Photovoltaic desertification control system based on photovoltaic electric field waste as well as construction method and application of photovoltaic desertification control system

Abstract

The invention discloses a photovoltaic desertification control system based on photovoltaic electric field waste and a construction method and application of the photovoltaic desertification control system. The photovoltaic desertification control system comprises a grid sand barrier unit, a sand blocking barrier unit, a vegetation planting unit and a sand fixing barrier unit, wherein the grid sand barrier unit and the sand blocking barrier unit are sequentially arranged on the periphery of a photovoltaic field area in the main wind direction; and the vegetation planting unit and the sand fixing barrier unit are arranged in the photovoltaic field area. Each grid sand barrier unit comprises a grid sand barrier extending in a zigzag shape on the ground, and each grid unit is composed of a plurality of vertical barrier bodies and a support; the sand-blocking barrier unit comprises a ground trapezoidal sand-blocking barrier and is composed of a support and two barrier bodies which are symmetrically and obliquely erected on the two sides of the support. The vegetation planting unit comprises a planting plate covering the ground between photovoltaic panels; the sand-fixing barrier unit comprises a ground straw bionic sand-fixing barrier under a photovoltaic panel. The barrier body is processed by a waste photovoltaic panel packaging base, and the support and the support are respectively processed by waste cable packaging rollers. The system blocks sand on the periphery and stabilizes sand in the field, so that the photovoltaic electric field is protected from being damaged by wind and sand, and stable operation of the photovoltaic electric field is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of wind and sand protection technology for photovoltaic fields, and in particular to a photovoltaic sand control system based on photovoltaic farm waste, its construction method and application. Background Technology

[0002] During the construction of photovoltaic (PV) power plants, a large amount of packaging materials are generated for PV panels, cables, and support structures, such as bases for supporting the panels, cable rollers, and wooden crates for packaging the structures. These packaging materials are typically made of plywood. Once the PV power plant enters its operation and maintenance phase, these materials become waste, piled up along the roadsides within the PV array area, and removed from the site using forklifts and flatbed trucks. Currently, there is no effective way to utilize this waste, resulting in a significant waste of manpower and resources during its removal and disposal. After the completion of the PV power plant construction, how to handle this waste becomes an urgent problem to be solved. This work involves not only cost reduction and environmental protection but also resource recycling. Summary of the Invention

[0003] The main objective of this invention is to provide a photovoltaic desertification control system based on photovoltaic power plant waste, its construction method and application, thereby overcoming the shortcomings of the prior art.

[0004] To achieve the aforementioned objectives, the technical solution adopted by this invention includes: The first aspect of the present invention provides a photovoltaic desertification control system based on photovoltaic power plant waste, including a grid sand barrier unit, a sand blocking barrier unit, a vegetation planting unit and a sand stabilizing barrier unit. The grid sand barrier unit and the sand blocking barrier unit are arranged sequentially along the prevailing wind direction on the periphery of the photovoltaic field area, and the vegetation planting unit and the sand stabilizing barrier unit are both located inside the photovoltaic field area. The grid sand barrier unit includes at least one grid sand barrier, which extends in a zigzag pattern on the ground. Each grid unit of the grid sand barrier includes multiple vertically arranged barrier bodies and multiple supports, with adjacent barrier bodies connected to each other via one of the supports. The sand-blocking barrier unit includes at least one trapezoidal sand-blocking barrier set on the ground. The trapezoidal sand-blocking barrier includes a support and two inclined barrier bodies. The two barrier bodies are symmetrically erected on both sides of the support, so that the vertical cross-section of the trapezoidal sand-blocking barrier is trapezoidal. The vegetation planting unit includes a covering planting board laid on the ground in the area between photovoltaic panels. The covering planting board includes multiple barriers laid flat on the ground, with gaps between adjacent barriers, and the length direction of the barriers is either downwind or perpendicular to the prevailing wind direction. The sand-fixing barrier unit includes a straw-inspired bionic sand-fixing barrier deployed on the ground below the photovoltaic panel; The barrier is a base for packaging waste photovoltaic panels, and the bracket and support are respectively formed by processing waste cable packaging rollers.

[0005] In some more specific schemes, the grid sand barrier unit and the sand blocking barrier unit are respectively deployed in multiple strips, and the multiple strips are parallel to each other and perpendicular to the prevailing wind direction.

[0006] In some more specific schemes, the grid sand barrier unit includes multiple zigzag grid sand barriers, which are distributed in multiple strips, and the multiple strips are parallel to each other and perpendicular to the prevailing wind direction.

[0007] In some more specific solutions, the support in the grid unit is composed of vertical waste cable packaging rollers, and the upper and lower panels of the waste cable packaging rollers are provided with four openings. The four openings are arranged in a cross shape, each opening extends radially, and each opening is engaged with one side of a vertically set barrier top plate.

[0008] In some more specific solutions, each vertically erected barrier in the grid unit is also fixedly connected to its corresponding support via connectors.

