Resonance suppression method, device and equipment for wind power tower and storage medium

Abstract

The invention discloses a resonance suppression method, device and equipment of a wind power tower and a storage medium, and relates to the technical field of vibration control of wind generating sets, and the resonance suppression method comprises the steps that in a target wind generating set, the energy proportion of a target frequency band is determined based on the three-axis acceleration; initial disturbance parameters are determined, and whether the disturbance mode serves as the operation mode of the wind power tower or not is determined according to the current average wind speed, the current impeller rotating speed and the target frequency band energy ratio; when the disturbance mode is used as the operation mode, the wind power tower is disturbed based on the initial disturbance parameters; in the disturbance process, the initial disturbance amplitude is adjusted, and the initial disturbance frequency is adjusted; and determining a target impeller rotating speed instruction based on the adjusted target disturbance amplitude, target disturbance frequency, disturbance phase and current power grid angular frequency, and suppressing a resonance phenomenon by using the target impeller rotating speed instruction. Therefore, the resonance suppression effect on the wind power tower can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration control of wind turbines, and particularly relates to a method, device, equipment and storage medium for suppressing resonance of a wind power tower. Background Art

[0002] With the development of the wind power industry towards large capacity and high tower barrels, steel towers and hybrid towers have become the mainstream tower types due to their economy and high adaptability. However, this tower type may cause resonance phenomena, threatening the safe operation of the units.

[0003] Existing resonance suppression technologies have exposed multiple limitations in practical applications. For example, traditional passive damping technologies rely on fixed parameters and are difficult to adapt to the natural frequency drift caused by uneven stiffness of hybrid towers, and have poor effect on suppressing low-frequency resonance of 0.1 - 1 Hz. Active control schemes such as active mass dampers require additional precise sensors, complex mechanisms and independent energy sources, resulting in high transformation costs and poor compatibility with existing units. Strategies based on pitch or speed change are limited by a single adjustment dimension. For example, adjusting the pitch angle is likely to cause power fluctuations, and fixed speed disturbances cannot track the vibration phase and energy distribution in real time.

[0004] Therefore, how to improve the resonance suppression effect of wind power towers is a technical problem that needs to be solved urgently at present. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a method, device, equipment and storage medium for suppressing resonance of a wind power tower, which can improve the resonance suppression effect of the wind power tower. The specific scheme is as follows:

[0006] In the first aspect, the present application provides a method for suppressing resonance of a wind power tower, including: In a target wind turbine, determine the current average wind speed, the three-axis acceleration of the wind power tower, and the current impeller speed of the target wind turbine, and determine the energy ratio of the target frequency band based on the three-axis acceleration; Determine the initial disturbance amplitude, the initial disturbance frequency and the disturbance phase to determine the corresponding initial disturbance parameters, and use the current average wind speed, the current impeller speed and the energy ratio of the target frequency band to determine whether to use the disturbance mode as the operating mode of the wind power tower; the disturbance mode is a mode for suppressing the resonance phenomenon of the wind power tower; When the disturbance mode has been used as the operating mode, disturb the wind power tower based on the initial disturbance parameters; During the disturbance process, adjust the initial disturbance amplitude by using the dynamic gain regarding the current average wind speed and the three-axis acceleration, and adjust the initial disturbance frequency by using the frequency offset of the tower barrel of the wind power tower to obtain the corresponding target disturbance amplitude and target disturbance frequency; Determine a target impeller speed command based on the target disturbance amplitude, the target disturbance frequency, the disturbance phase, and the current power grid angular frequency, and use the target impeller speed command to suppress the resonance phenomenon of the wind turbine tower.

[0007] Optionally, determining the current average wind speed, the three-axis acceleration of the wind turbine tower, and the current impeller speed of the target wind turbine, and determining the target frequency band energy ratio based on the three-axis acceleration, includes: Obtain wind speed data within a first preset time period by using a preset ultrasonic anemometer located at the top of the nacelle of the wind turbine tower, and determine the current average wind speed based on the first preset time period and the wind speed data; Collect a first acceleration, a second acceleration, and a third acceleration in a preset three-dimensional coordinate system by using a preset three-axis accelerometer located at the top of the wind turbine tower to determine the corresponding three-axis acceleration; wherein, the first acceleration, the second acceleration, and the third acceleration respectively represent the accelerations in three dimensions in the preset three-dimensional coordinate system; Measure the current impeller speed of the target wind turbine by using a preset encoder to complete the speed acquisition operation; Determine the square value of the three-axis acceleration, accumulate the square values, and perform a preset square root operation on the obtained accumulated result to determine a corresponding first synthetic acceleration vector; Perform a spectrum analysis on the first synthetic acceleration vector, determine the frequency band energy within the target frequency band based on the obtained analysis result, and determine the target frequency band energy ratio by using the frequency band energy within the target frequency band and the analysis result.

[0008] Optionally, determining the initial disturbance amplitude, the initial disturbance frequency, and the disturbance phase to determine the corresponding initial disturbance parameters, includes: Randomly select an amplitude from a preset amplitude set as the current amplitude, and determine the initial disturbance amplitude based on the current amplitude and the current power grid angular frequency; Randomly select a frequency difference from a preset frequency difference set as the current frequency difference, and determine the initial disturbance frequency based on the current frequency difference and the first natural frequency of the tower barrel of the wind turbine tower; Determine the current tower top vibration phase of the wind turbine tower based on the fast Fourier transform algorithm, and determine the disturbance phase based on the current tower top vibration phase and a first preset constant value; Determine the initial disturbance parameters based on the initial disturbance amplitude, the initial disturbance frequency, and the disturbance phase.

[0009] Optionally, adjusting the initial disturbance amplitude by using the dynamic gain with respect to the current average wind speed and the triaxial acceleration, and adjusting the initial disturbance frequency by using the frequency offset of the tower barrel of the wind power tower to obtain corresponding target disturbance amplitude and target disturbance frequency, includes: Determine a first dynamic gain based on a second preset constant value and the current average wind speed, and determine a second dynamic gain based on a third preset constant value and the triaxial acceleration; Adjust the initial disturbance amplitude by using the first dynamic gain, the second dynamic gain, and a preset dynamic gain weight ratio to obtain a corresponding target disturbance amplitude; Determine the frequency offset of the tower barrel of the wind power tower. If the frequency offset is greater than a preset offset threshold, adjust the initial disturbance frequency based on the first-order natural frequency and the frequency offset to obtain a corresponding target disturbance frequency.

[0010] Optionally, after suppressing the resonance phenomenon of the wind power tower by using the target impeller speed command, further includes: Determine a second combined acceleration vector when the operating mode of the wind power tower is the disturbance mode, and determine a vibration suppression rate by using the first combined acceleration vector and the second combined acceleration vector; Determine the rated power and output power of the target wind power generation unit, and determine the maximum output power and minimum output power within a second preset time period from the output power, so as to determine a power volatility by using the rated power, the maximum output power, and the minimum output power; If the vibration suppression rate is less than a first preset suppression rate threshold and the power volatility is less than a first preset volatility threshold, adjust the target disturbance amplitude accordingly based on a preset amplitude amplification factor; If the vibration suppression rate is greater than a second preset suppression rate threshold and the power volatility is greater than a second preset volatility threshold, adjust the target disturbance amplitude accordingly based on a preset amplitude reduction factor.

