Methods, equipment, and media for adjusting the overall load safety factor of wind turbine generator sets

Abstract

This application discloses a method, device, and medium for adjusting the overall load safety factor of a wind turbine, relating to the field of wind turbine technology. Based on structural parameters and state parameters, the method calculates the six-component gravity load of the blades in the tower base coordinate system. The six-component gravity load of the blades in the blade root coordinate system is obtained through a tower base-blade root coordinate system transformation matrix. Combining the six-component gravity load of the blades in the rotating hub coordinate system and the hub gravity, the six-component gravity load of the hub in the rotating hub coordinate system is obtained and converted to the six-component gravity load of the hub in the fixed hub coordinate system. Combining the six-component gravity load of the hub in the fixed hub coordinate system and the nacelle mass, the six-component gravity load of the tower top in the tower top coordinate system is calculated. Finally, combining the six-component gravity load of the tower top and the tower mass, the six-component gravity load of the tower at any cross-section in the tower base coordinate system is calculated. This application enables adjustment of the overall load safety factor of the wind turbine, improving the structural design and optimization level of wind turbines.

Description

Technical Field

[0001] This invention relates to the field of wind turbine technology, and in particular to a method, equipment and medium for adjusting the overall load safety factor of a wind turbine. Background Technology

[0002] With the trend towards larger wind turbines, ultra-long blades, ultra-heavy nacelles, and ultra-high towers pose innovative design bottlenecks for the overall structure and load. In the design of key components such as blades, hubs, nacelles, and towers of existing wind turbines, the load sub-item safety factor can only be taken as the standard value of 1.35, resulting in design redundancy that is difficult to optimize, leading to a large overall weight and making it impossible to achieve the ultimate optimization that balances reliability and cost.

[0003] As can be seen from the above, how to adjust the overall load safety factor of wind turbine units, thereby improving the structural design and optimization level of wind turbine units, is a problem that needs to be solved in this field. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a method, device, and medium for adjusting the overall load safety factor of a wind turbine generator set, which can adjust the overall load safety factor of the wind turbine generator set, thereby improving the structural design and optimization level of the wind turbine generator set. The specific solution is as follows:

[0005] In a first aspect, this application discloses a method for adjusting the overall load safety factor of a wind turbine generator set, including:

[0006] Obtain the structural and state parameters of the wind turbine generator;

[0007] The six-component gravity load of the blade in the tower base coordinate system is calculated based on the structural parameters and the state parameters. The six-component gravity load of the blade is then converted into the six-component gravity load of the blade in the blade root coordinate system through the tower base-blade root coordinate system transformation matrix.

[0008] The blade six-component gravity load is converted from the blade root coordinate system to the rotating hub coordinate system, and the hub gravity calculated based on the structural parameters is converted from the tower bottom coordinate system to the rotating hub coordinate system. The six-component gravity load of the hub in the rotating hub coordinate system is then superimposed to obtain the hub six-component gravity load.

[0009] The six-component gravity load of the hub in the rotating hub coordinate system is converted into the six-component gravity load of the hub in the fixed hub coordinate system;

[0010] Combining the six-component gravity load of the hub in the fixed hub coordinate system and the nacelle mass in the structural parameters, the six-component gravity load of the tower top in the tower top coordinate system is calculated using the wind turbine-tower top coordinate system transformation matrix.

[0011] Combining the six-component gravity load at the top of the tower and the tower mass in the structural parameters, the six-component gravity load of the tower at any section in the tower base coordinate system is calculated using the tower top-to-tower base coordinate system transformation matrix;

[0012] The safety factor of the overall load of the wind turbine is adjusted based on the six-component gravity load of the blade, the six-component gravity load of the hub, the six-component gravity load of the tower top, and the six-component gravity load of the tower.

[0013] Optionally, obtaining the structural parameters and state parameters of the wind turbine includes:

[0014] The structural parameters of the wind turbine are obtained from the Bladed wind turbine model. The structural parameters include blade node position, blade mass distribution per unit length, blade cone angle, drive train tilt angle, hub mass, hub radius, hub center of gravity position, nacelle mass, nacelle center of gravity position, tower mass, and tower mass distribution.

[0015] The state parameters of the wind turbine are obtained from the simulation results data of the Bladed wind turbine model; the state parameters include blade nodal coordinates, blade pitch angle, nacelle motion, and rotor azimuth angle.

[0016] Optionally, the six-component gravity load of the blade in the tower base coordinate system is:

[0017]

[0018] in, The total gravitational load on the blade segments from a certain node j to the blade tip is given by the blade. The six-component gravity load of the blade is given in the coordinate system at the base of the tower; n is the number of blade nodes; n-1 is the number of blade segments; i is a certain blade segment from node j to the blade tip, i = j, j+1, ..., n-1; m i x represents the mass of a segment of the blade. i y i x represents the centroid coordinates of a segment of the blade. j y j Let be the coordinates of blade node j; g is the gravity coefficient.