[0009] In some more specific solutions, in the trapezoidal sand barrier, the support is composed of vertical waste cable packaging rollers, and the opposite arc-shaped edges of the upper side panel of the waste cable packaging rollers are cut to form straight edges. An inclined barrier is erected on each straight edge to form a trapezoidal sand barrier with a hollow structure. In some more specific designs, the trapezoidal sand barrier has an angle of 45-60° with the ground, with the optimal angle being 45°.

[0010] In some more specific designs, the trapezoidal sand barrier is fixedly connected to the middle support on both sides by connectors and / or air nails.

[0011] In some more specific schemes, the covering planting board consists of multiple barriers laid flat on the ground, with gaps between adjacent barriers, and the length direction of the barriers is either downwind or perpendicular to the prevailing wind direction.

[0012] In some more specific embodiments, the covering planting board also includes irrigation pipes, which are arranged in an S-shape on the ground in the gaps between adjacent barriers in the covering planting board.

[0013] In some more specific solutions, the straw biomimetic sand-fixing barrier includes a first flat structure, an interlocking structure, and a second flat structure, with the second flat structure laid on the upper surface of the first flat structure.

[0014] In some more specific solutions, the first flat-laying structure includes multiple straws laid flat on the ground, the straws extending in a random direction, the covering thickness being 2-10 cm, and the ground coverage being 80%-100%; In some more specific solutions, the plug-in structure includes multiple straws that are erected or inclined on the ground. The number of straws in the plug-in structure is 15% to 25% of the number of straws in the first flat structure, and the insertion depth into the ground is 5 to 10 cm. In some more specific schemes, the second flat structure includes multiple straws laid flat on the first flat structure, with a laying density of 2 to 5 straws per square meter.

[0015] The second aspect of the present invention provides a method for constructing a photovoltaic desertification control system based on photovoltaic power plant waste, comprising: forming a barrier by using a base for packaging waste photovoltaic panels, and processing rollers for packaging waste cables to form a bracket and a support, respectively; The steps for constructing a grid sand barrier unit include: setting up at least one grid sand barrier along the prevailing wind direction around the periphery of the photovoltaic field area, so that the grid sand barrier extends along a zigzag path; erecting multiple barriers in each grid unit of the grid sand barrier, and fixing adjacent barriers together with the support frame. At least one trapezoidal sand barrier is deployed on the downstream side of the grid sand barrier unit along the prevailing wind direction, including: setting the support on the ground; symmetrically and inclinedly erecting one end of the two barriers on both sides of the support, so that the vertical cross-section of the trapezoidal sand barrier forms a trapezoidal structure. The steps for constructing a vegetation planting unit include: laying a covering planting board in the area between photovoltaic panels inside the photovoltaic field, wherein the covering planting board is formed by laying multiple barriers flat, with gaps between adjacent barriers, and the length direction of the barriers is parallel to or perpendicular to the main wind direction. The steps for constructing sand-fixing barrier units include: laying straw bionic sand-fixing barriers on the ground below the photovoltaic panels inside the photovoltaic field.

[0016] A third aspect of the present invention provides a method for wind and sand protection, comprising: constructing a photovoltaic sand control system at the periphery and inside of a photovoltaic field area according to a method for constructing a photovoltaic sand control system based on photovoltaic farm waste, thereby blocking wind and fixing sand at the periphery and / or inside of the photovoltaic field area.

[0017] Compared with the prior art, the advantages of the present invention include at least the following: First, this invention provides a photovoltaic desertification control system based on photovoltaic power plant waste. Grid sand barrier units and sand-blocking barrier units are sequentially deployed along the prevailing wind direction around the photovoltaic power plant area, their main function being to prevent windblown sand from entering the area. Vegetation planting units and sand-fixing barrier units are located inside the photovoltaic power plant area, fixing the sand and preventing on-site sand movement. Together, they form a zoned and layered protection system of "external sand blocking – internal sand fixation," effectively protecting the photovoltaic power plant from wind and sand damage while ensuring its stable operation.

[0018] Secondly, the present invention provides a photovoltaic desertification control system based on photovoltaic power plant waste. The grid sand barrier integrates sand blocking and sand fixation functions, taking into account the sand blocking effect of traditional tall vertical sand barriers, while having the sand fixation function of tall vertical large grid. The zigzag grid structure can intercept sand from multiple wind directions, solving the problem of the single sand blocking direction of traditional straight sand barriers, improving the comprehensive sand blocking efficiency of the surrounding sand source area, with a large sand blocking capacity and long project life.

[0019] Third, the present invention provides a photovoltaic desertification control system based on photovoltaic power plant waste. In the trapezoidal sand-blocking barrier, one end of two barriers is placed diagonally against both sides of the support, thereby forming a hollow trapezoidal sand-blocking barrier. This structure blocks flowing sand on both sides of the barrier and stores flowing sand in the middle, resulting in a higher sand-blocking capacity than traditional sand-stabilized dikes. The supporting legs and base plate of the barrier itself increase the surface roughness of the barrier, thereby increasing its sand-blocking capacity.

