Control method, system and equipment based on operation of wind turbine generator

Abstract

The invention discloses a control method, system and equipment based on wind turbine generator operation, and relates to the technical field of wind power generation control. The control method based on operation of the wind turbine generator comprises the following steps: acquiring a wind speed influence index; acquiring a power generation evaluation index; and obtaining a load evaluation index. The wind turbine generator data and the wind speed influence index are obtained by monitoring the wind turbine generator in real time, whether the wind speed influence index is larger than the preset wind speed evaluation threshold value or not is judged, and when the wind speed influence index is not larger than the preset wind speed evaluation threshold value, the power generation evaluation index is obtained and whether the power generation amount is adjusted or not is judged; when the wind speed influence index is larger than the preset wind speed evaluation threshold value, the load evaluation index is obtained, whether load adjustment is carried out or not is judged, the effect of improving the safety operation control accuracy of the wind turbine generator is achieved, and the problem that in the prior art, control over safety operation of the wind turbine generator is not accurate is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation control, and in particular to a control method, system and equipment based on the operation of a wind turbine generator set. Background Art

[0002] Wind power generation is the process of using wind energy to drive the wind turbine to rotate and drive the generator to generate electricity through the rotating rotor. In order to improve the power generation efficiency and reliability of wind turbines, their operation needs to be precisely controlled. This includes controlling the speed, blade angle and grid connection of wind turbines to optimize the utilization efficiency of wind energy and ensure the safety and stability of power transmission. The speed of wind turbines directly affects the output power of the generator and the stability of the grid. By controlling the speed, wind turbines can achieve the best power generation efficiency at different wind speeds. Speed ​​control technology usually adopts two methods: variable pitch control and variable frequency control. With the advancement of science and technology and the growth of demand, efficient wind power control technology is also constantly evolving and improving. For example, the use of artificial intelligence and big data analysis technology can realize intelligent wind power control and improve the adaptability and efficiency of generators. In addition, with the rapid development of the new energy industry and the increase in global demand for clean energy, wind power control technology will pay more attention to the development of innovation, efficiency and intelligence.

[0003] The existing methods are mainly based on adjusting the speed of wind turbines according to the change of wind speed. When the wind speed is low, the speed of wind turbines is low to ensure that the wind speed is sufficient for the unit to start; when the wind speed is high, the speed will gradually increase to improve the power generation efficiency of the wind turbine.

[0004] For example, the invention patent application with publication number: CN117072376A discloses an operation control method for a dual-rotor wind turbine, comprising: obtaining the rotation speed and pitch angle of the front and rear wind rotors of the dual-rotor wind turbine at the current wind speed; determining the target rotation speed and pitch angle of the front and rear wind rotors of the dual-rotor wind turbine at the current wind speed with the goal of maximizing the overall output power of the dual-rotor wind turbine; establishing linearized models based on state space for the front and rear wind rotor transmission chains respectively; based on the linearized models, introducing a state observer, an interference regulation controller and a quadratic regulator, designing the torque controller and pitch controller of the front and rear wind rotors, and realizing control of the front and rear wind rotors.

[0005] For example, the invention patent application with publication number: CN114483451A discloses a direct-drive wind turbine fan operation control method, including: collecting historical operation parameter information of the direct-drive wind turbine fan, and extracting the fan operation status information under different environments; judging the relevant parameter values ​​when the fan has an operation failure according to the fan operation status information under different environments; constructing a linear function model using the relevant parameter values; monitoring the real-time operation parameters of the direct-drive wind turbine fan, and when the deviation between the real-time operation parameters of the fan and the corresponding parameters in the linear function model is higher than a preset threshold, mobilizing the fan operation adjustment control mechanism to maintain the smooth operation of the direct-drive wind turbine fan.

[0006] However, in the process of implementing the technical solution of the invention in the embodiments of the present application, the present application found that the above technology has at least the following technical problems:

[0007] In the prior art, since the software architecture used in the wind farm control system is relatively old, on-site unit communication failures and module aging and damage failures occur frequently, and wind turbines cannot operate stably at rated wind speeds, resulting in inaccurate control of the safe operation of wind turbines. Summary of the invention

[0008] The embodiments of the present application solve the problem of inaccurate control of the safe operation of wind turbines in the prior art by providing a control method, system and device based on the operation of wind turbines, thereby improving the accuracy of controlling the safe operation of wind turbines.

[0009] An embodiment of the present application provides a control method based on the operation of a wind turbine, comprising the following steps: S1, real-time monitoring of the wind turbine through a preset sensor device to obtain wind turbine data, and obtaining a wind speed influence index based on the wind turbine data and reference wind turbine data, wherein the wind speed influence index is used to evaluate the degree of influence of wind speed on the safe operation of the wind turbine; S2, judging whether the wind speed influence index is greater than a preset wind speed assessment threshold, obtaining a power generation assessment index when the wind speed influence index is not greater than the preset wind speed assessment threshold, judging whether to adjust the power generation based on the power generation assessment index, wherein the power generation adjustment is used to adjust the power generation assessment index to not less than the preset power generation threshold, and the power generation assessment index is used to evaluate the power generation situation of the wind turbine; S3, obtaining a load assessment index when the wind speed influence index is greater than the preset wind speed assessment threshold, judging whether to adjust the load based on the load assessment index, wherein the load adjustment is used to adjust the load assessment index to not greater than the preset load threshold, and the load assessment index is used to evaluate the load situation of the wind turbine.

