A method and device for calculating load of wind turbine generator set

Abstract

The present invention discloses a method and device for calculating the load of a wind turbine, wherein the method includes the following steps: obtaining turbulence intensity data at different wind speeds for each machine point of the wind turbine, extracting the envelope turbulence intensity corresponding to different wind speeds; fitting the turbulence intensity data within the preset wind speed interval according to the envelope turbulence intensity of the preset wind speed interval to obtain the fitted turbulence intensity; calculating the load value of the wind turbine according to the fitted turbulence intensity, and determining whether the load value is within a normal range in combination with the design load of the wind turbine. By obtaining the turbulence intensity data at different wind speeds for each machine point of the wind turbine, extracting the envelope turbulence intensity, and then fitting the data and calculating the load value of the wind turbine, the traditional calculation method is replaced to perform safety review on each machine point of the wind farm, and the maximum reviewed turbulence intensity is divided using a reasonable wind speed interval, thereby carrying out load calculation and making the load more reasonable.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power control, and in particular to a method and device for calculating the load of a wind turbine generator set. Background Art

[0002] When conducting a safety review of large wind turbines, it is necessary to use wind farm wind resource data to carry out load calculations. The formation of wind resources is the result of the combined effects of a variety of complex natural factors, and the assessment of the turbulence intensity of wind resources directly affects the size of the ultimate load and fatigue load of wind turbines. Therefore, the analysis and evaluation of wind resource conditions is particularly important. Based on current technology, after the wind measurement data is output from the wind resource assessment software, various factors such as the turbulence intensity of wind farm wind resources, annual average wind speed, and air density are directly combined with IEC / GL specifications to carry out load calculations. Often, due to factors such as the low-probability wind speed in individual sectors in the software being too high, overly conservative calculations, and abnormal turbulence data, the load calculation results are too large or even unreasonable, affecting the judgment of the safety of the wind farm.

[0003] The current safety review method is overly dependent on the wind resource turbulence data output by the software. In the wind resource report based on the software output, the wind measurement data is mostly for half a year or more, and the probability of strong winds is low, especially in some sectors where the turbulence data from high wind speeds onwards tends to be uniform. This is because the wind frequency at high wind speeds is low, and its turbulence data is often not available in the short term. When the turbulence data at the wind speed cannot be obtained within the measurement period of the wind radar, the software automatically defaults to the turbulence intensity at the wind speed being consistent with the previous wind speed. Combined with the wind frequency and turbulence intensity of each sector, the effective turbulence intensity value finally obtained has some unreasonable data. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a method and device for calculating the load of a wind turbine set. By acquiring the turbulence intensity data at different wind speeds at each machine point of the wind turbine set, the envelope turbulence intensity is extracted, and then the data is fitted and the load value of the wind turbine set is calculated. The traditional calculation method is replaced by performing a safety review on each machine point of the wind farm, and the maximum reviewed turbulence intensity is divided using a reasonable wind speed range, so as to carry out load calculation, make the load more reasonable, and will not produce sudden changes or abnormal loads at a certain wind speed.

[0005] In order to solve the above technical problems, a first aspect of an embodiment of the present invention provides a method for calculating a load of a wind turbine generator set, comprising the following steps:

[0006] Acquire turbulence intensity data at different wind speeds at each wind turbine generator set site, and extract envelope turbulence intensities corresponding to the different wind speeds;

[0007] According to the envelope turbulence intensity in the preset wind speed interval, fitting the turbulence intensity data in the preset wind speed interval to obtain a fitted turbulence intensity;

[0008] The load value of the wind turbine generator set is calculated according to the fitted turbulence intensity, and it is determined whether the load value is within a normal range in combination with the design load of the wind turbine generator set.