[0019] Optionally, the step of converting the six-component gravity load of the blade into the six-component gravity load of the blade in the blade root coordinate system using the tower-root coordinate system transformation matrix includes:

[0020] The coordinate transformation matrix characterizing the inclination angle of the transmission chain and the coordinate transformation matrix characterizing the cone angle of the blade are constructed using the structural parameters.

[0021] The coordinate transformation matrices representing the nacelle motion, the wind turbine rotation, and the blade pitch angle are constructed using the state parameters.

[0022] The six-component gravity load of the blade in the tower base coordinate system is converted to the six-component gravity load of the blade in the blade root coordinate system using the coordinate transformation matrices described above; the six-component gravity load of the blade in the blade root coordinate system is:

[0023]

[0024] Among them, A TN A is the coordinate transformation matrix characterizing the cabin motion; NH A is the coordinate transformation matrix characterizing the inclination angle of the transmission chain; SR A is the coordinate transformation matrix representing the rotation of the wind turbine; RC A is the coordinate transformation matrix characterizing the blade cone angle; CB The coordinate transformation matrix representing the pitch angle; F B M B The six-component gravity load of the blade is given in the blade root coordinate system.

[0025] Optionally, the step of converting the six-component gravity load of the blade from the blade root coordinate system to the rotating hub coordinate system, converting the hub gravity calculated based on structural parameters from the tower base coordinate system to the rotating hub coordinate system, and superimposing them to obtain the six-component gravity load of the hub in the rotating hub coordinate system; and converting the six-component gravity load of the hub in the rotating hub coordinate system to the six-component gravity load of the hub in the fixed hub coordinate system includes:

[0026] Based on the moment translation theorem, the six-component gravity load of the blade is transformed from the blade root coordinate system to the rotating hub coordinate system;

[0027] The wheel hub weight is calculated based on the wheel hub mass, wheel hub radius, and wheel hub center of gravity position in the structural parameters, and the wheel hub weight is converted from the tower base coordinate system to the rotating wheel hub coordinate system;

[0028] The six-component gravity load of the blade and the gravity of the hub are superimposed in the rotating hub coordinate system, and the six-component gravity load of the hub in the rotating hub coordinate system is calculated using the blade root-wind turbine coordinate system transformation matrix; the six-component gravity load of the hub in the rotating hub coordinate system is:

[0029]

[0030] Among them, F Rx F Ry F Rz M Rx M Ry M RzF″ represents the six-component gravity load of the hub in the rotating hub coordinate system. x1 、F″ y1 、F″ z1 M″ x1 M″ y1 M″ z1 F″ represents the six-component gravity load on the first blade in the rotating hub coordinate system. x2 、F″ y2 、F″ z2 M″ x2 M″ y2 M″ z2 F″ represents the six-component gravity load on the second blade in rotating hub coordinates. z3 、F″ y3 、F″ z3 M″ x3 M″ y3 M″ z3 The blade six-component gravity load is given in the rotating hub coordinate system. The gravitational load generated by the hub mass in the rotating hub coordinate system;

[0031] The six-component gravity load of the wheel hub in the fixed hub coordinate system is:

[0032]

[0033] Among them, F Sx F Sy F Sz M Sx M Sy M Sz The six-component gravity load of the wheel hub is defined in a fixed hub coordinate system; θ azi This is the azimuth angle of the wind turbine.

[0034] Optionally, combining the six-component gravity load of the hub in the fixed hub coordinate system and the nacelle mass in the structural parameters, the six-component gravity load of the tower top in the tower top coordinate system is calculated using the wind turbine-tower top coordinate system transformation matrix, including:

[0035] Based on the moment translation theorem, the six-component gravity load of the hub is transformed from the fixed hub coordinate system to the tower top coordinate system;

[0036] The nacelle mass in the structural parameters is transformed from the base coordinate system to the top coordinate system, and the gravitational moment generated by the nacelle mass at the top of the tower is calculated.

[0037] The six-component gravity load of the hub, the nacelle mass, and the gravitational moment are superimposed in the tower top coordinate system, and the six-component gravity load of the tower top in the tower top coordinate system is calculated using the wind turbine-tower top coordinate system transformation matrix: The six-component gravity load of the tower top in the tower top coordinate system is:

[0038]

[0039] Among them, F Nx F Ny F Nz M Nx M Ny M Nz F′ represents the six-component gravity load at the top of the tower in the tower top coordinate system. Sx F′ Sy F′ Sz M′ Sx M′ Sy M′ Sz The six-component gravity load of the wheel hub in the tower top coordinate system; m Nac For cabin weight; θ Roll θ Nod For cabin roll angle and pitch angle; l x l y This refers to the longitudinal and lateral positions of the cabin's center of gravity.

[0040] Optionally, the step of combining the six-component gravity load at the top of the tower and the tower mass in the structural parameters, and calculating the six-component gravity load of the tower at any cross-section in the tower base coordinate system using the tower top-to-tower base coordinate system transformation matrix, includes:

[0041] Based on the moment translation theorem, the six-component gravity load at the top of the tower is transformed from the top coordinate system to the bottom coordinate system.

