Method and system for evaluating strength of photovoltaic module

Abstract

The invention discloses a method and a system for evaluating the strength of a photovoltaic module. The method comprises the following steps: constructing a frame model, setting anchor points, creating a glass model, setting a connection mode of a fixing pair, and creating long-side mounting holes according to actual fixing hole positions of a frame assembly for applying fixing constraint; and calculating deformation and stress of the frame, obtaining deformation data of a plurality of points on the B side surface of the short frame of the model and deformation data of a plurality of points on the X symmetry axis of the glass from calculation results, and carrying out strength evaluation. By means of the method, the deformation condition of the frame after being loaded can be known in advance, the strength evaluation formula is established through data according to deformation and stress data, meanwhile, the photovoltaic frame structure can be parameterized through model construction, and the optimal frame structure under the limited condition can be found through the strength evaluation formula. And by using a connection mode of a connection pair in software, the calculation time can be shortened, the distortion condition is greatly reduced, and the efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of photovoltaic aluminum alloy frame components, and in particular to a method and system for evaluating the strength of a photovoltaic component. Background Art

[0002] Photovoltaic modules are devices that collect sunlight and generate electricity in the photovoltaic industry. They are composed of aluminum frames (including 2 long sides and 2 short sides), laminates in the middle (pressed by glass, solar cells, rubber molds, etc.) and structural adhesive in the middle of the aluminum frame. When assembling, the structural adhesive is inserted into the groove of the aluminum frame, and then the laminate is inserted into the groove. After the assembly is completed, the assembly is called a module. After the assembly, the module will be laid in an open and sunny place. In order to cope with the wind and snow pressure in the environment, the module will be subjected to a component load test before it is put into use to verify the strength of the module. The load test is to fix the module on the shelf at the installation hole position, apply a uniform load on the laminate, and observe the deformation of the module and the power generation efficiency of the laminate after loading to evaluate the strength of the module. When designing photovoltaic modules, designers cannot know the strength of the designed frame after the module is assembled. They only roughly judge its strength through the rotation torque. The error of such judgment is large, and it cannot be optimized and studied more accurately, and it is difficult to meet the lightweight requirements. Summary of the invention

[0003] To solve the above problems, the purpose of the present invention is to provide a method and system for evaluating the strength of photovoltaic modules, so as to evaluate the strength and quality of frame modules and to perform optimization analysis conveniently and quickly.

[0004] According to one aspect of the present invention, a method for evaluating the strength of a photovoltaic module is provided. The photovoltaic module is a frame module having a long side member, a corner connector, a short side member and a glass member. The frame module is formed in a symmetrical manner about the midline of the long side member and the short side member. The long side member and the short side member are both "Qiu"-shaped profiles with a cavity cross section. The cross-sectional profile includes an A side face, an A cavity face, a B side face, a C side face and a D side face which are adjacent in sequence. The method comprises the following steps:

[0005] S1: construct a model of a frame, wherein the constructed model has a corner of the frame component including a corner connector, and the peripheries are respectively a long side corresponding to half of the long side piece, a short side corresponding to half of the short side piece, a side X corresponding to the midline of the long side piece, and a side Y corresponding to the midline of the short side piece, 1 / 4 of the glass corresponding to the glass piece is located in the middle of the frame A side surface and the A cavity surface, and the corner connector is located in the center of the frame cavity surrounded by the A cavity surface, the B side surface, the C side surface, and the D side surface, wherein the lengths of the two end sides of the corner connector extending into the frame cavity located in the long side and the short side are respectively the first preset distance L1, the lower edge of the corner connector is the twelfth preset distance L12 from the C side surface, and the upper edge of the corner connector is the thirteenth preset distance L13 from the A cavity surface, and the long side and the short side are connected by the corner connector to form a model of the frame, so that the long side, the short side, the glass, and the corner connector are not in contact in space;

[0006] S2: setting anchor points, wherein anchor points are set on the D side surfaces on the inner side of the frame cavity, which are close to the corners of the long sides and the short sides, respectively, to simulate the fixing of the actual frame components;

