Method for determining fault information of wind turbine generator set

Abstract

The present application discloses a method for determining fault information of a wind turbine generator set. The method includes: obtaining the rotation speed, active power and apparent power of the wind turbine generator set; when the rotation speed is less than the rated rotation speed, the active power is greater than zero and the apparent power is less than the rated apparent power, determining the actual angle of attack of the wind turbine blades of the wind turbine generator set from the span to the target position, and determining the difference between the actual angle of attack and the target angle of attack; comparing the difference with a preset value to obtain a comparison result, and determining the fault information of the wind turbine blade according to the comparison result, wherein the fault information includes: the location where the wind turbine blade fails and the cause of the fault. The present application solves the technical problems that the fault state of a wind turbine generator set determined by comparing power curves in the related art has inaccurate test results, cannot locate the specific fault location, cannot give a clear cause of the fault, and the test process is complicated and labor costs are high.

Description

Technical Field

[0001] The present application relates to the field of fault diagnosis, and in particular to a method for determining fault information of a wind turbine generator set. Background Art

[0002] In the related art, the method for evaluating the efficiency of a wind turbine generator set is to actually test the power curve of the wind turbine generator set. Compared with the guaranteed power curve provided by the manufacturer, this method has the following disadvantages:

[0003] (1) The wind measuring device is installed on the nacelle behind the blades. It can only measure the wind speed and direction at a fixed position behind the blades, but cannot measure the wind speed and direction at any position in front of the blades. Therefore, the wind speed measured by the wind measuring device for calculating the power curve is necessarily inaccurate.

[0004] (2) It can only diagnose the abnormal efficiency of wind turbines as a whole, but cannot locate the specific fault location and the cause of the abnormal fault;

[0005] (3) The testing process is complex and time-consuming, and requires air density correction. It usually requires a professional team to conduct tests regularly, and it is impossible to evaluate the efficiency of the wind turbine in real time.

[0006] In summary, when testing the fault status of wind turbines in related technologies, there are technical problems such as inaccurate test results, inability to locate the specific fault location, and inability to give a clear fault cause, as well as complex testing process and high labor costs.

[0007] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0008] An embodiment of the present application provides a method for determining fault information of a wind turbine generator set, so as to at least solve the technical problems that the fault status of a wind turbine generator set is determined based on comparing power curves in the related art, such as inaccurate test results, inability to locate the specific fault location, inability to give a clear cause of the fault, complex testing process, and high labor costs.

[0009] According to one aspect of an embodiment of the present application, a method for determining fault information of a wind turbine generator set is provided, comprising: determining an actual angle of attack of a wind turbine blade of the wind turbine generator set from a span to a target position, wherein the target position is an arbitrary position randomly selected; obtaining a target angle of attack corresponding to the target position, and determining a difference between the actual angle of attack and the target angle of attack; comparing the difference with a preset value to obtain a comparison result, and determining the fault information of the wind turbine blade according to the comparison result, wherein the fault information includes: a location where the wind turbine blade fails and a cause of the failure.

[0010] Optionally, determining the actual angle of attack of the wind turbine blades of the wind turbine generator set toward the target position includes: obtaining the installation angle of the wind turbine blades, wherein the installation angle is the angle between the chord length of the wind turbine blades and the rotation plane; obtaining the inflow angle of the wind blades, wherein the inflow angle is the angle between the relative wind and the rotation plane; and obtaining the actual angle of attack based on the difference between the installation angle and the inflow angle.

[0011] Optionally, obtaining the installation angle of the wind blade includes: retrieving a design pattern of the wind turbine generator set; analyzing the design pattern to obtain a torsion angle corresponding to the wind blade when the wind blade in the design pattern is at a first pitch angle; obtaining a second pitch angle corresponding to the wind blade at a target position; and obtaining the installation angle according to the second pitch angle and the torsion angle.

[0012] Optionally, obtaining the installation angle according to the second pitch angle and the torsion angle includes: performing a sum operation on the second pitch angle and the torsion angle to obtain a sum result; and determining the sum result as the installation angle.

