A control method, system and device based on the operation of a wind turbine

Abstract

The present invention discloses a control method, system and device based on the operation of a wind turbine generator set, relating to the technical field of wind power generation control. The control method based on the operation of a wind turbine generator set includes the following steps: obtaining a wind speed influence index; obtaining a power generation evaluation index; obtaining a load evaluation index. By monitoring the wind turbine generator set in real time to obtain the data of the wind turbine generator set and the wind speed influence index and judging whether the wind speed influence index is greater than a preset wind speed evaluation threshold, when the wind speed influence index is not greater than the preset wind speed evaluation threshold, obtaining the power generation evaluation index and judging whether to adjust the power generation amount, and when the wind speed influence index is greater than the preset wind speed evaluation threshold, obtaining the load evaluation index and judging whether to adjust the load, the effect of improving the accuracy of controlling the safe operation of the wind turbine generator set is achieved, and the problem of inaccurate control of the safe operation of the wind turbine generator set existing in the prior art is solved.

Description

Technical Field

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

[0002] Wind power generation is a process of using wind energy to drive a wind turbine generator set to rotate and drive a generator to generate electricity through a rotating rotor. In order to improve the power generation efficiency and reliability of a wind turbine generator set, precise control of its operation is required. This includes controlling the rotational speed, blade angle, and grid connection of the wind turbine generator set to optimize the utilization efficiency of wind energy and ensure the safety and stability of power transmission. The rotational speed of a wind turbine generator set directly affects the output power of the generator and the stability of the power grid. By controlling the rotational speed, the wind turbine generator set can achieve the best power generation efficiency at different wind speeds. Rotational speed control technologies usually adopt two methods: pitch control and frequency conversion control. With the progress of technology and the growth of demand, efficient wind power generation control technologies are also constantly evolving and improving. For example, the use of artificial intelligence and big data analysis technologies can achieve intelligent wind power generation control, improving the adaptive ability and efficiency of the generator set. In addition, with the rapid development of the new energy industry and the increasing global demand for clean energy, wind power generation control technologies will pay more attention to innovation, efficiency, and intelligent development.

[0003] Existing methods mainly rely on a control method of adjusting the rotational speed of a wind turbine generator set according to the change of wind speed. At low wind speeds, the rotational speed of the wind turbine generator set is relatively low to ensure that the unit obtains sufficient starting wind speed; while at high wind speeds, the rotational speed will gradually increase to improve the power generation efficiency of the wind turbine generator set.

[0004] For example, a method for controlling the operation of a dual-rotor wind turbine generator set disclosed in the patent application with the publication number of CN117072376A includes: obtaining the rotational speeds and pitch angles of the front and rear rotors of the dual-rotor wind turbine generator set at the current wind speed; taking the maximum overall output power of the dual-rotor wind turbine generator set as the goal to determine the target rotational speeds and pitch angles of the front and rear rotors of the dual-rotor wind turbine generator set at the current wind speed; respectively establishing linearized models based on state space for the drive trains of the front and rear rotors; based on the linearized models, introducing a state observer, a disturbance regulation controller, and a quadratic regulator to design torque controllers and pitch controllers for the front and rear rotors to achieve the control of the front and rear rotors.

[0005] For example, a method for controlling the operation of a direct-drive wind turbine disclosed in the invention patent application with the publication number CN114483451A includes: collecting the historical operation parameter information of the direct-drive wind turbine, and extracting the operation state information of the wind turbine under different environments; judging the numerical values of relevant parameters when the wind turbine has an operation fault according to the operation state information of the wind turbine under different environments; constructing a linear function model by using the numerical values of relevant parameters; monitoring the real-time operation parameters of the direct-drive wind turbine, and when the deviation degree of the real-time operation parameters of the wind turbine from the corresponding parameters in the linear function model is higher than the preset threshold, activating the operation adjustment control mechanism of the wind turbine to maintain the stable operation of the direct-drive wind turbine.

