Wind turbine blade lightning protection wire fixing device, control system and control method

Abstract

This invention provides a lightning protection wire fixing device, control system, and control method for wind turbine blades, relating to the field of wind power generation technology. The lightning protection wire fixing device for wind turbine blades includes: a base fixed to the root of the wind turbine blade; a horizontal rotation component capable of rotating horizontally to make the lightning protection wire form a first given angle with the blade's length direction; and a vertical rotation component including a guide cylinder through which the lightning protection wire passes, the guide cylinder being movably connected to the horizontal rotation component and capable of rotating vertically to make the lightning protection wire form a second given angle with the horizontal plane. This lightning protection wire fixing device, control system, and control method for wind turbine blades solves the problem in the prior art where lightning protection wires installed on blades are easily stretched and broken under the action of breathing force during blade operation.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, specifically to a wind turbine blade lightning protection wire fixing device, a control system for the wind turbine blade lightning protection wire fixing device, and a control method for the wind turbine blade lightning protection wire fixing device. Background Technology

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

[0003] As wind turbine power increases, blade length also increases, and blade flexibility increases. During operation, the blades are subjected to breathing force, resulting in significant deformation at the root. Although the lightning protection wire 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 breathing force, causing the lightning attraction effect to fail and posing a great safety hazard to wind turbine operation.

[0004] The root-end fixing structure and method of lightning protection conductors for wind turbine blades are of great significance for improving the lightning protection performance of wind power equipment. Through reasonable design and correct installation procedures, the fixing effect and service life of the lightning protection conductors can be effectively improved. At the same time, strengthening daily inspection and maintenance, and promptly identifying and resolving potential problems, helps to ensure the overall safety and stability of wind power 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 this invention is to provide a lightning protection wire fixing device, control system, and control method for wind turbine blades, which solves the problem that lightning protection wires installed on blades are easily stretched and broken under the action of breathing force during blade operation in the prior art.

[0007] To achieve the above objectives, the present invention provides a lightning protection wire fixing device for wind turbine blades, used to support the lightning protection wire of wind turbine blades, the wind turbine blade lightning protection wire fixing device comprising:

[0008] The base is used to fix the wind turbine blade to the root.

[0009] A horizontally rotating component, movably mounted on a base, is capable of rotating in the horizontal direction to make the lightning protection wire form a first given angle with the blade length direction;

[0010] A vertical rotating assembly includes a guide cylinder having a guide through hole that matches the size of the lightning protection wire, through which the lightning protection wire passes. The guide cylinder is movably connected to a horizontal rotating assembly and is capable of rotating in the vertical direction to make the lightning protection wire form a second given angle with the horizontal plane.

[0011] Specifically, the horizontal rotation assembly includes: a rotating base;

[0012] The rotating base has a base plate that is rotatably mounted on the base and two vertical plates that are vertically fixed on the base plate at a given interval. Each of the two vertical plates has a mounting hole, and the mounting holes on the two vertical plates are coaxially arranged.

[0013] Specifically, the vertical rotation assembly further includes: a rotation shaft;

[0014] The rotating shaft is installed between two vertical plates through a mounting hole. Both ends of the rotating shaft are rotatably installed in the mounting 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.

[0015] Specifically, the guide cylinder has a guide cylinder portion and a connecting rod portion;

[0016] The guide hole is formed on the guide cylinder section;

[0017] Both ends of the connecting rod are rotatably installed in the corresponding mounting holes, and the guide cylinder is movably connected to the vertical plate through the connecting rod.

[0018] Specifically, the base has a base mounting hole, and a bearing is installed in the base mounting hole; the bottom plate of the rotating seat is provided with a rotating boss, and the rotating boss of the bottom plate is rotatably installed in the base mounting hole through the bearing.

[0019] Specifically, the two ends of the guide hole are curved surfaces after being flanged.

[0020] Specifically, the horizontal rotation assembly includes: a second rotating seat;

[0021] The second rotating seat has a second base plate and a second vertical plate that is vertically arranged on the second base plate. The second base plate is rotatably arranged on the base, and a second mounting hole is provided on the second vertical plate.

[0022] Specifically, a short shaft is provided on the outer surface of the guide cylinder, and the short shaft is rotatably installed in the second mounting hole to movably connect the guide cylinder to the second vertical plate.

[0023] Another aspect of the present invention provides a control system for a wind turbine blade lightning protection wire fixing device, applied to the wind turbine blade lightning protection wire fixing device described in any of the above claims, the control system comprising:

[0024] The deformation detection module is installed at least at the root of the wind turbine blade to detect the amount of deformation of the wind turbine blade and output the corresponding electrical signal according to the amount of deformation.

