Photovoltaic system optimization method and device

Abstract

The embodiment of the present invention discloses a method and device for optimizing a photovoltaic system. The optimization method of the photovoltaic system includes: establishing a calculation model of the reflective irradiation gain of the reflective plate for the photovoltaic module based on the irradiation value received on the surface of the reflective plate; determining the reflective irradiation gain of the reflective plate for the photovoltaic module when the reflective plate is placed in different ways in the shadow area and non-shadow area between two adjacent rows of photovoltaic modules according to the calculation model; determining the placement of the reflective plate corresponding to the reflective irradiation gain that meets the preset conditions as the optimal placement of the reflective plate. This scheme realizes the determination of the optimal placement of the reflective plate in the shadow area and non-shadow area between two adjacent rows of photovoltaic modules, and determines the optimal placement of the reflective plate according to the reflective irradiation gain of the reflective plate for the photovoltaic module, which helps to use the additional light in the shadow area and non-shadow area of ​​the module to generate electricity, thereby increasing the power generation of the photovoltaic system.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of photovoltaic power generation, and in particular to a method and device for optimizing a photovoltaic system. Background Art

[0002] A photovoltaic system includes multiple rows of photovoltaic modules. In order to avoid shadows cast by the previous row of modules on the next row of modules, it is usually necessary to set a certain distance between adjacent rows of modules, so that the open space between adjacent rows of modules is larger, and most of the overall area of ​​the photovoltaic system is occupied by these open spaces, so that the solar radiation in this part of the space cannot be effectively utilized. Summary of the invention

[0003] An embodiment of the present invention provides a method and device for optimizing a photovoltaic system, so as to determine the optimal placement of a reflector based on the reflected irradiance gain of the reflector to the photovoltaic module, thereby utilizing the light within the shadow area and non-shadow area of ​​the module to generate electricity and improve the power generation of the photovoltaic system.

[0004] According to one aspect of the present invention, a method for optimizing a photovoltaic system is provided, wherein the photovoltaic system comprises a plurality of rows of photovoltaic modules, and a reflector is arranged between two adjacent rows of photovoltaic modules. The method for optimizing the photovoltaic system comprises:

[0005] Based on the irradiance value received by the surface of the reflector, a calculation model of the reflected irradiance gain of the reflector for the photovoltaic module is established;

[0006] Determine, according to the calculation model, the reflected irradiance gain of the reflector for the photovoltaic assembly when the reflector is placed in different ways in the shadow area and the non-shadow area between two adjacent rows of the photovoltaic assembly;

[0007] The placement mode of the reflector corresponding to the reflected irradiance gain that meets the preset conditions is determined as the optimal placement mode of the reflector.

[0008] Optionally, the calculation model is a calculation model of the reflected irradiance gain of the photovoltaic module at different positions on the surface of the reflector;

[0009] Based on the irradiance value received by the surface of the reflector, a calculation model of the reflected irradiance gain of the reflector for the photovoltaic module is established, including:

[0010] Determining the irradiance value received by the position point on the surface of the reflector according to whether the position point on the surface of the reflector is in a shadow area or a non-shadow area between two adjacent rows of photovoltaic modules;

[0011] Determining the reflected irradiance received by the photovoltaic assembly at a position point on the surface of the reflector;

[0012] A calculation model for the reflected radiation gain is established according to the radiation value received by the position point on the surface of the reflector, the reflectivity of the reflector, the reflected radiation reception and the length of the photovoltaic module.

[0013] Optionally, when the position point on the surface of the reflector is in a shadow area between two adjacent rows of photovoltaic modules, the irradiance value received by the position point on the surface of the reflector is a scattered irradiance value;

[0014] When the position point on the surface of the reflector is in the non-shadow area between two adjacent rows of photovoltaic modules, the irradiance value received by the position point on the surface of the reflector is a direct irradiance value and a scattered irradiance value.

[0015] Optionally, the scattered radiation value received by the position point on the surface of the reflector is the product of the plane scattered radiation value and the scattered reception coefficient of the position point on the surface of the reflector;

[0016] The scattered reception coefficient is the ratio of the total angle of the position point on the surface of the reflector that is not blocked by the photovoltaic component to the plane angle.

[0017] Optionally, the direct radiation value received by the position point on the surface of the reflector is the product of the standard direct radiation value and the direct radiation receiving coefficient of the position point on the surface of the reflector;

[0018] When the position point on the surface of the reflector is in a shadow area, the direct light reception coefficient is 0, and when the position point on the surface of the reflector is in a non-shadow area, the direct light reception coefficient is 1.

[0019] Optionally, the photovoltaic module includes a bifacial module, and the calculation model includes the sum of the reflected irradiance gain of the position point on the surface of the reflector for the front side of the module and the reflected irradiance gain of the back side of the module;

[0020] The reflected radiation gain of the front side of the module includes the sum of the direct radiation value and the scattered radiation value received by the position point on the surface of the reflector, the reflectivity of the reflector, and the ratio of the product of the reflected radiation receiving degree of the front side of the module for the position point on the surface of the reflector to the length of the photovoltaic module;

[0021] The reflected radiation gain on the back of the component includes the sum of the direct radiation value and the scattered radiation value received by the position point on the surface of the reflector, the reflectivity of the reflector, the reflected radiation receptivity of the back of the component for the position point on the surface of the reflector, and the ratio of the product of the bifacial factor of the photovoltaic component and the length of the photovoltaic component.

[0022] Optionally, determining, according to the calculation model, the reflected irradiance gain of the reflector for the photovoltaic assembly when the reflector is placed in different ways within the shadow area and non-shadow area between two adjacent rows of photovoltaic assemblies, includes:

[0023] Determine, according to the calculation model, the total reflected irradiance gain of each position point on the surface of the reflector for the photovoltaic assembly when the reflector is placed at different positions in the shadow area and non-shadow area between two adjacent rows of photovoltaic assemblies;

[0024] Determining the placement of the reflector corresponding to the reflected irradiance gain that meets the preset conditions as the optimal placement of the reflector includes:

[0025] The placement position of the reflector corresponding to the maximum total reflected irradiance gain is determined as the optimal placement position of the reflector.

[0026] Optionally, determining, according to the calculation model, the reflected irradiance gain of the reflector for the photovoltaic assembly when the reflector is placed in different ways within the shadow area and non-shadow area between two adjacent rows of photovoltaic assemblies, includes:

[0027] According to the calculation model, the total reflected irradiance gain of each position point on the surface of the reflector for the photovoltaic assembly is determined when the reflector is placed at different angles in the shadow area and non-shadow area between two adjacent rows of photovoltaic assemblies.

[0028] Optionally, the ground area between the reflector and one adjacent row of photovoltaic modules is the first area, and the ground area between the reflector and another adjacent row of photovoltaic modules is the second area;

[0029] The photovoltaic system optimization method further includes:

[0030] Calculate the reflected irradiance gain of the first area and the second area for the photovoltaic modules when the reflector is placed at different angles in the shadow area and the non-shadow area between two adjacent rows of the photovoltaic modules;

[0031] Determining the placement of the reflector corresponding to the reflected irradiance gain that meets the preset conditions as the optimal placement of the reflector includes:

[0032] The sum of the reflected irradiation gains of the first area, the second area and the reflector for the photovoltaic component is the target reflected irradiation gain, and the placement angle of the reflector corresponding to the maximum target reflected irradiation gain is determined as the optimal placement angle of the reflector.

