A flexible support system for a photovoltaic installation adapted to a hillside terrain and a method of construction

Abstract

The application discloses a flexible support system and construction method of a photovoltaic device suitable for a mountain slope terrain, relates to the technical field of photovoltaic power generation equipment, and comprises photovoltaic supports arranged along the up-down direction of the mountain slope, cable frames, support frames and angle adjusting mechanisms. The photovoltaic supports comprise a plurality of oppositely arranged columns, the top ends of the columns on the two sides are fixedly provided with the cable frames, the cable frames comprise at least two steel strands arranged in parallel in the up-down direction, a plurality of photovoltaic support frames are arranged on the same side cable frame at intervals, the angle adjusting mechanisms are arranged between two oppositely arranged support frames, the angle adjusting mechanisms comprise rotating shafts and bearing seats, the bearing seats are fixed on the support frames, the end portions of the rotating shafts are rotatably connected with the bearing seats, and the rotating shafts are fixedly connected with photovoltaic panels. The application can finely correct the inclination angle of the photovoltaic panels, improves the power generation utilization efficiency of the photovoltaic components, increases the span between the photovoltaic panels, improves the overall construction efficiency, and reduces the operation and maintenance cost.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic power generation equipment technology, and in particular to a flexible support system and construction method for photovoltaic facilities suitable for hillside terrain. Background Technology

[0002] With the rapid scaling up and industrialization of the photovoltaic industry, high-quality construction land resources in plains areas are becoming increasingly scarce, and land scarcity has become a significant factor restricting the large-scale construction of photovoltaic power plants. Against this backdrop, complex terrains such as mountains, hills, and undulating slopes are gradually becoming core expansion scenarios for photovoltaic power plant development and construction. Traditional rigid photovoltaic supports have high requirements for site flatness and regularity. When adapting to complex mountain slope conditions, large-scale slope cutting and filling, site leveling, and slope reinforcement are required to meet construction conditions. This not only results in high overall construction costs and long construction periods but also completely destroys the original vegetation cover and soil structure of the mountain, easily leading to ecological disasters and safety hazards such as soil erosion and landslides. It is difficult to adapt to complex mountain construction scenarios with steep slopes, gullies, and large topographical differences, exhibiting significant shortcomings in terrain adaptability and green construction.

[0003] To address the numerous technical drawbacks of traditional rigid supports, a flexible support system for hillside photovoltaic systems has emerged, as shown in the attached figure. Figure 1 As shown, this system uses prestressed flexible cables as its core load-bearing structure. It has outstanding advantages such as strong terrain adaptability, small civil engineering disturbance, excellent ecological compatibility, and low overall cost. It does not require large-scale modification of the original mountain topography and can adapt to the natural slope and terrain elevation difference of the mountain. It effectively overcomes the defects of traditional rigid supports, such as poor terrain adaptability, serious ecological damage, and high construction difficulty. It can significantly improve the utilization rate of mountain land resources, broaden the application scenarios of photovoltaic engineering construction, and realize the green and efficient construction of mountain photovoltaics. It has gradually replaced traditional rigid supports and become the mainstream support form for mountain photovoltaic development.

[0004] However, the current mainstream flexible support systems for mountain photovoltaic systems still have many inherent technical defects, which seriously restrict the construction efficiency, operational stability, and ease of maintenance of mountain photovoltaic power stations. First, most existing flexible supports generally lack angle adjustment capabilities. The installation posture of the components is completely constrained by the mountain slope, and they can only be passively arranged according to the slope. They cannot optimize the posture according to the solar irradiance angle and terrain deviation, which significantly reduces the power generation efficiency of photovoltaic components and has extremely poor adaptability. Second, conventional flexible support schemes mostly adopt a planar steel cable single-point fixing structure for component installation. The support span design is relatively small, usually only 25-35 meters. To meet the requirements of component support and structural stability, a large number of steel pile foundations need to be laid. The overall pile foundation usage is large and the layout density is high. This not only significantly increases the on-site installation procedures and construction difficulty, reduces the overall construction efficiency, but also leads to a surge in the workload of later inspection, maintenance, and repair of the power station, resulting in high operation and maintenance costs. Third, most of the existing flexible supports for photovoltaic panels with adjustable angles used in plains adopt a drive structure in which a rotary reducer and a load-bearing steel cable rotate synchronously. During operation, the reducer will directly pull, twist, and rub the load-bearing steel cable, which can easily cause distortion of the steel cable under stress, increased wear, and imbalance of prestress. This seriously damages the structural strength and support stability of the steel cable, significantly reduces the overall load-bearing capacity and service life of the flexible support system, and poses a great safety hazard. Therefore, it cannot be applied to the installation of photovoltaic modules on hillsides. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this application provides a flexible support system and construction method for photovoltaic facilities.