[0010] Furthermore, the specific process of real-time monitoring of the wind turbine group and obtaining wind turbine group data through the preset sensing device is as follows: the wind speed of the wind turbine group is measured by the deployed wind speed sensor, and the wind speed sensor is used to provide real-time wind speed information; the wind turbine group is measured by the deployed laser displacement sensor to obtain the impeller radius; the preset sensing device includes a wind speed sensor and a laser displacement sensor; the wind turbine group data includes the wind speed of the wind turbine group and the impeller radius; the impeller radius represents the distance from the rotation axis to the center point of the blade tip of the wind turbine group.

[0011] Furthermore, the specific process of obtaining the wind speed influence index based on the wind turbine data and the reference wind turbine data is as follows: the obtained wind turbine wind speed and the preset maximum wind speed threshold are ratio-calculated to obtain the wind speed deviation ratio; the initial aerodynamic damping force is obtained by combining the wind turbine wind speed, impeller radius, air density and drag coefficient, and the initial aerodynamic damping force is used to reflect the resistance generated by the wind turbine in the air; the initial aerodynamic damping force and the preset maximum damping force threshold are ratio-calculated to obtain the aerodynamic damping force deviation ratio; the wind speed influence index is obtained by combining the wind speed deviation ratio and the aerodynamic damping force deviation ratio; the reference wind turbine data includes the preset maximum damping force threshold, the preset maximum wind speed threshold, the air density and the drag coefficient.

[0012] Furthermore, the limiting expression of the wind speed impact index is as follows:

[0013] ;

[0014] ;

[0015] ;

[0016] In the formula, It represents the wind speed impact index of the wind turbine at the i-th preset time point, , i represents the number of the preset time point, k represents the total number of preset time points, It represents the wind speed deviation ratio of the wind turbine at the i-th preset time point, represents the aerodynamic damping force deviation ratio of the wind turbine at the i-th preset time point, represents the wind speed of the wind turbine at the i-th preset time point, represents the impeller radius of the wind turbine at the i-th preset time point, represents the air density, represents the drag coefficient, Indicates the preset maximum damping force threshold, represents the preset maximum wind speed threshold, and e represents a natural constant.

[0017] Furthermore, the specific process of obtaining the power generation evaluation index is as follows: an initial wind energy density is obtained by combining the obtained air density and wind speed of the wind turbine, and the initial wind energy density is used to reflect the power generation of the wind turbine; the initial wind energy density and the preset maximum wind energy density threshold are added to obtain an initial wind energy density deviation value, and the initial wind energy density deviation value is represented by the result of the addition of the initial wind energy density and the preset maximum wind energy density threshold; the initial wind energy density deviation value and 2 times the preset maximum wind energy density threshold are ratio-calculated to obtain a wind energy density deviation ratio, and the wind energy density deviation ratio is used to reflect the deviation of power generation of the wind turbine; the power generation evaluation index is obtained by combining the wind energy density deviation ratio and a wind speed influence index that is not greater than the preset wind speed evaluation threshold.

[0018] Furthermore, the specific process of obtaining the load assessment index is as follows: an initial wind load is obtained by combining the obtained air density, impeller radius, and wind speed of the wind turbine, and the initial wind load is used to reflect the pressure caused by air flow on the wind turbine; the initial wind load and a preset maximum load threshold are added to obtain an initial load deviation value, and the initial load deviation value is represented by the result of the addition operation of the initial wind load and the preset maximum load threshold; the initial load deviation value and twice the preset maximum load threshold are ratioed to obtain a load deviation ratio, and the load deviation ratio is used to reflect the pressure deviation caused by air flow on the wind turbine; the load assessment index is obtained by combining the load deviation ratio and a wind speed influence index greater than a preset wind speed assessment threshold.

[0019] The embodiment of the present application provides a control system based on the operation of a wind turbine, including a wind speed impact assessment module, a power generation assessment module and a load assessment module: wherein the wind speed impact assessment module is used to monitor the wind turbine in real time through a preset sensor device to obtain wind turbine data, and obtain a wind speed impact index based on the wind turbine data and reference wind turbine data, wherein the wind speed impact index is used to assess the degree of influence of wind speed on the safe operation of the wind turbine; the power generation assessment module is used to determine whether the wind speed impact index is greater than a preset wind speed assessment threshold, and when the wind speed impact index is not greater than the preset wind speed assessment threshold, obtain the power generation assessment index, and determine whether to adjust the power generation based on the power generation assessment index, and the power generation adjustment is used to adjust the power generation assessment index to not less than the preset power generation threshold, and the power generation assessment index is used to assess the power generation situation of the wind turbine; the load assessment module is used to obtain a load assessment index when the wind speed impact index is greater than the preset wind speed assessment threshold, and determine whether to adjust the load based on the load assessment index, and the load adjustment is used to adjust the load assessment index to not greater than the preset load threshold, and the load assessment index is used to assess the load situation of the wind turbine.

[0020] An embodiment of the present application provides an electronic device, which includes a memory for storing computer program instructions and a processor for executing the program instructions, wherein when the computer program instructions are executed by the processor, the electronic device is triggered to execute the control method based on the operation of a wind turbine.

