Photovoltaic desertification control power generation device

Abstract

The utility model discloses a photovoltaic desertification control power generation device, which comprises at least two vertical double-sided power generation photovoltaic array units and at least one suspension type covering tent, and the at least two vertical double-sided power generation photovoltaic array units are arranged side by side. The shortest horizontal connecting line between every two adjacent vertical type double-face power generation photovoltaic array units is perpendicular to the shortest horizontal connecting line between the two tower crane foundations in the vertical type double-face power generation photovoltaic array units, and a corresponding suspension type covering tent is connected between every two adjacent vertical type double-face power generation photovoltaic array units. According to the utility model, the problem of dust accumulation on the surface of the photovoltaic module is greatly reduced, water vapor evaporated from the earth surface is effectively blocked and intercepted, and vegetation growth is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic technology, specifically a photovoltaic power generation device. Background Technology

[0002] In desert areas, near-desert areas, or desertified regions, there are generally some common climatic characteristics—frequent winds and abundant sunlight. Intense sunlight combined with frequent and continuous wind erosion erodes the land surface, carrying away moisture, weathering rocks, and hindering plant growth. Conversely, these areas with abundant sunlight are also ideal for renewable energy power generation, especially photovoltaic (PV) power. Therefore, constructing large-scale PV power plants in desertified areas to mitigate desertification is generally referred to as PV desertification control or PV sand control.

[0003] However, there are several technical problems in building photovoltaic power stations in desertified areas: (1) There is a lot of dust in the air, and this dust is very easy to accumulate on the photovoltaic modules installed horizontally or at an angle, which seriously affects the power generation efficiency. The existing solution is to install automatic cleaning equipment for photovoltaic modules in the power station, but this solution is not ideal and the maintenance cost is very high because the dust erosion is ubiquitous and has a great impact on moving parts. (2) There are two major elements in desertification control: wind protection and reducing surface evaporation. The main logic is to create the growth conditions of surface vegetation in the first stage, and to use surface vegetation to modify the soil structure in the second stage in order to achieve natural water retention capacity and thus promote the natural cycle of plant and animal life in the third stage. However, the existing technology of "photovoltaic desertification control" can only achieve wind protection to a small extent (because the photovoltaic array is installed relatively close to the ground), and at the same time, there is a lack of effective measures to reduce surface evaporation.

[0004] Traditional desertification control methods generally rely on setting up windbreaks and planting a large number of plants adapted to the desert environment to stabilize sand. These methods require long-term implementation and management, as well as a large amount of one-way financial investment. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a photovoltaic dust control device that greatly reduces the problem of dust accumulation on the surface of photovoltaic modules and effectively blocks and intercepts water vapor evaporating from the ground, which is beneficial to the growth of vegetation.

[0006] The technical solution of this utility model is as follows:

[0007] A photovoltaic power generation device includes at least two vertical bifacial photovoltaic array units and at least one suspended canopy.

[0008] Each vertical bifacial photovoltaic array unit includes two pylon foundations, two cable pylons, a cable-stayed photovoltaic flexible support, and a set of bifacial photovoltaic arrays. The two pylon foundations are arranged side by side with a gap between them. The bottom ends of the two cable pylons are fixedly connected to the corresponding pylon foundations. The two ends of the cable-stayed photovoltaic flexible support are connected to the two cable pylons to form a vertical support structure. A set of bifacial photovoltaic arrays is arranged vertically and connected to the cable-stayed photovoltaic flexible support.

[0009] At least two vertical bifacial photovoltaic array units are arranged side by side. The shortest horizontal line between two adjacent vertical bifacial photovoltaic array units is perpendicular to the shortest horizontal line between two pylon foundations in the vertical bifacial photovoltaic array unit. Each of the two adjacent vertical bifacial photovoltaic array units is connected to a corresponding suspended canopy.

