottom plate 210. The rotating shaft 32 is located between the two vertical plates 211. The two ends of the rotating shaft 32 can be rotatably arranged in the corresponding mounting holes opened on the two vertical plates 211 of the rotating seat 21. The mounting holes are arranged horizontally. The rotating shaft 32 is fixedly connected to the guide cylinder 31. When the rotating shaft 32 rotates, it drives the guide cylinder 31 to rotate in the vertical direction. The rotating seat 21 rotates, thereby driving the rotating shaft 32 and the guide cylinder 31 to rotate synchronously horizontally. Figure 1 As shown, the guide through hole of the guide cylinder 31 and the rotating shaft 32 are perpendicular to each other, ensuring that the guide cylinder 31 can rotate in the vertical direction, and further drives the lightning conductor passing through the guide cylinder 31 to rotate.

[0030] In order to ensure that the horizontal rotating assembly 2 can rotate smoothly on the base 1, a base mounting hole is provided on the base 1, and a bearing is installed in the base mounting hole; the bottom plate 210 of the rotating seat 21 is provided with a rotating boss, and the rotating boss of the bottom plate 210 is rotatably installed in the base mounting hole through the bearing. The rotating boss on the base 1 is embedded in the inner hole of the bearing, and the bearing is provided to ensure that the base 1 rotates smoothly.

[0031] In another embodiment, Figure 2 As shown, the guide cylinder 31 has a guide cylinder portion 310 and a connecting rod portion 311; The guide through hole is provided on the guide tube portion 310; Both ends of the connecting rod portion 311 are rotatably disposed in corresponding mounting holes, and the guide tube portion 310 is movably connected to the vertical plate 211 through the connecting rod portion 311 .

[0032] The guide tube portion 310 and the connecting rod portion 311 are integrally formed, and the guide tube portion 310 is a hollow cylindrical structure. Figure 2 As shown, each vertical plate 211 is connected to a corresponding connecting rod portion 311, and the connecting rod portion 311 is arranged on the outer surface of the guide cylinder portion 310 along the radial direction of the guide cylinder portion 310. The connecting rod portion 311 is rotatably installed in the mounting through hole on the corresponding vertical plate 211. The rotation of the connecting rod portion 311 drives the guide cylinder portion 310 to rotate in the vertical direction, thereby driving the lightning protection line passing through the guide cylinder portion 310 to rotate. The one-piece guide cylinder 31 has a compact structure.

[0033] In order to prevent the two ends of the guide through hole from wearing the lightning conductor, the two ends of the guide through hole are flanged. After the two ends of the guide through hole are flanged, the two ends of the guide cylinder hole are arc surfaces, which prevents the holes from wearing the lightning conductor.

[0034] In yet another embodiment, Figure 3 As shown, the horizontal rotating assembly includes: a second rotating seat 22; The second rotating seat 22 comprises a second bottom plate portion 221 and a second vertical plate portion 222 vertically disposed on the second bottom plate portion 221 . The second bottom plate portion 221 is rotatably disposed on the base 1 , and a second mounting hole is formed on the second vertical plate portion 222 .

[0035] A short shaft 6 is provided on the outer surface of the guide cylinder 31 . The short shaft 6 is rotatably installed in the second installation hole to flexibly connect the guide cylinder 31 to the second vertical plate portion 222 .

[0036] A counterweight is provided on the second vertical plate portion 222 .

[0037] like Figure 3As shown, the second bottom plate portion 221 of the second rotating seat 22 can be rotatably set on the base 1, and the second vertical plate portion 222 is vertically set on the second bottom plate portion 221. A second mounting hole is horizontally opened on the second vertical plate portion 222. The short shaft 6 is fixedly connected to the outer surface of the guide cylinder 31 along the radial direction of the guide cylinder 31. The short shaft 6 is rotatably installed in the second mounting hole. The rotation of the short shaft 6 can drive the guide cylinder 31 to rotate in the vertical direction. In order to prevent the second rotating seat 22 of the horizontal rotating assembly from being unbalanced due to uneven weight when the wind turbine blades are running, a counterweight block is set on the second vertical plate portion 222 to balance the second rotating seat 22.

