Photovoltaic power generation system

Abstract

The photovoltaic power generation system comprises a plurality of rows of photovoltaic power generation units arranged at intervals and light condensation assemblies, each photovoltaic power generation unit comprises a photovoltaic assembly, each light condensation assembly is arranged between two adjacent rows of photovoltaic power generation units, each light condensation assembly comprises a base and a light condensation structure, one side of each base is provided with a mounting surface, and the mounting surface is provided with a light condensation structure. The mounting surface faces a photovoltaic module in the photovoltaic power generation unit located on one side of the base, and the light condensation structure is arranged on the mounting surface so as to reflect light incident to the light condensation structure to the photovoltaic module facing the mounting surface. According to the photovoltaic power generation system, the light condensation assemblies are arranged between the two adjacent rows of photovoltaic power generation units, the light rays incident to the light condensation structures can be reflected to the photovoltaic assemblies facing the mounting surfaces by means of the light condensation assemblies, the reflectivity of the light condensation structures is higher than that of the ground, the reflection angle of the light condensation structures can be flexibly adjusted, and the light condensation structures can be conveniently assembled and disassembled. The light utilization rate of the photovoltaic power generation system can be obviously improved, so that the power generation capacity and the power generation efficiency are improved.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic technology, and in particular to a photovoltaic power generation system. Background Art

[0002] Photovoltaic modules refer to power generation elements that convert solar energy into electrical energy. Among them, double-glass photovoltaic modules can generate electricity on both the front and back sides, which can significantly improve power generation efficiency and have certain advantages in use.

[0003] In some application scenarios of double-glass photovoltaic modules, due to the certain distance between the front and rear rows of modules, some light will be irradiated on the ground, reflected by the ground and irradiated to the back of the module. However, the reflectivity of the ground is not high, so some light is wasted. Especially in high-latitude areas, because the modules are installed at a large inclination angle and the distance between the front and rear rows is also large, the problem of light waste is more serious. Utility Model Content

[0004] Based on this, it is necessary to provide a photovoltaic power generation system to address the serious problem of light waste in the application scenarios of photovoltaic components.

[0005] An embodiment of the present application provides a photovoltaic power generation system, comprising: a plurality of rows of photovoltaic power generation units spaced apart from each other, the photovoltaic power generation units comprising photovoltaic modules; and a focusing module disposed between two adjacent rows of the photovoltaic power generation units, the focusing module comprising a base and a focusing structure, a mounting surface is provided on one side of the base, the mounting surface faces the photovoltaic power generation units located on one side of the base, and the focusing structure is disposed on the mounting surface to reflect light incident on the focusing structure to the photovoltaic modules facing the mounting surface.

[0006] In one embodiment, the base is connected to one of the two adjacent rows of photovoltaic power generation units, and the mounting surface faces the other of the two adjacent rows of photovoltaic power generation units.

[0007] In one of the embodiments, the photovoltaic power generation unit further includes a photovoltaic bracket, the photovoltaic assembly is arranged on the photovoltaic bracket, and a side of the base facing away from the mounting surface is detachably connected to the photovoltaic bracket.

[0008] In one of the embodiments, the light-focusing structure includes a light incident surface and a light emitting surface protruding from the mounting surface toward a side away from the base, the light incident surface and the light emitting surface are both inclined relative to the mounting surface, and the light incident surface and the light emitting surface intersect on a side away from the base.

[0009] In one of the embodiments, the light-focusing structure further includes a reference surface intersecting with the mounting surface, and from one side of the mounting surface to the other side opposite thereto, the angle between the light-incident surface and the reference surface first decreases and then increases.

[0010] In one of the embodiments, from one side of the mounting surface to the other side opposite thereto, the protruding dimensions of the light incident surface and the light emitting surface in the light focusing structure relative to the mounting surface first decrease and then increase.

[0011] In one of the embodiments, the reference plane is parallel to the horizontal plane, and the angle α between the light incident plane and the reference plane satisfies: α≥90°-0.5β; wherein β is the solar altitude angle at 15 o'clock on the winter solstice.

[0012] In one of the embodiments, the mounting surface is recessed toward the center of the base.

[0013] In one of the embodiments, a wear-resistant layer is provided on the installation surface, and the light-concentrating structure is provided on the surface of the wear-resistant layer; or a wear-resistant layer is provided on the installation surface at the gaps between the light-concentrating structures.

[0014] In one embodiment, the material of the wear-resistant layer includes polycarbonate.

