Large-span flexible high-support fishing-light complementary system for irregular fishpond and design method

Abstract

The invention discloses a large-span flexible high-support fishing-light complementary system for an irregular fishpond and a design method. The large-span flexible high-support fishing-light complementary system comprises ground piles, stand columns, cross beams, steel strands and photovoltaic modules. Wherein the ground piles are arranged on a pond embankment of a pit pond or inside the pit pond, the stand columns are vertically arranged on the ground piles, the cross beams are arranged between the corresponding stand columns, the photovoltaic assemblies are arranged on the cross beams, one ends of the cross beams are connected with the steel strands, and the other ends of the steel strands are fixed to provide pulling force for the cross beams; the photovoltaic modules are sequentially arranged on the cross beam, and meanwhile all the photovoltaic modules are arranged in an arrayed mode. According to the method, the requirement that the ground piles are hit on the pond embankment is considered preferentially, and meanwhile the reasonability of mechanical load strength, generating capacity and manufacturing cost is considered.

Description

Technical Field

[0001] The invention belongs to the technical field of photovoltaic power generation, and in particular relates to a large-span flexible high-bracket fishing-photovoltaic complementary system for an irregular fish pond and a design method thereof. Background Art

[0002] In existing fish-solar complementary photovoltaic power generation projects, in pond-type plot projects, piling in water is generally prohibited, so the piles are generally designed on the pond embankment. Such ponds are generally irregular in layout, and need to be customized according to the actual layout and size of the pond embankment. The conventional standard array layout directly covers all pond plots, which cannot meet the needs. Summary of the invention

[0003] In order to solve the above technical problems, the present invention proposes an irregular fish pond large-span flexible high-support fish-light complementary system and a design method to solve the problems existing in the above-mentioned prior art.

[0004] To achieve the above object, the present invention provides a large-span flexible high-bracket fishing-light complementary system for irregular fish ponds, comprising:

[0005] Ground piles, columns, crossbeams, steel strands, and photovoltaic modules; wherein the ground piles are arranged on the embankment of a pond or inside the pond, columns are vertically arranged on the ground piles, crossbeams are arranged between the corresponding columns, photovoltaic modules are arranged on the crossbeams, one end of the crossbeam is connected to the steel strands, and the other end of the steel strands is fixed to provide tension for the crossbeams; photovoltaic modules are arranged in sequence on the crossbeams, and all photovoltaic modules are arranged in an array at the same time.

[0006] Optionally, the column is also arranged in the middle of the crossbeam to provide support for the crossbeam.

[0007] Optionally, the crossbeam is made of steel wire rope or a rigid structure.

[0008] On the other hand, the present invention also provides a design method for a large-span flexible high-support fishing-light complementary system in an irregular fish pond, comprising:

[0009] Determine the key design dimensional features according to the actual layout and size of the pond embankment; obtain the layout direction of the steel strands according to the key design dimensional features; arrange the photovoltaic modules along the layout direction of the steel strands; obtain the position of the ground piles according to the layout results of the photovoltaic modules; perform mechanical load analysis on the beams; optimize the layout of the fish-photovoltaic complementary system according to the results of the mechanical load analysis, and obtain the optimal design solution for the fish-photovoltaic complementary system.

[0010] Optionally, the process of obtaining key design dimension features includes:

[0011] The actual layout and size data of the pond embankment are obtained, and the area and size of the pond embankment are mapped according to the actual layout and size data. The area and size of the pond embankment are framed by the minimum rectangular range, and the framed results are regionally screened to obtain key design size features.

[0012] Optionally, the process of mechanically loading the beam includes:

[0013] A geometric model of the beam is constructed using finite element software, wherein the components in the geometric model include ground piles, columns, beams, steel strands, and photovoltaic modules. Steel strands are provided at both ends of the beam, and columns are provided at both ends and in the middle of the beam. The material properties of the geometric model are set according to the fish-photovoltaic complementary system, and a loading force is set for the beam, wherein the loading force is evenly distributed on the beam, and the loading force is related to the weight of the photovoltaic module. Stress simulation is performed on the geometric model to obtain stress data of the beam, and the loading force is gradually increased to obtain the failure stress of the beam.