[0007] S3: Create a glass model, wherein a load receiving portion for applying a pressure load is provided on the glass, wherein the glass has a connecting side portion I for establishing a connecting side with the long side and a connecting side portion II for establishing a connecting side with the short side, the connecting side portion I and the connecting side portion II are both rectangles with a fourth width L4, the distances between the connecting side portion I and the connecting side portion II and the corner vertex position are both the third predetermined distance L3, and the fifth predetermined distance L5 between the edge of the load receiving portion and the glass boundary is equal to the third predetermined distance L3 and is greater than the fourth width L4;

[0008] S4: Setting the connection mode of the fixed pair, wherein, the fixed pair 1: the reference surface is the connecting pair side part II that establishes the connecting pair with the short side, and the movable surface is the side surface A of the short side frame; the fixed pair 2: the reference surface is the connecting pair side part II that establishes the connecting pair with the short side, and the movable surface is the cavity surface A of the short frame; the fixed pair 3: the movable surface is the connecting pair side part I that establishes the connecting pair with the long side, and the movable surface is the side surface A of the long frame; the fixed pair 4: the reference surface is the connecting pair side part I that establishes the connecting pair with the long side, and the movable surface is the cavity surface A of the long frame; the fixed pair 5: the reference surface is the side of the corner connector extending into the short side, and the movable surface is the anchor point of the short side; the fixed pair 6: the reference surface is the side of the corner connector extending into the long side, and the movable surface is the anchor point of the long side;

[0009] S5: creating long side mounting holes according to the actual fixing hole positions of the frame components to apply fixing constraints;

[0010] S6: Calculate the deformation and stress of the frame, obtain the deformation data of multiple points on the B side surface of the short frame of the model and the deformation data of multiple points on the X-symmetry axis of the glass from the calculation results, and perform strength evaluation.

[0011] Preferably, S2: setting anchor points, wherein three equal-radius circular projection surfaces are set on the D side surfaces of the long sides and the short sides respectively close to the corners and forming the inner side of the frame cavity, that is, circle I, circle II, and circle III. These three circles serve as anchor points for establishing a fixed pair with the corner connector, the moving surface of the fixed pair five is the three circles on the short side; the moving surface of the fixed pair six is ​​the three circles on the long side.

[0012] Preferably, the S3: creates a glass model, creates equivalent long sides and equivalent short sides according to the frame cross-section of the frame assembly, cuts off a predetermined length at the connection between the equivalent long sides and the equivalent short sides, and creates a corner connector.

[0013] Preferably, the connecting side portions I of the long sides and II of the short sides are respectively rectangles with a fourth width L4 near the edges of the long sides and the short sides on the glass, and the rectangles are indented by a third width L3 at the corners.

[0014] Preferably, the shell unit thickness is set according to the thickness of the profile section, two interfaces perpendicular to the glass are set on the X side and the Y side, the material is set, aluminum alloy and glass materials are assigned respectively, the grid size is set, the load is set, and the deformation and stress conditions are calculated.

[0015] Preferably, the first deformation data of n points uniformly distributed on the B side surface of the short side of the model obtained in step S6 are set as D1~Dn, and the second deformation data of n points uniformly distributed on the X symmetry axis of the glass are set as B1~Bn, and the strength of the photovoltaic module is evaluated by the following strength evaluation formula:

[0016] r= ,

[0017] in, is the average value of the first deformation data, is the average value of the second deformation data, r is the matching value, and if the r result is above the preset threshold, the border strength is determined to be qualified.

[0018] According to another aspect of the present invention, there is provided a system for evaluating the strength of photovoltaic modules, which is used to implement the above-mentioned method for evaluating the strength of photovoltaic modules, and is characterized in that it includes: a module for constructing a model of a frame; a module for setting anchor points; a module for creating a glass model; a module for setting a connection method of a fixed pair; a module for applying fixed constraints; and a module for calculating the deformation and force of the frame for strength evaluation.

[0019] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein a computer program is stored in the storage medium; the computer program is used to be loaded and executed by a processor to implement the above method.

[0020] According to yet another aspect of the present invention, there is provided an electronic device, comprising a processor, a memory, and a computer program stored in the memory, wherein the processor loads and executes the computer program to implement the above method.

[0021] According to another aspect of the present invention, a computer program product is provided, comprising a computer program, wherein the computer program implements the above method when executed by a processor.