[0013] Optionally, obtaining the inflow angle of the wind blade includes: detecting the vector wind speed at a target area of ​​the wind blade, wherein the vector wind speed includes: wind speed and wind direction; obtaining the vector linear velocity of the wind blade at any position; determining the vector inflow wind speed of the wind blade at any position based on the vector wind speed and the vector linear velocity, wherein the vector inflow wind speed includes: inflow wind speed and inflow angle.

[0014] Optionally, before detecting the vector wind speed at the target area of ​​the fan blades, the method further includes: detecting the incoming wind blowing toward the fan blades and determining the incoming wind direction of the incoming wind; and determining the area indicated by the incoming wind direction as the target area.

[0015] Optionally, the preset value includes: a first preset value and a second preset value. Before comparing the difference value with the preset value and obtaining the comparison result, the method also includes: dividing the fan blade along the span direction of the fan blade to obtain multiple sections of sub-fan blades; for the multiple sections of sub-fan blades, each section of the sub-fan blade is configured with a first preset value and a second preset value, wherein the first preset value is less than zero, the second preset value is greater than zero, the absolute values ​​corresponding to the first preset value and the second preset value have no size relationship, and the absolute values ​​corresponding to the first preset value and the second preset value are negatively correlated with the target distance, wherein the target distance is the distance between the sub-fan blade and the rotation center of the fan blade.

[0016] Optionally, a comparison result is obtained by comparing the difference with a preset value, and the fault information of the fan blade is determined according to the comparison result, including: determining the difference corresponding to each section of the fan blades; comparing the difference with a first preset value in each section of the fan blades; determining the target sub-fan blades in each section of the fan blades whose difference is less than the first preset value, determining the fault position of the fan blade to be the position corresponding to the target sub-fan blade in the fan blades, and determining the cause of the fault to be a small angle of attack.

[0017] Optionally, a comparison result is obtained by comparing the difference with a preset value, and the fault information of the fan blade is determined according to the comparison result, including: determining the difference corresponding to each section of the fan blades; comparing the difference with a second preset value in each section of the fan blades; determining the target sub-fan blades in each section of the fan blades whose difference is greater than the second preset value, determining the fault position of the fan blade to be the position corresponding to the target sub-fan blade in the fan blades, and determining the cause of the fault to be a large angle of attack.

[0018] Optionally, the above method also includes: determining that the blade fan has not failed when it is determined that the difference in the blades of each section of the fan is greater than or equal to a first preset value; and determining that the difference in the blades of each section of the fan is less than or equal to a second preset value.

[0019] According to another aspect of an embodiment of the present application, a device for determining fault information of a wind turbine generator set is also provided, including: a first determination module, used to determine the actual angle of attack of a wind turbine blade of the wind turbine generator set from the span to a target position, wherein the target position is any position randomly selected; an acquisition module, used to obtain the target angle of attack corresponding to the target position, and determine the difference between the actual angle of attack and the target angle of attack; a second determination module, used to compare the difference with a preset value to obtain a comparison result, and determine the fault information of the wind turbine blade according to the comparison result, wherein the fault information includes: the location where the wind turbine blade fails and the cause of the failure.

[0020] According to another aspect of an embodiment of the present application, a non-volatile storage medium is also provided, the non-volatile storage medium including a stored program, wherein when the program is running, the device where the non-volatile storage medium is located is controlled to execute any method for determining fault information of a wind turbine generator set.

[0021] According to another aspect of the present application, a processor is further provided, and the processor is used to run a program, wherein when the program is run, any method for determining fault information of a wind turbine generator set is executed.

[0022] In an embodiment of the present application, the actual angle of attack is compared with the target angle of attack, and the rotational speed, active power and apparent power of the wind turbine are obtained; when the rotational speed is less than the rated rotational speed, the active power is greater than zero and the apparent power is less than the rated apparent power, the actual angle of attack of the wind turbine blades of the wind turbine is determined to the target position, wherein the target position is any position randomly selected; the target angle of attack corresponding to the target position is obtained, and the difference between the actual angle of attack and the target angle of attack is determined; the difference is compared with a preset value to obtain a comparison result, thereby achieving the purpose of determining the fault information of the wind turbine blade according to the comparison result, thereby realizing the technical effect of quickly locating the fault position and giving the fault cause, saving a lot of calculation processes, simplifying the data processing process, and saving labor costs, thereby solving the technical problems that the fault state of the wind turbine is determined based on the method of comparing power curves in the related technology, such as inaccurate test results, inability to locate the specific fault position, inability to give a clear fault cause, complex testing process, and high labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0024] Figure 1 is a flow chart of an optional method for determining fault information of a wind turbine generator set according to an embodiment of the present application;

