Self-adaptive rotating speed boundary setting method and system for suppressing vibration of high-frequency mixed tower

Abstract

The invention discloses a self-adaptive rotating speed boundary setting method for inhibiting high-frequency mixed tower vibration, which comprises the following steps of: setting mixed tower basic control parameters of a wind turbine generator according to a tower resonance area control schematic diagram, correcting the mixed tower basic control parameters to obtain mixed tower correction control parameters, and setting the mixed tower correction control parameters to be used as a wind turbine generator; tower vibration energy monitoring data in a preset rotating speed interval are obtained and analyzed, a rotating speed boundary threshold value in the mixed tower correction control parameters is adaptively adjusted according to an analysis result, real-time tower vibration energy monitoring data are obtained, whether the monitoring state of vibration energy is abnormal or not is judged, and if the monitoring state is abnormal, the tower vibration energy is monitored. And if yes, adaptively adjusting the target rotating speed boundary according to the adjusted rotating speed boundary threshold. The vibration frequency of the mixed tower can be effectively reduced, so that the operation stability of the unit is ensured, the service life of the unit is prevented from being influenced due to the fact that the unit is in a large-vibration state for a long time, and power generation benefits of a mixed tower wind field are ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind power generation, and in particular relates to an adaptive rotation speed boundary setting method and system for suppressing high-frequency mixed tower vibration. Background Art

[0002] With the increasing development of wind power technology and the increasing cost pressure, the cost reduction of wind turbines has become a focus of great concern for major wind power manufacturers. With the large-scale wind turbines and the increasingly severe wind resources, high towers have gradually become a favored design in the wind power field. Higher towers can help wind turbines obtain a larger annual average wind speed, thereby improving the power generation efficiency of wind farms. However, the high cost of traditional steel towers runs counter to the goal of the main manufacturers to reduce costs. At this time, the low cost and reliability of hybrid towers are the only choice to replace high steel towers. As a result, major manufacturers began to focus on promoting hybrid tower design. Wind turbines with hybrid towers have gradually become the main market players. Of course, the technical problems brought by hybrid towers have also been exposed. Since the early hybrid tower wind turbines are still in the initial stage, the standards for designing and manufacturing hybrid towers have not yet been perfected. Compared with steel towers, they have uncertainty in design parameters, imperfect simulation and irregular manufacturing of hybrid towers, resulting in the control parameters of wind turbines often not matching the actual operation conditions on site. The wind turbines on site vibrate frequently, which seriously affects the power generation efficiency and life of the wind farm. Based on the above reasons, the vibration treatment of the mixing tower becomes particularly important, and it is urgent to improve the control scheme to improve the vibration problem of the mixing tower. Summary of the invention

[0003] To solve the above problems, the present invention provides an adaptive speed boundary setting method and system for suppressing high-frequency mixed-tower vibrations, so as to solve the uncertainty of current mixed-tower wind turbine design parameters, imperfect simulation and non-standard mixed-tower manufacturing, which result in the control parameters of wind turbines often not matching the actual operating conditions on site, and the frequent vibrations of wind turbines on site, seriously affecting the power generation efficiency of the wind farm and the life of the unit.

[0004] An adaptive speed boundary setting method for suppressing high-frequency mixed tower vibration, comprising:

[0005] Set the control parameters of the wind turbine's mixed tower foundation according to the tower resonance zone control principle diagram;

[0006] Correcting the basic control parameters of the mixing tower to obtain corrected control parameters of the mixing tower;

[0007] Acquire and analyze the tower vibration energy monitoring data in a preset speed range, and adaptively adjust the speed boundary threshold in the mixed tower correction control parameter according to the analysis results;

[0008] Real-time tower vibration energy monitoring data is obtained and it is determined whether the monitoring status of the vibration energy is abnormal. If the monitoring status is abnormal, the target speed boundary is adaptively adjusted according to the adjusted speed boundary threshold.

[0009] According to a specific embodiment of the present invention, the basic control parameters of the mixing tower include:

[0010] The first-order resonance frequency of the tower is f T and speed boundary parameters, where the speed boundary parameters include the first-order resonance speed of the tower ω R , upper speed limit ω H , speed lower boundary ω L , torque upper boundary T H and the torque lower boundary T L .