[0025] The main control module is connected to the deformation detection module, the horizontal rotation component, and the vertical rotation component. It is used to process and analyze the electrical signals to obtain the deformation of the wind turbine blade, compare the deformation with the preset deformation, output the corresponding horizontal rotation command based on the comparison result, and / or output the corresponding vertical rotation command to the vertical rotation component based on the processing and analysis result.

[0026] The drive component is connected to the main control module via a 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 protection wire is at a first given angle with the blade length direction, 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 protection wire is at a second given angle with the horizontal plane.

[0027] Specifically, the main control module includes: a judgment unit and two control units;

[0028] The judgment unit is used to compare the deformation amount with the 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 less than the second preset deformation amount.

[0029] When the deformation is less than the first preset deformation, the first control unit outputs a corresponding horizontal rotation command to make the rotating seat of the horizontal rotation component or the second rotating seat rotate in the horizontal direction, so as to increase the first given angle between the lightning protection wire and the blade length direction; and / or outputs a corresponding vertical rotation command to make the guide cylinder of the vertical rotation component rotate in the vertical direction, so as to increase the second given angle between the lightning protection wire and the horizontal plane.

[0030] 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 shape of the blade.

[0031] When the deformation is greater than or equal to the second preset deformation, the second control unit outputs a corresponding horizontal rotation command to rotate the horizontal rotation in the horizontal direction, so as to reduce the first given angle between the lightning protection wire and the blade length direction; and / or outputs a corresponding vertical rotation command to rotate the guide cylinder of the vertical rotation assembly in the vertical direction, so as to reduce the second given angle between the lightning protection wire and the horizontal plane.

[0032] The present invention further provides a control method for a lightning protection wire fixing device for wind turbine blades, which is executed based on the control system of the lightning protection wire fixing device described in any of the above claims, the control method comprising:

[0033] S1) Detect the deformation of the wind turbine blades and output the corresponding electrical signal based on the deformation.

[0034] S2) Process and analyze the electrical signal to obtain the deformation of the wind turbine blade, compare the deformation with the preset deformation, output the corresponding horizontal rotation command according to the comparison result, so that the lightning protection wire is at a first given angle with the blade length direction, and / or output the corresponding vertical rotation command to the vertical rotation component according to the processing and analysis structure, so that the lightning protection wire is at a second given angle with the horizontal plane.

[0035] S3) Drive the horizontal rotation component to rotate according to the horizontal rotation command output by the main control module and / or drive the vertical rotation component to rotate according to the vertical rotation command output by the main control module.

[0036] Specifically, in step S2), the deformation amount is compared with the preset deformation amount, and a corresponding horizontal rotation command is output to the horizontal rotation component based on the comparison result, so that the lightning protection wire and the blade length direction form a first given angle, and / or a corresponding vertical rotation command is output to the vertical rotation component based on the processing and analysis result, so that the lightning protection wire and the horizontal plane form a second given angle, including:

[0037] The deformation amount is compared with the first preset deformation amount and the second preset deformation amount;

[0038] If the deformation is less than the first preset deformation, the corresponding horizontal rotation command is output to make the rotating seat of the horizontal rotation component or the second rotating seat rotate in the horizontal direction, so as to increase the first given angle between the lightning protection wire and the blade length direction; and / or the corresponding vertical rotation command is output to make the guide cylinder of the vertical rotation component rotate in the vertical direction, so as to increase the second given angle between the lightning protection wire and the horizontal plane.

[0039] 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 shape of the blade.

[0040] If the deformation is greater than or equal to the second preset deformation, the corresponding horizontal rotation command is output to rotate the horizontal rotation in the horizontal direction, so as to reduce the first given angle between the lightning protection wire and the blade length direction; and / or the corresponding vertical rotation command is output to rotate the guide cylinder of the vertical rotation component in the vertical direction, so as to reduce the second given angle between the lightning protection wire and the horizontal plane.

[0041] The present invention provides a wind turbine blade lightning protection wire fixing device. A base is fixed to the root of the wind turbine blade. A horizontal rotating assembly is mounted on the base, capable of rotating horizontally. A guide cylinder of a vertical rotating assembly is movably connected to the horizontal rotating assembly, allowing the guide cylinder to rotate vertically. The lightning protection wire installed on the wind turbine blade passes through a guide hole in the guide cylinder, allowing a portion of the lightning protection wire segment to be accommodated within the guide hole. During wind turbine blade operation, changes in the blade profile pull the lightning protection wire passing through the guide cylinder. As the horizontal rotating assembly rotates horizontally on the base, it drives the guide cylinder of the vertical rotating assembly to rotate synchronously. Simultaneously, the guide cylinder can also rotate vertically by a second given angle. Thus, the lightning protection wire segment located at the blade root tail is in a non-fixed state, changing with the blade profile and preventing breakage. The wind turbine blade lightning protection wire fixing device, control system, and control method provided by the present invention solve the problem in the prior art where lightning protection wires installed on blades are easily stretched and broken under the action of breathing force during blade operation.