[0042] The tower mass is superimposed on the structural parameters, and the six-component gravity load of the tower at any cross-section in the tower base coordinate system is calculated using the tower top-to-tower coordinate system transformation matrix; the six-component gravity load of the tower at any cross-section in the tower base coordinate system is:

[0043]

[0044] Among them, F Tx F Ty F Tz M Tx M Ty M Tz Let H be the six-component gravity load of the tower at any cross-section in the tower base coordinate system; H be the total height of the tower; and h be the height of a certain cross-section of the tower. denoted as , where is the tower weight above the corresponding cross-section; g is the gravity coefficient.

[0045] Optionally, the method for adjusting the overall load safety factor of the wind turbine generator set further includes:

[0046] If any of the six-component gravity loads of the blades, hub, tower top, and tower is an unfavorable load, then the overall load safety factor of the wind turbine will be adjusted as follows:

[0047] γ f =1.1+0.25ξ 2 ;

[0048]

[0049] Among them, F gravity Let F be any component of the six-component gravity load of the blade, hub, tower top, and tower frame, and let F be any component of the corresponding total six-component load. k The component load timing is for components with an adjusted safety factor.

[0050] Secondly, this application discloses an electronic device, comprising:

[0051] Memory, used to store computer programs;

[0052] A processor is used to execute the computer program to implement the aforementioned method for adjusting the overall load safety factor of the wind turbine.

[0053] Thirdly, this application discloses a computer storage medium for storing a computer program; wherein, when the computer program is executed by a processor, it implements the steps of the aforementioned wind turbine load safety factor adjustment method.

[0054] As can be seen, this application provides a method for adjusting the overall load safety factor of a wind turbine, including obtaining the structural parameters and state parameters of the wind turbine; calculating the six-component gravity load of the blades in the tower base coordinate system based on the structural parameters and the state parameters, and converting the six-component gravity load of the blades into the six-component gravity load of the blades in the blade root coordinate system through a tower base-blade root coordinate system transformation matrix; converting the six-component gravity load of the blades from the blade root coordinate system to the rotating hub coordinate system, converting the hub gravity calculated based on the structural parameters from the tower base coordinate system to the rotating hub coordinate system, and superimposing them to obtain the six-component gravity load of the hub in the rotating hub coordinate system; and converting the six-component gravity load of the hub in the rotating hub coordinate system... The load is converted into the six-component gravity load of the hub in a fixed hub coordinate system; combining the six-component gravity load of the hub in the fixed hub coordinate system and the nacelle mass in the structural parameters, the six-component gravity load of the tower top in the tower top coordinate system is calculated using the wind turbine-tower top coordinate system transformation matrix; combining the six-component gravity load of the tower top and the tower mass in the structural parameters, the six-component gravity load of the tower at any section in the tower bottom coordinate system is calculated using the tower top-tower bottom coordinate system transformation matrix; the safety factor of the overall load of the wind turbine is adjusted based on the six-component gravity load of the blade, the six-component gravity load of the hub, the six-component gravity load of the tower top, and the six-component gravity load of the tower. This application calculates the six-component gravity load of the blade in the blade root coordinate system, the six-component gravity load of the hub in the fixed hub coordinate system, the six-component gravity load of the tower top in the tower top coordinate system, and the six-component gravity load of the tower in the tower bottom coordinate system. This enables the comprehensive calculation and solution of the gravity load of the entire wind turbine as a deterministic load. By utilizing the six-component gravity loads of the blade, hub, tower top, and tower bottom, the safety factor of the overall load of the wind turbine can be adjusted, thereby improving the structural design and optimization level of the wind turbine. Attached Figure Description

[0055] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0056] Figure 1 This application discloses a flowchart of a method for adjusting the overall load safety factor of a wind turbine generator set.

[0057] Figure 2 This application discloses an overall flowchart for adjusting the safety factor.

[0058] Figure 3This is a comparison diagram of the time history curves of the leaf root load and its gravity load components in a leaf root coordinate system disclosed in this application.

[0059] Figure 4 This is a comparison diagram of the time history curves of hub load and its gravity load components in a rotating hub coordinate system disclosed in this application;

[0060] Figure 5 This is a comparison diagram of the time history curves of the tower top load and its gravity load components in a tower top coordinate system disclosed in this application;

[0061] Figure 6 This is a comparison diagram of the time history curves of the tower base load and its gravity load components in a tower base coordinate system disclosed in this application;

[0062] Figure 7 This application provides a structural diagram of an electronic device. Detailed Implementation

[0063] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0064] With the trend towards larger wind turbines, ultra-long blades, ultra-heavy nacelles, and ultra-high towers present innovative design bottlenecks for the overall structure and load. In the current design of key components such as blades, hubs, nacelles, and towers, the load safety factor can only be taken as the standard value of 1.35. This results in design redundancy that is difficult to optimize, leading to a large overall weight and making it impossible to achieve optimal balance between reliability and cost. Therefore, how to adjust the overall load safety factor of wind turbines to improve their structural design and optimization is a problem that needs to be solved in this field.