[0022] Beneficial effects of the present invention: By using the method of the present invention, the deformation of the frame after being loaded can be known in advance, and a strength evaluation formula can be established through the data according to the deformation and stress data. At the same time, the photovoltaic frame structure can be parameterized by building a model, and the optimal frame structure under limited conditions can be found through the strength evaluation formula. The connection method of the connection pair in the software can reduce the calculation time, greatly reduce the distortion, and improve efficiency. This method can also greatly reduce the design optimization cycle, and does not require sample preparation, which can reduce the test cost.

[0023] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the constructed model.

[0025] Figure 2 This is a diagram showing the division of glass and its various parts.

[0026] Figure 3 Schematic diagram of the three circular projections on the inner side of the long side cavity of the frame.

[0027] Figure 4 Schematic diagram of the model's corner details.

[0028] Figure 5 Schematic diagram of each short side.

[0029] Figure 6 This is an enlarged schematic diagram of the details of each part of the glass.

[0030] Figure 7 This is a schematic diagram of the location of the long side mounting holes.

[0031] Figure 8 Schematic diagram of the locations of the three circular projections.

[0032] Fig. 9 Schematic diagram of the corner connector penetrating into the cavity and detailed diagram of the cavity corner.

[0033] Fig.10Schematic diagram of the corner connector.

[0034] Fig.11 Schematic diagram of the relationship between the profile cavity, corner connectors and glass positions.

[0035] Fig.12 Schematic diagram of the interface settings for setting wall thickness in the software.

[0036] Fig.13 Schematic diagram of the interface settings for the software to set the B1 side symmetry boundary.

[0037] Fig.14 Schematic diagram of the interface settings for setting the B2 side symmetry boundary in the software.

[0038] Fig.15 Schematic diagram of the interface settings for setting materials in the software.

[0039] Fig.16 Schematic diagram of the interface settings for setting the grid for the software.

[0040] Fig.17 Schematic diagram of the interface settings for setting up a fixed pair in the software.

[0041] Fig.18 Schematic diagram of the interface settings for setting loads in the software.

[0042] Fig.19 Schematic diagram of the interface settings for setting constraints for the software.

[0043] Fig. 20 An example of deformation data points used in the strength evaluation formula is schematically shown.

[0044] Fig.21 A schematic diagram showing the comparison relationship between the constructed model and the actual frame component as a whole. DETAILED DESCRIPTION

[0045] The exemplary embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. The exemplary embodiments described below and shown in the accompanying drawings are intended to teach the principles of the present invention so that those skilled in the art can implement and use the present invention in several different environments and for several different applications. Therefore, the scope of protection of the present invention is defined by the appended claims, and the exemplary embodiments are not intended to be, and should not be considered to be, a limiting description of the scope of protection of the present invention. Moreover, for the convenience of description, the sizes of the various parts shown in the accompanying drawings are not necessarily drawn according to the actual proportional relationship, and the orientation description, such as the longitudinal direction corresponding to the longitudinal length of the main body, and the orientation or position relationship indicated by the upper, lower, left, right, top, bottom, etc., are all based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. Unless otherwise specifically stated, the order of the components and assembly steps described in the embodiments and the numerical values ​​do not limit the scope of the present invention. Moreover, any numerical range stated herein is intended to include all sub-ranges contained therein, and the numerical range represented by "value A to value B" refers to a range including the endpoint values ​​A and B. Those skilled in the art can understand that the terms "first", "Sn", "step" and the like in the present invention are only used to distinguish different steps, devices or modules, etc., and do not represent any specific technical meaning, nor do they indicate the necessary logical order between them. For example, two steps can be swapped or performed in parallel.

[0046] According to the method of an exemplary embodiment of the present invention, a model is constructed using simulation software to simulate an actual frame component load test, and the strength and performance of the frame component are evaluated by calculating the deformation when the load is applied. In the constructed model, glass is used instead of laminates, and the glass with the highest strength in the laminates is retained, and the others are simplified for ease of calculation. The connection method of the fixed pair is used to omit the complex structural adhesive during actual assembly, and the connection method of the frame corners is simplified, because the structural adhesive plays the role of connecting the glass and the frame in the component, and its thickness is very thin. It changes slightly when the component is deformed, but it does not care about the deformation and force during its change process. If a geometric model of the structural adhesive is constructed in the finite element model, it will make the calculation difficult, so the connection method of the connection pair in the software is used, as described later.