[0038] Another aspect of the present invention provides a control system for a lightning conductor fixing device for a wind turbine blade, which is applied to the lightning conductor fixing device described above, and the control system includes: The deformation detection module is at least arranged at the root of the wind turbine blade, and is used to detect the deformation of the wind turbine blade and output a corresponding electrical signal according to the deformation; A main control module, connected to the deformation detection module, the horizontal rotation component 2 and the vertical rotation component 3 by signal, for processing and analyzing the electrical signal to obtain the deformation amount of the wind turbine blade, and comparing the deformation amount with the preset deformation amount, outputting a corresponding horizontal rotation instruction according to the comparison result, and / or outputting a corresponding vertical rotation instruction according to the processing and analysis result; The driving component is connected to the main control module signal, and is used to drive the horizontal rotation component to rotate according to the horizontal rotation instruction output by the main control module, and / or drive the vertical rotation component to rotate according to the vertical rotation instruction output by the main control module.

[0039] The main control module includes: a judgment unit and two control units; A judgment unit, used to compare the deformation amount with a preset deformation amount, wherein the preset deformation amount includes a first preset deformation amount and a second preset deformation amount, and the first preset deformation amount is smaller than the second preset deformation amount; When the deformation amount is less than or equal to the first preset deformation amount, the first control unit outputs a corresponding horizontal rotation instruction to rotate the rotating seat or the second rotating seat of the horizontal rotation component in the horizontal direction, so that the first given angle between the lightning conductor and the length direction of the blade increases; and / or outputs a corresponding vertical rotation instruction to rotate the guide cylinder of the vertical rotation component in the vertical direction, so that the second given angle between the lightning conductor and the horizontal plane increases; When the deformation is between the first preset deformation and the second preset deformation, the current state is maintained, so that the lightning protection line segment at the root of the blade is in an unfixed state and changes with the profile of the blade; When the deformation amount is greater than or equal to the second preset deformation amount, the second control unit outputs a corresponding horizontal rotation instruction to rotate the horizontal rotation in the horizontal direction so as to reduce the first given angle between the lightning conductor and the length direction of the blade; and / or outputs a corresponding vertical rotation instruction to rotate the guide tube of the vertical rotation component in the vertical direction so as to reduce the second given angle between the lightning conductor and the horizontal plane.

[0040] In order to control the lightning protection line to move synchronously with the deformation of the wind turbine blade of the wind turbine generator, the rotation angles of the horizontal rotation component 2 and the vertical rotation component 3 are controlled according to the deformation of the wind turbine blade. A deformation detection module is set at the root of the wind turbine blade to detect the deformation of the wind turbine blade, and a corresponding electrical signal is output to the main control module according to the deformation. The main control module obtains the deformation of the wind turbine blade after analyzing and processing the electrical signal. After the deformation is compared with the preset deformation, the preset deformation includes a first preset deformation and a second preset deformation. The judgment unit compares the deformation with the first preset deformation and the second preset deformation. The control unit issues a corresponding horizontal rotation instruction and a vertical rotation instruction according to the judgment result. The control unit includes a first control unit and a second control unit. If the judgment unit judges that the deformation is less than or equal to the first preset deformation, the first control unit issues a corresponding horizontal rotation instruction to the driving component, and the driving component drives the rotating seat 21 or the second rotating seat 22 of the horizontal rotation component 2 to rotate. The driving component drives the rotating seat 21 or the second rotating seat 22 to rotate to increase the first given angle, and the driving component drives the guide cylinder 31 of the vertical rotation component 3 to rotate to increase the second given angle. If the deformation is between the first preset deformation and the second preset deformation, the current state is maintained, the driving component does not drive the horizontal rotation component and the vertical rotation component, the rotation of the horizontal rotation component and the vertical rotation component is not driven by the driving component, and is in an unfixed state, and the horizontal rotation component and the vertical rotation component can rotate freely with the change of the profile of the wind turbine blade. When the deformation is greater than or equal to the second preset deformation, the second control unit sends a corresponding horizontal rotation instruction to the driving component, and the driving component drives the rotating seat 21 or the second rotating seat 22 of the horizontal rotation component 2 to rotate, and the driving component drives the rotating seat 21 or the second rotating seat 22 to rotate to reduce the first given angle, and at the same time, the driving component drives the guide cylinder 31 of the vertical rotation component 3 to rotate to reduce the second given angle.

