Photovoltaic desertification control system and ecological photovoltaic power station

Abstract

The utility model discloses a photovoltaic desertification control system and an ecological photovoltaic power station, and relates to the technical field of photovoltaic desertification control. The photovoltaic desertification control system comprises a photovoltaic module and a supporting frame, wherein the supporting frame supports the photovoltaic module; and the reflective film is attached to the ground and laid below the photovoltaic module. A reflective film is laid on the ground below the photovoltaic module, and the reflective film forms a sand barrier for sand and dust below the reflective film. Meanwhile, the reflective film has the effect of reflecting light and can reflect a part of sunlight to the back surface of the photovoltaic module, so that the generating capacity of the photovoltaic module is further increased, and the economic benefit is further improved. The cost of the reflective film is low, the service life of the reflective film generally exceeds 15 years, frequent updating and maintenance are not needed, and therefore the investment cost and the maintenance cost of the photovoltaic desertification control system can be reduced by adopting the reflective film as the sand barrier.

Description

Technical Field

[0001] This application relates to the technical field of photovoltaic desert control, and particularly to a photovoltaic desert control system and an ecological photovoltaic power station. Background Art

[0002] Due to its unique geographical and resource conditions in the northwest region of China, the installed capacity of photovoltaic power stations has increased rapidly in recent years. The northwest region is mainly Class I and Class II areas for solar energy resources, with an annual sunshine duration of not less than 2,200 hours, having good resource conditions for using solar energy; due to the special ecological natural environment in the northwest region, the areas of deserts, gobi, etc. are relatively large, and due to the special land occupation of photovoltaic power stations, the large-scale desert and gobi land in the northwest region is very suitable for building large-scale photovoltaic power stations.

[0003] However, in areas such as deserts, gobi, and wastelands, the climate is dry, the environment is harsh, and sandstorms are frequent. Under photovoltaic modules, sand fixation technologies such as straw checkerboards, vegetation, or gravel are generally used. Among them, the service lives of straw checkerboards and gravel are relatively short, and they need to be frequently updated and maintained, with relatively high costs. Moreover, the photovoltaic power station needs to be provided with water collection, water storage and other devices for irrigating vegetation, which not only increases the complexity and installation difficulty of the photovoltaic power station, but also increases the input cost. In addition, the reflectance rates of straw checkerboards, vegetation, or gravel are relatively low, affecting the power generation of the back side of photovoltaic modules and reducing economic benefits. Utility Model Content

[0004] The purpose of this application is to provide a photovoltaic desert control system and an ecological photovoltaic power station to achieve wind prevention and sand fixation while reducing the investment cost of the ecological photovoltaic power station and improving economic benefits.

[0005] To achieve the above purpose, this application provides the following technical solutions:

[0006] A photovoltaic desert control system includes:

[0007] Photovoltaic modules and a support frame, and the support frame supports the photovoltaic modules;

[0008] A reflective film, and the reflective film is laid on the ground and attached under the photovoltaic modules.

[0009] In the photovoltaic sand control system provided by the present utility model, a reflective film is laid on the ground under the photovoltaic modules. The reflective film forms a sand barrier for the sand and dust below it. When the wind blows through the photovoltaic array, there is a venturi effect between the lowest part of the photovoltaic module and the ground surface, which is likely to cause wind erosion, resulting in the excavation and accumulation of sand and soil under the photovoltaic module. The reflective film can play a role in fixing sand, preventing the excavation and accumulation of sand and soil under the photovoltaic module. At the same time, the reflective film has the function of reflecting light, which can reflect a part of the sunlight to the back of the photovoltaic module, thereby increasing the power generation of the photovoltaic module. The applicant conducted experiments in Yinchuan, Ningxia and found that laying a reflective film under the photovoltaic module can increase the power generation of the photovoltaic module by 6%, thereby improving the economic benefits.

