Generating capacity evaluation method and generating capacity evaluation device of wind generating set

Abstract

The invention provides a generating capacity evaluation method and a generating capacity evaluation device of a wind generating set. The generating capacity evaluation method comprises the following steps: acquiring a flow field simulation result of each sector of a wind power plant to which the wind generating set belongs; extracting simulation wind parameters of a plurality of grid points of an impeller surface of the wind generating set from a flow field simulation result; synthesizing an equivalent wind speed by using a first wind speed obtained based on the simulation wind parameter and the area of each grid point in the plurality of grid points; and evaluating the generating capacity of the wind generating set according to the equivalent wind speed and a predetermined power curve.

Description

Technical Field

[0001] The present disclosure relates to the field of wind power, and more specifically, to a method and a device for evaluating the power generation of a wind turbine generator set. Background Art

[0002] In the development and construction of a wind farm throughout its life cycle, the accurate evaluation of the arrangement of wind turbines (referred to as wind turbines or units) and power generation is a necessary prerequisite for ensuring the profitability of the wind farm.

[0003] In the micro-site selection stage, the location of the unit under complex terrain is affected by the constraints of ecological red lines, forests, farmlands, county boundaries, etc., resulting in the appearance of unit sites on high slope terrain during wind farm construction. Through simulation analysis, it is found that high slope terrain will cause uneven wind speed distribution on the impeller surface of the unit, and the method of evaluating power generation based on hub center wind speed has a great deviation, resulting in inaccurate evaluation of wind farm power generation, which leads to deviations in economic evaluation and rate of return calculation of wind farms, which has a significant impact on the development decision of wind farms.

[0004] In addition, with the continuous increase in the impeller diameter and unit power of wind turbines, the reliability of wind resource assessment schemes based on wind speed at hub height has gradually decreased, making it difficult to meet the needs of wind farm design planning and fault analysis. Summary of the invention

[0005] One of the objectives of the present disclosure is to provide an evaluation method capable of accurately evaluating the power generation of a wind turbine generator set.

[0006] According to a first aspect of the present disclosure, a method for evaluating power generation of a wind turbine is provided, the method comprising: obtaining flow field simulation results of each sector of a wind farm to which the wind turbine belongs; extracting simulated wind parameters of a plurality of grid areas of an impeller surface of the wind turbine based on division of a plurality of grid points from the flow field simulation results; synthesizing an equivalent wind speed using a first wind speed obtained based on the simulated wind parameters and the area of ​​each grid area; and evaluating the power generation of the wind turbine according to the equivalent wind speed and a predetermined power curve.

[0007] According to an embodiment of the present disclosure, the step of synthesizing an equivalent wind speed using the first wind speed obtained based on the simulated wind parameters and the area of ​​each grid area may include: obtaining the area ratio of each grid area based on the ratio of the area occupied by each grid area to the total area of ​​the impeller surface; and calculating the equivalent wind speed based on the first wind speed of each grid area and the corresponding area ratio.

[0008] According to an embodiment of the present disclosure, the equivalent wind speed may be the cube root of the sum of the products of the cube of the first wind speed of all grid areas and the corresponding area ratios.

[0009] According to an embodiment of the present disclosure, the first wind speed may be obtained by correcting the simulated wind speed in the simulated wind parameter.

[0010] According to an embodiment of the present disclosure, the step of obtaining a first wind speed by correcting the simulated wind speed in the simulated wind parameter may include: acquiring historical sidewind data of the wind turbine generator set; dividing the wind speed into multiple wind speed intervals and counting the average wind speeds in different wind speed intervals based on the historical sidewind data; for each grid area, calculating the first wind speed according to the product of the ratio of the simulated wind speed of the wind turbine generator set to the simulated wind speed at the wind tower position of the wind turbine generator set and the average wind speed.

[0011] According to an embodiment of the present disclosure, the power curve may be an equivalent power curve, and the equivalent power curve of the wind turbine generator set is obtained by inputting the first wind speed and wind direction data in the simulated wind parameter into the load simulation model.

[0012] According to an embodiment of the present disclosure, the step of evaluating the power generation of the wind turbine generator set according to the equivalent wind speed and a predetermined power curve may include: calculating the power generation of the wind turbine generator set according to the product of the equivalent power curve, the equivalent wind speed and the wind frequency.

