Adaptive rotational speed boundary setting method and system for suppressing high-frequency torsional vibrations

Abstract

The application discloses a kind of self-adapting rotational speed boundary setting methods of inhibiting high-frequency mixed tower vibration, method includes: according to tower resonance area control schematic diagram setting mixed tower foundation control parameter of wind turbine, mixed tower foundation control parameter is corrected, obtains mixed tower correction control parameter, obtains the tower vibration energy monitoring data of preset rotational speed interval and analysis, according to the result of analysis, rotational speed boundary threshold in mixed tower correction control parameter is adaptively adjusted, obtains real-time tower vibration energy monitoring data and judges whether the monitoring state of vibration energy is abnormal, if monitoring state is abnormal, then according to the rotational speed boundary threshold of adjusted target rotational speed boundary is adaptively adjusted.The application can effectively reduce the frequency of mixed tower vibration, so as to ensure the stability of unit operation, avoid the unit in the state of long-term vibration, affect the service life of unit, ensure the power generation benefit of mixed tower wind farm.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of wind power generation, and particularly relates to a self-adaptive rotating speed boundary setting method and system for inhibiting high-frequency tower-vibration. BACKGROUND

[0002] With the increasing development of wind power technology and cost pressure, the cost reduction of wind turbine has become the focus of major wind power manufacturers. With the large-scale of wind turbine and the increasingly severe wind resources, high tower gradually becomes the preferred design in the wind power field. Higher tower can help wind turbine to obtain greater average annual wind speed, thereby improving the power generation benefit of wind farm. However, the high cost of traditional steel tower is contrary to the goal of cost reduction of manufacturers, and the low cost and reliability of hybrid tower are the only choice to replace high steel tower. Therefore, major manufacturers have begun to promote hybrid tower design, and wind turbines with hybrid tower have gradually become the market mainstay. Of course, the technical problems brought by hybrid tower have also been exposed. Since the early hybrid wind turbine is still in the initial stage, the standard for designing and manufacturing hybrid tower is not perfect. Compared with steel tower, the hybrid tower has design parameter uncertainty, imperfect simulation and non-standard manufacturing, which leads to the mismatch between the control parameters of wind turbine and the actual operation condition, frequent vibration of wind turbine in the field, and serious impact on the power generation benefit of wind farm and the service life of wind turbine. Based on the above reasons, it is particularly important to improve the control scheme to improve the hybrid tower vibration problem. SUMMARY

[0003] To solve the above problems, the application provides a self-adaptive rotating speed boundary setting method and system for inhibiting high-frequency hybrid tower vibration, to solve the problem of mismatch between the control parameters of wind turbine and the actual operation condition, frequent vibration of wind turbine in the field, and serious impact on the power generation benefit of wind farm and the service life of wind turbine caused by the design parameter uncertainty, imperfect simulation and non-standard manufacturing of current hybrid tower wind turbine.

[0004] A self-adaptive rotating speed boundary setting method for inhibiting high-frequency hybrid tower vibration, comprising:

[0005] setting the hybrid tower basic control parameters of wind turbine according to the tower resonance area control principle diagram;

[0006] correcting the hybrid tower basic control parameters to obtain hybrid tower corrected control parameters;

[0007] obtaining the tower vibration energy monitoring data of the preset rotating speed range and analyzing, and adaptively adjusting the rotating speed boundary threshold in the hybrid tower corrected control parameters according to the analysis result;

[0008] Real-time tower vibration energy monitoring data is acquired, and it is judged whether the monitoring state of the vibration energy is abnormal, if the monitoring state is abnormal, the target rotating speed boundary is adaptively adjusted according to the adjusted rotating speed boundary threshold.

[0009] According to an embodiment of the present application, the tower foundation control parameters include:

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

[0011] According to an embodiment of the present application, the tower foundation control parameters of the wind turbine are set according to the tower resonance region control schematic diagram, and the tower foundation control parameters include:

[0012] The first-order resonance frequency f of the tower T and the gearbox transmission ratio G are set according to the tower resonance region control schematic diagram;

[0013] The first-order resonance rotating speed ω of the tower R is calculated based on the first-order resonance frequency f of the tower T and the gearbox transmission ratio G, and the calculation formula is:

[0014] ω R = f T *20*G

[0015] The rotating speed isolation region boundary ratio B ratio is set based on the first-order resonance rotating speed ω of the tower R , and the upper rotating speed boundary ω H and the lower rotating speed boundary ω L are calculated according to the first-order resonance rotating speed ω of the tower R and the rotating speed isolation region boundary ratio B ratio , and the calculation formula is:

[0016]

[0017] The optimal gain parameter k opt is set according to the tower resonance rotating speed isolation region equal power design principle, and the upper torque boundary T H and the lower torque boundary T L are calculated based on the optimal gain parameter k opt , and the calculation formula is:

[0018]

[0019] According to an embodiment of the present application, the control parameters of the mixed tower foundation are corrected to obtain mixed tower correction control parameters, including:

[0020] The actual operation vibration data of the wind turbine generator is obtained.

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

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

[0023] According to an embodiment of the present application, the actual tower first-order resonance frequency f site is used to correct the control parameters of the mixed tower foundation to obtain mixed tower correction control parameters, including:

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

[0025] ω Rsite = f site *20*G

[0026] The corrected tower first-order resonance speed ω Rsite is used to calculate the corrected upper speed limit ω Hsite and the corrected lower speed limit ω Lsite , and the calculation formula is:

[0027]

[0028] The corrected upper speed limit ω Hsite and the corrected lower speed limit ω Lsite are used to calculate the corrected torque upper limit T Hsite and the corrected torque lower limit T Lsite , and the calculation formula is:

[0029]

[0030] According to an embodiment of the present application, the tower vibration energy monitoring data of the preset speed range is obtained and analyzed, and the speed boundary threshold in the mixed tower correction control parameters is adaptively adjusted according to the analysis result.

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

[0032] compare the tower vibration energy value Vib site with a preset vibration energy threshold Vib edge , and if the tower vibration energy value Vib site exceeds the preset vibration energy threshold Vib edge , adjust the corresponding speed boundary threshold according to the torque boundary threshold until the vibration energy value falls within the range of the preset vibration energy threshold Vib edge ,

[0033] wherein the torque boundary threshold includes a corrected torque upper boundary T Hsite and a corrected torque lower boundary T Lsite , and the speed boundary threshold includes a corrected speed upper boundary ω Hsite and a corrected speed lower boundary ω Lsite .

[0034] According to an embodiment of the present application, real-time tower vibration energy monitoring data is obtained and it is determined whether the monitoring state of the vibration energy is abnormal, and if the monitoring state is abnormal, the target speed boundary is adaptively adjusted according to the adjusted speed boundary threshold, including:

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

[0036] compare the real-time tower vibration energy value with a preset vibration energy threshold Vib edge , and 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 tower vibration, comprising:

[0038] a parameter setting module configured to set a tower foundation control parameter of a wind turbine according to a tower resonance control principle diagram;

[0039] a parameter correction module configured to correct the tower foundation control parameter to obtain a tower correction control parameter;

[0040] a data analysis and adjustment module configured to obtain tower vibration energy monitoring data in a preset speed range and analyze the data, and adaptively adjust a speed boundary threshold in the tower correction control parameter according to an analysis result;

[0041] The data monitoring and adjusting module is used for acquiring real-time tower vibration energy monitoring data and judging whether the monitoring state of the vibration energy is abnormal, and if the monitoring state is abnormal, the target rotating speed boundary is adaptively adjusted according to the adjusted rotating speed boundary threshold.

[0042] According to an embodiment of the present application, the data analysis and adjusting module further comprises:

[0043] The first data acquisition module is used for acquiring tower vibration energy data in a preset rotating speed interval and performing filtering to obtain a tower vibration energy value Vib site ;

[0044] The first data comparison module is used for comparing the tower vibration energy value Vib site with a preset vibration energy threshold Vib edge , and if the tower vibration energy value Vib site exceeds the preset vibration energy threshold Vib edge , the corresponding rotating speed boundary threshold is adjusted according to the torque boundary threshold until the vibration energy value falls within the range of the preset vibration energy threshold Vib edge .

[0045] The torque boundary threshold comprises a corrected torque upper boundary T Hsite and a corrected torque lower boundary T Lsite , and the rotating speed boundary threshold comprises a corrected rotating speed upper boundary ω Hsite and a corrected rotating speed lower boundary ω Lsite .