[0010] Compared with the existing sand control technologies using sand barriers such as straw checkerboards, vegetation or gravel, the reflective film has a lower cost, and the service life of the reflective film generally exceeds 15 years without the need for frequent renewal and maintenance. Therefore, using the reflective film as a sand barrier can reduce the investment cost and maintenance cost of the photovoltaic sand control system. In addition, compared with the existing method of planting plants under the photovoltaic module, laying a reflective film under the photovoltaic module can reduce the number of plants, thereby reducing the water demand of the plants. At the same time, the coverage of the reflective film can reduce the evaporation of water in the sandy land and improve the water resources available for each individual plant.

[0011] In one implementation, along the first direction, the heights of the opposite ends of the photovoltaic module are not equal;

[0012] The reflective film includes at least one slope surface along the first direction. With such a setting, the rainwater flowing down from the photovoltaic module can fall onto the slope surface, and the rainwater can flow along the slope surface to the plant area adjacent to the reflective film, so that more rainwater can be collected in the plant area.

[0013] In one implementation, the slope of the slope surface of the reflective film is 2% - 20%, so as to ensure that more rainwater flows along the slope surface of the reflective film to the plant area while preventing the sand and dust near the reflective film from being impacted.

[0014] In one implementation, the reflective film includes two slope surfaces arranged in sequence along the first direction, and the middle position of the reflective film along the first direction is higher than the opposite ends and edges of the reflective film along the first direction. The rainwater falling on the two slope surfaces can flow along the slope surface to the lowest end edge of the slope surface, and finally the rainwater flows along the two slope surfaces to the plant areas on both sides of the reflective film, improving the water collection capacity of the plant areas on both sides of the reflective film.

[0015] In one implementation, the number of photovoltaic modules is multiple, and the multiple photovoltaic modules are arranged in multiple rows. The reflective film under each row of photovoltaic modules includes a first reflective film and a second reflective film, and both the first reflective film and the second reflective film extend along the arrangement direction of the photovoltaic modules in the same row; the first reflective film and the second reflective film can be continuously laid along the arrangement direction of the photovoltaic modules in the same row, reducing the cutting times of the first reflective film and the second reflective film, and improving the water collection and sand fixation effects of the reflective film.

[0016] The first reflective film and the second reflective film are of an integral structure or are spliced together for easy paving of the reflective film; and / or, the width of the first reflective film and / or the second reflective film is 2.5 m to 3.5 m to adapt to photovoltaic modules of different sizes.

[0017] In one implementation, along the first direction, the middle position of the reflective film is aligned with the middle position of the photovoltaic modules in the same row, so that the reflective film is evenly distributed under the photovoltaic modules, and thus the sunlight reflected by the reflective film to the back of the photovoltaic modules is more uniform.

[0018] In one implementation, along the vertical direction, the orthographic projection of the photovoltaic modules on the ground is located inside the projection of the reflective film on the ground; and / or, the distance by which the edge of the projection of the reflective film on the ground extends beyond the edge of the projection of the photovoltaic modules on the ground is 0.7 m to 1.3 m. With this technical solution, it is ensured that the area of the reflective film is not less than the orthographic projection of the photovoltaic modules on the ground, enabling more light under the photovoltaic modules to be reflected to the back of the photovoltaic modules by the reflective film, further improving the utilization rate of sunlight and the power generation of the photovoltaic modules.

[0019] In one implementation, the reflective film is fixed to the ground by U-shaped nails. The U-shaped nails have the advantages of convenient operation, high quality and low price, and are suitable for fixing the reflective film in sandy land.

[0020] In one implementation, a gasket is provided between the U-shaped nail and the reflective film, and the U-shaped nail presses on the reflective film through the gasket, which can prevent the pressure of the U-shaped nail from damaging the reflective film; and / or, the length of the U-shaped nail is not less than 45 cm to prevent the U-shaped nail from detaching from the sandy land and causing the reflective film to be blown off the ground; and / or, the interval between two adjacent U-shaped nails is 1 m to 2 m, ensuring the fixation of the reflective film while reducing costs.