[0013] According to a second aspect of the present disclosure, a device for evaluating power generation of a wind turbine generator set is provided, the device comprising: an acquisition module, for acquiring flow field simulation results of each sector of a wind farm to which the wind turbine generator set belongs and extracting simulated wind parameters of a plurality of grid areas of an impeller surface of the wind turbine generator set divided based on a plurality of grid points from the flow field simulation results; a calculation module, for synthesizing an equivalent wind speed using a first wind speed obtained based on the simulated wind parameters and the area of ​​each grid area; and an evaluation module, for evaluating the power generation of the wind turbine generator set based on the equivalent wind speed and a predetermined power curve.

[0014] According to a third aspect of the present disclosure, a computing device is provided, which may include: a processor; and a memory connected to the processor; wherein the memory stores a program or instruction, and when the program or instruction is executed by the processor, the processor is prompted to execute the above-mentioned power generation assessment method of the wind turbine generator set.

[0015] According to a fourth aspect of the present disclosure, a computer-readable storage medium is provided, which stores a program or instruction. When the program or instruction is executed by a processor, the processor is prompted to execute the above-mentioned power generation assessment method of a wind turbine generator set.

[0016] According to the power generation evaluation method of the embodiment of the present disclosure, the equivalent wind speed of the impeller surface replaces the hub center wind speed, matches the power curve calculated based on the impeller surface wind speed, and is used to evaluate the power generation of the wind turbine generator set.

[0017] The power generation assessment method according to the embodiment of the present disclosure fully considers the power generation assessment deviation caused by the uneven distribution of wind speed on the impeller surface, and can ensure the accuracy and reliability of the overall economic evaluation of the wind farm. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a modeling diagram of a high slope terrain where a wind turbine generator set is located according to the first embodiment of the present disclosure;

[0019] Figure 2 is a schematic diagram of a grid point configuration of an impeller surface according to an embodiment of the present disclosure;

[0020] Figure 3 is a flow chart of a method for evaluating power generation of a wind turbine generator set according to an embodiment of the present disclosure;

[0021] Figure 4 is a flow chart showing a method of synthesizing equivalent wind speeds according to an embodiment of the present disclosure;

[0022] Figure 5 is a flow chart showing a calculation method of a first wind speed according to an embodiment of the present disclosure;

[0023] Figure 6 is a flow chart of a method for evaluating power generation of a wind turbine generator set according to a second embodiment of the present disclosure; and

[0024] Figure 7 4 is a block diagram of a wind turbine generator system according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0025] The following detailed description is provided to help gain a comprehensive understanding of the methods, devices and / or systems described herein. However, the order of operations described herein is only an example and is not limited to those orders set forth herein, but may be equivalently replaced or changed except for operations that must occur or be performed in a specific order. In addition, for greater clarity and simplicity, the description of content known in the art will be omitted or simplified.

[0026] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by a person of ordinary skill in the art to which the present disclosure belongs after understanding the present disclosure. Unless explicitly defined as such herein, terms (such as those defined in a general dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and the present disclosure, and should not be interpreted in an idealized or overly formal manner.

[0027] Unless otherwise specified, the same reference numerals generally refer to the same elements (e.g., components, steps, and methods). Reference numerals described in the previous embodiments may be omitted if they appear again in the subsequent embodiments. In addition, the technical features described in different or the same embodiments may be combined in any manner, as long as the combined embodiments or technical solutions are complete and can solve the technical problems of the present application or achieve the technical effects described or not described in the present disclosure but can be determined based on the above complete technical solutions. The embodiments of the present disclosure are described in detail below in conjunction with the accompanying drawings.

[0028] Figure 1 is a modeling diagram of a high slope terrain where a wind turbine generator set is located according to the first embodiment of the present disclosure, Figure 2 is a schematic diagram of a grid point configuration of an impeller surface according to an embodiment of the present disclosure, Figure 3 is a flow chart of a method for evaluating power generation of a wind turbine generator set according to an embodiment of the present disclosure, Figure 4 is a flow chart showing an equivalent wind speed synthesis method according to an embodiment of the present disclosure, Figure 5 is a flowchart showing a method of calculating a first wind speed according to an embodiment of the present disclosure.

[0029] Reference Figure 3 According to an embodiment of the present disclosure, the method for evaluating the power generation of a wind turbine generator set includes step S310, step S320, step S330 and step S340.

[0030] In step S310, the flow field simulation results of each sector of the wind farm to which the wind turbine generator set belongs are obtained.