[0025] Figure 2 is a schematic diagram of the overall process of a method for determining fault information of a wind turbine generator set according to an embodiment of the present application;

[0026] Figure 3 It is a structural schematic diagram of an optional device for determining fault information of a wind turbine generator set according to an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] According to an embodiment of the present application, an embodiment of a method for determining fault information of a wind turbine generator set is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0030] Figure 1 A method for determining fault information of a wind turbine generator set according to an embodiment of the present application is as follows: Figure 1 As shown, the method comprises the following steps:

[0031] Step S102, determining the actual angle of attack of the wind turbine blades of the wind turbine generator set toward the target position, wherein the target position is any position selected randomly;

[0032] Step S104, obtaining a target angle of attack corresponding to the target position, and determining a difference between the actual angle of attack and the target angle of attack;

[0033] Step S106, comparing the difference with a preset value to obtain a comparison result, and determining the fault information of the fan blade according to the comparison result, wherein the fault information includes: the location where the fan blade fails and the cause of the failure.

[0034] It should be noted that in some optional embodiments of the present application, in order to ensure the safe operation of the wind turbine generator set, before determining the actual angle of attack, the speed, active power and apparent power of the wind turbine generator set can be obtained, and when the speed is less than the rated speed, the active power is greater than zero and the apparent power is less than the rated apparent power, the actual angle of attack of the wind turbine blades at any position of the wind turbine generator set can be determined.

[0035] In the method for determining the fault information of the wind turbine generator set, the actual angle of attack of the wind turbine blades of the wind turbine generator set to the target position is determined, wherein the target position is any randomly selected position; the target angle of attack corresponding to the target position is obtained, and the difference between the actual angle of attack and the target angle of attack is determined; the difference is compared with a preset value to obtain a comparison result, and the fault information of the wind turbine blade is determined according to the comparison result, wherein the fault information includes: the position where the wind turbine blade fails and the cause of the failure, thereby achieving the technical effect of quickly locating the fault position and giving the cause of the failure, saving a lot of calculation processes, simplifying the data processing process, and saving labor costs, thereby solving the technical problems that the fault state of the wind turbine generator set determined by comparing power curves in the related technology has inaccurate test results, cannot locate the specific fault position, cannot give a clear fault cause, and the test process is complicated and the labor cost is high.

[0036] It should be noted that the above target angle of attack is an optimal angle of attack, which can be determined through a blade wind tunnel test or based on manual experience.

[0037] In some optional embodiments of the present application, the actual angle of attack of the wind turbine blades of the wind turbine generator set from the span to the target position can be determined by the following steps: specifically, the installation angle of the wind turbine blades is obtained, wherein the installation angle is the angle between the chord length of the wind turbine blades and the rotation plane; the inflow angle of the wind turbine blades is obtained, and it should be noted that the inflow angle is the angle between the relative wind and the rotation plane, and then the actual angle of attack is obtained according to the difference between the installation angle and the inflow angle. That is, the actual angle of attack = inflow angle - installation angle.

[0038] In some embodiments of the present application, the installation angle of the wind blade can be obtained in the following manner. Specifically, the method can be to retrieve a design pattern of the wind turbine generator set; analyze the design pattern to obtain the torsion angle corresponding to the wind blade when the wind blade in the design pattern is a first pitch angle; obtain the second pitch angle corresponding to the wind blade at the target position, and then obtain the installation angle based on the second pitch angle and the torsion angle.

[0039] For example, obtain the blade design drawing, and calculate the chord length of each position of the blade span and the torsion angle of the rotation plane according to the blade design drawing when the first pitch angle of the blade is zero. It should be noted that the second pitch angle and the torsion angle can be summed to obtain the sum result; determine the sum result as the above-mentioned installation angle, that is, the installation angle of each position of the blade span = the second pitch angle + the torsion angle. It is easy to notice that the above-mentioned first pitch angle is the selected reference angle of the blade in the design drawing. For the convenience of calculation, the preferred default value is zero. It can be understood that if the first pitch angle is not zero, the installation angle of each position of the blade span = the second pitch angle + the torsion angle - the first pitch angle, and the second pitch angle is a real-time, dynamic pitch angle.