[0009] Furthermore, fitting the turbulence intensity data in the preset wind speed interval according to the envelope turbulence intensity in the preset wind speed interval to obtain the fitted turbulence intensity includes:

[0010] Obtaining the envelope turbulence intensity of a first preset wind speed interval, fitting the turbulence intensity data of the first preset wind speed interval, and obtaining a first fitting turbulence intensity for verifying the fatigue load of the wind turbine and its tower; and / or

[0011] Obtaining the envelope turbulence intensity of a second preset wind speed interval, fitting the turbulence intensity data of the second preset wind speed interval, and obtaining a second fitting turbulence intensity for verifying the wind turbine and its blade limit load; and / or

[0012] The envelope turbulence intensity of a third preset wind speed interval is obtained, and the turbulence intensity data of the third preset wind speed interval is fitted to obtain a third fitted turbulence intensity for verifying the fatigue load of the blade.

[0013] Further, the first preset wind speed interval is Vave-2Vave;

[0014] The second preset wind speed interval is Vrate-Vout;

[0015] The third preset wind speed interval is Vave-2Vave;

[0016] Among them, Vave is the annual average wind speed, Vrate is the rated wind speed of the wind turbine, and Vout is the cut-out wind speed of the wind turbine.

[0017] Furthermore, after fitting the turbulence intensity data within the preset wind speed range, the method further includes:

[0018] Remove the turbulence intensity corresponding to the points where the fitting curve is too high or too low.

[0019] Furthermore, after extracting the envelope turbulence intensities corresponding to the different wind speeds, the method further includes:

[0020] In combination with the sector turbulence intensity of the wind turbine generator set, it is determined whether the envelope turbulence intensity is within a normal value range.

[0021] Accordingly, a first aspect of an embodiment of the present invention provides a wind turbine load calculation device, comprising:

[0022] A data acquisition module, which is used to obtain turbulence intensity data at different wind speeds at each site of the wind turbine generator set, and extract the envelope turbulence intensity corresponding to the different wind speeds;

[0023] A data fitting module, which is used to fit the turbulence intensity data within the preset wind speed interval according to the envelope turbulence intensity in the preset wind speed interval to obtain a fitted turbulence intensity;

[0024] A data judgment module is used to calculate the load value of the wind turbine generator set according to the fitted turbulence intensity, and determine whether the load value is within a normal range in combination with the design load of the wind turbine generator set.

[0025] Furthermore, the data fitting module includes:

[0026] a first data fitting unit, which is used to obtain the envelope turbulence intensity in a first preset wind speed interval, fit the turbulence intensity data in the first preset wind speed interval, and obtain a first fitting turbulence intensity for verifying the fatigue load of the wind turbine and its tower; and / or

[0027] a second data fitting unit, which is used to obtain the envelope turbulence intensity in a second preset wind speed interval, and fit the turbulence intensity data in the second preset wind speed interval to obtain a second fitting turbulence intensity for verifying the wind turbine and its blade limit load; and / or

[0028] The third data fitting unit is used to obtain the envelope turbulence intensity in a third preset wind speed interval, fit the turbulence intensity data in the third preset wind speed interval, and obtain a third fitting turbulence intensity for verifying the fatigue load of the blade.

[0029] Furthermore, the first preset wind speed interval is Vave-2Vave;

[0030] The second preset wind speed interval is Vrate-Vout;

[0031] The third preset wind speed interval is Vave-2Vave;

[0032] Among them, Vave is the annual average wind speed, Vrate is the rated wind speed of the wind turbine, and Vout is the cut-out wind speed of the wind turbine.

[0033] Furthermore, the data fitting module also includes:

[0034] The data processing unit is used to remove the turbulence intensity corresponding to the points of the fitting curve that are too high or too low.

[0035] Furthermore, the data acquisition module also includes:

[0036] A data judgment unit is used to judge whether the envelope turbulence intensity is within a normal value range in combination with the sector turbulence intensity of the wind turbine generator set.

[0037] Correspondingly, the third aspect of an embodiment of the present invention also provides an electronic device, comprising: at least one processor; and a memory connected to the at least one processor; wherein the memory stores instructions that can be executed by a processor, and the instructions are executed by a processor so that the at least one processor executes the above-mentioned wind turbine load calculation method.

[0038] In addition, a fourth aspect of an embodiment of the present invention further provides a computer-readable storage medium on which computer instructions are stored, and when the instructions are executed by a processor, the above-mentioned wind turbine load calculation method is implemented.