[0006] The technical solution provided by this invention is as follows: A flexible support system for photovoltaic facilities suitable for hillside terrain includes a photovoltaic support frame, a steel cable frame, a photovoltaic panel support frame, and an angle adjustment mechanism. The photovoltaic brackets are arranged in groups, and each group of photovoltaic brackets includes two opposing columns. There are at least two groups of photovoltaic brackets from the top to the bottom of the hillside. A steel cable frame is installed between the tops of the columns on the same side. The steel cable frame includes at least two steel strands arranged in parallel vertically. The steel strands are tensioned. The steel cable frames on both sides of the top of each photovoltaic support are symmetrically arranged. Multiple steel strand support rods are provided between the parallel steel strands. Multiple photovoltaic panel support frames are erected between the steel strands of the steel cable frame on the same side. The photovoltaic panel support frames are fixedly connected to the steel strands inside the steel cable frame, and a photovoltaic panel is installed on each photovoltaic panel support frame. The angle adjustment mechanism includes a combined rotating shaft and a bearing seat. The bearing seat is mounted on the photovoltaic panel support frame, and the rotating shaft is connected to the photovoltaic panel to achieve angle adjustment.

[0007] In one embodiment, the support frame is an H-shaped support frame, including two vertical support plates arranged opposite each other, a horizontal support plate fixedly arranged between the two vertical support plates, and the vertical support plates are fixedly connected to the steel strands arranged parallel to each other on the same side. The bearing seat is fixedly arranged on the horizontal support plate.

[0008] In one embodiment, the cable frame includes two parallel steel strands arranged vertically. The upper side of the vertical support plate is fixedly connected to the upper steel strand, and the lower side of the vertical support plate is fixedly connected to the lower steel strand. Steel strand struts are spaced apart on the cable frame. The steel strand struts are vertically arranged, and the upper end of the steel strand strut is fixedly connected to the uppermost steel strand in the cable frame, while the lower end of the steel strand strut is fixedly connected to the lowermost steel strand in the cable frame.

[0009] In one embodiment, the rotating shaft is disposed on the lower surface of the photovoltaic panel, and the position where the rotating shaft is fixed to the photovoltaic panel is located on the transverse central axis of the photovoltaic panel.

[0010] In one embodiment, the angle adjustment mechanism further includes a drive motor and a control unit. The drive motor drives the rotating shaft to rotate, and the control unit outputs an output signal to the drive motor to control the angle of rotation of the rotating shaft.

[0011] In one embodiment, the control unit includes a main controller and sub-controllers, which are electrically linked. Each photovoltaic panel is equipped with a sub-controller, which controls the rotation angle of the rotating shaft below the corresponding photovoltaic panel. One main controller controls two to three sub-controllers.

[0012] In one embodiment, the angle adjustment mechanism further includes a solar tracker that sends a signal to a control unit, which adjusts the rotation angle of the photovoltaic panel according to the signal emitted by the solar tracker.

[0013] In one embodiment, the photovoltaic support further includes vertically arranged cement piers and cement blocks. The cement piers are fixed on the hillside, the columns are fixed on the top of the cement piers, the cement blocks are fixed at the bottom and top of the hillside, and diagonal braces are fixed between the cement blocks and the top of the columns. The tops of the opposing columns are fixedly connected by connecting rods.

[0014] This application also provides a method for constructing a flexible support system for photovoltaic facilities, which includes the following steps: The columns are fixed on the hillside on both sides. A steel cable frame is fixed between the tops of the adjacent columns. Multiple support frames are fixed at intervals between the steel strands of the steel cable frame on the same side. The support frames on the left and right sides of the steel cable frame are arranged opposite each other. An angle adjustment mechanism is fixed between the opposite support frames. The bearing seat in the angle adjustment mechanism is fixed on the support frame. The end of the rotating shaft is rotatably connected to the bearing seat. The rotating shaft is fixedly connected to the photovoltaic panel.

