A coordinated optimization control system for variable pitch of a wind turbine

Abstract

The present application relates to the technical field of wind turbine control, in particular to a variable pitch coordination optimization control system of a wind turbine, the present application obtains the wind condition value, the unit operation value and the variable pitch state evaluation value of the target wind turbine corresponding to the current monitoring period through monitoring and analysis, and then analyzes the rationality of the variable pitch angle setting of the target wind turbine corresponding to the current monitoring period, the operation state of the unit and the operation state of the variable pitch control system itself, on the one hand, the variable pitch angle of the wind turbine is dynamically adjusted by real-time monitoring of the change of the wind condition, so as to adapt to the changing natural environmental conditions and optimize the output power of the wind turbine, thereby improving the operation efficiency and safety of the wind turbine, on the other hand, the possible faults or abnormalities of the wind turbine and the performance and stability of the variable pitch control system can be found in time, and corresponding measures can be taken for repair or prevention to ensure normal operation.

Description

Technical Field

[0001] This invention relates to the field of wind turbine control technology, specifically to a pitch coordination and optimization control system for wind turbines. Background Technology

[0002] With the continued growth in global demand for renewable energy, wind energy, as a clean and renewable energy source, is becoming increasingly important. In the wind power sector, wind turbines, as key equipment for converting wind energy into electricity, directly affect the economic benefits of the entire wind farm and the stable operation of the power grid through their operational efficiency and stability. During the operation of wind turbines, the pitch control system is a crucial component; however, traditional wind turbine pitch control systems often struggle to achieve optimal wind energy capture and conversion efficiency under complex and variable wind conditions.

[0003] Specifically, traditional pitch control systems mainly rely on preset pitch angle adjustment strategies, lacking the ability to accurately perceive and quickly respond to environmental parameters such as real-time wind speed and wind direction. This results in large fluctuations in the output power of wind turbines when wind speed changes significantly or wind direction is unstable, and may even lead to abnormal situations such as overload or shutdown, seriously affecting the operating efficiency and stability of wind farms.

[0004] Traditional pitch control systems often focus only on adjusting the pitch angle, neglecting comprehensive monitoring of the overall operating status of the wind turbine and the operating status of the pitch system itself. This results in the system being unable to detect and resolve problems in a timely manner, leading to equipment failure and seriously affecting normal operation.

[0005] To address the aforementioned shortcomings, a pitch coordination optimization control system for wind turbines is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a pitch coordination optimization control system for wind turbine generators to solve the problems mentioned in the background.

[0007] The objective of this invention can be achieved through the following technical solution: a pitch coordination optimization control system for wind turbine generators, comprising:

[0008] The wind condition monitoring and analysis module is used to monitor the wind conditions of the target wind turbine during the current monitoring period, obtain the wind condition parameters of the target wind turbine during the current monitoring period, and analyze the wind condition value of the target wind turbine during the current monitoring period to obtain the wind condition value of the target wind turbine during the current monitoring period.

[0009] Preferably, the wind conditions of the target wind turbine during the current monitoring period are monitored to obtain the wind condition parameters of the target wind turbine during the current monitoring period. The specific monitoring method is as follows:

[0010] Detection points are evenly distributed in the area where the target wind turbine is located in a uniform manner to obtain each detection point corresponding to the target wind turbine. The wind speed at each detection point of the target wind turbine is monitored at each monitoring time point in the current monitoring period using an anemometer. This forms a set of wind speed data for the target wind turbine in the current monitoring period.

[0011] By monitoring the wind direction deviation angle of the target wind turbine at each monitoring time point during the current monitoring period using a wind vane, a data set of wind direction deviation angles of the target wind turbine during the current monitoring period is obtained.

[0012] Preferably, the wind condition value of the target wind turbine corresponding to the current monitoring period is analyzed to obtain the wind condition value of the target wind turbine corresponding to the current monitoring period. The specific analysis method is as follows:

[0013] Extract the wind speed data of each monitoring point of the target wind turbine corresponding to the current monitoring period from the wind speed data set of the target wind turbine. Arrange the wind speeds of each monitoring time point of the target wind turbine in descending order to obtain the wind speed sequence of each monitoring point of the target wind turbine corresponding to the current monitoring period. From this sequence, select the maximum wind speed, minimum wind speed, mode wind speed, and median wind speed of each monitoring point of the target wind turbine corresponding to the current monitoring period, and label them as FV respectively. i max FV i min FV i mod FV i med , where i represents the number of each detection point, i=1,2,...,n, and n represents the total number of detection point numbers;

[0014] The average wind speed FJ at each monitoring point of the target wind turbine during the current monitoring period was calculated. i :

[0015] FV0 represents the set reference wind speed, and a1, a2, a3, and a4 represent the influence factors of the maximum wind speed, minimum wind speed, mode wind speed, and median wind speed corresponding to the set detection points, respectively.

[0016] The wind speeds at each monitoring point of the target wind turbine are arranged in descending order to obtain a wind speed sequence for each monitoring time point within the current monitoring period. The maximum, minimum, mode, and median wind speeds for each monitoring time point within the target wind turbine are then extracted from this sequence and labeled as fv. j max 、fv j min 、fv j mod 、fv j med j represents the number of each monitoring time point, j=1,2,...,m, and m represents the total number of the monitoring time point numbers;

[0017] The average wind speed FY of the target wind turbine at each monitoring time point in the current monitoring period was obtained by calculation. j :

[0018] a5, a6, a7, and a8 represent the influence factors of the maximum wind speed, minimum wind speed, mode wind speed, and median wind speed at the set monitoring time points, respectively.