[0033] Optionally, the photovoltaic system optimization method further includes:

[0034] Determine, according to the calculation model, the total reflected irradiance gain of each position point on the surface of the reflector for the photovoltaic assembly when the reflector is placed at different positions in the shadow area and non-shadow area between two adjacent rows of photovoltaic assemblies at the optimal placement angle;

[0035] The placement position of the reflector corresponding to the maximum total reflected irradiance gain is determined as the optimal placement position of the reflector.

[0036] Optionally, determining, according to the calculation model, the reflected irradiance gain of the reflector for the photovoltaic assembly when the reflector is placed in different ways within the shadow area and non-shadow area between two adjacent rows of photovoltaic assemblies, includes:

[0037] Determine, according to the calculation model, the total reflected irradiance gain of each position point on the surface of the reflector for the photovoltaic assembly when the reflector is placed at different angles at different positions in the shadow area and non-shadow area between two adjacent rows of photovoltaic assemblies;

[0038] Determining the placement of the reflector corresponding to the reflected irradiance gain that meets the preset conditions as the optimal placement of the reflector includes:

[0039] The placement angle and placement position of the reflector corresponding to the reflected irradiance gain that meets the preset conditions are determined as the optimal placement angle and optimal placement position of the reflector.

[0040] Optionally, the placement of the reflector is adjustable, and the photovoltaic system optimization method further includes:

[0041] The optimal placement mode of the reflector is determined in real time, and the placement mode of the reflector is adjusted to the optimal placement mode.

[0042] Optionally, the angle of the photovoltaic assembly is adjustable, and the photovoltaic system optimization method further includes:

[0043] The angle of the photovoltaic module is adjusted according to the placement of the reflector.

[0044] Optionally, determining, according to the calculation model, the reflected irradiance gain of the reflector for the photovoltaic assembly when the reflector is placed in different ways within the shadow area and non-shadow area between two adjacent rows of photovoltaic assemblies, includes:

[0045] Determine, according to the calculation model, the reflected irradiance gain of the reflector for the photovoltaic assembly at different angles of the photovoltaic assembly when the reflector is placed in different ways in the shadow area and non-shadow area between two adjacent rows of the photovoltaic assembly;

[0046] Determining the placement of the reflector corresponding to the reflected irradiance gain that meets the preset conditions as the optimal placement of the reflector includes:

[0047] The placement of the reflector and the angle of the photovoltaic module corresponding to the maximum total reflected irradiance gain are determined as the optimal placement of the reflector and the optimal angle of the photovoltaic module.

[0048] Optionally, when the scattering ratio of the photovoltaic system is greater than a preset scattering ratio, determining the optimal placement of the reflector in a shadow area between two adjacent rows of photovoltaic modules;

[0049] When the direct radiation ratio of the photovoltaic system is greater than a preset direct radiation ratio, determining the optimal placement of the reflector in the non-shadow area between two adjacent rows of photovoltaic modules;

[0050] When the difference between the scattering ratio and the direct ratio of the photovoltaic system is less than a preset difference, the optimal placement of the reflector is determined among different placement positions that satisfy the requirement that the reflector is partially located in the shadow area and partially located in the non-shadow area.

[0051] According to another aspect of the present invention, there is provided a photovoltaic system optimization device, the photovoltaic system comprising a plurality of rows of photovoltaic modules, a reflector is provided between two adjacent rows of photovoltaic modules, the photovoltaic system optimization device comprising:

[0052] A calculation model establishment module, used to establish a calculation model of the reflected irradiance gain of the reflector for the photovoltaic module based on the irradiance value received on the surface of the reflector;

[0053] A reflected irradiance gain determination module, used to determine, according to the calculation model, the reflected irradiance gain of the reflector for the photovoltaic assembly when the reflector is placed in different ways in the shadow area and non-shadow area between two adjacent rows of photovoltaic assemblies;

[0054] The optimal placement mode determination module is used to determine the placement mode of the reflector corresponding to the reflected irradiance gain that meets the preset conditions as the optimal placement mode of the reflector.

[0055] The photovoltaic system optimization method and device provided by the embodiments of the present invention establish a calculation model for the reflected radiation gain of the reflector for the photovoltaic assembly, and determine the reflected radiation gain of the reflector for the photovoltaic assembly when the reflector is placed in different ways in the shadow area and non-shadow area between two adjacent rows of photovoltaic assemblies according to the calculation model, and determine the placement of the reflector corresponding to the reflected radiation gain that meets the preset conditions as the optimal placement of the reflector, thereby achieving the determination of the optimal placement of the reflector in the shadow area and non-shadow area between two adjacent rows of photovoltaic assemblies, and determining the optimal placement of the reflector according to the reflected radiation gain of the reflector for the photovoltaic assembly, which helps to additionally utilize the light in the shadow area and non-shadow area of ​​the assembly to generate electricity, thereby improving the power generation of the photovoltaic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0057] Figure 1 is a schematic flow chart of a photovoltaic system optimization method provided by an embodiment of the present invention;

[0058] Figure 2 is a schematic diagram of a light path of a photovoltaic system provided by an embodiment of the present invention;

[0059] Figure 3 is a schematic structural diagram of a photovoltaic system provided by an embodiment of the present invention;

[0060] Figure 4 is a flow chart of another photovoltaic system optimization method provided by an embodiment of the present invention;

[0061] Figure 5 is a schematic diagram of a scattered light receiving area at any position on the ground provided by an embodiment of the present invention;

[0062] Figure 6 is a schematic diagram of an angle not blocked by a photovoltaic module provided by an embodiment of the present invention;

[0063] Figure 7 is a schematic diagram of a direct light receiving area provided by an embodiment of the present invention;

[0064] Figure 8 is a schematic diagram of a calculation model of reflected irradiance reception provided by an embodiment of the present invention;

[0065] Fig. 9is a schematic structural diagram of another photovoltaic system provided by an embodiment of the present invention;

[0066] Fig.10 is a schematic structural diagram of another photovoltaic system provided by an embodiment of the present invention;

[0067] Fig.11 is a schematic structural diagram of another photovoltaic system provided by an embodiment of the present invention;

[0068] Fig.12 is a schematic structural diagram of another photovoltaic system provided by an embodiment of the present invention;

[0069] Fig.13 It is a schematic diagram of the module structure of an optimization device for a photovoltaic system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0070] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 should fall within the scope of protection of the present invention.

[0071] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0072] As described in the background art, the open space between adjacent rows of photovoltaic modules in a photovoltaic system is usually large, so that the solar radiation in this space cannot be effectively utilized. In order to utilize the solar radiation in this space, the prior art generally sets a reflector between two adjacent rows of photovoltaic modules. However, there is currently no systematic method to determine where the reflector should be placed and how it should be placed.

[0073] In view of the above problems, an embodiment of the present invention provides a method for optimizing a photovoltaic system. Figure 1is a flow chart of a photovoltaic system optimization method provided by an embodiment of the present invention. This embodiment is applicable to the case of optimizing the placement of reflectors in a photovoltaic system. The method can be executed by an optimization device for a photovoltaic system. The device can be implemented in the form of hardware and / or software. The device can be configured in an electronic device. The photovoltaic system in the embodiment of the present invention includes multiple rows of photovoltaic modules, and reflectors are arranged between two adjacent rows of photovoltaic modules. Accordingly, see Figure 1 , the optimization method of the photovoltaic system specifically includes the following steps:

[0074] S110: Based on the irradiance value received by the surface of the reflector, a calculation model of the reflected irradiance gain of the reflector for the photovoltaic module is established.

[0075] The reflective surface refers to its reflective surface, and the reflected radiation gain of the reflective board for the photovoltaic module can be understood as the increase in the reflected radiation received by the photovoltaic module under the reflection effect of the reflective board.