[0014] Optionally, the process of optimizing the layout of the fish-solar complementary system according to the mechanical load analysis results includes:

[0015] Constructing a scheme to be optimized, wherein the scheme to be optimized includes the layout angle of the beam and the number and position of the columns; constructing constraint conditions, wherein the constraint condition is that the maximum stress of the beam does not exceed the maximum stress that can be borne; the objective function is to maximize the weighted sum of the irradiation time and the number of supporting columns, wherein the weight of the irradiation time is a positive value, and the weight of the number and position of the columns is a negative value;

[0016] The scheme to be optimized is iteratively updated, and the iteratively updated scheme is verified through constraints, and the verified scheme is evaluated through the objective function, and the next iterative update of the scheme to be optimized is performed based on the evaluated scheme until the number of iterations is maximized and the optimal design scheme is obtained.

[0017] Optionally, after obtaining the optimal design solution for the fish-photovoltaic complementary system, the method further includes: adjusting the arrangement shape of the beams and the layout positions of the columns in the optimal solution.

[0018] Optionally, after obtaining the optimal design plan for the fish-photovoltaic complementary system, the method also includes: designing a string circuit of photovoltaic modules according to the optimal design plan; configuring an inverter, a junction box, a box transformer, a collection line, a booster station, and a transmission line according to the string circuit design plan.

[0019] Compared with the prior art, the present invention has the following advantages and technical effects:

[0020] The orientation of the large-span flexible high bracket is determined according to the actual layout and size of the pond embankment, so as to carry out the layout of photovoltaic modules, string design, inverter and subsequent electrical component design. Priority is given to the requirement of driving the ground piles into the pond embankment, while taking into account the mechanical load strength, power generation and rationality of the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 A layout diagram of a pond according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the layout of a large-span flexible high-support fishing-photovoltaic complementary system according to an embodiment of the present invention;

[0024] Figure 3 This is a partial schematic diagram of a large-span flexible high-support fishing-photovoltaic complementary system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0027] The invention provides a large-span flexible high-bracket fish-photovoltaic complementary system for an irregular fish pond and a design method. The system comprises: ground piles, columns, crossbeams, steel strands, and photovoltaic modules. The method comprises the following steps: a first step: determining key design dimension features according to the actual layout and size of the pond embankment; a second step: determining the layout direction of the steel strands of the large-span flexible high-bracket fish-photovoltaic complementary system according to the key design dimension features; a third step: arranging photovoltaic modules along the direction of the steel strands; a fourth step: determining the position of the ground piles according to the pond embankment conditions; a fifth step: performing a mechanical load stress analysis; a sixth step: performing layout optimization according to the mechanical load stress analysis conditions; a seventh step: performing a string circuit design of the photovoltaic modules according to the optimized layout; and an eighth step: configuring an inverter, a junction box, a box transformer, a collector line, a booster station, and a transmission line according to the string circuit design scheme. The present invention determines the direction of the large-span flexible high bracket according to the actual layout and size of the pond embankment, so as to carry out the layout of photovoltaic modules, string design, inverter and subsequent electrical component design, giving priority to the requirement of driving the piles on the pond embankment, while taking into account the rationality of mechanical load strength, power generation and cost.

[0028] The above technical solution is described in detail:

[0029] like Figure 3 As shown, the present invention provides a large-span flexible high-bracket fishing-photovoltaic complementary system for irregular fish ponds, including: ground piles, columns, beams, steel strands, and photovoltaic modules;

[0030] In the above structure, ground piles are set on the pond bank or inside the pond, vertical columns are set on the ground piles, cross beams are set between the corresponding columns, photovoltaic modules are set on the cross beams, one end of the cross beam is connected to the steel strand, and the other end of the steel strand is fixed to provide tension for the cross beam. Photovoltaic modules are set on the cross beams in sequence, and all photovoltaic modules are arranged in an array.