[0031] The flow field simulation results of each sector of the wind farm to which the wind turbine generator set belongs can be obtained by simulation using simulation software (eg, computational fluid dynamics (CFD)).

[0032] When performing CFD flow field simulation on each sector of a wind farm, it is necessary to first establish a terrain map of the wind turbines and perform terrain modeling.

[0033] Taking high slope terrain as an example, the terrain modeling is as follows: Figure 1 It should be noted that although the terrain modeling is performed based on the terrain at the location of the wind turbine generator set as a high slope terrain, this is only an example, and the power generation evaluation method disclosed in the present invention can also be applied to wind turbine generator sets on platform terrains, etc. For example, it can be applied to three-blade, horizontal-axis, upwind wind turbine generator sets, and can also be applied to various known models such as two-blade wind turbines and dual-machine offshore wind turbines, and is particularly applicable to wind turbine generator sets with a rotor diameter exceeding 100 meters.

[0034] As an example, the wind farm topographic map of the wind turbine generator set, the location information of the wind turbine generator set and the topographic map of its construction platform can be first obtained. The wind farm topographic map can be obtained through measured or public Shuttle Radar Topography Mission (SRTM) data. Preferably, a high-resolution measured topographic map can be selected to ensure the accuracy of the high slope terrain and wind resource assessment. Then, the wind farm topographic map is processed according to the topography of the unit construction platform, and the contour lines at the unit platform position are deleted and spliced ​​through the corresponding longitude and latitude information to obtain a contour line topographic map containing high slopes, and then the topographic map containing high slopes is modeled.

[0035] In addition, the wind turbine can also be structurally modeled based on the structural parameters of the wind turbine. As an example, a 3D design software can be used to create a geometric model of the wind turbine, such as the impeller, tower, and other geometric models of the wind turbine. The geometric model can be appropriately simplified and cleaned up as needed to reduce the amount of calculation without affecting key flow features.

[0036] When simulating and evaluating wind resources, they can be divided into multiple sectors according to the direction of the incoming flow. The wind power industry usually uses 16 uniform sectors, and wind resource simulation and evaluation can be performed on each sector.

[0037] As an example, the simulation process may generally include grid generation, boundary condition setting, and simulation setting, etc., until the simulation results converge. Usually, the flow field simulation results are stored by sector, and the grid generation can use a non-structured grid. Taking high slope terrain as an example, the height is usually 10 to 30 meters, and the horizontal resolution and vertical resolution of the grid must be small enough to the meter level to ensure that the grid can fully resolve the high slope area. The description of the boundary condition setting and simulation setting steps is omitted here, and the specific setting steps can all adopt the common methods of numerical simulation of wind farms in the industry.

[0038] Reference Figure 2 , considering the calculation accuracy and speed, the impeller surface grid calculation area can be composed of 13×13 grid points. However, this is just an example. The impeller surface grid calculation area can be composed of 10×10 grid points. The grid points covered by the impeller surface are displayed in dark gray, and the grid points not covered by the impeller surface are displayed in light gray. The number of impeller surface grid points can be determined according to the diameter of the impeller. 13×13 is a relatively reasonable configuration and a relatively high-precision setting. The specific number can be analyzed based on the verification situation of the project.

[0039] Preferably, the distance between each grid point may be less than or equal to 10 meters, that is, the side length d of the square grid area formed by four grid points may be less than or equal to 10 meters, and each grid area may correspond to a part of the impeller surface, thereby, the impeller surface may be divided into multiple parts. The CFD flow field simulation results may include various simulation parameters, such as wind speed distribution (including wind speed magnitude and direction at different positions), pressure distribution, turbulence intensity (to evaluate the turbulence degree of airflow), aerodynamic load (force and torque acting on wind turbine blades, towers and other components), and the like. Figure 2 The shapes of the mesh regions shown are merely examples, and the mesh regions may also have other shapes, such as triangles, etc.

[0040] In addition, the divided grid can be a uniform grid, that is, the size of each grid is the same, in which case the calculation can be simplified. In addition, the divided grid can also be a non-uniform grid, that is, a non-uniform grid can be used according to the characteristics of the impeller surface and the flow characteristics. For example, a finer grid is used in areas where the flow changes violently and the physical quantity gradient is large (such as near the impeller, boundary layer, etc.) to more accurately capture the flow details, while a coarser grid is used in areas where the flow is relatively stable and the physical quantity changes are small, so as to reduce the amount of calculation and improve the calculation efficiency.