[0015] The above-mentioned photovoltaic power generation system, by arranging a focusing component between two adjacent rows of photovoltaic power generation units, can reflect the light incident on the focusing structure to the photovoltaic component facing the installation surface with the help of the focusing component. The reflectivity of the focusing structure is higher than that of the ground, and its reflection angle can be flexibly adjusted, which can significantly improve the utilization rate of light by the photovoltaic power generation system, thereby improving its power generation capacity and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the overall structure and optical path of a photovoltaic power generation system provided in one embodiment of the present application when sunlight is incident at a first angle.

[0017] Figure 2 A schematic diagram of the overall structure and optical path of a photovoltaic power generation system provided in one embodiment of the present application when sunlight is incident at a second angle.

[0018] Figure 3 A schematic diagram of the overall structure of a focusing assembly in a photovoltaic power generation system provided in one embodiment of the present application.

[0019] Figure 4 A schematic diagram of the angular relationship between a light incident surface and a reference surface in a photovoltaic power generation system provided in one embodiment of the present application.

[0020] The reference numerals in the specific implementation manner are as follows:

[0021] 10: Photovoltaic power generation system;

[0022] 100: photovoltaic power generation unit, 110: photovoltaic module, 120: photovoltaic support;

[0023] 200: light focusing component, 210: base, 211: mounting surface, 220: light focusing structure, 221: light incident surface, 222: light emitting surface, 223: reference surface. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0025] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply 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 on the present application.

[0026] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0028] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0030] Solar cells have been increasingly used as green energy. Photovoltaic solar cells are devices that convert sunlight into electrical energy. They can generate carriers using the photovoltaic principle and then use electrodes to extract the carriers, thereby facilitating the effective use of electrical energy. In particular, both the front and back sides of double-glass photovoltaic modules can generate electricity, which can significantly improve power generation efficiency and has certain advantages in use.

[0031] In the related art, since there is a certain distance between the front and rear rows of multiple photovoltaic modules, a part of the light will be irradiated on the ground, reflected by the ground and irradiated to the back of the module. However, since the reflectivity of the ground is not high, some light is wasted. Especially in high-latitude areas, because the modules are installed at a large inclination angle and the distance between the front and rear rows is also large, the problem of light waste is more serious.

[0032] Figure 1The overall structure and optical path diagram of a photovoltaic power generation system 10 provided by an embodiment of the present application when sunlight is incident at a first angle are shown. Figure 2 The overall structure and optical path diagram of a photovoltaic power generation system 10 provided in one embodiment of the present application when sunlight is incident at a second angle are shown.

[0033] To at least partially address the above issues, see Figure 1 to Figure 2 The embodiment of the present application provides a photovoltaic power generation system 10, which includes a plurality of rows of photovoltaic power generation units 100 and a focusing assembly 200 spaced apart from each other. The photovoltaic power generation unit 100 includes a photovoltaic assembly 110. The focusing assembly 200 is disposed between two adjacent rows of photovoltaic power generation units 100. The focusing assembly 200 includes a base 210 and a focusing structure 220. A mounting surface 211 is provided on one side of the base 210. The mounting surface 211 faces the photovoltaic power generation unit 100 located on one side of the base 210. The focusing structure 220 is disposed on the mounting surface 211 to reflect light incident on the focusing structure 220 to the photovoltaic assembly 110 facing the mounting surface 211.

[0034] The photovoltaic power generation system 10 may include multiple rows of photovoltaic power generation units 100, the specific number of which is not limited and can be flexibly determined according to the actual application scenario. Figure 1 and Figure 2 Only two adjacent rows of photovoltaic power generation units 100 in one embodiment are shown, and more rows of photovoltaic power generation units 100 are not shown in the figure, but it does not mean that they do not exist. On this basis, each row of photovoltaic power generation units 100 can also include multiple photovoltaic modules 110 arranged side by side, and the specific number is not limited. The arrangement direction of the photovoltaic modules 110 in each row of photovoltaic power generation units 100 intersects with the arrangement direction of multiple rows of photovoltaic power generation units 100.

[0035] Two adjacent rows of photovoltaic power generation units 100 are spaced apart from each other, and a focusing assembly 200 is provided between them, wherein the base 210 is the basic structure of the focusing assembly 200, and is used to carry other parts or components in the focusing assembly 200. The specific structure, shape, size, etc. of the base 210 are not limited. A focusing structure 220 is provided on the mounting surface 211 on one side of the base 210, and the mounting surface 211 can be a plane or a curved surface. The focusing assembly 200 can be provided with one or more focusing structures 220 with a light reflecting function. The focusing structure 220 cooperates with the mounting surface 211 to gather the light incident on the focusing structure 220 and reflect it to the photovoltaic power generation unit 100 located on one side of the base 210, thereby improving the utilization rate of light by the photovoltaic power generation system 10.