[0021] In one implementation, the reflectivity of the reflective film is greater than or equal to 80%, so that more sunlight incident on the reflective film is reflected to the back of the photovoltaic modules, further improving the utilization rate of sunlight and the power generation of the photovoltaic modules; and / or, the reflective film includes a polyester fiber film, a high-density polyethylene film and / or a polyvinyl chloride film. The films of the above various materials have the characteristics of flame retardancy, high toughness, UV resistance and aging resistance, as well as mildew and moisture resistance and impermeability, and especially have the characteristic of high reflectivity, which is suitable for use as a reflective film; and / or, the reflective film is a diffuse reflective film.

[0022] In one implementation, a row of reflective films is fixedly laid under each row of photovoltaic modules;

[0023] The photovoltaic sand control system further includes multiple rows of sand-growing plant areas, which are arranged alternately with the multiple rows of reflective films. With this technical solution, the rainwater falling on the reflective film can flow towards the two end edges along the first direction, and the rainwater finally flows into the sand-growing plant areas on both sides of the reflective film, realizing the distribution of water resources and improving the water utilization rate.

[0024] In one implementation, it further includes a maintenance road arranged inside the sand-growing plant area and / or between the sand-growing plant area and the reflective film. Workers and maintenance vehicles can approach the photovoltaic modules at different positions via the maintenance road, which is convenient for the maintenance of the photovoltaic modules. And / or, it further includes a grid sand barrier area arranged around the multiple rows of photovoltaic modules and the multiple rows of sand-growing plant areas, further improving the wind prevention and sand fixation effect of the photovoltaic sand control system.

[0025] An ecological photovoltaic power station, characterized in that it includes any one of the above photovoltaic sand control systems. Compared with the prior art, the beneficial effects of the ecological photovoltaic power station provided by the embodiments of the present application are the same as those of the above photovoltaic sand control system, and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0027] Figure 1 It is a schematic diagram of the laying of the reflective film of the photovoltaic sand control system provided by the embodiment of the present application;

[0028] Figure 2 It is a schematic diagram of water collection and wind prevention of the photovoltaic sand control system provided by the embodiment of the present application;

[0029] Figure 3 It is a partial schematic diagram of the photovoltaic sand control system provided by the embodiment of the present application;

[0030] Figure 4 It is a partial schematic diagram of another photovoltaic sand control system provided by the embodiment of the present application;

[0031] Figure 5 It is a schematic diagram of the overall photovoltaic sand control system provided by the embodiment of the present application.

[0032] Reference Signs:

[0033] 1 - Photovoltaic module, 2 - Support frame, 3 - Reflective film, 3a - Slope surface, 3b - First reflective film, 3c - Second reflective film, 4 - Area for psammophytes, 5 - Maintenance road. Detailed implementation manner

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, the following further details this application in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0036] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality" means two or more, unless otherwise specifically defined. "Several" means one or more, unless otherwise specifically defined.

[0037] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0038] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] Please refer to Figure 1, the photovoltaic sand control system provided by the embodiments of the present application includes a photovoltaic module 1, a support frame 2, and a reflective film 3. Among them, the support frame 2 supports the photovoltaic module 1, that is, the photovoltaic module 1 is installed on the top of the support frame 2, and the bottom end of the support frame 2 is fixedly installed on the ground. The reflective film 3 is laid on the ground under the photovoltaic module 1. Specifically, the reflective film 3 is laid on the ground under the photovoltaic module 1.

[0040] In the photovoltaic sand control system provided by the present utility model, a reflective film 3 is laid on the ground under the photovoltaic module 1. The reflective film 3 forms a sand barrier for the sand and dust below it. When the wind blows through the photovoltaic array, there is a venturi effect between the lowest point of the photovoltaic module 1 and the ground surface, which is prone to wind erosion, resulting in the excavation and accumulation of sand under the photovoltaic module 1. The reflective film 3 can play a role in fixing sand, preventing the excavation and accumulation of sand under the photovoltaic module 1. At the same time, the reflective film 3 has the function of reflecting light, and can reflect a part of the sunlight to the back of the photovoltaic module 1, thereby increasing the power generation of the photovoltaic module 1. The applicant conducted experiments in Yinchuan, Ningxia and found that by laying the reflective film 3 under the photovoltaic module 1, the power generation of the photovoltaic module 1 can be increased by 6%, thereby improving the economic benefits.