[0019] According to the formula Calculate the wind variation value FB of the target wind turbine corresponding to the current monitoring period, where e represents the natural constant, and a9 and a10 represent the average wind speed value of each detection point corresponding to the current monitoring period and the weighting factor corresponding to the average wind speed value of each monitoring time point in the current monitoring period, respectively.

[0020] Extract the wind direction deviation angle of the target wind turbine at each monitoring time point during the current monitoring period from the wind direction deviation angle data set corresponding to the current monitoring period, and mark them as follows: Simultaneously, the mean value is calculated to obtain the mean wind direction deviation angle of the target wind turbine corresponding to the current monitoring period. According to the formula The standard deviation of the wind direction deviation angle of the target wind turbine corresponding to the current monitoring period was calculated. ;

[0021] According to the formula Calculate the wind condition value FK corresponding to the target wind turbine during the current monitoring period, where b1 and b2 represent the set scaling factors.

[0022] The unit operation monitoring and analysis module is used to monitor the unit operation status of the target wind turbine during the current monitoring period, obtain the unit operation status parameters of the target wind turbine during the current monitoring period, and analyze the unit operation health value of the target wind turbine during the current monitoring period to obtain the unit operation health value of the target wind turbine during the current monitoring period.

[0023] Preferably, the operating status of the target wind turbine during the current monitoring period is monitored to obtain the operating status parameters of the target wind turbine during the current monitoring period. Based on this, the operating health value of the target wind turbine during the current monitoring period is analyzed to obtain the operating health value of the target wind turbine during the current monitoring period. The specific steps are as follows:

[0024] The rotor speed, generator speed, and nacelle vibration amplitude of the target wind turbine are collected at each monitoring time point during the current monitoring period. Thresholds YX1, YX2, and YX3 for exceeding the limits of rotor speed, generator speed, and nacelle vibration amplitude are set respectively. The rotor speed, generator speed, and nacelle vibration amplitude of the target wind turbine at each monitoring time point during the current monitoring period are compared and analyzed with the preset thresholds YX1, YX2, and YX3 for exceeding the limits of rotor speed, generator speed, and nacelle vibration amplitude.

[0025] If the rotor speed of the target wind turbine at each monitoring time point in the current monitoring period is less than or equal to the preset rotor speed, then the rotor speed at that monitoring time point is assigned the value S1. If the rotor speed of the target wind turbine at each monitoring time point in the current monitoring period is greater than the preset rotor speed, then the rotor speed at that monitoring time point is assigned the value S2, where S1 > S2.

[0026] This data yields the number of monitoring time points with rotor speed assigned the value of S1 and the number of monitoring time points with rotor speed assigned the value of S2 for the target wind turbine during the current monitoring period, which are then labeled A1 and A2, respectively.

[0027] If the generator speed of the target wind turbine is less than or equal to the preset generator speed at each monitoring time point in the current monitoring period, the generator speed at that monitoring time point is assigned the value X1. If the generator speed of the target wind turbine is greater than the preset generator speed at each monitoring time point in the current monitoring period, the generator speed at that monitoring time point is assigned the value X2, where X1 > X2.

[0028] The number of monitoring time points with generator speed assigned the value of X1 and the number of monitoring time points with generator speed assigned the value of X2 for the target wind turbine in the current monitoring period are obtained from the statistics and are marked as B1 and B2 respectively.

[0029] If the nacelle vibration amplitude of the target wind turbine at each monitoring time point in the current monitoring period is less than or equal to the preset nacelle vibration amplitude, then the nacelle vibration amplitude at that monitoring time point is assigned the value Y1; if the nacelle vibration amplitude of the target wind turbine at each monitoring time point in the current monitoring period is greater than the preset nacelle vibration amplitude, then the nacelle vibration amplitude at that monitoring time point is assigned the value Y2, where Y1 > Y2.

[0030] The number of monitoring time points with nacelle vibration amplitude assigned the value of Y1 and the number of monitoring time points with nacelle vibration amplitude assigned the value of Y2 in the current monitoring period corresponding to the target wind turbine were obtained from the statistics and were marked as C1 and C2 respectively.

[0031] Therefore, the rotor speed control value VK1 of the target wind turbine for the current monitoring period is calculated:

[0032] e1 and e2 represent the set weighting factors, respectively;

[0033] The generator speed control value VK2 of the target wind turbine for the current monitoring period is obtained through calculation:

[0034] e3 and e4 represent the set weighting factors, respectively;

[0035] The nacelle vibration resistance value ZK for the target wind turbine during the current monitoring period was calculated.

[0036] e5 and e6 represent the set weighting factors, respectively;

[0037] Obtain the temperature of each component of the target wind turbine at each monitoring time point during the current monitoring period, and mark them as WD. j k k represents the component number, k=1,2,...,l, where l represents the total number of component numbers. Components of the unit include, but are not limited to, generators, converters, and gearboxes. The temperature and humidity value WK of the target wind turbine corresponding to the current monitoring period is obtained through analysis.

[0038] , This is represented as the set reference temperature. Represented as natural constants;

[0039] According to the formula Calculate the unit operation and health value YK of the target wind turbine for the current monitoring period, where f1, f2, f3, and f4 represent the set coefficient factors.

