CN114658615A - Method for determining fault information of wind generating set - Google Patents

Abstract

The application discloses a method for determining fault information of a wind generating set. Wherein, the method comprises the following steps: acquiring the rotating speed, active power and apparent power of the wind generating set; determining an actual attack angle of a fan blade of the wind generating set in a spanwise direction target position under the conditions that the rotating speed is less than the rated rotating speed, the active power is greater than zero and the apparent power is less than the rated apparent power, and determining a difference value between the actual attack angle and the target attack angle; comparing the difference value 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 comprises: the position of the fan blade failure and the cause of the failure. The method and the device solve the technical problems that in the related art, the fault state of the wind generating set is determined based on a mode of comparing power curves, the test result is inaccurate, the specific fault position cannot be located, clear fault reasons cannot be given, the test process is complex, and the labor cost is high.

Description

Determination method of fault information of wind turbine

technical field

The present application relates to the field of fault diagnosis, and in particular, to a method for determining fault information of a wind turbine.

Background technique

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

(1) The wind measuring device is installed on the nacelle behind the blade. It can only measure the wind speed and wind direction at the fixed position behind the blade, but cannot measure the wind speed and wind direction at any position in front of the blade. Therefore, the wind speed measured by the wind measuring device must be calculated to draw a power curve. is inaccurate;

(2) It is only possible to diagnose the abnormal efficiency of the wind turbine as a whole, and it is impossible to locate the specific fault location and the cause of the abnormal fault;

(3) The test process is complicated and time-consuming, and air density correction is required. Usually, a professional team is required to conduct regular tests, and it is impossible to evaluate the efficiency of wind turbines in real time.

To sum up, when testing the fault state of a wind turbine in the related art, there are technical problems such as inaccurate test results, inability to locate the specific fault location, and to give a clear fault cause, complicated testing process, and high labor costs.

For the above problems, no effective solution has been proposed yet.

SUMMARY OF THE INVENTION

The embodiments of the present application provide a method for determining fault information of a wind turbine, so as to at least solve the problem of inaccurate test results in determining the fault state of a wind turbine based on a comparison power curve in the related art, and it is impossible to locate a specific fault. Location, can not give a clear cause of failure, and the testing process is complex, technical problems with high labor costs.

According to an aspect of the embodiments of the present application, a method for determining fault information of a wind turbine generator set is provided, including: determining an actual angle of attack of a target position of a fan blade of a wind turbine generator set in the spanwise direction, 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 the preset value to obtain the comparison result, and determine the fault information of the fan blade according to the comparison result. The information includes: where the fan blade failed and why.

Optionally, determining the actual angle of attack of the fan blade of the wind turbine in the spanwise target position includes: obtaining the installation angle of the fan blade, wherein the installation angle is the angle between the chord length of the fan blade and the rotation plane; The inflow angle, where 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.

Optionally, obtaining the installation angle of the fan blade includes: retrieving the design pattern of the wind turbine; analyzing the design pattern to obtain the twist angle corresponding to the fan blade when the fan blade in the design pattern is the first pitch angle; obtaining The second pitch angle corresponding to the fan blade at the target position; the installation angle is obtained according to the second pitch angle and the torsion angle.

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

Optionally, obtaining the inflow angle of the wind turbine blade includes: detecting the vector wind speed at the target area of the wind turbine blade, wherein the vector wind speed includes: wind speed and wind direction; obtaining the vector linear speed of the wind turbine blade at any position; The linear velocity determines the vector inflow wind speed at any position of the fan blade, wherein the vector inflow wind speed includes: the inflow wind speed and the inflow angle.

Optionally, before detecting the vector wind speed at the target area of the fan blade, the method further includes: detecting the incoming air blowing to the fan blade, determining the incoming air direction of the incoming air; and determining the area indicated by the incoming air direction as the target area.