[0011] Optionally, determining whether to use the disturbance mode as the operating mode of the wind power tower by using the current average wind speed, the current impeller speed, and the target frequency band energy ratio, includes: Judge whether the current average wind speed is less than a preset wind speed threshold, whether the current impeller speed is within a preset speed range, and whether the target frequency band energy ratio is greater than a preset energy threshold, and obtain each judgment result; If all the judgment results indicate yes, use the disturbance mode as the operating mode of the wind power tower.

[0012] Optionally, suppressing the resonance phenomenon of the wind turbine tower by using the target impeller speed command includes: Determining a target torque by a preset PID controller based on the target impeller speed command and the current average wind speed, and suppressing the resonance condition of the wind turbine tower based on the target torque; Determining a target desired impeller speed corresponding to the target impeller speed command, and determining a speed error based on the target desired impeller speed and the current impeller speed; When the speed error is greater than a preset error threshold, determining a target pitch angle based on an initial disturbance frequency, the disturbance phase, and a preset pitch angle calculation formula, so as to adjust the current pitch angle of the wind turbine tower by using the target pitch angle.

[0013] In a second aspect, the present application provides a resonance suppression device for a wind turbine tower, including: An information determination module, configured to determine a current average wind speed, triaxial accelerations of the wind turbine tower, and a current impeller speed of the target wind turbine generator in a target wind turbine generator, and determine a target frequency band energy ratio based on the triaxial accelerations; A mode decision module, configured to determine an initial disturbance amplitude, an initial disturbance frequency, and a disturbance phase, so as to determine corresponding initial disturbance parameters, and determine whether to use a disturbance mode as an operating mode of the wind turbine tower by using the current average wind speed, the current impeller speed, and the target frequency band energy ratio; the disturbance mode is a mode for suppressing the resonance phenomenon of the wind turbine tower; A tower disturbance module, configured to, when the disturbance mode has been used as the operating mode, disturb the wind turbine tower based on the initial disturbance parameters; An information adjustment module, configured to, during the disturbance process, adjust the initial disturbance amplitude by using a dynamic gain related to the current average wind speed and the triaxial accelerations, and adjust the initial disturbance frequency by using a frequency offset of a tower barrel of the wind turbine tower, so as to obtain corresponding target disturbance amplitude and target disturbance frequency; A resonance suppression module, configured to determine a target impeller speed command based on the target disturbance amplitude, the target disturbance frequency, the disturbance phase, and a current grid angular frequency, and suppress the resonance phenomenon of the wind turbine tower by using the target impeller speed command.

[0014] In a third aspect, the present application provides an electronic device, including: A memory, configured to store a computer program; A processor, configured to execute the computer program to implement the foregoing resonance suppression method for a wind turbine tower.

[0015] Fourthly, the present application provides a computer-readable storage medium for storing a computer program; wherein, when the computer program is executed by a processor, the resonance suppression method of the wind turbine tower described above is implemented.

[0016] In the present application, in a target wind power generating set, the current average wind speed, the three-axis acceleration of the wind turbine tower, and the current impeller speed of the target wind power generating set are determined, and the target frequency band energy ratio is determined based on the three-axis acceleration; the initial disturbance amplitude, the initial disturbance frequency, and the disturbance phase are determined to determine the corresponding initial disturbance parameters, and whether to use the disturbance mode as the operating mode of the wind turbine tower is determined by using the current average wind speed, the current impeller speed, and the target frequency band energy ratio; the disturbance mode is a mode for suppressing the resonance phenomenon of the wind turbine tower; when the disturbance mode has been used as the operating mode, the wind turbine tower is disturbed based on the initial disturbance parameters; during the disturbance process, the initial disturbance amplitude is adjusted by using the dynamic gain regarding the current average wind speed and the three-axis acceleration, and the initial disturbance frequency is adjusted by using the frequency offset of the tower barrel of the wind turbine tower to obtain the corresponding target disturbance amplitude and target disturbance frequency; a target impeller speed command is determined based on the target disturbance amplitude, the target disturbance frequency, the disturbance phase, and the current power grid angular frequency, and the resonance phenomenon of the wind turbine tower is suppressed by using the target impeller speed command. As can be seen from the above, during the operation of the target wind power generating set, it is necessary to first obtain the current average wind speed, the three-axis acceleration of the wind turbine tower, and the current impeller speed of the target wind power generating set. Subsequently, the target frequency band energy ratio is calculated based on the three-axis acceleration. Next, the initial disturbance amplitude, the initial disturbance frequency, and the disturbance phase are determined, and these parameters together constitute the initial disturbance parameters. Then, in combination with the current average wind speed, the current impeller speed, and the target frequency band energy ratio, it is determined whether to set the disturbance mode as the operating mode of the wind turbine tower. If it is determined that the disturbance mode is used as the operating mode of the wind turbine tower, the wind turbine tower is disturbed based on the initial disturbance parameters. During this disturbance process, the initial disturbance amplitude is adjusted according to the dynamic gain corresponding to the current average wind speed and the three-axis acceleration; at the same time, the frequency offset of the tower barrel of the wind turbine tower is used to adjust the initial disturbance frequency, thereby obtaining the target disturbance amplitude and target disturbance frequency. Finally, according to the target disturbance amplitude, the target disturbance frequency, the disturbance phase, and the current power grid angular frequency, a target impeller speed command is determined, and the resonance phenomenon of the wind turbine tower is suppressed through this command. In this way, the present application can improve the resonance suppression effect of the wind turbine tower, thereby ensuring the safe and stable operation of the wind power generating set to a certain extent under complex working conditions. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0018] Figure 1 Flowchart of a resonance suppression method for a wind power tower disclosed in the present application;

[0019] Figure 2 Flowchart of a specific resonance suppression method for a wind power tower disclosed in the present application;

[0020] Figure 3 Structural schematic diagram of a resonance suppression device for a wind power tower disclosed in the present application;

[0021] Figure 4 Structural diagram of an electronic device disclosed in the present application. Specific implementation manners

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0023] Existing resonance suppression technologies have exposed multiple limitations in practical applications. For example, traditional passive damping technologies rely on fixed parameters and are difficult to adapt to the natural frequency drift caused by uneven stiffness of the hybrid tower, and have poor resonance suppression effects for low-frequency resonances of 0.1 - 1 Hz. Active control schemes such as active mass dampers require additional precision sensors, complex mechanisms, and independent energy sources, resulting in high retrofit costs and poor compatibility with existing units. Strategies based on pitch or speed regulation are limited by a single adjustment dimension. For example, adjusting the pitch angle is likely to cause power fluctuations, and fixed rotational speed disturbances cannot track the vibration phase and energy distribution in real time. Therefore, the present application provides a resonance suppression method, device, equipment, and storage medium for a wind power tower, which can improve the resonance suppression effect of the wind power tower.