[0040] The pitch operation monitoring and analysis module is used to monitor the pitch operation status of the target wind turbine during the current monitoring period, obtain the pitch operation status parameters of the target wind turbine during the current monitoring period, and analyze the pitch operation status evaluation value of the target wind turbine during the current monitoring period to obtain the pitch operation status evaluation value of the target wind turbine.

[0041] Preferably, the pitch operation status of the target wind turbine during the current monitoring period is monitored to obtain the pitch operation status parameters of the target wind turbine during the current monitoring period. The pitch status evaluation value of the target wind turbine during the current monitoring period is then analyzed to obtain the corresponding pitch status evaluation value of the target wind turbine. The specific steps are as follows:

[0042] The actual pitch angle of the target wind turbine at each monitoring time point in the current monitoring period is monitored by an angle sensor, and the actual pitch angle of the target wind turbine at each monitoring time point in the current monitoring period is obtained.

[0043] The target wind turbine is plotted on the two-dimensional dynamic coordinate system with each monitoring time point in the current monitoring period as the abscissa and the actual pitch angle of the target wind turbine at each monitoring time point in the current monitoring period as the ordinate, so as to obtain the fluctuation diagram of the actual pitch angle of the target wind turbine in the current monitoring period.

[0044] By obtaining the actual pitch angles of two adjacent monitoring time points corresponding to the target wind turbine in the current monitoring period, and performing a difference analysis, the fluctuation difference of each actual pitch angle of the target wind turbine in the current monitoring period is obtained.

[0045] Set a comparison threshold Yu for the actual pitch angle fluctuation difference, and compare and analyze the actual pitch angle fluctuation difference of the target wind turbine corresponding to the current monitoring period with the preset comparison threshold Yu for the actual pitch angle fluctuation difference.

[0046] When the actual pitch angle fluctuation difference of the target wind turbine corresponding to the current monitoring period is greater than the preset comparison threshold Yu of the actual pitch angle fluctuation difference, an abnormal pitch angle fluctuation signal is generated; otherwise, a normal pitch angle fluctuation signal is generated. The number of abnormal pitch angle fluctuation signals and the number of normal pitch angle fluctuation signals of the target wind turbine corresponding to the current monitoring period are obtained by counting, and they are labeled as N1 and N2 respectively.

[0047] According to the formula Calculate the pitch stability value JW of the target wind turbine for the current monitoring period, where c1 and c2 are the set weighting factors.

[0048] The time points of each pitch control command issued and the time points of actual pitch angle changes for the target wind turbine during the current monitoring period are obtained from the database. These are then subjected to a difference analysis to obtain the pitch response time of the target wind turbine during the current monitoring period, denoted as T. f f represents the number of each occurrence, f=1,2,...,g, and g represents the total number of occurrences.

[0049] According to the formula The pitch status evaluation value JP of the target wind turbine corresponding to the current monitoring period is calculated. T0 represents the set reference pitch response time, and d1 and d2 represent the set evaluation factors, respectively.

[0050] The coordinated optimization control analysis module is used to analyze the pitch coordinated optimization control parameters of the target wind turbine for the current monitoring period based on the wind condition value, turbine operation value, and pitch status evaluation value of the target wind turbine for the current monitoring period, and obtain the pitch coordinated optimization control parameters of the target wind turbine for the current monitoring period.

[0051] Preferably, the pitch coordination optimization control parameters of the target wind turbine corresponding to the current monitoring period are analyzed. The specific analysis method is as follows:

[0052] The wind condition value of the target wind turbine corresponding to the current monitoring period is matched with the wind condition value threshold corresponding to each set pitch angle target value to obtain the pitch angle target value of the target wind turbine corresponding to the current monitoring period.

[0053] The difference between the target pitch angle value and the actual pitch angle value of the target wind turbine corresponding to the current monitoring period is obtained, and this difference is used as the pitch angle control parameter of the target wind turbine corresponding to the current monitoring period.

[0054] The system compares the operating health value of the target wind turbine for the current monitoring period with the set reference operating health value threshold. If the operating health value of the target wind turbine for the current monitoring period is greater than the set reference operating health value threshold, the operating parameters of the target wind turbine for the current monitoring period are determined to be normal. Otherwise, the operating parameters of the target wind turbine for the current monitoring period are determined to be abnormal.

[0055] The pitch status evaluation value of the target wind turbine corresponding to the current monitoring period is compared with the set reference pitch status evaluation value threshold. If the pitch status evaluation value of the target wind turbine corresponding to the current monitoring period is greater than the set reference pitch status evaluation value threshold, the pitch operation parameters of the target wind turbine corresponding to the current monitoring period are determined to be normal. Otherwise, the pitch operation parameters of the target wind turbine corresponding to the current monitoring period are determined to be abnormal.

[0056] The pitch angle control parameters, turbine operating parameters, and pitch operation parameters of the target wind turbine for the current monitoring period constitute the pitch coordination and optimization control parameters of the target wind turbine for the current monitoring period.

[0057] The execution terminal performs corresponding operations based on the pitch coordination optimization control parameters of the target wind turbine for the current monitoring period.

[0058] The database is used to store the time points when pitch control commands are issued for each target wind turbine during the current monitoring period, as well as the time points when the actual pitch angle changes.

