Component string arrangement design method, device, equipment and medium for large photovoltaic bases

Abstract

The present application discloses a method, device, equipment and medium for designing the arrangement of component strings in a large photovoltaic base, and relates to the field of resource assessment technology, including: constructing a three-dimensional geometric model according to the geographic information of the photovoltaic base, and generating an initial grid based on the three-dimensional geometric model; generating a final grid adapted to the current component string arrangement design information based on the initial grid; performing CFD processing on the wind flow according to the final grid, determining the stress condition of the component string, and obtaining the wind resource assessment result of the component string; evaluating the current component string arrangement design information according to the wind resource assessment result, and iterating the current component string arrangement design information based on the assessment result to obtain the final component string arrangement design information. The present application improves the accuracy of wind resource assessment by performing CFD simulation on the wind flow condition of the photovoltaic base, and realizes the rapid iteration of the arrangement design information through efficient pre-processing, thereby improving the engineering practicality of CFD simulation in wind resource assessment of large photovoltaic bases.

Description

Technical Field

[0001] The present invention relates to the technical field of resource assessment, and in particular to a component string arrangement design method, device, equipment and medium for a large photovoltaic base. Background Art

[0002] At present, large-scale photovoltaic bases are mostly built in deserts, Gobi, and other areas with strong northwest winds. There are a large number of photovoltaic modules, and the wind flow is very complex due to their arrangement. The wind resistance of photovoltaic modules under such complex conditions must be fully considered during the project design phase. The evaluation of the wind resistance of photovoltaic modules can be based on engineering experience models or mature CFD (Computational Fluid Dynamics) simulations. Due to the large number of module strings and the certain angle with the ground, it is very difficult to perform CFD simulations on large photovoltaic bases based on structural grids.

[0003] At present, the wind resource assessment for large-scale photovoltaic bases is mainly based on national standards, industry specifications, etc., which use a series of engineering experience models, which are highly efficient but have questionable accuracy. In particular, the flow conditions in large photovoltaic bases are complex, and engineering experience models cannot accurately describe them, and may even lead to misjudgments. CFD simulation is generally considered to be a more accurate tool, but its application in the assessment of the wind resistance of photovoltaic modules is common in academia and rarely used in industry. And because the pre-processing of CFD simulation is time-consuming and labor-intensive, most CFD simulation methods can only be applied to situations with a small number of module strings, and the efficiency is extremely low when it comes to design iterations of the module string arrangement, which is inconsistent with engineering reality.

[0004] In summary, how to improve the accuracy of wind resource assessment for large-scale photovoltaic bases and the iterative efficiency of component string arrangement design is a technical problem that needs to be solved urgently. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a method, device, equipment and medium for designing the arrangement of component strings in a large photovoltaic base, which can improve the accuracy of wind resource assessment for a large photovoltaic base and the iterative efficiency of the arrangement design of component strings. The specific scheme is as follows:

[0006] In a first aspect, the present application provides a method for designing a component string arrangement of a large photovoltaic base, comprising:

[0007] Constructing a corresponding three-dimensional geometric model according to the geographic information of the target photovoltaic base, and generating a grid corresponding to each component string in each potential component string arrangement design information based on the three-dimensional geometric model to obtain a corresponding initial grid;

[0008] Based on the initial grid and the preset grid attribute conditions, a final grid adapted to the component string in the current component string arrangement design information is generated;

[0009] Performing computational fluid dynamics simulation processing on the target wind flow according to the final grid and the preset turbulence model, and determining the stress condition of the component string under the target wind flow based on the corresponding computational fluid dynamics simulation results to obtain a wind resource assessment result for the component string;

[0010] The current component string arrangement design information is evaluated according to the wind resource evaluation result, and the current component string arrangement design information is iteratively processed based on the evaluation result of the current component string arrangement design information to obtain final component string arrangement design information.

[0011] Optionally, generating a mesh corresponding to each component string in each potential component string arrangement design information based on the three-dimensional geometric model to obtain a corresponding initial mesh includes:

[0012] Determine each geometric feature point corresponding to each component string based on the arrangement design information of each potential component string and the preset thickness information;

[0013] Generate a preset structured grid in the three-dimensional geometric model according to the geometric feature points to obtain the initial grid adapted to the arrangement design information of each potential component string, and save the initial grid to a preset storage device;

[0014] Accordingly, the iterative processing of the current component string arrangement design information based on the evaluation result of the current component string arrangement design information includes:

[0015] The initial grid is used to iteratively process the current component string arrangement design information based on an evaluation result of the current component string arrangement design information.

[0016] Optionally, the generating, based on the initial grid and the preset grid attribute conditions, a final grid adapted to the component string in the current component string arrangement design information includes:

[0017] Identify the initial grid based on the component string in the current component string arrangement design information to determine the grid to be adjusted corresponding to the component string;

[0018] The mesh properties of the mesh to be adjusted are adjusted according to the preset no-slip wall condition so as to adjust the mesh surface corresponding to the mesh to be adjusted from the original flowable surface to a non-flowable surface, so as to obtain the final mesh adapted to the component string in the current component string arrangement design information.

