Wind generating set blade rain erosion protection method, device and equipment and storage medium

Abstract

The invention provides a wind generating set blade rain erosion protection method, device and equipment and a storage medium. Rainfall data in each rainfall process and wind generating set blade rain erosion working condition parameters corresponding to each rainfall process are obtained; constructing a fatigue accumulated damage calculation model of the wind generating set blade, inputting the rainfall data and the rain erosion working condition parameters of the wind generating set blade into the fatigue accumulated damage calculation model, and outputting a fatigue accumulated damage result of the wind generating set blade; the fatigue accumulated damage result of the blades of the wind generating set is reduced by adjusting the rain erosion working condition parameters of the blades of the wind generating set, and rain erosion protection of the blades of the wind generating set is achieved. According to the method, the accumulated fatigue damage of the fan blade can be calculated, and an operation and maintenance decision and a control strategy for the wind generating set are provided.

Description

Technical Field

[0001] The present application relates to the field of vibration measurement technology, and in particular to a method, device, equipment and storage medium for protecting blades of a wind turbine generator set from rain erosion. Background Art

[0002] With the equalization of wind and thermal power prices in recent years, wind turbines have become larger and larger, blades have become longer and more flexible, and the tip speed of the blades has become faster and faster. Taking an impeller with a diameter of 180m as an example, when the rated impeller speed is 10-12RPM, the tip speed is between 94-113m / s. When the leading edge of the blade tip runs at such a high speed, it will be damaged by raindrops, wind and sand, resulting in reduced aerodynamic efficiency, loss of power generation, and threat to the service life of the blades. Among them, erosion caused by raindrops is the most important factor.

[0003] Currently, the main way to prevent rain erosion is to add a protective coating to the blades to resist corrosion. However, the protection of the protective coating cannot cover all wind farms. Because the temperature, rainfall amount, rainfall duration, and unit operating speed of each wind farm are different, it is impossible to estimate whether the service life of the leading edge of the blade tip of each wind farm can meet the full life cycle of use. It is impossible to guide operation and maintenance decisions, resulting in power loss of wind farm units. Summary of the Invention

[0004] The present application aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, the first purpose of this application is to propose a wind turbine blade rain erosion protection method, which aims to calculate the cumulative fatigue damage of wind turbine blades and provide operation and maintenance decision-making and control strategies for wind turbines.

[0006] The second objective of the present application is to provide a wind turbine blade rain erosion protection device.

[0007] The third objective of this application is to provide an electronic device.

[0008] The fourth object of this application is to provide a computer-readable storage medium.

[0009] To achieve the above objectives, the first embodiment of the present application provides a method for protecting blades from rain erosion in a wind turbine generator set, comprising:

[0010] Obtain rainfall data during each rainfall process and corresponding wind turbine blade rain erosion operating condition parameters during each rainfall process;

[0011] Construct a fatigue cumulative damage calculation model for wind turbine blades, input rainfall data and wind turbine blade rain erosion operating condition parameters into the fatigue cumulative damage calculation model, and output the fatigue cumulative damage results of wind turbine blades;

[0012] By adjusting the rain erosion operating parameters of wind turbine blades, the fatigue cumulative damage results of wind turbine blades can be reduced, thereby achieving rain erosion protection of wind turbine blades.

[0013] The rainfall data during each rainfall process and the wind turbine blade rain erosion parameters corresponding to each rainfall process are obtained, including:

[0014] Rain sensors are set up at designated locations of wind turbines to obtain raindrop diameter, raindrop density, and rain erosion time during each rainfall process as rainfall data for each rainfall process.

[0015] From the operating condition database of the wind turbine generator set, the blade sweep distance of the wind turbine generator set, the speed of raindrops landing on the blade surface and the wind turbine impeller speed corresponding to each rainfall process are extracted as the rain erosion operating condition parameters of the wind turbine generator set blades corresponding to each rainfall process.