[0059] The beneficial effects of this invention are:

[0060] This invention monitors the wind condition parameters, turbine operating parameters, and pitch control parameters of the target wind turbine during the current monitoring period. It then analyzes these parameters to obtain the wind condition value, turbine operating value, and pitch status assessment value for the target wind turbine during the current monitoring period. This analysis further examines the rationality of the pitch angle setting for the target wind turbine during the current monitoring period, the turbine's operating status, and the operating status of the pitch control system itself. On one hand, by monitoring changes in wind conditions in real time, the invention dynamically adjusts the pitch angle of the wind turbine to adapt to constantly changing natural environmental conditions and optimize the wind turbine's output power, thereby improving the wind turbine's operating efficiency and safety. On the other hand, it can promptly detect potential faults or anomalies in the wind turbine, as well as the performance and stability of the pitch control system, enabling corresponding repair or prevention measures to ensure normal operation. Attached Figure Description

[0061] The invention will now be further described with reference to the accompanying drawings.

[0062] Figure 1 This is a system block diagram of the present invention. Detailed Implementation

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

[0064] Please see Figure 1 As shown, this invention is a pitch coordination optimization control system for wind turbine generators, including...

[0065] The wind condition monitoring and analysis module is used to monitor the wind conditions of the target wind turbine during the current monitoring period and obtain the wind condition parameters of the target wind turbine during the current monitoring period. The specific monitoring method is as follows:

[0066] Detection points are evenly distributed in the area where the target wind turbine is located in a uniform manner to obtain each detection point corresponding to the target wind turbine. The wind speed at each detection point of the target wind turbine is monitored at each monitoring time point in the current monitoring period using an anemometer. This forms a set of wind speed data for the target wind turbine in the current monitoring period.

[0067] By monitoring the wind direction deviation angle of the target wind turbine at each monitoring time point during the current monitoring period using a wind vane, a data set of wind direction deviation angles of the target wind turbine during the current monitoring period is obtained.

[0068] Therefore, the wind condition values ​​for the target wind turbine during the current monitoring period are analyzed to obtain the wind condition values ​​for the target wind turbine during the current monitoring period. The specific analysis method is as follows:

[0069] Extract the wind speed data of each monitoring point of the target wind turbine corresponding to the current monitoring period from the wind speed data set of the target wind turbine. Arrange the wind speeds of each monitoring time point of the target wind turbine in descending order to obtain the wind speed sequence of each monitoring point of the target wind turbine corresponding to the current monitoring period. From this sequence, select the maximum wind speed, minimum wind speed, mode wind speed, and median wind speed of each monitoring point of the target wind turbine corresponding to the current monitoring period, and label them as FV respectively. i max FV i min FV i mod FV i med , where i represents the number of each detection point, i=1,2,...,n, and n represents the total number of detection point numbers;

[0070] The average wind speed FJ at each monitoring point of the target wind turbine during the current monitoring period was calculated. i :

[0071] FV0 represents the set reference wind speed, and a1, a2, a3, and a4 represent the influence factors of the maximum wind speed, minimum wind speed, mode wind speed, and median wind speed corresponding to the set detection points, respectively.

[0072] The wind speeds at each monitoring point of the target wind turbine are arranged in descending order to obtain a wind speed sequence for each monitoring time point within the current monitoring period. The maximum, minimum, mode, and median wind speeds for each monitoring time point within the target wind turbine are then extracted from this sequence and labeled as fv. j max 、fv j min 、fv j mod 、fv j med j represents the number of each monitoring time point, j=1,2,...,m, and m represents the total number of the monitoring time point numbers;

[0073] The average wind speed FY of the target wind turbine at each monitoring time point in the current monitoring period was obtained by calculation. j :

[0074] a5, a6, a7, and a8 represent the influence factors of the maximum wind speed, minimum wind speed, mode wind speed, and median wind speed at the set monitoring time points, respectively.

[0075] According to the formula Calculate the wind variation value FB of the target wind turbine corresponding to the current monitoring period, where e represents the natural constant, and a9 and a10 represent the average wind speed value of each detection point corresponding to the current monitoring period and the weighting factor corresponding to the average wind speed value of each monitoring time point in the current monitoring period, respectively.

[0076] Extract the wind direction deviation angle of the target wind turbine at each monitoring time point during the current monitoring period from the wind direction deviation angle data set corresponding to the current monitoring period, and mark them as follows: Simultaneously, the mean value is calculated to obtain the mean wind direction deviation angle of the target wind turbine corresponding to the current monitoring period. According to the formula The standard deviation of the wind direction deviation angle of the target wind turbine corresponding to the current monitoring period was calculated. ;

[0077] According to the formula Calculate the wind condition value FK corresponding to the target wind turbine during the current monitoring period, where b1 and b2 represent the set scaling factors.

[0078] The unit operation monitoring and analysis module monitors the operating status of the target wind turbine during the current monitoring period, obtains the unit operating status parameters of the target wind turbine during the current monitoring period, and analyzes the unit operation and health value of the target wind turbine during the current monitoring period to obtain the unit operation and health value of the target wind turbine during the current monitoring period. The specific process steps are as follows:

[0079] The rotor speed, generator speed, and nacelle vibration amplitude of the target wind turbine are collected at each monitoring time point during the current monitoring period. Thresholds YX1, YX2, and YX3 for exceeding the limits of rotor speed, generator speed, and nacelle vibration amplitude are set respectively. The rotor speed, generator speed, and nacelle vibration amplitude of the target wind turbine at each monitoring time point during the current monitoring period are compared and analyzed with the preset thresholds YX1, YX2, and YX3 for exceeding the limits of rotor speed, generator speed, and nacelle vibration amplitude.