[0041] In step S320, simulated wind parameters of a plurality of grid areas of the impeller surface of the wind turbine generator set divided based on a plurality of grid points are extracted from the flow field simulation results. Each grid area may correspond to an area of ​​the impeller surface.

[0042] As an example, the required simulation wind parameters can be extracted from the solver of the CFD simulation software itself, or the flow field simulation results can be processed to obtain the required simulation wind parameters. As an example, the results can be analyzed and processed more complexly and carefully through special post-processing software to obtain the required simulation wind parameters.

[0043] The traditional method only needs to extract the wind speed at the center of the hub from the numerical results. However, unlike the traditional method, the present invention extracts the simulated wind speed of multiple grid points on the impeller surface, and then synthesizes the equivalent wind speed by the area ratio method of the grid area.

[0044] In step S330, the equivalent wind speed is synthesized using the first wind speed obtained based on the simulated wind parameter and the area of ​​each grid point. The first wind speed here may be the wind speed of each grid area (i.e., the wind speed at a certain part of the impeller surface), and the wind speed of each grid area may be the average wind speed of the grid area, which can be calculated by the average wind speed of the grid points covered by each grid area. In addition, as an example, the wind speed of any grid point in each grid area may also be selected as the wind speed of the grid area.

[0045] Reference Figure 4 The step S330 of synthesizing the equivalent wind speed by using the first wind speed obtained based on the simulated wind parameter and the area of ​​each grid point includes step S331 and step S332.

[0046] In step S331, the area ratio of each grid area is obtained according to the ratio of the area occupied by each grid area to the total area of ​​the impeller surface.

[0047] Reference Figure 2 Taking the square grid area as an example, each grid area near the middle part occupies the same area. In the case of a non-uniform grid, the area occupied by each grid area may be different. In addition, in the case of a uniform grid, the edge portion of the impeller surface may correspond to a portion of the grid area. In this case, only the covered portion of the grid area can be considered to calculate the area share and wind speed. As an example, when the area share of the grid area portion corresponding to the edge portion of the impeller surface is greater than a preset threshold (for example, the ratio of the area of ​​the portion to the total area of ​​the corresponding single grid area is greater than 30%), when calculating the area share, the share can be calculated based on the entire grid area.

[0048] In step S332, the equivalent wind speed is calculated based on the first wind speed of each grid area and the corresponding area ratio. The equivalent wind speed may be the cube root of the sum of the products of the cube of the first wind speed of all grid areas and the corresponding area ratio.

[0049] Equivalent wind speed V eq The specific calculation method of can be shown in the following formula (1):

[0050]

[0051] In formula (1):

[0052] n h represents the number of impeller surface blocks (or the number of grid areas covered by the impeller surface), V i represents the wind speed of the i-th part (i-th grid area) of the impeller surface (i.e., the first wind speed), in m / s, A represents the total area of ​​the impeller surface, and the calculation formula is A = πD 2 / 4, unit is m 2 , D is the diameter of the impeller surface, A i Represents the area of ​​the i-th part of the impeller surface, in m 2 .

[0053] Formula (1) is only an example for calculating the equivalent wind speed on the impeller surface. The equivalent wind speed on the impeller surface can also be calculated based on other calculation formulas of the first wind speed and area ratio of the grid area.

[0054] The first wind speed mentioned above may be a wind speed obtained by correcting the simulated wind speed in the simulated wind parameter.

[0055] Specifically, refer to Figure 5 The first wind speed can be obtained through step S321, step S322 and step S323.

[0056] In step S321, historical crosswind data of the wind turbine generator set is obtained.

[0057] As an example, a wind measurement data sequence of at least one year at the location of the wind turbine generator set may be read, and the completeness rate of the crosswind data sequence is preferably above 90%.

[0058] In step S322, the wind speed is divided into a plurality of wind speed intervals and the average wind speeds in different wind speed intervals are calculated based on the historical crosswind data.

[0059] According to an embodiment of the present disclosure, the wind speed and wind direction may be divided into a plurality of wind speed intervals, and then information such as the average wind speed and wind frequency ratio in different intervals may be statistically analyzed.

[0060] In step S323, for each grid area, the first wind speed is calculated according to the product of the ratio of the simulated wind speed of the wind turbine generator set to the simulated wind speed at the wind tower position of the wind turbine generator set and the average wind speed.