[0015] Compared with the prior art, this application has at least the following beneficial effects: The flexible support system in this application, through the cooperation of steel cable frames, support frames, and angle adjustment mechanisms, enables the photovoltaic panels in the hillside photovoltaic flexible support system to have adjustable tilt angles, thus overcoming the predicament that the installation posture of photovoltaic modules is completely restricted by the mountain slope in the prior art. In this application, a solar tracker is also set in the angle adjustment mechanism, which enables the photovoltaic panels on the hillside to optimize their posture according to the angle of solar irradiance and adjust the photovoltaic panels to the optimal angle according to seasonal changes, thereby improving the power generation efficiency of photovoltaic modules. The steel cable frame in this application includes multiple steel strands arranged in parallel on the vertical plane. Through the cooperation between the support frame and the steel cable frame, the bending stress of the steel cable frame is greatly reduced while ensuring the basic function of supporting the photovoltaic panels. This allows the span between the columns to reach about 50 meters, reduces the amount of pile foundation used in the flexible support system, reduces on-site installation procedures, reduces construction difficulty, improves overall construction efficiency, and also reduces operation and maintenance costs. This application achieves the adjustment of the tilt angle of photovoltaic panels by cooperating with the support frame and the angle adjustment mechanism while fixing the steel strands. This ensures the structural strength and support stability of the steel cable frame, improves the overall load-bearing capacity and service life of the flexible support system, and reduces the operational safety hazards of the flexible support system. In this application, through the setting of main control and sub-control, not only can the angles of multiple photovoltaic panels be centrally operated, but the angle of a single photovoltaic panel can also be adjusted individually, thereby realizing the fine-tuning of the angle of a single panel or local component. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a flexible support system for photovoltaic facilities on hillsides in the existing technology; Figure 2 This is a schematic diagram of the flexible support system of the photovoltaic facility in the embodiments of this application; Figure 3 This is a structural diagram of the H-shaped support frame and the angle condition mechanism. Figure 1 ; Figure 4 This is a schematic diagram of the control unit. Figure 2 ; Attached reference numerals: 00, photovoltaic panel; 01, hillside; 1, photovoltaic support frame; 11, column; 12, concrete block; 13, concrete block; 14, diagonal brace; 15, connecting rod; 2, steel cable frame; 21, steel strand; 23, steel strand support rod; 3, photovoltaic support frame; 31, vertical support plate; 32, horizontal support plate; 4, angle adjustment mechanism; 41, rotating shaft; 42, bearing seat; 5, control unit; 51, main control; 52, sub-control. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0018] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0019] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various information, such information should not be limited to these terms and should not be construed as indicating or implying relative importance. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0020] In the description of this invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to mechanical connection or internal connection between two components. They can be direct connection or indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0021] To better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.

[0022] This embodiment provides a flexible support system for photovoltaic facilities suitable for hillside terrain, as shown in the attached figure. Figure 2-4 As shown, it includes a photovoltaic bracket 1, a steel cable frame 2, a photovoltaic panel support frame 3, and an angle adjustment mechanism 4; The photovoltaic support system is set up in groups, and each group of photovoltaic support system includes two opposing columns 11. At least two groups of photovoltaic support systems 11 are set up from the top to the bottom of the hillside. A steel cable frame 2 is provided between the tops of the columns on the same side. The steel cable frame includes at least two steel strands 21 arranged in parallel vertically. The steel strands 21 are tensioned. The steel cable frames on both sides of the top of each photovoltaic support are symmetrically arranged. Multiple steel strand support rods 23 are provided between the parallel steel strands 21. Multiple photovoltaic panel support frames 3 are erected between the steel strands 21 of the steel cable frame 2 on the same side. The photovoltaic panel support frames are fixedly connected to the steel strands in the steel cable frame, and a photovoltaic panel is installed on each photovoltaic panel support frame. The angle adjustment mechanism 4 includes a combined rotating shaft 41 and a bearing seat 42. The bearing seat 42 is mounted on the photovoltaic panel support frame, and the rotating shaft 41 is connected to the photovoltaic panel to achieve angle adjustment.