[0021] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0022] 1. Real-time monitoring of wind turbines is performed through preset sensing devices to obtain wind turbine data and wind speed impact index, and then it is determined whether the wind speed impact index is greater than a preset wind speed assessment threshold. When the wind speed impact index is not greater than the preset wind speed assessment threshold, the power generation assessment index is obtained and it is determined whether to adjust the power generation. When the wind speed impact index is greater than the preset wind speed assessment threshold, the load assessment index is obtained and it is determined whether to adjust the load, thereby realizing dynamic monitoring of the operating status of the wind turbine, and further realizing the improvement of the accuracy of controlling the safe operation of the wind turbine, and effectively solving the problem of inaccurate control of the safe operation of the wind turbine in the prior art.

[0023] 2. The wind speed of the wind turbine is measured by the deployed wind speed sensor, and then the impeller radius is measured by the deployed laser displacement sensor, thereby improving the accuracy of obtaining the wind turbine operation data, and further improving the reliability of obtaining the wind turbine operation data.

[0024] 3. The wind speed influence index is obtained by combining the wind speed deviation ratio and the aerodynamic damping force deviation ratio, and then the power generation assessment index is obtained by combining the wind energy density deviation ratio and the wind speed influence index not greater than the preset wind speed assessment threshold. Finally, the load assessment index is obtained by combining the load deviation ratio and the wind speed influence index greater than the preset wind speed assessment threshold, thereby achieving accurate quantification of the control of wind turbine operation and improving the effectiveness of controlling the operation of wind turbines. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A flow chart of a control method based on the operation of a wind turbine generator system provided in an embodiment of the present application;

[0026] Figure 2 An overall flow chart provided for the embodiments of the present application;

[0027] Figure 3 A control flow chart of the main control system provided in the embodiment of the present application;

[0028] Figure 4 A statistical diagram of changes in the wind speed influence index provided in an embodiment of the present application, wherein (a) is a diagram of changes in the wind speed deviation ratio, and (b) is a diagram of changes in the aerodynamic damping force deviation ratio;

[0029] Figure 5 A schematic diagram of a structure of a control based on the operation of a wind turbine generator set provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] The embodiments of the present application solve the problem of inaccurate control of the safe operation of wind turbines in the prior art by providing a control method, system and equipment based on the operation of wind turbines. The wind turbines are monitored in real time by a preset sensor device to obtain wind turbine data, and then a wind speed influence index is obtained based on the wind turbine data and reference wind turbine data. Then, it is determined whether the wind speed influence index is greater than a preset wind speed assessment threshold. When the wind speed influence index is not greater than the preset wind speed assessment threshold, a power generation assessment index is obtained, and whether power generation adjustment is performed is determined based on the power generation assessment index. When the wind speed influence index is greater than the preset wind speed assessment threshold, a load assessment index is obtained, and whether load adjustment is performed is determined based on the load assessment index, thereby improving the accuracy of controlling the safe operation of wind turbines.

[0031] The technical solution in the embodiment of the present application is to solve the above-mentioned problem of inaccurate control of safe operation of wind turbines. The overall idea is as follows:

[0032] By real-time monitoring of wind turbines, wind turbine data and wind speed impact index are obtained and it is determined whether the wind speed impact index is greater than the preset wind speed assessment threshold. When the wind speed impact index is not greater than the preset wind speed assessment threshold, the power generation assessment index is obtained and it is determined whether to adjust the power generation. When the wind speed impact index is greater than the preset wind speed assessment threshold, the load assessment index is obtained and it is determined whether to adjust the load, thereby achieving the effect of improving the accuracy of controlling the safe operation of wind turbines.

[0033] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] like Figure 1As shown, it is a flow chart of a control method based on the operation of a wind turbine provided by an embodiment of the present application, the method comprising the following steps: S1, obtaining a wind speed influence index: monitoring the wind turbine in real time through a preset sensor device to obtain wind turbine data, obtaining a wind speed influence index according to the wind turbine data and reference wind turbine data, the wind speed influence index being used to evaluate the degree of influence of wind speed on the safe operation of the wind turbine; S2, obtaining a power generation evaluation index: judging whether the wind speed influence index is greater than a preset wind speed evaluation threshold, obtaining a power generation evaluation index when the wind speed influence index is not greater than the preset wind speed evaluation threshold, judging whether to adjust the power generation based on the power generation evaluation index, the power generation adjustment is used to adjust the power generation evaluation index to not less than the preset power generation threshold, the power generation evaluation index is used to evaluate the power generation situation of the wind turbine; S3, obtaining a load evaluation index: obtaining a load evaluation index when the wind speed influence index is greater than the preset wind speed evaluation threshold, judging whether to adjust the load based on the load evaluation index, the load adjustment is used to adjust the load evaluation index to not greater than the preset load threshold, the load evaluation index is used to evaluate the load situation of the wind turbine.

[0035] For a single wind turbine, the analysis is performed. Figure 2 As shown, it is the overall flow chart provided by the embodiment of the present application. The wind speed impact index is a prerequisite, which determines whether to obtain the power generation assessment index or the load assessment index. When the wind speed impact is smaller, that is, the wind speed impact index is not greater than the preset wind speed assessment threshold, pay attention to the power generation situation; when the wind speed impact is greater, that is, the wind speed impact index is greater than the preset wind speed assessment threshold, pay attention to the load situation to ensure the safe and efficient operation of the wind turbine.