[0061] Specifically, the first wind speed can be calculated by the following formula (2).

[0062]

[0063] In formula (2), V wt_CFD and V mast_CFD It indicates the CFD simulated wind speed at the location of the wind turbine and the CFD simulated wind speed at the location of the wind tower, both in m / s, V mast_real , V wt_real They represent the wind speed measured by the wind tower and the corrected wind speed of each grid area or grid point on the impeller surface of the wind turbine, in m / s. mast_real and V mast_CFD Indicates the actual wind speed at a certain height measured by the wind tower and the CFD simulated wind speed at that height, V wt_CFD , which can be the simulated wind speed of each grid point or grid area. The first wind speed of each grid area can be obtained through the above correction method.

[0064] The above correction method is only a preferred embodiment. The present disclosure does not need to correct the simulated wind speed, but can directly use the simulated wind speed to perform synthetic calculation of the equivalent wind speed.

[0065] In step S340, the power generation of the wind turbine generator set is evaluated according to the equivalent wind speed and a predetermined power curve.

[0066] As an example, the power curve may be replaced by an equivalent power curve, and the power generation of the wind turbine may be calculated based on the equivalent wind speed distribution of the wind turbine in different wind speed ranges in combination with the equivalent power curve.

[0067] The step of evaluating the power generation of the wind generator set according to the equivalent wind speed and the predetermined power curve includes: calculating the power generation of the wind generator set according to the product of the equivalent power curve, the equivalent wind speed and the wind frequency.

[0068] As an example, during the calculation process, the cut-in wind speed and the cut-out wind speed may be considered (ie, the power less than the cut-in wind speed and the power greater than the cut-out wind speed are not considered), and the power generation calculation method may be as shown in the following formula (3).

[0069]

[0070] In formula (3), N θ Indicates the number of sectors, N u Indicates the number of wind speed segments, P i (U n ) indicates that the equivalent wind speed is U n The equivalent power corresponding to the time is W; f i (U n ,θ m ) represents θ m Wind speed U under sector angle n frequency (i.e., wind frequency).

[0071] That is to say, the equivalent power curve can be used as the power curve. Specifically, the equivalent power curve of the wind turbine generator set can be obtained by inputting the first wind speed and the wind direction data in the simulation wind parameter into the load simulation model.

[0072] Specifically, the unit can be statically modeled using the simulated wind parameters on the impeller surface as input. For different incoming wind directions, the corresponding distribution relationship of the wind parameters on the impeller surface is used as input, and for different wind speed ranges, a single wind seed is used to simulate wind generation, thereby obtaining the equivalent power curve of the wind turbine generator set.

[0073] Figure 6 is a flow chart of a method for evaluating power generation of a wind turbine generator set according to a second embodiment of the present disclosure.

[0074] In step S610, a topographic map of the wind farm, location information of the wind turbines, and a topographic map of the wind turbine construction platform are obtained. In other words, relevant data on the geographical location of the wind farm, the layout of the wind turbines, and the construction platform can be collected.

[0075] In step S620, a high slope terrain map is generated and terrain modeling is performed. Specifically, the collected data can be used to create a detailed terrain model, including special terrain features such as high slopes. Here, the high slope terrain is only used as an example of the terrain where the wind turbine generator set is located, and the present disclosure is not limited thereto.

[0076] In step S630, a wind resource simulation evaluation of the wind farm is performed based on a numerical simulation method. Numerical simulation technology (such as wind farm simulation) is used to simulate the wind speed distribution in the wind farm and evaluate the wind energy resources. Specifically, the required simulation wind parameters can be obtained through CFD simulation calculation.

[0077] In step S640, the simulated wind speed of the impeller surface is extracted, and the crosswind data is processed, and then the wind speed correction is performed. According to the numerical simulation results, the wind speed of each grid area of ​​the impeller surface of the wind turbine is extracted and converted into an equivalent wind speed for subsequent analysis. The specific conversion calculation method and correction method can be described above and will not be repeated here.

[0078] In step S650, the simulated equivalent wind speed is synthesized. As described above, the area ratio of each grid area can be first obtained according to the ratio of the area occupied by each grid area to the total area of ​​the impeller surface. When determining the grid area covered by the impeller surface, when only a part of the grid area at the circumferential edge of the impeller surface is covered by the impeller surface, the area ratio can be calculated based on the entire part of the grid area, that is, the area ratio of the grid area is the same as the area of ​​the grid area at the center position.