[0011] According to a specific embodiment of the present invention, setting the control parameters of the mixed tower foundation of the wind turbine generator according to the tower resonance zone control principle diagram includes:

[0012] According to the tower resonance zone control principle diagram, the first-order resonance frequency f of the tower is set T and gearbox ratio G;

[0013] Based on the first-order resonance frequency f of the tower T Calculate the first-order resonance speed ω of the tower using the gearbox transmission ratio G R , and its calculation formula is:

[0014] ω R =f T *20*G

[0015] Based on the first-order resonance speed ω of the tower R Set the speed isolation zone boundary ratio B ratio , and according to the first-order resonance speed of the tower ω R and the speed isolation zone boundary ratio B ratio Calculate the upper speed limit ω H and the lower speed limit ω L , and its calculation formula is:

[0016]

[0017] According to the equal power design principle of the tower resonance speed isolation zone, the optimal gain parameter k is set opt , and based on the optimal gain parameter k opt Calculate the torque upper limit T H and the torque lower boundary T L , and its calculation formula is:

[0018]

[0019] According to a specific embodiment of the present invention, the basic control parameters of the mixing tower are corrected to obtain the corrected control parameters of the mixing tower, including:

[0020] Obtain actual operating vibration data of wind turbines;

[0021] The actual first-order resonance frequency f of the tower is extracted from the actual operation vibration data using Fourier transform. site ;

[0022] Based on the actual first-order resonance frequency f of the tower site The control parameters of the mixed tower foundation are corrected to obtain the corrected control parameters of the mixed tower, including the correction of the first-order resonance speed of the tower frame ω Rsite , correct the upper speed limit ω Hsite , correct the lower limit of the speed ω Lsite , correction torque upper boundary T Hsite and the correction torque lower boundary T Lsite .

[0023] According to a specific embodiment of the present invention, based on the actual first-order resonance frequency f of the tower site The basic control parameters of the mixing tower are corrected, and the corrected control parameters of the mixing tower include:

[0024] Based on the actual first-order resonance frequency f of the tower site and the gearbox transmission ratio G to calculate the corrected tower first-order resonance speed ω Rsite , and its calculation formula is:

[0025] ω Rsite =f site *20*G

[0026] Based on the correction of the first-order resonance speed ω of the tower Rsite Calculate the upper limit of the corrected speed ω Hsite and the lower limit of the corrected speed ω Lsite , and its calculation formula is:

[0027]

[0028] Based on the correction speed upper boundary ω Hsite and the lower limit of the corrected speed ω Lsite Calculate the correction torque upper limit T Hsite and the correction torque lower boundary T Lsite , and its calculation formula is:

[0029]

[0030] According to a specific embodiment of the present invention, obtaining and analyzing tower vibration energy monitoring data in a preset speed range, and adaptively adjusting the speed boundary threshold in the mixed tower correction control parameter according to the analysis result includes:

[0031] Obtain the tower vibration energy data in the preset speed range and filter it to obtain the tower vibration energy value Vib site ;

[0032] The tower vibration energy value Vib site With the preset vibration energy threshold Vib edge By comparison, if the tower vibration energy value Vib site Exceeding the preset vibration energy threshold Vib edge , then adjust the corresponding speed boundary threshold according to the torque boundary threshold until the vibration energy value falls within the preset vibration energy threshold Vib edge within the range of

[0033] The torque boundary threshold includes the correction torque upper boundary T Hsite and the correction torque lower boundary T Lsite , the speed boundary threshold includes the correction speed upper boundary ω Hsite and the lower limit of the corrected speed ω Lsite .

[0034] According to a specific embodiment of the present invention, obtaining real-time tower vibration energy monitoring data and determining whether the monitoring state of the vibration energy is abnormal, and if the monitoring state is abnormal, adaptively adjusting the target speed boundary according to the adjusted speed boundary threshold comprises:

[0035] Acquire real-time tower vibration energy monitoring data and filter it to obtain real-time tower vibration energy value;

[0036] The real-time tower vibration energy value is compared with the preset vibration energy threshold Vib edge If the real-time tower vibration energy value exceeds the preset vibration energy threshold Vib, edge , the monitoring state is abnormal, and the target speed boundary is adjusted according to the speed boundary threshold, and the adjusted target speed boundary falls within the range of the speed boundary threshold.

[0037] An adaptive speed boundary setting system for suppressing high-frequency mixing tower vibration, comprising:

[0038] A parameter setting module, used to set the control parameters of the mixed tower foundation of the wind turbine according to the tower resonance zone control principle diagram;

[0039] A parameter correction module is used to correct the basic control parameters of the mixing tower to obtain the corrected control parameters of the mixing tower;

[0040] The data analysis and adjustment module is used to obtain and analyze the tower vibration energy monitoring data in a preset speed range, and adaptively adjust the speed boundary threshold in the mixed tower correction control parameters according to the analysis results;

[0041] The data monitoring and adjustment module is used to obtain real-time tower vibration energy monitoring data and determine whether the monitoring status of the vibration energy is abnormal. If the monitoring status is abnormal, the target speed boundary is adaptively adjusted according to the adjusted speed boundary threshold.