[0047] like Figure 1 , 5As shown in Figures 21, the photovoltaic module is a frame module having a long side member 31, a corner connector 2, a short side member 33 and a glass member 34. The frame module is constructed in a symmetrical manner about a center line X1 of the long side member 31 (see the corresponding side X) and a symmetrical manner about a center line Y1 of the short side member 33 (see the corresponding side Y). Both the long side member 31 and the short side member 33 are "Qiu"-shaped cross-sections with cavities, and the cross-sectional shape contours include: A side surface 9, A cavity surface 10, B side surface 11, C side surface 12 and D side surface 13.

[0048] A model with a corner position is constructed, and the size of the constructed model is 1 / 4 of the actual frame component, and the deformation and stress of the remaining parts are the same as this 1 / 4 model. The 1 / 4 model can reduce the scale and size of the model in the simulation software. More specifically, the constructed model has a corner position of the frame component including a corner connector 2, and the surroundings are respectively a long side 1 corresponding to half of the long side piece 31, a short side 3 corresponding to half of the short side piece 33, side X, and side Y. The glass 4 corresponding to 1 / 4 of the glass piece 34 is located in the middle position of the frame A side surface 9 and the A cavity surface 10, and the corner connector 2 is located in the center of the frame cavity 20 surrounded by the A cavity surface 10, the B side surface 11, the C side surface 12, and the D side surface 13 that are adjacent in sequence.

[0049] in other words, Figure 1 The model used as an example includes long side 1, corner connector 2, short side 3, and glass 4 (if there are other restrictions, you can add modules yourself), where both long and short sides are "Qiu"-shaped sections with cavities (frame cavity 20), and equivalent technology is used to simplify components such as structural adhesives and bolts and nuts. In the model, side X and side Y are symmetrical sides, that is, long side 1, corner connector 2, short side 3, and glass 4 are symmetrical about side X and side Y, and the end faces of long side 1 and short side 3 are each symmetrical to the corner vertex position (corresponding to the corner line of corner connector 2) by a distance of L2 (such as Fig. 9 As shown in the figure, the size is, for example, 20 mm. Since the long side 1 and the short side 3 do not extend to the corner, they are not in contact with each other but are connected via the corner connector 2. The glass 4 is located in the middle of the frame A side surface 9 and the A cavity surface 10, and the corner connector 2 is located in the center of the frame cavity 20 (the frame cavity 20 is the part surrounded by the A cavity surface 10, the B side surface 11, the C side surface 12, and the D side surface 13). The upper edge of the corner connector 2 is L13 away from the A cavity surface 10 (as shown in the figure). Fig.11 As shown), the size of L13 is, for example, 1 mm, and the distance between the lower edge and the C edge surface 12 is L12 (as shown Fig.11 As shown in FIG. 1 ), the size of L12 is, for example, 1 mm. The length of each side of the corner connector 2 penetrating into the frame cavity 20 is L1 (as shown in FIG. 1 ). Fig. 9 As shown), the size of L1 is, for example, 10 mm.

[0050] The long side 1 and the short side 3 are connected by the corner connector 2 to form a frame. Figure 3 As shown, three equal-radius circular projection surfaces are provided on the inner side D edge surface 13 of the cavity near the corner of the frame, namely, circle I 8.1, circle II 8.2, and circle III 8.3, to simulate the anchor points when the actual frame components are fixed, with a diameter of, for example, 3 mm, and the distance L6 between the center of circle II 8.2 and circle III 8.3 and the edge position of the frame is, for example, 5 mm, and the distance L7 between circle I 8.1 and the edge position of the frame is, for example, 9 mm. Figure 8 As shown, the distance L8 between circle II 8.2 and cavity surface A 10 in the vertical direction is, for example, 6 mm, the distance L9 between circle I 8.1 and cavity surface A 10 in the vertical direction is, for example, 10 mm, and the distance L10 between circle III 8.3 and cavity surface A 10 in the vertical direction is, for example, 14 mm. Accordingly, the number and position of the circular projections of the short side are the same as those of the long side, and will not be repeated.