[0041] Another aspect of the present invention provides a control method for a wind turbine blade lightning conductor fixing device, which is executed based on the control system of the wind turbine blade lightning conductor fixing device described in any one of the above items, and the control method comprises: S1) detecting the deformation of the wind turbine blade and outputting a corresponding electrical signal according to the deformation; S2) processing and analyzing the electrical signal to obtain a deformation amount of the wind turbine blade, and comparing the deformation amount with a preset deformation amount, and outputting a corresponding horizontal rotation instruction to the horizontal rotation component according to the comparison result so that the horizontal rotation component rotates in the horizontal direction by a first given angle, and / or outputting a corresponding vertical rotation instruction to the vertical rotation component according to the processing and analysis result so that the vertical rotation component rotates in the vertical direction by a second given angle; S3) driving the horizontal rotation component to rotate according to the horizontal rotation instruction output by the main control module and / or outputting the vertical rotation instruction to drive the vertical rotation component to rotate.

[0042] In step S2), the deformation amount is compared with the preset deformation amount, and a corresponding horizontal rotation instruction is output to the horizontal rotation component according to the comparison result, so that the lightning conductor is at a first given angle with the length direction of the blade, and / or a corresponding vertical rotation instruction is output to the vertical rotation component according to the processing and analysis result, so that the lightning conductor is at a second given angle with the horizontal plane, including: comparing the deformation amount with a first preset deformation amount and a second preset deformation amount; If the deformation is less than or equal to the first preset deformation, a corresponding horizontal rotation instruction is output to rotate the rotating seat or the second rotating seat of the horizontal rotation component in the horizontal direction, so that the first given angle between the lightning conductor and the length direction of the blade increases; and / or a corresponding vertical rotation instruction is output to rotate the guide cylinder of the vertical rotation component in the vertical direction, so that the second given angle between the lightning conductor and the horizontal plane increases; If the deformation amount is between the first preset deformation amount and the second preset deformation amount, the horizontal rotation component maintains the current state and / or the vertical rotation component maintains the current state, so that the lightning protection line segment at the tail of the blade is in an unfixed state and changes with the profile of the blade; If the deformation amount is greater than or equal to the second preset deformation amount, a corresponding horizontal rotation instruction is output to rotate the horizontal rotation in the horizontal direction so that the first given angle between the lightning conductor and the length direction of the blade is reduced; and / or a corresponding vertical rotation instruction is output to rotate the guide tube of the vertical rotation component in the vertical direction so that the second given angle between the lightning conductor and the horizontal plane is reduced.

[0043] Detecting the deformation of the wind turbine blade includes: detecting the deformation of the root of the wind turbine blade.

[0044] Since the deformation of the root of the wind turbine blade is the largest, the line segment of the lightning protection wire fixed at the root of the wind turbine blade is most likely to break due to the deformation of the root. Therefore, in the specific scheme of step S1), the deformation of the wind turbine blade can be directly detected by detecting the deformation of the root of the blade.

[0045] The deformation detection module of the deformation amount of the wind turbine blade may include a piezoelectric patch and a signal transmission module. Multiple piezoelectric patches may be embedded in the root of the wind turbine blade. When the wind turbine blade of the wind turbine rotates, the wind turbine blade bends and deforms. At this time, the piezoelectric patch generates a voltage signal. The collected voltage signal is transmitted to the main control module through the signal transmission module. After processing and analysis by the main control module, the processing and analysis results are stored, and the analysis results are visualized to intuitively reflect the deformation of the blade root.