[0042] According to a specific embodiment of the present invention, the data analysis and adjustment module further includes:

[0043] The first data acquisition module is used to obtain the tower vibration energy data in a preset speed range and filter it to obtain the tower vibration energy value Vib site ;

[0044] The first data comparison module is used to compare the tower vibration energy value Vib site With the preset vibration energy threshold Vib edge By comparison, if the tower vibration energy value Vib site Exceeding the preset vibration energy threshold Vib edge , then adjust the corresponding speed boundary threshold according to the torque boundary threshold until the vibration energy value falls within the preset vibration energy threshold Vib edge within the range of

[0045] The torque boundary threshold includes the correction torque upper boundary T Hsite and the correction torque lower boundary T Lsite , the speed boundary threshold includes the correction speed upper boundary ω Hsite and the lower limit of the corrected speed ω Lsite .

[0046] According to a specific embodiment of the present invention, the data monitoring and adjustment module further includes:

[0047] The second data acquisition module is used to acquire real-time tower vibration energy monitoring data and filter it to obtain real-time tower vibration energy value;

[0048] The second data comparison module is used to compare the real-time tower vibration energy value with the preset vibration energy threshold value Vib edge If the real-time tower vibration energy value exceeds the preset vibration energy threshold Vib, edge , the monitoring state is abnormal, and the target speed boundary is adjusted according to the speed boundary threshold, and the adjusted target speed boundary falls within the range of the speed boundary threshold.

[0049] Compared with the prior art, the present invention has the following advantages:

[0050] The present invention provides an adaptive speed boundary setting method and system for suppressing high-frequency mixed-tower vibrations. The method obtains field data to calibrate the set basic control parameters of the mixed-tower, combines the actual operation vibration data, and adaptively adjusts the speed boundary according to the vibration energy of the tower. Compared with the traditional fixed speed boundary, the frequency of mixed-tower vibration can be effectively reduced, thereby ensuring the stability of the unit operation, avoiding the unit being in a state of large vibration for a long time that affects the life of the unit, and ensuring the power generation efficiency of the mixed-tower wind farm. In addition, the present invention abandons the tradition of relying on design parameters and ensures the accuracy of the basic control parameters of on-site operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0052] Figure 1 The present invention is a flowchart of an adaptive speed boundary setting method for suppressing high-frequency mixing tower vibration provided in accordance with an embodiment of the present invention.

[0053] Figure 2 The present invention is a flow chart of a method for setting mixed tower control parameters of a wind turbine generator set according to an embodiment of the present invention.

[0054] Figure 3 It is a flow chart of a method for correcting control parameters of a mixing tower foundation provided according to an embodiment of the present invention.

[0055] Figure 4 The present invention is a flow chart of a method for performing parameter correction on a hybrid tower foundation control parameter based on an actual first-order resonance frequency of a tower frame according to an embodiment of the present invention.

[0056] Figure 5 It is a flow chart of a method for adaptively adjusting the speed boundary threshold in the mixed tower correction control parameters according to the tower vibration energy monitoring data analysis results in a preset speed range provided in accordance with an embodiment of the present invention.

[0057] Figure 6 It is a flow chart of a method for determining a vibration energy monitoring state provided according to an embodiment of the present invention.

[0058] Figure 7 It is a schematic diagram of tower resonance zone control according to an embodiment of the present invention.

[0059] Figure 8 It is a schematic diagram of adjusting the boundary of the rotation speed isolation zone according to an embodiment of the present invention.

[0060] Fig. 9 It is a flow chart of an overall solution for setting an adaptive speed boundary according to an embodiment of the present invention.

[0061] Fig.10 1 is a structural diagram of an adaptive speed boundary setting system for suppressing high-frequency mixing tower vibration provided according to an embodiment of the present invention.

[0062] Fig.11 It is a structural diagram of a data analysis and adjustment module provided according to an embodiment of the present invention.

[0063] Fig.12 It is a schematic diagram of the structure of a data monitoring and adjustment module provided according to an embodiment of the present invention.

[0064] Reference numerals:

[0065] 01- parameter setting module; 02- parameter correction module; 03- data analysis and adjustment module; 04- data monitoring and adjustment module;

[0066] 031-first data acquisition module; 032-first data comparison module;

[0067] 041 - second data acquisition module; 042 - second data comparison module. DETAILED DESCRIPTION

[0068] In order to make those skilled in the art understand the concept and thought of the present invention more clearly, the present invention is described in detail below in conjunction with specific embodiment.It should be understood that the embodiment provided herein is only a part of all embodiments that the present invention may have.Those skilled in the art, after reading the specification of the application, have the ability to make improvements, transformations, or replacements to part or the whole of the following embodiments, and these improvements, transformations, or replacements are also included in the scope of the present invention.