[0046] According to an embodiment of the present application, the data monitoring and adjusting module further comprises:

[0047] The second data acquisition module is used for acquiring real-time tower vibration energy monitoring data and performing filtering to obtain a real-time tower vibration energy value;

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

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

[0050] The application provides a self-adaptive rotating speed boundary setting method and system for inhibiting high-frequency mixed-tower vibration. BRIEF DESCRIPTION OF DRAWINGS

[0051] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0052] Figure 1 FIG. 1 is a flowchart of a self-adaptive rotating speed boundary setting method for inhibiting high-frequency mixed-tower vibration according to an embodiment of the present application.

[0053] Figure 2 FIG. 2 is a flowchart of a mixed-tower control parameter setting method of a wind turbine generator set according to an embodiment of the present application.

[0054] Figure 3 FIG. 3 is a flowchart of a method for correcting mixed-tower basic control parameters according to an embodiment of the present application.

[0055] Figure 4 FIG. 4 is a flowchart of a method for correcting mixed-tower basic control parameters based on actual tower first-order resonance frequency according to an embodiment of the present application.

[0056] Figure 5 FIG. 5 is a flowchart of a method for self-adaptive adjustment of rotating speed boundary threshold in mixed-tower correction control parameters according to a preset rotating speed interval tower vibration energy monitoring data analysis result according to an embodiment of the present application.

[0057] Figure 6 FIG. 6 is a flowchart of a method for judging vibration energy monitoring state according to an embodiment of the present application.

[0058] Figure 7 FIG. 7 is a tower resonance zone control principle diagram according to an embodiment of the present application.

[0059] Figure 8 FIG. 8 is a rotating speed isolation zone boundary adjustment schematic diagram according to an embodiment of the present application.

[0060] Figure 9 is a self-adaptive rotating speed boundary setting overall scheme flow chart according to an embodiment of the present application.

[0061] Figure 10 is a self-adaptive rotating speed boundary setting system structure diagram for suppressing high frequency mist tower vibration according to an embodiment of the present application.

[0062] Figure 11 is a data analysis and adjustment module structure diagram according to an embodiment of the present application.

[0063] Figure 12 is a data monitoring and adjustment module structure diagram according to an embodiment of the present application.

[0064] Reference signs:

[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 the concept and thought of the present application more clear to the person skilled in the art, the present application is described in detail below in combination with specific embodiments. It should be understood that the embodiments given herein are only a part of all the embodiments that the present application can have. The person skilled in the art can make improvements, modifications or replacements to some or all of the following embodiments after reading the description of the present application, and these improvements, modifications or replacements are also included in the scope of protection of the present application.

[0069] In the present text, the terms "first", "second" and other similar words are not intended to imply any order, number and importance, but are only used to distinguish different elements. In the present text, the terms "one", "a" and other similar words are not intended to mean that there is only one thing, but that the description is only directed to one of the things, and the things can have one or more. In the present text, the terms "contain", "include" and other similar words are intended to mean logical interrelation, and cannot be regarded as indicating spatial structural relation. For example, "A includes B" is intended to mean that B logically belongs to A, and does not mean that B is located inside A in space. In addition, the meaning of the terms "contain", "include" and other similar words should be regarded as open, rather than closed. For example, "A includes B" is intended to mean that B belongs to A, but B does not necessarily constitute all of A, and A can also include C, D, E and other elements.

[0070] In this document, the terms "an embodiment", "one embodiment", "an implementation", "one implementation” and the like do not refer to the same implementation or to one particular implementation, but rather to one or more implementations. As such, the terms "an embodiment”, "one embodiment”, "an implementation”, "one implementation” and the like, throughout this document, mean "one or more implementations". Thus, the terms "an embodiment”, "one embodiment”, "an implementation”, "one implementation” and the like, throughout this document, mean "one or more implementations". It will be apparent to one of ordinary skill in the art that any of the features described with respect to one embodiment can be combined with any of the features described with respect to one or more other embodiments. Such combinations are within the scope of the present application.

[0071] Embodiment 1

[0072] Additional aspects and advantages of implementations of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or can be learned by practice of the implementations of the application. The aspects and advantages of the implementations of the application will be realized and attained by means of the instrumentalities fully described in the description and claims that follow. Figures 1-9 The embodiments of the present application provide a self-adaptive rotating speed boundary setting method for inhibiting high-frequency tower-vibration, comprising:

[0073] S1: setting tower-vibration basic control parameters of a wind turbine according to a tower resonance region control diagram, wherein the tower-vibration basic control parameters comprise a tower first-order resonance frequency f T and a rotating speed boundary parameter, wherein the rotating speed boundary parameter comprises a tower first-order resonance rotating speed ω R , a rotating speed upper boundary ω H , a rotating speed lower boundary ω L , a torque upper boundary T H and a torque lower boundary T L .