[0031] Among them, ground piles are a kind of foundation reinforcement element used for equipment or buildings, usually made of reinforced concrete, prestressed concrete, steel products or composite materials. The main function is to strengthen the supporting structure and make the superstructure more stable. Columns are set on the ground piles. The columns serve as the vertical main structure, supporting the weight and load of the entire photovoltaic module and providing support for the beams. There are beams between the columns. The photovoltaic modules are set on the beams. The photovoltaic modules and related lines of the photovoltaic modules are carried through the beams. One end of the beam is connected to a steel strand, and the other end of the steel strand is fixed on the ground or foundation. The beam is pulled diagonally to provide support reaction force and improve the bearing capacity of the beam. The middle part of the beam can choose whether to add columns for support according to its length to increase the bearing length of the beam.

[0032] In the above content, the columns are set on the piles, and the supporting beams are fixed by the columns. The columns are made of steel or other rigid structures, and the beams can be made of steel wire ropes or rigid structures. The two ends of the beams are fixed with the rigid structure of the columns and the outer inclined steel strands to provide support reaction force, which can achieve a large span of 10 to 30 meters and adapt to situations such as ponds. It is only necessary to set the column foundation at a suitable position and tension the prestressed steel strands. Under the condition that the water level remains unchanged, the construction of rigid columns, foundations and flexible supports can be realized in lakes and fish ponds.

[0033] An independent foundation, i.e., a ground pile, is set under the columns at both ends of the flexible photovoltaic support. A diagonal steel strand is set on the outside of the column, and a counterweight-type independent foundation is set under the steel strand. The crossbeam above the flexible support generates an inward or downward horizontal tension or pressure on the top of the column, and the horizontal tension provided by the diagonal steel strand at the top of the column can balance the horizontal tension of the crossbeam. The diagonal steel strand has a vertical downward tension, and its vertical upward tension at the foundation position can be balanced by the pressure formed by the soil above the counterweight-type foundation.

[0034] Flexible support schemes are adopted according to the layout of photovoltaic modules. The scheme is divided into horizontal photovoltaic modules and vertical photovoltaic modules. Single span or multiple spans can be adopted according to actual conditions. However, due to site conditions, a single span often cannot meet the needs, and 2, 3 or even more spans are required. The steel strands or wire ropes are fixed to the end columns and middle columns by hinges or multiple bolts to reduce stress concentration. The above design scheme is conducive to the tensioning of steel strands or wire ropes and is easy to install, which can shorten the construction period and save costs.

[0035] Based on the same inventive concept, the present invention proposes a design method for a large-span flexible high-bracket fish-light complementary system in an irregular fish pond, referring to Figure 1-2 , the method comprising:

[0036] Step 1: Determine the key design dimension features based on the actual layout and dimensions of the pond embankment;

[0037] Step 2: Determine the layout direction of the steel strands of the large-span flexible high-support fishing-photovoltaic complementary system based on key design dimension characteristics;

[0038] Step 3: Arrange photovoltaic modules along the direction of the steel strands;

[0039] Step 4: Determine the location of the piles according to the conditions of the pond embankment;

[0040] Step 5: Conduct mechanical load analysis;

[0041] Step 6: Optimize the layout according to the mechanical load analysis;

[0042] Step 7: Design the string circuit of photovoltaic modules according to the optimized layout;

[0043] Step 8: Configure inverters, combiner boxes, box transformers, collection lines, booster stations, and transmission lines according to the string circuit design plan.