[0019] Optionally, performing computational fluid dynamics simulation processing on the target wind flow according to the final grid and the preset turbulence model includes:

[0020] Determining a target inflow boundary condition corresponding to the target wind flow based on the geographic information of the target photovoltaic base;

[0021] Performing the computational fluid dynamics simulation process on the target wind flow according to the final grid, the target inflow boundary condition, the first preset turbulence model and the first convergence condition to obtain a corresponding initial flow field;

[0022] The computational fluid dynamics simulation processing is performed on the target wind flow according to the initial flow field, the target inflow boundary condition, the second preset turbulence model and the second convergence condition; wherein the restriction degree corresponding to the first convergence condition is lower than the restriction degree corresponding to the second convergence condition.

[0023] Optionally, determining the stress condition of the component string under the target wind flow based on the corresponding computational fluid dynamics simulation result includes:

[0024] Extracting corresponding flow field information from the computational fluid dynamics simulation results based on the component string and a preset distance condition;

[0025] The flow field information is integrated according to the component string to determine the stress condition of the component string under the target wind flow.

[0026] Optionally, the evaluating the current component string arrangement design information according to the wind resource evaluation result includes:

[0027] Determine whether the stress condition of the component string in the current component string arrangement design information under the target wind flow meets the preset design load condition;

[0028] The current component string arrangement design information is optimized based on the corresponding judgment result to obtain the final component string arrangement design information that is compatible with the target photovoltaic base.

[0029] Optionally, the optimizing the current component string arrangement design information based on the corresponding judgment result to obtain the final component string arrangement design information adapted to the target photovoltaic base includes:

[0030] If the stress condition satisfies the preset design load condition, the current component string arrangement design information is directly determined as the final component string arrangement design information adapted to the target photovoltaic base;

[0031] If the stress condition does not meet the preset design load condition, a new grid to be adjusted is determined based on the initial grid, and a new final grid is generated based on the new grid to be adjusted, and the process jumps to the step of performing computational fluid dynamics simulation processing on the target wind flow according to the final grid and the preset turbulence model to obtain the final component string arrangement design information that is compatible with the target photovoltaic base.

[0032] In a second aspect, the present application provides a device for designing the arrangement of component strings in a large photovoltaic base, comprising:

[0033] An initial grid generation module is used to construct a corresponding three-dimensional geometric model according to the geographic information of the target photovoltaic base, and generate a grid corresponding to each component string in each potential component string arrangement design information based on the three-dimensional geometric model to obtain a corresponding initial grid;

[0034] A final grid determination module, used to generate a final grid adapted to the component string in the current component string arrangement design information based on the initial grid and preset grid attribute conditions;

[0035] A wind resource assessment module, used to perform computational fluid dynamics simulation processing on the target wind flow according to the final grid and the preset turbulence model, and determine the stress condition of the component string under the target wind flow based on the corresponding computational fluid dynamics simulation results, so as to obtain a wind resource assessment result for the component string;

[0036] A component string arrangement design module is used to evaluate the current component string arrangement design information according to the wind resource evaluation result, and iteratively process the current component string arrangement design information based on the evaluation result of the current component string arrangement design information to obtain final component string arrangement design information.

[0037] In a third aspect, the present application provides an electronic device, including:

[0038] Memory, used to store computer programs;

[0039] The processor is used to execute the computer program to implement the aforementioned component string arrangement design method for a large photovoltaic base.

[0040] In a fourth aspect, the present application provides a computer-readable storage medium for storing a computer program; wherein, when the computer program is executed by a processor, the aforementioned component string arrangement design method for a large photovoltaic base is implemented.

[0041] In the present application, a corresponding three-dimensional geometric model is first constructed according to the geographic information of the target photovoltaic base, and a grid corresponding to each component string in each potential component string arrangement design information is generated based on the three-dimensional geometric model to obtain a corresponding initial grid; then, based on the initial grid and the preset grid attribute conditions, a final grid adapted to the component string in the current component string arrangement design information is generated; then, according to the final grid and the preset turbulence model, a computational fluid dynamics simulation process is performed on the target wind flow, and based on the corresponding computational fluid dynamics simulation results, the stress condition of the component string under the target wind flow is determined to obtain a wind resource assessment result for the component string; finally, according to the wind resource assessment result, the current component string arrangement design information is evaluated, and based on the evaluation result of the current component string arrangement design information, the current component string arrangement design information is iteratively processed to obtain the final component string arrangement design information. As can be seen from the above, in this application, the initial grid is first divided from the three-dimensional geometric model corresponding to the target photovoltaic base based on the design information of each potential component string arrangement, and then the initial grid is adjusted based on the current component string arrangement design information to determine the final grid, and then the computational fluid dynamics simulation of the target wind flow is performed based on the final grid and the preset turbulence model, and the stress condition of the component string is determined based on the computational fluid dynamics simulation results, so as to complete the wind resource assessment for the component string, and the current component string arrangement design information is evaluated based on the wind resource assessment results, and then the current component string arrangement design information is iteratively processed based on the corresponding evaluation results to obtain the final component string arrangement design information that is compatible with the target photovoltaic base. In this way, this application greatly improves the accuracy of wind resource assessment by performing CFD simulation on the wind flow conditions of the photovoltaic base, and realizes the rapid iteration of arrangement design information through efficient pre-processing, which improves the engineering practicality of CFD simulation in wind resource assessment of large photovoltaic bases. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0043] Figure 1 A flow chart of a design method for component string arrangement of a large photovoltaic base provided in this application;