[0080] If the rotor speed of the target wind turbine at each monitoring time point in the current monitoring period is less than or equal to the preset rotor speed, then the rotor speed at that monitoring time point is assigned the value S1. If the rotor speed of the target wind turbine at each monitoring time point in the current monitoring period is greater than the preset rotor speed, then the rotor speed at that monitoring time point is assigned the value S2, where S1 > S2.

[0081] This data yields the number of monitoring time points with rotor speed assigned the value of S1 and the number of monitoring time points with rotor speed assigned the value of S2 for the target wind turbine during the current monitoring period, which are then labeled A1 and A2, respectively.

[0082] If the generator speed of the target wind turbine is less than or equal to the preset generator speed at each monitoring time point in the current monitoring period, the generator speed at that monitoring time point is assigned the value X1. If the generator speed of the target wind turbine is greater than the preset generator speed at each monitoring time point in the current monitoring period, the generator speed at that monitoring time point is assigned the value X2, where X1 > X2.

[0083] This data yields the number of monitoring time points with generator speed assigned the value of X1 and the number of monitoring time points with generator speed assigned the value of X2 for the target wind turbine during the current monitoring period, which are then labeled as B1 and B2, respectively.

[0084] If the nacelle vibration amplitude of the target wind turbine at each monitoring time point in the current monitoring period is less than or equal to the preset nacelle vibration amplitude, then the nacelle vibration amplitude at that monitoring time point is assigned the value Y1; if the nacelle vibration amplitude of the target wind turbine at each monitoring time point in the current monitoring period is greater than the preset nacelle vibration amplitude, then the nacelle vibration amplitude at that monitoring time point is assigned the value Y2, where Y1 > Y2.

[0085] The number of monitoring time points with nacelle vibration amplitude assigned the value of Y1 and the number of monitoring time points with nacelle vibration amplitude assigned the value of Y2 for the target wind turbine in the current monitoring period are obtained from the statistics and are marked as C1 and C2 respectively;

[0086] Therefore, the rotor speed control value VK1 of the target wind turbine for the current monitoring period is calculated:

[0087] e1 and e2 represent the set weighting factors, respectively;

[0088] The generator speed control value VK2 of the target wind turbine for the current monitoring period is obtained through calculation:

[0089] e3 and e4 represent the set weighting factors, respectively;

[0090] The nacelle vibration resistance value ZK for the target wind turbine during the current monitoring period was calculated.

[0091] e5 and e6 represent the set weighting factors, respectively;

[0092] Obtain the temperature of each component of the target wind turbine at each monitoring time point during the current monitoring period, and mark them as WD. j k k represents the component number, k=1,2,...,l, where l represents the total number of component numbers. Components of the unit include, but are not limited to, generators, converters, and gearboxes. The temperature and humidity value WK of the target wind turbine corresponding to the current monitoring period is obtained through analysis.

[0093] , This is represented as the set reference temperature. Represented as natural constants;

[0094] According to the formula Calculate the unit operation and health value YK of the target wind turbine for the current monitoring period, where f1, f2, f3, and f4 represent the set coefficient factors.

[0095] The pitch operation monitoring and analysis module is used to monitor the pitch operation status of the target wind turbine during the current monitoring period, obtain the pitch operation status parameters of the target wind turbine during the current monitoring period, and analyze the pitch status evaluation value of the target wind turbine during the current monitoring period to obtain the corresponding pitch status evaluation value of the target wind turbine. The specific process steps are as follows:

[0096] The actual pitch angle of the target wind turbine at each monitoring time point in the current monitoring period is monitored by an angle sensor, and the actual pitch angle of the target wind turbine at each monitoring time point in the current monitoring period is obtained.

[0097] The target wind turbine is plotted on the two-dimensional dynamic coordinate system with each monitoring time point in the current monitoring period as the abscissa and the actual pitch angle of the target wind turbine at each monitoring time point in the current monitoring period as the ordinate, so as to obtain the fluctuation diagram of the actual pitch angle of the target wind turbine in the current monitoring period.

[0098] By obtaining the actual pitch angles of two adjacent monitoring time points corresponding to the target wind turbine in the current monitoring period, and performing a difference analysis, the fluctuation difference of each actual pitch angle of the target wind turbine in the current monitoring period is obtained.

[0099] Set a comparison threshold Yu for the actual pitch angle fluctuation difference, and compare and analyze the actual pitch angle fluctuation difference of the target wind turbine corresponding to the current monitoring period with the preset comparison threshold Yu for the actual pitch angle fluctuation difference.

[0100] When the actual pitch angle fluctuation difference of the target wind turbine corresponding to the current monitoring period is greater than the preset comparison threshold Yu of the actual pitch angle fluctuation difference, an abnormal pitch angle fluctuation signal is generated; otherwise, a normal pitch angle fluctuation signal is generated. The number of abnormal pitch angle fluctuation signals and the number of normal pitch angle fluctuation signals of the target wind turbine corresponding to the current monitoring period are obtained by counting, and they are labeled as N1 and N2 respectively.

[0101] According to the formula Calculate the pitch stability value JW of the target wind turbine for the current monitoring period, where c1 and c2 are the set weighting factors.

[0102] The time points of each pitch control command issued and the time points of actual pitch angle changes for the target wind turbine during the current monitoring period are obtained from the database. These are then subjected to a difference analysis to obtain the pitch response time of the target wind turbine during the current monitoring period, denoted as T. f f represents the number of each occurrence, f=1,2,...,g, and g represents the total number of occurrences.