Optionally, the preset value includes: the first preset value and the second preset value, before comparing the difference value and the preset value, and before obtaining the comparison result, the method further includes: along the fan blade The fan blades are divided in the span direction to obtain multi-segment sub-fan blades; for the multi-segment sub-fan blades, each 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 magnitude relationship, and the absolute values corresponding to the first preset value and the second preset value are the same as the target The distance is negatively correlated, wherein the target distance is the distance between the sub-fan blade and the rotation center of the fan blade.

Optionally, a comparison result is obtained by comparing the difference value and a preset value, and the fault information of the fan blade is determined according to the comparison result, including: determining the difference value corresponding to each section of the fan blade; The size of a preset value; determine the target sub-fan blade whose difference is less than the first preset value in each sub-fan blade, determine the fault position of the fan blade as the corresponding position of the target sub-fan blade in the fan blade, and determine the fault The reason is that the angle of attack is too small.

Optionally, a comparison result is obtained by comparing the difference value and a preset value, and the fault information of the fan blade is determined according to the comparison result, including: determining the difference value corresponding to each section of the fan blade; 2. The size of the preset value; determine the target sub-fan blade whose difference is greater than the second preset value in each sub-fan blade, determine the fault position of the fan blade as the corresponding position of the target sub-fan blade in the fan blade, and determine the fault The reason is that the angle of attack is too large.

Optionally, the above method further includes: in the case of determining that the difference between the sub-fan blades of each section is greater than or equal to the first preset value; and it is determined that the difference between the sub-fan blades of each section is less than or equal to the second preset value, determining the blade. The fan has not failed.

According to another aspect of the embodiments of the present application, a device for determining fault information of a wind turbine generator set is also provided, comprising: a first determination module configured to determine the actual angle of attack of a fan blade of the wind turbine generator set spanwise to a target position, Wherein, the target position is any position randomly selected; the obtaining module 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; the second determination module is used to compare the difference with the preset A comparison result is obtained from the size of the fixed value, and fault information of the fan blade is determined according to the comparison result, wherein the fault information includes: the position where the fan blade fails and the cause of the fault.

According to another aspect of the embodiments of the present application, a non-volatile storage medium is also provided, where the non-volatile storage medium includes a stored program, wherein when the program runs, the device where the non-volatile storage medium is located is controlled to execute any arbitrary program. A method for determining fault information of a wind turbine.

According to another aspect of the present application, a processor is also provided, and the processor is used for running a program, wherein when the program is running, any method for determining fault information of a wind turbine is executed.

In the embodiment of the present application, the method of comparing the actual angle of attack with the target angle of attack is adopted to obtain the rotational speed, active power and apparent power of the wind turbine; 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 In the case of rated apparent power, determine the actual angle of attack of the wind turbine blade spanwise to the target position, where the target position is any position randomly selected; obtain the target angle of attack corresponding to the target position, and determine the actual angle of attack and the target The difference value of the angle of attack; compare the difference value and the preset value to get the comparison result, which achieves the purpose of determining the fault information of the fan blade according to the comparison result, thus realizing the rapid location of the fault, and giving the cause of the fault, saving a lot of money The calculation process simplifies the data processing process, saves the technical effect of labor costs, and solves the problem of inaccurate test results in determining the fault state of the wind turbine based on the comparison power curve in the related art, and it is impossible to locate the specific fault location. It is impossible to give a clear cause of the failure, and the testing process is complicated and the labor cost is high.

Description of drawings

The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the attached image:

1 is a schematic flowchart of an optional method for determining fault information of a wind turbine according to an embodiment of the present application;

2 is a schematic overall flow diagram of a method for determining fault information of a wind turbine according to an embodiment of the present application;

FIG. 3 is a schematic structural diagram of an optional device for determining fault information of a wind turbine according to an embodiment of the present application.

Detailed ways

In order to make those skilled in the art better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only The embodiments are part of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present application.