[0010] Each suspended canopy includes a central suspended plate, four suspended plate ropes, a steel wire rope mesh, and a high-polymer weather-resistant semi-permeable membrane. The high-polymer weather-resistant semi-permeable membrane covers and is fixedly connected to the upper surface of the steel wire rope mesh. The four corners of the steel wire rope mesh are respectively connected to the bottom ends of the four steel cable towers of the two adjacent vertical bifacial photovoltaic array units. The central suspended plate is fixedly connected to the center of the high-polymer weather-resistant semi-permeable membrane. The inner ends of the four suspended plate ropes are respectively connected to the four corners of the central suspended plate, and the outer ends of the four suspended plate ropes are respectively connected to the top ends of the four steel cable towers of the two adjacent vertical bifacial photovoltaic array units. This makes the horizontal height of the center of the high-polymer weather-resistant semi-permeable membrane connected to the steel wire rope mesh higher than the horizontal height of the bottom end of the steel cable tower, so that the high-polymer weather-resistant semi-permeable membrane connected to the steel wire rope mesh forms an arched covering structure.

[0011] The aforementioned cable-stayed photovoltaic flexible support is a grid-like flexible steel cable. Each bifacial photovoltaic module of the bifacial photovoltaic array is positioned and connected to a corresponding grid within the cable-stayed photovoltaic flexible support. The two ends of each horizontal flexible steel cable of the cable-stayed photovoltaic flexible support are locked to the cable tower through corresponding cable tensioning buckles.

[0012] Each vertical bifacial photovoltaic array unit has two cable-stayed towers connected to multiple stay cables. The top ends of the stay cables are connected to multiple cable tensioning buckles on the corresponding cable-stayed towers, and the bottom ends of the stay cables are connected to the top surface of the corresponding tower foundation.

[0013] The aforementioned bifacial photovoltaic array is a photovoltaic array composed of bifacial back-contact silicon heterojunction photovoltaic modules.

[0014] The polymer weather-resistant reflective film has an installation hole at its center. The central hanging plate is horizontally set and fixedly connected to the installation hole of the polymer weather-resistant semi-permeable film. Multiple ventilation holes are formed between the edge of the central hanging plate and the wall of the installation hole.

[0015] Each vertical bifacial photovoltaic array unit also includes a photovoltaic inverter and a power distribution cabinet. The photovoltaic inverter and the power distribution cabinet are installed on the top surface of one of the tower foundations. A set of bifacial photovoltaic arrays are connected to the power distribution cabinet through the photovoltaic inverter.

[0016] The aforementioned polymer weather-resistant semi-permeable membrane is selected from either a polymer weather-resistant high-reflection low-transmittance membrane or a polymer weather-resistant medium-diffuse reflection semi-permeable membrane.

[0017] Advantages of this utility model:

[0018] (1) The vertical bifacial photovoltaic array unit of this utility model has a vertical structure and is suspended. The vertical biomimetic windbreak structure has a significant windproof effect, reduces wind speed, prevents soil erosion, and the surface of the vertically installed photovoltaic module is not easy to accumulate dust, which solves the problem of difficult cleaning of photovoltaic modules.

[0019] (2) The two ends of the vertical bifacial photovoltaic array unit of this utility model adopt a hanging tower structure as the foundation and support, which reduces the number of ground foundations and improves wind resistance, thereby reducing the overall construction cost;

[0020] (3) This utility model connects a suspended cover between two adjacent vertical bifacial photovoltaic array units. The suspended cover can block and intercept water vapor evaporating from the ground surface, and under certain conditions, the water vapor can be naturally condensed and returned to the ground surface. The polymer weather-resistant semi-permeable membrane of the suspended cover is selected from polymer weather-resistant high-reflection low-transmittance membrane or polymer weather-resistant medium-diffuse reflection semi-permeable membrane, which can weaken the intensity of solar radiation, which is conducive to increasing the selection range of sand-fixing plants to be planted on the ground, and can reflect light to the bifacial photovoltaic array, thereby increasing the power generation of the bifacial photovoltaic array. The ventilation hole left in the center of the suspended cover and the suspended cover only have four corner positioning connections, and the edge of the suspended cover is in a suspended state, which can realize natural air convection, which is conducive to the growth of vegetation.