[0042] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0043] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0044] Figure 1 This is a schematic diagram of the structure of a wind turbine blade lightning protection wire fixing device provided in one embodiment of the present invention;

[0045] Figure 2 This is a schematic diagram of the structure of a wind turbine blade lightning protection wire fixing device provided in another embodiment of the present invention;

[0046] Figure 3 This is a schematic diagram of the structure of a wind turbine blade lightning protection wire fixing device provided in another embodiment of the present invention;

[0047] Figure 4 This is a schematic diagram of the deformation of the lightning protection wire when the deformation of the wind turbine blade is greater than the second preset deformation amount, as provided by the present invention.

[0048] Figure 5 for Figure 4 Top view;

[0049] Figure 6 This is a schematic diagram of the deformation of the lightning protection wire when the deformation of the wind turbine blade provided by the present invention is less than the first preset deformation amount;

[0050] Figure 7 for Figure 6Top view.

[0051] Explanation of reference numerals in the attached figures

[0052] 1-Base; 2-Horizontal rotating assembly; 3-Vertical rotating assembly; 21-Rotating seat; 22-Second rotating seat; 210-Base plate; 211-Vertical plate; 221-Second base plate; 222-Second vertical plate; 31-Guide cylinder; 32-Rotating shaft; 310-Guide cylinder; 311-Connecting rod; 6-Short shaft; 00-Lightning protection wire. Detailed Implementation

[0053] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0054] Figure 1 This is a schematic diagram of the structure of a wind turbine blade lightning protection wire fixing device provided in one embodiment; Figure 2 This is a schematic diagram of the structure of a wind turbine blade lightning protection wire fixing device provided in another embodiment; Figure 3 This is a schematic diagram of the structure of a wind turbine blade lightning protection wire fixing device provided in another embodiment.

[0055] like Figures 1-3 As shown, the present invention provides a lightning protection wire fixing device for wind turbine blades, used to support the lightning protection wire of wind turbine blades. The wind turbine blade lightning protection wire fixing device includes:

[0056] Base 1 is used to fix it to the root of the wind turbine blade;

[0057] The horizontal rotating component 2 is movably mounted on the base 1 and can rotate horizontally so that the lightning protection wire forms a first given angle with the length direction of the blade;

[0058] The vertical rotation assembly 3 includes a guide cylinder 31 with a guide through hole that matches the size of the lightning protection wire. The lightning protection wire 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 to make the lightning protection wire form a second given angle with the horizontal plane.

[0059] The wind turbine blade lightning protection wire fixing device provided by this invention has a base 1 fixed to the root of the wind turbine blade. During operation, the root of the wind turbine blade bears enormous torsional and shear forces, resulting in concentrated stress and the greatest deformation. Therefore, placing the base 1 at the root of the wind turbine blade allows the lightning protection wire segment at the root to remain in a movable state, preventing the lightning protection wire from easily breaking at the root of the wind turbine blade. The base 1 fits tightly against the blade and is made of polyurethane material, giving it better plasticity and allowing it to better conform to the surface shape of the wind turbine blade. The horizontal rotating component 2 can rotate on the base 1. The horizontal rotating component 2 is connected to the guide cylinder 31 of the vertical rotating component 3, which is also connected to the horizontal rotating component 2. The guide cylinder 31 can also rotate vertically. When the horizontal rotating component 2 rotates horizontally on the base 1, it drives the guide cylinder 31 of the vertical rotating component 3 to rotate synchronously. Simultaneously, the guide cylinder 31 can also rotate vertically. In practical applications, the blade length direction refers to the extension direction from the blade root to the blade tip of the wind turbine blade. The first given angle refers to the angle α formed by the rotation of the horizontal rotating component 2 and the blade length direction axis L. Figure 1 , Figure 7 The angle α between the guide cylinder 31 and the axis L along the length 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 caused by the rotation of the vertical rotation assembly 3, i.e. Figure 1 , Figure 6 The guide cylinder 31 forms an angle β with the upper surface of the base 1. The lightning protection wire 00 passes through the guide hole of the guide cylinder 31, so that a portion of the lightning protection wire 00 is housed within the guide hole. When the wind turbine blade is running, the profile of the wind turbine blade changes, pulling the lightning protection wire on the wind turbine blade. Because a portion of the lightning protection wire is housed within the guide hole, when the lightning protection wire is pulled, the horizontal rotating component 2 rotates horizontally on the base 1, driving the vertical rotating component 3 and the guide cylinder 31 to rotate synchronously. At the same time, the guide cylinder 31 can also rotate vertically. Through the rotation of the horizontal rotating component 2 and the vertical rotating component 3, the lightning protection wire follows the profile of the wind turbine blade. The synchronous operation prevents the lightning protection wire from being damaged by the deformation of the wind turbine blade when it is fixed to the blade's profile. 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 protection wire segment located at the blade root tail is in a non-fixed state and can change with the shape of the wind turbine blade, thus preventing the lightning protection wire 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 protection wire installed on the blade is easily stretched and broken under the action of breathing force during the blade's operation.