[0074] S2: correcting the tower-vibration basic control parameters to obtain tower-vibration correction control parameters.

[0075] S3: obtaining tower-vibration energy monitoring data in a preset rotating speed region and analyzing, and self-adaptively adjusting the rotating speed boundary threshold in the tower-vibration correction control parameters according to the analysis result.

[0076] S4: obtaining real-time tower-vibration energy monitoring data and judging whether the monitoring state of the vibration energy is abnormal, and if the monitoring state is abnormal, self-adaptively adjusting the target rotating speed boundary according to the adjusted rotating speed boundary threshold.

[0077] The present application corrects the set tower-vibration basic control parameters by obtaining field data, combines actual operation vibration data, and self-adaptively adjusts the rotating speed boundary according to the tower-vibration energy, which can effectively reduce the tower-vibration frequency compared with the traditional fixed rotating speed boundary, 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 service life of the unit, and ensuring the power generation benefit of the tower-vibration wind field.

[0078] Specifically, step S1 sets the tower foundation control parameters of the wind turbine 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 the gear box transmission ratio G.

[0080] The tower resonance zone principle diagram generally 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, impeller rotation, etc., which may cause the tower to vibrate. In the design stage, the first-order resonance frequency of the tower needs to be determined through calculation and simulation. The embodiments of the present application set the first-order resonance frequency f Figure 7 of the tower according to the tower resonance zone control principle diagram shown in the figure T and the gear box transmission ratio G, which are used for subsequent calculation of the 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 the tower is subjected to external excitation, resulting in an increase in the vibration amplitude of the tower. The gear box transmission ratio refers to the ratio of the rotational speed of the input shaft to the rotational speed of the output shaft, which is used to calculate the output speed and the increase and decrease of the torque of the gear transmission.

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

[0082] ω T = f R 20G (1)

[0083] S13: Set the speed isolation zone boundary ratio B ratio based on the first-order resonance speed ω R of the tower and the speed isolation zone boundary ratio B ratio , and calculate the upper speed boundary ω H and the lower speed boundary ω L , and the calculation formula is:

[0084]

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

[0086]

[0087] After the calculation of the control parameters of the mixed tower foundation is completed, the embodiment of the application can enter the field debugging stage.

[0088] Specifically, the step S2 corrects the control parameters of the mixed tower foundation to obtain the corrected control parameters of the mixed tower, including:

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

[0090] The embodiment of the application collects the actual operation vibration data of the wind turbine generator through the field vibration sensor.

[0091] S22: Extract the actual tower first-order resonance frequency f site from the actual operation vibration data by using Fourier transform.

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

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

[0094] ω Rsite = f site *20*G (4)

[0095] S232: Calculate the corrected upper speed boundary ω Rsite and the corrected lower speed boundary ω Hsite based on the corrected tower first-order resonance speed ω Lsite , and the calculation formula is:

[0096]

[0097] S233: Calculate the corrected torque upper boundary T Hsite and the corrected torque lower boundary T Lsite based on the corrected upper speed boundary ω Hsite and the corrected lower speed boundary ω Lsite , and the calculation formula is:

[0098]

[0099] The embodiment of the present application corrects the control parameters of the hybrid tower foundation, so as to ensure that the current control parameters are adapted to the actual unit, and then realize normal monitoring of the tower vibration energy target. The control parameters of the hybrid tower foundation are corrected in combination with field data, and the traditional parameter setting method relying on design parameters is abandoned, so as to ensure the accuracy of the field operation foundation control parameters.

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

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

[0102] S32: Compare the tower vibration energy value Vib site with a preset vibration energy threshold Vib edge , if the tower vibration energy value Vib site exceeds 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 , wherein the torque boundary threshold includes a corrected torque upper boundary T Hsite and a corrected torque lower boundary T Lsite , and the speed boundary threshold includes a corrected speed upper boundary ω Hsite and a corrected speed lower boundary ω Lsite .