[0065] See Figure 1 As shown in the figure, an embodiment of the present invention discloses a method for adjusting the overall load safety factor of a wind turbine, which may specifically include:

[0066] Step S11: Obtain the structural parameters and state parameters of the wind turbine.

[0067] In this embodiment, the process for obtaining the structural parameters and state parameters of the wind turbine is as follows: The structural parameters of the wind turbine are obtained from the Bladed wind turbine model; these parameters include blade nodal positions, blade mass distribution per unit length, blade cone angle, drive train tilt angle, hub mass, hub radius, hub center of gravity position, nacelle mass, nacelle center of gravity position, tower mass, and tower mass distribution; the state parameters of the wind turbine are obtained from the simulation results data of the Bladed wind turbine model; these parameters include blade nodal coordinates, blade pitch angle, nacelle motion, and rotor azimuth angle.

[0068] Step S12: Calculate the six-component gravity load of the blade in the tower base coordinate system based on the structural parameters and the state parameters, and convert the six-component gravity load of the blade into the six-component gravity load of the blade in the blade root coordinate system through the tower base-blade root coordinate system transformation matrix.

[0069] Since the blade nodal coordinates describe the blade nodal motion information in the tower base coordinate system, they can reflect the influence of blade deformation on the blade's gravitational load. For a certain node j of the blade, the gravitational load on each blade segment from that point to the blade tip is the six-component gravitational load of the blade in the tower base coordinate system:

[0070]

[0071] in, The total gravitational load on the blade segments from a certain node j to the blade tip is given by the blade. The six-component gravity load of the blade is given in the coordinate system at the base of the tower; n is the number of blade nodes; n-1 is the number of blade segments; i is a certain blade segment from node j to the blade tip, i = j, j+1, ..., n-1; m i x represents the mass of a segment of the blade. i , y i represents the centroid coordinate of a segment of the blade; x j y j Let be the coordinates of blade node j; g is the gravity coefficient.

[0072] In this embodiment, the process of converting the six-component gravity load of the blade into the six-component gravity load of the blade in the blade root coordinate system is as follows: Using the structural parameters, construct coordinate transformation matrices representing the drive train tilt angle and the blade cone angle; using the state parameters, construct coordinate transformation matrices representing the nacelle motion, the rotor rotation, and the pitch angle; considering nacelle motion, drive train tilt angle, rotor rotation, blade cone angle, and blade pitch, convert the six-component gravity load of the blade in the tower base coordinate system into the six-component gravity load of the blade in the blade root coordinate system through each of the coordinate transformation matrices; therefore, the six-component gravity load of the blade in the blade root coordinate system is:

[0073]

[0074] Among them, A TN A is the coordinate transformation matrix characterizing the cabin motion; NH A is the coordinate transformation matrix characterizing the inclination angle of the transmission chain; SR A is the coordinate transformation matrix representing the rotation of the wind turbine; RC A is the coordinate transformation matrix characterizing the blade cone angle; CB The coordinate transformation matrix representing the pitch angle; F B M B The six-component gravity load of the blade is given in the blade root coordinate system.

[0075] Step S13: Convert the six-component gravity load of the blade from the blade root coordinate system to the rotating hub coordinate system, convert the hub gravity calculated based on the structural parameters from the tower base coordinate system to the rotating hub coordinate system, and superimpose them to obtain the six-component gravity load of the hub in the rotating hub coordinate system.

[0076] In this embodiment, considering blade pitch, blade cone angle, and hub radius, based on the moment translation theorem, the six-component gravity load of the blade calculated in step S12 is transformed from the blade root coordinate system to the rotating hub coordinate system. The hub gravity is calculated based on the hub mass, hub radius, and hub center of gravity position in the structural parameters. The hub gravity is then transformed from the tower base coordinate system to the rotating hub coordinate system. Considering nacelle motion, transmission chain tilt angle, and rotor rotation, the six-component gravity load of the blade and the hub gravity in the rotating hub coordinate system are superimposed. Finally, the six-component gravity load of the hub in the rotating hub coordinate system is calculated using the blade root-rotor coordinate system transformation matrix. The six-component gravity load of the hub in the rotating hub coordinate system is:

[0077]

[0078] Among them, F Rx F Ry F Rz M Rx M Ry M Rz F″ represents the six-component gravity load of the hub in the rotating hub coordinate system. x1 、F″ y1 、F″ z1 M″ x1 M″ y1 M″ z1 F″ represents the six-component gravity load on the first blade in the rotating hub coordinate system. x2 、F″ y2 、F″ z2 M″ x2 M″ y2 M″z2 F″ represents the six-component gravity load on the second blade in rotating hub coordinates. x3 、F″ y3 、F″ z3 M″ x3 M″ y3 M″ z3 The blade six-component gravity load is given in the rotating hub coordinate system. This represents the gravitational load generated by the hub mass in the rotating hub coordinate system.