[0016] Among them, when constructing the fatigue cumulative damage calculation model of the wind turbine blade, the fatigue cumulative damage calculation model of the wind turbine blade includes:

[0017] The actual raindrop number calculation module is used to determine the number of raindrops per unit area at the tip of the wind turbine blade during each rainfall and rain erosion period based on rainfall data and wind turbine blade rain erosion operating condition parameters;

[0018] The module for calculating the number of raindrops to be borne after conversion is used to determine the number of raindrops per unit area of ​​the tip of the wind turbine blade that can be borne according to the rain erosion time after each rainfall is converted to the standard rainfall based on the rainfall data and the wind turbine blade rain erosion working condition parameters;

[0019] The fatigue cumulative damage calculation module is used to determine the fatigue cumulative damage of the wind turbine blades based on the number of raindrops per unit area on the tip of the wind turbine blade during the rain erosion time of each rainfall, and the number of raindrops per unit area on the tip of the wind turbine blade corresponding to the rain erosion time after each rainfall is converted to standard rainfall.

[0020] Among them, the actual raindrop number calculation module calculates the number of raindrops borne per unit area of ​​the tip of the wind turbine blade during each rainfall and erosion time. Based on the theory that the number of raindrops borne per unit area of ​​the tip of the wind turbine blade is proportional to the distance swept by the wind turbine blade, the module obtains the raindrop density and rain erosion time of each rainfall process in the rainfall data, and at the same time obtains the distance swept by the wind turbine blade during each rainfall process in the rain erosion operating parameters of the wind turbine blade, and calculates the number of raindrops borne per unit area of ​​the tip of the wind turbine blade during each rainfall and erosion time.

[0021] Among them, the module for calculating the number of raindrops that can be borne per unit area of ​​the tip of the wind turbine blade after conversion, in the process of calculating the number of raindrops that can be borne per unit area of ​​the tip of the wind turbine blade corresponding to the rain erosion time after each rainfall is converted to the standard rainfall, obtains the raindrop diameter of each rainfall process in the rainfall data, and at the same time obtains the speed of raindrops falling on the blade surface during each rainfall process in the rain erosion working condition parameters of the wind turbine blade, and calculates the number of raindrops that can be borne per unit area of ​​the tip of the wind turbine blade corresponding to the rain erosion time after each rainfall is converted to the standard rainfall.

[0022] The calculation result of fatigue cumulative damage is a value between 0 and 1. When the calculation result is 1, it indicates the end of the blade life of the wind turbine generator set.

[0023] Among them, by adjusting the rain erosion operating parameters of wind turbine blades to reduce the fatigue cumulative damage results of wind turbine blades, including:

[0024] Reduce the wind turbine impeller speed in the wind turbine blade rain erosion operating parameters to reduce the wind turbine blade sweep distance;

[0025] Based on the theory that the number of raindrops per unit area on the tip of a wind turbine blade is proportional to the distance swept by the wind turbine blade, a reduction in the wind turbine blade sweep distance will result in a reduction in the number of raindrops per unit area on the tip of a wind turbine blade.

[0026] The reduction in the number of raindrops per unit area on the tip of the wind turbine blade leads to a reduction in the cumulative fatigue damage of the wind turbine blade, thereby achieving rain erosion protection for the wind turbine blade.

[0027] To achieve the above-mentioned purpose, the second embodiment of the present application proposes a wind turbine blade rain erosion protection device, comprising:

[0028] The data acquisition module is used to obtain the rainfall data during each rainfall process and the rain erosion working condition parameters of the wind turbine blades corresponding to each rainfall process;

[0029] The fatigue cumulative damage result calculation module is used to build a fatigue cumulative damage calculation model for wind turbine blades, input rainfall data and wind turbine blade rain erosion operating condition parameters into the fatigue cumulative damage calculation model, and output the fatigue cumulative damage results of the wind turbine blades;

[0030] The blade rain erosion protection module is used to reduce the fatigue cumulative damage results of the wind turbine blades by adjusting the rain erosion operating parameters of the wind turbine blades, thereby realizing rain erosion protection of the wind turbine blades.

[0031] To achieve the above-mentioned purpose, a third embodiment of the present application provides an electronic device, comprising: a processor, and a memory communicatively connected to the processor;

[0032] Memory stores computer-executable instructions;

[0033] The processor executes the computer-executable instructions stored in the memory to implement the method of the aforementioned technical solution.

[0034] To achieve the above-mentioned purpose, the fourth embodiment of the present application proposes a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are executed by a processor, they are used to implement the method of the above-mentioned technical solution.