[0060] In one embodiment, such as Figure 1 As shown, the horizontal rotation assembly 2 includes: a rotation seat 21;

[0061] The rotating base 21 has a base plate 210 that is rotatably mounted on the base 1 and two vertical plates 211 that are vertically arranged on the base plate 210 at a given interval. Each of the two vertical plates 211 has a mounting through hole, and the mounting through holes on the two vertical plates 211 are coaxially arranged.

[0062] The vertical rotation component 3 further includes: a rotation shaft 32;

[0063] The rotating shaft 32 is installed between the two vertical plates 211 through a mounting hole. The rotating shaft 32 can be rotatably installed in the mounting 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.

[0064] The base plate 210 of the rotating seat 21 is rotatably mounted on the base 1. Two vertical plates 211 are vertically mounted on the base plate 210. The rotating shaft 32 is located between the two vertical plates 211. Both ends of the rotating shaft 32 are rotatably mounted in corresponding mounting holes opened on the two vertical plates 211 of the rotating seat 21. The mounting holes are horizontally positioned. 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 vertically. The rotating seat 21 rotates, thereby driving the rotating shaft 32 and the guide cylinder 31 to rotate horizontally synchronously. Figure 1 As shown, the guide through hole of the guide cylinder 31 is perpendicular to the rotating shaft 32, ensuring that the guide cylinder 31 can rotate in the vertical direction, and further drive the lightning protection wire passing through the guide cylinder 31 to rotate.

[0065] To ensure smooth rotation of the horizontal rotating assembly 2 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 base plate portion 210 of the rotating seat 21 is provided with a rotating boss, which is rotatably mounted in the base mounting hole via the bearing. The rotating boss on the base 1 is embedded in the inner hole of the bearing, and the bearing ensures smooth rotation of the base 1.

[0066] In another embodiment, such as Figure 2 As shown, the guide cylinder 31 has a guide cylinder portion 310 and a connecting rod portion 311;

[0067] The guide hole is formed on the guide cylinder 310;

[0068] Both ends of the connecting rod 311 are rotatably installed in the corresponding mounting holes, and the guide tube 310 is movably connected to the vertical plate 211 through the connecting rod 311.

[0069] The guide cylinder portion 310 and the connecting rod portion 311 are integrally formed. The guide cylinder portion 310 has a hollow cylindrical structure, such as... Figure 2As shown, each vertical plate 211 is connected to a corresponding connecting rod 311. The connecting rod 311 is arranged along the radial direction of the guide tube 310 on the outer surface of the guide tube 310. The connecting rod 311 is rotatably installed in the mounting through hole on the corresponding vertical plate 211. The rotation of the connecting rod 311 drives the guide tube 310 to rotate in the vertical direction, thereby driving the lightning protection wire passing through the guide tube 310 to rotate. The integrally formed guide tube 31 has a compact structure.

[0070] To prevent wear on the lightning protection wire at both ends of the guide hole, a flange is applied to the openings at both ends of the guide hole. After the flange is applied, the openings at both ends of the guide hole are rounded, thus preventing wear on the lightning protection wire.

[0071] In yet another embodiment, such as Figure 3 As shown, the horizontal rotation assembly includes: a second rotating seat 22;

[0072] The second rotating base 22 has a second base plate portion 221 and a second vertical plate portion 222 vertically disposed on the second base plate portion 221. The second base plate portion 221 is rotatably disposed on the base 1, and the second vertical plate portion 222 is provided with a second mounting hole.

[0073] 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 mounting hole to movably connect the guide cylinder 31 to the second vertical plate 222.

[0074] A counterweight is provided on the second vertical plate 222.

[0075] like Figure 3 As shown, the second base plate 221 of the second rotating seat 22 is rotatably mounted on the base 1, and the second vertical plate 222 is vertically mounted on the second base plate 221. A second mounting hole is horizontally opened on the second vertical plate 222. A 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 mounted in the second mounting hole. The guide cylinder 31 can be driven to rotate in the vertical direction by rotating the short shaft 6. In order to avoid the second rotating seat 22 of the horizontal rotating assembly from becoming unbalanced due to uneven weight during the operation of the wind turbine blade, a counterweight is set on the second vertical plate 222 to balance the second rotating seat 22.

[0076] Another aspect of the present invention provides a control system for a wind turbine blade lightning protection wire fixing device, applied to the lightning protection wire fixing device described in the above-mentioned claim, the control system comprising:

[0077] The deformation detection module is installed at least at the root of the wind turbine blade to detect the amount of deformation of the wind turbine blade and output the corresponding electrical signal according to the amount of deformation.