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

[0007] In the prior art, due to the relatively old software architecture adopted by the wind farm control system, communication failures of on-site units and frequent failures of module aging and damage occur, and the wind turbine cannot operate stably at the rated wind speed, resulting in inaccurate control of the safe operation of the wind turbine. Summary of the Invention

[0008] The embodiments of the present application provide a control method, system and device based on the operation of a wind turbine, which solve the problem of inaccurate control of the safe operation of the wind turbine in the prior art and realize the improvement of the accuracy of controlling the safe operation of the wind turbine.

[0009] The embodiments of the present application provide a control method based on the operation of a wind turbine, including the following steps: S1, obtaining the wind turbine data by real-time monitoring of the wind turbine through a preset sensing device, and obtaining a wind speed influence index according to the wind turbine data and the reference wind turbine data, where the wind speed influence index is used to evaluate the influence degree of the 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 evaluation threshold, and when the wind speed influence index is not greater than the preset wind speed evaluation threshold, obtaining a power generation evaluation index, and judging whether to perform power generation adjustment based on the power generation evaluation index, where the power generation adjustment is used to adjust the power generation evaluation index to not less than a preset power generation threshold, and the power generation evaluation index is used to evaluate the power generation situation of the wind turbine; S3, when the wind speed influence index is greater than the preset wind speed evaluation threshold, obtaining a load evaluation index, and judging whether to perform load adjustment based on the load evaluation index, where the load adjustment is used to adjust the load evaluation index to not greater than a preset load threshold, and the load evaluation index is used to evaluate the load situation of the wind turbine.

[0010] Further, the specific process of obtaining wind turbine data by real-time monitoring of the wind turbine through a preset sensing device is as follows: Measuring the wind turbine through a 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; Measuring the wind turbine through a 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 of the wind turbine blade to the center point of the blade tip.

[0011] Further, the specific process of obtaining the wind speed influence index according to the wind turbine data and the reference wind turbine data is as follows: Calculating the ratio of the obtained wind speed of the wind turbine and the preset maximum wind speed threshold to obtain the wind speed deviation ratio; Combining the wind speed of the wind turbine, the impeller radius, the air density, and the drag coefficient to obtain the initial aerodynamic damping force, and the initial aerodynamic damping force is used to reflect the resistance generated by the wind turbine in the air; Performing a ratio operation on the initial aerodynamic damping force and the preset maximum damping force threshold to obtain the aerodynamic damping force deviation ratio; Combining the wind speed deviation ratio and the aerodynamic damping force deviation ratio to obtain the wind speed influence index; The reference wind turbine data includes a preset maximum damping force threshold, a preset maximum wind speed threshold, air density, and a drag coefficient.

[0012] Further, the limit expression of the wind speed influence index is as follows:

[0013] ;

[0014] ;

[0015] ;

[0016] In the formula, represents the wind speed influence 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 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, represents the preset maximum damping force threshold, represents the preset maximum wind speed threshold, and e represents the natural constant.

[0017] Further, the specific process of obtaining the power generation evaluation index is as follows: combining the obtained air density and the wind turbine speed to obtain the initial wind energy density, which is used to reflect the power generation situation of the wind turbine; performing an addition operation on the initial wind energy density and the preset maximum wind energy density threshold to obtain the initial wind energy density deviation value, which is represented by the result of the addition operation of the initial wind energy density and the preset maximum wind energy density threshold; performing a ratio calculation on the initial wind energy density deviation value and twice the preset maximum wind energy density threshold to obtain the wind energy density deviation ratio, which is used to reflect the deviation situation of the power generation of the wind turbine; combining the wind energy density deviation ratio and the wind speed influence index not greater than the preset wind speed evaluation threshold to obtain the power generation evaluation index.