[0021] (4) The double-sided photovoltaic array of this utility model is composed of double-sided back-contact silicon heterojunction photovoltaic modules. Silicon heterojunction photovoltaic cells have good high-temperature power generation performance. At the same time, the back-contact photovoltaic cell structure can reduce the stress caused by the solder ribbon to the cell because all the solder ribbons are welded to the back of the cell. In windy conditions, it can reduce the probability of microcracks in the cell. Attached Figure Description

[0022] Figure 1This is the front view of this utility model.

[0023] Figure 2 This is a top view of the present invention.

[0024] Figure 3 This is a side view of the present invention.

[0025] Figure 4 This is a front view of the vertical bifacial photovoltaic array unit of this utility model.

[0026] Figure 5 This is a schematic diagram of the optical path of the polymer weather-resistant semi-permeable membrane of this utility model, which uses a polymer weather-resistant, high-reflection, low-transmittance membrane.

[0027] Figure 6 This is a schematic diagram of the optical path of the polymer weather-resistant semi-permeable membrane used in this utility model.

[0028] Figure labels: 1-Tower foundation, 2-Cable tower, 3-Cable photovoltaic flexible support, 4-Bifacial photovoltaic array, 5-Photovoltaic inverter, 6-Power distribution cabinet, 7-Cable tensioning lock, 8-Stay cable, 9-Central hanging plate, 10-Hanging plate rope, 11-Wire rope mesh, 12-Polymer weather-resistant semi-permeable membrane, 13-Ventilation hole, 14-Surface sand-fixing vegetation, 15-Direct light, 16-Reflected light from membrane surface, 17-Transmitted light, 18-Surface water vapor, 19-Water droplets, 20-Condensate, 21-Air inlet, 22-Air outlet, 23-Diffuse light from the sky, 24-Diffuse light from the upper surface of the polymer weather-resistant semi-permeable membrane. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] See Figures 1-4 A photovoltaic power generation device includes at least two vertical bifacial photovoltaic array units and at least one suspended canopy.

[0031] Each vertical bifacial photovoltaic array unit includes two pylon foundations 1, two cable-stayed pylons 2, a cable-stayed photovoltaic flexible support 3, a bifacial photovoltaic array 4, a photovoltaic inverter 5, and a power distribution cabinet 6. The two pylon foundations 1 are arranged side by side along the north-south direction with a gap between them. The bottom ends of the two cable-stayed pylons 2 are fixedly connected to their respective pylon foundations 1. The cable-stayed photovoltaic flexible support 3 is a grid of flexible steel cables. The bifacial photovoltaic array 4 is a photovoltaic array composed of bifacial back-contact silicon heterojunction photovoltaic modules. Each bifacial photovoltaic module in the bifacial photovoltaic array 4 is positioned and connected to a corresponding grid in the cable-stayed photovoltaic flexible support 3. The two ends of each flexible steel cable in the horizontal direction of the cable-stayed photovoltaic flexible support 3 are locked together by a corresponding steel cable tensioning buckle 7. On the cable-stayed tower 2, the cable tensioning lock 7 achieves mechanical tensioning of the cable-stayed photovoltaic flexible support 3, making it vertically suspended in the air to form a vertical support structure. Each vertical bifacial photovoltaic array unit has multiple cable stays 8 connected to the two cable-stayed towers 2. The tops of the multiple cable stays 8 are connected to the multiple cable tensioning locks 7 of the corresponding cable-stayed tower 2, and the bottoms of the multiple cable stays 8 are connected to the top surface of the corresponding tower foundation 1. The photovoltaic inverter 5 and the power distribution cabinet 6 are set on the top surface of one of the tower foundations 1. The photovoltaic strings of the bifacial photovoltaic array 4 are connected to the photovoltaic inverter 5. The photovoltaic inverter 5 converts the DC power output by the bifacial photovoltaic array 4 into AC power. The AC output terminal of the photovoltaic inverter 5 is connected to the power distribution cabinet 6 to realize power supply.

[0032] At least two vertical bifacial photovoltaic array units are arranged side by side along the east-west direction, and a corresponding suspended canopy is connected between each two adjacent vertical bifacial photovoltaic array units.