[0078] The main control module is connected to the deformation detection module, the horizontal rotation component 2 and the vertical rotation component 3 by signal. It is used to process and analyze the electrical signals to obtain the deformation of the wind turbine blade, compare the deformation with the preset deformation, and output the corresponding horizontal rotation command according to the comparison result, and / or output the corresponding vertical rotation command according to the processing and analysis result.

[0079] A drive component, connected to the main control module via signals, is used to drive the horizontal rotation component to rotate according to the horizontal rotation command output by the main control module, and / or drive the vertical rotation component to rotate according to the vertical rotation command output by the main control module.

[0080] The main control module includes: a judgment unit and two control units;

[0081] The judgment unit is used to compare the deformation amount with the 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 less than the second preset deformation amount.

[0082] When the deformation is less than or equal to the first preset deformation, the first control unit outputs a corresponding horizontal rotation command to make the rotating seat of the horizontal rotation component or the second rotating seat rotate in the horizontal direction, so as to increase the first given angle between the lightning protection wire and the blade length direction; and / or outputs a corresponding vertical rotation command to make the guide cylinder of the vertical rotation component rotate in the vertical direction, so as to increase the second given angle between the lightning protection wire and the horizontal plane.

[0083] 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 shape of the blade.

[0084] When the deformation is greater than or equal to the second preset deformation, the second control unit outputs a corresponding horizontal rotation command to rotate the horizontal rotation in the horizontal direction, so as to reduce the first given angle between the lightning protection wire and the blade length direction; and / or outputs a corresponding vertical rotation command to rotate the guide cylinder of the vertical rotation assembly in the vertical direction, so as to reduce the second given angle between the lightning protection wire and the horizontal plane.

[0085] To ensure the lightning protection wire moves synchronously with the deformation of the wind turbine blades, the rotation angles of the horizontal rotation component 2 and the vertical rotation component 3 are controlled based on the deformation of the wind turbine blades. A deformation detection module is installed at the root of the wind turbine blades to detect the deformation and outputs a corresponding electrical signal to the main control module based on the deformation. The main control module analyzes and processes the electrical signal to obtain the deformation of the wind turbine blades. The deformation is compared with preset deformation values, which include a first preset deformation value and a second preset deformation value. A judgment unit compares the deformation with the first and second preset deformation values. The control unit issues corresponding horizontal and vertical rotation commands based on the judgment result. The control unit includes a first control unit and a second control unit. If the judgment unit determines that the deformation is less than or equal to the first preset deformation value, the first control unit issues a corresponding horizontal rotation command to the drive component. The drive component drives the rotating seat 21 or the second rotating seat 22 of the horizontal rotation component 2 to rotate, thereby increasing the first given angle. At the same time, the drive component drives the guide cylinder 31 of the vertical rotation component 3 to rotate, thereby increasing the second given angle. If the deformation is between the first preset deformation and the second preset deformation, the current state is maintained. The drive component does not drive the horizontal and vertical rotation components, and their rotation is not driven by the drive component, remaining in a non-fixed state. The horizontal and vertical rotation components can rotate freely with the shape changes 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 command to the drive component. The drive component drives the rotating seat 21 or the second rotating seat 22 of the horizontal rotation component 2 to rotate, thereby reducing the first given angle. At the same time, the drive component drives the guide cylinder 31 of the vertical rotation component 3 to rotate, thereby reducing the second given angle.

[0086] Another aspect of the present invention provides a control method for a wind turbine blade lightning protection wire fixing device, which is executed based on the control system of the wind turbine blade lightning protection wire fixing device described in any of the above claims, the control method comprising:

[0087] S1) Detect the deformation of the wind turbine blades and output the corresponding electrical signal based on the deformation.

[0088] S2) Process and analyze the electrical signal to obtain the deformation amount of the wind turbine blade, compare the deformation amount with the preset deformation amount, output the corresponding horizontal rotation command to the horizontal rotation component to make the horizontal rotation component rotate in the horizontal direction by a first given angle, and / or output the corresponding vertical rotation command to the vertical rotation component to make the vertical rotation component rotate in the vertical direction by a second given angle.

[0089] S3) Drive the horizontal rotation component to rotate according to the horizontal rotation command output by the main control module and / or drive the vertical rotation component to rotate according to the vertical rotation command output by the main control module.