[0041] Compared with the prior art that uses sand barrier technologies such as straw checkerboards, vegetation, or gravel to fix sand, the reflective film 3 has a lower cost, and the service life of the reflective film 3 generally exceeds 15 years, and there is no need for frequent renewal and maintenance. Therefore, using the reflective film 3 as a sand barrier can reduce the investment cost and maintenance cost of the photovoltaic sand control system. In addition, compared with the prior art of planting plants under the photovoltaic module 1, laying the reflective film 3 under the photovoltaic module 1 can reduce the number of plants, thereby reducing the water demand of the plants. At the same time, the coverage of the reflective film 3 can reduce the evaporation of water in the sandy land and improve the water resources available for individual plants.

[0042] In a specific embodiment, along the first direction, the heights of the opposite ends of the photovoltaic module 1 are not equal. That is, among the two ends of the photovoltaic module 1 along the first direction, one end is higher than the other end, so that the light-receiving surface of the photovoltaic module 1 is inclined to receive more sunlight. In this solution, the reflective film 3 includes at least one slope 3a along the first direction. Specifically, along the first direction, the heights of the two ends of the slope 3a are not equal, or rather, among the two ends of the slope 3a along the first direction, one end is higher than the other end. As Figure 2 shown, by setting it like this, the rainwater flowing down from the photovoltaic module 1 can fall onto the slope 3a, and the rainwater can flow along the slope 3a to the plant area adjacent to the reflective film 3, so that more rainwater can be collected in the plant area.

[0043] In the above embodiments, if the slope of the slope surface 3a of the reflective film 3 is too small, it cannot drain rainwater; if the slope is too large, the impact force on the dust near the reflective film 3 may be too large. Therefore, the slope of the slope surface 3a of the reflective film 3 is 2% to 20%, so as to ensure that more rainwater flows along the slope surface 3a of the reflective film 3 to the plant area while preventing the dust near the reflective film 3 from being impacted. Exemplarily, the slope of the slope surface 3a of the reflective film 3 is 2%, 5%, 8%, 10%, 12%, 15%, 18%, or 20%, etc.

[0044] As a preferred embodiment, the reflective film 3 includes two slope surfaces 3a arranged in sequence along the first direction, and the middle position of the reflective film 3 along the first direction is higher than the opposite end edges of the reflective film 3 along the first direction. Specifically, the two slope surfaces 3a of the reflective film 3 are inclined in opposite directions, the highest edges of the two slope surfaces 3a are connected, and the lowest edges of the two slope surfaces 3a are arranged away from each other. With this technical solution, as Figure 2 shown, the rainwater falling on the two slope surfaces 3a can flow along the slope surface 3a to the lowest end edge of the slope surface 3a, and the rainwater finally flows along the two slope surfaces 3a into the plant areas on both sides of the reflective film 3, improving the water collection amount in the plant areas on both sides of the reflective film 3.

[0045] As Figure 3 and Figure 4 shown, the number of photovoltaic modules 1 can be multiple, and the multiple photovoltaic modules 1 are distributed in multiple rows, and the multiple rows of photovoltaic modules 1 are distributed in parallel. A reflective film 3 is laid on the ground under each row of photovoltaic modules 1. The reflective film 3 under each row of photovoltaic modules 1 includes a first reflective film 3b and a second reflective film 3c, and both the first reflective film 3b and the second reflective film 3c extend along the arrangement direction of the photovoltaic modules 1 in the same row. Specifically, the multiple rows of photovoltaic modules 1 are arranged along the first direction, and the multiple photovoltaic modules 1 included in each row of photovoltaic modules 1 are arranged in sequence along the second direction, and the length directions of both the first reflective film 3b and the second reflective film 3c extend along the second direction. In this embodiment, the first reflective film 3b and the second reflective film 3c can be laid continuously along the arrangement direction of the photovoltaic modules 1 in the same row, reducing the cutting times of the first reflective film 3b and the second reflective film 3c, and improving the water collection and sand fixation effects of the reflective film.