[0035] Different from the existing technology, the present invention provides a wind turbine blade rain erosion protection method, device, electronic device, and storage medium. The method obtains rainfall data from each rainfall process and the corresponding wind turbine blade rain erosion operating condition parameters during each rainfall process; constructs a fatigue cumulative damage calculation model for the wind turbine blades, inputs the rainfall data and wind turbine blade rain erosion operating condition parameters into the fatigue cumulative damage calculation model, and outputs the fatigue cumulative damage results for the wind turbine blades. The wind turbine blade rain erosion operating condition parameters are adjusted to reduce the fatigue cumulative damage results, thereby achieving wind turbine blade rain erosion protection. The present invention can calculate the cumulative fatigue damage of wind turbine blades and provide operation and maintenance decision-making and control strategies for wind turbines.

[0036] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0038] Figure 1 A schematic flow chart of a method for protecting blades from rain erosion in a wind turbine generator set provided in an embodiment of the present application;

[0039] Figure 2 This is a structural schematic diagram of a wind turbine blade rain erosion protection device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0040] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0041] A method and device for protecting blades of a wind turbine generator set from rain erosion according to an embodiment of the present application will be described below with reference to the accompanying drawings.

[0042] Figure 1 This is a flow chart of a wind turbine blade rain erosion protection method provided in an embodiment of the present application. The method includes the following steps:

[0043] Step 101: Obtain rainfall data during each rainfall process and corresponding wind turbine blade rain erosion operating condition parameters during each rainfall process.

[0044] In an embodiment of the present invention, a rain sensor is set at a designated location of the site where the wind turbine generator set is located to obtain the raindrop diameter, raindrop density, and rain erosion time during each rainfall process as rainfall data during each rainfall process; at the same time, the blade sweeping distance of the wind turbine generator set corresponding to each rainfall process, the speed of raindrops falling on the blade surface, and the wind turbine impeller speed are extracted from the working condition database of the wind turbine generator set as the wind turbine generator set blade rain erosion working condition parameters corresponding to each rainfall process.

[0045] Step S102: constructing a fatigue cumulative damage calculation model for wind turbine blades, inputting rainfall data and wind turbine blade rain erosion operating condition parameters into the fatigue cumulative damage calculation model, and outputting fatigue cumulative damage results for wind turbine blades.

[0046] In an embodiment of the present invention, the fatigue cumulative damage calculation model of the wind turbine blade includes:

[0047] The actual raindrop number calculation module is used to determine the number of raindrops per unit area on the tip of the wind turbine blade during each rainfall and rain erosion time based on rainfall data and wind turbine blade rain erosion operating condition parameters.

[0048] Among them, the actual raindrop number calculation module calculates the number of raindrops borne per unit area of ​​the tip of the wind turbine blade during each rainfall and erosion time. Based on the theory that the number of raindrops borne per unit area of ​​the tip of the wind turbine blade is proportional to the distance swept by the wind turbine blade, the module obtains the raindrop density and rain erosion time of each rainfall process in the rainfall data, and at the same time obtains the distance swept by the wind turbine blade during each rainfall process in the rain erosion operating parameters of the wind turbine blade, and calculates the number of raindrops borne per unit area of ​​the tip of the wind turbine blade during each rainfall and erosion time.

[0049] Specifically, the number of raindrops borne by the blade tip of each wind turbine during each rainfall is calculated. The number of raindrops borne by the blade tip is proportional to the distance Vt swept by it, which can be expressed by the formula n j =a j V j t j Calculation, where j is the time of a rainfall, n j The number of raindrops per unit area during the rain erosion time, in units of 1 / m 2 , t j is the rain erosion time corresponding to this rainfall, in seconds; a j The density of raindrops corresponding to this rainfall, in units of 1 / m 3 .

[0050] The module for calculating the number of raindrops that can be borne after conversion is used for rainfall data and based on the rain erosion operating parameters of wind turbine blades to determine the number of raindrops that can be borne per unit area of ​​the wind turbine blade tip corresponding to the rain erosion time after each rainfall is converted to standard rainfall.