[0044] Specifically, in the first step, the process of determining key design dimension features based on the actual layout and dimensions of the pond embankment includes:

[0045] like Figure 1 As shown, the pond embankment is surveyed and mapped with high precision using drones or satellite images to obtain the actual layout and precise dimensions of the pond embankment, and the actual layout, i.e., distribution and dimensions of the pond embankment are counted to determine the area and size of the pond embankment, wherein the area is mapped to a coordinate system reduced in actual dimensions according to the distribution, wherein the y-axis direction of the coordinate system corresponds to the north-south direction of the actual situation, and the area of ​​the pond embankment without the top in the coordinate system is calculated according to the size, and the size of the area enclosed by the pond embankment is obtained by framing the area surrounded by the current pond embankment with a minimum rectangular range, and the size of the area divided by the current pond embankment is obtained by framing the area with the minimum rectangular range, and the ground piles and steel strands are set as far as possible on the pond embankment to cover as much as possible above the water surface of the pond.

[0046] Obtain information such as the slope, soil bearing capacity, and water level changes around the current pond embankment, determine the key design dimensional features of the current pond embankment area, and select areas suitable for setting up ground piles and columns based on the shape, slope, and water quality conditions of the pond embankment. Areas with excessive slopes, insufficient soil bearing capacity, and excessive water level changes can be eliminated, and no relevant settings will be made within the current pond embankment division area. The area range and size of the retained current pond embankment division area will be used as the key design dimensional features.

[0047] Specifically, the second step: Determine the layout direction of the steel strands of the large-span flexible high-support fishing-photovoltaic complementary system based on the key design size characteristics, including:

[0048] The layout direction of the steel strands is determined according to the area and size of the key design dimension features, wherein the layout direction of the steel strands is opposite to that of the beams on the plane. When the direction of the steel strands is determined, the direction of the beams or the layout direction of the photovoltaic components arranged on the beams is also determined. If the shortest distance between two adjacent pond embankment areas in the distribution is lower than the threshold, the layout direction of the steel strands of the two pond embankments is set to be the same, and a large-span flexible high-bracket fish-light complementary system is arranged on the two pond embankments in the current area as much as possible. The layout direction of the steel strands is set in the direction of the middle angle between the two points with the longest distance under the pond embankment area and the south direction. Among them, when the layout direction of two adjacent pond embankments in the distribution is the same, it is set in the direction of the middle angle between the two longest points in the two pond embankments and the south.

[0049] Specifically, the third step: arranging photovoltaic modules along the direction of the steel strands includes:

[0050] The arrangement of the photovoltaic components is determined along the arrangement direction of the steel strands. When the arrangement direction of the steel strands is determined, the photovoltaic components are arranged in the opposite direction of the arrangement direction in the simulation software, such as the drawing software. In the coordinate system, the arrangement direction or the angle of the beam carrying the photovoltaic components is determined based on the opposite direction of the arrangement direction. The interval between the front and rear photovoltaic components in the actual setting is determined to determine the interval between the beams in the vertical arrangement. The photovoltaic components on the beams are neatly arranged, and the interval between the beams in the vertical arrangement needs to meet the requirements of the photovoltaic components in the rear row. The lighting requirement for the PV modules is that the PV modules installed on the beams in the previous row do not block the PV modules in the next row. Under this requirement, the minimum vertical spacing between the beams is determined. The beams in the first row are arranged vertically at the southernmost position in the area of ​​the key design dimension features. At the same time, the beams in subsequent arrangements are arranged according to the vertical arrangement intervals. The starting point and end point of each beam are on the boundary of the area of ​​the key design dimension features. The beams are set in the area of ​​the key design dimension features as the layout and position of the PV modules.

[0051] Specifically, the fourth step: determining the location of the piles according to the conditions of the pond embankment includes:

[0052] Since the length of each simulated beam is too long to meet the actual load requirements, the beam is split into different sub-beams along different straight lines perpendicular to the direction of the beam. Each sub-beam is supported by columns set on two ground piles, so the split position of the sub-beam is used as the position of the ground pile. Different straight lines perpendicular to the direction of the beam are arranged at equal intervals. The first straight line intersects with one end of the longest beam, and subsequent straight lines are set.