[0036] For example, the central monitoring system of the wind farm often fails to operate stably due to poor system stability, as the software architecture used is relatively old. The system often crashes unexpectedly, data is lost, data is inaccurate, and some functions cannot be used normally. It is planned to implement control system transformation for 50 wind turbines, including the main control system, safety system, on-site monitoring system, remote central monitoring system, etc. Figure 3 As shown, it is a control flow chart of the main control system provided in the embodiment of the present application. The functions of the main control system are divided into two parts: a control part and a safety part. The control system mainly realizes three major functions, namely, normal operation control, parameter monitoring and supervision, and safety protection and processing. The embodiment of the present application can monitor the wind speed impact index, the power generation evaluation index and the load evaluation index. When the wind speed is higher but does not exceed the rated wind speed of the system, the power generation of the wind turbine is increased, and when the wind speed is lower but not lower than the rated wind speed of the system, the load of the wind turbine is reduced; thereby improving the accuracy of controlling the safe operation of the wind turbine.

[0037] It should be added that the specific process of real-time monitoring of the wind turbine and obtaining wind turbine data through the preset sensing device is as follows: the wind speed of the wind turbine is measured by the deployed wind speed sensor to obtain the wind speed of the wind turbine, and the wind speed sensor is used to provide real-time wind speed information; the wind turbine is measured by the deployed laser displacement sensor to obtain the impeller radius; the preset sensing device includes a wind speed sensor and a laser displacement sensor; the wind turbine data includes the wind speed of the wind turbine and the impeller radius; the impeller radius represents the distance from the rotation axis to the center point of the blade tip of the wind turbine blade.

[0038] Specifically, the wind speed sensor is deployed at the center height of the wind turbine hub. One wind speed sensor is deployed at the center height of the hub of each wind turbine, and the real-time data recorded by the wind speed sensor is transmitted to the control system; the laser displacement sensor is deployed at a preset position on the back of the cabin of each wind turbine, and the blades are directly illuminated by the laser radar to achieve real-time monitoring of the impeller radius, and the real-time monitored data is transmitted to the control system.

[0039] Specifically, the specific process of obtaining the wind speed impact index based on the wind turbine data and the reference wind turbine data is as follows: the obtained wind turbine wind speed and the preset maximum wind speed threshold are calculated to obtain the wind speed deviation ratio (i.e., the wind speed impact index in the limiting expression). ), the wind speed deviation ratio is used to reflect the deviation of the wind speed of the wind turbine; the initial aerodynamic damping force is obtained by combining the wind speed, impeller radius, air density and drag coefficient of the wind turbine. The initial aerodynamic damping force is used to reflect the resistance generated by the wind turbine in the air; the initial aerodynamic damping force and the preset maximum damping force threshold are ratio-calculated to obtain the aerodynamic damping force deviation ratio (i.e., the value in the limiting expression of the wind speed influence index) ), the aerodynamic damping force deviation ratio is used to reflect the deviation of the resistance generated by the wind turbine in the air; the wind speed deviation ratio and the aerodynamic damping force deviation ratio are combined to obtain the wind speed influence index; the reference wind turbine data is obtained from the preset database; the reference wind turbine data includes the preset maximum damping force threshold, the preset maximum wind speed threshold, the air density and the drag coefficient.

[0040] Among them, the limiting expression of wind speed impact index is as follows:

[0041] ;

[0042] ;

[0043] ;

[0044] In the formula, It represents the wind speed impact index of the wind turbine at the i-th preset time point, , i represents the number of the preset time point, k represents the total number of preset time points, It represents the wind speed deviation ratio of the wind turbine at the i-th preset time point, represents the aerodynamic damping force deviation ratio of the wind turbine at the i-th preset time point, represents the wind speed of the wind turbine at the i-th preset time point, represents the impeller radius of the wind turbine at the i-th preset time point, represents the air density, represents the drag coefficient, Indicates the preset maximum damping force threshold, represents the preset maximum wind speed threshold, and e represents a natural constant.

[0045] In this embodiment, the laser displacement sensor can accurately measure the distance from the rotation axis of the impeller to the center point of the blade tip by emitting laser and receiving the reflected light signal. The distance from the rotation axis to the center point of the blade tip of each blade of the wind turbine is equal. The wind speed sensor converts the real-time monitored wind speed information into an electrical signal or a digital signal. The preset sensing device maintains data communication with the frequency conversion system and the pitch control system to realize the start and stop, grid connection and disconnection, blade angle, yaw to wind and other controls of the wind turbine; and realizes the monitoring of the operating status of the wind turbine.

[0046] Specifically, the preset maximum damping force threshold is represented by the maximum value of the damping force of the wind turbine in the historical time period in the preset database, and the preset maximum wind speed threshold is represented by the maximum value of the wind speed to which the wind turbine is subjected in the historical time period in the preset database. The air density is generally 1.255. , the resistance coefficient is expressed by the average value of the wind turbine operating damping coefficient in the preset database.

[0047] It should be understood that the algorithm of this embodiment combines the wind turbine data for comprehensive analysis to obtain the wind speed impact index. The wind turbine data in the algorithm of this embodiment does not exist independently, but is interrelated. The greater the wind speed of the wind turbine, it does not mean that the wind speed impact index is lower. The influence of the impeller radius should also be considered comprehensively. The faster the wind speed of the wind turbine, the larger the impeller radius, the stronger the ability to capture wind, the higher the output power of the wind turbine, and the aerodynamic damping of the wind turbine may increase. As the aerodynamic damping increases, the stability of the system will be enhanced. Under the influence of wind speed changes or external disturbances, aerodynamic damping can more effectively absorb and dissipate the vibration energy of the system, allowing the system to return to equilibrium more quickly. The parameters of the algorithm of this embodiment need to consider their impact on the results together.