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

[0019] The embodiment of the present application provides a control system based on the operation of a wind turbine, including a wind speed influence evaluation module, a power generation evaluation module, and a load evaluation module: among them, the wind speed influence evaluation module is used to obtain wind turbine data by real-time monitoring of the wind turbine through a preset sensing device, and obtain the wind speed influence index according to the wind turbine data and the reference wind turbine data, and the wind speed influence index is used to evaluate the influence degree of the wind speed on the safe operation of the wind turbine; the power generation evaluation module is used to judge whether the wind speed influence index is greater than the preset wind speed evaluation threshold. When the wind speed influence index is not greater than the preset wind speed evaluation threshold, obtain the power generation evaluation index, and judge whether to adjust the power generation amount 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, and the power generation evaluation index is used to evaluate the power generation situation of the wind turbine; the load evaluation module is used to obtain the load evaluation index when the wind speed influence index is greater than the preset wind speed evaluation threshold, and judge 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, and the load evaluation index is used to evaluate 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. 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 generator set.

[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. By presetting a sensing device to monitor the wind turbine generator set in real time to obtain wind turbine generator set data and a wind speed influence index, then determining whether the wind speed influence index is greater than a preset wind speed evaluation threshold. When the wind speed influence index is not greater than the preset wind speed evaluation threshold, obtain a power generation evaluation index and determine whether to adjust the power generation amount. When the wind speed influence index is greater than the preset wind speed evaluation threshold, obtain a load evaluation index and determine whether to adjust the load, thereby realizing dynamic monitoring of the operation state of the wind turbine generator set, and further realizing an improvement in the accuracy of controlling the safe operation of the wind turbine generator set, effectively solving the problem of inaccurate control of the safe operation of the wind turbine generator set in the prior art.

[0023] 2. By measuring the wind turbine generator set with a deployed wind speed sensor to obtain the wind speed of the wind turbine generator set, and then measuring the wind turbine generator set with a deployed laser displacement sensor to obtain the impeller radius, thereby realizing an improvement in the accuracy of obtaining the operation data of the wind turbine generator set, and further realizing an improvement in the reliability of obtaining the operation data of the wind turbine generator set.

[0024] 3. By combining the wind speed deviation ratio and the aerodynamic damping force deviation ratio to obtain the wind speed influence index, then combining the wind energy density deviation ratio and the wind speed influence index not greater than the preset wind speed evaluation threshold to obtain the power generation evaluation index, and finally combining the load deviation ratio and the wind speed influence index greater than the preset wind speed evaluation threshold to obtain the load evaluation index, thereby realizing accurate quantification of the control of the operation of the wind turbine generator set, and further realizing an improvement in the effectiveness of controlling the operation of the wind turbine generator set. Description of the Drawings

[0025] Figure 1 It is a flowchart of a control method based on the operation of a wind turbine generator set provided by an embodiment of the present application;

[0026] Figure 2 It is the overall flowchart provided by an embodiment of the present application;

[0027] Figure 3 It is the main control system control flowchart provided by an embodiment of the present application;

[0028] Figure 4 It is a statistical chart of the change of the wind speed influence index provided by an embodiment of the present application, where (a) is the wind speed deviation ratio change chart and (b) is the aerodynamic damping force deviation ratio change chart;

[0029] Figure 5 This is a schematic structural diagram provided by an embodiment of the present application for the control based on the operation of a wind turbine generator set. Specific embodiments

[0030] By providing a control method, system and device based on the operation of a wind turbine generator set in an embodiment of the present application, the problem that the control of the safe operation of the wind turbine generator set in the prior art is inaccurate is solved. The wind turbine generator set is monitored in real time through a preset sensing device to obtain the data of the wind turbine generator set, and then the wind speed influence index is obtained according to the data of the wind turbine generator set and the reference data of the wind turbine generator set. Then, it is judged whether the wind speed influence index is greater than a preset wind speed evaluation threshold. When the wind speed influence index is not greater than the preset wind speed evaluation threshold, the power generation evaluation index is obtained, and it is judged whether to adjust the power generation amount based on the power generation evaluation index. When the wind speed influence index is greater than the preset wind speed evaluation threshold, the load evaluation index is obtained, and it is judged whether to adjust the load based on the load evaluation index, realizing the improvement of the accuracy of controlling the safe operation of the wind turbine generator set.