[0023] The photovoltaic support frame 3 is an H-shaped support frame, including two vertically arranged support plates 31 arranged opposite each other, and a horizontal support plate 32 fixedly arranged between the two vertical support plates 31. The vertical support plates 31 are all fixedly connected to the parallel steel strands 21, and the bearing seat 42 is fixedly arranged on the horizontal support plate 32. In this embodiment, the cable frame 2 includes two parallel steel strands 21 arranged vertically. The upper side of the vertical support plate 31 is fixedly connected to the upper steel strand 21, and the lower side of the vertical support plate 31 is fixedly connected to the lower steel strand 21.

[0024] The rotating shaft 41 is disposed on the lower surface of the photovoltaic panel 00, and the position where the rotating shaft 41 is fixed to the photovoltaic panel is located on the transverse central axis of the photovoltaic panel. In this embodiment, the angle adjustment mechanism 4 also includes a drive motor and a control unit 5. The drive motor is used to drive the rotating shaft 41 to rotate, and the control unit 5 provides an output signal to the drive motor to control the rotation angle of the rotating shaft 41, thereby adjusting the rotation angle of the photovoltaic panel 00, realizing precise calibration of the tilt angle of the photovoltaic module, enabling the photovoltaic panel to optimize its attitude according to the solar irradiance angle and terrain deviation, and improving the power generation efficiency of the photovoltaic module.

[0025] The control unit 5 includes a main controller 51 and sub-controllers 52, which are electrically linked. Each photovoltaic panel 00 is equipped with a sub-controller 52, which controls the rotation angle of the lower rotating shaft 41 of the corresponding photovoltaic panel. One main controller 51 controls two to three sub-controllers. Through the configuration of the main controller 51 and sub-controllers 52, not only can the angles of multiple photovoltaic panels be centrally operated, but the angle of a single photovoltaic panel can also be adjusted individually, thereby achieving fine-grained angle correction for single panels or partial components.

[0026] The angle adjustment mechanism 4 also includes a solar tracker, which sends a signal to the control unit 5. The control unit 5 adjusts the rotation angle of the photovoltaic panel 00 according to the signal emitted by the solar tracker.

[0027] To increase the stability of the photovoltaic support structure installed on the hillside, the photovoltaic support structure 1 also includes vertically installed cement blocks 12 and cement blocks 13. The cement blocks 12 are fixed on the hillside, the columns 11 are fixed on the top of the cement blocks 12, and the cement blocks 13 are fixed at the foot and top of the hillside 01. A diagonal brace 14 is fixed between the cement blocks 13 and the top of the columns 11, and the tops of the opposing columns 11 are fixedly connected by connecting rods 15.

[0028] To improve the stability of the cable frame 2, multiple steel strand struts 23 are spaced apart on the same side of the cable frame 2 along the up-down direction of the hillside. The steel strand struts 23 are vertically arranged, with the top of the strut fixedly connected to the uppermost steel strand 21 in the cable frame 2, and the bottom of the strut fixedly connected to the lowermost steel strand 22 in the cable frame 2. All other steel strands on the same side of the cable frame 2 are fixedly connected to the struts 23.

[0029] The slope of the hillside is not constant from bottom to top. In order to adapt to hillsides with different slopes, the slope of the steel strand 21 between adjacent columns 11 in the vertical direction is equal to the slope of the hillside to which the columns are fixed.

[0030] This embodiment also provides a method for constructing a flexible support system for the above-mentioned photovoltaic facility, including the following steps: The columns 11 are fixed on the hillside on both sides. The tops of the adjacent columns 11 are fixed with steel cable frames 2. Multiple support frames 3 are fixed at intervals between the steel strands 21 of the steel cable frames 2 on the same side. The support frames 3 on the left and right sides of the steel cable frames are arranged opposite each other. An angle adjustment mechanism 4 is fixed between the opposite support frames 3. The bearing seat 42 in the angle adjustment mechanism 4 is fixed on the support frame 3. The end of the rotating shaft 41 is rotatably connected to the bearing seat 42. The rotating shaft 41 is fixedly connected to the photovoltaic panel 00.