[0051] like Figure 6 As shown, the glass 4 has a connecting side portion I5 that establishes a connecting side with the long side 1, and a connecting side portion II6 that establishes a connecting side with the short side 3. The connecting side portion I5 and the connecting side portion II6 are both rectangular, and the width L4 is, for example, 10 mm. The distance L3 between the connecting side portion I5 and the connecting side portion II6 and the vertex position of the corner is, for example, 15 mm. One side of the long side of the connecting side portion I5 and the connecting side portion II6 coincides with the edge of the glass 4 respectively.

[0052] The load receiving portion 7 is the load receiving portion 7 on the glass 4. That is, the load receiving portion 7 is the portion on the glass 4 that receives the load (see Fig.21 The yellow frame in the figure is the surface for applying pressure load, and the frame and glass will deform accordingly). The edge of the load receiving portion 7 is 15 mm away from the glass boundary L5.

[0053] The long side 1, the short side 3, the glass 4, and the corner connector 2 are not in contact in space, but are connected by fixed pairs, a total of 6 fixed pairs, and the two surfaces used to select the fixed pair connection, i.e., the reference surface and the moving surface, are set as follows:

[0054] Fixed pair 1: The reference surface is the connecting pair side Ⅱ6 that establishes the connecting pair with the short side 3, and the movable surface is the side surface of the short side frame A (given that the short side 3 and the long side 1 have similar structures, see Figure 5 Border A side surface 9 of the middle long side 1);

[0055] Fixed pair 2: The reference surface is the connecting pair side part Ⅱ6 that establishes a connecting pair with the short side 3, and the movable surface is the cavity surface of the short frame A (given that the short side 3 and the long side 1 have similar structures, see Figure 5 A cavity surface 10 of the middle long side 1);

[0056] Fixed pair 3: the movable surface is the connecting pair side portion Ⅰ5 that establishes a connecting pair with the long side 1, and the movable surface is the long frame A side surface 9;

[0057] Fixed pair 4: the reference surface is the connecting pair side part Ⅰ5 that establishes a connecting pair with the long side 1, and the movable surface is the long frame A cavity surface 10;

[0058] Fixed pair 5: The reference surface is the side where the corner connector 2 extends into the short side 3, and the moving surface is the three circles of the short side 3 (given that the short side 3 and the long side 1 have similar structures, see Figure 3 Circle I8.1, circle II8.2, circle III8.3 of the middle long side 1);

[0059] Fixed pair six: the reference surface is the side where the corner connector 2 extends into the long side 1, and the moving surface is the three circles of the long side 1, namely, circle I 8.1, circle II 8.2, and circle III 8.3.

[0060] like Figure 7 As shown, the added fixed constraint position is the long side mounting hole 14, which is a through hole on the long side 3 and can be set according to the actual frame position.

[0061] The shell elements used in the model are obtained from CAD modeling software and can be constructed based on the non-drawn middle surface method.

[0062] When in use, according to the frame section of the frame component, the equivalent shell model is extracted, and the equivalent long side and the equivalent short side are created in the 3D software. At the connection between the equivalent long side and the equivalent short side, such as Fig. 9 As shown, each predetermined length, for example, 20 mm, is cut off to create a corner connector 2. The distance L1 at both ends of the corner connector 2 extends into the cavity of the equivalent long side and the equivalent short side, respectively. L1 is set to 10 mm, for example. The position of the corner connector 2 is as shown in FIG. Fig.11 , 5 As shown, in the middle of the cavity B side surface 11 and the D side surface 13, a glass model is created, and the distance L11 between the glass boundary and the B side surface 11 of the long side 1 is, for example, 0.3 mm (the same arrangement is also used in the short side 3). In the center position of the A side surface 9 of the long side 1 and the A cavity surface 10 (the same arrangement is also used in the short side 3), the connecting side portion I5 of the long side 1 and the connecting side portion II6 of the short side 3 are created on the glass. They are rectangles with a width of L4=10 mm near the edges of the long side 1 and the short side 3 on the glass, and the indentation L3 at the corner position in the length direction is 15 mm, as shown in FIG. Figure 2 and Figure 6 .

[0063] like Figure 7 As shown, continue to create the long side mounting hole 14 according to the fixed hole position at the actual mounting position, so as to apply the fixed constraint in the software, and, as shown Figure 3 , 7 and Figure 8As shown, three circular projection surfaces are established on the D side surface 13 of the long side 1 (the same arrangement is also applied to the short side 3 ), namely circle I 8 . 1 , circle II 8 . 2 , and circle III 8 . 3 , which are used to establish a fixed pair with the corner connector 2 .