[0024] See Figure 1 As shown, the embodiments of the present invention disclose a resonance suppression method for a wind power tower, including:

[0025] Step S11: In the target wind power generating unit, determine the current average wind speed, the three-axis acceleration of the wind power tower, and the current impeller speed of the target wind power generating unit, and determine the energy proportion of the target frequency band based on the three-axis acceleration.

[0026] In this embodiment, during the operation of the target wind turbine generator, first, wind speed sampling is implemented by an ultrasonic anemometer deployed on the top of the nacelle. The anemometer continuously collects wind speed signals within T1 seconds (i.e., the first preset time period) at a sampling frequency not lower than H Hz (i.e., the minimum wind speed sampling frequency). After filtering out high-frequency noise caused by turbulence through a hardware filter circuit, the average wind speed within T1 seconds is calculated. This process ensures that the wind speed data can reflect the macroscopic flow characteristics of the current wind field where the unit is located by setting a fixed sampling period and a filtering threshold, and avoids interference from short-term turbulence fluctuations on subsequent control decisions.

[0027] Next, vibration monitoring is carried out using a three-axis accelerometer installed on the tower top. The sensor can synchronously collect acceleration signals in three orthogonal directions of the tower top in the Cartesian coordinate system, that is, three-axis acceleration, namely the first acceleration, the second acceleration, and the third acceleration, and these three accelerations can be expressed as , that is to say, the first acceleration, the second acceleration, and the third acceleration respectively represent the accelerations in three dimensions of the preset three-dimensional coordinate system. Then, the square values of the three-axis acceleration are determined, and the square values are accumulated. A preset square root operation is performed on the obtained accumulated result to determine the corresponding first synthetic acceleration vector. That is to say, through the vector synthesis algorithm, the three-axis acceleration is converted into a first synthetic acceleration vector representing the overall vibration intensity of the tower barrel. The specific calculation formula is , and this first synthetic acceleration vector can comprehensively reflect the vibration coupling effect of the tower barrel in the front-back, left-right, and vertical directions, and has more global representativeness compared with single-axis data.

[0028] Secondly, the monitoring of the impeller speed is realized through an encoder, which can be directly connected to the main shaft to real-time feedback the actual impeller speed with a measurement accuracy of , where r represents the number of impeller revolutions and min represents minutes. Considering the dynamic characteristics of the speed signal, the original pulse signal can be digitally filtered to eliminate high-frequency jitter caused by the clearance of the transmission chain, and ensure that the speed feedback value can accurately reflect the actual rotation state of the impeller.

[0029] Furthermore, certain data preprocessing is performed on the current average wind speed and the first synthetic acceleration obtained above. Specifically, firstly, a T2-second moving average filter is applied to the current average wind speed. By constructing a sliding window with a length of T2 seconds and performing a convolution operation on the wind speed sequence, the instantaneous wind speed fluctuations are effectively smoothed. Secondly, a spectral analysis is performed on the first synthetic acceleration to obtain an analysis result, so as to extract the energy proportion within the range of 0.1 - 1 Hz (i.e., the target frequency band). (i.e., the energy proportion of the target frequency band), which is to determine the energy proportion of the target frequency band by using the frequency band energy within the target frequency band and the energy within all frequency bands. By quantifying the proportion of the frequency band energy in the overall vibration energy, the coupling degree between the 3P excitation and the tower natural frequency can be sensitively identified, providing key characteristic parameters for resonance risk assessment. Among them, the 3P excitation refers to three main frequencies related to the blade rotation frequency of the wind turbine, and the rotation frequency of the blade will generate different excitation effects, which will have an important impact on the operation performance and stability of the unit.

[0030] Step S12: Determine the initial disturbance amplitude, initial disturbance frequency, and disturbance phase to determine the corresponding initial disturbance parameters, and use the current average wind speed, the current impeller speed, and the energy proportion of the target frequency band to determine whether to use the disturbance mode as the operation mode of the wind turbine tower; the disturbance mode is a mode for suppressing the resonance phenomenon of the wind turbine tower.

[0031] In this embodiment, it is necessary to determine the initial disturbance parameters and judge whether to enter the disturbance mode according to the actual operating conditions. First, randomly select an amplitude from the preset amplitude set as the current amplitude, and then determine the initial disturbance amplitude based on the current amplitude and the current grid angular frequency. The grid angular frequency is an important parameter in the operation of the power system, which reflects the stable state and operation characteristics of the power grid. The calculation formula for the initial disturbance amplitude is , where A is the current amplitude, and , is the current grid angular frequency. Such a calculation method links the operating state of the power grid with the disturbance amplitude, enabling the disturbance amplitude to be adjusted according to the actual situation of the power grid, so as to better adapt to the operating environment of the wind turbine tower.

[0032] Next, randomly select a frequency difference from the preset frequency difference set as the current frequency difference. Subsequently, determine the initial disturbance frequency based on the current frequency difference and the first natural frequency of the tower barrel of the wind turbine tower. The first natural frequency is an important characteristic of the wind turbine tower structure, which is related to factors such as the material and geometric shape of the tower. The calculation formula for the initial disturbance frequency is , where, is the first natural frequency of the tower barrel of the wind turbine tower, is the current frequency difference, and . By associating the disturbance frequency with the first natural frequency of the tower barrel, the disturbance signal can more specifically suppress the resonance phenomenon.

[0033] Further, based on the FFT (Fast Fourier Transform) algorithm, the current vibration phase of the wind turbine tower top is determined. The Fast Fourier Transform algorithm can convert the time-domain signal into a frequency-domain signal, thus facilitating the extraction of the phase information of the signal. By performing the Fast Fourier Transform on the vibration signal of the tower top, the current vibration phase of the tower top can be obtained. . Then, based on the current vibration phase of the tower top and the first preset constant value, the perturbation phase is determined. Specifically, the initial perturbation phase is set , where the first preset constant value is . The purpose of such a setting is to make the phase of the perturbation signal opposite to that of the tower top vibration signal, so that the vibration energy can be effectively cancelled after superposition, achieving the effect of suppressing resonance. Then, based on the initial perturbation amplitude, initial perturbation frequency, and perturbation phase, the initial perturbation parameters are determined. These parameters together constitute a complete perturbation signal, which is used to suppress the resonance phenomenon of the wind turbine tower.

[0034] Next, in this embodiment, it is judged whether the current average wind speed is less than the preset wind speed threshold, whether the current impeller speed is within the preset speed range, and whether the energy ratio in the target frequency band is greater than the preset energy threshold, and the judgment results are obtained.

[0035] In a specific implementation manner, if all the judgment results indicate yes, the perturbation mode is taken as the operating mode of the wind turbine tower. That is, when is less than the set value (i.e., the preset wind speed threshold), is within the limited range (i.e., the preset speed range), and is greater than the set value (i.e., the preset energy threshold), the perturbation mode is entered; otherwise, the perturbation mode is exited. In the perturbation mode, the corresponding perturbation signal is generated according to the determined initial perturbation parameters and superimposed on the operation control of the wind turbine tower to suppress the occurrence of the resonance phenomenon.