[0031] The construction method in this embodiment also includes setting a drive motor, a control unit 5 and a solar tracker in the angle adjustment mechanism 4. The solar tracker is electrically connected to the control unit 5, and the control unit 5 is electrically connected to the drive motor. The drive motor drives the rotating shaft to rotate. The control unit 5 outputs a signal to the drive motor according to the signal 5 emitted by the solar tracker to control the rotation angle of the rotating shaft 41, thereby adjusting the rotation angle of the photovoltaic panel 00.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A flexible support system for photovoltaic facilities suitable for hillside terrain, characterized in that, It includes photovoltaic brackets, steel cable frames, photovoltaic panel support frames, and angle adjustment mechanisms. The photovoltaic brackets are arranged in groups, and each group of photovoltaic brackets includes two opposing columns. There are at least two groups of photovoltaic brackets from the top to the bottom of the hillside. A steel cable frame is installed between the tops of the columns on the same side. The steel cable frame includes at least two steel strands arranged in parallel vertically. The steel strands are tensioned. The steel cable frames on both sides of the top of each photovoltaic support are symmetrically arranged. Multiple steel strand support rods are provided between the parallel steel strands. Multiple photovoltaic panel support frames are erected between the steel strands of the steel cable frame on the same side. The photovoltaic panel support frames are fixedly connected to the steel strands inside the steel cable frame, and a photovoltaic panel is installed on each photovoltaic panel support frame. The angle adjustment mechanism includes a combined rotating shaft and a bearing seat. The bearing seat is mounted on the photovoltaic panel support frame, and the rotating shaft is connected to the photovoltaic panel to achieve angle adjustment.

2. The flexible support system according to claim 1, characterized in that, The photovoltaic panel support frame is an H-shaped support frame, including two vertical support plates arranged opposite each other, and a horizontal support plate fixedly arranged between the two vertical support plates. The vertical support plates are fixedly connected to the steel strands arranged parallel on the same side, and the bearing seats are fixedly arranged on the horizontal support plate.

3. The flexible support system according to claim 2, characterized in that, The cable frame includes two parallel steel strands, one above the other. The upper side of the vertical support plate is fixedly connected to the upper steel strand, and the lower side of the vertical support plate is fixedly connected to the lower steel strand. The steel strand support rod is vertically arranged, with its upper end fixedly connected to the uppermost steel strand in the cable frame and its lower end fixedly connected to the lowermost steel strand in the cable frame.

4. The flexible support system according to claim 1, characterized in that, The rotating shaft is located on the lower surface of the photovoltaic panel, and the position where the rotating shaft is fixed to the photovoltaic panel is on the horizontal central axis of the photovoltaic panel.

5. The flexible support system according to claim 1, characterized in that, The angle adjustment mechanism also includes a drive motor and a control unit. The drive motor is used to drive the rotating shaft to rotate, and the control unit outputs a signal to the drive motor to control the angle of rotation of the rotating shaft.

6. The flexible support system according to claim 6, characterized in that, The control unit includes a main controller and sub-controllers, which are electrically linked. Each photovoltaic panel is equipped with a sub-controller, which controls the rotation angle of the rotating shaft below the corresponding photovoltaic panel. One main controller controls two to three sub-controllers.

7. The flexible support system according to claim 6, characterized in that, The angle adjustment mechanism also includes a solar tracker, which sends a signal to the control unit, and the control unit adjusts the rotation angle of the photovoltaic panel according to the signal emitted by the solar tracker.

8. The flexible support system according to claim 1, characterized in that, The photovoltaic support also includes vertically arranged cement blocks and cement blocks. The cement blocks are fixed on the hillside, the columns are fixed on the top of the cement blocks, the cement blocks are fixed at the bottom and top of the hillside, and diagonal braces are fixed between the cement blocks and the top of the columns. The tops of the opposing columns are fixedly connected by connecting rods.

9. A method for constructing a flexible support system suitable for photovoltaic facilities on hillside terrain, characterized in that, The flexible support system for photovoltaic facilities as described in any one of claims 1-9 includes the following steps: The columns are fixed to the hillside on both sides. A steel cable frame is fixed between the tops of the adjacent columns. Multiple photovoltaic panel support frames are fixed at intervals between the steel strands of the steel cable frame on the same side. The support frames on the steel cable frames on the left and right sides are arranged opposite each other. An angle adjustment mechanism is fixed between the opposite support frames. The bearing seat in the angle adjustment mechanism is fixed on the support frame. The end of the rotating shaft is rotatably connected to the bearing seat. The rotating shaft is fixedly connected to the photovoltaic panel.

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