[0036] The photovoltaic power generation system 10 of the embodiment of the present application, by setting a focusing component 200 between two adjacent rows of photovoltaic power generation units 100, can reflect the light incident on the focusing structure 220 to the photovoltaic component 110 facing the installation surface 211 with the help of the focusing component 200. The reflectivity of the focusing structure 220 is higher than that of the ground, and its reflection angle can be flexibly adjusted, which can significantly improve the utilization rate of light by the photovoltaic power generation system 10, thereby improving its power generation capacity and efficiency.

[0037] As described above, the focusing assembly 200 is disposed between two adjacent rows of photovoltaic power generation units 100. In order to improve the integrity of the photovoltaic power generation system 10, please continue to refer to Figure 1 and Figure 2 In some embodiments, optionally, the base 210 is connected to one of the two adjacent rows of photovoltaic power generation units 100, and the installation surface 211 faces the other of the two adjacent rows of photovoltaic power generation units 100. In this way, the base 210 of the focusing assembly 200 is correspondingly arranged with the photovoltaic power generation unit 100, and the two are connected to each other, which not only improves the integration of the photovoltaic power generation system 10 and facilitates the installation and setting of the photovoltaic power generation system 10, but also enables the photovoltaic power generation unit 100 to be installed and fixed with the help of its own fixing structure, and can also be further installed and fixed with the help of the base 210 of the focusing assembly 200, thereby increasing the installation surface 211 area of ​​the photovoltaic power generation unit 100 and enhancing its wind resistance.

[0038] On the basis of the above embodiment, optionally, the photovoltaic power generation unit 100 further includes a photovoltaic support 120, the photovoltaic assembly 110 is arranged on the photovoltaic support 120, and the side of the base 210 away from the mounting surface 211 is detachably connected to the photovoltaic support 120. The photovoltaic support 120 is fixed on the ground, and the photovoltaic assembly 110 is mounted on the photovoltaic support 120. The photovoltaic assembly 110 is tilted relative to the photovoltaic support 120 to receive more sunlight and thus increase the power generation. The photovoltaic support 120 can be a fixed support, or a hydraulic telescopic support, so as to adjust the tilt angle of each group of photovoltaic assemblies 110 and each group of photovoltaic power generation units 100. The base 210 of the focusing assembly 200 is detachably connected to the photovoltaic support 120, such as by threaded connection, etc., which increases the mounting surface 211 area of ​​the photovoltaic power generation unit 100 and enhances its wind resistance.

[0039] Figure 3 A schematic diagram of the overall structure of a focusing assembly 200 in a photovoltaic power generation system 10 provided in one embodiment of the present application is shown.

[0040] The focusing assembly 200 may be provided with one or more focusing structures 220 that reflect light. Figure 1 to Figure 2 Also see Figure 3In some embodiments, the light-concentrating structure 220 may include a light-entering surface 221 and a light-emitting surface 222 protruding from the mounting surface 211 toward a side away from the base 210. The light-entering surface 221 and the light-emitting surface 222 are both inclined relative to the mounting surface 211, and the light-entering surface 221 and the light-emitting surface 222 intersect at a side away from the base 210. In some embodiments, the light-concentrating structure 220 is a triangular prism or a multi-prism disposed on the mounting surface 211, such as Figure 1 As shown in FIG. 1 , when the sunlight between two adjacent rows of photovoltaic power generation units 100 is incident on the focusing assembly 200, it first passes through the light incident surface 221 of one of the focusing structures 220 and irradiates the mounting surface 211, and then is reflected by the mounting surface 211 and emitted from the light emitting surface 222 of the focusing structure 220, and is reflected to the photovoltaic power generation unit 100 facing the mounting surface 211, so that this part of the light is reused to generate electricity, or as shown in FIG. Figure 2 As shown, when the sunlight between two adjacent rows of photovoltaic power generation units 100 is incident on the focusing assembly 200, it first passes through the light incident surface 221 of one of the focusing structures 220 to illuminate the mounting surface 211, is reflected by the mounting surface 211, is emitted from the light emitting surface 222 of the focusing structure 220, and passes through the light incident surface 221 of another focusing structure 220 to illuminate the mounting surface 211 again, and after multiple reflections from the mounting surface 211, is emitted from the light emitting surface 222 of a certain focusing structure 220 and is reflected to the photovoltaic power generation unit 100 facing the mounting surface 211, so that this part of the light is reused to generate electricity.