[0051] Specifically, the solution of the present invention deploys a calculator device at the wind farm station end, combines the rainfall sensor signals installed at the station and the operating data of the wind turbine, calculates the number of raindrops per unit area of ​​the blade tip leading edge during each rain erosion time, compares it with the number of raindrops that the blade tip coating can withstand per unit area, calculates the cumulative damage, and provides operation and maintenance decisions and wind turbine control strategies.

[0052] However, every rainfall is unique. The protective layer is in a specific aging state and temperature, and physical quantities such as rainfall intensity, raindrop diameter, and rainfall duration may vary. This results in the protective layer's protective duration or amount of rainfall being different each time it rains. The wind farm's simultaneous rainfall, both wind and rain, needs to be converted into rain-erosion rainfall under specific laboratory conditions for lifespan estimation. This conversion is based on the principle of damage equivalent substitution. By obtaining the raindrop diameter and the speed at which raindrops land on the blade surface for each rainfall event, the number of raindrops that can be tolerated by the standard rainfall corresponding to each rainfall conversion is determined.

[0053] The formula is:

[0054]

[0055] Among them, N ij The number of raindrops per unit area at the tip of the wind turbine blade can withstand during the rain erosion time after any rainfall is converted to the standard rainfall, d ij is the raindrop diameter corresponding to this rainfall, V ij is the speed at which raindrops fall on the leaf surface during this rainfall process.

[0056] The fatigue cumulative damage calculation module is used to determine the fatigue cumulative damage of the wind turbine blades based on the number of raindrops per unit area on the tip of the wind turbine blade during the rain erosion time of each rainfall, and the number of raindrops per unit area on the tip of the wind turbine blade corresponding to the rain erosion time after each rainfall is converted to standard rainfall.

[0057] Each rainfall event in a wind farm is considered a rain erosion process of varying intensity. Factors such as the aging state of the protective layer, temperature, relative velocity, and raindrop diameter are considered different rain erosion loads. The blade tip is considered the most severely eroded area, and damage there represents the end of the blade's rain erosion life. The fatigue cumulative damage formula is expressed as:

[0058]

[0059] D is the cumulative fatigue damage, which is dimensionless. When D reaches 1, it indicates that the life span has reached the end. m is the number of rainfalls.

[0060] Based on the above formula, damage accumulation can be calculated by the ratio of rainfall duration to the protectable duration, or by the ratio of the number of raindrops to the number of protectable raindrops. The calculated fatigue cumulative damage is a value between 0 and 1, with a value of 1 indicating the end of the wind turbine blade life.

[0061] Step S103: adjusting the wind turbine blade rain erosion operating parameters to reduce fatigue cumulative damage to the wind turbine blades, thereby achieving rain erosion protection for the wind turbine blades.

[0062] Based on the discussion of step S103, it can be seen that the fatigue cumulative damage is proportional to the number of raindrops per unit area during the rain erosion time. Therefore, the fatigue cumulative damage can be reduced and the life of the wind turbine blades can be increased by the following methods:

[0063] Reduce the wind turbine impeller speed in the wind turbine blade rain erosion operating parameters to reduce the wind turbine blade sweep distance;

[0064] Based on the theory that the number of raindrops per unit area on the tip of a wind turbine blade is proportional to the distance swept by the wind turbine blade, a reduction in the wind turbine blade sweep distance will result in a reduction in the number of raindrops per unit area on the tip of a wind turbine blade.

[0065] The reduction in the number of raindrops per unit area on the tip of the wind turbine blade leads to a reduction in the cumulative fatigue damage of the wind turbine blade, thereby achieving rain erosion protection for the wind turbine blade.

[0066] In order to implement the above embodiment, the present application also proposes a wind turbine blade rain erosion protection device.

[0067] Figure 2 A schematic structural diagram of a wind turbine blade rain erosion protection device provided in an embodiment of the present application.