[0079] Step S14: Convert the six-component gravity load of the hub in the rotating hub coordinate system into the six-component gravity load of the hub in the fixed hub coordinate system.

[0080] In this embodiment, considering the change in the wind turbine azimuth angle, the hub gravity load in the rotating hub coordinate system is transformed into the six-component hub gravity load in the fixed hub coordinate system as follows:

[0081]

[0082] Among them, F Sx F Sy F Sz M Sx M Sy M Sz The six-component gravity load of the wheel hub is defined in a fixed hub coordinate system; θ azi This is the azimuth angle of the wind turbine.

[0083] Step S15: Combining the six-component gravity load of the hub in the fixed hub coordinate system and the nacelle mass in the structural parameters, calculate the six-component gravity load of the tower top in the tower top coordinate system using the wind turbine-tower top coordinate system transformation matrix.

[0084] In this embodiment, considering the hub center of gravity position and drive train tilt angle, based on the torque translation theorem, the six-component gravity load of the hub obtained in step S14 is transformed from the fixed hub coordinate system to the tower top coordinate system. Considering the nacelle motion, the nacelle mass is transformed from the tower base coordinate system to the tower top coordinate system, and the gravitational torque generated by the nacelle mass at the tower top is calculated considering the nacelle center of gravity position. The six-component gravity load of the hub, the nacelle mass, and the gravitational torque in the tower top coordinate system are superimposed, and the six-component gravity load at the tower top coordinate system is calculated using the wind turbine-tower top coordinate system transformation matrix; the six-component gravity load at the tower top coordinate system is:

[0085]

[0086] Among them, F Nx F Ny F Nz M NxM Ny M Nz F′ represents the six-component gravity load at the top of the tower in the tower top coordinate system. Sx F′ Sy F′ Sz M′ Sx M′ Sy M′ Sz The six-component gravity load of the wheel hub in the tower top coordinate system; m Nac For cabin weight; θ Roll θ Nod For cabin roll angle and pitch angle; l x l y This refers to the longitudinal and lateral positions of the cabin's center of gravity.

[0087] Step S16: Combining the six-component gravity load at the top of the tower and the tower mass in the structural parameters, calculate the six-component gravity load of the tower at any cross-section in the tower base coordinate system using the tower top-to-tower base coordinate system transformation matrix.

[0088] In this embodiment, based on the moment translation theorem, the six-component gravity load at the top of the tower is transformed from the top coordinate system to the bottom coordinate system. Considering the nacelle motion and superimposing the tower mass in the structural parameters, the six-component gravity load of the tower at any cross-section in the bottom coordinate system is calculated using the top-to-bottom coordinate system transformation matrix. The six-component gravity load of the tower at any cross-section in the bottom coordinate system is:

[0089]

[0090] Among them, F Tx F Ty F Tz M Tx M Ty M Tz Let H be the six-component gravity load of the tower at any cross-section in the tower base coordinate system; H be the total height of the tower; and h be the height of a certain cross-section of the tower. denoted as , where is the tower weight above the corresponding cross-section; g is the gravity coefficient.

[0091] Step S17: Adjust the overall load safety factor of the wind turbine based on the six-component gravity load of the blade, the six-component gravity load of the hub, the six-component gravity load of the tower top, and the six-component gravity load of the tower.

[0092] In this embodiment, the load safety factor of key components of the entire wind turbine is adjusted based on the six-component gravity loads of the blades, hub, tower top, and tower. Gravity load, as a deterministic load in a wind turbine, can be separately measured and considered in the limit state equations of the turbine based on probabilistic design, distinguishing it from the highly uncertain aerodynamic loads, thereby adjusting the load safety factor while ensuring target reliability. The premise for adjusting the load safety factor based on gravity load is that the gravity load must be an unfavorable load, meaning that the gravity load aggravates the total load effect, and the total load effect is detrimental to structural components. Based on the gravity load sequence of the blades, hub, tower top, and tower obtained in steps S12-S16, the safety factor of each load component can be adjusted as follows:

[0093] γ f =1.1+0.25ξ 2 ;

[0094]

[0095] Among them, F gravity The blades, hub, tower top, and tower frame are any component of the six-component gravity load, F k Let be any component of the corresponding six-component total load. Therefore, the component load timing with the adjusted safety factor is ζF. k Based on this, the ultimate load of the components is statistically obtained, enabling component load verification and overall cost reduction design.