[0053] Specifically, the fifth step: mechanical load analysis includes:

[0054] The above structure is simulated by finite element software, wherein a geometric model is constructed according to the above structure, wherein the longest beam is used as the simulation basis to construct the geometric model, and the components in the geometric model include piles, columns, beams, steel strands, and photovoltaic modules. Steel strands are set at both ends of the beam. The split sub-beams are supported by columns without using steel strands. The material properties of the geometric model are set according to the properties of the components used, and a loading force is set on the beam, wherein the loading force is evenly distributed on the beam, and the magnitude of the loading force is the same as the weight of the photovoltaic module to be set to characterize the load force of the photovoltaic module on the beam. In the finite element software, stress simulation is performed on the above geometric model to simulate whether fracture will occur. At the same time, the fracture stress (failure stress) of the beam is analyzed in the finite element software, and 80% of the failure stress is taken as the maximum stress that the beam can withstand.

[0055] Specifically, step 6: optimize the layout according to the mechanical load force analysis;

[0056] The above situation is simulated according to the mechanical load force analysis, and optimization targets are set to optimize the above contents. Among them, relevant optimization is carried out with the long irradiation time and the small number of supporting columns as the goals. The contents that need to be optimized include the layout angle of the beams and the number and position of the columns.

[0057] Among them, the layout angle of the beam and the number and position of the columns are taken as the scheme to be optimized, and the force in the above finite element analysis is taken as the constraint condition. The maximum stress of the beam in the finite element analysis cannot exceed the maximum stress that can be borne. The objective function is to maximize the weighted sum of the irradiation time and the number of supporting columns, wherein the weight of the irradiation time is a positive value, and the weight of the number and position of the columns is a negative value. The number and position of the columns represent the cost of construction. The irradiation time is determined according to the arrangement angle of the photovoltaic panel or the angle of the beam, which is a quadratic regression relationship between the irradiation time and the angle. When it is in the south direction or at an angle with the y-axis direction of the coordinate system, the irradiation time is the longest, and the other times are gradually shortened. The relationship between the irradiation time and the arrangement angle is fitted to calculate the irradiation time under different arrangement angles. The irradiation time is related to the power generation of the photovoltaic module. The above scheme to be optimized is designed and optimized through a large language model, so that the above optimization scheme takes into account the load, cost and power generation.

[0058] The large language model generates n solutions to be optimized based on the above initial solution, where the solutions to be optimized include the layout angle of the beam and the number and position of the columns. In each subsequent iteration, the large language model (LLM) randomly generates m solutions to be optimized based on the task description and historical solutions. The task description includes some constraints and requirements for the output of the large model. The specific constraints include the number of columns and the restrictions on the layout angles, and the position of the columns must be on the beam. The output requirement is the number of better solutions generated according to the above objectives and the specific format of the LLM output.

[0059] The newly generated solution is passed to the finite element software for simulation to check whether it meets the relevant load requirements, and the objective function is used for calculation to obtain the corresponding evaluation score; the score of the new solution is compared with the original n solutions, and the n best solutions are retained for storage; the best n historical solutions are combined with the task description to generate a new meta-prompt; LLM then generates m new and better solutions based on the new meta-prompt, and repeats the previous steps; until the number of optimization steps reaches the maximum, the optimal solution is output, such as Figure 2 As shown, the above-mentioned optimized design is achieved through the optimal solution for the layout angle of the beams and the number and position of the columns.

[0060] Specifically, step 7: designing the string circuit of the photovoltaic modules according to the optimized layout;

[0061] After the optimal solution is generated, the layout points of the beams and columns are displayed in the coordinate system and regularized. The layout points of the corresponding columns are unified on the same straight line to facilitate construction, and the shape of the arrangement of the beams is regularized to make it a regular shape for easy construction. According to the regularized solution, the long-span flexible high-bracket fish-light complementary system is set, and the photovoltaic modules in the long-span flexible high-bracket fish-light complementary system are designed in series circuits. After connecting several photovoltaic modules in series, a circuit unit with a certain DC output is formed. The main purpose of this design is to match the operating voltage and current requirements of the system to ensure that the photovoltaic modules can work efficiently and stably.