[0068] like Figure 2 As shown, the device 300 includes:

[0069] The data acquisition module 310 is used to obtain rainfall data during each rainfall process and rain erosion parameters of wind turbine blades during each rainfall process;

[0070] The fatigue cumulative damage calculation module 320 is used to construct a fatigue cumulative damage calculation model for the blades of the wind turbine generator set, input rainfall data and rain erosion operating condition parameters of the blades of the wind turbine generator set into the fatigue cumulative damage calculation model, and output fatigue cumulative damage results for the blades of the wind turbine generator set;

[0071] The blade rain erosion protection module 330 is used to adjust the wind turbine blade rain erosion operating parameters to reduce the fatigue cumulative damage of the wind turbine blades and achieve wind turbine blade rain erosion protection.

[0072] It should be noted that the above explanation of the embodiment of the wind turbine blade rain erosion protection method is also applicable to the wind turbine blade rain erosion protection device of this embodiment, and will not be repeated here.

[0073] In order to implement the above embodiments, the present application also proposes an electronic device, comprising: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the method provided by the above embodiments.

[0074] In order to implement the above embodiments, the present application also proposes a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the methods provided by the above embodiments.

[0075] In order to implement the above embodiments, the present application also proposes a computer program product, including a computer program, which implements the methods provided by the above embodiments when executed by a processor.

[0076] The collection, storage, use, processing, transmission, provision and disclosure of user personal information involved in this application are in compliance with relevant laws and regulations and do not violate public order and good morals.

[0077] It is important to note that personal information collected from users should be used for legitimate and reasonable purposes and should not be shared or sold beyond these legitimate uses. Furthermore, such collection / sharing should be conducted only after receiving the user's informed consent, including but not limited to notifying the user to read the user agreement / user notice and sign an agreement / authorization that includes the relevant user information before using the feature. Furthermore, any necessary steps must be taken to safeguard and secure access to such personal information and ensure that others with access to personal information comply with its privacy policy and procedures.

[0078] This application contemplates providing implementations that allow users to selectively block the use or access of personal information data. Specifically, this disclosure contemplates providing hardware and / or software to prevent or block access to such personal information data. Risks can be minimized by limiting data collection and deleting data once it is no longer needed. Furthermore, where applicable, such personal information can be de-identified to protect user privacy.

[0079] In the descriptions of the foregoing embodiments, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are mutually inconsistent.

[0080] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0081] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0082] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and a portable compact disc read-only memory (CDROM). Furthermore, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing it in another suitable manner if necessary, and then storing it in a computer memory.

[0083] It should be understood that various parts of the present application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0084] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0085] In addition, the functional units in the various embodiments of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into a module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0086] The storage medium mentioned above may be a read-only memory, a magnetic disk, or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application. Persons skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A method for protecting blades from rain erosion in wind turbines, characterized in that: include: Obtain rainfall data during each rainfall process and corresponding wind turbine blade rain erosion operating condition parameters during each rainfall process; Constructing a fatigue cumulative damage calculation model for the blades of a wind turbine generator set, inputting the rainfall data and the rain erosion operating condition parameters of the blades of the wind turbine generator set into the fatigue cumulative damage calculation model, and outputting a fatigue cumulative damage result of the blades of the wind turbine generator set; By adjusting the rain erosion operating condition parameters of the wind turbine blades, the fatigue cumulative damage results of the wind turbine blades are reduced, thereby achieving rain erosion protection of the wind turbine blades.

2. The wind turbine blade rain erosion protection method according to claim 1, characterized in that: The acquisition of rainfall data during each rainfall process and the wind turbine blade rain erosion operating condition parameters corresponding to each rainfall process includes: By setting a rain sensor at a designated location of the wind turbine generator set, the raindrop diameter, raindrop density, and rain erosion time during each rainfall process are obtained as rainfall data during each rainfall process; From the operating condition database of the wind turbine generator set, the blade sweep distance of the wind turbine generator set, the speed of raindrops landing on the blade surface and the wind turbine impeller speed corresponding to each rainfall process are extracted as the wind turbine generator set blade rain erosion operating condition parameters corresponding to each rainfall process.