[0046] In another specific solution, the root deformation of the fan blade can be obtained by detecting the vibration of the fan blade. The wind speed can also be detected to calculate the vibration of the fan blade and then calculate the root deformation of the fan blade.

[0047] The deformation amount is compared with the preset deformation amount, and the corresponding horizontal rotation instruction and the corresponding vertical rotation instruction are output according to the comparison result. The specific scheme can be: The preset deformation includes a first preset deformation and a second preset deformation, wherein the first preset deformation is smaller than the second preset deformation; the first given angle refers to the angle α between the guide cylinder 31 and the longitudinal axis L of the blade formed by the rotation of the horizontal rotation component 2 being the first given angle, such as Figure 1 , Figure 7 The second given angle refers to the angle α between the axial direction of the guide cylinder 31 and the longitudinal axis L of the blade; the second given angle refers to the spatial angle β between the axial direction of the guide cylinder 31 and the upper surface of the base 1 presented by the vertical rotation component 3 being rotated to be the second given angle, that is, Figure 1 , Figure 6 The middle guide tube 31 and the upper surface of the base 1 form an angle β.

[0048] Comparing the detected deformation amount with the first preset deformation amount and the second preset deformation amount; If the deformation amount is less than or equal to the first preset deformation amount, it indicates that the deformation amount of the current blade is small, and the length of the lightning conductor that needs to match the blade is short, such as Figure 7 As shown, at this time, the rotating seat 21 of the horizontal rotating assembly 2 can be controlled to rotate so that the spatial angle between the axial extension direction of the rotating shaft 32 of the vertical rotating assembly 3 and the axis L in the length direction of the blade is gradually reduced to 0°, that is, the angle α between the axial direction of the guide cylinder 31 and the axis L in the length direction of the blade is 90°, that is, the first given angle is 90°; at the same time, as Figure 6As shown, the vertical rotating assembly 3 can also be controlled to rotate so that the angle β between the guide cylinder 31 and the upper surface of the base 1 gradually increases to 90°, that is, the second given angle is 90°. In this way, the lightning conductor can extend along an "S-shaped" curve in both directions of the profile of the wind turbine blade and / or the profile of the vertical wind turbine blade, and the lightning conductor is tightened by rotating the horizontal rotating assembly 2 and the vertical rotating assembly 3, thereby avoiding the phenomenon of entanglement, knotting, etc. caused by the excessive hanging length of the lightning conductor.

[0049] If the deformation is greater than or equal to the first preset deformation and less than or equal to the second preset deformation, it indicates that the deformation of the current blade is in a moderate range and the length of the lightning conductor that needs to match the blade is also moderate. At this time, the horizontal rotation component and the vertical rotation component may not be controlled, so that the lightning conductor segment located at the tail of the blade root is in an unfixed state, but changes with the shape of the wind turbine blade. The horizontal rotation component and the vertical rotation component swing freely with the rotation of the blade, which solves the problem that the lightning conductor is easily stretched and broken under the action of breathing force during blade operation.

[0050] If the deformation is greater than the second preset deformation, it indicates that the deformation of the current blade is in a large range. The lightning conductor is tightened due to the large deformation of the wind turbine blade. At this time, the lightning conductor needs to be loosened to avoid the lightning conductor being torn off. Figure 5 As shown, at this time, the rotating seat 21 of the horizontal rotating assembly 2 can be controlled to rotate so that the angle between the rotating shaft 32 of the vertical rotating assembly 3 and the blade length direction gradually increases to 90°, thereby ensuring that the angle α between the axial extension direction of the guide cylinder 31 of the lightning conductor and the axis L in the blade length direction is 0°, that is, the first given angle is 0°; at the same time, as Figure 4 As shown, the vertical rotating assembly 3 can also be controlled to rotate so that the angle β between the guide cylinder 31 and the upper surface of the base 1 gradually decreases to 0°, that is, the second given angle is 0°. In this way, the lightning conductor extends along the length direction of the blade as a whole, thereby avoiding the problem that the length of the lightning conductor cannot match the large deformation of the wind turbine blade and is stretched and broken.