[0103] According to the formula The pitch status evaluation value JP of the target wind turbine corresponding to the current monitoring period is calculated. T0 represents the set reference pitch response time, and d1 and d2 represent the set evaluation factors, respectively.

[0104] The coordinated optimization control analysis module is used to analyze the coordinated optimization control parameters of the pitch of the target wind turbine for the current monitoring period based on the wind condition value, turbine operation value, and pitch status evaluation value of the target wind turbine. The specific analysis method is as follows:

[0105] The wind condition value of the target wind turbine corresponding to the current monitoring period is matched with the wind condition value threshold corresponding to each set pitch angle target value to obtain the pitch angle target value of the target wind turbine corresponding to the current monitoring period.

[0106] The difference between the target pitch angle value and the actual pitch angle value of the target wind turbine corresponding to the current monitoring period is obtained, and this difference is used as the pitch angle control parameter of the target wind turbine corresponding to the current monitoring period.

[0107] The system compares the operating health value of the target wind turbine for the current monitoring period with the set reference operating health value threshold. If the operating health value of the target wind turbine for the current monitoring period is greater than the set reference operating health value threshold, the operating parameters of the target wind turbine for the current monitoring period are determined to be normal. Otherwise, the operating parameters of the target wind turbine for the current monitoring period are determined to be abnormal.

[0108] The pitch status evaluation value of the target wind turbine corresponding to the current monitoring period is compared with the set reference pitch status evaluation value threshold. If the pitch status evaluation value of the target wind turbine corresponding to the current monitoring period is greater than the set reference pitch status evaluation value threshold, the pitch operation parameters of the target wind turbine corresponding to the current monitoring period are determined to be normal. Otherwise, the pitch operation parameters of the target wind turbine corresponding to the current monitoring period are determined to be abnormal.

[0109] The pitch angle control parameters, turbine operating parameters, and pitch operation parameters of the target wind turbine for the current monitoring period constitute the pitch coordination and optimization control parameters of the target wind turbine for the current monitoring period.

[0110] The execution terminal performs corresponding operations based on the pitch coordination optimization control parameters of the target wind turbine for the current monitoring period.

[0111] In a specific embodiment, if the pitch angle difference of the target wind turbine corresponding to the current monitoring period is 0, then the pitch angle control parameter of the target wind turbine corresponding to the current monitoring period is not controlled. For example, if the pitch angle status of the target wind turbine corresponding to the current monitoring period is good, it is not controlled, and the pitch angle status of the target wind turbine is displayed with a green light, indicating that the pitch angle status of the target wind turbine is good.

[0112] If the pitch angle difference of the target wind turbine corresponding to the current monitoring period is not 0, the pitch angle difference of the target wind turbine corresponding to the current monitoring period will be displayed accordingly, and the pitch angle status of the target wind turbine will be displayed with a flashing red light to remind relevant personnel to make timely pitch angle adjustments.

[0113] If the operating parameters of the target wind turbine are normal during the current monitoring period, then the operating control parameters of the target wind turbine during the current monitoring period will not be controlled. For example, if the operating status of the target wind turbine during the current monitoring period is good, no control will be made, and the operating status of the target wind turbine will be displayed with a green light, indicating that the operating status of the target wind turbine is good.

[0114] If the operating parameters of the target wind turbine are abnormal during the current monitoring period, the operating status of the target wind turbine will be displayed by flashing a red light to remind relevant personnel to perform timely operation, maintenance and repair of the turbine.

[0115] If the pitch operation parameters of the target wind turbine are normal for the current monitoring period, then the pitch operation control parameters of the target wind turbine for the current monitoring period will not be controlled. For example, if the pitch operation status of the target wind turbine for the current monitoring period is good, no control will be made, and the pitch operation status of the target wind turbine will be displayed with a green light, indicating that the pitch operation status of the target wind turbine is good.

[0116] If the pitch operation parameters of the target wind turbine are abnormal during the current monitoring period, a red light will flash to indicate the pitch operation status of the target wind turbine, so as to remind relevant personnel to perform timely pitch operation maintenance and repair.

[0117] The database is used to store the time points when pitch control commands are issued for each target wind turbine during the current monitoring period, as well as the time points when the actual pitch angle changes.