[0048] Specifically, assuming that the wind speed deviation ratio The range is 0.01-0.1, the pneumatic damping force deviation ratio The range is 0.06-0.1, such as Figure 4As shown in the figure, it is a statistical diagram of the change of the wind speed influence index provided by the embodiment of the present application, wherein (a) is a diagram of the change of the wind speed deviation ratio. It can be seen from the figure that when the aerodynamic damping force deviation ratio Fixed to 0.06, with wind speed deviation ratio The wind speed influence index gradually decreases as the wind speed increases. (b) is the change diagram of the aerodynamic damping force deviation ratio. It can be seen from the figure that when the wind speed deviation ratio Fixed to 0.01, with the aerodynamic damping force deviation ratio The wind speed influence index gradually increases and decreases, which means that the influence of wind speed on the safe operation of wind turbines gradually decreases, and the stability of wind turbine operation gradually improves; the influence of wind speed on the safe operation of wind turbines is quantified, and then the accuracy of controlling the safe operation of wind turbines is improved.

[0049] Furthermore, the specific process of obtaining the power generation evaluation index is as follows: the initial wind energy density is obtained by combining the obtained air density and the wind speed of the wind turbine, and the initial wind energy density is used to reflect the power generation of the wind turbine; the initial wind energy density and the preset maximum wind energy density threshold are added to obtain the initial wind energy density deviation value, and the initial wind energy density deviation value is represented by the result of the addition of the initial wind energy density and the preset maximum wind energy density threshold; the initial wind energy density deviation value and 2 times the preset maximum wind energy density threshold are ratio-calculated to obtain the wind energy density deviation ratio (i.e., the wind energy density deviation ratio in the limiting expression of the power generation evaluation index) ), the wind energy density deviation ratio is used to reflect the deviation of the electric energy generated by the wind turbine; the power generation evaluation index is obtained by combining the wind energy density deviation ratio and the wind speed impact index that is not greater than the preset wind speed evaluation threshold.

[0050] Among them, the restricted expression of power generation evaluation index is as follows:

[0051] ;

[0052] ;

[0053] In the formula, represents the power generation evaluation index of the wind turbine at the i-th preset time point, , i represents the number of the preset time point, k represents the total number of preset time points, represents the wind speed of the wind turbine at the i-th preset time point, It represents the wind energy density deviation ratio of the wind turbine at the i-th preset time point, Indicates the wind speed impact index of the wind turbine set at the i-th preset time point that is not greater than the preset wind speed assessment threshold, Indicates the preset maximum wind energy density threshold, represents the air density and e represents a natural constant.

[0054] The algorithm of this embodiment combines the wind speed of the wind turbine and the wind speed influence index for comprehensive analysis to obtain the power generation evaluation index. In the algorithm of this embodiment, the wind speed of the wind turbine and the wind speed influence index do not exist independently, but are interrelated. The greater the wind speed of the wind turbine, it does not mean that the power generation evaluation index is higher. The influence of the wind speed influence index should also be considered comprehensively. When the wind speed influence index is lower, it indicates that the wind turbine can maintain higher power generation efficiency and stability under the current wind speed conditions, which may lead to a higher wind energy density, which means that the airflow passing through the wind turbine blades in unit time contains more energy, so the generator can generate more electricity, thereby improving the power generation evaluation index. The parameters of the algorithm of this embodiment need to consider their impact on the results together.

[0055] Specifically, assuming that the wind energy density deviation ratio The wind speed impact index ranges from 0.06 to 0.1, which is not greater than the preset wind speed assessment threshold. The range is 0.01-0.1, as shown in Table 1, which is a statistical table of changes in the power generation evaluation index provided in the embodiment of the present application:

[0056] Table 1 Statistics of changes in power generation assessment index

[0057] From Table 1 above, we can see that as the wind energy density deviation ratio The wind speed impact index is not greater than the preset wind speed assessment threshold. The power generation assessment index The gradual increase means that the power generation capacity of the wind turbine is gradually enhanced; the power generation situation of the wind turbine is quantified, and then the accuracy of controlling the safe operation of the wind turbine is improved.

[0058] Furthermore, the specific process of judging whether to adjust the power generation based on the power generation evaluation index is as follows: the first step is to judge whether the power generation evaluation index is not lower than the preset power generation threshold. When the power generation evaluation index is not lower than the preset power generation threshold, continue to monitor the operation of the wind turbine, otherwise execute the second step; the second step is to send a prompt to the preset personnel to increase the operating speed of the wind turbine by a preset multiple until the preset maximum speed. When the monitored power generation evaluation index is not lower than the preset power generation threshold, continue to monitor the operation of the wind turbine, otherwise execute the third step; the third step is to send a prompt to the preset personnel to reduce the blade angle of the wind turbine by a preset multiple until the preset minimum angle. When the monitored power generation evaluation index is not lower than the preset power generation threshold, continue to monitor the operation of the wind turbine, otherwise it is judged as unsafe operation and a prompt is sent to stop operation.

[0059] In this embodiment, the preset power generation threshold is represented by the variance of the power generation of the wind turbine in the historical time period in the preset database, the preset maximum speed is represented by the maximum speed of the wind turbine in the historical time period in the preset database, and the preset minimum angle is represented by the minimum blade angle of the wind turbine in the historical time period in the preset database.