[0020] Fourth, this invention provides a photovoltaic sand control system based on photovoltaic farm waste. By deploying grid sand barriers and trapezoidal sand barriers on the windward perimeter of the photovoltaic farm area, it effectively blocks and fixes sand and dust coming from the upwind direction, thereby inhibiting wind and sand intrusion into the farm area. By utilizing waste generated during the construction of the photovoltaic farm to establish a wind-blocking structure for wind and sand control, it achieves the beneficial effect of taking from the photovoltaic farm, serving the photovoltaic farm, and turning waste into resources. This not only saves on transportation costs but also utilizes waste to construct a wind and sand protection system for the photovoltaic farm, reducing wind and sand hazards to the farm area and achieving multiple benefits.

[0021] Fifth, this invention provides a photovoltaic desertification control system based on photovoltaic power plant waste. The vertically inserted straw in the biomimetic straw sand-fixing barrier is randomly distributed in position and direction, simulating the spatial distribution and structural characteristics of natural grassland grass communities. This better fixes sand coming from multiple wind directions, providing a more balanced ability to block sand from different directions. Simultaneously, the vertical straw can stably lay flat, protecting it from wind erosion and enhancing the overall structural stability. It also achieves full coverage of the sand surface, reducing water evaporation and improving water retention capacity, while creating a favorable microenvironment for desert plants. Furthermore, only 15%-25% of the straw needs to be randomly inserted, with the majority laid flat, reducing the workload, saving labor costs, and significantly improving construction efficiency compared to traditional straw checkerboard systems. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the photovoltaic desertification control system based on photovoltaic power plant waste provided in an embodiment of the present invention; Figure 2 This is a top view schematic diagram of the grid sand barrier provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the bracket provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the barrier structure provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the connection between the barrier and the support in the grid sand barrier provided in an embodiment of the present invention; Figure 6 This is a cross-sectional schematic diagram of the trapezoidal sand-blocking barrier provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the trapezoidal sand barrier provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the straw biomimetic sand-fixing barrier provided in an embodiment of the present invention. Attached image description:

[0024] 1. Grid sand barrier; 11. Support; 111. Opening; 12. Barrier body; 121. Top plate; 122. Supporting leg; 123. Base plate; 2. Trapezoidal sand barrier; 21. Support; 3. Covering planting board; 31. Drip irrigation pipe; 4. Straw biomimetic sand-fixing barrier; 41. Interlocking structure; 42. First flat structure; 43. Second flat structure; 5. Fence; 6. Photovoltaic panel; 7. Northerly wind; 8. Westerly wind; 9. Desert plants. Detailed Implementation

[0025] As mentioned earlier, existing technologies suffer from several drawbacks. First, the large amount of waste generated during photovoltaic field construction lacks effective utilization methods, easily leading to environmental pollution and resource waste. Second, in terms of wind and sand control, they primarily rely on mesh structures to intercept sand particles, with a relatively low proportion of solid barriers. These structures are easily damaged in strong wind and sand environments, exhibiting limited wind and sand resistance. Furthermore, these structures typically require industrially produced connecting blocks and protective nets, which undoubtedly increases material procurement and transportation costs. To address these problems in existing technologies, the applicant has proposed the technical solution of this invention. The following will further explain and illustrate this technical solution, its implementation process, and its principles.

[0026] Please refer to Figure 1 This embodiment provides a photovoltaic desertification control system based on photovoltaic power plant waste, including a grid sand barrier unit, a sand-blocking barrier unit, a vegetation planting unit, and a sand-fixing barrier unit. Specifically, the grid sand barrier unit and the sand-blocking barrier unit are arranged sequentially around the perimeter of the photovoltaic power plant area along the prevailing wind direction, and their main function is to block the invasion of sand and dust. The vegetation planting unit and the sand-fixing barrier unit are both located inside the photovoltaic power plant area, fixing the sand and preventing it from being blown away by the wind. The two form a layered protection system of "peripheral sand blocking - internal sand fixation," effectively protecting the photovoltaic power plant from wind and sand damage, and also ensuring the stable operation of the photovoltaic power plant.