[0076] Figure 2 Schematic diagram of the light path of the photovoltaic system provided by an embodiment of the present invention. Figure 2 The side view structure of two rows of photovoltaic modules 100 in the photovoltaic system is schematically shown, and the reflector is not shown. Figure 2 , illustratively, the light received by the area between two adjacent rows of photovoltaic modules 100 includes direct light B1 and / or scattered light B2. The direct light B1 and / or scattered light B2 can generate reflected light B3 when irradiated to the ground. The reflected light B3 can irradiate to the photovoltaic module 100, thereby providing reflected irradiation for the photovoltaic module 100. It can be understood that when the light-emitting panel is placed between two adjacent rows of photovoltaic modules 100, and the surface of the reflector is set away from the ground, the surface of the reflector can receive the irradiation of direct light and / or scattered light, and reflect the light to the photovoltaic module 100, thereby providing reflected irradiation for the photovoltaic module 100, and the size of the reflected irradiation provided by the reflector to the photovoltaic module 100 is related to the irradiation value received by the surface of the reflector. Therefore, according to the irradiation value received by the surface of the reflector, a calculation model of the reflected irradiation gain of the reflector for the photovoltaic module can be established.

[0077] S120. Determine, according to a calculation model, the reflected irradiance gain of the reflector for the photovoltaic module when the reflector is placed in different ways in the shadow area and non-shadow area between two adjacent rows of photovoltaic modules.

[0078] Continue to see Figure 2 The area between two adjacent rows of photovoltaic modules 100 includes the shadow area A sh and non-shaded area A nsh , shaded area A sh It may be an area shaded by the shadow of the photovoltaic module 100, and the non-shadow area Ansh It can be an area not blocked by the shadow of the photovoltaic module 100. The reflector can be placed in the shadow area A between two adjacent rows of photovoltaic modules 100 in different ways. sh and non-shaded area A nsh The different placement methods of the reflector include different placement positions and different placement angles. For example, the reflector can be placed in the shadow area A between two adjacent rows of photovoltaic modules 100. sh and non-shaded area A nsh The reflector can also be placed at different angles in the shadow area A between two adjacent rows of photovoltaic modules 100. sh and non-shaded area A nsh within the range.

[0079] Figure 3 It is a structural schematic diagram of a photovoltaic system provided by an embodiment of the present invention. Figure 3 The side view structure of three rows of photovoltaic components 100 in the photovoltaic system and the reflector 200 located between two adjacent rows of photovoltaic components are schematically shown. Figure 3 The reflector 200 is placed in the non-shadow area between two adjacent rows of photovoltaic modules 100, and the reflector 200 is placed parallel to the ground. In practical applications, the reflector 200 can also be placed in the shadow area and non-shadow area between two adjacent rows of photovoltaic modules in other ways.

[0080] Exemplarily, according to the calculation model, when the reflector is placed in different ways in the shadow area and non-shadow area between two adjacent rows of photovoltaic modules, the reflected irradiance gain of the reflector corresponding to the different placement methods for the photovoltaic modules is calculated.

[0081] S130, determining the placement of the reflector corresponding to the reflected irradiance gain that meets the preset condition as the optimal placement of the reflector.

[0082] Specifically, a reflected irradiation gain that meets preset conditions is searched for among the reflected irradiation gains of the reflectors for the photovoltaic modules corresponding to different placement methods, wherein the reflected irradiation gain that meets the preset conditions can be pre-set according to specific needs. For example, the reflected irradiation gain that meets the preset conditions can be the maximum value among the reflected irradiation gains of the reflectors for the photovoltaic modules corresponding to different placement methods, so that the reflected irradiation provided by the reflectors for the photovoltaic modules is maximized in the optimal placement method.

[0083] The technical solution of the embodiment of the present invention establishes a calculation model for the reflected radiation gain of the reflector for the photovoltaic module, and determines the reflected radiation gain of the reflector for the photovoltaic module when the reflector is placed in different ways in the shadow area and non-shadow area between two adjacent rows of photovoltaic modules according to the calculation model, and determines the placement of the reflector corresponding to the reflected radiation gain that meets the preset conditions as the optimal placement of the reflector, thereby realizing the determination of the optimal placement of the reflector in the shadow area and non-shadow area between two adjacent rows of photovoltaic modules, and determining the optimal placement of the reflector according to the reflected radiation gain of the reflector for the photovoltaic module, which helps to additionally utilize the light in the shadow area and non-shadow area of ​​the module to generate electricity, thereby improving the power generation of the photovoltaic system.

[0084] Figure 4 is a flow chart of another photovoltaic system optimization method provided by an embodiment of the present invention. This embodiment further optimizes the above embodiment. On the basis of the above embodiment, optionally, the calculation model of the reflected irradiance gain of the reflector for the photovoltaic module is the calculation model of the reflected irradiance gain of the photovoltaic module at different positions on the reflector surface. Figure 4 , the optimization method of the photovoltaic system specifically includes the following steps:

[0085] S210, determining the irradiance value received by the position point on the surface of the reflector according to whether the position point on the surface of the reflector is in a shadow area or a non-shadow area between two adjacent rows of photovoltaic modules.

[0086] See also Figure 2 , shaded area A sh The light received in the non-shadow area is scattered light B2. nsh The light received is direct light B1 and scattered light B2. Therefore, the irradiance value received by the position point on the reflector surface can be determined according to whether the position point on the reflector surface is in the shadow area or non-shadow area between two adjacent rows of photovoltaic modules.

[0087] Optionally, when the position point on the surface of the reflector is in the shadow area between two adjacent rows of photovoltaic modules, the irradiation value received by the position point on the surface of the reflector is a scattered irradiation value; when the position point on the surface of the reflector is in the non-shadow area between two adjacent rows of photovoltaic modules, the irradiation value received by the position point on the surface of the reflector is a direct irradiation value and a scattered irradiation value.

[0088] For example, see Figure 2 , the position point on the reflector surface is in the shadow area A sh When the light received by the position point is scattered light B2, the irradiance value received by the position point is the scattered irradiance value. nshWhen , the light received by the position point is direct light B1 and scattered light B2, then the irradiance value received by the position point is the direct irradiance value and the scattered irradiance value.

[0089] Optionally, the scattered radiation value received by the position point on the reflector surface is the product of the plane scattered radiation value and the scattered reception coefficient of the position point on the reflector surface; the scattered reception coefficient is the ratio of the total angle of the position point on the reflector surface not blocked by the photovoltaic module to the plane angle.

[0090] Among them, the plane scattered irradiance value is the scattered irradiance value that the plane where the reflector surface is located can receive when there is no obstruction. For example, when the reflector surface is placed parallel to the ground, the plane scattered irradiance value can be the scattered irradiance value that the ground can receive when there is no obstruction. The plane scattered irradiance value can be obtained by measurement or calculation.

[0091] Figure 5 is a schematic diagram of a scattered light receiving area at any position on the ground provided by an embodiment of the present invention. Figure 5 , taking the reflector surface being placed parallel to the ground as an example, the reflector surface can be used as the horizontal axis of the coordinate, that is, the ground can be used as the horizontal axis of the coordinate, and different positions on the ground can be used to represent different positions on the reflector surface. Figure 5 The total angle of the point C on the surface of the reflector shown in FIG. 1 that is not blocked by the photovoltaic assembly 100 may be the sum of the angles of the regions D10 , D11 , and D12 .

[0092] The diffuse irradiance value DIF received by the position point on the reflector surface ground (loc) can be expressed as:

[0093]

[0094]

[0095] Among them, α loc is the total angle of the reflector surface point that is not blocked by the photovoltaic module, 180 degrees is the plane angle, DIF is the plane scattered irradiance value, α i is the angle corresponding to the i-th area where the position point on the reflector surface is not blocked by the photovoltaic module, and k is the total number of areas where the position point on the reflector surface is not blocked by the photovoltaic module.