[0046] In the above embodiment, the first reflective film 3b and the second reflective film 3c are an integral structure or a spliced ​​structure. If the first reflective film 3b and the second reflective film 3c are an integral structure, a through hole for the support frame 2 to pass through can be opened at the position corresponding to the reflective film 3 and the support frame 2. The first reflective film 3b and the second reflective film 3c of the integral structure are easy to pave and can avoid water leakage at the joint between the two. If the first reflective film 3b and the second reflective film 3c are spliced ​​to form the reflective film 3, the edge of the first reflective film 3b and the edge of the second reflective film 3c can overlap and bond together, or the edge of the first reflective film 3b and the edge of the second reflective film 3c can be fixed together by U-shaped nails. The joint of the first reflective film 3b and the second reflective film 3c can be aligned with the support frame 2, so that the edge of the first reflective film 3b and the edge of the second reflective film 3c can be arranged around the support frame 2, and there is no need to separately open a through hole for the support frame 2 to pass through.

[0047] In addition, the width of the first reflective film 3b and / or the second reflective film 3c is 2.5m to 3.5m. Specifically, the width of the first reflective film 3b and / or the second reflective film 3c can be set according to the width of the photovoltaic module 1. Preferably, the sum of the widths of the first reflective film 3b and the second reflective film 3c is greater than or equal to the width of a row of photovoltaic modules 1, so that more sunlight can be reflected to the back of the photovoltaic module 1 by using the reflective film 3. Therefore, according to the size of different models of photovoltaic modules 1, the width of the first reflective film 3b and / or the second reflective film 3c is set within the range of 2.5m to 3.5m to increase the sunlight reflected to the back of the photovoltaic module 1 and improve the power generation. Exemplarily, the width of the first reflective film 3b and / or the second reflective film 3c is 2.5m, 2.6m, 2.7m, 2.7m, 2.8m, 2.9m, 3.0m, 3.1m, 3.2m, 3.3m, 3.4m or 3.5m.

[0048] In a specific embodiment, along the first direction, the middle position of the reflective film 3 is aligned with the middle position of the photovoltaic components 1 in the same row. Figure 1 As shown, in this technical solution, the reflective film 3 is evenly distributed on both sides of the center line of the photovoltaic modules 1 in the same row parallel to the second direction, and then the reflective film 3 is evenly distributed below the photovoltaic modules 1, so that the sunlight reflected by the reflective film 3 to the back of the photovoltaic modules 1 is more uniform, avoiding large current differences in various areas on the back of the photovoltaic modules 1. Of course, the solution in which the reflective film 3 is staggered from the support frame 2 in the middle position along the first direction is also within the protection scope of this application.

[0049] In addition, along the vertical direction, the orthographic projection of the photovoltaic module 1 on the ground is located inside the projection of the reflective film 3 on the ground. Specifically, the edge of the projection of the reflective film 3 on the ground extends beyond the edge of the orthographic projection of the photovoltaic module 1 on the ground. With this technical solution, it is ensured that the area of the reflective film 3 is not less than the orthographic projection of the photovoltaic module 1 on the ground, enabling more light below the photovoltaic module 1 to be reflected to the back of the photovoltaic module 1 through the reflective film, further improving the utilization rate of sunlight and the power generation of the photovoltaic module 1.

[0050] The distance by which the edge of the orthographic projection of the reflective film 3 on the ground extends beyond the edge of the orthographic projection of the photovoltaic module 1 on the ground can be set according to the construction site conditions and sunlight conditions. Preferably, the distance by which the edge of the orthographic projection of the reflective film 3 on the ground extends beyond the edge of the orthographic projection of the photovoltaic module 1 on the ground is 0.7 m to 1.3 m, so as to improve the utilization rate of sunlight while reserving a reasonable area for the plant area. Exemplarily, the distance by which the edge of the orthographic projection of the reflective film 3 on the ground extends beyond the edge of the orthographic projection of the photovoltaic module 1 on the ground is 0.7 m, 0.8 m, 0.9 m, 1.0 m, 1.2 m, or 1.3 m.