[0027] The grid-like sand barrier units are zigzag-shaped, effectively blocking and fixing most of the shifting sand transported to the site, thus suppressing the main sand source at its source. Specifically, this grid structure disperses the impact of wind and sand, allowing the shifting sand to gradually settle within the grid, reducing the encroachment of sand and dust on the site. The sand barrier units are trapezoidal, with a hollow center, allowing a large amount of shifting sand to be deposited in the spaces on both sides and in the middle. Through this structure, the sand barrier units not only block the remaining shifting sand but also effectively prevent the further spread of sand sources, thus preventing sand and dust intrusion at multiple levels. Vegetation planting units are arranged in the areas between the panels within the site, where there is strong sunlight and high evaporation. These planting units effectively suppress sand movement and prevent on-site sand lifting, while also retaining moisture and providing favorable conditions for plant growth, further consolidating the sand control and stabilization effect. The main function of the sand barrier units is to consolidate the shifting sand beneath the panels, preventing surface undulations from adversely affecting the equipment in the site. By stabilizing the sand layer, dynamic changes on the ground surface are reduced, ensuring the normal operation of equipment in the area, thus providing a strong guarantee for the stability and long-term effectiveness of the entire sand control system.

[0028] The following sections provide a detailed introduction to the grid sand barrier unit, sand blocking barrier unit, vegetation planting unit, and sand stabilization barrier unit.

[0029] Please refer to Figure 2The grid sand barrier unit includes at least one grid sand barrier 1, which extends in a zigzag pattern on the ground. The grid sand barrier 1 includes multiple grid units, each grid unit including multiple vertically arranged barrier bodies 12 and multiple supports 11. Adjacent barrier bodies 12 are connected to each other via a support 11. The multiple supports 11 and the multiple barrier bodies 12 are interconnected to form a large zigzag grid sand barrier. It should be noted that the vertical arrangement of the barrier bodies 12 in the grid unit means that their length or width direction is parallel to the vertical direction, and the vertical arrangement of the supports 11 means that the axial direction of the rollers constituting the supports 11 is parallel to the vertical direction.

[0030] For details, please refer to Figure 3 The support 11 is composed of upright rollers for packaging waste cables, and has a cylindrical structure, including two circular panels and a cylindrical tube sandwiched between the two circular panels. Four openings 111 are equally spaced on the circular panels, arranged in a cross shape, with each opening 111 extending radially. Please refer to [reference needed]. Figure 4 The barrier 12 is formed from a base used for packaging waste photovoltaic panels. The barrier 12 includes a top plate 121, multiple bottom plates 123, and multiple support legs 122. The multiple bottom plates 123 are arranged parallel to each other and spaced apart on the top plate 121, and each bottom plate 123 is fixed to the top plate 121 by multiple support legs 122.

[0031] Please refer to Figure 5 The width of the opening 111 is adapted to the thickness of the top plate 121 of the barrier 12, allowing the barrier 12 to be engaged and fixed to the support 11 through these openings 111. Specifically, the edge of the top plate 121 passes through and is confined within the opening 111 of the support 11, and is fixed to the support 11 by a fixing structure, which includes a special connector for wooden boards, sheet metal, or nails. Both the support 11 and the first barrier 12 are made of multi-layer composite board. In a specific embodiment, the diameter of the circular panel is 0.8–1.5 m and the thickness is 2.5 cm; the diameter of the cylindrical tube is 0.4–1 m and the height is 0.4–1 m. The length of the top plate 121 is 2 m, the width is 1 m, and the thickness is 2.5 cm. The length of the support leg 122 is 10 cm, the width is 10 cm, and the height is 10 cm. The length of the bottom plate 123 is 2 m, the width is 10 cm, and the thickness is 2.5 cm. In this scheme, the barrier 12 is erected on the ground and combined with the support 11 to construct a zigzag-shaped large grid sand barrier. The erected barrier 12 serves as a tall sand barrier, while the first support 11 connecting these barrier 12 serves the dual function of connecting the first barrier 12 and the sand barrier.

[0032] Please refer to Figures 6-7The sand-blocking barrier unit includes at least one trapezoidal sand-blocking barrier 2 set on the ground. The trapezoidal sand-blocking barrier 2 includes a support 21 and two inclined barrier bodies 12, symmetrically arranged on both sides of the support 21, making the vertical cross-section of the trapezoidal sand-blocking barrier trapezoidal. The slope angle of traditional trapezoidal sand-blocking dikes constructed from sand is typically in the range of 21.8°-45°, with the choice of angle mainly depending on the looseness of the sand. Specifically, there is no fixed "optimal value" for the side angle of a trapezoidal sand-blocking dike; however, an angle of 1:1.5, or approximately 33.7°, is generally recommended and widely used in the industry. However, the trapezoidal sand-blocking barrier 2 proposed in this invention uses wooden planks as the main construction material, and unlike sand-blocking dikes constructed from sand, it does not experience collapse due to the gravity of the sand. Therefore, the angle of the trapezoidal sand-blocking barrier 2 can be designed to be between 45° and 60°. It is worth noting that the smaller the angle, the higher the stability of the structure. Based on considerations of optimal stability, the optimal angle of the trapezoidal sand barrier 2 in this invention is 45°.