[0036] Step S13: When the perturbation mode has been taken as the operating mode, the wind turbine tower is perturbed based on the initial perturbation parameters.

[0037] In this embodiment, once it is determined that the perturbation mode is the operating mode of the wind turbine tower, the wind turbine tower is perturbed based on the initial perturbation parameters, that is, by generating a specific sine perturbation signal and superimposing it on the impeller speed, and at the same time performing dynamic amplitude limiting, so that the operating state of the tower changes, thereby suppressing the resonance phenomenon and ensuring the safe and stable operation of the wind turbine tower.

[0038] Step S14: During the perturbation process, adjust the initial perturbation amplitude using the dynamic gain with respect to the current average wind speed and the triaxial acceleration, and adjust the initial perturbation frequency using the frequency offset of the tower barrel of the wind turbine tower to obtain the corresponding target perturbation amplitude and target perturbation frequency.

[0039] In this embodiment, during the perturbation process of suppressing the resonance of the wind turbine tower, the environment and the state of the tower itself will change continuously. To ensure the suppression effect, it is necessary to dynamically adjust the initial perturbation parameters. By dynamically adjusting the perturbation amplitude and frequency, the perturbation signal can better adapt to the real-time operating conditions of the wind turbine tower, thereby effectively suppressing the resonance.

[0040] Specifically, first, determine the first dynamic gain based on the second preset constant value and the current average wind speed. The calculation formula for the first dynamic gain is . From this formula, it can be understood that when the wind speed is small, is close to 1, which means that the perturbation amplitude is less affected by the wind speed. As the wind speed increases, gradually decreases because the dynamic characteristics of the tower change under high wind speeds, and it is necessary to appropriately reduce the perturbation amplitude to avoid excessive perturbation.

[0041] At the same time, determine the second dynamic gain based on the third preset constant value and the triaxial acceleration. First, obtain the first synthetic acceleration vector determined based on the triaxial acceleration, and then calculate the second dynamic gain , and limit it to , where g is the acceleration due to gravity. Similarly, from this formula, it can be seen that when the vibration acceleration of the tower is large, is close to 1, indicating that it is necessary to increase the perturbation amplitude to suppress the vibration. When the vibration is small, is close to 0, and the perturbation amplitude can be reduced accordingly.

[0042] After obtaining the first dynamic gain and the second dynamic gain, adjust the initial perturbation amplitude using the preset dynamic gain weight ratio. Assume that the weight of the first dynamic gain is 0.6 and the weight of the second dynamic gain is 0.4. Then the target perturbation amplitude . This weighted combination method comprehensively considers the influence of wind speed and vibration on the perturbation amplitude, making the adjusted amplitude more in line with the actual requirements.

[0043] During the perturbation process, the frequency of the tower barrel of the wind turbine tower may shift. To ensure that the perturbation frequency always matches the natural frequency of the tower barrel, it is necessary to monitor the frequency offset in real time. By performing a spectral analysis on the vibration signal at the top of the tower every T3 seconds, calculate the offset of the natural frequency of the tower barrel , when the offset is greater than the preset offset threshold, the initial disturbance frequency is adjusted based on the first natural frequency and the frequency offset to obtain the corresponding target disturbance frequency. The preset offset threshold can be , and the calculation formula for the target disturbance frequency is .

[0044] It can be understood that dynamically adjusting the initial disturbance amplitude and frequency during the disturbance process is of great significance. On the one hand, by adjusting the disturbance amplitude according to the wind speed and vibration conditions, effective suppression of resonance can be maintained under different wind conditions, avoiding affecting the suppression effect due to too large or too small amplitude. On the other hand, real-time tracking of the tower frequency offset and adjusting the disturbance frequency can ensure that the disturbance signal matches the dynamic characteristics of the tower, improving the accuracy and stability of resonance suppression.

[0045] Step S15: Determine the target impeller speed command based on the target disturbance amplitude, the target disturbance frequency, the disturbance phase, and the current grid angular frequency, and use the target impeller speed command to suppress the resonance phenomenon of the wind turbine tower.

[0046] In this embodiment, during the resonance suppression process of the wind turbine tower, when the target disturbance amplitude, the target disturbance frequency, the disturbance phase, and the current grid angular frequency are obtained, the target impeller speed command can be determined accordingly, and this command is the control parameter for suppressing resonance.

[0047] Specifically, according to the target disturbance amplitude , the target disturbance frequency , the disturbance phase , and the current grid angular frequency , the target impeller speed command can be determined according to the formula. The formula for determining the command is , and moreover, this command is a dynamic signal that changes with time. It takes the grid angular frequency as the basis and superimposes a sine disturbance signal determined by the target disturbance amplitude, frequency, and phase. And the range of the speed in the target impeller speed command is , such a design makes the impeller speed fluctuate to a certain extent on the basis of the grid frequency, thereby changing the 3P excitation frequency generated by the impeller rotation and avoiding its coupling with the tower natural frequency to achieve the purpose of suppressing resonance.

[0048] After determining the target impeller speed command, it can be further processed with the aid of a preset PID controller (i.e., Proportion Integration Differentiation Controller). The PID controller is a commonly used feedback control algorithm in the field of industrial control. It can calculate through three links of proportion, integral, and differential based on the error signal of the system and output an appropriate control quantity. In this embodiment, the preset PID controller determines the target torque based on the target impeller speed command and the current average wind speed. , and the calculation formula of the target torque is as follows:

[0049] ;

[0050] In the formula, is the proportional parameter in the preset PID controller, is the integral parameter in the preset PID controller.

[0051] After obtaining the target torque, the resonance condition of the wind turbine tower is suppressed based on the target torque. By adjusting the electromagnetic torque of the generator, the rotational resistance of the impeller is changed, thereby affecting the speed of the impeller. When the target torque increases, the impeller speed will decrease accordingly; conversely, the impeller speed will increase. This can make the rotational state of the impeller more in line with the requirements of the target impeller speed command, thereby effectively suppressing resonance.

[0052] In addition, in this embodiment, the target desired impeller speed corresponding to the target impeller speed command is determined. Here, the target desired impeller speed is actually the target impeller speed command, and the speed error is determined based on the target desired impeller speed and the current impeller speed. . The speed error reflects the degree of difference between the current impeller speed and the target speed, and is an important basis for judging whether it is necessary to further adjust the pitch angle.