[0118] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A pitch coordination optimization control system for a wind turbine generator, characterized in that, include: The wind condition monitoring and analysis module is used to monitor the wind condition of the target wind turbine during the current monitoring period, obtain the wind condition parameters of the target wind turbine during the current monitoring period, and analyze the wind condition value of the target wind turbine during the current monitoring period. The analysis of the wind condition values ​​for the target wind turbine during the current monitoring period yields the specific analysis method as follows: Extract the wind speed data of each monitoring point of the target wind turbine corresponding to the current monitoring period from the wind speed data set of the target wind turbine. Arrange the wind speeds of each monitoring time point of the target wind turbine in descending order to obtain the wind speed sequence of each monitoring point of the target wind turbine corresponding to the current monitoring period. From this sequence, select the maximum wind speed, minimum wind speed, mode wind speed, and median wind speed of each monitoring point of the target wind turbine corresponding to the current monitoring period, and label them as FV respectively. i max FV i min FV i mod FV i med , where i represents the number of each detection point, i=1,2,...,n, and n represents the total number of detection point numbers; The average wind speed FJ at each monitoring point of the target wind turbine during the current monitoring period was calculated. i ; The wind speeds at each monitoring point of the target wind turbine are arranged in descending order to obtain a wind speed sequence for each monitoring time point within the current monitoring period. The maximum, minimum, mode, and median wind speeds for each monitoring time point within the target wind turbine are then extracted from this sequence and labeled as fv. j max 、fv j min 、fv j mod 、fv j med j represents the number of each monitoring time point, j=1,2,...,m, and m represents the total number of the monitoring time point numbers; The average wind speed FY of the target wind turbine at each monitoring time point in the current monitoring period was obtained by calculation. j ; According to the formula Calculate the wind variation value FB of the target wind turbine corresponding to the current monitoring period, where e represents the natural constant, and a9 and a10 represent the average wind speed value of each detection point corresponding to the current monitoring period and the weighting factor corresponding to the average wind speed value of each monitoring time point in the current monitoring period, respectively. Extract the wind direction deviation angle of the target wind turbine at each monitoring time point during the current monitoring period from the wind direction deviation angle data set corresponding to the current monitoring period, and mark them as follows: Simultaneously, the mean value is calculated to obtain the mean wind direction deviation angle of the target wind turbine corresponding to the current monitoring period. According to the formula The standard deviation of the wind direction deviation angle of the target wind turbine corresponding to the current monitoring period was calculated. ; According to the formula Calculate the wind condition value FK corresponding to the target wind turbine during the current monitoring period, where b1 and b2 represent the set scaling factors. The unit operation monitoring and analysis module is used to monitor the unit operation status of the target wind turbine during the current monitoring period, obtain the unit operation status parameters of the target wind turbine during the current monitoring period, and analyze the unit operation health value of the target wind turbine during the current monitoring period to obtain the unit operation health value of the target wind turbine during the current monitoring period. The process involves monitoring the operating status of the target wind turbine during the current monitoring period to obtain its operating status parameters, and then analyzing the turbine's operational health value to obtain the overall operational health value. The specific steps are as follows: The rotor speed, generator speed, and nacelle vibration amplitude of the target wind turbine are collected at each monitoring time point during the current monitoring period. Thresholds YX1, YX2, and YX3 for exceeding the limits of rotor speed, generator speed, and nacelle vibration amplitude are set respectively. The rotor speed, generator speed, and nacelle vibration amplitude of the target wind turbine at each monitoring time point during the current monitoring period are compared and analyzed with the preset thresholds YX1, YX2, and YX3 for exceeding the limits of rotor speed, generator speed, and nacelle vibration amplitude. If the rotor speed of the target wind turbine at each monitoring time point in the current monitoring period is less than or equal to the preset rotor speed, then the rotor speed at that monitoring time point is assigned the value S1. If the rotor speed of the target wind turbine at each monitoring time point in the current monitoring period is greater than the preset rotor speed, then the rotor speed at that monitoring time point is assigned the value S2, where S1 > S2. This data yields the number of monitoring time points with rotor speed assigned the value of S1 and the number of monitoring time points with rotor speed assigned the value of S2 for the target wind turbine during the current monitoring period, which are then labeled A1 and A2, respectively. If the generator speed of the target wind turbine is less than or equal to the preset generator speed at each monitoring time point in the current monitoring period, the generator speed at that monitoring time point is assigned the value X1. If the generator speed of the target wind turbine is greater than the preset generator speed at each monitoring time point in the current monitoring period, the generator speed at that monitoring time point is assigned the value X2, where X1 > X2. The number of monitoring time points with generator speed assigned the value of X1 and the number of monitoring time points with generator speed assigned the value of X2 for the target wind turbine in the current monitoring period are obtained from the statistics and are marked as B1 and B2 respectively. If the nacelle vibration amplitude of the target wind turbine at each monitoring time point in the current monitoring period is less than or equal to the preset nacelle vibration amplitude, then the nacelle vibration amplitude at that monitoring time point is assigned the value Y1; if the nacelle vibration amplitude of the target wind turbine at each monitoring time point in the current monitoring period is greater than the preset nacelle vibration amplitude, then the nacelle vibration amplitude at that monitoring time point is assigned the value Y2, where Y1 > Y2. The number of monitoring time points with nacelle vibration amplitude assigned the value of Y1 and the number of monitoring time points with nacelle vibration amplitude assigned the value of Y2 in the current monitoring period corresponding to the target wind turbine were obtained from the statistics and were marked as C1 and C2 respectively. Therefore, the rotor speed compensability value VK1, generator speed compensability value VK2, and nacelle vibration compensability value ZK of the target wind turbine corresponding to the current monitoring period are obtained by calculation. Obtain the temperature of each component of the target wind turbine at each monitoring time point during the current monitoring period, and mark them as WD. j k k represents the number of each component, k=1,2,...,l, and l represents the total number of component numbers. The temperature and humidity value WK of the target wind turbine corresponding to the current monitoring period is obtained through analysis. According to the formula Calculate the unit operation and health value YK of the target wind turbine for the current monitoring period, where f1, f2, f3, and f4 represent the set coefficient factors; The pitch operation monitoring and analysis module is used to monitor the pitch operation status of the target wind turbine during the current monitoring period, obtain the pitch operation status parameters of the target wind turbine during the current monitoring period, and analyze the pitch status evaluation value of the target wind turbine during the current monitoring period to obtain the pitch status evaluation value of the target wind turbine. The process involves monitoring the pitch operation status of the target wind turbine during the current monitoring period to obtain pitch operation status parameters for the target wind turbine during the current monitoring period. Based on these parameters, the pitch operation status evaluation value for the target wind turbine during the current monitoring period is analyzed to obtain the corresponding pitch operation status evaluation value. The specific steps are as follows: The actual pitch angle of the target wind turbine at each monitoring time point in the current monitoring period is monitored by an angle sensor, and the actual pitch angle of the target wind turbine at each monitoring time point in the current monitoring period is obtained. The target wind turbine is plotted on the two-dimensional dynamic coordinate system with each monitoring time point in the current monitoring period as the abscissa and the actual pitch angle of the target wind turbine at each monitoring time point in the current monitoring period as the ordinate, so as to obtain the fluctuation diagram of the actual pitch angle of the target wind turbine in the current monitoring period. By obtaining the actual pitch angles of two adjacent monitoring time points corresponding to the target wind turbine in the current monitoring period, and performing a difference analysis, the fluctuation difference of each actual pitch angle of the target wind turbine in the current monitoring period is obtained. Set a comparison threshold Yu for the actual pitch angle fluctuation difference, and compare and analyze the actual pitch angle fluctuation difference of the target wind turbine corresponding to the current monitoring period with the preset comparison threshold Yu for the actual pitch angle fluctuation difference. When the actual pitch angle fluctuation difference of the target wind turbine in the current monitoring period is greater than the preset comparison threshold Yu for the actual pitch angle fluctuation difference, an abnormal pitch angle fluctuation signal is generated; otherwise, a normal pitch angle fluctuation signal is generated. The number of abnormal pitch angle fluctuation signals and the number of normal pitch angle fluctuation signals of the target wind turbine in the current monitoring period are obtained by counting. The pitch stability value JW of the target wind turbine in the current monitoring period is calculated. The time points of each pitch control command issued and the time points of actual pitch angle changes for the target wind turbine during the current monitoring period are obtained from the database. These are then subjected to a difference analysis to obtain the pitch response time of the target wind turbine during the current monitoring period, denoted as T. f f represents the number of each occurrence, f=1,2,...,g, and g represents the total number of occurrences. According to the formula Calculate the pitch status evaluation value JP of the target wind turbine corresponding to the current monitoring period, where T0 represents the set reference pitch response time, and d1 and d2 represent the set evaluation factors, respectively. The coordinated optimization control analysis module is used to analyze the pitch coordinated optimization control parameters of the target wind turbine for the current monitoring period based on the wind condition value, turbine operation value, and pitch status evaluation value of the target wind turbine for the current monitoring period, and obtain the pitch coordinated optimization control parameters of the target wind turbine for the current monitoring period. The execution terminal performs corresponding operations based on the pitch coordination optimization control parameters of the target wind turbine for the current monitoring period. The database is used to store the time points when pitch control commands are issued for each target wind turbine during the current monitoring period, as well as the time points when the actual pitch angle changes.