[0090] In step S2), the deformation amount is compared with the preset deformation amount, and a corresponding horizontal rotation command is output to the horizontal rotation component based on the comparison result, so that the lightning protection wire and the blade length direction form a first given angle, and / or a corresponding vertical rotation command is output to the vertical rotation component based on the processing and analysis results, so that the lightning protection wire and the horizontal plane form a second given angle, including:

[0091] The deformation amount is compared with the first preset deformation amount and the second preset deformation amount;

[0092] If the deformation is less than or equal to the first preset deformation, the corresponding horizontal rotation command is output to make the rotating seat or the second rotating seat of the horizontal rotation component rotate in the horizontal direction, so as to increase the first given angle between the lightning protection wire and the blade length direction; and / or the corresponding vertical rotation command is output to make the guide cylinder of the vertical rotation component rotate in the vertical direction, so as to increase the second given angle between the lightning protection wire and the horizontal plane.

[0093] 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 shape of the blade.

[0094] If the deformation is greater than or equal to the second preset deformation, the corresponding horizontal rotation command is output to rotate the horizontal rotation in the horizontal direction, so as to reduce the first given angle between the lightning protection wire and the blade length direction; and / or the corresponding vertical rotation command is output to rotate the guide cylinder of the vertical rotation component in the vertical direction, so as to reduce the second given angle between the lightning protection wire and the horizontal plane.

[0095] Detecting the deformation of wind turbine blades includes detecting the deformation at the blade root.

[0096] Because the deformation at the root of the wind turbine blade is the greatest, the lightning protection wire segment fixed at the root of the wind turbine blade is most likely to break due to the deformation at the root. Therefore, in the specific scheme of step S1), the deformation of the wind turbine blade can be detected directly by detecting the deformation at the root of the blade.

[0097] The deformation detection module for wind turbine blades can include piezoelectric patches and a signal transmission module. Multiple piezoelectric patches can be embedded at the root of the wind turbine blade. When the wind turbine blade rotates, it bends and deforms. At this time, the piezoelectric patches generate voltage signals. The signal transmission module transmits the collected voltage signals to the main control module. After processing and analysis by the main control module, the results are stored and visualized, which can intuitively show the deformation at the blade root.

[0098] In another specific approach, the root deformation of the wind turbine blades can be calculated by detecting the vibration of the blades. Alternatively, the root deformation can be calculated by detecting the wind speed.

[0099] The deformation amount is compared with the preset deformation amount, and the corresponding horizontal rotation command and the corresponding vertical rotation command are output according to the comparison result. The specific scheme can be as follows:

[0100] The preset deformation includes a first preset deformation and a second preset deformation, wherein the first preset deformation is less than the second preset deformation; the first given angle refers to the angle α formed by the rotation of the horizontal rotating component 2 and the axis L along the length direction of the blade. Figure 1 , Figure 7 The angle α between the guide cylinder 31 and the blade length axis L; the second given angle refers to the spatial angle β between the axis of the guide cylinder 31 and the upper surface of the base 1 caused by the rotation of the vertical rotation component 3, that is, as shown in the figure. Figure 1 , Figure 6 The angle β between the guide cylinder 31 and the upper surface of the base 1.

[0101] The detected deformation amount is compared with the first preset deformation amount and the second preset deformation amount;

[0102] If the deformation is less than or equal to the first preset deformation, it indicates that the current blade deformation is small, and the required length of the lightning protection wire to match the blade is short. Figure 7 As shown, at this time, the rotating seat 21 of the horizontal rotating component 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 component 3 and the blade length direction axis L gradually decreases to 0°, that is, the angle α between the axial direction of the guide cylinder 31 and the blade length direction axis L is 90°, that is, the first given angle is 90°; at the same time, as Figure 6As shown, the vertical rotation component 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 protection wire can extend along an "S-shaped" curve in both directions of the wind turbine blade profile and / or the vertical wind turbine blade profile. By rotating the horizontal rotation component 2 and the vertical rotation component 3, the lightning protection wire is tightened, thereby avoiding the phenomenon of tangling and knotting caused by excessive suspension length of the lightning protection wire.

[0103] 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 current deformation of the blade is within a moderate range, and the length of the lightning protection wire that needs to be matched with the blade is also moderate. At this time, the horizontal and vertical rotating components can be left uncontrolled, so that the lightning protection wire segment located at the tail of the blade root is in a non-fixed state, but changes with the shape of the wind turbine blade. The horizontal and vertical rotating components swing freely with the rotation of the blade, which solves the problem that the lightning protection wire is easily stretched and broken under the action of breathing force during the operation of the blade.

[0104] If the deformation exceeds the second preset deformation, it indicates that the current blade deformation is within a large range. Because the large deformation of the wind turbine blade has tightened the lightning protection wire, it is necessary to loosen the lightning protection wire to prevent it from being broken. Figure 5 As shown, at this time, the rotating seat 21 of the horizontal rotating component 2 can be controlled to rotate so that the angle between the rotating shaft 32 of the vertical rotating component 3 and the blade length direction gradually increases until it reaches 90°, thereby ensuring that the angle α between the axial extension direction of the lightning protection wire guide tube 31 and the blade length direction axis L is 0°, that is, the first given angle is 0°; at the same time, as Figure 4 As shown, the vertical rotation component 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 protection wire extends along the length of the blade as a whole, thereby avoiding problems such as the lightning protection wire being unable to match the large deformation of the wind turbine blade and being stretched and broken.