[0044] Figure 2 A flow chart of a specific method for designing the arrangement of component strings in a large photovoltaic base provided in this application;

[0045] Figure 3A schematic diagram of the arrangement of component strings in a specific target photovoltaic base provided in this application;

[0046] Figure 4 A schematic diagram of the wind flow structure inside a specific target photovoltaic base provided in this application;

[0047] Figure 5 A schematic diagram of the stress conditions of photovoltaic modules in a specific target photovoltaic base provided for this application;

[0048] Figure 6 A schematic diagram of the structure of a component string arrangement design device for a large photovoltaic base provided in this application;

[0049] Figure 7 A structural diagram of an electronic device provided for this application. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] At present, the wind resource assessment for large-scale photovoltaic bases is mainly based on national standards, industry specifications, etc., which adopts a series of engineering experience models, which are highly efficient, but the accuracy is questionable. In particular, the flow conditions in large-scale photovoltaic bases are complex, and the engineering experience model cannot accurately describe them, and may even lead to misjudgment. CFD simulation is generally considered to be a more accurate tool, but its application in the assessment of the wind resistance of photovoltaic modules is common in academia and rarely used in industry. And because the pre-processing of CFD simulation is time-consuming and labor-intensive, most CFD simulation methods can only be applied to situations where the number of component strings is small, and the efficiency is extremely low when iterating the design of the component string arrangement, which is inconsistent with the actual engineering. To this end, the present application provides a component string arrangement design scheme for a large photovoltaic base, which can improve the accuracy of wind resource assessment and the iterative efficiency of component string arrangement design for large photovoltaic bases.

[0052] See also Figure 1 As shown, an embodiment of the present invention discloses a method for designing a component string arrangement of a large photovoltaic base, which may include:

[0053] Step S11: construct a corresponding three-dimensional geometric model according to the geographic information of the target photovoltaic base, and generate a grid corresponding to each component string in each potential component string arrangement design information based on the three-dimensional geometric model to obtain a corresponding initial grid.

[0054] In this embodiment, it is first necessary to obtain the terrain data of the target photovoltaic base, including but not limited to elevation, slope, slope direction, etc., and then the terrain data can be preprocessed, such as format conversion, coordinate correction, etc. Finally, a three-dimensional geometric model surrounding the target photovoltaic base can be constructed through preset modeling software.

[0055] It can be understood that the above-mentioned generation of a grid corresponding to each component string in each potential component string arrangement design information based on the three-dimensional geometric model to obtain a corresponding initial grid may include: determining each geometric feature point corresponding to each component string based on the potential component string arrangement design information and the preset thickness information; generating a preset structured grid in the three-dimensional geometric model according to each geometric feature point to obtain the initial grid adapted to the potential component string arrangement design information, and saving the initial grid to a preset storage device; correspondingly, the iterative processing of the current component string arrangement design information based on the evaluation result of the current component string arrangement design information may include: using the initial grid to iteratively process the current component string arrangement design information based on the evaluation result of the current component string arrangement design information. Specifically, according to the initial and potential component string arrangement design information of the component string in the target photovoltaic base, the thickness information of the photovoltaic component can be ignored, the photovoltaic component can be abstracted as a virtual surface without thickness and the geometric feature points that can describe the position of the component string can be determined, wherein the component string arrangement design information includes but is not limited to the geometric features, longitudinal spacing, number of rows, inclination angle, etc. of the component string. The geometric feature points should fully consider the arrangement design information of each potential component string, not just the current component string arrangement design information. Then, a structured grid that is completely attached to the virtual surface of the component string can be generated in the three-dimensional geometric model corresponding to the target photovoltaic base based on the geometric feature points of the component string, that is, the grid points and the geometric feature points are completely overlapped, and the structured grid is close to the surface of the component string. The generated structured grid is the initial grid corresponding to the component string in the arrangement design information of each potential component string. The initial grid can be repeatedly used to iterate the current component string arrangement design information, so the initial grid needs to be saved to a preset storage device.

[0056] Step S12: Based on the initial grid and the preset grid attribute conditions, a final grid adapted to the component string in the current component string arrangement design information is generated.

[0057] In this embodiment, the generation of the final grid adapted to the component string in the current component string arrangement design information based on the initial grid and the preset grid attribute conditions may include: identifying the initial grid based on the component string in the current component string arrangement design information to determine the grid to be adjusted corresponding to the component string; adjusting the grid attributes of the grid to be adjusted according to the preset no-slip wall condition, so as to adjust the grid surface corresponding to the grid to be adjusted from the original traversable surface to a non-traversable surface, so as to obtain the final grid adapted to the component string in the current component string arrangement design information. Specifically, the initial grid corresponding to each component string in each potential component string arrangement design information is traversed, and the grid in the area where the component string in the current component string arrangement design information is located is identified to determine the grid to be adjusted corresponding to the component string in the current component string arrangement design information. Afterwards, the mesh properties of the mesh to be adjusted are adjusted without changing the structure, topological relationship, position and other information of the mesh to be adjusted. Only the thickness-free virtual surface of the mesh to be adjusted is adjusted to a no-slip wall surface, that is, the mesh surface corresponding to the mesh to be adjusted is adjusted from the original flowable surface to a non-flowable surface, thereby obtaining the final mesh corresponding to the component string in the current component string arrangement design information.