[0040] In some optional embodiments of the present application, the inflow angle of the wind blade can be obtained in the following manner, specifically: detecting the vector wind speed at the target area of ​​the wind blade, wherein the vector wind speed includes: wind speed and wind direction; obtaining the vector linear velocity of the wind blade at any position; determining the vector inflow wind speed of the wind blade at any position based on the vector wind speed and the vector linear velocity. It should be noted that the vector inflow wind speed includes: inflow wind speed and inflow angle.

[0041] It should be noted that before detecting the vector wind speed at the target area of ​​the fan blade, it is necessary to detect the incoming wind blowing toward the fan blade, determine the incoming wind direction, and then determine the area indicated by the incoming wind direction as the target area. Generally, the target area can be called the front position of the blade. For example, if the wind direction is from left to right, the area on the left side of the blade is determined to be the front position of the blade, that is, the area where the blade is first affected by the wind.

[0042] In some embodiments of the present application, the preset value includes: a first preset value and a second preset value. Therefore, before comparing the difference value with the preset value and obtaining the comparison result, the fan blade can be divided along the span direction of the fan blade to obtain multiple sub-sections of fan blades; for the multiple sub-sections of fan blades, each sub-section of the fan blade is configured with a first preset value and a second preset value, wherein the first preset value is less than zero, the second preset value is greater than zero, and the absolute values ​​corresponding to the first preset value and the second preset value are negatively correlated with the target distance. It is easy to notice that the signs of the first preset value and the second preset value are opposite, and the absolute values ​​corresponding to the first preset value and the second preset value have no size relationship.

[0043] It should be noted that the target distance is the distance between the sub-fan blade and the rotation center of the fan blade. For example, the first preset value is a, the second preset value is b, the blade is divided into n sections along the span direction (n is an integer greater than 1), and different constants a and b are set for each section, where (a<0, b>0). It can be understood that the absolute value of the constant will decrease as the distance between the section and the rotation center increases (that is, the absolute values ​​corresponding to the first preset value and the second preset value are negatively correlated with the target distance).

[0044] In some embodiments of the present application, the comparison result is obtained by comparing the difference with the preset value, and the fault information of the fan blade is determined according to the comparison result, including: determining the difference corresponding to each section of the fan blade; comparing the difference with the first preset value in each section of the fan blade; determining the target sub-fan blade in each section of the fan blade whose difference is less than the first preset value, determining the fault position of the fan blade as the position corresponding to the target sub-fan blade in the fan blade, and determining the cause of the fault as a small angle of attack. For example, when the d of a certain section is less than the fixed value a corresponding to the section, an alarm of "abnormal efficiency of blade XX section (small angle of attack)" is issued.

[0045] In other embodiments of the present application, the comparison result is obtained by comparing the difference with the preset value, and the fault information of the fan blade is determined according to the comparison result, including: determining the difference corresponding to each section of the fan blade; comparing the difference with the second preset value in each section of the fan blade; determining the target sub-fan blade in each section of the fan blade whose difference is greater than the second preset value, determining the fault position of the fan blade as the position corresponding to the target sub-fan blade in the fan blade, and determining the cause of the fault as a large angle of attack. For example, when the d of a certain section is greater than the fixed value b corresponding to the section, an alarm of "abnormal efficiency of blade XX section (large angle of attack)" is issued.

[0046] It can be understood that when it is determined that the difference in the blades of each section of the fan is greater than or equal to the first preset value, and the difference in the blades of each section of the fan is less than or equal to the second preset value, it can be determined that the blade fan has not failed.