[0053] It should be noted that when the speed error is greater than the preset error threshold, it means that the impeller speed cannot be effectively controlled only by adjusting the torque, and the pitch angle needs to be further adjusted. Among them, the preset error threshold can be . Therefore, the target pitch angle is determined based on the initial disturbance frequency, disturbance phase, and the preset pitch angle calculation formula. The preset pitch angle calculation formula is:

[0054] ;

[0055] In the formula, t represents the time variable, which indicates any moment as time goes by since the start of calculating or monitoring relevant parameters, and it is a continuously changing value. By adjusting the pitch angle, the windward angle of the blade can be changed, thereby changing the aerodynamic torque acting on the impeller. When the pitch angle increases, the windward area of the blade decreases, the aerodynamic torque decreases, and the impeller speed decreases; conversely, the impeller speed increases.

[0056] Finally, the current pitch angle of the wind turbine tower is adjusted using the target pitch angle to make the impeller speed closer to the target desired impeller speed, further suppressing the resonance phenomenon. In practical applications, the adjustment of the pitch angle needs to be precisely controlled to avoid over-adjustment causing system instability. At the same time, the response speed and accuracy of the pitch angle adjustment also need to be considered to ensure that the speed error can be effectively addressed in a timely manner.

[0057] In addition, to ensure the safety of the unit in case of a fault, a multi-level safety protection mechanism is specifically set up. The safety protection is divided into three levels, namely L1 warning level, L2 load reduction level, and L3 emergency shutdown level. Specifically, for the L1 warning level, when the current resultant acceleration vector is greater than 0.2g and lasts for T4 seconds, the system will immediately trigger an audible and visual alarm, where g is the acceleration due to gravity. This warning mechanism can timely remind the operation and maintenance personnel to pay attention to the vibration situation of the tower, so as to take measures in advance to prevent the fault from deteriorating further. For the L2 load reduction level, when the current resultant acceleration vector is greater than 0.25g, the system will automatically halve the amplitude of the speed fluctuation. By reducing the amplitude of the speed fluctuation, the dynamic load borne by the tower can be reduced, and the risk of resonance occurrence can be lowered to protect the safety of the tower structure. For the L3 emergency shutdown level, when the current resultant acceleration vector is greater than 0.3g, the system will immediately perform an emergency shutdown operation and retract the blade angle to 90 degrees. This is to quickly stop the operation of the unit in extreme cases to avoid serious damage to the tower and ensure the safety of personnel and equipment.

[0058] Moreover, for the convenience of subsequent offline analysis and algorithm optimization, the system will store the operation data. The operation data includes but is not limited to the current average wind speed, the current impeller speed, the target disturbance amplitude, the vibration suppression rate, and the power fluctuation rate, etc. And these data will be stored in the CSV (i.e., Comma-Separated Values) format, which is convenient for subsequent data mining and analysis, providing strong support for further optimizing the resonance suppression algorithm.

[0059] As can be seen above, during the operation of the target wind turbine generator set, it is necessary to first obtain the current average wind speed, the three-axis acceleration of the wind turbine tower, and the current impeller speed of the target wind turbine generator set. Subsequently, calculate the proportion of energy in the target frequency band based on the three-axis acceleration. Next, determine the initial disturbance amplitude, the initial disturbance frequency, and the disturbance phase, which together constitute the initial disturbance parameters. Then, combine the current average wind speed, the current impeller speed, and the proportion of energy in the target frequency band to determine whether to set the disturbance mode as the operation mode of the wind turbine tower. If it is determined that the disturbance mode is the operation mode of the wind turbine tower, apply a disturbance to the wind turbine tower according to the initial disturbance parameters. During this disturbance process, adjust the initial disturbance amplitude according to the dynamic gain corresponding to the current average wind speed and the three-axis acceleration; at the same time, use the frequency offset of the wind turbine tower barrel to adjust the initial disturbance frequency, so as to obtain the target disturbance amplitude and the target disturbance frequency. Finally, determine the target impeller speed command according to the target disturbance amplitude, the target disturbance frequency, the disturbance phase, and the current grid angular frequency, and suppress the resonance phenomenon of the wind turbine tower through this command. In this way, the present application can improve the resonance suppression effect on the wind turbine tower, thereby ensuring the safe and stable operation of the wind turbine generator set under complex working conditions to a certain extent.

[0060] Participate Figure 2 As shown, in order to further improve the resonance suppression effect, the embodiment of the present application further provides a specific resonance suppression method for a wind turbine tower, including:

[0061] Step S21, during the process of disturbing the wind turbine tower, use the target impeller speed command to suppress the resonance phenomenon of the wind turbine tower.

[0062] Among them, the specific implementation process of step S21 can refer to the corresponding content disclosed in the foregoing embodiments, and will not be elaborated here.

[0063] Step S22, after suppressing the resonance phenomenon, determine the second synthetic acceleration vector when the operation mode of the wind turbine tower is the disturbance mode, and use the first synthetic acceleration vector and the second synthetic acceleration vector to determine the vibration suppression rate.

[0064] In this embodiment, the first synthetic acceleration vector has been obtained, which reflects the vibration state of the wind turbine tower when no suppression measures are taken. When the resonance phenomenon is suppressed by using the target impeller speed command, the wind turbine tower is in the disturbance mode, and at this time, the vibration data of the tower needs to be obtained again. Similarly, use the method of obtaining and calculating the first synthetic acceleration vector to determine the second synthetic acceleration vector. And, the first synthetic acceleration vector can be expressed as , and the second synthetic acceleration vector can be expressed as , the vibration suppression rate is determined by using the first synthetic acceleration vector and the second synthetic acceleration vector, and the formula for determining the vibration suppression rate is as follows:

[0065] .

[0066] Step S23: Determine the rated power and output power of the target wind turbine generator set, and determine the maximum output power and minimum output power within a second preset time period from the output power, so as to determine the power volatility by using the rated power, the maximum output power, and the minimum output power.

[0067] In this embodiment, the rated power of the target wind turbine generator set represents the maximum power that the unit can stably output under standard working conditions. During the operation of the wind power tower, it is necessary to monitor the output power of the unit in real time.

[0068] Within the second preset time period, continuously record the change of the output power, and find out the maximum output power and the minimum output power . The power volatility is an important index to measure the stability of the output power of the wind turbine generator set, and its calculation formula is:

[0069] ;

[0070] It can be seen from the above formula that a lower power volatility indicates that the output power of the unit is relatively stable, which is beneficial to the stable operation of the power system; while a higher power volatility may cause an impact on the power grid and affect the power quality.

[0071] Step S24: If the vibration suppression rate is less than the first preset suppression rate threshold and the power volatility is less than the first preset volatility threshold, then adjust the target disturbance amplitude accordingly based on the preset amplitude amplification factor.

[0072] In this embodiment, the first preset suppression rate threshold can be 30%, and the first preset volatility threshold can be 1%. In this case, when the vibration suppression rate is less than 30%, it indicates that the current resonance suppression effect does not meet the expectation, and the vibration of the tower is still relatively obvious; at the same time, the power volatility is less than 1%, indicating that the output power of the unit is relatively stable and there is room for further adjustment. At this time, adjust the target disturbance amplitude based on the preset amplitude amplification factor. Among them, the preset amplitude amplification factor can be 1.2 times, that is to say, at this time, it is necessary to increase the target disturbance amplitude to 1.2 times of the original.