[0058] Step S13, performing computational fluid dynamics simulation processing on the target wind flow according to the final grid and the preset turbulence model, and determining the stress condition of the component string under the target wind flow based on the corresponding computational fluid dynamics simulation results to obtain a wind resource assessment result for the component string.

[0059] In this embodiment, the computational fluid dynamics simulation processing of the target wind flow according to the final grid and the preset turbulence model may include: determining the target inflow boundary condition corresponding to the target wind flow based on the geographic information of the target photovoltaic base; performing the computational fluid dynamics simulation processing on the target wind flow according to the final grid, the target inflow boundary condition, the first preset turbulence model and the first convergence condition to obtain the corresponding initial flow field; performing the computational fluid dynamics simulation processing on the target wind flow according to the initial flow field, the target inflow boundary condition, the second preset turbulence model and the second convergence condition; wherein the restriction degree corresponding to the first convergence condition is lower than the restriction degree corresponding to the second convergence condition. Specifically, it is necessary to determine the external conditions of the CFD simulation according to the local meteorological conditions of the location of the target photovoltaic base, such as key information such as the inflow wind profile and wind direction, and perform CFD simulation on the target wind flow in combination with the surface roughness information in the field area of ​​the target photovoltaic base. Among them, the simulated target inflow boundary conditions are as follows:

[0060] ;

[0061] ;

[0062] ;

[0063] Among them, U(z) represents the distribution of velocity with vertical height, z represents the vertical distance from the surface, and u * represents the local friction velocity, κ represents the von Karman constant, z0 represents the local roughness length, and L represents the Ophof length. Afterwards, the target wind flow is subjected to computational fluid dynamics simulation according to the final grid, the target inflow boundary condition, the standard k-ε model (i.e., the turbulent kinetic energy and turbulent dissipation rate model) and the first convergence condition, wherein the first convergence condition sets a looser convergence standard for equations such as residual, mass conservation, and momentum conservation. During the simulation process, pay close attention to the residual curve and other convergence indicators. If the simulation is stable and meets the convergence standard under the looser first convergence condition, the subsequent analysis can be continued. If the simulation is unstable or difficult to converge, the target inflow boundary condition or the first convergence condition can be adjusted. At the same time, since the grid quality is critical to the accuracy and convergence of the CFD simulation, it is necessary to ensure that the final grid used for the CFD simulation is of good quality without deformed units or excessive unit gradients. After obtaining the initial flow field, the target wind flow is simulated by computational fluid dynamics according to the initial flow field, target inflow boundary conditions, RNG k-ε model (Renormalization Group k-ε Model) and the second convergence condition until it is fully converged. In the second convergence condition, stricter convergence standards are set for residual, mass conservation, momentum conservation and other equations. During the simulation process, pay close attention to the changes in the residual curve and other convergence indicators to ensure that the simulation is carried out stably under the strict second convergence condition.

[0064] It can be understood that the above-mentioned determination of the stress condition of the component string under the target wind flow based on the corresponding computational fluid dynamics simulation results may include: extracting corresponding flow field information from the computational fluid dynamics simulation results based on the component string and the preset distance condition; integrating the flow field information according to the component string to determine the stress condition of the component string under the target wind flow. Specifically, for any component string in the current component string arrangement design information, the CFD simulation results near the component string can be extracted and processed based on the preset distance condition, and integrated on the surface of the component string to obtain the final stress condition of the component string. In a specific embodiment, the pressure, velocity and other flow field information of the plane at a preset vertical distance from the surface of the photovoltaic component can be extracted from the computational fluid dynamics simulation results. Specifically, the preset vertical distance can be expressed as:

[0065] ;

[0066] Among them, l is the vertical distance from the extraction result location to the photovoltaic module, Δ represents the thickness of the first layer of mesh close to the surface of the photovoltaic module, which can usually be taken as 12.5mm to ensure accuracy; α is the ratio of the vertical distance from the result extraction location to the photovoltaic module to the thickness of the first layer of mesh, which can usually be taken as 1.5.

[0067] Step S14: Evaluate the current component string arrangement design information according to the wind resource evaluation result, and iteratively process the current component string arrangement design information based on the evaluation result of the current component string arrangement design information to obtain final component string arrangement design information.

[0068] In this embodiment, the evaluation of the current component string arrangement design information according to the wind resource evaluation result may include: judging whether the stress condition of the component string under the target wind flow in the current component string arrangement design information meets the preset design load condition; optimizing the current component string arrangement design information based on the corresponding judgment result to obtain the final component string arrangement design information adapted to the target photovoltaic base. Specifically, the stress condition of the component string under the target wind flow is compared with the preset design load, so as to optimize the current component string arrangement design information based on the comparative analysis result to obtain the final component string arrangement design information adapted to the target photovoltaic base. Correspondingly, the optimization processing of the current component string arrangement design information based on the corresponding judgment result to obtain the final component string arrangement design information adapted to the target photovoltaic base may include: if the stress condition meets the preset design load condition, then directly determining the current component string arrangement design information as the final component string arrangement design information adapted to the target photovoltaic base; if the stress condition does not meet the preset design load condition, then determining a new grid to be adjusted based on the initial grid, and generating a new final grid based on the new grid to be adjusted, and jumping to the step of performing computational fluid dynamics simulation processing on the target wind flow according to the final grid and the preset turbulence model to obtain the final component string arrangement design information adapted to the target photovoltaic base. Specifically, if the stress condition of the component string under the target wind flow is less than the preset design load, then the current component string arrangement design information meets the design requirements and is output as the final design scheme. If the stress condition of the component string under the target wind flow is greater than the preset design load, the final grid can be efficiently iterated based on the initial grid without reconstructing the 3D geometric model and grid, until the stress condition of the component string under the target wind flow meets the preset design load condition, thereby obtaining the final component string arrangement design information that is compatible with the target photovoltaic base.