[0033] Each suspended canopy includes a central suspended plate 9, four suspended plate ropes 10, a steel wire rope mesh 11, and a high-polymer weather-resistant semi-permeable membrane 12. The high-polymer weather-resistant semi-permeable membrane 12 is selected from high-polymer weather-resistant high-reflection low-transmittance membrane or high-polymer weather-resistant medium-diffuse reflection semi-permeable membrane. The high-polymer weather-resistant semi-permeable membrane 12 covers and is fixedly connected to the upper surface of the steel wire rope mesh 11. The four corners of the steel wire rope mesh 11 are respectively connected to the bottom ends of the four steel cable towers 2 of the two adjacent vertical bifacial photovoltaic array units. The high-polymer weather-resistant reflective membrane 12 has a mounting hole at its center. The central suspended plate 9 is horizontally set and fixedly connected. Multiple ventilation holes 13 are formed between the edge of the central hanging plate 9 and the wall of the mounting hole in the mounting hole of the polymer weather-resistant semi-permeable membrane 12. The inner ends of the four hanging plate ropes 10 are respectively connected to the four corners of the central hanging plate 9, and the outer ends of the four hanging plate ropes 10 are respectively connected to the top of the four steel cable towers 2 of the two adjacent vertical bifacial photovoltaic array units. This makes the horizontal height of the center of the polymer weather-resistant semi-permeable membrane 12 connected to the steel wire rope mesh 11 higher than the horizontal height of the bottom of the steel cable tower 2, so that the polymer weather-resistant semi-permeable membrane 12 connected to the steel wire rope mesh 11 forms an arched covering structure.

[0034] During installation, the foundation 1 of each vertical bifacial photovoltaic array unit is deeply buried in the sand, the steel cable tower 2 extends out of the sand, and surface sand-fixing vegetation 14 is planted on the sand under the suspended canopy.

[0035] See Figure 5 When the high-polymer weather-resistant semi-permeable membrane 12 is selected as a high-polymer weather-resistant high-reflection low-transmittance membrane, direct sunlight 15 shines on the upper surface of the high-polymer weather-resistant semi-permeable membrane 12. Most of the energy of the direct sunlight 15 is reflected into the air in the form of membrane surface reflected light 16, and a smaller portion of the energy is radiated to the surface sand-fixing vegetation 14 below in the form of transmitted light 17. The surface water vapor 18 generated by the surface sand-fixing vegetation 14 directly below the suspended covering canopy is blocked and intercepted by the suspended covering canopy directly above. Some of the surface water vapor 18 condenses on the lower surface of the high-polymer weather-resistant semi-permeable membrane 12, forming water droplets 19. (The text also mentions a steel wire rope mesh, but this seems unrelated to the main topic and is likely a separate sentence fragment.) The horizontal and vertical grids of 11 serve to adsorb and restrict the flow range of water droplets 19. When the water droplets 19 accumulate to a certain extent, they will form condensate 20 and drip back onto the surface sand-fixing vegetation 14. The gap between the edge of the suspended canopy and the surface sand-fixing vegetation 14 and the ventilation holes 13 in the center allow for air circulation 21 and airflow 22 in the lower space of the canopy. At the same time, both sides of the vertical bifacial photovoltaic array unit can receive direct sunlight 15, diffused light 23 from the sky, diffused light 24 from the surface of the polymer weather-resistant semi-permeable membrane 12, and reflected light 16 from the surface of the membrane, thereby absorbing light energy to generate electricity.