[0079] As described above, each grid area near the middle part occupies the same area. Preferably, in the case of a uniform grid, each grid area occupies the same area. When calculating the equivalent wind speed by area ratio, the amount of calculation can be effectively reduced and the calculation method can be simplified. In addition, in the case of a non-uniform grid, the area occupied by each grid area may be different. In addition, as long as a portion of a grid area is covered by the impeller surface, the entire portion of the grid area can be considered when calculating the equivalent wind speed.

[0080] As an example, the equivalent wind speed may be calculated based on the corrected wind speed of each grid area and the corresponding area ratio of each grid area. The equivalent wind speed may be the cube root of the sum of the products of the cube of the corrected wind speed of all grid areas and the corresponding area ratio.

[0081] In step S660, an equivalent power curve is calculated. As described above, the equivalent power curve can be obtained by simulation calculation, and the equivalent power curve of the wind turbine generator set can be obtained by inputting the first wind speed and the wind direction data in the simulation wind parameter into the load simulation model. The power at different wind speeds is calculated by using the corrected equivalent wind speed and the equivalent power curve of the wind turbine generator set to obtain the efficiency curve (i.e., the equivalent power curve) of the wind turbine generator set.

[0082] In step S670, the power generation of the wind turbine generator set is evaluated. As described above, the power generation of the wind turbine generator set can be calculated based on the product of the calculated equivalent wind speed, the equivalent power curve obtained by the load simulation model, and the wind frequency. The specific calculation method can be described in the above formula (3). As an example, the power generation of each wind turbine generator set in the wind farm can be calculated to evaluate the power generation of the wind farm.

[0083] Figure 7 4 is a block diagram of a wind turbine generator system according to an embodiment of the present disclosure.

[0084] The power generation evaluation device 700 of a wind turbine generator set according to an embodiment of the present disclosure may include an acquisition module 710 , a calculation module 720 and an evaluation module 730 .

[0085] The acquisition module 710 may acquire the flow field simulation results of each sector of the wind farm to which the wind turbine generator set belongs and extract the simulation wind parameters of a plurality of grid points on the impeller surface of the wind turbine generator set from the flow field simulation results.

[0086] Specifically, the acquisition module 710 can acquire the flow field simulation of each sector of the wind farm to which the wind turbine generator belongs obtained by simulation software (e.g., computational fluid dynamics (CFD)). As an example, the acquisition module 710 itself can be part of a CFD fluid simulation module.

[0087] As an example, the acquisition module 710 may first acquire a wind farm topographic map of a wind turbine generator set, the location information of the wind turbine generator set, and a topographic map of a construction platform of the wind turbine generator set. Then, the acquisition module 710 may process the wind farm topographic map according to the topography of the construction platform of the wind turbine generator set, delete and splice the contour lines at the platform position of the wind turbine generator set through the corresponding longitude and latitude information, obtain a contour topographic map containing a high slope, and then model the topographic map containing a high slope.

[0088] In one example, the acquisition module 710 may acquire a structural model of a wind turbine generator set, and may appropriately simplify and clean up the geometric model as needed to reduce the amount of calculation.

[0089] When simulating and evaluating wind resources, the wind resources can be divided into multiple sectors according to the incoming flow direction. The wind power industry usually uses multiple uniform sectors and performs wind resource simulation and evaluation for each sector. The specific simulation steps are as described above and will not be repeated here.

[0090] In addition, it should be noted that the acquisition module 710 may also be a data reading module, which can directly read the required data from external simulation software, structural modeling software, etc. As an example, the acquisition module 710 may pre-process the read data to obtain the required simulation wind parameters.

[0091] The calculation module 720 may synthesize an equivalent wind speed according to the area ratio of each grid area and the wind speed of each grid area.

[0092] Specifically, the calculation module 720 can obtain the area share of each grid area according to the ratio of the area occupied by each grid area to the total area of ​​the impeller surface. Taking the square grid area as an example, each grid area near the middle part occupies the same area. In the case of a non-uniform grid, the area occupied by each grid area may be different. In addition, in the case of a uniform grid, the edge portion of the impeller surface may correspond to a part of the grid area. In this case, only the covered part of the grid area can be considered to calculate the area share and wind speed. As an example, when the area share of the grid area portion corresponding to the edge portion of the impeller surface is greater than a preset threshold (for example, the ratio of the area of ​​the portion to the total area of ​​the corresponding single grid area is greater than 30%), the entire portion of the grid area can be considered to calculate the area share.