[0096] Figure 6 is a schematic diagram of an angle not blocked by a photovoltaic module provided by an embodiment of the present invention. Figure 6 , the position point on the ground is still used to represent the position point on the reflector surface, then the angle α corresponding to the i-th area of ​​the position point on the reflector surface that is not blocked by the photovoltaic module is i It can be expressed as:

[0097]

[0098] Among them, l 1 is the length of the line between the position point on the reflector surface and the vertex of the photovoltaic module 100 on one side, l 2 is the length of the line between the position point on the reflector surface and the vertex of the photovoltaic module 100 on the other side, l 3 is the length of the line connecting the vertices of the photovoltaic modules 100 on both sides of the reflector. According to formula (3), the angle corresponding to any area of ​​the reflector surface that is not blocked by the photovoltaic module can be calculated.

[0099] According to formulas (1) to (3), the scattering reception coefficient k can be calculated loc =α loc / 180, then the diffuse irradiance value DIF received by the position point on the reflector surface ground (loc) can also be expressed as:

[0100] DIF ground (loc) = k loc *DIF; (4)

[0101] Optionally, the direct radiation value received by the position point on the reflector surface is the product of the standard direct radiation value and the direct radiation reception coefficient of the position point on the reflector surface; when the position point on the reflector surface is in the shadow area, the direct radiation reception coefficient is 0, and when the position point on the reflector surface is in the non-shadow area, the direct radiation reception coefficient is 1.

[0102] The standard direct irradiance value is the direct irradiance value that a point on the reflector surface can receive without any shielding. The direct irradiance value can be obtained by measurement or calculation. ground (loc) can be expressed as:

[0103] DNI ground (loc) = η loc *DNI; (5)

[0104] Where DNI is the standard direct irradiance value, η loc is the direct reception coefficient.

[0105] Figure 7 Schematic diagram of a direct light receiving area provided by an embodiment of the present invention. Figure 7 , area D20, area D21 and area D22 represent the direct light receiving area, that is, the non-shadow area between two adjacent rows of photovoltaic modules 100. Therefore, when the position point on the reflector surface is in the shadow area, the direct light receiving coefficient η locWhen the position point on the reflector surface is in the non-shadow area, the direct reception coefficient η loc is 1.

[0106] S220, determining the reflected irradiance received by the photovoltaic assembly at a position point on the surface of the reflector.

[0107] Specifically, the reflected irradiance reception can indicate the amount of irradiance reflected by the reflector to the photovoltaic module, and what proportion can be received by the photovoltaic module. The reflected irradiance reception can also be called the visibility coefficient or viewing angle coefficient.

[0108] Figure 8 is a schematic diagram of a calculation model for reflected irradiance reception provided by an embodiment of the present invention. Figure 8 , A1 represents the surface of the reflector, A2 represents the surface of the photovoltaic module, A2 can be the front or back of the module, the x-axis and y-axis are the coordinate axes of the reflector surface A1, the ξ-axis and η-axis are the coordinate axes of the photovoltaic module surface A2, θ 1 is the angle between the line from the position point on the surface A1 of the reflector to the surface A2 of the photovoltaic module and the normal line n1 on the surface A1 of the reflector, θ 2 is the angle between the line connecting the position point on the surface A1 of the reflector to the surface A2 of the photovoltaic module and the normal line n2 of the surface A2 of the photovoltaic module, and S is the length of the line connecting the position point on the surface A1 of the reflector to the surface A2 of the photovoltaic module. The reflected irradiance receiving degree F of the photovoltaic module for the position point on the surface of the reflector A1-A2 It can be expressed as:

[0109]

[0110] S230, establishing a calculation model for reflected radiation gain according to the radiation value received by the position point on the surface of the reflector, the reflectivity of the reflector, the reflected radiation receiving degree and the length of the photovoltaic module.

[0111] Exemplarily, the reflected irradiance gain of different positions on the reflector surface for the photovoltaic module can be the ratio of the product of the irradiance value received by the position point on the reflector surface, the reflectivity of the reflector, the reflected irradiance receiving degree of the light-receiving surface of the photovoltaic module for the position point on the reflector surface, and the length of the photovoltaic module. The irradiance value received by the position point on the reflector surface includes the direct irradiance value and the diffuse irradiance value. When the position point is in the shadow area, the direct irradiance value is 0. The length of the photovoltaic module can be the length perpendicular to the arrangement direction of a row of photovoltaic modules (such as Figure 2 Length L shown).

[0112] Optionally, the photovoltaic module includes a bifacial module, and the calculation model includes the sum of the reflected irradiance gain of the position point on the surface of the reflector for the front side of the module and the reflected irradiance gain of the back side of the module;

[0113] The reflected radiation gain on the front of the module includes the sum of the direct radiation value and the scattered radiation value received by the position point on the reflector surface, the reflectivity of the reflector, and the ratio of the product of the reflected radiation receiving degree of the position point on the front of the module to the reflector surface to the length of the photovoltaic module;

[0114] The reflected radiation gain on the back of the module includes the sum of the direct radiation value and the scattered radiation value received by the position point on the reflector surface, the reflectivity of the reflector, the reflected radiation acceptance degree of the position point on the back of the module for the reflector surface, and the ratio of the product of the bifacial factor of the photovoltaic module and the length of the photovoltaic module.

[0115] For example, the reflected irradiance gain I of the position point on the reflector surface for the front side of the component is r1 (loc) can be expressed as:

[0116] I r1 (loc)=((k loc *DIF+η loc *DNI)*ρ*F f-A1-A2-i ) / L; (7)

[0117] The reflected irradiance gain I of the position point on the reflector surface for the back of the component r2 (loc) can be expressed as:

[0118] I r2 (loc)=((k loc *DIF+η loc *DNI)*ρ*F B-A1-A2-i *Bifi_factor) / L; (8)

[0119] Reflection irradiance gain I of bifacial photovoltaic modules at different positions on the reflector surface r The calculation model of (loc) can be expressed as:

[0120] I r (loc)=I r1 (loc)+I r2 (loc); (9)

[0121] Where ρ is the reflectivity of the reflector, F f-A1-A2-i is the reflected irradiance received by the position point on the front of the module relative to the reflector surface, L is the length of the photovoltaic module, F B-A1-A2-i is the reflected irradiance received by the back of the module at the position point on the reflector surface, and Bifi_factor is the bifacial factor of the photovoltaic module.

[0122] It should be noted that the above embodiments are only schematically illustrated by taking the photovoltaic module being a double-sided module as an example. In actual applications, the photovoltaic module may also be a single-sided module. When the photovoltaic module is a single-sided module, the reflected radiation gain of the photovoltaic module at different positions on the surface of the reflector is only the reflected radiation gain of the front side of the module, which can be calculated with reference to formula (7).

[0123] S240. Determine, according to a calculation model, the reflected irradiance gain of the reflector for the photovoltaic module when the reflector is placed in different ways in the shadow area and the non-shadow area between two adjacent rows of photovoltaic modules.

[0124] S250: Determine the placement of the reflector corresponding to the reflected irradiance gain that meets the preset condition as the optimal placement of the reflector.