[0069] In this article, the terms "first", "second" and other similar words are not intended to imply any order, quantity and importance, but are only used to distinguish different elements. In this article, the terms "one", "an" and other similar words are not intended to indicate that there is only one thing, but to indicate that the relevant description is only for one of the things, and the thing may have one or more. In this article, the terms "comprise", "include" and other similar words are intended to indicate logical mutual relations, and cannot be regarded as indicating spatial structural relations. For example, "A includes B" is intended to indicate that B belongs to A logically, but does not mean that B is located inside A in space. In addition, the meanings of the terms "comprise", "include" and other similar words should be regarded as open, rather than closed. For example, "A includes B" is intended to indicate that B belongs to A, but B does not necessarily constitute the whole of A, and A may also include other elements such as C, D, and E.

[0070] In this document, the terms "embodiment", "this embodiment", "one embodiment", and "an embodiment" do not mean that the relevant description is only applicable to a specific embodiment, but rather that the description may also be applicable to one or more other embodiments. Those skilled in the art should understand that in this document, any description of a certain embodiment can be replaced, combined, or combined in other ways with the relevant descriptions in one or more other embodiments, and the new embodiments generated by the replacement, combination, or combination in other ways are easily conceivable by those skilled in the art and fall within the scope of protection of the present invention.

[0071] Example 1

[0072] Additional aspects and advantages of embodiments of the present invention will be described in part in the following description, and will become apparent from the following description, or will be learned through practice of embodiments of the present invention. Figure 1-Figure 9 The embodiment of the present invention provides an adaptive speed boundary setting method for suppressing high-frequency mixed tower vibration, comprising:

[0073] S1: Set the mixed tower foundation control parameters of the wind turbine according to the tower resonance zone control principle diagram, where the mixed tower foundation control parameters include the first-order resonance frequency f of the tower T and speed boundary parameters, where the speed boundary parameters include the first-order resonance speed of the tower ω R , the upper limit of speed ω H , speed lower boundary ω L , torque upper boundary T H and the torque lower boundary T L .

[0074] S2: Correct the basic control parameters of the mixing tower to obtain the corrected control parameters of the mixing tower.

[0075] S3: Obtain and analyze the tower vibration energy monitoring data in a preset speed range, and adaptively adjust the speed boundary threshold in the mixed tower correction control parameter according to the analysis result.

[0076] S4: Acquire real-time tower vibration energy monitoring data and determine whether the monitoring state of the vibration energy is abnormal. If the monitoring state is abnormal, adaptively adjust the target speed boundary according to the adjusted speed boundary threshold.

[0077] The present invention obtains field data to calibrate the set hybrid tower foundation control parameters, combines the actual operation vibration data, and adaptively adjusts the speed boundary according to the tower vibration energy. Compared with the traditional fixed speed boundary, the hybrid tower vibration frequency can be effectively reduced, thereby ensuring the stability of the unit operation, avoiding the unit being in a state of large vibration for a long time that affects the life of the unit, and ensuring the power generation efficiency of the hybrid tower wind farm.

[0078] Specifically, step S1 sets the control parameters of the wind turbine generator's mixed tower foundation according to the tower resonance zone control principle diagram, including:

[0079] S11: Set the first-order resonance frequency f of the tower according to the tower resonance zone control principle diagram T and gearbox ratio G.

[0080] The tower resonance zone schematic diagram usually involves the vibration characteristics of the tower. In the field of wind power generation, when the wind turbine is running, the tower may be subjected to various excitations such as wind force and impeller rotation, which may cause the tower to vibrate. In the design stage, it is necessary to determine the first-order resonant frequency of the tower through calculation and simulation. Figure 7 The tower resonance zone control schematic diagram shown sets the tower first-order resonance frequency f T and the gearbox transmission ratio G, which is used to calculate the subsequent first-order resonance speed of the tower. The first-order resonance frequency of the tower refers to the vibration frequency of the tower being the same as the excitation frequency when it is excited by the outside world, resulting in an increase in the vibration amplitude of the tower. The gearbox transmission ratio refers to the ratio of the speed of the input shaft to the output shaft, which is used to calculate the output speed of the gear transmission and the increase or decrease of the torque.

[0081] S12: Based on the first-order resonance frequency f of the tower T Calculate the first-order resonance speed ω of the tower using the gearbox transmission ratio G R , and its calculation formula is:

[0082] ω R =f T 20G (1)

[0083] S13: Based on the first-order resonance speed of the tower ω R Set the speed isolation zone boundary ratio B ratio , and according to the first-order resonance speed of the tower ω R and the speed isolation zone boundary ratio B ratio Calculate the upper speed limit ω H and the lower speed limit ω L , and its calculation formula is:

[0084]

[0085] S14: Set the optimal gain parameter k according to the equal power design principle of the tower resonance speed isolation zone opt , and based on the optimal gain parameter k opt Calculate the torque upper limit T H and the torque lower boundary T L , and its calculation formula is:

[0086]

[0087] After the calculation of the basic control parameters of the mixing tower is completed, the embodiment of the present invention can enter the on-site debugging stage.