[0051] By setting three preset deformation ranges, the bending setting of the lightning conductor matches the wind turbine blades under different wind conditions and different deformation amounts, which can not only avoid the lightning conductor from being entangled or knotted due to the long suspended length when the blade deformation is small, but also avoid the lightning conductor from being stretched and broken when the blade deformation is large. In addition, in more cases, by reasonably calculating and setting the size of the lightning conductor fixture and the length of the lightning conductor, when the blade deformation is within the normal range, there is no need for control, and only the fixture can swing freely with the rotation of the blade to avoid the lightning conductor length being stretched and broken, entangled and knotted under the action of blade breathing. In addition, this method only needs to be controlled when the deformation of the root of the blade is large or small, and the overall control cost is low.

[0052] It should be noted that the above control method is not limited to matching three control modes according to three deformation ranges, but can also match two control modes according to two deformation ranges.

[0053] A preset deformation amount can be set in advance; if the deformation amount is less than the preset deformation amount, the first given angle α and the second given angle β are controlled to increase; if the deformation amount is greater than or equal to the preset deformation amount, the first given angle α and the second given angle β are controlled to decrease, which can also achieve a similar effect.

[0054] The driving assembly includes a first horizontal driver, a vertical driver, a second horizontal driver and a second vertical driver. The first horizontal driver, the vertical driver, the second horizontal driver and the second vertical driver are all connected to the main control module signal. The first horizontal driver is arranged on the base 1, and the first horizontal driver drives the rotating seat 21 to rotate on the base 1 according to the horizontal rotation instruction; the vertical driver is arranged on any vertical plate 211, and the vertical driver drives the rotating shaft 32 to rotate according to the vertical rotation instruction, thereby driving the guide cylinder 31 fixed to the rotating shaft 32 to rotate; the second horizontal driver is arranged on the base 1, and the second horizontal driver drives the second rotating seat 22 to rotate according to the horizontal rotation instruction; the second vertical driver is arranged on the second vertical plate portion 222 and can drive the short shaft 6 to rotate, thereby driving the guide cylinder 31 to rotate.

[0055] The wind turbine blade lightning conductor fixing device provided by the present invention has a base fixed on the blade root of the wind turbine blade, a horizontal rotating assembly is arranged on the base, the horizontal rotating assembly can rotate in the horizontal direction, the guide cylinder of the vertical rotating assembly is movably connected with the horizontal rotating assembly, the guide cylinder can rotate in the vertical direction, and the lightning conductor installed on the wind turbine blade can pass through the guide through hole in the guide cylinder so that part of the lightning conductor segment is accommodated in the guide through hole. In this way, during the operation of the wind turbine blade, the profile of the wind turbine blade changes, thereby pulling the lightning conductor passing through the guide cylinder to move, and the horizontal rotating assembly drives the guide cylinder of the vertical rotating assembly to rotate synchronously when rotating horizontally on the base, and the guide cylinder can also rotate a second given angle in the vertical direction. In this way, the lightning conductor segment located at the tail of the blade root is in an unfixed state and can change with the profile of the wind turbine blade, thereby avoiding the lightning conductor from breaking. The wind turbine blade lightning conductor fixing device, control system and control method provided by the present invention solve the problem that the lightning conductor installed on the blade in the prior art is very easy to be stretched and broken under the action of breathing force during the operation of the blade.

[0056] The optional implementation modes of the embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above implementation modes. Within the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical scheme of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.

[0057] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

[0058] In addition, various implementation modes of the embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the embodiments of the present invention, they should also be regarded as the contents disclosed by the embodiments of the present invention.