[0039] The above technical solution of the embodiment of the present invention has the following beneficial technical effects:

[0040] By obtaining the turbulence intensity data of each wind turbine site at different wind speeds, extracting the envelope turbulence intensity, and then performing data fitting and calculating the load value of the wind turbine, the traditional calculation method is replaced by conducting a safety review of each wind turbine site. The maximum reviewed turbulence intensity is divided into reasonable wind speed ranges to carry out load calculation, making the load more reasonable and avoiding sudden changes or abnormal loads at a certain wind speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a flow chart of a method for calculating a wind turbine load provided by an embodiment of the present invention;

[0042] Figure 2 is a logic diagram of a method for calculating a wind turbine load provided by an embodiment of the present invention;

[0043] Figure 3 is a schematic diagram of turbulence intensity (m=4) fitting provided by an embodiment of the present invention;

[0044] Figure 4 is a schematic diagram of turbulence intensity (m=1) fitting provided by an embodiment of the present invention;

[0045] Figure 5 is a schematic diagram of turbulence intensity (m=10) fitting provided in an embodiment of the present invention;

[0046] Figure 6 It is a module block diagram of a wind turbine load calculation device provided by an embodiment of the present invention;

[0047] Figure 7is a block diagram of a data fitting module provided by an embodiment of the present invention;

[0048] Figure 8 It is a block diagram of a data judgment module provided by an embodiment of the present invention.

[0049] Reference numerals:

[0050] 1. Data acquisition module, 2. Data fitting module, 21. First data fitting unit, 22. Second data fitting unit, 23. Third data fitting unit, 24. Data processing unit, 3. Data judgment module, 31. Data judgment unit. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0052] With the development of technology and the increase in power, the blades used in large wind turbines are getting longer and longer, which makes the load of the unit more and more sensitive to the aerodynamic performance of the turbulence intensity of wind resources. The high wind speed turbulence intensity of wind turbine generators has a greater impact on the ultimate load of the unit and components, and the turbulence intensity near the rated wind speed has a greater impact on the fatigue load of the unit and components.

[0053] At present, the specific process for conducting safety review of large wind turbines is as follows: according to the external conditions of wind resources output by the software, the turbulence intensity values ​​at three different wind speeds of m=1, m=4, and m=10 are obtained; the maximum turbulence intensity at each wind speed of each machine site in the m=1 category is used in combination with IEC / GL specifications to calculate the ultimate load of wind turbine units and components; the maximum turbulence intensity at each wind speed of each machine site in the m=4 category is used in combination with IEC / GL specifications to calculate the fatigue load of wind turbine units; the maximum turbulence intensity at each wind speed of each machine site in the m=10 category is used in combination with IEC / GL specifications to calculate the fatigue load of wind turbine blades; if the load calculation result is within the deviation range of 5% of the design load of the wind turbine, then the wind farm has no safety hazards; if the load calculation result exceeds the design load of the wind turbine and the deviation is more than 5%, the wind farm has a large safety hazard, and protective measures need to be taken during the operation of the unit or the wind turbine unit should not be deployed at the machine site.

[0054] Please refer to Figure 1 and Figure 2 A first aspect of an embodiment of the present invention provides a method for calculating a load of a wind turbine generator system, comprising the following steps:

[0055] S100, obtaining turbulence intensity data at different wind speeds at each site of the wind turbine generator set, and extracting envelope turbulence intensities corresponding to different wind speeds.

[0056] S200, fitting turbulence intensity data within a preset wind speed interval according to the envelope turbulence intensity of the preset wind speed interval to obtain a fitted turbulence intensity.

[0057] S300: Calculate the load value of the wind turbine generator set according to the fitted turbulence intensity, and determine whether the load value is within a normal range in combination with the design load of the wind turbine generator set.

[0058] Specifically, in step S200, the turbulence intensity data in the preset wind speed interval is fitted according to the envelope turbulence intensity in the preset wind speed interval to obtain the fitted turbulence intensity, including:

[0059] S210, obtaining the envelope turbulence intensity of a first preset wind speed interval, fitting the turbulence intensity data of the first preset wind speed interval, and obtaining a first fitting turbulence intensity for verifying the fatigue load of the wind turbine generator set and its tower.