[0060] It should be understood that increasing the operating speed of a wind turbine can capture more wind energy and convert it into more electrical energy. Because when the wind speed increases, the wind force on the wind turbine will also increase accordingly. At this time, if the operating speed remains unchanged, it may cause the wind turbine to be overloaded or damaged. Increasing the operating speed can better match the change in wind speed and keep the wind turbine running efficiently. When the wind speed is higher, if the blade angle is larger, the wind turbine may be subjected to greater wind impact, thereby increasing the wear and failure risk of mechanical components. Reducing the blade angle can reduce the wind impact on the wind turbine, reduce mechanical wear, and extend the service life of the wind turbine. The control system has a failure protection mechanism, and any failure of any sensor or starting component does not affect the safe shutdown of the wind turbine; the accuracy of controlling the safe operation of the wind turbine is improved.

[0061] Furthermore, the specific process of obtaining the load evaluation index is as follows: the initial wind load is obtained by combining the obtained air density, impeller radius, and wind speed of the wind turbine, and the initial wind load is used to reflect the pressure of the air flow on the wind turbine; the initial wind load and the preset maximum load threshold are added to obtain the initial load deviation value, and the initial load deviation value is represented by the result of the addition operation of the initial wind load and the preset maximum load threshold; the initial load deviation value and 2 times the preset maximum load threshold are ratioed to obtain the load deviation ratio (i.e., the load deviation ratio in the restriction expression of the load evaluation index) ), the load deviation ratio is used to reflect the pressure deviation caused by air flow on the wind turbine; the load assessment index is obtained by combining the load deviation ratio and the wind speed impact index greater than the preset wind speed assessment threshold.

[0062] The limiting expression of the load evaluation index is as follows:

[0063] ;

[0064] ;

[0065] In the formula, represents the load evaluation index of the wind turbine at the i-th preset time point, , i represents the number of the preset time point, k represents the total number of preset time points, represents the load deviation ratio of the wind turbine at the i-th preset time point, Indicates the wind speed impact index of the wind turbine set that is greater than the preset wind speed assessment threshold at the i-th preset time point, represents the wind speed of the wind turbine at the i-th preset time point, represents the impeller radius of the wind turbine at the i-th preset time point, represents the air density, represents the preset maximum load threshold, and e represents a natural constant.

[0066] In this embodiment, the algorithm of this embodiment combines the wind speed, impeller radius and wind speed influence index of the wind turbine to obtain a load assessment index through comprehensive analysis. In the algorithm of this embodiment, the wind speed, impeller radius and wind speed influence index of the wind turbine are not independent and are interrelated. The larger the wind speed influence index, the larger the load assessment index. The influence of the wind speed and impeller radius of the wind turbine should also be considered comprehensively. When the wind speed is lower, if the impeller radius is larger, the load of the wind turbine will increase, which may lead to an increase in mechanical stress and thermal stress, and then cause the operation of the wind turbine to be unstable, thereby affecting the power generation efficiency and operation safety. The parameters of the algorithm of this embodiment need to consider the impact on the results together and at the same time; the load condition of the wind turbine is quantified, and the accuracy of controlling the safe operation of the wind turbine is improved.

[0067] It is important to understand that Generally, 3.14 is taken. The preset maximum load threshold is represented by the maximum value of the wind turbine operating load in the historical time period in the preset database. The preset load threshold is represented by the variance of the wind turbine operating load in the historical time period in the preset database. The preset minimum speed is represented by the minimum value of the wind turbine operating speed in the historical time period in the preset database. The preset maximum angle is represented by the maximum value of the wind turbine operating blade angle in the historical time period in the preset database.

[0068] Furthermore, the specific process of judging whether to adjust the load based on the load assessment index is as follows: SS1, judging whether the load assessment index is not greater than the preset load threshold. When the load assessment index is not greater than the preset load threshold, the operation of the wind turbine continues to be monitored, otherwise SS2 is executed; SS2, sending a prompt to the preset personnel to reduce the operating speed of the wind turbine by a preset multiple until the preset minimum speed. When the monitored load assessment index is not greater than the preset load threshold, the operation of the wind turbine continues to be monitored, otherwise SS3 is executed; SS3, sending a prompt to the preset personnel to increase the blade angle of the wind turbine by a preset multiple until the preset maximum angle. When the monitored load assessment index is not greater than the preset load threshold, the operation of the wind turbine continues to be monitored, otherwise it is judged to be unsafe operation, and a prompt is sent to stop operation.

[0069] In this embodiment, when the wind speed is lower, if the wind turbine runs at a higher speed, the mechanical parts may be subjected to excessive stress, resulting in wear or damage. By reducing the running speed, the stress on these mechanical parts can be reduced, and increasing the blade angle can enable the blades to better capture wind energy. This is because the change in blade angle affects the blade's ability to capture wind power. By increasing the blade angle, the wind turbine can maintain a high power generation efficiency, and the accuracy of controlling the safe operation of the wind turbine is improved.

[0070] like Figure 5 As shown, it is a structural schematic diagram of a control system based on the operation of a wind turbine provided in an embodiment of the present application. A control system based on the operation of a wind turbine provided in an embodiment of the present application includes a wind speed impact assessment module, a power generation assessment module and a load assessment module: wherein the wind speed impact assessment module is used to monitor the wind turbine in real time through a preset sensor device to obtain wind turbine data, and obtain a wind speed impact index according to the wind turbine data and the reference wind turbine data, and the wind speed impact index is used to assess the degree of influence of wind speed on the safe operation of the wind turbine; the power generation assessment module is used to determine whether the wind speed impact index is greater than a preset wind speed assessment threshold, and when the wind speed impact index is not greater than the preset wind speed assessment threshold, the power generation assessment index is obtained, and whether to adjust the power generation based on the power generation assessment index, the power generation adjustment is used to adjust the power generation assessment index to not less than the preset power generation threshold, and the power generation assessment index is used to assess the power generation situation of the wind turbine; the load assessment module is used to obtain a load assessment index when the wind speed impact index is greater than the preset wind speed assessment threshold, and determine whether to adjust the load based on the load assessment index, and the load adjustment is used to adjust the load assessment index to not greater than the preset load threshold, and the load assessment index is used to assess the load situation of the wind turbine.