[0047] To facilitate those skilled in the art to better understand, the method for determining fault information of a wind turbine generator set disclosed in the present application is now described in its entirety. Figure 2 FIG. 1 is a schematic diagram of the overall flow of the method for determining the fault information, such as Figure 2 As shown, the method may include:

[0048] 1. Install a wind laser radar in front of the wind turbine to measure and record the vector wind speed at any position in front of the wind turbine blades (i.e. the blade target area) in real time. (including wind speed and direction);

[0049] 2. Draw the vector linear velocity at any position of the blade according to the speed of the wind turbine, the distance from any position on the blade to the rotation center, and the azimuth of the blade rotation plane. Calculate the vector inflow wind speed at any position in front of the blade. The vector inflow wind speed includes the inflow wind speed and the inflow angle.

[0050] 3. According to the blade design drawings, calculate the chord length of the blade at each position in the span direction and the torsion angle θ of the rotation plane when the pitch angle is zero. The installation angle of the blade at each position in the span direction = pitch angle + torsion angle;

[0051] 4. Calculate the angle of attack of the blade at any position in the span direction (i.e., the actual angle of attack), angle of attack = inflow angle - installation angle;

[0052] 5. When the speed of the wind turbine is lower than the rated speed, the active power is greater than zero and the apparent power is less than the rated apparent power, calculate the difference d between the angle of attack at any position in the blade span and the optimal angle of attack (i.e., target angle of attack) at that position. The optimal angle of attack can be obtained by the blade wind tunnel test;

[0053] 6. Divide the blade into n sections along the span direction (n is an integer greater than 1), set different constants a and b (a<0, b>0) for each section, and the absolute value of the constant decreases as the distance between the section and the rotation center increases. When the d of a section is less than the constant a corresponding to the section, an "abnormal efficiency of blade XX section (small angle of attack)" alarm is issued; when the d of a section is greater than the constant b corresponding to the section, an "abnormal efficiency of blade XX section (large angle of attack)" alarm is issued.

[0054] It is easy to notice that in the relevant embodiments of the present application, the measured wind speed and wind direction are the wind speed and wind direction at any position in front of the blade, which ensures the accuracy of the diagnosis from the source, and can diagnose the aerodynamic efficiency anomaly and the cause of the anomaly (the angle of attack is too large or too small) at any position of the blade, thereby improving the refinement of the diagnosis; and it uses the angle of attack as the main diagnostic criterion, without the need for air density correction, and the diagnostic results are output in real time, which improves the timeliness of the diagnosis and simplifies the data processing process.

[0055] Figure 3 A device for determining fault information of a wind turbine generator set according to an embodiment of the present application is provided. Figure 3 As shown, the device comprises:

[0056] A first determination module 40 is used to determine an actual angle of attack of a wind turbine blade of a wind turbine generator set toward a target position, wherein the target position is an arbitrary position selected randomly;

[0057] An acquisition module 42 is used to acquire a target angle of attack corresponding to a target position and determine a difference between an actual angle of attack and a target angle of attack;

[0058] The second determination module 44 is used to compare the difference with a preset value to obtain a comparison result, and determine the fault information of the fan blade according to the comparison result, wherein the fault information includes: the location where the fan blade fails and the cause of the failure.

[0059] In the device for determining fault information of the wind turbine generator set, a first determination module 40 is used to determine the actual angle of attack of the wind turbine blade of the wind turbine generator set to the target position, wherein the target position is any randomly selected position; an acquisition module 42 is used to obtain the target angle of attack corresponding to the target position, and determine the difference between the actual angle of attack and the target angle of attack; a second determination module 44 is used to compare the difference with a preset value to obtain a comparison result, and determine the fault information of the wind turbine blade according to the comparison result, wherein the fault information includes: the location where the wind turbine blade fails and the cause of the fault, thereby achieving the technical effect of quickly locating the fault location and giving the cause of the fault, saving a lot of calculation processes, simplifying the data processing process, and saving labor costs, thereby solving the technical problems that the fault state of the wind turbine generator set determined based on the comparison of power curves in the related technology has inaccurate test results, cannot locate the specific fault location, cannot give a clear fault cause, and the test process is complicated and the labor cost is high.

[0060] According to another aspect of an embodiment of the present application, a non-volatile storage medium is also provided, the non-volatile storage medium including a stored program, wherein when the program is running, the device where the non-volatile storage medium is located is controlled to execute any method for determining fault information of a wind turbine generator set.