[0060] Specifically, when verifying the fatigue loads of the unit and the tower, the turbulence data of each unit point when m=4 is used to extract the envelope turbulence intensity when m=4.

[0061] Combined with the sector turbulence intensity, the rationality of the envelope turbulence intensity is judged. From the definition of wind resource turbulence intensity, it can be seen that turbulence intensity is the ratio of the mean square error σ of the difference between the instantaneous wind speed and the average wind speed to the average wind speed v. The frequency of medium and high wind speeds in the wind measurement period is low, which may cause the software to output some valid turbulence data abnormally, resulting in too high or too low turbulence intensity, affecting the selection of envelope turbulence intensity.

[0062] According to the Weibull wind frequency distribution and equivalent fatigue load calculation, it can be known that in the range of Vave (annual average wind speed) and 2Vave wind speed, the wind frequency accounts for the highest proportion and has a great influence on the fatigue load. Therefore, the turbulence data in this range is mainly used, and the envelope turbulence intensity between the annual average wind speed Vave and 2Vave is taken using the formula σ=I(0.75Vhub+b) to fit the turbulence data in this wind speed range, and the points that are too high or too low on the fitting curve are removed.

[0063] Substitute the fitted turbulence intensity, calculate the fatigue load of the unit and tower according to the IEC / GL specifications, and compare with the design load to determine whether there are any safety hazards in the wind farm.

[0064] and / or

[0065] S220, obtaining the envelope turbulence intensity of a second preset wind speed interval, fitting the turbulence intensity data of the second preset wind speed interval, and obtaining a second fitting turbulence intensity for verifying the limit load of the wind turbine and its blades.

[0066] Specifically, when verifying the ultimate loads of the unit and blades, the turbulence data of each unit point when m=1 is used to extract the envelope turbulence intensity when m=1.

[0067] Combined with the sector turbulence intensity, the rationality of the envelope turbulence intensity is judged. From the definition of wind resource turbulence intensity, it can be seen that turbulence intensity is the ratio of the mean square error σ of the difference between the instantaneous wind speed and the average wind speed to the average wind speed v. The frequency of medium and high wind speeds in the wind measurement period is low, which may cause the software to output some valid turbulence data abnormally, resulting in too high or too low turbulence intensity, affecting the selection of envelope turbulence intensity.

[0068] In the wind speed range of Vrate (rated wind speed of the fan) and Vout (cut-out wind speed of the fan), extreme loads are prone to occur. Therefore, the turbulence intensity data in the wind speed range of Vrate and Vout are selected, and the envelope turbulence intensity between Vrate and Vout is taken using the formula σ=I(0.75Vhub+b) to fit the turbulence data in the wind speed range, and the points that are too high or too low on the fitting curve are removed.

[0069] Substitute the fitted turbulence intensity, calculate the ultimate loads of the unit and blades according to IEC / GL specifications, and compare them with the design loads to determine whether there are any safety hazards in the wind farm.

[0070] and / or

[0071] S230, obtaining the envelope turbulence intensity of a third preset wind speed interval, fitting the turbulence intensity data of the third preset wind speed interval, and obtaining a third fitting turbulence intensity for verifying the fatigue load of the blade.

[0072] Specifically, when verifying the fatigue load of the blade, the turbulence data of each machine point when m=10 is used to extract the envelope turbulence intensity when m=10.

[0073] Combined with the sector turbulence intensity, the rationality of the envelope turbulence intensity is judged. From the definition of wind resource turbulence intensity, it can be seen that turbulence intensity is the ratio of the mean square error σ of the difference between the instantaneous wind speed and the average wind speed to the average wind speed v. The frequency of medium and high wind speeds in the wind measurement period is low, which may cause the software to output some valid turbulence data abnormally, resulting in too high or too low turbulence intensity, affecting the selection of envelope turbulence intensity.

[0074] According to the Weibull wind frequency distribution and equivalent fatigue load calculation, it can be known that in the range of Vave (annual average wind speed) and 2Vave wind speed, the wind frequency accounts for the highest proportion and has a great influence on the fatigue load. Therefore, the turbulence data in this range is mainly used, and the envelope turbulence intensity between the annual average wind speed Vave and 2Vave is taken using the formula σ=I(0.75Vhub+b) to fit the turbulence data in this wind speed range, and the points that are too high or too low on the fitting curve are removed.