[0088] Specifically, step S2 corrects the basic control parameters of the mixing tower, and obtains the corrected control parameters of the mixing tower, including:

[0089] S21: Acquire actual operation vibration data of the wind turbine.

[0090] The embodiment of the present invention collects actual operation vibration data of the wind turbine set through an on-site vibration sensor.

[0091] S22: Use Fourier transform to extract the actual tower first-order resonance frequency f from the actual operation vibration data site .

[0092] S23: Based on the actual tower first-order resonance frequency f site The control parameters of the mixed tower foundation are corrected to obtain the corrected control parameters of the mixed tower, including the correction of the first-order resonance speed of the tower frame ω Rsite , correct the upper speed limit ω Hsite , correct the lower limit of the speed ω Lsite , correction torque upper boundary T Hsite and the correction torque lower boundary T Lsite , specifically including:

[0093] S231: Based on the actual tower first-order resonance frequency f site and the gearbox transmission ratio G to calculate the corrected tower first-order resonance speed ω Rsite , and its calculation formula is:

[0094] ω Rsite =f site *20*G (4)

[0095] S232: Based on the correction of the first-order resonance speed of the tower ω Rsite Calculate the upper limit of the corrected speed ω Hsite and the lower limit of the corrected speed ω Lsite , and its calculation formula is:

[0096]

[0097] S233: Based on the correction speed upper limit ω Hsite and the lower limit of the corrected speed ω Lsite Calculate the upper limit of the correction torque T Hsite and the correction torque lower boundary T Lsite , and its calculation formula is:

[0098]

[0099] The embodiment of the present invention corrects the basic control parameters of the mixed tower to ensure that the current control parameters are compatible with the actual unit, thereby achieving normal monitoring of the tower vibration energy target. By correcting the basic control parameters of the mixed tower in combination with field data, the traditional practice of relying on design parameters for parameter setting is abandoned, and the accuracy of the basic control parameters of field operation is ensured.

[0100] Specifically, step S3 acquires and analyzes the tower vibration energy monitoring data in a preset speed range, and adaptively adjusts the speed boundary threshold in the mixed tower correction control parameter according to the analysis result, including:

[0101] S31: Obtain the tower vibration energy data in the preset speed range and filter it to obtain the tower vibration energy value Vib site .

[0102] S32: The tower vibration energy value Vib site With the preset vibration energy threshold Vib edge By comparison, if the tower vibration energy value Vib site Exceeding the preset vibration energy threshold Vib edge , then adjust the corresponding speed boundary threshold according to the torque boundary threshold until the vibration energy value falls within the preset vibration energy threshold Vib edge In the range of , the torque boundary threshold includes the correction torque upper boundary T Hsite and the correction torque lower boundary T Lsite , the speed boundary threshold includes the correction speed upper boundary ω Hsite and the lower limit of the corrected speed ω Lsite .

[0103] During the operation of a wind turbine, due to the limitations of physical laws and design parameters, its speed has an upper and lower limit, namely the speed boundary, which is usually determined by factors such as the design, material strength, safety and efficiency of the wind turbine. The speed boundary has a certain impact on the vibration energy of the tower: for example, when the wind turbine is running at a high speed, the vibration of the tower may be aggravated due to the centrifugal force. When the wind turbine is running, the vibration energy of the tower may affect the stability and safety of the unit. If the vibration energy is too large, it may cause fatigue damage to the tower structure and may even cause structural damage. Therefore, in order to ensure the stability and safety of the tower, when designing the wind turbine, it is necessary to consider the impact of the speed boundary on the vibration energy of the tower, and adjust the speed boundary of the wind turbine according to the vibration energy of the tower. In the embodiment of the present invention, the parameters designed by the tower resonance zone control principle have been adapted to the actual unit, and the vibration energy data of the tower in a preset speed range is collected by a vibration sensor, and the filtered vibration energy value Vib is obtained by filtering for a period of time. site, the vibration energy value Vib site With the preset vibration energy threshold Vib edge For comparison, Figure 8 As shown, if the vibration energy value Vib site Exceeds the preset vibration energy threshold Vib edge , then adjust the corresponding speed boundary threshold according to the preset torque boundary threshold. If the vibration energy value Vib site At the preset vibration energy threshold Vib edge If the value is within the range, the unit can operate normally without adaptive adjustment.

[0104] Specifically, step S4 acquires real-time tower vibration energy monitoring data and determines whether the monitoring state of the vibration energy is abnormal. If the monitoring state is abnormal, adaptively adjusting the target speed boundary according to the adjusted speed boundary threshold includes:

[0105] S41: Acquire real-time tower vibration energy monitoring data and perform filtering to obtain real-time tower vibration energy value.

[0106] S42: Compare the real-time tower vibration energy value with the preset vibration energy threshold value Vib edge If the real-time tower vibration energy value exceeds the preset vibration energy threshold Vib, edge , the monitoring state is abnormal, and the target speed boundary is adjusted according to the speed boundary threshold, and the adjusted target speed boundary falls within the range of the speed boundary threshold.