[0064] After the creation is completed, import it into the finite element software and set the shell element thickness according to the thickness of the profile section, such as Fig.12 As shown in Figure 2, two interfaces perpendicular to the glass are set on the X and Y sides, such as Fig.13 , Fig.14 As shown, set these two interfaces as symmetric surfaces, the finite element geometry model setting is completed, and the material setting is performed, such as Fig.15 As shown, aluminum alloy and glass materials are assigned, divided into grids, and the grid size is set to 3mm, such as Fig.16 As shown, a fixing pair of glass and frame is provided, such as Fig.17 As shown, finally set the boundary conditions, loads and fixed constraints, as shown Fig.18 , Fig.19 As shown, after submitting the calculation, the deformation and stress conditions can be obtained. For components of different sizes, only the frame length and the installation hole position need to be adjusted. After the results are calculated, the deformation data D1~D5 of 5 points evenly distributed on the side surface 11 of the short frame B of the model in the software and the deformation data B1~B5 of 5 points evenly distributed on the X-symmetric axis of the glass are taken. The strength evaluation formula is as follows:

[0065] r=

[0066] in, is the average value of D1~D5 data, is the average value of the data from B1 to B5, n=5, and r is the matching value. If the r result is above the preset threshold, for example, 0.6, it means that the frame is well matched with the glass and the frame strength is qualified.

[0067] The model provided above can perform equivalent simulation analysis on components of various profiles and formats, predict the deformation and stress of components in advance, and evaluate the strength of components by calculating matching values. Finally, sensitivity analysis is performed on parameters such as wall thickness and shape of components through full-factor experimental design. For example, the wall thickness of the frame A cavity surface 10, B side surface 11, C side surface 12, and D side surface 13 is set to different levels of values, and a numerical table of different wall thickness levels is established, such as Table 1 (where "wall thickness 10" represents the wall thickness of A cavity surface 10, and the same applies to the others). The value of wall thickness is selected according to design needs (where a certain threshold or range is a high level, and a certain threshold or range is a low level, for example, 1.6mm wall thickness is a high level, and 1.4mm wall thickness is a low level) and can be emphasized, compared and evaluated. By calculating the matching value of each combination, the optimal parameters of the photovoltaic cross section when the matching degree is the largest are found, the loss of sample preparation is reduced, and the competitiveness of new materials in the market is improved.

[0068] Table 1: Schematic diagram of different wall thickness combinations

[0069]

[0070] According to the method for evaluating the strength of a photovoltaic module of the present invention, a simulation model of a photovoltaic module is established by utilizing finite element simulation technology. The deformation and stress of the module when loaded can be predicted through calculation. The model includes an equivalent frame, a corner connector 2, a glass 4, and three circular points (circle I 8.1, circle II 8.2, and circle III 8.3) including equivalent anchor points on the frame. The position for establishing a fixed pair with the glass and the loading position are specified on the glass, and mounting holes are established on the long sides for loading loads.

[0071] As described above, the method is not limited to the exemplary software shown in the figure. First, a geometric model of the component profile is established, and a finite element model is created through the equivalent simplification concept. The component is simplified into a sheet structure with different wall thicknesses. The structural adhesive in the frame component is simplified by changing the connection method. The model consists of a long side, a short side, a glass, and a corner connector. The long side, the short side and the glass are fixedly connected, and the corner connector is fixedly connected to the long side and the short side. One side of the connection is the corner connector, and the other side is three dots on the frame. The dots are 1.5 mm in diameter. By setting the load value and importing the model into the calculation, the deformation and stress cloud map of the long side and the short side can be obtained. The deformation of the component and the deformation on the short side of the stress cloud map and the X-axis of symmetry of the glass are used to calculate the matching value to evaluate the frame strength.