[0075] Substitute the fitted turbulence intensity, calculate the blade fatigue load according to the IEC / GL specification, and compare it with the design load to determine whether there are any safety hazards in the wind farm.

[0076] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention is further described in detail below in combination with the flow chart and the safety review of the wind resource data and model configuration of a certain wind farm. The wind farm unit model is 2.2MW / 131 unit, with a total of seven machine sites, a tower height of 80m, a cut-in wind speed of 3m / s, a cut-out wind speed of 20m / s, an annual average wind speed of 7m / s, and a rated wind speed of 9m / s. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention.

[0077] Step 1: According to the turbulence intensity values ​​at different wind speeds at each machine point output by the software, extract the maximum turbulence intensity at the wind speed, that is, the envelope turbulence intensity.

[0078] Step 2: When verifying the fatigue loads of the unit and tower, the turbulence data of each unit point when m = 4 is used to extract the envelope turbulence intensity when m = 4.

[0079] Table 1: Turbulence intensity at each machine point when M = 4

[0080]

[0081]

[0082] Step 3: Combined with the sector turbulence intensity, judge the rationality of the envelope turbulence intensity. From the definition of wind resource turbulence intensity, it can be seen that turbulence intensity is the ratio of the mean square error σ of the difference between the instantaneous wind speed and the average wind speed to the average wind speed v. The frequency of medium and high wind speeds in the wind measurement period is low, which may cause the software to output some valid turbulence data abnormally, resulting in too high or too low turbulence intensity, affecting the selection of envelope turbulence intensity.

[0083] Step 4: According to the Weibull wind frequency distribution and equivalent fatigue load calculation, it can be known that in the wind speed range of 7m / s (annual average wind speed) and 14m / s, the wind frequency accounts for the highest proportion and has a great impact on the fatigue load. Therefore, the turbulence data in this range is mainly used, and the envelope turbulence intensity between the annual average wind speed of 7m / s and 14m / s is taken using the formula σ=I(0.75Vhub+b) to fit the turbulence data in this wind speed range, and remove the points that are too high or too low on the fitting curve. Figure 3 As shown, the turbulence intensity at low wind speed and cut-out wind speed, which has little effect on fatigue load, can be removed, and the turbulence intensity in the fitting wind speed range of 7-14 m / s is selected as the calculated value.

[0084] Step 5: Substitute the fitted turbulence intensity to calculate the fatigue load of the unit and tower according to the IEC / GL specification, and compare it with the design load to determine whether there are any safety hazards in the wind farm.

[0085] Step 6: When verifying the ultimate loads of the unit and blades, the turbulence data of each unit point when m=1 is used to extract the envelope turbulence intensity when m=1.

[0086] Table 2: Turbulence intensity of the group when m=1

[0087]

[0088]

[0089] Step 7: Repeat step 3. Figure 4 As shown in the figure, extreme loads are prone to occur in the wind speed range of Vrate (rated wind speed of the fan) and Vout (cut-out wind speed of the fan), so the turbulence intensity data in the wind speed range of Vrate and Vout are selected, and the envelope turbulence intensity between Vrate and Vout is taken using the formula σ=I(0.75Vhub+b) to fit the turbulence data in the wind speed range, and the points that are too high or too low on the fitting curve are removed.

[0090] Step 8: Substitute the fitted turbulence intensity to calculate the ultimate loads of the unit and blades according to IEC / GL specifications, and compare with the design load to determine whether there are any safety hazards in the wind farm.

[0091] Step 9: When verifying the fatigue load of the blade, the turbulence data of each machine point when m=10 is used to extract the envelope turbulence intensity when m=10.

[0092] Table 3 Turbulence intensity of the unit when m=10

[0093]

[0094]

[0095] Step 10: Figure 5 As shown, repeat steps 3, 4, and 5 to complete the safety review of the wind farm units, towers, and blades.

[0096] Accordingly, please refer to Figure 6 A first aspect of an embodiment of the present invention provides a wind turbine load calculation device, comprising: a data acquisition module 1, a data fitting module 2 and a data judgment module 3.