[0125] The technical solution of the embodiment of the present invention determines the irradiance value received by the position point on the surface of the reflector according to whether the position point on the surface of the reflector is in the shadow area or non-shadow area between two adjacent rows of photovoltaic modules. When the position point on the surface of the reflector is in the shadow area, the scattered irradiance value received by the reflector can be taken into account, and a calculation model of reflected irradiation gain is established accordingly. When the optimal placement of the reflector is determined according to the calculation model, the reflected irradiation of the photovoltaic module when the reflector is in the shadow area and the non-shadow area is taken into account, which helps to additionally utilize the light within the shadow area and the non-shadow area of ​​the module to generate electricity, thereby improving the power generation of the photovoltaic system.

[0126] In one embodiment, optionally, step S240 includes: determining, according to the calculation model, the total reflected irradiance gain of each position point on the surface of the reflector for the photovoltaic assembly when the reflector is placed at different positions in the shadow area and the non-shadow area between two adjacent rows of photovoltaic assemblies. Accordingly, step S250 includes: determining the placement position of the reflector corresponding to the maximum total reflected irradiance gain as the optimal placement position of the reflector.

[0127] Specifically, different placement methods of the reflector include different placement positions. When the reflector is placed at any position in the shadow area and non-shadow area between two adjacent rows of photovoltaic modules, the total reflected radiation gain of each position point on the reflector surface for the photovoltaic module can be calculated when the reflector is placed at this position. The total reflected radiation gain refers to the sum of the reflected radiation gain of all position points on the reflector surface for the photovoltaic module. The maximum total reflected radiation gain refers to the maximum value of the total reflected radiation gain corresponding to different placement positions of the reflector.

[0128] Exemplarily, the optimal placement position of the reflector can be determined by the sliding window method based on the size of the reflector, the distance between two adjacent rows of photovoltaic modules and the calculation model of the reflected irradiance gain of the photovoltaic modules at different positions on the reflector surface. Fig. 9is a schematic diagram of the structure of another photovoltaic system provided by an embodiment of the present invention. Fig. 9 , the length of the reflector 200 is E1, the distance between two adjacent rows of photovoltaic modules is E2, the reflector 200 is placed parallel to the ground, and the reflective surface of the reflector 200 is set away from the ground as an example for explanation. The plane where the ground and the reflector 200 are located is the x-axis, the interval [0, E2] is the area between two adjacent rows of photovoltaic modules, and the interval [0, E2] includes a shadow area and a non-shadow area. According to the calculation model of the reflected irradiation gain, for example, according to formulas (7) to (9), the total reflected irradiation gain corresponding to the reflector 200 sliding to different positions between the interval [0, E2] and sliding along the x-axis with a set step length can be calculated. The total reflected irradiation gain can be the sum of the reflected irradiation gain of all positions of the reflector 200 on the x-axis for the photovoltaic modules. Then, the interval [loc1, loc1+E1] corresponding to the maximum total reflected irradiation gain is determined, which is the optimal placement position of the reflector 200. Wherein, loc1 is the left vertex position of the reflector 200, and loc1+E1 is the right vertex position of the reflector 200. The size of the set step length for the reflector 200 to slide can be set according to the length E1 of the reflector 200 and the distance E2 between two adjacent rows of photovoltaic modules.

[0129] In another embodiment, optionally, step S240 may also include: determining, based on a calculation model, the total reflected irradiance gain of each position point on the surface of the reflector for the photovoltaic assembly when the reflector is placed at different angles in the shadow area and non-shadow area between two adjacent rows of photovoltaic assemblies.

[0130] Specifically, different placement methods of the reflector include different placement angles. When the reflector is placed at any angle within the shadow area and non-shadow area between two adjacent rows of photovoltaic modules, the total reflected radiation gain of each position point on the reflector surface to the photovoltaic module can be calculated when the reflector is placed at this angle. The total reflected radiation gain refers to the sum of the reflected radiation gains of all position points on the reflector surface to the photovoltaic module.

[0131] Fig.10 It is a schematic diagram of the structure of another photovoltaic system provided by an embodiment of the present invention. Fig.10 The schematic diagram shows that the reflector 200 is placed between two adjacent rows of photovoltaic modules 100, and the reflector 200 has an inclination angle relative to the ground. Fig.10When the reflector 200 is placed between two adjacent rows of photovoltaic modules at different angles, the reflected irradiance of the reflector 200 to the photovoltaic modules 100 is different. Therefore, the total reflected irradiance gain of each position point on the surface of the reflector 200 to the photovoltaic modules can be calculated according to the calculation model when the reflector 200 is placed between two adjacent rows of photovoltaic modules 100 at different angles in the shadow area and non-shadow area.

[0132] Exemplarily, when the reflector 200 has an inclination angle relative to the ground, the scheme of steps S210 to S230 in the above embodiment can still be referred to, and the irradiance value received by the position point on the surface of the reflector 200 is determined according to whether the position point on the surface of the reflector 200 is in the shadow area or non-shadow area between two adjacent rows of photovoltaic modules 100, and the reflected irradiance acceptance degree of the photovoltaic module 100 for the position point on the surface of the reflector 200 is determined, thereby establishing a calculation model for the reflected irradiance gain according to the irradiance value received by the position point on the surface of the reflector 200, the reflectivity of the reflector, the reflected irradiance acceptance degree and the length of the photovoltaic module 100. The difference between this embodiment and the above embodiments is that, in the above embodiments, the reflector 200 is placed parallel to the ground, and different position points on the ground are used to represent the position points of the reflector 200, so as to calculate the direct radiation value and the scattered radiation value received by the position points on the surface of the reflector 200, while in this embodiment, the reflector 200 has an inclination angle relative to the ground, and the corresponding direct radiation value and the scattered radiation value should be calculated directly according to the position points on the surface of the reflector 200, or the plane where the reflector 200 is located can be used as the horizontal axis of the coordinate, and different position points on the horizontal axis of the coordinate can be used to represent the position points of the reflector 200, so as to calculate the corresponding direct radiation value and the scattered radiation value.

[0133] After calculating the total reflected irradiance gain of the photovoltaic module at each point on the surface of the reflector corresponding to different placement angles of the reflector, the reflected irradiance gain that meets the preset conditions can be determined based on the total reflected irradiance gain, so that the placement method of the reflector corresponding to the reflected irradiance gain that meets the preset conditions can be determined as the optimal placement method of the reflector.

[0134] Continue to see Fig.10, the ground area between the reflector 200 and an adjacent row of photovoltaic modules 100 is the first area D1, and the ground area between the reflector 200 and another adjacent row of photovoltaic modules 100 is the second area D2; on the basis of the above embodiments, optionally, the optimization method of the photovoltaic system also includes: calculating the reflected irradiation gains of the first area and the second area for the photovoltaic modules when the reflector 200 is placed at different angles in the shadow area and the non-shadow area between two adjacent rows of photovoltaic modules 100; accordingly, step S250 specifically includes: the sum of the reflected irradiation gains of the first area, the second area and the reflector for the photovoltaic modules is the target reflected irradiation gain, and the placement angle of the reflector corresponding to the maximum target reflected irradiation gain is determined as the optimal placement angle of the reflector.

[0135] Specifically, when the reflector 200 is placed at different angles relative to the ground, the light received by the first area D1 and the second area D2 is also different, so that the reflector 200, the first area D1 and the second area D2 can generate different degrees of reflected irradiation for the photovoltaic module 100. Therefore, when the reflector 200 is placed at different angles in the shadow area and the non-shadow area between two adjacent rows of photovoltaic modules 100, the total reflected irradiation gain of each position point on the surface of the reflector 200 for the photovoltaic module, the reflected irradiation gain of the first area D1 for the photovoltaic module 100, and the reflected irradiation gain of the second area D2 for the photovoltaic module 100 can be calculated, and the sum of the reflected irradiation gains of the first area D1, the second area D2 and the reflector 200 for the photovoltaic module corresponding to different placement angles of the reflector 200 is calculated, that is, the target reflected irradiation gain. The target reflected irradiation gain is traversed and optimized among the target reflected irradiation gains corresponding to different placement angles of the reflector 200, so as to determine the maximum value among the target reflected irradiation gains corresponding to different placement angles of the reflector 200, that is, the maximum target reflected irradiation gain, and the placement angle of the reflector 200 corresponding to the maximum target reflected irradiation gain is determined as the optimal placement angle of the reflector 200, so that at the optimal placement angle of the reflector 200, the first area D1, the second area D2 and the reflector 200 provide the maximum reflected irradiation for the photovoltaic module.