Claims

1. A lightning conductor fixing device for a wind turbine blade, used to support the lightning conductor of a wind turbine blade of a wind turbine generator, characterized in that: The wind turbine blade lightning arrester fixing device comprises: A base (1) is used to be fixed on the root of a wind turbine blade; A horizontal rotating assembly (2) is movably arranged on the base (1) and is capable of rotating in a horizontal direction so that the lightning conductor forms a first given angle with the length direction of the blade; The vertical rotation assembly (3) comprises a guide cylinder (31) having a guide through hole that matches the size of the lightning conductor. The lightning conductor passes through the guide through hole of the guide cylinder (31). The guide cylinder (31) is movably connected to the horizontal rotation assembly (2) and can rotate in the vertical direction so that the lightning conductor forms a second given angle with the horizontal plane.

2. The wind turbine blade lightning arrester fixing device according to claim 1, characterized in that: The horizontal rotating assembly (2) comprises: a rotating seat (21); The rotating seat (21) comprises a bottom plate portion (210) rotatably mounted on the base (1) and two vertical plates (211) vertically fixed on the bottom plate portion (210) at a given interval, and both vertical plates (211) are provided with mounting holes, and the mounting holes on the two vertical plates (211) are coaxially arranged.

3. The wind turbine blade lightning arrester fixing device according to claim 2, characterized in that: The vertical rotating assembly (3) further comprises: a rotating shaft (32); The rotating shaft (32) is arranged between the two vertical plates (211) through a mounting through hole. The rotating shaft (32) is rotatably mounted in the mounting through hole. The guide cylinder (31) is fixed to the rotating shaft (32), and the extension direction of the guide through hole is perpendicular to the extension direction of the rotating shaft (32).

4. The wind turbine blade lightning arrester fixing device according to claim 2, characterized in that: The guide cylinder (31) comprises a guide cylinder portion (310) and a connecting rod portion (311); The guide through hole is formed on the guide tube portion (310); Both ends of the connecting rod portion (311) are rotatably arranged in corresponding mounting holes, and the guide tube portion (310) is movably connected to the vertical plate (211) via the connecting rod portion (311).

5. The wind turbine blade lightning arrester fixing device according to claim 1, characterized in that: The horizontal rotating assembly comprises: a second rotating seat (22); The second rotating seat (22) comprises a second bottom plate portion (221) and a second vertical plate portion (222) vertically arranged on the second bottom plate portion (221); the second bottom plate portion (221) is rotatably arranged on the base (1); and a second mounting hole is provided on the second vertical plate portion (222).

6. The wind turbine blade lightning arrester fixing device according to claim 5, characterized in that: A short shaft (6) is provided on the outer surface of the guide cylinder (31), and the short shaft (6) is rotatably mounted in the second mounting hole to flexibly connect the guide cylinder (31) to the second vertical plate portion (222).

7. A control system for a wind turbine blade lightning conductor fixing device, applied to the wind turbine blade lightning conductor fixing device according to any one of claims 1 to 6, characterized in that: The control system includes: The deformation detection module is at least arranged at the root of the wind turbine blade, and is used to detect the deformation of the wind turbine blade and output a corresponding electrical signal according to the deformation; A main control module, connected to the deformation detection module, the horizontal rotation component and the vertical rotation component signal, for processing and analyzing the electrical signal to obtain the deformation amount of the wind turbine blade, and comparing the deformation amount with the preset deformation amount, outputting a corresponding horizontal rotation instruction according to the comparison result, and / or outputting a corresponding vertical rotation instruction according to the processing and analysis result; A drive component is connected to the main control module signal, and is used to drive the horizontal rotation component to rotate according to the horizontal rotation command output by the main control module, so that the lightning conductor is at a first given angle with the length direction of the blade, and / or drive the vertical rotation component to rotate according to the vertical rotation command output by the main control module, so that the lightning conductor is at a second given angle with the horizontal plane.