[0033] Specifically, the support 21 is composed of vertical rollers used for packaging waste cables. It has a cylindrical structure, including two circular panels and a cylindrical tube sandwiched between the two circular panels. The opposite arc-shaped edges of the upper circular panel are cut to form straight edges, and an inclined barrier 12 is erected on each straight edge. It should be noted that the dimensions of the circular panels and cylindrical tube in the support 21 can be referenced from those in the bracket 11. The barrier 12 in the trapezoidal sand barrier 2 has the same basic structural design as the barrier 12 in the grid sand barrier 1, which can be referred to above and will not be repeated here.

[0034] In this design, two barriers 12 are placed diagonally against both sides of the support 21 to form a trapezoidal sand-blocking barrier. The two barriers 12 are connected diagonally against both sides of the support 21 using specialized wooden board connectors, allowing for connection of the edges of the two boards at any angle. Alternatively, a pneumatic nail gun can be used to drive through and fix the two boards diagonally. This structure increases the area of ​​the barrier against wind and sand by tilting the barriers, and combined with the guiding effect of the trapezoidal cross-section, it effectively reduces near-surface wind speed, promotes sand sedimentation, and further enhances the external wind and sand interception effect.

[0035] In actual deployment, grid sand barrier units and sand-blocking barrier units are arranged sequentially and at intervals along the prevailing wind direction. The grid sand barrier unit includes multiple zigzag grid sand barriers 1, and the sand-blocking barrier unit includes multiple trapezoidal sand-blocking barriers 2. The multiple zigzag grid sand barriers 1 and multiple trapezoidal sand-blocking barriers 2 are distributed within multiple strips, which are parallel to each other and perpendicular to the prevailing wind direction. Deploying the grid sand barriers 1 and trapezoidal sand-blocking barriers 2 on the windward periphery of the photovoltaic field effectively blocks and fixes sand and dust coming from the upwind direction, thereby suppressing the intrusion of wind and sand into the field. By utilizing waste generated during the construction of the photovoltaic field to establish wind-blocking structures and carry out wind and sand control in the photovoltaic field, the beneficial effects of taking from the photovoltaic field, serving the photovoltaic field, and turning waste into materials are achieved. This not only saves on transportation costs but also utilizes waste to construct a wind and sand protection system for the photovoltaic power plant, reducing the wind and sand hazards to the field and achieving multiple benefits.

[0036] Furthermore, the grid sand barrier 1 and trapezoidal sand barrier 2 fully utilize self-generated waste such as discarded cable packaging rollers and photovoltaic panel packaging bases generated during the construction of the photovoltaic field, realizing a resource recycling model of "taken from the field and used in the field." Compared with traditional externally purchased sand-blocking materials, this solution significantly reduces waste transportation costs and protection system construction costs. At the same time, the combined structure of the zigzag large grid and trapezoidal sand barriers, through the synergistic effect of multiple mechanisms of "interception-delay-settlement," significantly improves the control capability of the mobile sand dunes around the field, effectively reducing the erosion damage of wind and sand to photovoltaic power plant equipment, array panels, and internal sand-fixing structures, providing reliable wind and sand protection for the long-term stable operation of the photovoltaic field.

[0037] Please refer to Figure 1 The vegetation planting unit includes a planting cover 3 laid on the ground between the photovoltaic panels 6. The planting cover 3 includes multiple barriers 12 laid flat on the ground, with gaps between adjacent barriers 12, and the length direction of the barriers 12 is either downwind or perpendicular to the prevailing wind direction. The planting cover 3 also includes irrigation pipes 31, which are S-shaped and laid on the ground in the gaps between adjacent barriers 12 within the planting cover 3. It should be noted that the barriers 12 in the planting cover 3 have the same basic structural design as the barriers 12 in the grid sand barrier 1, which can be referred to above and will not be repeated here.

[0038] During implementation, the sand surface must first be leveled, and then the barrier 12 is laid flat on the leveled sand surface. During laying, a gap of 1-3 cm must be maintained between adjacent barriers 12. The length of the barrier 12 can be with or perpendicular to the wind direction. When deploying in the field, seeds of psammophytic shrubs and grasses, or seedlings such as *Caragana korshinskii*, *Haloxylon ammodendron*, *Caragana sinica*, *Polygonum cuspidatum*, and *Amorpha fruticosa* are first sown in these gaps. Subsequently, the drip irrigation pipes 31 are laid in an S-shape on the sand surface within the gaps of the barrier 12, effectively irrigating the vegetation.

[0039] This solution not only achieves waste reuse but also provides a long-term moisture-retaining environment for sown and planted plants. The base plate 123 and supporting legs 122 on the barrier 12 together form a raised structure that effectively blocks wind and sand, thus protecting the plants from wind and sand damage. Furthermore, this structure's design mimics the above-ground plant spatial structure of gramineous grasslands in nature, offering advantages such as simple construction procedures and high sand-fixing and water-retention efficiency. Compared to traditional grass checkerboard mulching methods, it provides higher coverage and superior water retention performance.