[0051] In each of the above embodiments, the reflective film 3 can be fixed to the ground by U-shaped nails. U-shaped nails have the advantages of convenient operation, high quality and low price, and are suitable for fixing the reflective film 3 in sandy soil. Alternatively, the reflective film 3 can also be pressed on the sandy ground by pressing blocks, pressing bars, etc.

[0052] In the above embodiment, a gasket is provided between the U-shaped nail and the reflective film 3, and the U-shaped nail presses on the reflective film 3 through the gasket, which can prevent the pressure of the U-shaped nail from damaging the reflective film 3. The gasket can specifically be a sponge pad, a rubber pad, a silicone pad, etc. In addition, considering that the sandy soil is relatively loose, the length of the U-shaped nail is not less than 45 cm to prevent the U-shaped nail from detaching from the sandy soil and causing the reflective film 3 to be blown off the ground. Exemplarily, the length of the U-shaped nail can be 45 cm, 48 cm, 50 cm, etc.

[0053] The interval between two adjacent U-shaped nails is 1 m to 2 m. If the interval between two adjacent U-shaped nails is too large, the reflective film 3 between the two U-shaped nails may be torn by the wind; if the interval between two adjacent U-shaped nails is too small, the usage amount of U-shaped nails increases, resulting in increased costs. In view of the above situation, the interval between two adjacent U-shaped nails is 1 m to 2 m, ensuring the fixation of the reflective film 3 while reducing costs.

[0054] In a specific embodiment, the reflectivity of the reflective film 3 is greater than or equal to 80%, so that more sunlight incident on the reflective film 3 is reflected to the back of the photovoltaic module 1, further improving the utilization rate of sunlight and the power generation of the photovoltaic module 1. Exemplarily, the reflectivity of the reflective film 3 can be 80%, 82%, 84%, 85%, 88%, or 90%.

[0055] The reflective film 3 includes a polyester fiber film, a high-density polyethylene film, and / or a polyvinyl chloride film. The films of the above various materials have the characteristics of flame retardancy, high toughness, UV resistance and aging resistance, as well as mildew prevention, moisture prevention, and water impermeability. In particular, they have the characteristic of high reflectivity, which is suitable for the use of the reflective film 3. Specifically, the upper surface of the reflective film can be white. Among the reflective films 3 of the same material, the white reflective film 3 has a higher reflectivity. The reflective film 3 can be a diffuse reflective film, so that the sunlight reflected to the back of the photovoltaic module 1 by the diffuse reflective film is more uniform. Specifically, the reflective film 3 can be a stretched film.

[0056] As Figure 5 shown, a row of reflective films 3 is fixedly laid below each row of photovoltaic modules 1. The photovoltaic desert control system further includes multiple rows of sand-growing plant areas 4, and the multiple rows of sand-growing plant areas 4 and the multiple rows of reflective films 3 are arranged alternately. Specifically, a row of sand-growing plant areas 4 is arranged between two adjacent rows of reflective films 3, and sand-growing plants are planted in the sand-growing plant areas 4. The sand-growing plants can be local native plants. With this technical solution, the rainwater falling on the reflective film 3 can flow towards the two end edges along the first direction, and the rainwater finally flows into the sand-growing plant areas 4 on both sides of the reflective film 3, realizing the distribution of water resources and improving the utilization rate of water.

[0057] In the above embodiments, the photovoltaic desert control system further includes a maintenance road 5 arranged inside the sand-growing plant area 4 and / or between the sand-growing plant area 4 and the reflective film 3. Specifically, the maintenance road 5 can be located inside the sand-growing plant area 4, or the maintenance road 5 is located between the sand-growing plant area 4 and the reflective film 3. Staff and maintenance vehicles can approach the photovoltaic modules 1 at different positions through the maintenance road 5, which is convenient for the maintenance of the photovoltaic modules 1.