[0041] The focusing assembly 200 may be provided with one or more focusing structures 220. Figure 3 In some embodiments, optionally, there are multiple light-concentrating structures 220, and the light-concentrating structure 220 further includes a reference surface 223 intersecting with the mounting surface 211. From one side of the mounting surface 211 to the other side opposite thereto, the angle between the light-incident surface 221 and the reference surface 223 first decreases and then increases. The reference surface 223 may be a plane at a preset angle to a certain specified plane of the base 210 of the light-concentrating assembly 200. Figure 3In the figure, the angle between the light incident surface 221 and the reference surface 223 in the focusing structure 220 located on the upper left side of the mounting surface 211 is relatively large, and along the extension direction of the mounting surface 211, the angle between the light incident surface 221 and the reference surface 223 in the focusing structure 220 gradually decreases, and the light incident surface 221 and the reference surface 223 in a certain focusing structure 220 located in the middle part of the mounting surface 211 are basically flush with the reference surface 223, that is, the angle between the two is about 0°, and along the extension direction of the mounting surface 211, the angle between the light incident surface 221 and the reference surface 223 in the focusing structure 220 gradually increases, and reaches a relatively large angle between the light incident surface 221 and the reference surface 223 in the focusing structure 220 located on the lower right side of the mounting surface 211. That is, in the focusing assembly 200, the angles between the light incident surface 221 and the reference surface 223 in the focusing structure 220 at different positions are different, and the specific degree is not limited and can be set within a relatively reasonable degree range according to the actual application scenario.

[0042] On the basis of the above embodiment, optionally, from one side of the mounting surface 211 to the other side opposite thereto, the protrusion size of the light incident surface 221 and the light emitting surface 222 in the light focusing structure 220 relative to the mounting surface 211 first decreases and then increases. Figure 3 In the figure, the protruding dimensions of the light entrance surface 221 and the light exit surface 222 in the light-focusing structure 220 located on the upper left side of the mounting surface 211 are relatively large relative to the mounting surface 211, and along the extension direction of the mounting surface 211, the protruding dimensions of the light entrance surface 221 and the light exit surface 222 in the light-focusing structure 220 relative to the mounting surface 211 gradually decrease; the light entrance surface 221 and the light exit surface 222 in a light-focusing structure 220 located in the middle part of the mounting surface 211 are basically flush with the mounting surface 211, and the protruding dimension is about 0; along the extension direction of the mounting surface 211, the protruding dimensions of the light entrance surface 221 and the light exit surface 222 in the light-focusing structure 220 relative to the mounting surface 211 gradually increase, and reach a relatively large protruding dimension of the light entrance surface 221 and the light exit surface 222 in the light-focusing structure 220 located on the lower right side of the mounting surface 211 relative to the mounting surface 211. That is, in the focusing assembly 200, the protruding sizes of the light incident surface 221 and the light emitting surface 222 in the focusing structure 220 at different positions relative to the mounting surface 211 are different, and the specific sizes are not limited and can be set within a relatively reasonable size range according to the actual application scenario.

[0043] Figure 4 A schematic diagram showing the angle relationship between the light incident surface 221 and the reference surface 223 in a photovoltaic power generation system 10 provided in an embodiment of the present application is shown.

[0044] As described above, the reference plane 223 may be a plane at a preset angle to a certain specified plane of the base 210 of the focusing assembly 200. Figure 3 Also see Figure 4 In some embodiments, optionally, the reference plane 223 is parallel to the horizontal plane, and the angle α between the incident plane 221 and the reference plane 223 satisfies: α≥90°-0.5β; wherein β is the solar altitude angle at 15:00 on the winter solstice. The solar altitude angle refers to the angle between the incident direction of sunlight at a certain location on the earth and the horizon. Professionally speaking, the solar altitude angle refers to the angle between the sunlight at a certain place and the surface section connecting the place with the center of the earth. When the solar altitude angle is 90°, the solar radiation intensity is the maximum, and when the solar altitude angle is smaller, that is, the greater the degree of the sun's oblique impact on the ground, the solar radiation intensity is smaller. In this way, the degree range of the angle α between the light incident surface 221 and the reference surface 223 is set according to the solar altitude angle β at 15:00 on the winter solstice in different regions. The structure of the focusing structure 220 in the focusing assembly 200 can be set according to different lighting conditions in different regions according to local conditions, so as to better utilize the focusing assembly 200 to reflect the light incident on the focusing structure 220 to the photovoltaic assembly 110 facing the installation surface 211, thereby significantly improving the utilization rate of light by the photovoltaic power generation system 10, thereby improving its power generation capacity and efficiency.