[0136] Among them, the calculation principle of the reflected irradiance gain of the photovoltaic component 100 for the first area D1 and the second area D2 is similar to the calculation principle of the reflected irradiance gain of the photovoltaic component 100 for different positions on the surface of the reflector 200 when the reflector 200 is placed parallel to the ground. By way of example, the schemes of steps S210 to S230 in the above-mentioned embodiments can be referred to, and the irradiance value received by the position point on the ground and the reflected irradiance acceptance degree of the photovoltaic component 100 for the position point on the ground can be determined according to whether the position point on the ground is in the shadow area or the non-shadow area between two adjacent rows of photovoltaic components 100. Thus, according to the irradiance value received by the position point on the ground, the reflectivity of the ground, the reflected irradiance acceptance degree and the length of the photovoltaic component 100, a calculation model of the reflected irradiance gain of the ground for the photovoltaic component 100 is established, and the reflected irradiance gain of the first area D1 and the second area D2 for the photovoltaic component 100 is determined according to the calculation model.

[0137] Based on the above embodiment, optionally, the photovoltaic system optimization method further includes:

[0138] According to the calculation model, the total reflected irradiance gain of each position point on the reflector surface for the photovoltaic module is determined when the reflector is placed at different positions in the shadow area and non-shadow area between two adjacent rows of photovoltaic modules at an optimal placement angle;

[0139] The placement position of the reflector corresponding to the maximum total reflected irradiance gain is determined as the optimal placement position of the reflector.

[0140] Exemplarily, after determining the optimal placement angle of the reflector, the reflector is placed between two adjacent rows of photovoltaic modules at the optimal placement angle, and the optimal placement position of the reflector is determined by the sliding window method based on the size of the reflector, the distance between two adjacent rows of photovoltaic modules, and the calculation model of the reflected irradiance gain of the photovoltaic modules at different positions on the surface of the reflector. For example, when calculating the total reflected irradiance gain of the photovoltaic modules at each position on the surface of the reflector corresponding to the different positions of the reflector when the reflector slides between two adjacent rows of photovoltaic modules, the placement position of the reflector corresponding to the maximum total reflected irradiance gain is determined as the optimal placement position of the reflector. The technical solution of the embodiment of the present invention can further determine the optimal placement position of the reflector after determining the optimal placement angle of the reflector, which helps to effectively utilize the light in the shadow area and non-shadow area of ​​the module to generate electricity, thereby increasing the power generation of the photovoltaic system.

[0141] In another embodiment, optionally, step S240 may also include: determining, based on a calculation model, the total reflected irradiance gain of each position point on the surface of the reflector for the photovoltaic assembly when the reflector is placed at different angles at different positions in the shadow area and non-shadow area between two adjacent rows of photovoltaic assemblies; accordingly, step S250 specifically includes: determining the placement angle and placement position of the reflector corresponding to the reflected irradiance gain that meets preset conditions as the optimal placement angle and optimal placement position of the reflector.

[0142] For example, referring to the schemes in the above-mentioned embodiments, the total reflected irradiance gain of each position point on the surface of the reflector for the photovoltaic assembly can be calculated according to the calculation model when the reflector is placed at different angles at different positions in the shadow area and non-shadow area between two adjacent rows of photovoltaic assemblies, and the placement angle and placement position of the reflector corresponding to the maximum total reflected irradiance gain are determined as the optimal placement angle and optimal placement position of the reflector. Alternatively, the sum of the reflected irradiance gains of the first area, the second area and the reflector for the photovoltaic assembly, that is, the target reflected irradiance gain, can be calculated according to the calculation model when the reflector is placed at different angles at different positions in the shadow area and non-shadow area between two adjacent rows of photovoltaic assemblies, and the placement angle and placement position of the reflector corresponding to the maximum target reflected irradiance gain are determined as the optimal placement angle and optimal placement position of the reflector.

[0143] In another embodiment, optionally, step S240 may also include: determining, according to a calculation model, the reflected irradiance gain of the reflector for the photovoltaic assembly at different angles of the photovoltaic assembly when the reflector is placed in different ways in the shadow area and non-shadow area between two adjacent rows of photovoltaic assemblies; accordingly, step S250 specifically includes: determining the placement of the reflector and the angle of the photovoltaic assembly corresponding to the maximum total reflected irradiance gain as the optimal placement of the reflector and the optimal angle of the photovoltaic assembly.

[0144] Specifically, according to the calculation model, the reflected irradiance gain of the reflector for photovoltaic modules at different angles is calculated when the reflector is placed in different ways in the shadow area and non-shadow area between two adjacent rows of photovoltaic modules, and the placement of the reflector and the angle of the photovoltaic module corresponding to the maximum total reflected irradiance gain are determined, so as to determine the optimal angle of the photovoltaic module while determining the optimal placement of the reflector. This helps to increase the reflected irradiation provided by the reflector to the photovoltaic module, thereby improving the power generation of the photovoltaic system.

[0145] Based on the above embodiments, optionally, the placement of the reflector is adjustable; accordingly, the optimization method of the photovoltaic system also includes: determining the optimal placement of the reflector in real time, and adjusting the placement of the reflector to the optimal placement.

[0146] Specifically, the placement of the reflector is adjustable, and the placement angle and placement position of the reflector can be adjustable. The optimal placement of the reflector includes the optimal placement angle and the optimal placement position. Since the distribution of the shadow area and the non-shadow area between two adjacent rows of photovoltaic modules is different in different time ranges, the light received by the reflector surface is different, and the magnitude of the reflected radiation provided by the reflector to the photovoltaic module is also different, therefore, the optimal placement angle and the optimal placement position of the reflector can be determined in real time according to the scheme in the above embodiment, and the placement angle and the placement position of the reflector can be adjusted accordingly, so that the placement angle of the reflector is the optimal placement angle, and the placement position is the optimal placement position, which helps to increase the reflected radiation provided by the reflector to the photovoltaic module, thereby improving the power generation of the photovoltaic system.

[0147] On the basis of the above-mentioned embodiments, optionally, the angle of the photovoltaic module is adjustable, and accordingly, the optimization method of the photovoltaic system further includes: adjusting the angle of the photovoltaic module according to the placement of the reflector. Specifically, this scheme can be applied to an adjustable photovoltaic system or an automatic tracking photovoltaic system, the angle of the photovoltaic module in the adjustable photovoltaic system is adjustable, and the angle of the photovoltaic module in the automatic tracking photovoltaic system can be automatically adjusted according to the angle of the incident light. After the reflector is placed at the optimal placement angle and / or the optimal placement position, the angle of the photovoltaic module can also be adjusted according to the placement of the reflector, so that the front and / or back of the module receive more radiation, thereby increasing the power generation of the photovoltaic system.