[0031] The technical solution in the embodiment of the present application for solving the problem that the control of the safe operation of the wind turbine generator set is inaccurate is as follows:

[0032] By monitoring the wind turbine generator set in real time to obtain the data of the wind turbine generator set and the wind speed influence index and judging whether the wind speed influence index is greater than a preset wind speed evaluation threshold, when the wind speed influence index is not greater than the preset wind speed evaluation threshold, the power generation evaluation index is obtained and it is judged whether to adjust the power generation amount, and when the wind speed influence index is greater than the preset wind speed evaluation threshold, the load evaluation index is obtained and it is judged whether to adjust the load, achieving the effect of improving the accuracy of controlling the safe operation of the wind turbine generator set.

[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 of the specification and specific embodiments.

[0034] As 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 obtaining wind turbine data by real-time monitoring of wind turbines through a preset sensing device is as follows: The wind speed of the wind turbine is measured by a deployed wind speed sensor, and the wind speed sensor is used to provide real-time wind speed information; the impeller radius is measured by a deployed laser displacement sensor for the wind turbine; 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 of the wind turbine blade to the center point of the blade tip.

[0038] Specifically, the wind speed sensor is deployed at the hub center height of the wind turbine, and one wind speed sensor is deployed at the hub center height 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 point on the back of the nacelle of each wind turbine, and the impeller radius is monitored in real time by directly irradiating the blade with a lidar, and the real-time monitored data is transmitted to the control system.

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

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

[0041] ;

[0042] ;

[0043] ;

[0044] In the formula, represents the wind speed influence index of the wind turbine at the i-th preset time point, , i represents the number of the preset time point, and k represents the total number of the preset time points. 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 turbine 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, represents the preset maximum damping force threshold, represents the preset maximum wind speed threshold, and e represents the 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 optical signal. The distances from the rotation axis of each blade of the wind turbine to the center point of the blade tip are 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 system to realize the control of starting, stopping, grid disconnection, blade angle, yaw alignment, etc. of the wind turbine; the operation state of the wind turbine is monitored.

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

[0047] It should be understood that the algorithm of this embodiment combines the data of the wind turbine for comprehensive analysis to obtain the wind speed influence index. The data of the wind turbine in the algorithm of this embodiment do not exist independently and are interrelated. The greater the wind turbine wind speed does not mean that the wind speed influence index is lower. The influence of the impeller radius should also be comprehensively considered. The faster the wind turbine wind speed and 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 action of wind speed change or external disturbance, the aerodynamic damping can more effectively absorb and dissipate the vibration energy of the system, enabling the system to return to the equilibrium state faster. The parameters of the algorithm of this embodiment need to jointly consider the influence on the results.

[0048] Specifically, assume that the wind speed deviation ratio is in the range of 0.01 - 0.1, and the aerodynamic damping force deviation ratio is in the range of 0.06 - 0.1, such as Figure 4As shown, it is a statistical chart of the change of the wind speed influence index provided by the embodiment of the present application. Among them, (a) is the change chart of the wind speed deviation ratio. It can be seen from the figure that when the pneumatic damping force deviation ratio is fixed at 0.06, as the wind speed deviation ratio gradually increases, the wind speed influence index gradually decreases. (b) is the change chart of the pneumatic damping force deviation ratio. It can be seen from the figure that when the wind speed deviation ratio is fixed at 0.01, as the pneumatic damping force deviation ratio gradually increases, the wind speed influence index gradually decreases, which means that the influence degree of the wind speed on the safe operation of the wind turbine gradually decreases, and the stability of the wind turbine operation gradually improves; the influence degree of the wind speed on the safe operation of the wind turbine is quantified, and further the accuracy of controlling the safe operation of the wind turbine 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 turbine speed. The initial wind energy density is used to reflect the power generation situation of the wind turbine; The initial wind energy density deviation value is obtained by performing an addition operation on the initial wind energy density and the preset maximum wind energy density threshold. The initial wind energy density deviation value is represented by the result of the addition operation of the initial wind energy density and the preset maximum wind energy density threshold; The wind energy density deviation ratio (i.e., in the limit expression of the power generation evaluation index) is obtained by performing a ratio calculation on the initial wind energy density deviation value and twice the preset maximum wind energy density threshold. The wind energy density deviation ratio is used to reflect the deviation situation of the power generation of the wind turbine; The power generation evaluation index is obtained by combining the wind energy density deviation ratio and the wind speed influence index not greater than the preset wind speed evaluation threshold.