[0073] That is to say, in this case, by appropriately increasing the target disturbance amplitude, the suppression effect on resonance can be enhanced, and it is expected to increase the vibration suppression rate and better control the vibration of the tower.

[0074] Step S25: If the vibration suppression rate is greater than the second preset suppression rate threshold and the power fluctuation rate is greater than the second preset fluctuation rate threshold, then adjust the target disturbance amplitude accordingly based on a preset amplitude reduction multiple.

[0075] In this embodiment, the second preset suppression rate threshold can be 60%, and the second preset fluctuation rate threshold can be 2%. In this case, when the vibration suppression rate is greater than 60%, it indicates that the current resonance suppression effect is good and the vibration of the tower has been effectively controlled. However, when the power fluctuation rate is greater than 2%, it shows that the output power of the unit fluctuates greatly, which may have an adverse impact on the stability of the power grid. At this time, the target disturbance amplitude is adjusted based on the preset amplitude reduction multiple. Among them, the preset amplitude reduction multiple can be 0.8 times, that is to say, at this time, the target disturbance amplitude needs to be reduced to 0.8 times of the original.

[0076] In this case, by appropriately reducing the target disturbance amplitude, although the vibration suppression rate may decrease slightly, it can effectively reduce the power fluctuation rate, ensure the stability of the output power of the wind turbine generator, and achieve a better balance between resonance suppression and stable power output of the wind turbine tower.

[0077] As can be seen from the above, in this embodiment, first, the second synthetic acceleration vector in the disturbance mode is obtained, and the vibration suppression rate is calculated by comparing it with the first synthetic acceleration vector before suppression. At the same time, the maximum and minimum values of the output power within the second preset time period are statistically analyzed, and the power fluctuation rate is determined in combination with the rated power, so as to quantitatively evaluate the suppression effect and power stability. In addition, a multi-level safety protection mechanism is set by real-time monitoring of the synthetic acceleration vector. When the vibration exceeds different thresholds, early warning, load reduction, and emergency shutdown are triggered respectively to ensure the safety of the unit. At the same time, key operation parameters are stored for offline analysis and algorithm optimization, forming a closed-loop feedback adaptive control system to ensure dynamic adjustment of disturbance parameters under different working conditions and improve the accuracy of resonance suppression and the reliability of system operation.

[0078] Correspondingly, as shown in Figure 3 the embodiment of the present application provides a resonance suppression device for a wind turbine tower, including: An information determination module 11, configured to determine the current average wind speed, the three-axis acceleration of the wind turbine tower, and the current impeller speed of the target wind turbine generator in the target wind turbine generator, and determine the target frequency band energy ratio based on the three-axis acceleration; The mode decision module 12 is used to determine the initial disturbance amplitude, initial disturbance frequency, and disturbance phase to determine the corresponding initial disturbance parameters, and use the current average wind speed, the current impeller speed, and the target frequency band energy ratio to determine whether to use the disturbance mode as the operating mode of the wind turbine tower; the disturbance mode is a mode for suppressing the resonance phenomenon of the wind turbine tower. The tower disturbance module 13 is used to disturb the wind turbine tower based on the initial disturbance parameters when the disturbance mode has been used as the operating mode. The information adjustment module 14 is used to adjust the initial disturbance amplitude by using the dynamic gain regarding the current average wind speed and the triaxial acceleration during the disturbance process, and adjust the initial disturbance frequency by using the frequency offset of the tower barrel of the wind turbine tower to obtain the corresponding target disturbance amplitude and target disturbance frequency. The resonance suppression module 15 is used to determine the target impeller speed command based on the target disturbance amplitude, the target disturbance frequency, the disturbance phase, and the current grid angular frequency, and use the target impeller speed command to suppress the resonance phenomenon of the wind turbine tower.

[0079] As can be seen from the above, during the operation of the target wind turbine generator, it is necessary to first obtain the current average wind speed, the triaxial acceleration of the wind turbine tower, and the current impeller speed of the target wind turbine generator. Subsequently, calculate the target frequency band energy ratio based on the triaxial acceleration. Next, determine the initial disturbance amplitude, initial disturbance frequency, and disturbance phase, which together constitute the initial disturbance parameters. Then, combine the current average wind speed, the current impeller speed, and the target frequency band energy ratio to determine whether to set the disturbance mode as the operating mode of the wind turbine tower. If it is determined that the disturbance mode is used as the operating mode of the wind turbine tower, the wind turbine tower is disturbed based on the initial disturbance parameters. During this disturbance process, the initial disturbance amplitude is adjusted according to the dynamic gain corresponding to the current average wind speed and the triaxial acceleration; at the same time, the initial disturbance frequency is adjusted by using the frequency offset of the tower barrel of the wind turbine tower to obtain the target disturbance amplitude and target disturbance frequency. Finally, based on the target disturbance amplitude, the target disturbance frequency, the disturbance phase, and the current grid angular frequency, determine the target impeller speed command, and suppress the resonance phenomenon of the wind turbine tower through this command. In this way, the present application can improve the resonance suppression effect on the wind turbine tower, thereby ensuring the safe and stable operation of the wind turbine generator under complex working conditions to a certain extent.

[0080] In some specific embodiments, the information determination module 11 specifically includes: The wind speed determination unit is used to obtain the wind speed data within a first preset time period by using a preset ultrasonic anemometer located at the top of the nacelle of the wind turbine tower, and determine the current average wind speed based on the first preset time period and the wind speed data. An acceleration determination unit, configured to collect a first acceleration, a second acceleration, and a third acceleration in a preset three-dimensional coordinate system by using a preset three-axis accelerometer located at the top of the wind turbine tower, so as to determine corresponding three-axis accelerations; wherein, the first acceleration, the second acceleration, and the third acceleration respectively represent accelerations in three dimensions in the preset three-dimensional coordinate system; A rotational speed acquisition unit, configured to measure the current impeller rotational speed of the target wind power generating set by using a preset encoder, so as to complete the rotational speed acquisition operation; A vector determination unit, configured to determine the square values of the three-axis accelerations, accumulate the square values, and perform a preset square root operation on the obtained accumulation result, so as to determine a corresponding first composite acceleration vector; A proportion determination unit, configured to perform spectrum analysis on the first composite acceleration vector, determine the frequency band energy within a target frequency band based on the obtained analysis result, and determine the proportion of the target frequency band energy by using the frequency band energy within the target frequency band and the analysis result.

[0081] In some specific embodiments, the mode decision module 12 specifically includes: An initial amplitude determination unit, configured to randomly select an amplitude from a preset amplitude set as the current amplitude, and determine an initial disturbance amplitude based on the current amplitude and the current power grid angular frequency; An initial frequency determination unit, configured to randomly select a frequency difference from a preset frequency difference set as the current frequency difference, and determine an initial disturbance frequency based on the current frequency difference and the first-order natural frequency of the tower barrel of the wind turbine tower; A phase determination unit, configured to determine the current vibration phase of the top of the wind turbine tower based on the fast Fourier transform algorithm, and determine the disturbance phase based on the current vibration phase of the top of the tower and a first preset constant value; A parameter determination unit, configured to determine initial disturbance parameters based on the initial disturbance amplitude, the initial disturbance frequency, and the disturbance phase.