[0097] Among them, the data acquisition module 1 is used to obtain the turbulence intensity data of each wind turbine station under different wind speeds, and extract the envelope turbulence intensity corresponding to different wind speeds; the data fitting module 2 is used to fit the turbulence intensity data within the preset wind speed range according to the envelope turbulence intensity of the preset wind speed range, and obtain the fitted turbulence intensity; the data judgment module 3 is used to calculate the load value of the wind turbine based on the fitted turbulence intensity, and determine whether the load value is within the normal range in combination with the design load of the wind turbine.

[0098] For further information, please refer to Figure 7 The data fitting module 2 includes: a first data fitting unit 21, a second data fitting unit 22 and / or a third data fitting unit 23.

[0099] Among them, the first data fitting unit 21 is used to obtain the envelope turbulence intensity of the first preset wind speed interval, fit the turbulence intensity data of the first preset wind speed interval, and obtain the first fitting turbulence intensity for verifying the fatigue load of the wind turbine and its tower. The second data fitting unit 22 is used to obtain the envelope turbulence intensity of the second preset wind speed interval, fit the turbulence intensity data of the second preset wind speed interval, and obtain the second fitting turbulence intensity for verifying the limit load of the wind turbine and its blades. The third data fitting unit 23 is used to obtain the envelope turbulence intensity of the third preset wind speed interval, fit the turbulence intensity data of the third preset wind speed interval, and obtain the third fitting turbulence intensity for verifying the fatigue load of the blade.

[0100] Furthermore, the first preset wind speed interval is Vave-2Vave, the second preset wind speed interval is Vrate-Vout, and the third preset wind speed interval is Vave-2Vave, wherein Vave is the annual average wind speed, Vrate is the rated wind speed of the wind turbine, and Vout is the cut-out wind speed of the wind turbine.

[0101] Furthermore, the data fitting module 2 further comprises: a data processing unit 24. The data processing unit 24 is used to remove the turbulence intensity corresponding to the points of the fitting curve that are too high or too low.

[0102] For further information, please refer to Figure 8 The data acquisition module 3 further includes: a data judgment unit 31. The data judgment unit 31 is used to judge whether the envelope turbulence intensity is within a normal value range in combination with the sector turbulence intensity of the wind turbine.

[0103] Correspondingly, the third aspect of an embodiment of the present invention also provides an electronic device, comprising: at least one processor; and a memory connected to the at least one processor; wherein the memory stores instructions that can be executed by a processor, and the instructions are executed by a processor so that the at least one processor executes the above-mentioned wind turbine load calculation method.

[0104] In addition, a fourth aspect of an embodiment of the present invention further provides a computer-readable storage medium on which computer instructions are stored, and when the instructions are executed by a processor, the above-mentioned wind turbine load calculation method is implemented.

[0105] The embodiment of the present invention aims to protect a method and device for calculating the load of a wind turbine, wherein the method includes the following steps: obtaining turbulence intensity data at different wind speeds at each machine point of the wind turbine, extracting the envelope turbulence intensity corresponding to different wind speeds; fitting the turbulence intensity data within the preset wind speed interval according to the envelope turbulence intensity of the preset wind speed interval to obtain the fitted turbulence intensity; calculating the load value of the wind turbine according to the fitted turbulence intensity, and determining whether the load value is within the normal range in combination with the design load of the wind turbine. The above technical solution has the following effects:

[0106] By obtaining the turbulence intensity data of each wind turbine site at different wind speeds, extracting the envelope turbulence intensity, and then performing data fitting and calculating the load value of the wind turbine, the traditional calculation method is replaced by conducting a safety review of each wind turbine site. The maximum reviewed turbulence intensity is divided into reasonable wind speed ranges to carry out load calculation, making the load more reasonable and avoiding sudden changes or abnormal loads at a certain wind speed.