[0096] In this embodiment, the process for adjusting the overall load safety factor of the wind turbine is as follows: Figure 2 As shown, (1) obtain the structural parameters and state parameters of the wind turbine; (2) calculate the six-component gravity load of the blade in the tower base coordinate system based on the blade node coordinates in the state parameters, considering the nacelle motion, transmission chain tilt angle, wind turbine rotation, blade cone angle, and blade pitch, and convert the six-component gravity load of the blade from the tower base coordinate system to the blade root coordinate system through the tower base-blade root coordinate system transformation matrix to obtain the six-component gravity load of the blade in the blade root coordinate system. Figure 3 Compare the time history curves of the blade root Mx load and its gravity load components in the blade root coordinate system; (3) Convert the blade six-component gravity load from the blade root coordinate system to the rotating hub coordinate system, calculate the hub gravity, convert the hub gravity from the tower bottom coordinate system to the rotating hub coordinate system, superimpose the blade six-component gravity load and the hub gravity, obtain the hub six-component gravity load in the rotating hub coordinate system through the blade root-wind turbine coordinate system transformation matrix, and then consider the wind turbine phase angle change to obtain the hub six-component gravity load in the fixed hub coordinate system; Figure 4For the comparison of the time history curves of the hub Fx load and its gravity load components under the rotating hub coordinate system; (4) Considering the center of gravity positions of the hub and the engine room, the six-component gravity load of the hub is converted from the fixed hub coordinate system to the tower top coordinate system, the gravity of the engine room at the tower top and the gravity moment generated are calculated, and the hub gravity load and the engine room gravity and gravity moment are superimposed to obtain the six-component gravity load of the tower top under the tower top coordinate system; Figure 5 Compare the time history curves of the My load and its gravity load components at the top of the tower in the tower top coordinate system; (5) Considering the motion of the engine room, based on the moment translation theorem, the six-component gravity load at the top of the tower is converted from the tower top coordinate system to the tower bottom coordinate system, and the gravity generated by the weight of the tower is superimposed to obtain the six-component gravity load of the tower at any section in the tower bottom coordinate system. Figure 6 Compare the time history curves of the Fz load at the base of the tower and its gravity load components in the coordinate system at the base of the tower; (6) Based on the gravity load time sequence of the blade, hub, tower top and tower obtained by the above calculation, adjust the load safety factor of the key components of the whole machine. The gravity load of each component obtained by the above calculation has strengthened the total load effect of the component, which is harmful to the component. Therefore, the gravity load is an unfavorable load. Determine the relationship between the gravity load component and the total load at each time step, calculate the gravity load ratio, obtain the adjusted safety factor and the load time sequence with the safety factor, and statistically obtain the component limit load to realize the component load verification and the whole machine cost reduction design.

[0097] In this embodiment, the structural parameters and state parameters of the wind turbine are obtained; the six-component gravity load of the blades in the tower base coordinate system is calculated based on the structural parameters and state parameters; the six-component gravity load of the blades is converted into the six-component gravity load of the blades in the blade root coordinate system using a tower base-blade root coordinate system transformation matrix; the six-component gravity load of the blades is converted from the blade root coordinate system to the rotating hub coordinate system; the hub gravity calculated based on the structural parameters is converted from the tower base coordinate system to the rotating hub coordinate system, and the results are superimposed to obtain the six-component gravity load of the hub in the rotating hub coordinate system; the six-component gravity load of the hub in the rotating hub coordinate system is then converted into the fixed hub coordinate system. The six-component gravity load of the hub is calculated; combining the six-component gravity load of the hub in the fixed hub coordinate system and the nacelle mass in the structural parameters, the six-component gravity load of the tower top in the tower top coordinate system is calculated using the wind turbine-tower top coordinate system transformation matrix; combining the six-component gravity load of the tower top and the tower mass in the structural parameters, the six-component gravity load of the tower at any section in the tower bottom coordinate system is calculated using the tower top-tower bottom coordinate system transformation matrix; the safety factor of the overall load of the wind turbine is adjusted based on the six-component gravity load of the blade, the six-component gravity load of the hub, the six-component gravity load of the tower top, and the six-component gravity load of the tower. This application calculates the six-component gravity load of the blade in the blade root coordinate system, the six-component gravity load of the hub in the fixed hub coordinate system, the six-component gravity load of the tower top in the tower top coordinate system, and the six-component gravity load of the tower in the tower bottom coordinate system. This enables the comprehensive calculation and solution of the gravity load of the entire wind turbine as a deterministic load. By utilizing the six-component gravity loads of the blade, hub, tower top, and tower bottom, the safety factor of the overall load of the wind turbine can be adjusted, thereby improving the structural design and optimization level of the wind turbine.

[0098] Figure 7 This is a schematic diagram of an electronic device provided in an embodiment of this application. The electronic device 20 may specifically include: at least one processor 21, at least one memory 22, a power supply 23, a communication interface 24, an input / output interface 25, and a communication bus 26. The memory 22 stores a computer program, which is loaded and executed by the processor 21 to implement the relevant steps in the wind turbine load safety factor adjustment method performed by the electronic device as disclosed in any of the foregoing embodiments.

[0099] In this embodiment, the power supply 23 is used to provide operating voltage for each hardware device on the electronic device 20; the communication interface 24 can create a data transmission channel between the electronic device 20 and external devices, and the communication protocol it follows can be any communication protocol applicable to the technical solution of this application, and is not specifically limited here; the input / output interface 25 is used to acquire external input data or output data to the outside world, and its specific interface type can be selected according to specific application needs, and is not specifically limited here.

[0100] In addition, the memory 22, as a carrier for resource storage, can be a read-only memory, random access memory, disk or optical disk, etc. The resources stored on it include operating system 221, computer program 222 and data 223, etc., and the storage method can be temporary storage or permanent storage.