[0072] In addition, the working process of the system for evaluating the strength of photovoltaic modules provided in this embodiment is the same as the working process of the above method, which includes corresponding modules, which will not be repeated here. Thus, the calculation for can be realized, which is consistent with the actual situation, improves the input accuracy of the simulation model, predicts the process more accurately, and may be implemented in many ways. The method and system of the present disclosure can be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above sequence of steps for the method is only for illustration, and the steps of the method of the present disclosure are not limited to the sequence described above, unless otherwise specified. In addition, in some embodiments, the present disclosure can also be implemented as a program recorded in a recording medium, which includes machine-readable instructions for implementing the method according to the present disclosure. Therefore, the present disclosure also covers a recording medium for storing a program for executing the method according to the present disclosure, such as a mobile disk, a hard disk, etc., on which a computer program is stored, and when the computer program is executed by a processor, the steps of the method executed in the embodiment are executed. It should also be pointed out that in the system and method of the present disclosure, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent schemes of the present disclosure. The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present disclosure. Therefore, the present disclosure is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0073] In the description of the present application, "several" means two or more, unless otherwise specifically defined. The embodiments of the present invention can be applied to electronic devices such as terminal devices, computer systems, servers, etc., which can operate with many other general or special computing system environments or configurations. Examples of well-known terminal devices, computing systems, environments and / or configurations suitable for use with electronic devices such as terminal devices, computer systems, servers, etc. include, but are not limited to: personal computer systems, server computer systems, thin clients, thick clients, handheld or laptop devices, microprocessor-based systems, set-top boxes, programmable consumer electronics, network personal computers, small computer systems, large computer systems, and distributed cloud computing technology environments including any of the above systems, etc. Terminal devices, computer systems, servers, etc. Electronic devices can be described in the general context of computer system executable instructions (such as program modules) executed by computer systems. Generally, program modules can include routines, programs, target programs, components, logic, data structures, etc., which perform specific tasks or implement specific abstract data types. Computer systems / servers can be implemented in distributed cloud computing environments, in which tasks are performed by remote processing devices linked through a communication network. In a distributed cloud computing environment, program modules may be located on local or remote computing system storage media including storage devices. Although the present invention has been described with reference to various specific embodiments, it should be understood that variations may be made within the spirit and scope of the described inventive concepts. Therefore, it is intended that the present invention is not limited to the described embodiments, but will have the full scope defined by the language of the appended claims.

Claims

1. A method for evaluating the strength of a photovoltaic module, the photovoltaic module being a frame module having a long side member (31), a corner connecting member (2), a short side member (33) and a glass member (34), the frame module being constructed in a symmetrical manner about the midline of the long side member (31) and the short side member (33), the long side member (31) and the short side member (33) both being "Qiu"-shaped profiles with cavities, the cross-sectional profiles comprising sequentially adjacent A side faces (9), A cavity faces (10), B side faces (11), C side faces (12) and D side faces (13), characterized in that: The steps include: S1: Construct a model of a frame, wherein the constructed model has a corner of the frame component including a corner connector (2), and the periphery includes a long side (1) corresponding to half of the long side piece (31), a short side (3) corresponding to half of the short side piece (33), a side X corresponding to the midline of the long side piece (31), and a side Y corresponding to the midline of the short side piece (33); 1 / 4 of the glass (4) corresponding to the glass piece (34) is located in the middle of the frame A side face (9) and the A cavity face (10); the corner connector (2) is located between the A cavity face (10), the B side face (11), the C side face (12), and the D side face ( 13), wherein the lengths of the two end sides of the corner connector (2) extending into the frame cavity (20) located in the long side (1) and the short side (3) are respectively a first preset distance L1, the distance between the lower edge of the corner connector (2) and the C side surface (12) is a twelfth preset distance L12, and the distance between the upper edge of the corner connector (2) and the A cavity surface is a thirteenth preset distance L13, and the long side (1) and the short side (3) are connected by the corner connector (2) to form a frame model, so that the long side (1), the short side (3), the glass (4), and the corner connector (2) are not in contact with each other in space; S2: setting anchor points, wherein anchor points are set on the D side surfaces (13) on the inner side of the frame cavity (20) respectively close to the corners of the long side (1) and the short side (3) to simulate the fixing of actual frame components; S3: creating a glass model, wherein a load receiving portion (7) for applying a pressure load is provided on the glass (4), and a connecting side portion I (5) for establishing a connecting side with the long side (1) and a connecting side portion II (6) for establishing a connecting side with the short side (3) are provided on the glass (4), the connecting side portion I (5) and the connecting side portion II (6) are both rectangles with a fourth width L4, the distances between the connecting side portion I (5) and the connecting side portion II (6) and the corner vertex position are both the third predetermined distance L3, and the fifth predetermined distance L5 between the edge of the load receiving portion (7) and the glass boundary is equal to the third predetermined distance L3 and is greater than the fourth width L4; S4: Setting a connection mode of the fixed pair, wherein the fixed pair 1: the reference surface is the connecting pair side portion II (6) for establishing a connecting pair with the short side (3), and the movable surface is the short side frame A side surface (9); the fixed pair 2: the reference surface is the connecting pair side portion II (6) for establishing a connecting pair with the short side (3), and the movable surface is the short frame A cavity surface (10); the fixed pair 3: the movable surface is the connecting pair side portion I (5) for establishing a connecting pair with the long side (1), and the movable surface is the long frame A side surface (9); the fixed pair 4: the reference surface is the connecting pair side portion I (5) for establishing a connecting pair with the long side (1), and the movable surface is the long frame A cavity surface (10); the fixed pair 5: the reference surface is the side of the corner connector (2) extending into the short side (3), and the movable surface is the anchor point of the short side (3); the fixed pair 6: the reference surface is the side of the corner connector (2) extending into the long side (1), and the movable surface is the anchor point of the long side (1); S5: creating long side mounting holes (14) according to actual fixing hole positions of the frame assembly, for applying fixing constraints; S6: Calculate the deformation and stress of the frame, obtain deformation data of multiple points on the side surface (11) of the short frame B of the model and deformation data of multiple points on the X-symmetric axis of the glass from the calculation results, and perform strength evaluation.