[0148] On the basis of the above embodiments, optionally, within a preset time range, when the reflector is placed in different ways in the shadow area and non-shadow area between two adjacent rows of photovoltaic modules, the reflected irradiation gain of the reflector to the photovoltaic module is determined according to the calculation model, and the placement of the reflector corresponding to the reflected irradiation gain that meets the preset conditions is determined as the optimal placement of the reflector. The preset time range can be selected according to demand, for example, the preset time range can be one hour, one day, one quarter or one year. Since the size of the preset time range is related to the size of the reflected irradiation of the reflector to the photovoltaic module, setting the size of the preset time range helps to improve the accuracy of the optimal placement of the reflector, thereby improving the power generation of the photovoltaic system.

[0149] On the basis of the above embodiments, optionally, when the scattering ratio of the photovoltaic system is greater than the preset scattering ratio, the optimal placement of the reflector is determined in the shadow area between two adjacent rows of photovoltaic modules; when the direct ratio of the photovoltaic system is greater than the preset direct ratio, the optimal placement of the reflector is determined in the non-shadow area between two adjacent rows of photovoltaic modules; when the difference between the scattering ratio and the direct ratio of the photovoltaic system is less than the preset difference, the optimal placement of the reflector is determined in different placement positions that satisfy the reflector being partially located in the shadow area and partially located in the non-shadow area. The size of the preset difference can be set according to demand.

[0150] Specifically, when the scattering ratio of the photovoltaic system is greater than the preset scattering ratio, there is more scattered light in the shadow area between two adjacent rows of photovoltaic modules. By determining the optimal placement of the reflector in the shadow area, the reflector can reflect the scattered light in the shadow area to the photovoltaic module, thereby using the scattered light in the shadow area to generate electricity, which helps to increase the power generation of the photovoltaic system. When the direct ratio of the photovoltaic system is greater than the preset direct ratio, there is more direct light in the non-shadow area between two adjacent rows of photovoltaic modules. By determining the optimal placement of the reflector in the non-shadow area, the reflector can reflect the direct light in the non-shadow area to the photovoltaic module, thereby using the direct light in the non-shadow area to generate electricity, which helps to increase the power generation of the photovoltaic system. When the difference between the scattering ratio and the direct ratio of the photovoltaic system is less than the preset difference, it means that the current scattering ratio and the direct ratio of the photovoltaic system are close. The optimal placement method of the reflector is determined in different placement positions that satisfy the reflector being partially located in the shadow area and partially located in the non-shadow area. The reflector can reflect both the scattered light in the shadow area and the direct light in the non-shadow area to the photovoltaic module, thereby utilizing the scattered light in the shadow area and the direct light in the non-shadow area to generate electricity, which helps to increase the power generation of the photovoltaic system.

[0151] Fig.11 It is a schematic diagram of the structure of another photovoltaic system provided by an embodiment of the present invention. Fig.12 is a schematic diagram of the structure of another photovoltaic system provided by an embodiment of the present invention. Fig.11 and Fig.12 A reflector 200 may be disposed between two adjacent rows of photovoltaic modules 100 and connected to one side of the photovoltaic modules 100. The reflective surface of the reflector 200 may be disposed away from the ground. Fig.11 and Fig.12 The only difference is that the reflector 200 is placed at a different angle relative to the ground. In this case, the optimal placement angle of the reflector 200 can still be determined based on the solution in the above embodiment, so that the reflector 200 provides the maximum reflected irradiance for the photovoltaic module 100 at the optimal placement angle.

[0152] Fig.13Schematic diagram of the module structure of a photovoltaic system optimization device provided by an embodiment of the present invention. This embodiment can be applied to the case of optimizing the placement of reflectors in a photovoltaic system. The photovoltaic system optimization device provided by an embodiment of the present invention can execute the photovoltaic system optimization method provided by any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method. Fig.13 The device specifically includes a calculation model building module 310, a reflection irradiation gain determination module 320 and an optimal placement determination module 330, wherein:

[0153] The calculation model establishment module 310 is used to establish a calculation model of the reflected radiation gain of the reflector for the photovoltaic module based on the radiation value received by the surface of the reflector;

[0154] The reflected irradiance gain determination module 320 is used to determine, according to a calculation model, the reflected irradiance gain of the reflector for the photovoltaic assembly when the reflector is placed in different ways in the shadow area and the non-shadow area between two adjacent rows of photovoltaic assemblies;

[0155] The optimal placement mode determination module 330 is used to determine the placement mode of the reflector corresponding to the reflected irradiance gain that meets the preset conditions as the optimal placement mode of the reflector.

[0156] The photovoltaic system optimization device provided in the embodiment of the present invention can execute the photovoltaic system optimization method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method, which will not be described in detail.

[0157] The embodiment of the present invention further provides an electronic device, which can be used to implement the optimization method of the photovoltaic system in any of the above embodiments of the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices.

[0158] The electronic device includes at least one processor and a memory communicatively connected to the at least one processor; wherein the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the photovoltaic system optimization method in any of the above embodiments of the present invention.

[0159] An embodiment of the present invention further provides a computer-readable storage medium, which stores computer instructions. The computer instructions are used to enable a processor to implement the photovoltaic system optimization method in any of the above embodiments of the present invention when executed.

[0160] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0161] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A photovoltaic system optimization method, characterized in that: The photovoltaic system comprises a plurality of rows of photovoltaic modules, and a reflector is arranged between two adjacent rows of photovoltaic modules. The optimization method of the photovoltaic system comprises: Based on the irradiance value received by the surface of the reflector, a calculation model of the reflected irradiance gain of the reflector for the photovoltaic module is established; Determine, according to the calculation model, the reflected irradiance gain of the reflector for the photovoltaic assembly when the reflector is placed in different ways in the shadow area and the non-shadow area between two adjacent rows of the photovoltaic assembly; Determining the placement of the reflector corresponding to the reflected irradiance gain that meets the preset conditions as the optimal placement of the reflector; Wherein, the calculation model is a calculation model of the reflected irradiance gain of the photovoltaic module at different positions on the surface of the reflector; The step of establishing a calculation model of the reflected irradiance gain of the reflector for the photovoltaic module based on the irradiance value received on the surface of the reflector comprises: Determining the irradiance value received by the position point on the surface of the reflector according to whether the position point on the surface of the reflector is in a shadow area or a non-shadow area between two adjacent rows of photovoltaic modules; Determining the reflected irradiance received by the photovoltaic assembly at a position point on the surface of the reflector; A calculation model for the reflected radiation gain is established according to the radiation value received by the position point on the surface of the reflector, the reflectivity of the reflector, the reflected radiation reception and the length of the photovoltaic module.

2. The photovoltaic system optimization method according to claim 1, characterized in that: When the position point on the surface of the reflector is in the shadow area between two adjacent rows of photovoltaic modules, the irradiance value received by the position point on the surface of the reflector is the scattered irradiance value; When the position point on the surface of the reflector is in the non-shadow area between two adjacent rows of photovoltaic modules, the irradiance value received by the position point on the surface of the reflector is a direct irradiance value and a scattered irradiance value.

3. The photovoltaic system optimization method according to claim 2, characterized in that: The scattered radiation value received by the position point on the surface of the reflector is the product of the plane scattered radiation value and the scattered reception coefficient of the position point on the surface of the reflector; The scattered reception coefficient is the ratio of the total angle of the position point on the surface of the reflector that is not blocked by the photovoltaic component to the plane angle.

4. The photovoltaic system optimization method according to claim 2, characterized in that: The direct radiation value received by the position point on the surface of the reflector is the product of the standard direct radiation value and the direct radiation receiving coefficient of the position point on the surface of the reflector; When the position point on the surface of the reflector is in a shadow area, the direct light reception coefficient is 0, and when the position point on the surface of the reflector is in a non-shadow area, the direct light reception coefficient is 1.