[0107] In wind power generation, the hybrid tower will generate vibration energy when it is affected by wind. During the vibration process, the kinetic energy and potential energy of the tower are converted into each other to form vibration energy. In the embodiment of the present invention, the real-time tower vibration energy monitoring data is obtained by continuously monitoring the tower vibration energy in real time, and the real-time tower vibration energy value is obtained by filtering. When the vibration energy is continuously in an abnormal state, the target speed boundary is adjusted to the preset boundary threshold ω according to the speed boundary threshold. Hedge Or Ledge The present invention combines actual operation vibration data to adaptively adjust the speed boundary, which is different from the traditional fixed speed boundary and can effectively suppress high-frequency mixed tower vibration.

[0108] Example 2

[0109] Based on the above method, the embodiment of the present invention also provides an adaptive speed boundary setting system for suppressing high-frequency mixing tower vibration, such as Figure 10-12 As shown, including:

[0110] The parameter setting module 01 is used to set the control parameters of the mixed tower foundation of the wind turbine according to the tower resonance zone control principle diagram.

[0111] The parameter correction module 02 is used to correct the basic control parameters of the mixing tower to obtain the corrected control parameters of the mixing tower.

[0112] The data analysis and adjustment module 03 is used to obtain and analyze the tower vibration energy monitoring data in a preset speed range, and adaptively adjust the speed boundary threshold in the mixed tower correction control parameter according to the analysis result.

[0113] The data monitoring and adjustment module 04 is used to obtain real-time tower vibration energy monitoring data and determine whether the monitoring status of the vibration energy is abnormal. If the monitoring status is abnormal, the target speed boundary is adaptively adjusted according to the adjusted speed boundary threshold.

[0114] The present invention first sets the mixed tower foundation control parameters of the wind turbine through the parameter setting module 01, then corrects the set mixed tower foundation control parameters through the parameter correction module 02, and then analyzes the actual operation vibration data through the data analysis and adjustment module 03, and adaptively adjusts the speed boundary threshold according to the tower vibration energy, and finally obtains and analyzes the real-time tower vibration energy monitoring data through the data monitoring and adjustment module 04, and adaptively adjusts the target speed boundary according to the monitoring status. Compared with the traditional fixed speed boundary, the present invention can effectively reduce the frequency of mixed tower vibration, thereby ensuring the stability of the unit operation, avoiding the unit being in a state of large vibration for a long time to affect the unit life, and ensuring the power generation efficiency of the mixed tower wind farm.

[0115] Specifically, the data analysis and adjustment module 03 also includes:

[0116] The first data acquisition module 031 is used to acquire the tower vibration energy data in a preset speed range and filter it to obtain the tower vibration energy value Vib site .

[0117] The first data comparison module 032 is used to compare the tower vibration energy value Vib site With the preset vibration energy threshold Vib edge By comparison, if the tower vibration energy value Vib site Exceeding the preset vibration energy threshold Vib edge , then adjust the corresponding speed boundary threshold according to the torque boundary threshold until the vibration energy value falls within the preset vibration energy threshold Vib edge within the range of

[0118] The torque boundary threshold includes the correction torque upper boundary T Hsite and the correction torque lower boundary T Lsite , the speed boundary threshold includes the correction speed upper boundary ω Hsite and the lower limit of the corrected speed ω Lsite .

[0119] In the embodiment of the present invention, the parameters designed by the tower resonance zone control principle have been adapted to the actual unit, and the tower vibration energy data in the preset speed range is collected by the first data acquisition module 031, and the filtered vibration energy value Vib is obtained by filtering for a period of time. site , the vibration energy value Vib is converted into site With the preset vibration energy threshold Vib edge For comparison, Figure 8 As shown, if the vibration energy value Vib site Exceeds the preset vibration energy threshold Vib edge , then adjust the corresponding speed boundary threshold according to the preset torque boundary threshold. If the vibration energy value Vib site At the preset vibration energy threshold Vib edge If the value is within the range, the unit can operate normally without adaptive adjustment.

[0120] Specifically, the data monitoring and adjustment module 04 also includes:

[0121] The second data acquisition module 041 is used to acquire real-time tower vibration energy monitoring data and filter it to obtain real-time tower vibration energy value.

[0122] The second data comparison module 042 is used to compare the real-time tower vibration energy value with the preset vibration energy threshold value Vib edge If the real-time tower vibration energy value exceeds the preset vibration energy threshold Vib, edge , the monitoring state is abnormal, and the target speed boundary is adjusted according to the speed boundary threshold, and the adjusted target speed boundary falls within the range of the speed boundary threshold.