[0050] Among them, the limit expression of the 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 the preset time points, represents the wind turbine speed of the wind turbine at the i-th preset time point, represents the wind energy density deviation ratio of the wind turbine at the i-th preset time point, represents the wind speed influence index not greater than the preset wind speed evaluation threshold of the wind turbine at the i-th preset time point, represents the preset maximum wind energy density threshold, represents the air density, and e represents the natural constant.

[0054] The algorithm of this embodiment comprehensively analyzes the wind speed of the wind turbine and the wind speed influence index 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 and are interrelated. The greater the wind speed of the wind turbine does not mean the higher the power generation evaluation index. The influence of the wind speed influence index should also be comprehensively considered. 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 condition, which may lead to greater wind energy density, meaning that the energy contained in the airflow passing through the blades of the wind turbine per unit time is more. Therefore, the generator can generate more electric energy, thereby increasing the power generation evaluation index. The parameters of the algorithm of this embodiment need to jointly consider the influence on the result at the same time.

[0055] Specifically, assume that the wind energy density deviation ratio ranges from 0.06 to 0.1, and the wind speed influence index not greater than the preset wind speed evaluation threshold ranges from 0.01 to 0.1. As shown in Table 1, it is the change statistical table of the power generation evaluation index provided by the embodiment of the present application:

[0056] Table 1 Change Statistical Table of Power Generation Evaluation Index

[0057]

[0058] As can be seen from Table 1 above, as the wind energy density deviation ratio gradually increases and the wind speed influence index not greater than the preset wind speed evaluation threshold gradually decreases, the power generation evaluation index gradually increases, indicating that the power generation capacity of the wind turbine gradually increases; it realizes the quantification of the power generation situation of the wind turbine, and further realizes the improvement of the accuracy of controlling the safe operation of the wind turbine.

[0059] Further, the specific process of judging whether to adjust the power generation based on the power generation evaluation index is as follows: First step, 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; Second step, send a prompt to the preset person to increase the operation speed of the wind turbine by a preset multiple until the maximum preset 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; Third step, send a prompt to the preset person to decrease the blade angle of the wind turbine by a preset multiple until the minimum preset 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 the operation.

[0060] In this embodiment, the preset power generation threshold is represented by the variance of the power generation of the wind turbine during the historical time period in the preset database, the preset maximum rotational speed is represented by the maximum value of the rotational speed of the wind turbine during the historical time period in the preset database, and the preset minimum angle is represented by the minimum value of the blade angle of the wind turbine during the historical time period in the preset database.

[0061] It should be understood that increasing the operating rotational speed of the wind turbine can enable it to capture more wind energy and thus convert it into more electrical energy. Because when the wind speed increases, the wind force received by the wind turbine will also increase accordingly. At this time, if the operating rotational speed remains unchanged, it may cause the wind turbine to be overloaded or damaged. Increasing the operating rotational speed can better match the change in wind speed and keep the wind turbine operating efficiently. When the wind speed is greater, if the blade angle is larger, it may cause the wind turbine to receive a greater wind force impact, thereby increasing the wear and failure risk of mechanical components. Reducing the blade angle can reduce the wind force impact received by the wind turbine, reduce mechanical wear, and extend the service life of the wind turbine. The control system has a fail-safe mechanism, and any failure of sensors or starting components does not affect the safe shutdown of the wind turbine; the accuracy of controlling the safe operation of the wind turbine is improved.

[0062] Further, the specific process of obtaining the load evaluation index is as follows: combining the obtained air density, impeller radius, and wind turbine wind speed to obtain the initial wind load, where the initial wind load is used to reflect the pressure situation generated by air flow on the wind turbine; performing an addition operation on the initial wind load and the preset maximum load threshold 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; performing a ratio operation on the initial load deviation value and twice the preset maximum load threshold to obtain the load deviation ratio (i.e., in the limit expression of the load evaluation index ), and the load deviation ratio is used to reflect the pressure deviation situation generated by air flow on the wind turbine; combining the load deviation ratio and the wind speed influence index greater than the preset wind speed evaluation threshold to obtain the load evaluation index.