[0082] In some specific embodiments, the information adjustment module 14 specifically includes: A gain determination unit, configured to determine a first dynamic gain based on a second preset constant value and the current average wind speed, and determine a second dynamic gain based on a third preset constant value and the three-axis accelerations; A target amplitude determination unit, configured to adjust the initial disturbance amplitude by using the first dynamic gain, the second dynamic gain, and a preset dynamic gain weight ratio, so as to obtain a corresponding target disturbance amplitude; A target frequency determination unit, configured to determine a frequency offset of a tower barrel of the wind power tower. If the frequency offset is greater than a preset offset threshold, the initial disturbance frequency is adjusted based on the first natural frequency and the frequency offset to obtain a corresponding target disturbance frequency.

[0083] In some specific embodiments, the resonance suppression module 15 specifically further includes: A suppression rate determination unit, configured to determine a second combined acceleration vector when the operation mode of the wind power tower is the disturbance mode, and determine a vibration suppression rate by using the first combined acceleration vector and the second combined acceleration vector; A volatility determination unit, configured to determine the rated power and the output power of the target wind turbine generator set, and determine the maximum output power and the minimum output power within a second preset time period from the output power, so as to determine a power volatility by using the rated power, the maximum output power, and the minimum output power; A first amplitude adjustment unit, configured to, if the vibration suppression rate is less than a first preset suppression rate threshold and the power volatility is less than a first preset volatility threshold, perform a corresponding adjustment on the target disturbance amplitude based on a preset amplitude amplification multiple; A second amplitude adjustment unit, configured to, if the vibration suppression rate is greater than a second preset suppression rate threshold and the power volatility is greater than a second preset volatility threshold, perform a corresponding adjustment on the target disturbance amplitude based on a preset amplitude reduction multiple.

[0084] In some specific embodiments, the mode decision module 12 specifically includes: An information judgment unit, configured to judge whether the current average wind speed is less than a preset wind speed threshold, whether the current impeller speed is within a preset speed range, and whether the energy ratio of the target frequency band is greater than a preset energy threshold, and obtain each judgment result; A mode determination unit, configured to, if all the judgment results indicate yes, use the disturbance mode as the operation mode of the wind power tower.

[0085] In some specific embodiments, the resonance suppression module 15 specifically includes: A resonance suppression unit, configured to determine a target torque based on the target impeller speed command and the current average wind speed through a preset PID controller, and suppress the resonance condition of the wind power tower based on the target torque; An error determination unit, configured to determine a target desired impeller speed corresponding to the target impeller speed command, and determine a speed error based on the target desired impeller speed and the current impeller speed; The pitch angle adjustment unit is configured to, when the rotational speed error is greater than a preset error threshold, determine a target pitch angle based on an initial disturbance frequency, the disturbance phase, and a preset pitch angle calculation formula, so as to adjust the current pitch angle of the wind turbine tower using the target pitch angle.

[0086] Furthermore, an embodiment of the present application also discloses an electronic device. Figure 4 FIG. 20 is a structural diagram of an electronic device 20 shown according to an exemplary embodiment. The content in the figure should not be considered as any limitation on the scope of use of the present application. The electronic device 20 may specifically include: at least one processor 21, at least one memory 22, a power supply 23, a communication interface 24, an input / output interface 25, and a communication bus 26. Among them, the memory 22 is used to store a computer program, and the computer program is loaded and executed by the processor 21 to implement the relevant steps in the resonance suppression method of the wind turbine tower disclosed in any of the foregoing embodiments. In addition, the electronic device 20 in this embodiment may specifically be an electronic computer.

[0087] In this embodiment, the power supply 23 is used to provide operating voltage for each hardware device on the electronic device 20; the communication interface 24 can create a data transmission channel between the electronic device 20 and external devices, and the communication protocol it follows is any communication protocol applicable to the technical solution of the present application, and specific limitations are not imposed on it here; the input / output interface 25 is used to obtain external input data or output data to the outside, and the specific interface type can be selected according to specific application needs, and no specific limitations are imposed here.

[0088] In addition, as a carrier for resource storage, the memory 22 may be a read-only memory, a random access memory, a magnetic disk, or an optical disc, etc. The resources stored thereon may include an operating system 221, a computer program 222, etc., and the storage method may be short-term storage or permanent storage.

[0089] Among them, the operating system 221 is used to manage and control each hardware device on the electronic device 20 and the computer program 222, and it may be Windows Server, Netware, Unix, Linux, etc. In addition to the computer program that can be used to complete the resonance suppression method of the wind turbine tower executed by the electronic device 20 disclosed in any of the foregoing embodiments, the computer program 222 may further include a computer program that can be used to complete other specific tasks.

[0090] Furthermore, the present application also discloses a computer-readable storage medium for storing a computer program; wherein, when the computer program is executed by a processor, the resonance suppression method of the wind turbine tower disclosed above is implemented. For the specific steps of the method, reference may be made to the corresponding content disclosed in the foregoing embodiments, and details are not repeated here.

[0091] In the present specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method section.

[0092] Those skilled in the art can further realize that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. To clearly illustrate the interchangeability of hardware and software, the composition and steps of the examples have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0093] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be directly implemented by hardware, software modules executed by a processor, or a combination of the two. The software modules can be placed in a random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0094] Finally, it should also be noted that in this document, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0095] The above has introduced the technical solution provided by this application in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of this application. The description of the above embodiments is only used to help understand the method and its core idea of this application; at the same time, for those of ordinary skill in the art, according to the idea of this application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to this application.

Claims

1. A resonance suppression method for a wind power tower, characterized in that, Including: In a target wind turbine generator set, determine the current average wind speed, the three-axis acceleration of the wind turbine tower, and the current impeller speed of the target wind turbine generator set, and determine the target frequency band energy ratio based on the three-axis acceleration; Determine the initial disturbance amplitude, the initial disturbance frequency, and the disturbance phase to determine the corresponding initial disturbance parameters, and use the current average wind speed, the current impeller speed, and the target frequency band energy ratio to determine whether to use the disturbance mode as the operating mode of the wind turbine tower; the disturbance mode is a mode for suppressing the resonance phenomenon of the wind turbine tower; When the disturbance mode has been used as the operating mode, disturb the wind turbine tower based on the initial disturbance parameters; During the disturbance process, adjust the initial disturbance amplitude using the dynamic gain regarding the current average wind speed and the three-axis acceleration, and adjust the initial disturbance frequency using the frequency offset of the tower barrel of the wind turbine tower to obtain the corresponding target disturbance amplitude and target disturbance frequency; Determine the target impeller speed command based on the target disturbance amplitude, the target disturbance frequency, the disturbance phase, and the current grid angular frequency, and use the target impeller speed command to suppress the resonance phenomenon of the wind turbine tower.