[0069] As can be seen from the above, in this embodiment, a corresponding three-dimensional geometric model is first constructed according to the geographic information of the target photovoltaic base, and a grid corresponding to each component string in each potential component string arrangement design information is generated based on the three-dimensional geometric model to obtain a corresponding initial grid; then, based on the initial grid and the preset grid attribute conditions, a final grid adapted to the component string in the current component string arrangement design information is generated; then, according to the final grid and the preset turbulence model, a computational fluid dynamics simulation process is performed on the target wind flow, and based on the corresponding computational fluid dynamics simulation results, the stress condition of the component string under the target wind flow is determined to obtain a wind resource assessment result for the component string; finally, according to the wind resource assessment result, the current component string arrangement design information is evaluated, and based on the evaluation result of the current component string arrangement design information, the current component string arrangement design information is iteratively processed to obtain the final component string arrangement design information. As can be seen from the above, in this embodiment, the initial grid is first divided from the three-dimensional geometric model corresponding to the target photovoltaic base based on the design information of each potential component string arrangement, and then the initial grid is adjusted based on the current component string arrangement design information to determine the final grid, and then the computational fluid dynamics simulation of the target wind flow is performed based on the final grid and the preset turbulence model, and the stress condition of the component string is determined based on the computational fluid dynamics simulation results, so as to complete the wind resource evaluation for the component string, and the current component string arrangement design information is evaluated based on the wind resource evaluation results, and then the current component string arrangement design information is iteratively processed based on the corresponding evaluation results to obtain the final component string arrangement design information that is compatible with the target photovoltaic base. In this way, the accuracy of the wind resource evaluation is greatly improved by performing CFD simulation on the wind flow conditions of the photovoltaic base, and the rapid iteration of the arrangement design information is achieved through efficient pre-processing, which improves the engineering practicality of CFD simulation in the wind resource evaluation of large photovoltaic bases.

[0070] See also Figure 2 As shown, in a specific implementation, the component string arrangement design process of a large photovoltaic base can be specifically as follows: construct a three-dimensional geometric model based on the geographic information of the large photovoltaic base; divide the structured body-fitting grid in the three-dimensional geometric model according to the initial design scheme of the component string in the large photovoltaic base and consider potential design schemes to obtain an initial grid; adjust the initial grid, adjust the grid where the component string is located to a no-slip wall, and obtain the final grid under the current design scheme; perform CFD simulation of multiple incoming wind directions based on the final grid; extract flow field information such as pressure and velocity from the CFD simulation results to obtain the stress condition of each photovoltaic component; based on the stress condition of the photovoltaic component and the design load, efficiently iterate the arrangement of the component string without reconstructing the three-dimensional geometric model and grid until the design requirements are met. Specifically, an actual large photovoltaic base in Northwest China is taken as the research object. See. Figure 3As shown, the arrangement of component strings in the target PV base is shown, and the blank area is the location of the transformer box. The naming rule of the component strings in the field area of ​​the target PV base is, from north (upper right corner of the picture) to south (lower left corner of the picture), they are row 1, row 2, row 3... from west to east, they are the west column (indicated by the English letter W), the middle column (indicated by the English letter M) and the east column (indicated by the English letter E), and so on. If the middle column is divided into multiple groups, such as the middle column of the 34th and 35th rows, W and E can also be used to represent the middle columns on the west and east sides, respectively. According to this naming rule, the component string on the west side of the 8th row and the middle column is numbered: 8W, and the component string on the west side of the 34th row and the middle column is numbered: 34M-W. In the case of northwest wind flow, refer to Figure 4 As shown, the wind flow structure inside the target photovoltaic base can be determined. After passing through multiple rows of irregularly arranged component strings, the wind flow situation in the target photovoltaic base is very complicated. It should be pointed out that due to the change of the flow channel from narrow to wide, a certain degree of flow acceleration occurs at the box transformer, which needs to be paid attention to when designing the arrangement of component strings. Figure 5 As shown, according to the stress conditions of the photovoltaic modules in the target photovoltaic base, it can be determined that the stress conditions of the module strings located near the box-type transformer are increased to a certain extent compared with the stress conditions of the other module strings in the same column.

[0071] As can be seen from the above, the use of structured grids for CFD simulation can ensure high precision and a low number of grids for scenes with complex geometry but high repeatability, such as large photovoltaic bases, so that CFD simulation has both accuracy and efficiency, and can more accurately design the arrangement of component strings; the CFD simulation method for wind flow conditions in photovoltaic bases avoids the problems caused by the large number of component strings and the large number of design iterations. Through a certain degree of simplification and grid preprocessing, a set of initial grids can be applied to the subsequent iterations of different component string design schemes, which greatly improves the engineering practicality of CFD simulation in wind resource assessment of large photovoltaic bases.