[0123] In the embodiment of the present invention, the tower vibration energy is continuously monitored in real time by the second data acquisition module 041, thereby obtaining real-time tower vibration energy monitoring data, and obtaining the real-time tower vibration energy value through filtering. The real-time tower vibration energy value is compared with the preset vibration energy threshold value Vib by the second data comparison module 042. edge For comparison, when the vibration energy continues to be in an abnormal state, the target speed boundary is adjusted to the preset boundary threshold ω according to the speed boundary threshold Hedge Or Ledge The present invention combines actual operation vibration data to adaptively adjust the speed boundary, which is different from the traditional fixed speed boundary and can effectively suppress high-frequency mixed tower vibration.

[0124] In summary, the adaptive speed boundary setting method for suppressing high-frequency mixing tower vibration described in the present invention has the following advantages:

[0125] The present invention provides an adaptive speed boundary setting method and system for suppressing high-frequency mixed-tower vibrations. The method obtains field data to calibrate the set basic control parameters of the mixed-tower, combines the actual operation vibration data, and adaptively adjusts the speed boundary according to the vibration energy of the tower. Compared with the traditional fixed speed boundary, the frequency of mixed-tower vibration can be effectively reduced, thereby ensuring the stability of the unit operation, avoiding the unit being in a state of large vibration for a long time that affects the life of the unit, and ensuring the power generation efficiency of the mixed-tower wind farm. In addition, the present invention abandons the tradition of relying on design parameters and ensures the accuracy of the basic control parameters of on-site operation.

[0126] The above describes in detail the concepts, principles and ideas of the present invention in conjunction with specific implementation methods (including embodiments and examples). Those skilled in the art should understand that the implementation methods of the present invention are not limited to the forms given above. After reading this application document, those skilled in the art can make any possible improvements, substitutions and equivalent forms to the steps, methods, systems and components in the above implementation methods. These improvements, substitutions and equivalent forms should be deemed to fall within the scope of the present invention, and the protection scope of the present invention is subject only to the claims.

Claims

1. An adaptive speed boundary setting method for suppressing high-frequency mixing tower vibration, characterized in that: include: Set the control parameters of the wind turbine's mixed tower foundation according to the tower resonance zone control principle diagram; Correcting the mixing tower basic control parameters to obtain mixing tower correction control parameters; Acquire and analyze the tower vibration energy monitoring data in a preset speed range, and adaptively adjust the speed boundary threshold in the mixed tower correction control parameter according to the analysis result; Real-time tower vibration energy monitoring data is obtained and it is determined whether the monitoring status of the vibration energy is abnormal. If the monitoring status is abnormal, the target speed boundary is adaptively adjusted according to the adjusted speed boundary threshold.

2. The method for setting an adaptive speed boundary for suppressing high-frequency mixing tower vibration according to claim 1, characterized in that: The basic control parameters of the mixing tower include: The first-order resonance frequency of the tower is f T and speed boundary parameters, wherein the speed boundary parameters include the first-order resonance speed ω of the tower R , the upper limit of speed ω H , speed lower boundary ω L , torque upper boundary T H and the torque lower boundary T L .

3. The method for setting an adaptive speed boundary for suppressing high-frequency mixing tower vibration according to claim 2, characterized in that: The mixed tower foundation control parameters of the wind turbine generator set are set according to the tower resonance zone control principle diagram, including: According to the tower resonance zone control principle diagram, the first-order resonance frequency f of the tower is set T and gearbox ratio G; Based on the first-order resonance frequency f of the tower T and the gearbox transmission ratio G to calculate the first-order resonance speed ω of the tower R , and its calculation formula is: oh R =f T *20*G Based on the first-order resonance speed ω of the tower R Set the speed isolation zone boundary ratio B ratio , and according to the tower first-order resonance speed ω R and the speed isolation zone boundary ratio B ratio Calculate the upper speed limit ω H and the lower speed limit ω L , and its calculation formula is: According to the equal power design principle of the tower resonance speed isolation zone, the optimal gain parameter k is set opt , and based on the optimal gain parameter k opt Calculate the torque upper limit T H and the torque lower boundary T L , and its calculation formula is:

4. The method for setting an adaptive speed boundary for suppressing high-frequency mixing tower vibration according to claim 3, characterized in that: The correcting of the mixing tower basic control parameters to obtain the corrected mixing tower control parameters includes: Obtain actual operating vibration data of wind turbines; The actual first-order resonance frequency f of the tower is extracted from the actual operation vibration data by Fourier transform. site ; Based on the actual first-order resonance frequency f of the tower site The mixed tower foundation control parameters are corrected to obtain the mixed tower correction control parameters, including the correction of the tower frame first-order resonance speed ω Rsite , correct the upper speed limit ω Hsite , correct the lower limit of the speed ω Lsite , correction torque upper boundary T Hsite and the correction torque lower boundary T Lsite .