[0040] Please refer to Figure 1 and Figure 8 The sand-fixing barrier unit includes a straw-inspired bionic sand-fixing barrier 4 installed on the ground of the photovoltaic panel 6. The straw-inspired bionic sand-fixing barrier 4 includes a first flat structure 42, an interlocking structure 41, and a second flat structure 43. The second flat structure 43 is laid on the upper surface of the first flat structure 42.

[0041] The first flat-lay structure 42 includes multiple straws laid flat on the ground. In the first flat-lay structure 42, in the area to be stabilized, the straws are randomly laid flat on the sand surface, with the straws extending in a random direction. The covering thickness is controlled at 2-10 cm to ensure that the ground surface is evenly covered, with a coverage rate of 80%-100%. The interlocking structure 41 includes multiple straws erected on the ground. The number of straws in the interlocking structure 41 accounts for 15%-25% of the number of straws in the first flat-lay structure 42. In the interlocking structure 41, the straws are in an upright or oblique position, and the depth of insertion into the ground is 5-10 cm. The second flat-lay structure 43 includes multiple straws laid flat on the first flat-lay structure 42. In the second flat-lay structure 43, the straw laying density is 2-5 straws per square meter.

[0042] The straw in the interlocking structure 41 passes through the first flat structure 42 and the second flat structure 43 and is fixed to the ground. The second flat structure 43 is laid on the upper surface of the first flat structure 42. The straw is laid in a random position and direction of extension, which further fixes it and prevents it from being blown away by the wind, ultimately forming a wind-resistant sand-fixing structure.

[0043] In practice, straw of various types, such as wheat straw, rice straw, reeds, corn straw, and reeds, with a length ranging from 20 to 70 cm, can be selected. More preferably, wheat straw of the first flat-laying structure 42 can be selected with a length ranging from 20 to 70 cm. Corn straw of the second flat-laying structure 43 can be selected with a length ranging from 20 to 70 cm. Unlike traditional straw grids, which require shoveling on all four sides, this invention only requires a small amount of straw insertion work on 15% to 25% of the straw at random positions and in random directions, with most of the straw laid flat. This significantly reduces the amount of insertion work, saves labor costs, and significantly improves construction efficiency compared to traditional straw grids.

[0044] The position and direction of the upright straw are randomly distributed, simulating the spatial distribution and structural characteristics of natural grassland grass communities. This can more effectively fix sand coming from multiple wind directions and provide a more balanced ability to block sand from different directions. At the same time, the upright straw can stabilize the flat straw, protecting it from wind erosion. The amount of flat straw is larger, and the overlapping area between the layers of straw is larger, resulting in stronger mutual support and thus enhancing stability.

[0045] The present invention uses a larger amount of straw than traditional straw grids, achieving full coverage of the sand surface with a wider area and greater thickness. This effectively reduces water evaporation from the sandy soil, enhances water retention, and creates a more favorable microenvironment for the growth of psammophytes. After 2-3 years, the decomposed straw can provide more organic matter for the plants, better promoting the growth of the crust.

[0046] Furthermore, the straw bionic sand-fixing barrier 4 is 1m wide and 2m long. The covering planting board 3 is 1m wide and 2m long. These widths and lengths refer to the dimensions of a single sand-fixing barrier and planting board. The straw bionic sand-fixing barrier 4 is placed under the photovoltaic panel 6, with a width of 3.5-4m below the board. The covering planting board 3 is placed between the photovoltaic panels 6, with a width of 8-12m between the boards. This layout ensures sufficient planting space while maintaining the stability of the sand-fixing effect. A fence 5 is installed between the trapezoidal sand-fixing barrier 2 and the straw bionic sand-fixing barrier 4. The fence 5 serves as the outer boundary of the photovoltaic field, its main function being to enclose and protect the photovoltaic array area, ensuring the safe operation of the photovoltaic equipment. Outside the fence is a flowing sand dune area, which moves with the wind and has a certain degree of unpredictability. Inside the fence is a carefully constructed photovoltaic array area after the sand dunes have been leveled. Here, the photovoltaic panels are neatly arranged, fully utilizing solar energy resources to generate electricity and provide a stable power output to the grid. By setting up fences, the influence of the external environment is not only effectively isolated, but also a strong guarantee is provided for the long-term stable operation of the photovoltaic array.

[0047] In this scheme, multiple parallel grid sand barriers 1 and trapezoidal sand barriers 2 are deployed on the shifting sand dunes on the northerly wind side 7 and the westerly wind side 8 of the periphery of the photovoltaic power plant, respectively, in north-south and east-west directions. Inside the photovoltaic array area of ​​the photovoltaic power plant, straw biomimetic sand-fixing barriers 4 are deployed under the panels, and covering planting boards 3 are deployed between the panels. Through this layout, external barriers and internal fixation can be achieved, effectively protecting the photovoltaic power plant from wind and sand damage.