It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that data so used may be interchanged under appropriate circumstances so that the embodiments of the application described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having" and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

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

FIG. 1 is a method for determining fault information of a wind turbine according to an embodiment of the present application. As shown in FIG. 1 , the method includes the following steps:

Step S102, determining the actual angle of attack of the fan blade of the wind turbine in the spanwise direction of the target position, wherein the target position is any position randomly selected;

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

Step S106 , comparing the difference value with the 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 fault location of the fan blade and the cause of the fault.

It should be noted that, in some optional embodiments of the present application, in order to ensure the safe operation of the wind turbine, before the actual angle of attack is determined, the rotational speed, active power and apparent power of the wind turbine can be obtained, and the rotational speed 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 is determined.

In the method for determining the fault information of the wind turbine, the actual angle of attack of the wind turbine blade spanwise to the target position is determined, wherein the target position is any position randomly selected; the target angle of attack corresponding to the target position is obtained, and the The difference between the actual angle of attack and the target angle of attack; compare the difference and the 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 of the fault of the fan blade and the cause of the fault , so as to quickly locate the fault location, and give the cause of the fault, save a lot of calculation process, simplify the data processing process, and save the technical effect of labor cost, and then solve the problem of determining the wind turbine generator set based on the comparison power curve in the related art. There are technical problems such as inaccurate test results, inability to locate the specific fault location, inability to give a clear fault cause, complex testing process, and high labor costs.

It should be noted that the above-mentioned target angle of attack is the optimal angle of attack, and the optimal angle of attack may be determined through a blade wind tunnel experiment, or may be determined by manual experience.

In some optional embodiments of the present application, the actual angle of attack of the fan blade of the wind turbine in the spanwise target position can be determined by the following steps, specifically, the installation angle of the fan blade is obtained, wherein the installation angle is the chord length of the fan blade The included angle with the rotation plane; to obtain the inflow angle of the wind blade, 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, actual angle of attack=inflow angle-installation angle.

In some embodiments of the present application, the installation angle of the fan blade can be obtained in the following manner. Specifically, the method can be to retrieve the design pattern of the wind turbine; analyze the design pattern, and obtain that the fan blade in the design pattern is the first The twist angle corresponding to the fan blade at the pitch angle; obtain the second pitch angle corresponding to the fan blade at the target position, and then obtain the installation angle according to the second pitch angle and the twist angle.

For example, obtain the blade design drawing, and calculate the chord length of each position of the blade in the spanwise direction and the twist angle of the rotation plane when the first pitch angle of the blade is zero according to the blade design drawing. Perform a summation operation on the angle and the torsion angle to obtain the summation result; determine the summation result as the above installation angle, that is, the installation angle at each position of the blade span = second pitch angle + 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. In order to facilitate the calculation, the preferred default value is zero. It is understandable that if the first pitch angle is not zero, then The installation angle of each position in the spanwise direction of the blade = the second pitch angle + the twist angle - the first pitch angle, and the second pitch angle is a real-time, dynamic pitch angle.

In some optional embodiments of the present application, the inflow angle of the wind turbine blade can be obtained by the following methods, specifically: detecting the vector wind speed at the target area of the wind turbine blade, wherein the vector wind speed includes: wind speed and wind direction; The vector linear velocity of the position; the vector inflow wind speed of the fan blade at any position is determined according to the vector wind speed and the vector linear velocity. It should be noted that the vector inflow wind speed includes: the inflow wind speed and the inflow angle.

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 air to the fan blade, determine the incoming air direction of the incoming air, and then determine the area indicated by the incoming air 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 left area of the blade is determined as the front position of the blade, that is, the area where the blade is first affected by the wind.

In some embodiments of the present application, the preset value includes: a first preset value and a second preset value. Therefore, before comparing the size of the difference value and the preset value to obtain the comparison result, you can follow the The span direction of the fan blade divides the fan blade to obtain a multi-segment fan blade; for the multi-segment fan blade, each segment 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 predetermined value is greater than zero, and the absolute values corresponding to the first predetermined value and the second predetermined value are negatively correlated with the target distance. It is easy to notice that the first predetermined value and the second The signs of the preset values are opposite, and the absolute values corresponding to the first preset value and the second preset value have no magnitude relationship.