[0093] The calculation module 720 may first obtain the area ratio of each grid area according to the ratio of the area occupied by each grid area to the total area of ​​the impeller surface, and then calculate the equivalent wind speed according to the first wind speed based on each grid area and the corresponding area ratio.

[0094] The equivalent wind speed may be the cube root of the sum of the products of the cube of the first wind speed of all grid areas and the corresponding area ratios. The specific calculation method may be as shown in the above formula (1).

[0095] In addition, although the above shows the process of first correcting and then calculating the equivalent wind speed, this is only an example. The equivalent wind speed can also be calculated first and then corrected. The specific process will not be repeated here.

[0096] The evaluation module 730 may evaluate the power generation of the wind turbine generator system according to the equivalent wind speed and a predetermined power curve.

[0097] The evaluation module 730 can replace the power curve with an equivalent power curve. In different wind speed ranges, the power generation of the wind turbine can be calculated based on the equivalent wind speed distribution of the wind turbine and combined with the equivalent power curve. As described above, the wind direction data in the first wind speed and the simulated wind parameter can be input into the load simulation model for simulation, so as to obtain the power under different wind speeds, thereby obtaining the corresponding equivalent power curve. The equivalent power curve can also be obtained through the above acquisition module 710.

[0098] The specific steps performed by the calculation module 720 and the evaluation module 730 are as described above and will not be repeated here.

[0099] When the systems, units or modules shown in the drawings are implemented in software, firmware, middleware or microcode, the program code or code segments for performing the corresponding operations may be stored in a computer-readable medium such as a storage medium, so that at least one processor or at least one computing device may perform the corresponding operations by reading and running the corresponding program code or code segments. In addition, the computer-readable medium or storage medium may cause the processor to execute the above-mentioned power generation evaluation method when the computer program is executed by the processor.

[0100] For example, according to an exemplary embodiment of the present disclosure, a computer device including a readable medium storing computer program instructions may be provided, wherein the instructions, when executed by at least one computing device, prompt the at least one computing device to perform at least one of the above steps.

[0101] The computing device according to an embodiment of the present disclosure includes a memory and a processor, the memory stores instructions or programs, and when the instructions or programs are executed by the processor, the processor is prompted to perform the above-mentioned power generation evaluation method. Examples of computer-readable storage media include: read-only memory (ROM), random access programmable read-only memory (PROM), electrically erasable programmable read-only memory (EEPROM), random access memory (RAM), dynamic random access memory (DRAM), static random access memory (SRAM), flash memory, non-volatile memory, CD-ROM, CD-R, CD+R, CD-RW, CD+RW, DVD-ROM, DVD-R, DVD+R, DVD-RW, DVD+RW, DVD-RAM, BD-ROM, BD-R, BD-R LTH, BD-RE, Blu-ray or optical disk storage, hard disk drive (HDD), solid state drive (SSD), card storage (such as, multimedia card, secure digital (SD) card or extreme digital (XD) card), magnetic tape, floppy disk, magneto-optical data storage device, optical data storage device, hard disk, solid state disk and any other device.

[0102] The instructions stored in the computer-readable storage medium can be executed in an environment deployed in a computer device such as a client, a host, an agent device, a server, etc. It should be noted that the instructions can also be used to perform additional steps in addition to the above steps or perform more specific processing when performing the above steps. The contents of these additional steps and further processing have been described in detail in reference to Figures 1 to 7 It is mentioned in the description of related devices and methods, so it will not be repeated here to avoid repetition.

[0103] It should be noted that the control method according to the exemplary embodiment of the present disclosure can completely rely on the operation of computer programs or instructions to realize the corresponding functions, that is, each device corresponds to each step in the functional architecture of the computer program, so that the entire system is called through a special software package (for example, lib library) to realize the corresponding function.

[0104] According to the embodiments of the present disclosure, by performing high-precision modeling and numerical simulation on the terrain where the wind turbine is located (for example, high slope terrain), the power generation is calculated using the equivalent wind speed and equivalent power curve calculated using the wind parameter distribution on the impeller surface, which is more in line with the actual wind condition characteristics and the power generation assessment is accurate.