[0061] According to another aspect of the present application, a processor is further provided, and the processor is used to run a program, wherein when the program is run, any method for determining fault information of a wind turbine generator set is executed.

[0062] Specifically, the above storage medium is used to store program instructions for executing the following functions to achieve the following functions:

[0063] Determine the actual angle of attack of the wind turbine blade of the wind turbine generator set toward the target position, wherein the target position is any randomly selected position; obtain the target angle of attack corresponding to the target position, and determine the difference between the actual angle of attack and the target angle of attack; compare the difference with a preset value to obtain a comparison result, and determine the fault information of the wind turbine blade according to the comparison result, wherein the fault information includes: the location where the wind turbine blade fails and the cause of the failure.

[0064] Specifically, the processor is used to call the program instructions in the memory to implement the following functions:

[0065] Determine the actual angle of attack of the wind turbine blade of the wind turbine generator set toward the target position, wherein the target position is any randomly selected position; obtain the target angle of attack corresponding to the target position, and determine the difference between the actual angle of attack and the target angle of attack; compare the difference with a preset value to obtain a comparison result, and determine the fault information of the wind turbine blade according to the comparison result, wherein the fault information includes: the location where the wind turbine blade fails and the cause of the failure.

[0066] In the relevant embodiments of the present application, the actual angle of attack is compared with the target angle of attack, and the rotational speed, active power and apparent power of the wind turbine are obtained; when the rotational speed is less than the rated rotational speed, the active power is greater than zero and the apparent power is less than the rated apparent power, the actual angle of attack of the wind turbine blades of the wind turbine is determined to the target position, wherein the target position is any position randomly selected; the target angle of attack corresponding to the target position is obtained, and the difference between the actual angle of attack and the target angle of attack is determined; the difference is compared with the preset value to obtain a comparison result, thereby achieving the purpose of determining the fault information of the wind turbine blade according to the comparison result, thereby realizing the technical effect of quickly locating the fault position and giving the fault cause, saving a lot of calculation processes, simplifying the data processing process, and saving labor costs, thereby solving the technical problems that the fault state of the wind turbine is determined based on the method of comparing power curves in the related technology, such as inaccurate test results, inability to locate the specific fault position, inability to give a clear fault cause, complex testing process, and high labor costs.

[0067] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0068] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0069] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0070] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0071] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0072] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk and other media that can store program codes.

[0073] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A method for determining fault information of a wind turbine generator set, characterized in that: include: Determining an actual angle of attack of a wind turbine blade of the wind turbine generator set toward a target position, wherein the target position is an arbitrary position selected randomly; Obtaining a target angle of attack corresponding to the target position, and determining a difference between the actual angle of attack and the target angle of attack; Comparing the difference with a preset value to obtain a comparison result, and determining the fault information of the fan blade according to the comparison result, wherein the fault information includes: the location where the fan blade fails and the cause of the failure; Wherein, the preset value includes a first preset value and a second preset value; before comparing the difference value with the preset value to obtain the comparison result, the method further includes: dividing the fan blade along the span direction of the fan blade to obtain a plurality of sub-fan blades; The fault information of the fan blade is determined according to the comparison result, including: when the difference of the sub-fan blades is less than the first preset value, determining that the angle of attack of the target position is too small; when the difference of the sub-fan blades is greater than the second preset value, determining that the angle of attack of the target position is too large.

2. The method according to claim 1, characterized in that Determining the actual angle of attack of the wind turbine blades of the wind turbine generator set toward the target position includes: Obtaining an installation angle of the fan blade, wherein the installation angle is an angle between a chord length of the fan blade and a rotation plane; Acquire the inflow angle of the fan blade, wherein the inflow angle is the angle between the relative wind and the rotation plane; The actual angle of attack is obtained according to the difference between the installation angle and the inflow angle.

3. The method according to claim 2, characterized in that Obtaining the installation angle of the fan blade includes: Retrieving a design pattern of the wind turbine generator set; Analyzing the design pattern to obtain a torsion angle corresponding to the fan blade when the fan blade in the design pattern is at a first pitch angle; Acquire a second pitch angle corresponding to the wind turbine blade at the target position; The installation angle is obtained according to the second pitch angle and the twist angle.