[0105] By setting three preset deformation ranges, the bending configuration of the lightning protection wire is matched to the wind turbine blades under different wind conditions and deformation amounts. This avoids tangling and knotting of the lightning protection wire due to excessive suspension length when the blade deformation is small, and also prevents the lightning protection wire from being stretched and broken when the blade deformation is large. Furthermore, in many cases, by reasonably calculating and setting the dimensions of the lightning protection wire fixing device and the length of the lightning protection wire, when the blade deformation is within the normal range, no control is needed. The fixing device can swing freely with the blade rotation, which can prevent the lightning protection wire from being stretched and broken or tangled due to the blade's breathing effect. Moreover, this method only requires control when the deformation at the blade root is large or small, resulting in low overall control costs.

[0106] It should be noted that the above control method is not limited to matching three control methods according to three deformation ranges, but can also match two control methods according to two deformation ranges.

[0107] 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 increased; 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 decreased, which can achieve a similar effect.

[0108] The drive assembly includes a first horizontal driver, a vertical driver, a second horizontal driver, and a second vertical driver. All three drivers are connected to the main control module via signals. The first horizontal driver is mounted on the base 1 and drives the rotating seat 21 to rotate on the base 1 according to a horizontal rotation command. The vertical driver is mounted on any vertical plate 211 and drives the rotating shaft 32 to rotate according to a vertical rotation command, thereby causing the guide cylinder 31, which is fixed to the rotating shaft 32, to rotate. The second horizontal driver is mounted on the base 1 and drives the second rotating seat 22 to rotate according to a horizontal rotation command. The second vertical driver is mounted on the second vertical plate 222 and can drive the short shaft 6 to rotate, thereby causing the guide cylinder 31 to rotate.

[0109] The present invention provides a wind turbine blade lightning protection wire fixing device. A base is fixed to the root of the wind turbine blade. A horizontal rotating assembly is mounted on the base, capable of rotating horizontally. A guide cylinder of a vertical rotating assembly is movably connected to the horizontal rotating assembly, allowing the guide cylinder to rotate vertically. The lightning protection wire installed on the wind turbine blade passes through a guide hole in the guide cylinder, allowing a portion of the lightning protection wire segment to be accommodated within the guide hole. During wind turbine blade operation, changes in the blade profile pull the lightning protection wire passing through the guide cylinder. As the horizontal rotating assembly rotates horizontally on the base, it drives the guide cylinder of the vertical rotating assembly to rotate synchronously. Simultaneously, the guide cylinder can also rotate vertically by a second given angle. Thus, the lightning protection wire segment located at the blade root tail is in a non-fixed state, changing with the blade profile and preventing breakage. The wind turbine blade lightning protection wire fixing device, control system, and control method provided by the present invention solve the problem in the prior art where lightning protection wires installed on blades are easily stretched and broken under the action of breathing force during blade operation.

[0110] The optional embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above embodiments. Within the scope of the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all fall within the protection scope of the embodiments of the present invention.

[0111] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not describe the various possible combinations separately.

[0112] Furthermore, various different implementations of the present invention can be combined arbitrarily, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed in the present invention.

Claims

1. A lightning protection wire fixing device for wind turbine blades, used to support the lightning protection wire of wind turbine blades, characterized in that, The wind turbine blade lightning protection wire fixing device includes: The base (1) is used to fix the blade to the root of the wind turbine blade; The horizontal rotation component (2) is movably mounted on the base (1) and can rotate in the horizontal direction so that the lightning protection wire forms a first given angle with the blade length direction; The vertical rotation assembly (3) includes a guide cylinder (31) having a guide through hole that matches the size of the lightning protection wire. The lightning protection wire 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 to make the lightning protection wire form a second given angle with the horizontal plane.

2. The wind turbine blade lightning protection wire fixing device according to claim 1, characterized in that, The horizontal rotation assembly (2) includes: a rotating base (21); The rotating base (21) has a base plate (210) that is rotatably mounted on the base (1) and two vertical plates (211) that are vertically fixed on the base 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.

3. The wind turbine blade lightning protection wire fixing device according to claim 2, characterized in that, The vertical rotation component (3) further includes: a rotation shaft (32); The rotating shaft (32) is set between two vertical plates (211) through a mounting hole. The rotating shaft (32) can be rotatably installed in the mounting 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 protection wire fixing device according to claim 2, characterized in that, The guide cylinder (31) has a guide cylinder part (310) and a connecting rod part (311). The guide hole is formed on the guide tube part (310); The two ends of the connecting rod (311) are rotatably set in the corresponding mounting holes, and the guide tube (310) is movably connected to the vertical plate (211) through the connecting rod (311).