[0062] The above are only preferred specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. Irregular fish pond large span flexible high bracket fish-light complementary system, characterized by: include: Ground piles, columns, crossbeams, steel strands, and photovoltaic modules; wherein the ground piles are arranged on the embankment of a pond or inside the pond, columns are vertically arranged on the ground piles, crossbeams are arranged between the corresponding columns, photovoltaic modules are arranged on the crossbeams, one end of the crossbeam is connected to the steel strands, and the other end of the steel strands is fixed to provide tension for the crossbeams; photovoltaic modules are arranged in sequence on the crossbeams, and all photovoltaic modules are arranged in an array at the same time.

2. The system according to claim 1, characterized in that The upright column is also arranged at the middle position of the cross beam to provide support for the cross beam.

3. The system according to claim 1, characterized in that The crossbeam is made of steel wire rope or rigid structure.

4. The design method of the irregular fish pond large span flexible high bracket fishing-light complementary system based on any one of claims 1-3 is characterized in that: include: Determine key design dimensional features based on the actual layout and dimensions of the pond embankment; The layout direction of the steel strands is obtained according to the key design dimension characteristics; the photovoltaic modules are arranged along the layout direction of the steel strands; the position of the ground piles is obtained according to the layout results of the photovoltaic modules; the mechanical load force analysis of the beams is carried out; the layout of the fish-photovoltaic complementary system is optimized according to the results of the mechanical load force analysis, and the optimal design solution of the fish-photovoltaic complementary system is obtained.

5. The method according to claim 4, characterized in that The process of obtaining key design dimension features includes: The actual layout and size data of the pond embankment are obtained, and the area and size of the pond embankment are mapped according to the actual layout and size data. The area and size of the pond embankment are framed by the minimum rectangular range, and the framed results are regionally screened to obtain key design size features.

6. The method according to claim 4, characterized in that The process of mechanical loading analysis on a beam includes: A geometric model of the beam is constructed using finite element software, wherein the components in the geometric model include ground piles, columns, beams, steel strands, and photovoltaic modules. Steel strands are provided at both ends of the beam, and columns are provided at both ends and in the middle of the beam. The material properties of the geometric model are set according to the fish-photovoltaic complementary system, and a loading force is set for the beam, wherein the loading force is evenly distributed on the beam, and the loading force is related to the weight of the photovoltaic module. Stress simulation is performed on the geometric model to obtain stress data of the beam, and the loading force is gradually increased to obtain the failure stress of the beam.

7. The method according to claim 4, characterized in that The process of optimizing the layout of the fish-solar complementary system based on the results of mechanical load analysis includes: Constructing a scheme to be optimized, wherein the scheme to be optimized includes the layout angle of the beam and the number and position of the columns; constructing constraint conditions, wherein the constraint condition is that the maximum stress of the beam does not exceed the maximum stress that can be borne; the objective function is to maximize the weighted sum of the irradiation time and the number of supporting columns, wherein the weight of the irradiation time is a positive value, and the weight of the number and position of the columns is a negative value; The scheme to be optimized is iteratively updated, and the iteratively updated scheme is verified through constraints, and the verified scheme is evaluated through the objective function, and the next iterative update of the scheme to be optimized is performed based on the evaluated scheme until the number of iterations is maximized and the optimal design scheme is obtained.

8. The method according to claim 4, characterized in that After obtaining the optimal design scheme of the fish-light complementary system, the method also includes: sorting out the arrangement shape of the beams and the layout positions of the columns in the optimal scheme.

9. The method according to claim 4, characterized in that After obtaining the optimal design plan for the fish-photovoltaic complementary system, it also includes: designing the string circuit of photovoltaic modules according to the optimal design plan; configuring inverters, junction boxes, box transformers, collection lines, booster stations, and transmission lines according to the string circuit design plan.

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