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 segments along the span (n is an integer greater than 1), and each segment is set with different constant values a and b, where ( a<0,b>0), it can be understood that the absolute value of the fixed value will decrease as the distance between the segment and the center of rotation increases (that is, the absolute values of the first predetermined value and the second predetermined fixed value are the same as target distance is negatively correlated).

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

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

It can be understood that when it is determined that the difference between the fan blades in each section is greater than or equal to the first preset value, and the difference between the fan blades in each section is less than or equal to the second preset value, it can be determined that the blade fan is not faulty.

In order to facilitate the better understanding of those skilled in the art, the method for determining the fault information of the wind turbine disclosed in the present application will now be described as a whole. A schematic flowchart, as shown in Figure 2, the method may include:

(包含风速和风向)；1. Install the wind-measuring lidar in front of the wind turbine to measure and record the vector wind speed at any position in front of the wind turbine blade (ie, the target area of the blade) in real time.

(including wind speed and direction);

计算出叶片前任意位置的矢量入流风速，该矢量入流风速包括入流风速和入流角，矢量入流风速

2. Draw the vector linear velocity at any position of the blade according to the rotational speed of the wind turbine, the distance from any position on the blade to the center of rotation, and the azimuth angle 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, and the vector inflow wind speed

3. Calculate the chord length of each position of the blade in the spanwise direction and the twist angle θ of the rotation plane under the condition that the pitch angle of the blade is zero according to the blade design drawing, and the installation angle of each position of the blade in the spanwise direction = pitch angle + torsion angle ;

4. Calculate the angle of attack of the blade at any position in the span (ie the actual angle of attack), the angle of attack = the inflow angle - the installation angle;

5. When the wind turbine speed 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 angle of attack at any position of the blade span and the best angle of attack at that position (that is, the target angle of attack) The difference d of , the optimal angle of attack can be obtained from the wind tunnel test of the blade;

6. Divide the blade into n sections along the span direction (n is an integer greater than 1), set different fixed values a and b (a<0,b>0) for each section, and the absolute value of the fixed value varies with the section and the The distance from the center of rotation increases and decreases. When the d of a certain segment is less than the fixed value a corresponding to the segment, the alarm of "Blade XX segment efficiency is abnormal (the angle of attack is too small)" will be issued. When the d of a certain segment is greater than the segment When the corresponding fixed value b is set, the alarm of "Blade XX section efficiency is abnormal (the angle of attack is too large)" is issued.

It is easy to notice that in the relevant embodiments of the present application, the measured wind speed and wind direction are those at any position in front of the blade, which ensures the accuracy of diagnosis from the source, and can diagnose the aerodynamic efficiency of any position of the blade. Abnormalities and abnormal causes (large or small angle of attack) improve the refinement of the diagnosis; and it uses the angle of attack as the main diagnosis criterion, without the need for air density correction, and the diagnosis results are output in real time, improving the timeliness of diagnosis to simplify data processing.

FIG. 3 is a device for determining fault information of a wind turbine according to an embodiment of the present application. As shown in FIG. 3 , the device includes:

The first determination module 40 is used for determining the actual angle of attack of the fan blade of the wind turbine in the spanwise direction of the target position, wherein the target position is any position randomly selected;

The obtaining module 42 is used for obtaining the target angle of attack corresponding to the target position, and determining the difference between the actual angle of attack and the target angle of attack;

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

In the device for determining the fault information of the wind turbine, the first determination module 40 is used to determine the actual angle of attack of the wind turbine blade spanwise to the target position, wherein the target position is any position randomly selected; the acquisition module 42 , 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; the second determination module 44 is used to compare the difference and the preset value to obtain a comparison result, and determine according to the comparison result The fault information of the fan blade, where the fault information includes: the fault location of the fan blade and the cause of the fault, so that the fault location can be quickly located, and the fault cause is given, which saves a lot of calculation process, simplifies the data processing process, and saves labor costs. It solves the problem of inaccurate test results, inability to locate the specific fault location, inability to give a definite fault cause, and complicated test process due to the inaccurate test results in determining the fault state of the wind turbine based on the comparison of the power curve in the related art. , technical problems of high labor cost.