[0072] Accordingly, see Figure 6 As shown, the embodiment of the present application also provides a device for designing the arrangement of component strings in a large photovoltaic base, which may include:

[0073] An initial grid generation module 11 is used to construct a corresponding three-dimensional geometric model according to the geographic information of the target photovoltaic base, and generate a grid corresponding to each component string in each potential component string arrangement design information based on the three-dimensional geometric model to obtain a corresponding initial grid;

[0074] A final grid determination module 12 is used to generate a final grid that is adapted to the component string in the current component string arrangement design information based on the initial grid and the preset grid attribute conditions;

[0075] A wind resource assessment module 13 is used to perform computational fluid dynamics simulation processing on the target wind flow according to the final grid and the preset turbulence model, and determine the stress condition of the component string under the target wind flow based on the corresponding computational fluid dynamics simulation results to obtain a wind resource assessment result for the component string;

[0076] The component string arrangement design module 14 is used to evaluate the current component string arrangement design information according to the wind resource evaluation result, and iteratively process the current component string arrangement design information based on the evaluation result of the current component string arrangement design information to obtain the final component string arrangement design information.

[0077] As can be seen from the above, in the present application, a corresponding three-dimensional geometric model is first constructed according to the geographic information of the target photovoltaic base, and a grid corresponding to each component string in each potential component string arrangement design information is generated based on the three-dimensional geometric model to obtain a corresponding initial grid; then, based on the initial grid and the preset grid attribute conditions, a final grid adapted to the component string in the current component string arrangement design information is generated; then, according to the final grid and the preset turbulence model, a computational fluid dynamics simulation process is performed on the target wind flow, and based on the corresponding computational fluid dynamics simulation results, the stress condition of the component string under the target wind flow is determined to obtain a wind resource assessment result for the component string; finally, according to the wind resource assessment result, the current component string arrangement design information is evaluated, and based on the evaluation result of the current component string arrangement design information, the current component string arrangement design information is iteratively processed to obtain the final component string arrangement design information. As can be seen from the above, in this application, the initial grid is first divided from the three-dimensional geometric model corresponding to the target photovoltaic base based on the design information of each potential component string arrangement, and then the initial grid is adjusted based on the current component string arrangement design information to determine the final grid, and then the computational fluid dynamics simulation of the target wind flow is performed based on the final grid and the preset turbulence model, and the stress condition of the component string is determined based on the computational fluid dynamics simulation results, so as to complete the wind resource assessment for the component string, and the current component string arrangement design information is evaluated based on the wind resource assessment results, and then the current component string arrangement design information is iteratively processed based on the corresponding evaluation results to obtain the final component string arrangement design information that is compatible with the target photovoltaic base. In this way, this application greatly improves the accuracy of wind resource assessment by performing CFD simulation on the wind flow conditions of the photovoltaic base, and realizes the rapid iteration of arrangement design information through efficient pre-processing, which improves the engineering practicality of CFD simulation in wind resource assessment of large photovoltaic bases.

[0078] In some specific implementations, the initial grid generation module 11 may include:

[0079] A geometric feature point determination unit, configured to determine each geometric feature point corresponding to each component string based on the arrangement design information of each potential component string and the preset thickness information;

[0080] An initial grid generation unit is used to generate a preset structured grid in the three-dimensional geometric model according to the geometric feature points to obtain the initial grid adapted to the design information of the arrangement of each potential component string, and save the initial grid to a preset storage device.

[0081] In some specific implementations, the final grid determination module 12 may include:

[0082] An initial grid identification unit, used to identify the initial grid based on the component string in the current component string arrangement design information, so as to determine the grid to be adjusted corresponding to the component string;

[0083] The final grid determination unit is used to adjust the grid properties of the grid to be adjusted according to the preset no-slip wall condition, so as to adjust the grid surface corresponding to the grid to be adjusted from the original flowable surface to a non-flowable surface, so as to obtain the final grid adapted to the component string in the current component string arrangement design information.

[0084] In some specific implementations, the wind resource assessment module 13 may include:

[0085] A target inflow boundary condition determination unit, configured to determine a target inflow boundary condition corresponding to the target wind flow based on geographic information of the target photovoltaic base;

[0086] an initial flow field determination unit, configured to perform the computational fluid dynamics simulation process on the target wind flow according to the final grid, the target inflow boundary condition, the first preset turbulence model and the first convergence condition, so as to obtain a corresponding initial flow field;

[0087] A wind resource assessment unit is used to perform the computational fluid dynamics simulation processing on the target wind flow according to the initial flow field, the target inflow boundary condition, the second preset turbulence model and the second convergence condition; wherein the restriction degree corresponding to the first convergence condition is lower than the restriction degree corresponding to the second convergence condition.

[0088] In some specific implementations, the wind resource assessment module 13 may include:

[0089] A flow field information extraction unit, used to extract corresponding flow field information from the computational fluid dynamics simulation result based on the component string and a preset distance condition;

[0090] A stress condition determination unit is used to perform integration processing on the flow field information according to the component string to determine the stress condition of the component string under the target wind flow.