[0103] In the operation process of the wind turbine generator, due to the limitation of physical laws and design parameters, the speed has an upper and lower limit, that is, the speed boundary, which is usually determined by the design, material strength, safety and efficiency of the wind turbine generator. The speed boundary has a certain influence on the tower vibration energy: for example, when the wind turbine generator runs at high speed, due to the action of centrifugal force, the vibration of the tower may be intensified. When the wind turbine generator runs, 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 even may cause structural damage. Therefore, in order to ensure the stability and safety of the tower, when designing the wind turbine generator, the influence of the speed boundary on the tower vibration energy needs to be considered, and the speed boundary of the wind turbine generator is adjusted according to the vibration energy of the tower. The embodiment of the present application has adapted the parameters of the tower resonance region control principle design to the actual unit, collects the tower vibration energy data in a preset speed range through a vibration sensor, and obtains a filtered vibration energy value Vib sitethe vibration energy value Vib site is compared with the preset vibration energy threshold Vib edge , as shown in Figure 8 , if the vibration energy value Vib site exceeds the preset vibration energy threshold Vib edge , the corresponding rotational speed boundary threshold is adjusted according to the preset torque boundary threshold, if the vibration energy value Vib site is within the preset vibration energy threshold Vib edge , the unit can operate normally without adaptive adjustment.

[0104] Specifically, the step S4 acquires real-time tower vibration energy monitoring data and judges whether the monitoring state of the vibration energy is abnormal, if the monitoring state is abnormal, the target rotational speed boundary is adaptively adjusted according to the adjusted rotational speed boundary threshold, including:

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

[0106] S42: comparing the real-time tower vibration energy value 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, the target rotational speed boundary is adjusted according to the rotational speed boundary threshold, and the adjusted target rotational speed boundary falls within the range of the rotational speed boundary threshold.

[0107] In wind power generation, the mixed tower will generate vibration energy when subjected to wind force, and the kinetic energy and potential energy of the tower are converted into each other during the vibration process, forming vibration energy. In the embodiment of the present application, real-time tower vibration energy monitoring data is acquired by continuously monitoring the tower vibration energy in real time, and a real-time tower vibration energy value is obtained after filtering, when the vibration energy is continuously in an abnormal state, the target rotational speed boundary is adjusted to the preset boundary threshold ω Hedge or ω Ledge , and no longer adjusted. The present application combines actual operation vibration data to adaptively adjust the rotational speed boundary, which is different from the traditional fixed rotational speed boundary, and can effectively suppress high-frequency mixed tower vibration.

[0108] Embodiment 2

[0109] Based on the above method, the embodiment of the present application further provides an adaptive rotational speed boundary setting system for suppressing high-frequency mixed tower vibration, as shown in Figures 10-12 , comprising:

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

[0111] The parameter correction module 02 is used for correcting the mixed tower basic control parameters to obtain mixed tower correction control parameters.

[0112] The data analysis and adjustment module 03 is used for obtaining tower vibration energy monitoring data in a preset speed range and analyzing, and adaptively adjusting the speed boundary threshold in the mixed tower correction control parameters according to the analysis result.

[0113] The data monitoring and adjustment module 04 is used for obtaining real-time tower vibration energy monitoring data and judging 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.

[0114] The application first sets the mixed tower basic control parameters of the wind turbine through the parameter setting module 01, then corrects the set mixed tower basic control parameters through the parameter correction module 02, 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 real-time tower vibration energy monitoring data through the data monitoring and adjustment module 04 and analyzes, and adaptively adjusts the target speed boundary according to the monitoring state. Compared with the traditional fixed speed boundary, the application can effectively reduce the mixed tower vibration frequency, thereby ensuring the stability of the unit operation, avoiding the unit in a state of long-term vibration, affecting the service life of the unit, and ensuring the power generation benefit of the mixed tower wind farm.

[0115] Specifically, the data analysis and adjustment module 03 further comprises:

[0116] The first data acquisition module 031 is used for acquiring tower vibration energy data in a preset speed range and filtering to obtain a tower vibration energy value Vib site .

[0117] The first data comparison module 032 is used for comparing the tower vibration energy value Vib site with a preset vibration energy threshold Vib edge , if the tower vibration energy value Vib site exceeds the preset vibration energy threshold Vib edge , the corresponding speed boundary threshold is adjusted according to the torque boundary threshold until the vibration energy value falls within the preset vibration energy threshold Vib edge ,

[0118] Wherein the torque boundary threshold includes a corrected torque upper boundary T Hsite and a corrected torque lower boundary T Lsite , and the speed boundary threshold includes a corrected speed upper boundary ω Hsite and a corrected speed lower boundary ω Lsite .