According to another aspect of the embodiments of the present application, a non-volatile storage medium is also provided, where the non-volatile storage medium includes a stored program, wherein when the program runs, the device where the non-volatile storage medium is located is controlled to execute any arbitrary program. A method for determining fault information of a wind turbine.

According to another aspect of the present application, a processor is also provided, and the processor is used for running a program, wherein when the program is running, any method for determining fault information of a wind turbine is executed.

Specifically, the above-mentioned storage medium is used to store program instructions that perform the following functions, and realize the following functions:

Determine the actual angle of attack of the wind turbine blade spanwise to the target position, where the target position is any position randomly selected; 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; relatively poor A comparison result is obtained between the value and the preset value, and the fault information of the fan blade is determined according to the comparison result, wherein the fault information includes: the position of the fault of the fan blade and the cause of the fault.

Specifically, the above-mentioned processor is used to call the program instructions in the memory to realize the following functions:

Determine the actual angle of attack of the wind turbine blade spanwise to the target position, where the target position is any position randomly selected; 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; relatively poor A comparison result is obtained between the value and the preset value, and the fault information of the fan blade is determined according to the comparison result, wherein the fault information includes: the position of the fault of the fan blade and the cause of the fault.

In the relevant embodiments of the present application, the method of comparing the actual angle of attack with the target angle of attack is adopted to obtain the rotational speed, active power and apparent power of the wind turbine; when the rotational speed is less than the rated rotational speed, the active power is greater than zero and the apparent power In the case of less than the rated apparent power, determine the actual angle of attack of the wind turbine blade spanwise the target position, where the target position is any position randomly selected; obtain the target angle of attack corresponding to the target position, and determine the actual angle of attack and the target position. The difference value of the target angle of attack; compare the difference value and the preset value to obtain the comparison result, which achieves the purpose of determining the fault information of the fan blade according to the comparison result, thus realizing the rapid location of the fault, and giving the cause of the fault, saving energy A large number of calculation processes simplifies the data processing process and saves the technical effect of labor costs, thereby solving the problem of inaccurate test results and inability to locate the specific fault location due to the method of comparing the power curve in the related art to determine the fault state of the wind turbine. , it is impossible to give a clear cause of the failure, and the test process is complicated and the labor cost is high.

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

In the above-mentioned 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, reference may be made to related descriptions of other embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are only illustrative, for example, the division of the units may be a logical function division, and there may be other division methods in actual implementation, for example, multiple units or components may be combined or Integration into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of units or modules, and may be in electrical or other forms.

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

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 alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The integrated unit, if implemented in the form of a software functional unit and sold or used as an independent product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, and the computer software products are stored in a storage medium , including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments 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, magnetic disk or optical disk and other media that can store program codes .

The above are only the preferred embodiments of the present application. It should be pointed out that for those skilled in the art, without departing from the principles of the present application, several improvements and modifications can also be made. It should be regarded as the protection scope of this application.