[0071] In this embodiment, the wind speed impact index, power generation assessment index and load assessment index provided in the embodiment of the present application are only analyzed for a single wind turbine. The wind speed impact assessment module monitors the wind turbine data in real time through a preset sensor device. When the wind speed impact index is not greater than the preset wind speed assessment threshold, the power generation assessment module begins to function. Based on the power generation assessment index, the power generation assessment module determines whether it is necessary to adjust the power generation. When the wind speed impact index exceeds the preset wind speed assessment threshold, it means that the wind speed may pose a threat to the safe operation of the wind turbine. At this time, the load assessment module starts to work and obtains the load assessment index to assess the load condition of the wind turbine; the accuracy of controlling the safe operation of the wind turbine is improved.

[0072] An embodiment of the present application provides an electronic device, which includes a memory for storing computer program instructions and a processor for executing the program instructions, wherein when the computer program instructions are executed by the processor, the electronic device is triggered to execute a control method based on the operation of a wind turbine.

[0073] In this embodiment, the electronic device includes a memory for storing computer program instructions and a processor for executing the computer program instructions in the memory, thereby improving the accuracy of controlling the safe operation of the wind turbine.

[0074] To summarize, the embodiment of the present application monitors the wind turbine in real time through a preset sensor device to obtain wind turbine data and wind speed influence index, and then determines whether the wind speed influence index is greater than a preset wind speed assessment threshold. When the wind speed influence index is not greater than the preset wind speed assessment threshold, the power generation assessment index is obtained and it is determined whether to adjust the power generation; when the wind speed influence index is greater than the preset wind speed assessment threshold, the load assessment index is obtained and it is determined whether to adjust the load, thereby realizing dynamic monitoring of the operating status of the wind turbine, and further realizing the improvement of the accuracy of controlling the safe operation of the wind turbine, effectively solving the problem of inaccurate control of the safe operation of the wind turbine in the prior art.

[0075] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0076] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0077] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0078] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0079] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0080] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A control method based on the operation of a wind turbine generator set, characterized in that: The following steps are involved: S1, real-time monitoring of the wind turbine generator set by a preset sensor device to obtain wind turbine generator set data, and obtaining a wind speed impact index according to the wind turbine generator set data and reference wind turbine generator set data, wherein the wind speed impact index is used to evaluate the impact of wind speed on the safe operation of the wind turbine generator set; S2, judging whether the wind speed impact index is greater than a preset wind speed assessment threshold, obtaining a power generation assessment index when the wind speed impact index is not greater than the preset wind speed assessment threshold, judging whether to adjust the power generation based on the power generation assessment index, the power generation adjustment is used to adjust the power generation assessment index to not less than the preset power generation threshold, the power generation assessment index is used to evaluate the power generation of the wind turbine; S3, when the wind speed impact index is greater than a preset wind speed assessment threshold, a load assessment index is obtained, and whether to perform load adjustment is determined based on the load assessment index, wherein the load adjustment is used to adjust the load assessment index to no greater than a preset load threshold, and the load assessment index is used to assess the load condition of the wind turbine.

2. A control method based on the operation of a wind turbine as claimed in claim 1, characterized in that: The specific process of real-time monitoring of the wind turbine generator set by the preset sensor device to obtain wind turbine generator set data is as follows: The wind speed of the wind turbine is measured by a deployed wind speed sensor to obtain the wind speed of the wind turbine. The wind speed sensor is used to provide real-time wind speed information; The impeller radius of the wind turbine is measured by deploying laser displacement sensors; The preset sensing device includes a wind speed sensor and a laser displacement sensor; The wind turbine data includes wind speed and impeller radius of the wind turbine; The impeller radius represents the distance from the rotation axis to the center point of the blade tip of the wind turbine blade.

3. A control method based on the operation of a wind turbine as claimed in claim 2, characterized in that: The specific process of obtaining the wind speed impact index based on the wind turbine data and the reference wind turbine data is as follows: The obtained wind speed of the wind turbine generator set is calculated by ratio with the preset maximum wind speed threshold to obtain the wind speed deviation ratio; The initial aerodynamic damping force is obtained by combining the wind speed, impeller radius, air density and drag coefficient of the wind turbine generator set, wherein the initial aerodynamic damping force is used to reflect the drag generated by the wind turbine generator set in the air; Performing a ratio calculation on the initial pneumatic damping force and the preset maximum damping force threshold to obtain a pneumatic damping force deviation ratio; The wind speed influence index is obtained by combining the wind speed deviation ratio and the aerodynamic damping force deviation ratio; The reference wind turbine generator set data includes a preset maximum damping force threshold, a preset maximum wind speed threshold, air density and a drag coefficient.