[0091] In some specific implementations, the component string arrangement design module 14 may include:

[0092] A condition judgment submodule, used to judge whether the stress condition of the component string under the target wind flow in the current component string arrangement design information meets the preset design load condition;

[0093] The component string arrangement design submodule is used to optimize the current component string arrangement design information based on the corresponding judgment result to obtain the final component string arrangement design information adapted to the target photovoltaic base.

[0094] In some specific implementations, the component string arrangement design submodule may include:

[0095] A first component string arrangement design unit, configured to directly determine the current component string arrangement design information as the final component string arrangement design information adapted to the target photovoltaic base if the stress condition satisfies the preset design load condition;

[0096] The second component string arrangement design unit is used to determine a new grid to be adjusted based on the initial grid if the stress condition does not meet the preset design load condition, and generate a new final grid based on the new grid to be adjusted, and jump to the step of performing computational fluid dynamics simulation processing on the target wind flow according to the final grid and the preset turbulence model to obtain the final component string arrangement design information adapted to the target photovoltaic base.

[0097] Furthermore, the present application also discloses an electronic device. Figure 7 It is a structural diagram of an electronic device 20 shown according to an exemplary embodiment, and the content in the figure cannot be regarded as any limitation on the scope of use of this application. The electronic device 20 may specifically include: at least one processor 21, at least one memory 22, a power supply 23, a communication interface 24, an input / output interface 25, and a communication bus 26. Among them, the memory 22 is used to store a computer program, and the computer program is loaded and executed by the processor 21 to implement the relevant steps in the component string arrangement design method of a large photovoltaic base disclosed in any of the aforementioned embodiments. In addition, the electronic device 20 in this embodiment may specifically be an electronic computer.

[0098] In this embodiment, the power supply 23 is used to provide working voltage for each hardware device on the electronic device 20; the communication interface 24 can create a data transmission channel between the electronic device 20 and the external device, and the communication protocol it follows is any communication protocol that can be applied to the technical solution of the present application, and is not specifically limited here; the input and output interface 25 is used to obtain external input data or output data to the outside world, and its specific interface type can be selected according to specific application needs and is not specifically limited here.

[0099] In addition, the memory 22, as a carrier for storing resources, can be a read-only memory, a random access memory, a disk or an optical disk, etc. The resources stored thereon can include an operating system 221, a computer program 222, etc., and the storage method can be temporary storage or permanent storage.

[0100] The operating system 221 is used to manage and control the hardware devices and computer program 222 on the electronic device 20, which can be Windows Server, Netware, Unix, Linux, etc. In addition to including a computer program that can be used to complete the component string arrangement design method of a large photovoltaic base executed by the electronic device 20 disclosed in any of the aforementioned embodiments, the computer program 222 can further include a computer program that can be used to complete other specific tasks.

[0101] Furthermore, the present application also discloses a computer-readable storage medium for storing a computer program; wherein, when the computer program is executed by a processor, the aforementioned disclosed method for designing the arrangement of component strings in a large photovoltaic base is implemented. The specific steps of the method can be referred to the corresponding contents disclosed in the aforementioned embodiments, and will not be repeated here.

[0102] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0103] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0104] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0105] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0106] The technical solution provided by the present application is introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for general technicians in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for designing the arrangement of component strings in a large photovoltaic base, characterized in that: include: Constructing a corresponding three-dimensional geometric model according to the geographic information of the target photovoltaic base, and generating a grid corresponding to each component string in each potential component string arrangement design information based on the three-dimensional geometric model to obtain a corresponding initial grid; Based on the initial grid and the preset grid attribute conditions, a final grid adapted to the component string in the current component string arrangement design information is generated; Performing computational fluid dynamics simulation processing on the target wind flow according to the final grid and the preset turbulence model, and determining the stress condition of the component string under the target wind flow based on the corresponding computational fluid dynamics simulation results to obtain a wind resource assessment result for the component string; Evaluate the current component string arrangement design information according to the wind resource evaluation result, and iteratively process the current component string arrangement design information based on the evaluation result of the current component string arrangement design information to obtain final component string arrangement design information; The step of generating a mesh corresponding to each component string in each potential component string arrangement design information based on the three-dimensional geometric model to obtain a corresponding initial mesh includes: Determine each geometric feature point corresponding to each component string based on the arrangement design information of each potential component string and the preset thickness information; Generate a preset structured grid in the three-dimensional geometric model according to the geometric feature points to obtain the initial grid adapted to the arrangement design information of each potential component string, and save the initial grid to a preset storage device; The generating, based on the initial grid and the preset grid attribute conditions, a final grid adapted to the component string in the current component string arrangement design information comprises: Identify the initial grid based on the component string in the current component string arrangement design information to determine the grid to be adjusted corresponding to the component string; Adjusting the mesh properties of the mesh to be adjusted according to the preset no-slip wall condition, so as to adjust the mesh surface corresponding to the mesh to be adjusted from the original flowable surface to a non-flowable surface, so as to obtain the final mesh adapted to the component string in the current component string arrangement design information; The performing computational fluid dynamics simulation processing on the target wind flow according to the final grid and the preset turbulence model includes: Determining a target inflow boundary condition corresponding to the target wind flow based on the geographic information of the target photovoltaic base; Performing the computational fluid dynamics simulation process on the target wind flow according to the final grid, the target inflow boundary condition, the first preset turbulence model and the first convergence condition to obtain a corresponding initial flow field; The computational fluid dynamics simulation processing is performed on the target wind flow according to the initial flow field, the target inflow boundary condition, the second preset turbulence model and the second convergence condition; wherein the restriction degree corresponding to the first convergence condition is lower than the restriction degree corresponding to the second convergence condition.