[0107] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0108] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0109] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0110] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for calculating the load of a wind turbine generator set. It is characterized in that The steps include: Acquire turbulence intensity data at different wind speeds at each wind turbine generator set site, and extract envelope turbulence intensities corresponding to the different wind speeds; According to the envelope turbulence intensity in the preset wind speed interval, fitting the turbulence intensity data in the preset wind speed interval to obtain a fitted turbulence intensity; Calculating the load value of the wind turbine generator set according to the fitted turbulence intensity, and determining whether the load value is within a normal range in combination with the design load of the wind turbine generator set; The step of fitting the turbulence intensity data in the preset wind speed interval according to the envelope turbulence intensity in the preset wind speed interval to obtain the fitted turbulence intensity includes: Obtaining the envelope turbulence intensity of a first preset wind speed interval, fitting the turbulence intensity data of the first preset wind speed interval, and obtaining a first fitting turbulence intensity for verifying the fatigue load of the wind turbine and its tower; and / or Obtaining the envelope turbulence intensity of a second preset wind speed interval, fitting the turbulence intensity data of the second preset wind speed interval, and obtaining a second fitting turbulence intensity for verifying the wind turbine and its blade limit load; and / or Acquiring the envelope turbulence intensity in a third preset wind speed interval, fitting the turbulence intensity data in the third preset wind speed interval, and obtaining a third fitting turbulence intensity for verifying the fatigue load of the blade; The first preset wind speed interval is Vave-2Vave; The second preset wind speed interval is Vrate-Vout; The third preset wind speed interval is Vave-2Vave; Among them, Vave is the annual average wind speed, Vrate is the rated wind speed of the wind turbine, and Vout is the cut-out wind speed of the wind turbine.

2. The method for calculating the load of a wind turbine generator set according to claim 1, It is characterized in that After fitting the turbulence intensity data within the preset wind speed range, the method further includes: Remove the turbulence intensity corresponding to the points where the fitting curve is too high or too low.

3. The method for calculating the load of a wind turbine generator set according to claim 1 or 2, It is characterized in that After extracting the envelope turbulence intensities corresponding to the different wind speeds, the method further includes: In combination with the sector turbulence intensity of the wind turbine generator set, it is determined whether the envelope turbulence intensity is within a normal value range.

4. A wind turbine load calculation device, It is characterized in that include: A data acquisition module, which is used to obtain turbulence intensity data at different wind speeds at each site of the wind turbine generator set, and extract the envelope turbulence intensity corresponding to the different wind speeds; A data fitting module, which is used to fit the turbulence intensity data within the preset wind speed interval according to the envelope turbulence intensity in the preset wind speed interval to obtain a fitted turbulence intensity; A data judgment module, which is used to calculate the load value of the wind turbine generator set according to the fitted turbulence intensity, and determine whether the load value is within a normal range in combination with the design load of the wind turbine generator set; The data fitting module comprises: a first data fitting unit, which is used to obtain the envelope turbulence intensity in a first preset wind speed interval, fit the turbulence intensity data in the first preset wind speed interval, and obtain a first fitting turbulence intensity for verifying the fatigue load of the wind turbine and its tower; and / or a second data fitting unit, which is used to obtain the envelope turbulence intensity in a second preset wind speed interval, and fit the turbulence intensity data in the second preset wind speed interval to obtain a second fitting turbulence intensity for verifying the wind turbine and its blade limit load; and / or a third data fitting unit, which is used to obtain the envelope turbulence intensity in a third preset wind speed interval, and fit the turbulence intensity data in the third preset wind speed interval to obtain a third fitting turbulence intensity for verifying the fatigue load of the blade; The first preset wind speed interval is Vave-2Vave; The second preset wind speed interval is Vrate-Vout; The third preset wind speed interval is Vave-2Vave; Among them, Vave is the annual average wind speed, Vrate is the rated wind speed of the wind turbine, and Vout is the cut-out wind speed of the wind turbine.

5. The wind turbine load calculation device according to claim 4, It is characterized in that The data fitting module also includes: The data processing unit is used to remove the turbulence intensity corresponding to the points of the fitting curve that are too high or too low.

6. The wind turbine load calculation device according to claim 4 or 5, It is characterized in that The data acquisition module also includes: A data judgment unit is used to judge whether the envelope turbulence intensity is within a normal value range in combination with the sector turbulence intensity of the wind turbine generator set.

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