[0058] In addition, the photovoltaic desert control system can further include a grid sand barrier area arranged around the multiple rows of photovoltaic modules 1 and the multiple rows of sand-growing plant areas 4. The grid sand barrier area is arranged on the periphery of the photovoltaic desert control system to further improve the wind prevention and sand fixation effect of the photovoltaic desert control system.

[0059] In addition, the embodiment of the present application further provides an ecological photovoltaic power station, which includes the photovoltaic desert control system provided in any of the above embodiments. Compared with the prior art, the beneficial effects of the ecological photovoltaic power station provided by the embodiment of the present application are the same as those of the above photovoltaic desert control system, and will not be elaborated here.

[0060] In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples.

[0061] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims described above.

Claims

1. A photovoltaic sand control system, characterized in that: include: A photovoltaic assembly and a support frame, wherein the support frame supports the photovoltaic assembly; A reflective film, the reflective film is laid under the photovoltaic module in contact with the ground; Along the first direction, the heights of the two opposite ends of the photovoltaic assembly are different; The reflective film includes at least one slope surface along a first direction.

2. The photovoltaic sand control system according to claim 1, characterized in that: The slope of the slope of the reflective film is 2% to 20%.

3. The photovoltaic sand control system according to claim 1, characterized in that: The reflective film comprises two slopes arranged in sequence along a first direction, and a middle position of the reflective film along the first direction is higher than two opposite edges of the reflective film along the first direction.

4. The photovoltaic sand control system according to claim 1, characterized in that: There are multiple photovoltaic modules, which are arranged in multiple rows. The reflective films under each row of photovoltaic modules include a first reflective film and a second reflective film. Both the first reflective film and the second reflective film extend along the arrangement direction of the photovoltaic modules in the same row. The first reflective film and the second reflective film are an integrated structure or are spliced ​​together, and / or the width of the first reflective film and / or the second reflective film is 2.5m to 3.5m.

5. The photovoltaic sand control system according to claim 1, characterized in that: Along the first direction, the middle position of the reflective film is aligned with the middle position of the photovoltaic components in the same row.

6. The photovoltaic sand control system according to claim 1, characterized in that: In the vertical direction, the orthographic projection of the photovoltaic module on the ground is located inside the projection of the reflective film on the ground; and / or the edge of the orthographic projection of the reflective film on the ground exceeds the edge of the orthographic projection of the photovoltaic module on the ground by 0.7m to 1.3m.

7. The photovoltaic sand control system according to claim 1, characterized in that: The reflective film is fixed on the ground by U-shaped nails.

8. The photovoltaic sand control system according to claim 7, characterized in that: A gasket is provided between the U-shaped nail and the reflective film; and / or the length of the U-shaped nail is not less than 45 cm; and / or the interval between two adjacent U-shaped nails is 1 m to 2 m.

9. The photovoltaic sand control system according to any one of claims 1 to 8, characterized in that: The reflectivity of the reflective film is greater than or equal to 80%; and / or the reflective film includes a polyester fiber film, a high-density polyethylene film and / or a polyvinyl chloride film; and / or the reflective film is a diffuse reflective film.

10. The photovoltaic sand control system according to any one of claims 1 to 8, characterized in that: A row of reflective films is fixedly laid under each row of photovoltaic modules; The photovoltaic sand control system also includes multiple rows of sand-growing plant areas, and the multiple rows of sand-growing plant areas and the multiple rows of reflective films are alternately arranged.

11. The photovoltaic sand control system according to claim 10, characterized in that: It also includes a maintenance road arranged inside the desert plant area and / or between the desert plant area and the reflective film; and / or, it also includes a grid sand barrier area arranged around multiple rows of photovoltaic modules and multiple rows of desert plant areas.

12. An ecological photovoltaic power station, characterized in that: It comprises the photovoltaic sand control system as described in any one of claims 1 to 11.

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