[0101] The operating system 221 manages and controls the various hardware devices on the electronic device 20 and the computer program 222 to enable the processor 21 to perform calculations and processing on the data 223 in the memory 22. It can be Windows, Unix, Linux, etc. The computer program 222 includes, in addition to a computer program capable of performing the wind turbine load safety factor adjustment method executed by the electronic device 20 as disclosed in any of the foregoing embodiments, a computer program capable of performing other specific tasks. The data 223 can include data received by the wind turbine load safety factor adjustment device from external devices, as well as data collected by its own input / output interface 25.

[0102] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented directly by hardware, a software module executed by a processor, or a combination of both. The software module can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0103] Furthermore, this application also discloses a computer-readable storage medium storing a computer program. When the computer program is loaded and executed by a processor, it implements the steps of the wind turbine load safety factor adjustment method disclosed in any of the foregoing embodiments.

[0104] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0105] The above provides a detailed description of the method, equipment, and storage medium for adjusting the overall load safety factor of a wind turbine generator set provided by the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for adjusting the overall load safety factor of a wind turbine generator set, characterized in that, include: Obtain the structural and state parameters of the wind turbine generator; The six-component gravity load of the blade in the tower base coordinate system is calculated based on the structural parameters and the state parameters. The six-component gravity load of the blade is then converted into the six-component gravity load of the blade in the blade root coordinate system through the tower base-blade root coordinate system transformation matrix. The blade six-component gravity load is converted from the blade root coordinate system to the rotating hub coordinate system, and the hub gravity calculated based on the structural parameters is converted from the tower bottom coordinate system to the rotating hub coordinate system. The six-component gravity load of the hub in the rotating hub coordinate system is then superimposed to obtain the hub six-component gravity load. The six-component gravity load of the hub in the rotating hub coordinate system is converted into the six-component gravity load of the hub in the fixed hub coordinate system; Combining the six-component gravity load of the hub in the fixed hub coordinate system and the nacelle mass in the structural parameters, the six-component gravity load of the tower top in the tower top coordinate system is calculated using the wind turbine-tower top coordinate system transformation matrix. Combining the six-component gravity load at the top of the tower and the tower mass in the structural parameters, the six-component gravity load of the tower at any section in the tower base coordinate system is calculated using the tower top-to-tower base coordinate system transformation matrix; The safety factor of the overall load of the wind turbine is adjusted based on the six-component gravity load of the blade, the six-component gravity load of the hub, the six-component gravity load of the tower top, and the six-component gravity load of the tower. The method for adjusting the overall load safety factor of the wind turbine generator set further includes: if any of the six-component gravity loads of the blades, hub, tower top, and tower frame is an unfavorable load, then the overall load safety factor of the wind turbine generator set is adjusted, and the safety factor is adjusted as follows: ； ； in, For any component of the six-component gravity load of the blade, hub, tower top, and tower frame, For any component of the corresponding six-component total load.

2. The method for adjusting the overall load safety factor of a wind turbine generator according to claim 1, characterized in that, The acquisition of the structural parameters and state parameters of the wind turbine includes: The structural parameters of the wind turbine are obtained from the Bladed wind turbine model. The structural parameters include blade node position, blade mass distribution per unit length, blade cone angle, drive train tilt angle, hub mass, hub radius, hub center of gravity position, nacelle mass, nacelle center of gravity position, tower mass, and tower mass distribution. The state parameters of the wind turbine are obtained from the simulation results data of the Bladed wind turbine model; the state parameters include blade nodal coordinates, blade pitch angle, nacelle motion, and rotor azimuth angle.

3. The method for adjusting the overall load safety factor of a wind turbine generator according to claim 1, characterized in that, The six-component gravity load of the blade in the tower base coordinate system is: ； in, The total gravitational load on the blade segments from a certain node j to the blade tip is given by the blade. , , , , , Let be the six-component gravity load on the blade in the coordinate system at the base of the tower; n is the number of blade nodes; n-1 is the number of blade segments; and i is a blade segment from node j to the blade tip. ; This refers to the mass of a segment of the blade. , These are the coordinates of the centroid of a certain segment of the blade; , Let be the coordinates of blade node j; g is the gravity coefficient.

4. The method for adjusting the overall load safety factor of a wind turbine generator according to claim 3, characterized in that, The process of converting the six-component gravity load of the blade into the six-component gravity load of the blade in the blade root coordinate system using the tower-to-blade root coordinate system transformation matrix includes: The coordinate transformation matrix characterizing the inclination angle of the transmission chain and the coordinate transformation matrix characterizing the cone angle of the blade are constructed using the structural parameters. The coordinate transformation matrices representing the nacelle motion, the wind turbine rotation, and the blade pitch angle are constructed using the state parameters. The six-component gravity load of the blade in the tower base coordinate system is converted to the six-component gravity load of the blade in the blade root coordinate system using the coordinate transformation matrices described above; the six-component gravity load of the blade in the blade root coordinate system is: ； in, The coordinate transformation matrix characterizing cabin motion; The coordinate transformation matrix characterizing the inclination angle of the transmission chain; The coordinate transformation matrix characterizing the rotation of the wind turbine; The coordinate transformation matrix characterizing the blade cone angle; The coordinate transformation matrix representing the propeller pitch angle; The six-component gravity load of the blade is given in the blade root coordinate system.