4. A control method based on the operation of a wind turbine as claimed in claim 3, characterized in that: The limiting expression of the wind speed impact index is as follows: ； ； ； In the formula, represents the wind speed impact index of the wind turbine at the i-th preset time point, , i represents the number of the preset time point, k represents the total number of preset time points, It represents the wind speed deviation ratio of the wind turbine at the i-th preset time point, represents the aerodynamic damping force deviation ratio of the wind turbine at the i-th preset time point, represents the wind speed of the wind turbine at the i-th preset time point, represents the impeller radius of the wind turbine at the i-th preset time point, represents the air density, represents the drag coefficient, Indicates the preset maximum damping force threshold, represents the preset maximum wind speed threshold, and e represents a natural constant.

5. A control method based on the operation of a wind turbine as claimed in claim 1, characterized in that: The specific process of obtaining the power generation evaluation index is as follows: Acquire initial wind energy density by combining the acquired air density and wind speed of the wind turbine generator set, wherein the initial wind energy density is used to reflect the power generation of the wind turbine generator set; The initial wind energy density and the preset maximum wind energy density threshold are added to obtain an initial wind energy density deviation value, wherein the initial wind energy density deviation value is represented by the result of adding the initial wind energy density and the preset maximum wind energy density threshold; The initial wind energy density deviation value and twice the preset maximum wind energy density threshold are calculated to obtain a wind energy density deviation ratio, where the wind energy density deviation ratio is used to reflect the deviation of the electric energy generated by the wind turbine generator set; The power generation evaluation index is obtained by combining the wind energy density deviation ratio and a wind speed influence index that is not greater than a preset wind speed evaluation threshold.

6. A control method based on the operation of a wind turbine as claimed in claim 5, characterized in that: The specific process of judging whether to adjust the power generation based on the power generation evaluation index is as follows: The first step is to determine whether the power generation evaluation index is not lower than the preset power generation threshold. When the power generation evaluation index is not lower than the preset power generation threshold, the operation of the wind turbine generator set will continue to be monitored. Otherwise, the second step will be executed. The second step is to send a reminder to the preset personnel to increase the wind turbine operating speed by a preset multiple until the preset maximum speed. When the monitored power generation evaluation index is not lower than the preset power generation threshold, the wind turbine operation status will continue to be monitored, otherwise the third step will be executed; The third step is to send a prompt to the preset personnel to reduce the wind turbine blade angle by a preset multiple until it reaches the preset minimum angle. When the monitored power generation evaluation index is not lower than the preset power generation threshold, the wind turbine operation status will continue to be monitored, otherwise it will be prompted to stop operation.

7. A control method based on the operation of a wind turbine as claimed in claim 1, characterized in that: The specific process of obtaining the load evaluation index is as follows: The initial wind load is obtained by combining the obtained air density, impeller radius, and wind speed of the wind turbine generator set, wherein the initial wind load is used to reflect the pressure generated by the air flow on the wind turbine generator set; Adding the initial wind load to the preset maximum load threshold value to obtain an initial load deviation value, wherein the initial load deviation value is represented by a result of adding the initial wind load to the preset maximum load threshold value; The load deviation ratio is obtained by performing a ratio operation on the initial load deviation value and twice the preset maximum load threshold, and the load deviation ratio is used to reflect the pressure deviation caused by air flow on the wind turbine generator set; The load assessment index is obtained by combining the load deviation ratio and the wind speed influence index greater than a preset wind speed assessment threshold.

8. A control method based on the operation of a wind turbine as claimed in claim 7, characterized in that: The specific process of determining whether to perform load adjustment based on the load evaluation index is as follows: SS1, judging whether the load evaluation index is not greater than the preset load threshold. When the load evaluation index is not greater than the preset load threshold, the operation of the wind turbine generator set continues to be monitored. Otherwise, SS2 is executed. SS2, sending a reminder to the preset personnel to reduce the wind turbine operating speed by a preset multiple until the preset minimum speed value. When the monitored load evaluation index is not greater than the preset load threshold, the wind turbine operation status continues to be monitored, otherwise SS3 is executed; SS3, sends a prompt to the preset personnel to increase the wind turbine blade angle by a preset multiple until it reaches the preset maximum angle. When the monitored load assessment index is not greater than the preset load threshold, the wind turbine operation continues to be monitored. Otherwise, it is judged as unsafe operation and a prompt is sent to stop the operation.

9. A control system based on the operation of a wind turbine, characterized in that: Including wind speed impact assessment module, power generation assessment module and load assessment module: The wind speed impact assessment module is used to monitor the wind turbine in real time through a preset sensor device to obtain wind turbine data, and obtain a wind speed impact index based on the wind turbine data and reference wind turbine data. The wind speed impact index is used to assess the impact of wind speed on the safe operation of the wind turbine; The power generation evaluation module is used to determine whether the wind speed impact index is greater than a preset wind speed evaluation threshold, and when the wind speed impact index is not greater than the preset wind speed evaluation threshold, the power generation evaluation index is obtained, and whether to adjust the power generation based on the power generation evaluation index is determined, and the power generation adjustment is used to adjust the power generation evaluation index to not less than the preset power generation threshold. The power generation evaluation index is used to evaluate the power generation of the wind turbine; The load assessment module is used to obtain a load assessment index when the wind speed impact index is greater than a preset wind speed assessment threshold, and determine whether to perform load adjustment based on the load assessment index. The load adjustment is used to adjust the load assessment index to no greater than a preset load threshold. The load assessment index is used to assess the load condition of the wind turbine.

10. An electronic device, characterized in that: The electronic device includes a memory for storing computer program instructions and a processor for executing program instructions, wherein when the computer program instructions are executed by the processor, the electronic device is triggered to execute a control method based on the operation of a wind turbine generator set as described in any one of claims 1-8.

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