[0119] Based on the fact that the parameters of the tower resonance zone control principle design have been adapted to the actual unit, the embodiments of the present invention collect tower vibration energy data within a preset speed range through the first data acquisition module 031, and obtain the filtered vibration energy value Vib after a period of filtering. site The vibration energy value Vib is compared using the first data comparison module 032. site Compared with the preset vibration energy threshold Vib edge Comparison, such as Figure 8 As shown, if the vibration energy value Vib site Vib exceeding the preset vibration energy threshold edge Then, based on the preset torque boundary threshold, the corresponding speed boundary threshold is adjusted. If the vibration energy value Vib site At the preset vibration energy threshold Vib edge If the internal conditions are met, the unit can operate normally without the need for adaptive adjustments.

[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 the 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 Vib. edge If the real-time tower vibration energy value exceeds the preset vibration energy threshold Vib, the comparison will be made. edge If the monitoring status is abnormal, 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 this embodiment of the invention, the second data acquisition module 041 continuously monitors the tower vibration energy in real time, thereby acquiring real-time tower vibration energy monitoring data. After filtering, the real-time tower vibration energy value is obtained. The second data comparison module 042 compares the real-time tower vibration energy value with a preset vibration energy threshold Vib. edge In comparison, when the vibration energy remains in an abnormal state, the target rotational speed boundary is adjusted to the preset boundary threshold ω based on the rotational speed boundary threshold. Hedge Or ω Ledge No further adjustments are needed. This invention, based on actual operational vibration data, adaptively adjusts the rotational speed boundary, unlike traditional fixed rotational speed boundaries, and can effectively suppress high-frequency mixed tower vibration.

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

[0125] The application provides a kind of adaptive speed limit setting method and system for inhibiting high-frequency mixed tower vibration, the set mixed tower basic control parameter is corrected by obtaining field data, actual operation vibration data is combined, and the speed limit is adaptively adjusted according to tower vibration energy, compared with the traditional fixed speed limit, the mixed tower vibration frequency can be effectively reduced, so as to ensure the stability of unit operation, avoid the unit in the state of large vibration for a long time, affect the service life of unit, ensure the power generation benefit of mixed tower wind farm, in addition, the application discards the traditional dependence on design parameters, ensures the accuracy of field operation basic control parameter.

[0126] The concepts, principles and ideas of the application are described in detail above in combination with specific embodiments (including examples and instances). Those skilled in the art should understand that the embodiments of the application are not only the above-mentioned forms, and those skilled in the art can make any possible improvements, replacements and equivalents to the steps, methods, systems and components in the above-mentioned embodiments after reading the present application file, which should be regarded as falling within the scope of the application, and the protection scope of the application is only subject to the claims.

Claims

1. An adaptive rotational speed boundary setting method for suppressing high-frequency mixed tower vibration, characterized in that, include: Set the control parameters for the mixed tower foundation of the wind turbine according to the control principle diagram of the tower resonance zone; The basic control parameters of the mixing tower are corrected to obtain the corrected control parameters of the mixing tower; Acquire and analyze tower vibration energy monitoring data within a preset speed range, and adaptively adjust the speed boundary thresholds in the hybrid tower correction control parameters based on the analysis results. This further includes: The tower vibration energy data within a preset speed range is acquired and filtered to obtain the tower vibration energy value. ; The vibration energy value of the tower With preset vibration energy threshold Comparison, if the tower vibration energy value Exceeding the preset vibration energy threshold 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. Within the range, The torque boundary threshold includes the upper boundary of the corrected torque. and the lower boundary of the correction torque The speed boundary threshold includes the upper boundary of the corrected speed. and the lower boundary of the corrected speed ; Acquire real-time tower vibration energy monitoring data and determine whether the monitoring status of vibration energy is abnormal. If the monitoring status is abnormal, adaptively adjust the target speed boundary according to the adjusted speed boundary threshold, further including: Real-time tower vibration energy monitoring data is acquired and filtered to obtain the real-time tower vibration energy value; The real-time tower vibration energy value is compared with a preset vibration energy threshold. If the real-time tower vibration energy value exceeds the preset vibration energy threshold, a comparison is made. If the monitoring status is abnormal, 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.