5. The method for setting an adaptive rotation speed boundary for suppressing high-frequency mixing tower vibration according to claim 4, characterized in that: Based on the actual first-order resonance frequency f of the tower site The mixing tower basic control parameters are corrected to obtain the mixing tower correction control parameters including: Based on the actual first-order resonance frequency f of the tower site and the gearbox transmission ratio G to calculate the corrected tower first-order resonance speed ω Rsite , and its calculation formula is: oh Rsite =f site *20*G Based on the correction tower first-order resonance speed ω Rsite Calculate the upper limit of the corrected speed ω Hsite and the lower limit of the corrected speed ω Lsite , and its calculation formula is: Based on the corrected speed upper boundary ω Hsite and the corrected speed lower boundary ω Lsite Calculate the upper limit of the correction torque T Hsite and the correction torque lower boundary T Lsite , and its calculation formula is:

6. The method for setting an adaptive rotation speed boundary for suppressing high-frequency mixing tower vibration according to claim 5, characterized in that: The acquiring and analyzing the tower vibration energy monitoring data in the preset speed range, and adaptively adjusting the speed boundary threshold in the mixed tower correction control parameter according to the analysis result comprises: Obtain the tower vibration energy data in the preset speed range and filter it to obtain the tower vibration energy value Vib site ; The tower vibration energy value Vib site With the preset vibration energy threshold Vib edge By comparison, if the tower vibration energy value Vib site Exceeding the preset vibration energy threshold Vib edge , then adjust the corresponding speed boundary threshold according to the torque boundary threshold until the vibration energy value falls within the preset vibration energy threshold Vib edge within the range of The torque boundary threshold includes the correction torque upper boundary T Hsite and the correction torque lower boundary T Lsite , the speed boundary threshold includes the correction speed upper boundary ω Hsite and the corrected speed lower boundary ω Lsite .

7. The method for setting an adaptive rotation speed boundary for suppressing high-frequency mixing tower vibration according to claim 6, characterized in that: The acquiring of real-time tower vibration energy monitoring data and determining whether the monitoring state of the vibration energy is abnormal, and if the monitoring state is abnormal, adaptively adjusting the target speed boundary according to the adjusted speed boundary threshold value comprises: Acquire real-time tower vibration energy monitoring data and filter it to obtain real-time tower vibration energy value; The real-time tower vibration energy value is compared with the preset vibration energy threshold value Vib edge If the real-time tower vibration energy value exceeds the preset vibration energy threshold value Vib edge , the monitoring state is abnormal, and the target speed boundary is adjusted according to the speed boundary threshold, and the adjusted target speed boundary falls within the range of the speed boundary threshold.

8. An adaptive speed boundary setting system for suppressing high-frequency mixing tower vibration, characterized in that: include: A parameter setting module, used to set the control parameters of the mixed tower foundation of the wind turbine according to the tower resonance zone control principle diagram; A parameter correction module, used to correct the mixing tower basic control parameters to obtain mixing tower correction control parameters; A data analysis and adjustment module, used to obtain and analyze the tower vibration energy monitoring data in a preset speed range, and adaptively adjust the speed boundary threshold in the mixed tower correction control parameter according to the analysis result; The data monitoring and adjustment module is used to obtain real-time tower vibration energy monitoring data and determine whether the monitoring status of the vibration energy is abnormal. If the monitoring status is abnormal, the target speed boundary is adaptively adjusted according to the adjusted speed boundary threshold.

9. The adaptive speed limit setting system for suppressing high-frequency mixing tower vibration according to claim 8, characterized in that: The data analysis and adjustment module also includes: The first data acquisition module is used to obtain the tower vibration energy data in a preset speed range and filter it to obtain the tower vibration energy value Vib site ; The first data comparison module is used to compare the tower vibration energy value Vib site With the preset vibration energy threshold Vib edge By comparison, if the tower vibration energy value Vib site Exceeding the preset vibration energy threshold Vib edge , then adjust the corresponding speed boundary threshold according to the torque boundary threshold until the vibration energy value falls within the preset vibration energy threshold Vib edge within the range of The torque boundary threshold includes the correction torque upper boundary T Hsite and the correction torque lower boundary T Lsite , the speed boundary threshold includes the correction speed upper boundary ω Hsite and the corrected speed lower boundary ω Lsite .

10. The adaptive speed limit setting system for suppressing high-frequency mixing tower vibration according to claim 8, characterized in that: The data monitoring and adjustment module also includes: The second data acquisition module is used to acquire real-time tower vibration energy monitoring data and filter it to obtain real-time tower vibration energy value; The second data comparison module is used to compare the real-time tower vibration energy value with the preset vibration energy threshold value Vib edge If the real-time tower vibration energy value exceeds the preset vibration energy threshold value Vib edge , the monitoring state is abnormal, and the target speed boundary is adjusted according to the speed boundary threshold, and the adjusted target speed boundary falls within the range of the speed boundary threshold.

Images