[0105] According to the power generation evaluation method of the embodiment of the present disclosure, the equivalent wind speed of the impeller surface replaces the hub center wind speed, matches the power curve calculated based on the impeller surface wind speed, so as to evaluate the power generation of the wind turbine generator set.

[0106] The power generation assessment method according to the embodiment of the present disclosure fully considers the power generation assessment deviation caused by the uneven distribution of wind speed on the impeller surface, and can ensure the accuracy and reliability of the overall economic evaluation of the wind farm.

[0107] The specific implementation methods of the present disclosure are described in detail above. Although some embodiments have been shown and described, those skilled in the art should understand that these embodiments can be combined, modified and improved without departing from the principles and spirit of the present disclosure whose scope is defined by the claims and their equivalents. These combinations, modifications and improvements should also be within the scope of protection of the present disclosure.

Claims

1. A method for evaluating the power generation of a wind turbine generator set, characterized in that: The power generation evaluation method comprises: Obtain flow field simulation results for each sector of the wind farm to which the wind turbine generator set belongs; Extracting simulated wind parameters of a plurality of grid areas of the impeller surface of the wind turbine generator set divided based on a plurality of grid points from the flow field simulation result; Synthesizing an equivalent wind speed using the first wind speed obtained based on the simulated wind parameter and the area of ​​each grid region; The power generation of the wind turbine generator set is evaluated according to the equivalent wind speed and a predetermined power curve.

2. The method for evaluating the power generation of a wind turbine generator set according to claim 1, characterized in that: The step of synthesizing an equivalent wind speed by using the first wind speed obtained based on the simulated wind parameter and the area of ​​each grid region comprises: Obtaining the area ratio of each grid area according to the ratio of the area occupied by each grid area to the total area of ​​the impeller surface; The equivalent wind speed is calculated based on the first wind speed of each grid area and the corresponding area ratio.

3. The method for evaluating the power generation of a wind turbine generator set according to claim 2, characterized in that: The equivalent wind speed is the cube root of the sum of the products of the cube of the first wind speed of all grid areas and the corresponding area ratio.

4. The method for evaluating the power generation of a wind turbine generator set according to any one of claims 1 to 3, characterized in that: The first wind speed is obtained by correcting the simulated wind speed in the simulated wind parameter.

5. The method for evaluating the power generation of a wind turbine generator set according to claim 4, characterized in that: The step of obtaining the first wind speed by correcting the simulated wind speed in the simulated wind parameter comprises: Acquiring historical crosswind data of the wind turbine generator set; Dividing the wind speed into a plurality of wind speed intervals and calculating the average wind speed in different wind speed intervals based on the historical crosswind data; For each grid area, the first wind speed is calculated according to the product of the ratio of the simulated wind speed of the wind turbine generator set to the simulated wind speed at the wind tower position of the wind turbine generator set and the average wind speed.

6. The method for evaluating the power generation of a wind turbine generator set according to claim 1, characterized in that: The power curve is an equivalent power curve, and the equivalent power curve of the wind turbine generator set is obtained by inputting the first wind speed and the wind direction data in the simulated wind parameter into a load simulation model.

7. The method for evaluating the power generation of a wind turbine generator set according to claim 6, characterized in that: The step of evaluating the power generation of the wind generator set according to the equivalent wind speed and a predetermined power curve includes: calculating the power generation of the wind generator set according to the product of the equivalent power curve, the equivalent wind speed and the wind frequency.

8. A wind turbine generator set power generation assessment device, characterized in that: The power generation evaluation device comprises: An acquisition module, which acquires flow field simulation results of each sector of the wind farm to which the wind turbine generator set belongs and extracts simulated wind parameters of a plurality of grid areas of an impeller surface of the wind turbine generator set divided based on a plurality of grid points from the flow field simulation results; A calculation module, synthesizing an equivalent wind speed using the first wind speed obtained based on the simulated wind parameter and the area of ​​each grid region; An evaluation module is used to evaluate the power generation of the wind turbine generator set according to the equivalent wind speed and a predetermined power curve.

9. A computing device, characterized in that: The computing device comprises: processor; and, A memory connected to the processor; wherein, The memory stores a program or an instruction, and when the program or the instruction is executed by the processor, the processor is prompted to execute the power generation evaluation method of a wind turbine generator set according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a program or an instruction, and when the program or the instruction is executed by a processor, the processor is prompted to execute the method for evaluating power generation of a wind turbine generator set according to any one of claims 1 to 7.

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