Claims (13)

1. A method for determining fault information of a wind turbine, comprising: determining the actual angle of attack of the fan blades of the wind turbine in the spanwise target position, wherein the target position is any position randomly selected; 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 comparison result is obtained by comparing the difference value with a preset value, and fault information of the fan blade is determined according to the comparison result, wherein the fault information includes: the fault location of the fan blade and the cause of the fault. 2 . The method according to claim 1 , wherein determining the actual angle of attack of the fan blade spanwise target position of the wind turbine, comprising: 2 . obtaining the installation angle of the fan blade, wherein the installation angle is the angle between the chord length of the fan blade and the rotation plane; obtaining the inflow angle of the wind 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, wherein obtaining the installation angle of the fan blade comprises: Get the design pattern of the wind turbine; The design pattern is analyzed, and the twist angle corresponding to the fan blade when the fan blade in the design pattern is the first pitch angle is obtained; obtaining the second pitch angle corresponding to the fan blade at the target position; The installation angle is obtained according to the second pitch angle and the torsion angle. 4. The method according to claim 3, wherein obtaining the installation angle according to the second pitch angle and the torsion angle, comprising: Perform a summation operation on the second pitch angle and the twist angle to obtain a summation result; The summation result is determined as the installation angle. 5. The method according to claim 2, wherein obtaining the inflow angle of the wind blade comprises: Detecting the vector wind speed at the target area of the fan blade, wherein the vector wind speed includes: wind speed and wind direction; Obtain 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, wherein before detecting the vector wind speed at the target area of the fan blade, the method further comprises: Detecting the incoming air blowing to the fan blade, and determining the incoming air direction of the incoming air; Determine the area indicated by the intake wind direction as the target area. 7. The method according to claim 1, wherein the preset value comprises: a first preset value and a second preset value, after comparing the difference between the difference value and the preset value before obtaining the comparison result, the method further includes: dividing the fan blade along the span direction of the fan blade to obtain a multi-segment fan blade; For multi-segment sub-fan blades, each sub-fan blade is configured with the first preset value and the second preset value, wherein the first preset value is less than zero, and the second preset value is Greater than zero, the absolute values corresponding to the first preset value and the second preset value have no magnitude relationship, and the absolute values corresponding to the first preset value and the second preset value are the same as The target distance has a negative correlation, 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 , wherein a comparison result is obtained by comparing the difference value and a preset value, and the fault information of the fan blade is determined according to the comparison result, comprising: 8 . determining the difference values corresponding to the fan blades in each segment; comparing the magnitude of the difference with the first preset value in the fan blades of each segment; Determining the target sub-fan blade whose difference value is smaller than the first preset value in the sub-fan blades of each segment, and determining the fault position of the fan blade as the position corresponding to the target sub-fan blade in the fan blade, It is determined that the cause of the failure is that the angle of attack is too small. 9. The method according to claim 7, characterized in that, comparing the difference value with a preset value to obtain a comparison result, and determining the fault information of the fan blade according to the comparison result, comprising: determining the difference values corresponding to the fan blades in each segment; comparing the magnitude of the difference with the second preset value in the fan blades of each segment; determining the target sub-fan blade whose difference value is greater than the second preset value among the sub-fan blades of each segment, and determining that the fault position of the fan blade is the position corresponding to the target sub-fan blade in the fan blade, It is determined that the cause of the failure is that the angle of attack is too large. 10. The method according to any one of claims 7 to 9, wherein the method further comprises: When it is determined that the difference in the sub-fan blades of each section is greater than or equal to a first preset value; and the difference in the sub-fan blades of each section is less than or equal to a second preset value, determine the blade The fan has not failed. 11. A device for determining fault information of a wind turbine, comprising: a first determination module, configured to determine the actual angle of attack of the wind turbine blade spanwise target position, wherein the target position is any position randomly selected; an acquisition module, configured to acquire 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, configured to compare the difference value with a preset value to obtain a comparison result, and determine fault information of the fan blade according to the comparison result, wherein the fault information includes: The location of the fault and the cause of the fault. 12. A non-volatile storage medium, wherein the non-volatile storage medium comprises a stored program, wherein when the program is executed, a device where the non-volatile storage medium is located is controlled to execute the claims A method for determining fault information of a wind turbine according to any one of 1 to 10. 13 . A processor, wherein the processor is configured to run a program, wherein when the program runs, the method for determining the fault information of the wind turbine according to any one of claims 1 to 10 is executed.

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