[0036] See Figure 6The high-polymer weather-resistant semi-permeable membrane 12 is a high-polymer weather-resistant medium-diffuse semi-permeable membrane. Most of the energy of the direct sunlight 15 emitted by the sun is radiated to the sand-fixing vegetation 14 below in the form of transmitted light 17, which is absorbed by the sand-fixing vegetation 14 for growth. The remaining energy is transformed into weakened diffuse reflected light 24 from the membrane surface and radiated into the air or onto the surface of the vertical bifacial photovoltaic array unit.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A photovoltaic sand-stabilizing power-generating device, characterized by: The invention discloses a vertical double-sided power generation photovoltaic array unit and a suspension type covering canopy. Each vertical double-sided power generation photovoltaic array unit comprises two tower foundations, two cable towers, a steel cable type photovoltaic flexible support and a set of double-sided photovoltaic arrays, the two tower foundations are arranged side by side with a spacing therebetween, the bottom ends of the two cable towers are fixedly connected to the corresponding tower foundations, the two ends of the steel cable type photovoltaic flexible support are connected to the two cable towers to form a vertical support structure, and the set of double-sided photovoltaic arrays are vertically arranged and connected to the steel cable type photovoltaic flexible support. The at least two vertical double-sided power generation photovoltaic array units are arranged side by side, the shortest horizontal line between two adjacent vertical double-sided power generation photovoltaic array units is perpendicular to the shortest horizontal line between the two tower foundations of the vertical double-sided power generation photovoltaic array unit, and one corresponding suspension type covering canopy is connected between the two adjacent vertical double-sided power generation photovoltaic array units. Each suspension type covering canopy comprises a central hanging plate, four hanging plate pull ropes, a steel wire rope grid and a high polymer weather-resistant semi-permeable membrane, the high polymer weather-resistant semi-permeable membrane is covered and fixedly connected to the upper surface of the steel wire rope grid, the four corners of the steel wire rope grid are respectively connected to the bottom ends of the four cable towers of the adjacent two vertical double-sided power generation photovoltaic array units, the central hanging plate is fixedly connected to the center position of the high polymer weather-resistant semi-permeable membrane, the inner ends of the four hanging plate pull ropes are respectively connected to the four corners of the central hanging plate, and the outer ends of the four hanging plate pull ropes are respectively connected to the top ends of the four cable towers of the adjacent two vertical double-sided power generation photovoltaic array units, so that the central position of the high polymer weather-resistant semi-permeable membrane connected to the steel wire rope grid is higher than the horizontal height of the bottom end of the cable tower, and the high polymer weather-resistant semi-permeable membrane connected to the steel wire rope grid forms an arched covering structure.

2. The photovoltaic sand control power generation device according to claim 1, characterized in that: The steel cable type photovoltaic flexible support is a grid-shaped flexible steel cable, each double-sided photovoltaic module of the double-sided photovoltaic array is positioned and connected in a corresponding grid of the steel cable type photovoltaic flexible support, and the two ends of each flexible steel cable of the steel cable type photovoltaic flexible support are locked and connected to the cable tower through a corresponding steel cable tensioning lock.

3. The photovoltaic sand control power generation device according to claim 2, characterized in that: A plurality of stay cables are connected to the two cable towers of each vertical double-sided power generation photovoltaic array unit, the top ends of the plurality of stay cables are respectively connected to a plurality of steel cable tensioning locks of the corresponding cable tower, and the bottom ends of the plurality of stay cables are connected to the top surface of the corresponding tower foundation.

4. The photovoltaic sand control power generation device according to claim 1, characterized in that: The double-sided photovoltaic array is a photovoltaic array composed of double-sided back contact silicon heterojunction photovoltaic modules.

5. The photovoltaic sand control power generation device according to claim 1, characterized in that: A mounting hole is arranged at the center position of the high polymer weather-resistant reflective film, the central hanging plate is horizontally arranged and fixedly connected in the mounting hole of the high polymer weather-resistant semi-permeable membrane, and a plurality of ventilation holes are formed between the edge portion of the central hanging plate and the hole wall of the mounting hole.

6. The photovoltaic sand control power generation device according to claim 1, characterized in that: Each vertical double-sided power generation photovoltaic array unit further comprises a photovoltaic inverter and a power distribution electrical cabinet, the photovoltaic inverter and the power distribution electrical cabinet are arranged on the top surface of one of the tower foundations, and the set of double-sided photovoltaic arrays are connected to the photovoltaic inverter and the power distribution electrical cabinet.

7. The photovoltaic sand control power generation device according to claim 1, characterized in that: The high-molecular weather-resistant semi-permeable membrane is selected from a high-molecular weather-resistant high-reflective low-transmittance membrane or a high-molecular weather-resistant medium-diffuse reflective semi-permeable membrane.

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