5. The method for adjusting the overall load safety factor of a wind turbine generator according to claim 1, characterized in that, The process involves converting the six-component gravity load of the blade from the blade root coordinate system to the rotating hub coordinate system, converting the hub gravity calculated based on structural parameters from the tower base coordinate system to the rotating hub coordinate system, and superimposing them to obtain the six-component gravity load of the hub in the rotating hub coordinate system. Converting the six-component gravity load of the wheel hub in the rotating wheel hub coordinate system to the six-component gravity load of the wheel hub in the fixed wheel hub coordinate system includes: Based on the moment translation theorem, the six-component gravity load of the blade is transformed from the blade root coordinate system to the rotating hub coordinate system; The wheel hub weight is calculated based on the wheel hub mass, wheel hub radius, and wheel hub center of gravity position in the structural parameters, and the wheel hub weight is converted from the tower base coordinate system to the rotating wheel hub coordinate system; The six-component gravity load of the blade and the gravity of the hub are superimposed in the rotating hub coordinate system, and the six-component gravity load of the hub in the rotating hub coordinate system is calculated using the blade root-wind turbine coordinate system transformation matrix; the six-component gravity load of the hub in the rotating hub coordinate system is: ； in, , , , , , The six-component gravity load of the hub is defined in the rotating hub coordinate system. , , , , , The blade six-component gravity load is given in the rotating hub coordinate system. , , , , , The blade six-component gravity load is given in the rotating hub coordinate system. , , , , , The blade six-component gravity load is given in the rotating hub coordinate system. , , The gravitational load generated by the hub mass in the rotating hub coordinate system; The six-component gravity load of the wheel hub in the fixed hub coordinate system is: ； in, , , , , , The six-component gravity load of the wheel hub is defined in a fixed wheel hub coordinate system. This is the azimuth angle of the wind turbine.

6. The method for adjusting the overall load safety factor of a wind turbine generator according to claim 1, characterized in that, Combining the six-component gravity load of the hub in the fixed hub coordinate system and the nacelle mass in the structural parameters, the six-component gravity load of the tower top in the tower top coordinate system is calculated using the wind turbine-tower top coordinate system transformation matrix, including: Based on the moment translation theorem, the six-component gravity load of the hub is transformed from the fixed hub coordinate system to the tower top coordinate system; The nacelle mass in the structural parameters is transformed from the base coordinate system to the top coordinate system, and the gravitational moment generated by the nacelle mass at the top of the tower is calculated. The six-component gravity load of the hub, the nacelle mass, and the gravitational moment are superimposed in the tower top coordinate system, and the six-component gravity load of the tower top in the tower top coordinate system is calculated using the wind turbine-tower top coordinate system transformation matrix: The six-component gravity load of the tower top in the tower top coordinate system is: ； in, , , , , , The six-component gravity load at the top of the tower is defined in the tower top coordinate system. , , , , , The six-component gravity load of the wheel hub is given in the coordinate system at the top of the tower. For cabin weight; , For cabin roll angle and pitch angle; , denoted by , where is the longitudinal and lateral position of the cabin's center of gravity; g is the gravity coefficient.

7. The method for adjusting the overall load safety factor of a wind turbine generator according to claim 1, characterized in that, The calculation of the six-component gravity load of the tower at any cross-section in the tower base coordinate system, by combining the six-component gravity load at the tower top and the tower mass in the structural parameters and using the tower top-to-tower base coordinate system transformation matrix, includes: Based on the moment translation theorem, the six-component gravity load at the top of the tower is transformed from the top coordinate system to the bottom coordinate system. The tower mass is superimposed on the structural parameters, and the six-component gravity load of the tower at any cross-section in the tower base coordinate system is calculated using the tower top-to-tower coordinate system transformation matrix; the six-component gravity load of the tower at any cross-section in the tower base coordinate system is: ； in, , , , , , Let H be the six-component gravity load of the tower at any cross-section in the tower base coordinate system; H be the total height of the tower; and h be the height of a certain cross-section of the tower. The weight of the tower above the corresponding cross-section; g is the gravity coefficient; , , , , , The six-component gravity load at the top of the tower is defined in the tower top coordinate system. This refers to the cabin pitch angle.

8. An electronic device, characterized in that, include: Memory, used to store computer programs; A processor is configured to execute the computer program to implement the wind turbine load safety factor adjustment method as described in any one of claims 1 to 7.

9. A computer-readable storage medium, characterized in that, Used to store computer programs; wherein, when the computer programs are executed by a processor, they implement the wind turbine load safety factor adjustment method as described in any one of claims 1 to 7.

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