2. The method for designing the arrangement of component strings in a large photovoltaic base according to claim 1, characterized in that: The iterative processing of the current component string arrangement design information based on the evaluation result of the current component string arrangement design information includes: The initial grid is used to iteratively process the current component string arrangement design information based on an evaluation result of the current component string arrangement design information.

3. The method for designing the arrangement of component strings in a large photovoltaic base according to claim 1, characterized in that: The determining the stress condition of the component string under the target wind flow based on the corresponding computational fluid dynamics simulation results includes: Extracting corresponding flow field information from the computational fluid dynamics simulation results based on the component string and a preset distance condition; The flow field information is integrated according to the component string to determine the stress condition of the component string under the target wind flow.

4. The method for designing the arrangement of component strings in a large photovoltaic base according to any one of claims 1 to 3, characterized in that: The evaluating the current component string arrangement design information according to the wind resource evaluation result includes: Determine whether the stress condition of the component string in the current component string arrangement design information under the target wind flow meets the preset design load condition; The current component string arrangement design information is optimized based on the corresponding judgment result to obtain the final component string arrangement design information that is compatible with the target photovoltaic base.

5. The method for designing the arrangement of component strings in a large photovoltaic base according to claim 4, characterized in that: The optimizing process of the current component string arrangement design information based on the corresponding judgment result to obtain the final component string arrangement design information adapted to the target photovoltaic base includes: If the stress condition satisfies the preset design load condition, the current component string arrangement design information is directly determined as the final component string arrangement design information adapted to the target photovoltaic base; If the stress condition does not meet the preset design load condition, a new grid to be adjusted is determined based on the initial grid, and a new final grid is generated based on the new grid to be adjusted, and the process jumps to the step of performing computational fluid dynamics simulation processing on the target wind flow according to the final grid and the preset turbulence model to obtain the final component string arrangement design information that is compatible with the target photovoltaic base.

6. A device for designing the arrangement of component strings in a large photovoltaic base, characterized in that: include: An initial grid generation module is used to construct a corresponding three-dimensional geometric model according to the geographic information of the target photovoltaic base, and generate a grid corresponding to each component string in each potential component string arrangement design information based on the three-dimensional geometric model to obtain a corresponding initial grid; A final grid determination module, used to generate a final grid adapted to the component string in the current component string arrangement design information based on the initial grid and preset grid attribute conditions; A wind resource assessment module, used to perform computational fluid dynamics simulation processing on the target wind flow according to the final grid and the preset turbulence model, and determine the stress condition of the component string under the target wind flow based on the corresponding computational fluid dynamics simulation results, so as to obtain a wind resource assessment result for the component string; A component string arrangement design module, used to evaluate the current component string arrangement design information according to the wind resource evaluation result, and iteratively process the current component string arrangement design information based on the evaluation result of the current component string arrangement design information to obtain final component string arrangement design information; Wherein, the initial grid generation module includes: A geometric feature point determination unit, configured to determine each geometric feature point corresponding to each component string based on the arrangement design information of each potential component string and the preset thickness information; An initial grid generation unit, used for generating a preset structured grid in the three-dimensional geometric model according to the geometric feature points, so as to obtain the initial grid adapted to the arrangement design information of each potential component string, and saving the initial grid to a preset storage device; The final grid determination module comprises: An initial grid identification unit, used to identify the initial grid based on the component string in the current component string arrangement design information, so as to determine the grid to be adjusted corresponding to the component string; A final grid determination unit, used for adjusting the grid properties of the grid to be adjusted according to a preset no-slip wall condition, so as to adjust the grid surface corresponding to the grid to be adjusted from an original flowable surface to a non-flowable surface, so as to obtain the final grid adapted to the component string in the current component string arrangement design information; The wind resource assessment module comprises: A target inflow boundary condition determination unit, configured to determine a target inflow boundary condition corresponding to the target wind flow based on geographic information of the target photovoltaic base; an initial flow field determination unit, configured to perform the computational fluid dynamics simulation process on the target wind flow according to the final grid, the target inflow boundary condition, the first preset turbulence model and the first convergence condition, so as to obtain a corresponding initial flow field; A wind resource assessment unit is used to perform the computational fluid dynamics simulation processing on the target wind flow according to the initial flow field, the target inflow boundary condition, the second preset turbulence model and the second convergence condition; wherein the restriction degree corresponding to the first convergence condition is lower than the restriction degree corresponding to the second convergence condition.

7. An electronic device, characterized in that: The electronic device includes a processor and a memory; wherein the memory is used to store a computer program, and the computer program is loaded and executed by the processor to implement the component string arrangement design method for a large photovoltaic base as described in any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that: Used to store a computer program, which, when executed by a processor, implements the component string arrangement design method for a large photovoltaic base as described in any one of claims 1 to 5.

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