2. The adaptive rotational speed boundary setting method for suppressing high-frequency mixed tower vibration according to claim 1, characterized in that, The basic control parameters of the mixing tower include: First-order resonant frequency of the tower and rotational speed boundary parameters, wherein the rotational speed boundary parameters include the first-order resonant rotational speed of the tower. upper limit of rotational speed lower boundary of rotational speed upper boundary of torque and lower boundary of torque .

3. The adaptive rotational speed boundary setting method for suppressing high-frequency mixed tower vibration according to claim 2, characterized in that, The method for setting the mixed-tower foundation control parameters of the wind turbine according to the tower resonance zone control principle diagram includes: The first-order resonance frequency of the tower is set according to the tower resonance zone control principle diagram. and gearbox transmission ratio ; Based on the first-order resonant frequency of the tower and the gearbox transmission ratio Calculate the first-order resonant speed of the tower The calculation formula is as follows: Based on the first-order resonant rotation speed of the tower Set the speed isolation zone boundary ratio And based on the first-order resonant rotation speed of the tower and the ratio of the speed isolation zone boundary Calculate the upper boundary of the rotational speed and the lower boundary of the rotational speed The calculation formula is as follows: The optimal gain parameters are set based on the equal power design principle of the tower resonant speed isolation zone. And based on the optimal gain parameter Calculate the upper boundary of torque and lower boundary of torque The calculation formula is as follows: 。 4. The adaptive rotational speed boundary setting method for suppressing high-frequency mixed tower vibration according to claim 3, characterized in that, The correction of the basic control parameters of the mixing tower to obtain the corrected control parameters of the mixing tower includes: Obtain actual operating vibration data of wind turbine units; The first-order resonant frequency of the actual tower was extracted from the actual operational vibration data using Fourier transform. ; Based on the actual tower's first-order resonant frequency The control parameters of the hybrid tower foundation are corrected to obtain the hybrid tower correction control parameters, including the correction tower first-order resonant speed. Correct the upper boundary of the rotational speed Correcting the lower boundary of the rotational speed Correcting the upper boundary of torque and the lower boundary of the correction torque .

5. The adaptive rotational speed boundary setting method for suppressing high-frequency mixed tower vibration according to claim 4, characterized in that, The first-order resonant frequency based on the actual tower The basic control parameters of the mixing tower are corrected to obtain the corrected control parameters for the mixing tower, including: Based on the actual tower's first-order resonant frequency and gearbox transmission ratio Calculate the first-order resonant speed of the correction tower The calculation formula is as follows: Based on the first-order resonant speed of the correction tower Calculate the upper boundary of the corrected speed and the lower boundary of the correction speed The calculation formula is as follows: Based on the upper boundary of the correction speed and the lower boundary of the corrected speed Calculate the upper boundary of the corrected torque and the lower boundary of the correction torque The calculation formula is as follows: 。 6. An adaptive speed boundary setting system for suppressing high-frequency mixed tower vibration, characterized in that, include: The parameter setting module is used to set the control parameters of the mixed tower foundation of the wind turbine according to the control principle diagram of the tower resonance zone. The 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. The data analysis and adjustment module is used to acquire and analyze tower vibration energy monitoring data within a preset speed range, and adaptively adjust the speed boundary thresholds in the mixed tower correction control parameters based on the analysis results. The data analysis and adjustment module also includes: The first data acquisition module is used to acquire tower vibration energy data within a preset speed range and filter it to obtain the tower vibration energy value. ; The first data comparison module is used to compare the tower vibration energy value. With preset vibration energy threshold Comparison, if the tower vibration energy value Exceeding the preset vibration energy threshold 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. Within the range, The torque boundary threshold includes the upper boundary of the corrected torque. and the lower boundary of the correction torque The speed boundary threshold includes the upper boundary of the corrected speed. and the lower boundary of the corrected speed ; A data monitoring and adjustment module is used to acquire real-time tower vibration energy monitoring data and determine whether the monitoring status of vibration energy is abnormal. If the monitoring status is abnormal, the target speed boundary is adaptively adjusted according to the adjusted speed boundary threshold. 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 the real-time tower vibration energy value. The second data comparison module is used to compare the real-time tower vibration energy value with a preset vibration energy threshold. If the real-time tower vibration energy value exceeds the preset vibration energy threshold, a comparison is made. If the monitoring status is abnormal, 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.

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