[0063] Among them, the limit expression of the load evaluation index is as follows:

[0064] ;

[0065] ;

[0066] 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, Denote the wind speed impact index of the wind turbine at the \(i\)-th preset time point that is greater than the preset wind speed evaluation threshold. Denote the wind speed of the wind turbine at the \(i\)-th preset time point. Denote the impeller radius of the wind turbine at the \(i\)-th preset time point. Denote the air density. Denote the preset maximum load threshold, and \(e\) represents the natural constant.

[0067] In this embodiment, the algorithm of this embodiment comprehensively analyzes the wind speed of the wind turbine, the impeller radius, and the wind speed impact index to obtain the load evaluation index. The wind speed of the wind turbine, the impeller radius, and the wind speed impact index in the algorithm of this embodiment do not exist independently and are interrelated. The larger the wind speed impact index does not mean the larger the load evaluation index. The influence of the wind speed of the wind turbine and the impeller radius should also be comprehensively considered. When the wind speed is lower, if the impeller radius is larger, it will increase the load of the wind turbine, which may lead to an increase in mechanical stress and thermal stress, and then lead to unstable operation of the wind turbine, thereby affecting the power generation efficiency and operation safety. The parameters of the algorithm of this embodiment need to jointly consider the influence on the result at the same time; it realizes the quantification of the load condition of the wind turbine, and then realizes the improvement of the accuracy of controlling the safe operation of the wind turbine.

[0068] It should be understood that Generally take 3.14. The preset maximum load threshold is represented by the maximum value of the wind turbine operation load in the historical time period in the preset database. The preset load threshold is represented by the variance of the wind turbine operation load in the historical time period in the preset database. The preset minimum rotation speed is represented by the minimum value of the wind turbine operation rotation speed in the historical time period in the preset database. The preset maximum angle is represented by the maximum value of the wind turbine operation blade angle in the historical time period in the preset database.

[0069] Furthermore, the specific process of judging whether to perform load adjustment based on the load evaluation index is as follows: SS1, judge 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, continue to monitor the operation of the wind turbine. Otherwise, execute SS2; SS2, send a prompt to the preset personnel to reduce the operation rotation speed of the wind turbine by a preset multiple until the preset minimum rotation speed. When the monitored load evaluation index is not greater than the preset load threshold, continue to monitor the operation of the wind turbine. Otherwise, execute SS3; SS3, send 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 evaluation index is not greater than the preset load threshold, continue to monitor the operation of the wind turbine. Otherwise, judge it as unsafe operation and send a prompt to stop running.

[0070] In this embodiment, when the wind speed is lower, if the operating speed of the wind turbine is higher, it may cause excessive stress on mechanical components, resulting in wear or damage. By reducing the operating speed, the stress on these mechanical components can be reduced, and increasing the blade angle can enable the blades to capture wind energy better. This is because the change in the blade angle affects the wind capture ability of the blades. By increasing the blade angle, the wind turbine can maintain a high power generation efficiency, achieving an improvement in the accuracy of controlling the safe operation of the wind turbine.

[0071] As Figure 5 shown, it is a schematic structural diagram of a control system based on the operation of a wind turbine provided by an embodiment of the present application. A control system based on the operation of a wind turbine provided by an embodiment of the present application includes a wind speed impact assessment module, a power generation assessment module, and a load assessment module: Among them, the wind speed impact assessment module is used to monitor the wind turbine in real time through a preset sensing device to obtain wind turbine data, and obtain a wind speed impact index according to the wind turbine data and reference wind turbine data. The wind speed impact index is used to evaluate the impact degree of the wind speed on the safe operation of the wind turbine; the power generation assessment module is used to judge 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, a power generation assessment index is obtained, and based on the power generation assessment index, it is judged whether to adjust the power generation amount. The power generation adjustment is used to adjust the power generation assessment index to not be lower than a preset power generation threshold. The power generation assessment index is used to evaluate 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 based on the load assessment index, it is judged whether to adjust the load. The load adjustment is used to adjust the load assessment index to not be greater than a preset load threshold. The load assessment index is used to evaluate the load situation of the wind turbine.