5. The wind turbine blade lightning protection wire fixing device according to claim 1, characterized in that, The horizontal rotation assembly includes: a second rotating seat (22); The second rotating seat (22) has a second base plate (221) and a second vertical plate (222) vertically disposed on the second base plate (221). The second base plate (221) is rotatably disposed on the base (1), and a second mounting hole is provided on the second vertical plate (222).

6. The wind turbine blade lightning protection wire fixing device according to claim 5, characterized in that, 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 mounting hole to movably connect the guide cylinder (31) to the second vertical plate (222).

7. A control system for a wind turbine blade lightning protection wire fixing device, applied to the wind turbine blade lightning protection wire fixing device according to any one of claims 1-6, characterized in that, The control system includes: The deformation detection module is installed at least at the root of the wind turbine blade to detect the amount of deformation of the wind turbine blade and output the corresponding electrical signal according to the amount of deformation. The main control module is connected to the deformation detection module, the horizontal rotation component, and the vertical rotation component by signal. It is used to process and analyze the electrical signals to obtain the deformation of the wind turbine blade, compare the deformation with the preset deformation, and output the corresponding horizontal rotation command based on the comparison result, and / or output the corresponding vertical rotation command based on the processing and analysis result. The drive component is connected to the main control module via a 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 protection wire is at a first given angle with the blade length direction, 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 protection wire is at a second given angle with the horizontal plane.

8. The control system for the wind turbine blade lightning protection wire fixing device according to claim 7, characterized in that, The main control module includes: a judgment unit and two control units; The judgment unit is used to compare the deformation amount with the 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 less than the second preset deformation amount. When the deformation is less than or equal to the first preset deformation, the first control unit outputs a corresponding horizontal rotation command to make the rotating seat of the horizontal rotation component or the second rotating seat rotate in the horizontal direction, so as to increase the first given angle between the lightning protection wire and the blade length direction; and / or outputs a corresponding vertical rotation command to make the guide cylinder of the vertical rotation component rotate in the vertical direction, so as to increase the second given angle between the lightning protection wire and the horizontal plane. 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 shape of the blade. When the deformation is greater than or equal to the second preset deformation, the second control unit outputs a corresponding horizontal rotation command to make the rotating seat of the horizontal rotation component or the second rotating seat rotate in the horizontal direction, so as to reduce the first given angle between the lightning protection wire and the blade length direction; and / or outputs a corresponding vertical rotation command to make the guide cylinder of the vertical rotation component rotate in the vertical direction, so as to reduce the second given angle between the lightning protection wire and the horizontal plane.

9. A control method for a lightning protection wire fixing device for wind turbine blades, executed based on the control system of the lightning protection wire fixing device according to any one of claims 7-8, characterized in that, The control method includes: S1) Detect the deformation of the wind turbine blades and output the corresponding electrical signal based on the deformation. S2) Process and analyze the electrical signal to obtain the deformation of the wind turbine blade, compare the deformation with the preset deformation, output the corresponding horizontal rotation command to the horizontal rotation component according to the comparison result, so that the lightning protection wire is at a first given angle with the blade length direction, and / or output the corresponding vertical rotation command to the vertical rotation component according to the processing and analysis result, so that the lightning protection wire is at a second given angle with the horizontal plane. S3) Drive the horizontal rotation component to rotate according to the horizontal rotation command output by the main control module and / or drive the vertical rotation component to rotate according to the vertical rotation command output by the main control module.

10. The control method for the wind turbine blade lightning protection wire 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 command is output to the horizontal rotation component based on the comparison result, so that the lightning protection wire and the blade length direction form a first given angle, and / or a corresponding vertical rotation command is output to the vertical rotation component based on the processing and analysis results, so that the lightning protection wire and the horizontal plane form a second given angle, including: The deformation amount is compared with the first preset deformation amount and the second preset deformation amount; If the deformation is less than or equal to the first preset deformation, then the corresponding horizontal rotation command is output to make the rotating seat or the second rotating seat of the horizontal rotation component rotate in the horizontal direction, so as to increase the first given angle between the lightning protection wire and the blade length direction; and / or the corresponding vertical rotation command is output to make the guide cylinder of the vertical rotation component rotate in the vertical direction, so as to increase the second given angle between the lightning protection wire and the horizontal plane. 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 shape of the blade. If the deformation is greater than or equal to the second preset deformation, the corresponding horizontal rotation command is output to rotate the horizontal rotation in the horizontal direction, so as to reduce the first given angle between the lightning protection wire and the blade length direction; and / or the corresponding vertical rotation command is output to rotate the guide cylinder of the vertical rotation component in the vertical direction, so as to reduce the second given angle between the lightning protection wire and the horizontal plane.

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