[0048] Around the zigzag-shaped large-grid sand barriers and trapezoidal sand barriers, inside the straw-based biomimetic sand-fixing barriers, and in the gaps of the planting boards, sand-loving plants were sown and planted to construct a wind and sand protection system. Within a 0-500 meter range on the shifting sand dunes surrounding the photovoltaic power plant, plants such as sand rice and sand sagebrush were sown. Using the zigzag-shaped large-grid sand barriers and trapezoidal sand barriers, these sand rice and sand sagebrush seeds were blocked on the shifting sand dunes outside the photovoltaic power plant fence, preventing these pioneering predatory plants from multiplying and expanding in the array area, thereby reducing the risk of fire.

[0049] In this photovoltaic desertification control system, multiple parallel sand barriers (1), trapezoidal sand barriers (2), planting mulch (3), and straw-based biomimetic sand barriers (4) are deployed to form a gradient protection pattern: The outermost sand barrier unit consists of grid sand barriers (100-400m from the photovoltaic field boundary) and trapezoidal sand barriers (2) positioned between the grid sand barriers and the field boundary (10-100m from the field boundary). Both are 1m high. Given that the downwind protection range of a sand barrier is approximately 20 times its height, the spacing between multiple grid sand barriers, multiple trapezoidal sand barriers, and between grid sand barrier units and trapezoidal sand barrier units is set to 15-20m (less than a 20m protection range). This ensures that the next sand barrier is within the protection range of the previous one, enhancing the sand interception effect through multi-layered synergy and promoting sand deposition in the wind-decelerated areas between the sand barriers. The on-site sand-fixing unit consists of a planting board 3, 1m wide and 2m long, positioned between photovoltaic panels (8-12m between panels, with its width matching the spacing); and a straw-inspired sand-fixing barrier 4, 4m wide (matching the width of the photovoltaic panels) and the same length as the photovoltaic subarray. The spacing between these two barriers is 0-3m (0m for vascular access channels, 3m for 3m wide vascular access channels), achieving full surface sand-fixing coverage on the site. The trapezoidal sand-blocking barrier 2 is spaced 10-100m from the outermost photovoltaic panel 6, further optimizing the spatial matching between the outer sand-blocking perimeter and the on-site facilities, forming an integrated protection system of "multiple outer sand-blocking layers and precise on-site sand-fixing."

[0050] In summary, by organically combining the outer grid sand barrier units with the sand-fixing barrier units, this composite protective structure can effectively intercept and fix the vast majority of wind-blown sand, thus significantly suppressing the accumulation of quicksand at the site's edges. Through this design, the site's edge areas will no longer be troubled by quicksand accumulation, ensuring the stability and safety of the surrounding environment. Inside the site, the combined application of vegetation planting units and sand-fixing barrier units forms a robust defense line, effectively preventing sand particles from being stirred up in situ by wind between or beneath tectonic plates. This combination not only maintains the dynamic balance between erosion and deposition of the underlying surface but also provides favorable conditions for plant growth, thereby improving the ecological environment within the site. Through the root system of vegetation, the soil is reinforced and moisture is retained, which is extremely beneficial to the ecological balance and biodiversity within the site. This integrated protective measure is particularly suitable for areas with abundant sand sources and highly mobile dunes. It effectively prevents quicksand from intruding into the site, while simultaneously creating a certain amount of sediment accumulation in the peripheral strip area. This accumulation not only does not damage the facilities inside the site but also provides a certain degree of protection, especially in preventing sand burial hazards. Through this scientific combination, various facilities inside the site are effectively protected, ensuring the stability and safety of the site's operation.

[0051] It should be understood that the above embodiments are merely illustrative of the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A photovoltaic desertification control system based on photovoltaic power plant waste, characterized in that, It includes grid sand barrier units, sand blocking barrier units, vegetation planting units and sand stabilizing barrier units. The grid sand barrier units and sand blocking barrier units are arranged sequentially along the prevailing wind direction on the periphery of the photovoltaic field area, while the vegetation planting units and sand stabilizing barrier units are all located inside the photovoltaic field area. The grid sand barrier unit includes at least one grid sand barrier, which extends in a zigzag pattern on the ground. Each grid unit of the grid sand barrier includes multiple vertically arranged barrier bodies and multiple supports, with adjacent barrier bodies connected to each other via one of the supports. The sand-blocking barrier unit includes at least one trapezoidal sand-blocking barrier set on the ground. The trapezoidal sand-blocking barrier includes a support and two inclined barrier bodies. The two barrier bodies are symmetrically erected on both sides of the support, so that the vertical cross-section of the trapezoidal sand-blocking barrier is trapezoidal. The vegetation planting unit includes a covering planting board laid on the ground in the area between photovoltaic panels. The covering planting board includes multiple barriers laid flat on the ground, with gaps between adjacent barriers, and the length direction of the barriers is either downwind or perpendicular to the prevailing wind direction. The sand-fixing barrier unit includes a straw-inspired bionic sand-fixing barrier deployed on the ground below the photovoltaic panel; The barrier is formed from a base used for packaging waste photovoltaic panels, and the bracket and support are formed from rollers used for packaging waste cable wires.