3. The wind turbine blade rain erosion protection method according to claim 2, characterized in that: When constructing the fatigue cumulative damage calculation model for the blades of a wind turbine generator set, the fatigue cumulative damage calculation model for the blades of the wind turbine generator set includes: an actual raindrop number calculation module, configured to determine the number of raindrops per unit area borne by the blade tip of the wind turbine generator set during each rainfall and rain erosion period based on the rainfall data and the wind turbine generator set blade rain erosion operating condition parameters; A module for calculating the number of raindrops to be borne after conversion is used to determine the number of raindrops per unit area of ​​the tip of the wind turbine blade that can be borne according to the rain erosion time after each rainfall is converted to standard rainfall based on the rainfall data and the wind turbine blade rain erosion working condition parameters; The fatigue cumulative damage calculation module is used to determine the fatigue cumulative damage of the wind turbine blades based on the number of raindrops per unit area on the tip of the wind turbine blade during the rain erosion time of each rainfall, and the number of raindrops per unit area that the tip of the wind turbine blade can withstand during the corresponding rain erosion time after each rainfall is converted to standard rainfall.

4. The wind turbine blade rain erosion protection method according to claim 3, characterized in that: In the process of calculating the number of raindrops borne per unit area of ​​the tip of the wind turbine blade during each rainfall and rain erosion time, the actual raindrop number calculation module calculates the number of raindrops borne per unit area of ​​the tip of the wind turbine blade during each rainfall and rain erosion time based on the theory that the number of raindrops borne per unit area of ​​the tip of the wind turbine blade is proportional to the distance swept by the wind turbine blade. By obtaining the raindrop density and rain erosion time of each rainfall process from the rainfall data, and at the same time obtaining the distance swept by the wind turbine blade during each rainfall process from the wind turbine blade rain erosion operating parameters, the number of raindrops borne per unit area of ​​the tip of the wind turbine blade during each rainfall and rain erosion time is calculated.

5. The wind turbine blade rain erosion protection method according to claim 3, characterized in that: The module for calculating the number of raindrops that can be borne per unit area of ​​the tip of the wind turbine blade corresponding to the rain erosion time after each rainfall is converted to the standard rainfall is used to calculate the number of raindrops that can be borne per unit area of ​​the tip of the wind turbine blade corresponding to the rain erosion time after each rainfall is converted to the standard rainfall. The module obtains the diameter of raindrops for each rainfall process from the rainfall data and the speed at which raindrops fall on the surface of the blade during each rainfall process from the rain erosion operating condition parameters of the wind turbine blade. The module calculates the number of raindrops that can be borne per unit area of ​​the tip of the wind turbine blade corresponding to the rain erosion time after each rainfall is converted to the standard rainfall.

6. The wind turbine blade rain erosion protection method according to claim 1, characterized in that: The calculation result of the fatigue cumulative damage is a value between 0 and 1. When the calculation result is 1, it indicates the end of the blade life of the wind turbine generator set.

7. The wind turbine blade rain erosion protection method according to claim 3, characterized in that: The method of reducing fatigue cumulative damage of the wind turbine blades by adjusting the rain erosion operating parameters of the wind turbine blades includes: Reducing the wind turbine impeller speed in the wind turbine blade rain erosion operating condition parameter to reduce the wind turbine blade sweep distance; Based on the theory that the number of raindrops per unit area on the tip of a wind turbine blade is proportional to the distance swept by the wind turbine blade, a reduction in the wind turbine blade sweep distance will result in a reduction in the number of raindrops per unit area on the tip of a wind turbine blade. The number of raindrops per unit area of ​​the tip of the wind turbine blade is reduced, which leads to a reduction in the fatigue cumulative damage of the wind turbine blade, thereby achieving rain erosion protection of the wind turbine blade.

8. A wind turbine blade rain erosion protection device, characterized in that: include: The data acquisition module is used to obtain the rainfall data during each rainfall process and the rain erosion working condition parameters of the wind turbine blades corresponding to each rainfall process; a fatigue cumulative damage result calculation module, configured to construct a fatigue cumulative damage calculation model for blades of a wind turbine generator set, input the rainfall data and the rain erosion operating condition parameters of the blades of the wind turbine generator set into the fatigue cumulative damage calculation model, and output a fatigue cumulative damage result for the blades of the wind turbine generator set; The blade rain erosion protection module is used to adjust the wind turbine blade rain erosion operating condition parameters to reduce the fatigue cumulative damage results of the wind turbine blades, thereby achieving rain erosion protection of the wind turbine blades.

9. An electronic device, characterized in that: include: a processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 7 when executed by a processor.

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