2. The resonance suppression method of the wind power tower according to claim 1, wherein The determination of the current average wind speed, the three-axis acceleration of the wind turbine tower, and the current impeller speed of the target wind turbine generator set, and the determination of the target frequency band energy ratio based on the three-axis acceleration, includes: Obtain the wind speed data within a first preset time period using a preset ultrasonic anemometer located at the top of the nacelle of the wind turbine tower, and determine the current average wind speed based on the first preset time period and the wind speed data; Collect the first acceleration, the second acceleration, and the third acceleration in a preset three-dimensional coordinate system using a preset three-axis accelerometer located at the top of the wind turbine tower to determine the corresponding three-axis acceleration; wherein, the first acceleration, the second acceleration, and the third acceleration respectively represent the accelerations in three dimensions in the preset three-dimensional coordinate system; Measure the current impeller speed of the target wind turbine generator set using a preset encoder to complete the speed acquisition operation; Determine the square value of the three-axis acceleration, accumulate the square values, and perform a preset square root operation on the obtained accumulated result to determine the corresponding first synthetic acceleration vector; Perform a spectrum analysis on the first synthetic acceleration vector, determine the frequency band energy within the target frequency band based on the obtained analysis result, and determine the target frequency band energy ratio using the frequency band energy within the target frequency band and the analysis result.

3. The resonance suppression method for a wind power tower according to claim 1, characterized in that, The determination of the initial disturbance amplitude, the initial disturbance frequency, and the disturbance phase to determine the corresponding initial disturbance parameters, includes: Randomly select an amplitude from a preset amplitude set as the current amplitude, and determine the initial disturbance amplitude based on the current amplitude and the current grid angular frequency; Randomly select a frequency difference from a preset frequency difference set as the current frequency difference, and determine the initial disturbance frequency based on the current frequency difference and the first natural frequency of the tower barrel of the wind turbine tower; Determine the current vibration phase of the tower top of the wind turbine tower based on the fast Fourier transform algorithm, and determine the disturbance phase based on the current vibration phase of the tower top and a first preset constant value; Determine the initial disturbance parameters based on the initial disturbance amplitude, the initial disturbance frequency, and the disturbance phase.

4. The resonance suppression method of a wind power tower according to claim 3, characterized in that The adjusting the initial disturbance amplitude by using the dynamic gain with respect to the current average wind speed and the three-axis acceleration, and adjusting the initial disturbance frequency by using the frequency offset of the tower barrel of the wind turbine tower to obtain the corresponding target disturbance amplitude and target disturbance frequency, includes: Determine a first dynamic gain based on a second preset constant value and the current average wind speed, and determine a second dynamic gain based on a third preset constant value and the three-axis acceleration; Adjust the initial disturbance amplitude by using the first dynamic gain, the second dynamic gain, and a preset dynamic gain weight ratio to obtain the corresponding target disturbance amplitude; Determine the frequency offset of the tower barrel of the wind turbine tower. If the frequency offset is greater than a preset offset threshold, adjust the initial disturbance frequency based on the first-order natural frequency and the frequency offset to obtain the corresponding target disturbance frequency.

5. The resonance suppression method of the wind power tower according to claim 2, characterized in that After suppressing the resonance phenomenon of the wind turbine tower by using the target impeller speed command, further includes: Determine a second combined acceleration vector when the operation mode of the wind turbine tower is the disturbance mode, and determine the vibration suppression rate by using the first combined acceleration vector and the second combined acceleration vector; Determine the rated power and the output power of the target wind turbine generator, and determine the maximum output power and the minimum output power within a second preset time period from the output power to determine the power volatility by using the rated power, the maximum output power, and the minimum output power; If the vibration suppression rate is less than a first preset suppression rate threshold and the power volatility is less than a first preset volatility threshold, adjust the target disturbance amplitude accordingly based on a preset amplitude amplification factor; If the vibration suppression rate is greater than a second preset suppression rate threshold and the power volatility is greater than a second preset volatility threshold, adjust the target disturbance amplitude accordingly based on a preset amplitude reduction factor.

6. The resonance suppression method for a wind power tower according to claim 1, characterized in that The determining whether to use the disturbance mode as the operation mode of the wind turbine tower by using the current average wind speed, the current impeller speed, and the target frequency band energy ratio, includes: Judge whether the current average wind speed is less than a preset wind speed threshold, whether the current impeller speed is within a preset speed range, and whether the target frequency band energy ratio is greater than a preset energy threshold, and obtain each judgment result; If all the judgment results indicate yes, use the disturbance mode as the operation mode of the wind turbine tower.

7. The resonance suppression method for a wind power tower according to any one of claims 1 to 6, characterized in that The suppressing the resonance phenomenon of the wind turbine tower by using the target impeller speed command, includes: Determine a target torque based on the target impeller speed command and the current average wind speed through a preset PID controller, and suppress the resonance condition of the wind turbine tower based on the target torque; Determine the target desired impeller speed corresponding to the target impeller speed command, and determine the speed error based on the target desired impeller speed and the current impeller speed; When the speed error is greater than a preset error threshold, determine the target pitch angle based on the initial disturbance frequency, the disturbance phase, and a preset pitch angle calculation formula, so as to adjust the current pitch angle of the wind turbine tower using the target pitch angle.

8. A resonance suppression device for a wind power tower, characterized in that Comprising: An information determination module, configured to determine the current average wind speed, the three-axis acceleration of the wind turbine tower, and the current impeller speed of the target wind turbine in the target wind turbine, and determine the target frequency band energy ratio based on the three-axis acceleration; A mode decision module, configured to determine the initial disturbance amplitude, the initial disturbance frequency, and the disturbance phase, so as to determine the corresponding initial disturbance parameters, and determine whether to use the disturbance mode as the operating mode of the wind turbine tower by using the current average wind speed, the current impeller speed, and the target frequency band energy ratio; the disturbance mode is a mode for suppressing the resonance phenomenon of the wind turbine tower; A tower disturbance module, configured to, when the disturbance mode has been used as the operating mode, disturb the wind turbine tower based on the initial disturbance parameters; An information adjustment module, configured to, during the disturbance process, adjust the initial disturbance amplitude by using the dynamic gain regarding the current average wind speed and the three-axis acceleration, and adjust the initial disturbance frequency by using the frequency offset of the tower barrel of the wind turbine tower, so as to obtain the corresponding target disturbance amplitude and target disturbance frequency; A resonance suppression module, configured to determine a target impeller speed command based on the target disturbance amplitude, the target disturbance frequency, the disturbance phase, and the current grid angular frequency, and suppress the resonance phenomenon of the wind turbine tower by using the target impeller speed command.

9. An electronic device, characterized in that, Comprising: A memory, configured to store a computer program; A processor, configured to execute the computer program to implement the resonance suppression method for a wind turbine tower according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, For storing a computer program; wherein, when the computer program is executed by a processor, the resonance suppression method for a wind turbine tower according to any one of claims 1 to 7 is implemented.

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