2. The method for evaluating the strength of a photovoltaic module according to claim 1, characterized in that: The S2: setting anchor points, wherein three equal-radius circular projection surfaces are set on the D side surface (13) of the long side (1) and the short side (3) respectively close to the corners and forming the inner side of the frame cavity (20), namely, circle I (8.1), circle II (8.2), and circle III (8.3) as anchor points for establishing a fixed pair with the corner connector (2), the movable surface of the fixed pair five being the three circles on the short side (3); and the movable surface of the fixed pair six being the three circles on the long side (1).

3. The method for evaluating the strength of a photovoltaic module according to claim 1, characterized in that: S3: creating a glass model, creating an equivalent long side and an equivalent short side according to the frame cross section of the frame assembly, cutting off a predetermined length at the connection between the equivalent long side and the equivalent short side, and creating a corner connector (2).

4. The method for evaluating the strength of a photovoltaic module according to claim 3, characterized in that: A connecting secondary side portion I (5) of the long side and a connecting secondary side portion II (6) of the short side are created on the glass, which are rectangles with a fourth width L4 near the edges of the long side and the short side of the glass, and the rectangles are indented by a third width L3 at the corners.

5. The method for evaluating the strength of a photovoltaic module according to claim 4, characterized in that: The shell unit thickness is set according to the thickness of the profile section, two interfaces perpendicular to the glass are set on the X and Y sides, and the material is set to assign aluminum alloy and glass materials respectively. The grid size is set, the load is set, and the deformation and stress conditions are calculated.

6. The method for evaluating the strength of a photovoltaic module according to claim 5, characterized in that: If the first deformation data of n points uniformly distributed on the B side surface (11) of the short side (3) of the model obtained in step S6 are set as D1~Dn, and the second deformation data of n points uniformly distributed on the X-symmetry axis of the glass are set as B1~Bn, the strength of the photovoltaic module is evaluated by the following strength evaluation formula: r= ， in, is the average value of the first deformation data, is the average value of the second deformation data, r is the matching value, and if the r result is above the preset threshold, the border strength is determined to be qualified.

7. A system for evaluating the strength of a photovoltaic module, used to implement the method for evaluating the strength of a photovoltaic module according to any one of claims 1 to 6, characterized in that: include: Module for building bounding box models; Module for setting anchor points; Module for creating glass models; A module for setting the connection mode of the fixed pair; a module for applying the fixed constraint; and a module for calculating the deformation and force of the frame for strength evaluation.

8. A computer-readable storage medium, characterized in that: The storage medium stores a computer program; the computer program is used to be loaded and executed by a processor to implement the method according to any one of claims 1 to 6.

9. An electronic device, characterized in that: The electronic device comprises a processor, a memory and a computer program stored in the memory, wherein the processor loads and executes the computer program to implement the method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

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