[0045] Please continue reading Figures 1 to 3 In some embodiments, the mounting surface 211 is optionally recessed toward the center of the base 210. That is, the mounting surface 211 is a concave surface on the base 210, which can make the mounting surface 211 have a focusing effect similar to a concave mirror, and cooperate with the focusing structure 220 in the focusing assembly 200 to achieve the function of focusing the sunlight irradiated on the focusing assembly 200, further improve the utilization rate of light by the photovoltaic power generation system 10, thereby improving its power generation capacity and efficiency.

[0046] In order to improve the durability of the focusing assembly 200, in some embodiments, optionally, a wear-resistant layer is provided on the mounting surface 211, and the focusing structure 220 is provided on the surface of the wear-resistant layer; or a wear-resistant layer is provided on the mounting surface 211 in the gap between the focusing structures 220. The mounting surface 211 coated with the wear-resistant layer is more wear-resistant and scratch-resistant, and thus is more suitable for use in desert areas, with better durability and longer service life. Exemplarily, the material of the wear-resistant layer includes polycarbonate. Polycarbonate (PC), also known as PC plastic, is a high molecular polymer containing carbonate groups in the molecular chain. According to the structure of the ester group, it can be divided into aliphatic, aromatic, aliphatic-aromatic and other types. It is colorless and transparent, heat-resistant, impact-resistant, flame-retardant BI grade, good impact resistance, high refractive index, good processing performance, and has good mechanical properties within normal use temperature.

[0047] To sum up, the photovoltaic power generation system 10 using the embodiment of the present application can reflect the light incident on the focusing structure 220 to the photovoltaic component 110 facing the mounting surface 211, which can significantly improve the utilization rate of light by the photovoltaic power generation system 10, thereby improving its power generation capacity and efficiency.

[0048] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A photovoltaic power generation system, characterized in that: include: A plurality of rows of photovoltaic power generation units spaced apart from each other, wherein the photovoltaic power generation units include photovoltaic modules; and A focusing component is arranged between two adjacent rows of photovoltaic power generation units, and the focusing component includes a base and a focusing structure. A mounting surface is provided on one side of the base, and the mounting surface faces the photovoltaic power generation unit located on one side of the base. The focusing structure is arranged on the mounting surface to reflect light incident on the focusing structure to the photovoltaic component facing the mounting surface.

2. The photovoltaic power generation system according to claim 1, characterized in that: The base is connected to one of the two adjacent rows of photovoltaic power generation units, and the mounting surface faces the other of the two adjacent rows of photovoltaic power generation units.

3. The photovoltaic power generation system according to claim 2, characterized in that: The photovoltaic power generation unit further comprises a photovoltaic bracket, the photovoltaic assembly is arranged on the photovoltaic bracket, and a side of the base facing away from the mounting surface is detachably connected to the photovoltaic bracket.

4. The photovoltaic power generation system according to claim 1, characterized in that: The focusing structure includes a light incident surface and a light emitting surface protruding from the mounting surface toward a side away from the base, the light incident surface and the light emitting surface are both inclined relative to the mounting surface, and the light incident surface and the light emitting surface intersect at a side away from the base.

5. The photovoltaic power generation system according to claim 4, characterized in that: The light-concentrating structure further includes a reference surface intersecting with the mounting surface, and from one side of the mounting surface to the other side opposite thereto, the angle between the light-incident surface and the reference surface first decreases and then increases.

6. The photovoltaic power generation system according to claim 5, characterized in that: The reference plane is parallel to the horizontal plane, and the angle α between the light incident plane and the reference plane satisfies: α≥90°-0.5β； Among them, β is the solar altitude angle at 15:00 on the winter solstice.

7. The photovoltaic power generation system according to claim 4, characterized in that: From one side of the mounting surface to the other side opposite thereto, the protruding dimensions of the light incident surface and the light emitting surface in the light focusing structure relative to the mounting surface first decrease and then increase.

8. The photovoltaic power generation system according to claim 1, characterized in that: The mounting surface is recessed toward the center of the base.

9. The photovoltaic power generation system according to claim 1, characterized in that: The mounting surface is provided with a wear-resistant layer, and the focusing structure is provided on the surface of the wear-resistant layer; or A wear-resistant layer is provided on the mounting surface at the gaps between the light-focusing structures.

10. The photovoltaic power generation system according to claim 9, characterized in that: The material of the wear-resistant layer includes polycarbonate.

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