2. The photovoltaic desertification control system based on photovoltaic power plant waste according to claim 1, characterized in that, The grid sand barrier unit and the sand blocking barrier unit are respectively arranged in multiple strips, and the multiple strips are parallel to each other and perpendicular to the prevailing wind direction.

3. The photovoltaic desertification control system based on photovoltaic power plant waste according to claim 1, characterized in that, The grid sand barrier unit includes multiple zigzag grid sand barriers, which are distributed in multiple strips. The multiple strips are parallel to each other and perpendicular to the prevailing wind direction.

4. The photovoltaic desertification control system based on photovoltaic power plant waste according to claim 1, characterized in that, In the grid unit, the support is composed of vertical waste cable packaging rollers, and the upper and lower panels of the waste cable packaging rollers are provided with four openings. The four openings are arranged in a cross shape, each opening extends radially, and each opening is engaged with one side of a vertically set barrier top plate.

5. The photovoltaic desertification control system based on photovoltaic power plant waste according to claim 4, characterized in that, Within the grid unit, each vertically erected barrier is fixedly connected to its corresponding support via connectors.

6. The photovoltaic desertification control system based on photovoltaic power plant waste according to claim 1, characterized in that, In the trapezoidal sand barrier, the support is composed of vertical rollers used for packaging waste cables, and the opposite arc-shaped edges of the upper side panel of the rollers used for packaging waste cables are cut to form straight edges. An inclined barrier is erected on each straight edge to form a trapezoidal sand barrier with a hollow structure. And / or, in the trapezoidal sand barrier, the angle between the barrier body and the ground is 45°-60°; And / or, in the trapezoidal sand barrier, the barrier bodies on both sides and the middle support are fixedly connected by connectors and / or air nails.

7. The photovoltaic desertification control system based on photovoltaic power plant waste according to claim 1, characterized in that, The covering planting board consists of multiple barriers laid flat on the ground, with gaps between adjacent barriers, and the length direction of the barriers is either downwind or perpendicular to the prevailing wind direction.

8. The photovoltaic desertification control system based on photovoltaic power plant waste according to claim 7, characterized in that, The covering planting board also includes irrigation pipes, which are arranged in an S-shape on the ground in the gaps between adjacent barriers in the covering planting board.

9. The photovoltaic desertification control system based on photovoltaic power plant waste according to claim 1, characterized in that, The straw biomimetic sand-fixing barrier includes a first flat structure, an interlocking structure, and a second flat structure, with the second flat structure laid on the upper surface of the first flat structure.

10. The photovoltaic desertification control system based on photovoltaic power plant waste according to claim 9, characterized in that, The first flat-lay structure includes multiple straws laid flat on the ground, the straws extending in a random direction, with a cover thickness of 2-10 cm and a ground coverage of 80%-100%; And / or, the plug-in structure includes multiple straws that are erected or inclined on the ground, the number of straws in the plug-in structure is 15% to 25% of the number of straws in the first flat structure, and the insertion depth into the ground is 5 to 10 cm; And / or, the second flat structure includes a plurality of straws laid flat on the first flat structure, with a laying density of 2 to 5 straws per square meter.

11. The method for constructing a photovoltaic desertification control system based on photovoltaic power plant waste as described in any one of claims 1-10, characterized in that, include: The base used for packaging waste photovoltaic panels is used as a barrier, and the rollers used for packaging waste cable wires are processed into brackets and supports respectively; The steps for constructing a grid sand barrier unit include: setting up at least one grid sand barrier along the prevailing wind direction around the periphery of the photovoltaic field area, so that the grid sand barrier extends along a zigzag path; erecting multiple barriers in each grid unit of the grid sand barrier, and fixing adjacent barriers together with the support frame. At least one trapezoidal sand barrier is deployed on the downstream side of the grid sand barrier unit along the prevailing wind direction, including: setting the support on the ground; symmetrically and inclinedly erecting one end of the two barriers on both sides of the support, so that the vertical cross-section of the trapezoidal sand barrier forms a trapezoidal structure. The steps for constructing a vegetation planting unit include: laying a covering planting board in the area between photovoltaic panels inside the photovoltaic field, wherein the covering planting board is formed by laying multiple barriers flat, with gaps between adjacent barriers, and the length direction of the barriers is parallel to or perpendicular to the main wind direction. The steps for constructing sand-fixing barrier units include: laying straw bionic sand-fixing barriers on the ground below the photovoltaic panels inside the photovoltaic field.

12. A method for wind and sand protection, characterized in that, include: The photovoltaic desertification control system is constructed in the periphery and interior of the photovoltaic field area according to the method of claim 11, thereby blocking wind and fixing sand in the periphery and / or interior of the photovoltaic field area.

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