5. The photovoltaic system optimization method according to claim 1, characterized in that: The photovoltaic module includes a bifacial module, and the calculation model includes the sum of the reflected radiation gain of the position point on the surface of the reflector for the front side of the module and the reflected radiation gain of the back side of the module; The reflected radiation gain of the front side of the module includes the sum of the direct radiation value and the scattered radiation value received by the position point on the surface of the reflector, the reflectivity of the reflector, and the ratio of the product of the reflected radiation receiving degree of the front side of the module for the position point on the surface of the reflector to the length of the photovoltaic module; The reflected radiation gain on the back of the component includes the sum of the direct radiation value and the scattered radiation value received by the position point on the surface of the reflector, the reflectivity of the reflector, the reflected radiation receptivity of the back of the component for the position point on the surface of the reflector, and the ratio of the product of the bifacial factor of the photovoltaic component and the length of the photovoltaic component.

6. The photovoltaic system optimization method according to claim 1, characterized in that: Determining, according to the calculation model, the reflected irradiance gain of the reflector for the photovoltaic assembly when the reflector is placed in different ways in the shadow area and the non-shadow area between two adjacent rows of the photovoltaic assembly, includes: Determine, according to the calculation model, the total reflected irradiance gain of each position point on the surface of the reflector for the photovoltaic assembly when the reflector is placed at different positions in the shadow area and non-shadow area between two adjacent rows of photovoltaic assemblies; Determining the placement of the reflector corresponding to the reflected irradiance gain that meets the preset conditions as the optimal placement of the reflector includes: The placement position of the reflector corresponding to the maximum total reflected irradiance gain is determined as the optimal placement position of the reflector.

7. The photovoltaic system optimization method according to claim 1, characterized in that: Determining, according to the calculation model, the reflected irradiance gain of the reflector for the photovoltaic assembly when the reflector is placed in different ways in the shadow area and the non-shadow area between two adjacent rows of the photovoltaic assembly, includes: According to the calculation model, the total reflected irradiance gain of each position point on the surface of the reflector for the photovoltaic assembly is determined when the reflector is placed at different angles in the shadow area and non-shadow area between two adjacent rows of photovoltaic assemblies.

8. The photovoltaic system optimization method according to claim 7, characterized in that: The ground area between the reflector and one adjacent row of photovoltaic modules is the first area, and the ground area between the reflector and another adjacent row of photovoltaic modules is the second area; The photovoltaic system optimization method further includes: Calculate the reflected irradiance gain of the first area and the second area for the photovoltaic modules when the reflector is placed at different angles in the shadow area and the non-shadow area between two adjacent rows of the photovoltaic modules; Determining the placement of the reflector corresponding to the reflected irradiance gain that meets the preset conditions as the optimal placement of the reflector includes: The sum of the reflected irradiation gains of the first area, the second area and the reflector for the photovoltaic component is the target reflected irradiation gain, and the placement angle of the reflector corresponding to the maximum target reflected irradiation gain is determined as the optimal placement angle of the reflector.

9. The photovoltaic system optimization method according to claim 8, characterized in that: Also includes: Determine, according to the calculation model, the total reflected irradiance gain of each position point on the surface of the reflector for the photovoltaic assembly when the reflector is placed at different positions in the shadow area and non-shadow area between two adjacent rows of photovoltaic assemblies at the optimal placement angle; The placement position of the reflector corresponding to the maximum total reflected irradiance gain is determined as the optimal placement position of the reflector.

10. The photovoltaic system optimization method according to claim 1, characterized in that: Determining, according to the calculation model, the reflected irradiance gain of the reflector for the photovoltaic assembly when the reflector is placed in different ways in the shadow area and the non-shadow area between two adjacent rows of the photovoltaic assembly, includes: Determine, according to the calculation model, the total reflected irradiance gain of each position point on the surface of the reflector for the photovoltaic assembly when the reflector is placed at different angles at different positions in the shadow area and non-shadow area between two adjacent rows of photovoltaic assemblies; Determining the placement of the reflector corresponding to the reflected irradiance gain that meets the preset conditions as the optimal placement of the reflector includes: The placement angle and placement position of the reflector corresponding to the reflected irradiance gain that meets the preset conditions are determined as the optimal placement angle and optimal placement position of the reflector.

11. The photovoltaic system optimization method according to claim 1, characterized in that: The placement of the reflector is adjustable, and the photovoltaic system optimization method further includes: The optimal placement mode of the reflector is determined in real time, and the placement mode of the reflector is adjusted to the optimal placement mode.

12. The photovoltaic system optimization method according to claim 1, characterized in that: The angle of the photovoltaic assembly is adjustable, and the photovoltaic system optimization method further includes: The angle of the photovoltaic module is adjusted according to the placement of the reflector.

13. The photovoltaic system optimization method according to claim 1, characterized in that: Determining, according to the calculation model, the reflected irradiance gain of the reflector for the photovoltaic assembly when the reflector is placed in different ways in the shadow area and the non-shadow area between two adjacent rows of the photovoltaic assembly, includes: Determine, according to the calculation model, the reflected irradiance gain of the reflector for the photovoltaic assembly at different angles of the photovoltaic assembly when the reflector is placed in different ways in the shadow area and non-shadow area between two adjacent rows of the photovoltaic assembly; Determining the placement of the reflector corresponding to the reflected irradiance gain that meets the preset conditions as the optimal placement of the reflector includes: The placement of the reflector and the angle of the photovoltaic module corresponding to the maximum total reflected irradiance gain are determined as the optimal placement of the reflector and the optimal angle of the photovoltaic module.

14. The photovoltaic system optimization method according to claim 1, characterized in that: When the scattering ratio of the photovoltaic system is greater than a preset scattering ratio, determining the optimal placement of the reflector in the shadow area between two adjacent rows of photovoltaic modules; When the direct radiation ratio of the photovoltaic system is greater than a preset direct radiation ratio, determining the optimal placement of the reflector in the non-shadow area between two adjacent rows of photovoltaic modules; When the difference between the scattering ratio and the direct ratio of the photovoltaic system is less than a preset difference, the optimal placement of the reflector is determined among different placement positions that satisfy the requirement that the reflector is partially located in the shadow area and partially located in the non-shadow area.

15. A photovoltaic system optimization device, characterized in that: The photovoltaic system comprises a plurality of rows of photovoltaic modules, and a reflector is arranged between two adjacent rows of photovoltaic modules. The optimization device of the photovoltaic system comprises: A calculation model establishment module, used to establish a calculation model of the reflected irradiance gain of the reflector for the photovoltaic module based on the irradiance value received on the surface of the reflector; A reflected irradiance gain determination module, used to determine, according to the calculation model, the reflected irradiance gain of the reflector for the photovoltaic assembly when the reflector is placed in different ways in the shadow area and non-shadow area between two adjacent rows of photovoltaic assemblies; An optimal placement mode determination module, used to determine the placement mode of the reflector corresponding to the reflected irradiance gain that meets a preset condition as the optimal placement mode of the reflector; Wherein, the calculation model is a calculation model of the reflected irradiance gain of the photovoltaic module at different positions on the surface of the reflector; The calculation model building module is further used to determine the irradiance value received by the position point on the surface of the reflector according to whether the position point on the surface of the reflector is in the shadow area or non-shadow area between two adjacent rows of photovoltaic modules; The calculation model building module is also used to determine the reflected irradiance receiving degree of the photovoltaic assembly for the position point on the surface of the reflector; The calculation model establishment module is also used to establish the calculation model of the reflected radiation gain according to the irradiance value received by the position point on the surface of the reflector, the reflectivity of the reflector, the reflected radiation reception and the length of the photovoltaic module.

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