[0072] In this embodiment, the wind speed impact index, power generation assessment index, and load assessment index provided by the embodiment of the present application only analyze a single wind turbine. The wind speed impact assessment module monitors the wind turbine data in real time through a preset sensing device. When the wind speed impact index is not greater than the preset wind speed assessment threshold, the power generation assessment module starts to play a role. Based on the power generation assessment index, the power generation assessment module will judge whether power generation adjustment is required. 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, obtains the load assessment index to evaluate the load situation of the wind turbine, achieving an improvement in the accuracy of controlling the safe operation of the wind turbine.

[0073] The embodiment of the present application provides an electronic device. The electronic device includes a memory for storing computer program instructions and a processor for executing the program instructions. Among them, 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.

[0074] In this embodiment, the electronic device includes a memory for storing computer program instructions. The electronic device further includes a processor for executing the computer program instructions in the memory, thereby improving the accuracy of controlling the safe operation of the wind turbine generator set.

[0075] In summary, in the embodiment of the present application, the preset sensing device is used to monitor the wind turbine generator set in real time to obtain the data of the wind turbine generator set and the wind speed influence index, and then it is judged whether the wind speed influence index is greater than the preset wind speed evaluation threshold. When the wind speed influence index is not greater than the preset wind speed evaluation threshold, the power generation evaluation index is obtained and it is judged whether to adjust the power generation amount. When the wind speed influence index is greater than the preset wind speed evaluation threshold, the load evaluation index is obtained and it is judged whether to adjust the load. Thereby, the dynamic monitoring of the operation state of the wind turbine generator set is realized, and further the accuracy of controlling the safe operation of the wind turbine generator set is improved, effectively solving the problem of inaccurate control of the safe operation of the wind turbine generator set in the prior art.

[0076] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can 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.

[0077] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, and the combination of processes and / or blocks in the flowchart and / or block diagram, can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate means for realizing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0078] These computer program instructions can also be stored in a computer-readable memory capable of guiding a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including instruction means, and the instruction means realizes the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0079] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus, so that a series of operation steps are executed on the computer or other programmable apparatus to produce a computer-implemented process, and thus the instructions executed on the computer or other programmable apparatus provide steps for implementing the functions specified in one process or a plurality of processes and / or blocks Figure 1 one process or a plurality of processes and / or blocks Figure 1 steps for implementing the functions specified in one block or a plurality of blocks.

[0080] Although the preferred embodiments of the present invention have been described, additional changes and modifications can be made by those skilled in the art once they learn the basic creative concept. Therefore, the appended claims are intended to be construed to cover the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0081] 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 equivalent technologies, 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, obtaining a load assessment index, and judging whether to perform load adjustment based on the load assessment index, wherein the load adjustment is used to adjust the load assessment index to be no greater than a preset load threshold, and the load assessment index is used to assess the load condition of the wind turbine; 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 data includes a preset maximum damping force threshold, a preset maximum wind speed threshold, air density and a drag coefficient; The limiting expression of the wind speed impact index is as follows: In the formula, It represents the wind speed impact index of the wind turbine at the i-th preset time point, i=1,2,...,k, i represents the number of the preset time point, k represents the total number of preset time points, FS i It represents the wind speed deviation ratio of the wind turbine at the i-th preset time point, QD i 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, ρ represents the air density, d represents the drag coefficient, QD0 represents the preset maximum damping force threshold, FS0 represents the preset maximum wind speed threshold, and e represents the natural constant.

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 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.

4. A control method based on the operation of a wind turbine as claimed in claim 3, 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.

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 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.

6. A control method based on the operation of a wind turbine as claimed in claim 5, 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.

7. A control system based on the control method for wind turbine operation according to claim 1, 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.

8. 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 1-6.

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