2. The pitch coordination optimization control system for a wind turbine generator according to claim 1, characterized in that, The wind conditions of the target wind turbine during the current monitoring period are monitored to obtain the wind condition parameters of the target wind turbine during the current monitoring period. The specific monitoring method is as follows: Detection points are evenly distributed in the area where the target wind turbine is located in a uniform manner to obtain each detection point corresponding to the target wind turbine. The wind speed at each detection point of the target wind turbine is monitored at each monitoring time point in the current monitoring period using an anemometer. This forms a set of wind speed data for the target wind turbine in the current monitoring period. By monitoring the wind direction deviation angle of the target wind turbine at each monitoring time point during the current monitoring period using a wind vane, a data set of wind direction deviation angles of the target wind turbine during the current monitoring period is obtained.

3. The pitch coordination optimization control system for a wind turbine generator according to claim 1, characterized in that, The analysis of the pitch coordination optimization control parameters of the target wind turbine for the current monitoring period is specifically performed as follows: The wind condition value of the target wind turbine corresponding to the current monitoring period is matched with the wind condition value threshold corresponding to each set pitch angle target value to obtain the pitch angle target value of the target wind turbine corresponding to the current monitoring period. The difference between the target pitch angle value and the actual pitch angle value of the target wind turbine corresponding to the current monitoring period is obtained, and this difference is used as the pitch angle control parameter of the target wind turbine corresponding to the current monitoring period. The system compares the operating health value of the target wind turbine for the current monitoring period with the set reference operating health value threshold. If the operating health value of the target wind turbine for the current monitoring period is greater than the set reference operating health value threshold, the operating parameters of the target wind turbine for the current monitoring period are determined to be normal. Otherwise, the operating parameters of the target wind turbine for the current monitoring period are determined to be abnormal. The pitch status evaluation value of the target wind turbine corresponding to the current monitoring period is compared with the set reference pitch status evaluation value threshold. If the pitch status evaluation value of the target wind turbine corresponding to the current monitoring period is greater than the set reference pitch status evaluation value threshold, the pitch operation parameters of the target wind turbine corresponding to the current monitoring period are determined to be normal. Otherwise, the pitch operation parameters of the target wind turbine corresponding to the current monitoring period are determined to be abnormal. The pitch angle control parameters, turbine operating parameters, and pitch operation parameters of the target wind turbine for the current monitoring period constitute the pitch coordination and optimization control parameters of the target wind turbine for the current monitoring period.

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