4. The method according to claim 3, characterized in that Obtaining the installation angle according to the second pitch angle and the twist angle includes: performing a sum operation on the second pitch angle and the twist angle to obtain a sum result; The summation result is determined to be the installation angle.

5. The method according to claim 2, characterized in that: Obtaining the inflow angle of the wind blade, comprising: Detecting the vector wind speed at the target area of ​​the fan blade, wherein the vector wind speed includes: wind speed and wind direction; Obtaining the vector linear velocity of the fan blade at the arbitrary position; The vector inflow wind speed of the fan blade at the arbitrary position is determined according to the vector wind speed and the vector linear speed, wherein the vector inflow wind speed includes: the inflow wind speed and the inflow angle.

6. The method according to claim 5, characterized in that Before detecting the vector wind speed at the target area of ​​the wind turbine blade, the method further includes: Detecting the incoming air blowing toward the fan blades and determining the incoming wind direction of the incoming air; Determine that the area indicated by the inlet wind direction is the target area.

7. The method according to claim 1, characterized in that The method further comprises: For multiple sections of sub-fan blades, each section of the sub-fan blade is configured with the first preset value and the second preset value, wherein the first preset value is less than zero, the second preset value is greater than zero, the absolute values ​​corresponding to the first preset value and the second preset value have no size relationship, and the absolute values ​​corresponding to the first preset value and the second preset value are negatively correlated with the target distance, wherein the target distance is the distance between the sub-fan blade and the rotation center of the fan blade.

8. The method according to claim 7, characterized in that Comparing the difference with a preset value to obtain a comparison result, and determining the fault information of the fan blade according to the comparison result, including: Determine the difference corresponding to each section of fan blades; Comparing the difference with the first preset value in each section of fan blades; Determine the target sub-fan blade in each section of the sub-fan blades whose difference is less than the first preset value, determine the fault position of the fan blade to be the position corresponding to the target sub-fan blade in the fan blades, and determine the cause of the fault to be a small angle of attack.

9. The method according to claim 7, characterized in that: Comparing the difference with a preset value to obtain a comparison result, and determining the fault information of the fan blade according to the comparison result, including: Determine the difference corresponding to each section of fan blades; Comparing the difference with the second preset value in each section of fan blades; Determine the target sub-fan blades in each section of the sub-fan blades whose difference is greater than a second preset value, determine the fault position of the fan blade to be the position corresponding to the target sub-fan blade in the fan blades, and determine the cause of the fault to be a large angle of attack.

10. The method according to any one of claims 7 to 9, characterized in that: The method further comprises: When it is determined that the difference in each section of fan blades is greater than or equal to a first preset value, and when the difference in each section of fan blades is less than or equal to a second preset value, it is determined that the fan blades are not faulty.

11. A device for determining fault information of a wind turbine generator set, used to implement a method for determining fault information of the wind turbine generator set, characterized in that: include: A first determination module is used to determine an actual angle of attack of a wind turbine blade of the wind turbine generator set toward a target position, wherein the target position is an arbitrary position selected randomly; An acquisition module, used to acquire a target angle of attack corresponding to the target position, and determine a difference between the actual angle of attack and the target angle of attack; A second determination module is used to compare the difference with a preset value to obtain a comparison result, and determine the fault information of the fan blade according to the comparison result, wherein the fault information includes: the location where the fan blade fails and the cause of the failure, wherein the preset value includes a first preset value and a second preset value; before comparing the difference with the preset value to obtain the comparison result, the method also includes: dividing the fan blade along the span direction of the fan blade to obtain a plurality of sub-fan blades; determining the fault information of the fan blade according to the comparison result, including: when the difference of the sub-fan blade is less than the first preset value, determining that the angle of attack of the target position is too small; when the difference of the sub-fan blade is greater than the second preset value, determining that the angle of attack of the target position is too large.

12. A non-volatile storage medium, characterized in that: The non-volatile storage medium includes a stored program, wherein when the program is running, the device where the non-volatile storage medium is located is controlled to execute the method for determining fault information of a wind turbine generator set according to any one of claims 1 to 10.

13. A processor, characterized in that: The processor is used to run a program, wherein the program, when running, executes the method for determining fault information of a wind turbine generator set according to any one of claims 1 to 10.

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