8. The control system of the wind turbine blade lightning arrester fixing device according to claim 7, characterized in that: The main control module includes: a judgment unit and two control units; A judgment unit, used to compare the deformation amount with a preset deformation amount, wherein the preset deformation amount includes a first preset deformation amount and a second preset deformation amount, and the first preset deformation amount is smaller than the second preset deformation amount; When the deformation amount is less than or equal to the first preset deformation amount, the first control unit outputs a corresponding horizontal rotation instruction to rotate the rotating seat or the second rotating seat of the horizontal rotation component in the horizontal direction, so that the first given angle between the lightning conductor and the length direction of the blade increases; and / or outputs a corresponding vertical rotation instruction to rotate the guide cylinder of the vertical rotation component in the vertical direction, so that the second given angle between the lightning conductor and the horizontal plane increases; When the deformation is between the first preset deformation and the second preset deformation, the current state is maintained, so that the lightning protection line segment at the root of the blade is in an unfixed state and changes with the profile of the blade; When the deformation amount is greater than or equal to the second preset deformation amount, the second control unit outputs a corresponding horizontal rotation instruction to rotate the rotating seat or the second rotating seat of the horizontal rotation component in the horizontal direction, so that the first given angle between the lightning conductor and the length direction of the blade is reduced; and / or outputs a corresponding vertical rotation instruction to rotate the guide tube of the vertical rotation component in the vertical direction, so that the second given angle between the lightning conductor and the horizontal plane is reduced.

9. A control method for a lightning conductor fixing device for a wind turbine blade, executed based on the control system of the lightning conductor fixing device according to any one of claims 7 to 8, characterized in that: The control method comprises: S1) detecting the deformation of the wind turbine blade and outputting a corresponding electrical signal according to the deformation; S2) processing and analyzing the electrical signal to obtain the deformation amount of the wind turbine blade, and comparing the deformation amount with a preset deformation amount, and outputting a corresponding horizontal rotation instruction to the horizontal rotation component according to the comparison result, so that the lightning conductor forms a first given angle with the length direction of the blade, and / or outputting a corresponding vertical rotation instruction to the vertical rotation component according to the processing and analysis result, so that the lightning conductor forms a second given angle with the horizontal plane; S3) driving the horizontal rotation component to rotate according to the horizontal rotation instruction output by the main control module and / or outputting the vertical rotation instruction to drive the vertical rotation component to rotate.

10. The control method of the wind turbine blade lightning arrester fixing device according to claim 9, characterized in that: In step S2), the deformation amount is compared with the preset deformation amount, and a corresponding horizontal rotation instruction is output to the horizontal rotation component according to the comparison result, so that the lightning conductor is at a first given angle with the length direction of the blade, and / or a corresponding vertical rotation instruction is output to the vertical rotation component according to the processing and analysis result, so that the lightning conductor is at a second given angle with the horizontal plane, including: comparing the deformation amount with a first preset deformation amount and a second preset deformation amount; If the deformation is less than the first equal to the preset deformation, a corresponding horizontal rotation instruction is output to rotate the rotating seat or the second rotating seat of the horizontal rotation component in the horizontal direction, so that the first given angle between the lightning conductor and the length direction of the blade increases; and / or a corresponding vertical rotation instruction is output to rotate the guide cylinder of the vertical rotation component in the vertical direction, so that the second given angle between the lightning conductor and the horizontal plane increases; If the deformation amount is between the first preset deformation amount and the second preset deformation amount, the horizontal rotation component maintains the current state and / or the vertical rotation component maintains the current state, so that the lightning protection line segment at the tail of the blade is in an unfixed state and changes with the profile of the blade; If the deformation amount is greater than or equal to the second preset deformation amount, a corresponding horizontal rotation instruction is output to rotate the horizontal rotation in the horizontal direction so that the first given angle between the lightning conductor and the length direction of the blade is reduced; and / or a corresponding vertical rotation instruction is output to rotate the guide tube of the vertical rotation component in the vertical direction so that the second given angle between the lightning conductor and the horizontal plane is reduced.

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