Ultra-large-span flexible photovoltaic support system and installation method therefor

Abstract

An ultra-large-span flexible photovoltaic support system and an installation method therefor, the ultra-large-span flexible photovoltaic support system comprising support columns (1) and connecting suspension cables (2) fitted across the support columns (1), wherein the support columns (1) are symmetrically arranged along the center of a crossing area, at least two support columns (1) being provided at a single side of the crossing area, the support columns (1) are provided with winches (4) for tensioning the connecting suspension cables (2), and photovoltaic modules (5) are provided between adjacent connecting suspension cables (2); support stay cables (6) are provided between the support columns (1) and the ground, and auxiliary stay cables (7) are provided between the support columns (1) and the connecting suspension cables (2); and the support columns (1) are each obliquely inserted into the ground at a predetermined angle and to a predetermined depth. By means of the present method, flexible support for modules in a photovoltaic power generation system with an ultra-large span greater than 100 meters can be realized, filling the gap in the application of photovoltaic power generation in landfill sites, valleys, etc., within the settlement period.

Description

A super-large span photovoltaic flexible support system and its installation method Technical Field

[0001] The present invention relates to the field of photovoltaic technology, and in particular to an ultra-large-span photovoltaic flexible support system and an installation method thereof. Background Art

[0002] Photovoltaic power generation has become a strategic, low-carbon, green, and emerging industry in my country in recent years. With the continued support and promotion of national new energy policies, the pace of project implementation and development has continued to accelerate. Traditional photovoltaic module installation typically utilizes a lower foundation or pressed blocks for rooting, and upper photovoltaic supporting metal mounting brackets. This installation method has high requirements for topography, landforms, and geology, making it difficult to meet the installation requirements in complex conditions such as steep terrain, soft and deformed geology, or water-related geological conditions.

[0003] The existing flexible photovoltaic support system adopts a rigid structure fixing point at both ends and a tensioned prestressed steel strand or steel wire rope to support the photovoltaic panel in the middle, which can achieve Span photovoltaic flexible support installation (Li Chengzhi, Structural design and engineering application of flexible photovoltaic support system, Construction Technology. 2021, 52(09): 1120-1122).

[0004] However, for small lakes, valleys, closed landfill areas and other application scenarios, The photovoltaic flexible support system with a large span is far from meeting the needs. Taking the landfill in the settlement period as an example, based on the increasingly stringent environmental protection requirements in recent years, the vertical bottom and surface of the landfill are covered with HDPE film (high-density polyethylene film) to prevent the bottom garbage leachate from polluting the groundwater and the top methane from polluting the air. The photovoltaic fixed bracket installation form cannot be used in this scenario because it cannot take root effectively; at the same time, the width of the landfill often reaches hundreds of meters or even wider, and the existing photovoltaic flexible support installation cannot meet the needs. The above reasons are also the crux of the fact that there are currently no photovoltaic application cases in landfills in the settlement period at home and abroad. Therefore, it is imperative to develop an ultra-large span photovoltaic flexible support system and its standardized recommended installation method.

[0005] Summary of the Invention

[0006] The purpose of the present invention is to provide an ultra-large span photovoltaic flexible support system and its installation method to address the above-mentioned shortcomings, thereby solving the problem that the photovoltaic flexible support system in the prior art cannot be applied to small lakes, valleys, and closed landfill areas.

[0007] The present invention is achieved through the following solutions:

[0008] A super-large span photovoltaic flexible support system comprises support columns and connecting cables spanning the support columns; the support columns are symmetrically arranged along the center of the area to be crossed, and at least two support columns are arranged on a single side of the area to be crossed; the support columns are provided with hinges for pulling the connecting cables, and photovoltaic modules are arranged between adjacent connecting cables; supporting inclined cables are arranged between the support columns and the ground, and auxiliary inclined cables are arranged between the support columns and the connecting cables; the support columns are obliquely inserted into a predetermined depth at a predetermined angle to the ground.

[0009] Based on the structure of the above-mentioned ultra-large span photovoltaic flexible support system, steel cable tighteners are provided at the connections between the connecting cables, supporting inclined cables, auxiliary inclined cables and support columns.

[0010] Based on the structure of the above-mentioned ultra-large span photovoltaic flexible support system, the photovoltaic assembly includes photovoltaic units arranged in sequence along the length direction of the connecting cable, connecting cables are arranged between the photovoltaic units, and each photovoltaic unit is provided with at least two photovoltaic frames and photovoltaic panels arranged in the photovoltaic frames. The photovoltaic frames are provided with U-shaped grooves matching the size of the connecting cables.

[0011] Based on the structure of the above-mentioned ultra-large span photovoltaic flexible support system, the photovoltaic frame includes an upper frame, a lower frame and a locking piece; the locking piece is arranged in multiple numbers along the length direction of the photovoltaic frame; the locking piece includes a connecting buckle, a locking buckle base plate, a supporting cavity, a wrench and a locking ring; the locking buckle base plate is fixedly connected to the end face of the lower frame, the supporting cavity is arranged on the locking buckle base plate, the wrench is hinged in the supporting cavity, and the locking ring is hinged to the wrench; the size of the locking ring is not larger than the size of the connecting buckle.

[0012] Based on the structure of the above-mentioned ultra-large span photovoltaic flexible support system, the U-shaped groove is arranged on the end surface of the lower frame close to the upper frame, and the U-shaped groove is arranged along the length direction of the lower frame.

[0013] Based on the structure of the above-mentioned ultra-large span photovoltaic flexible support system, the cross-sections of the upper frame and the lower frame are both "L"-shaped structures, and a buffer layer is provided on the contact parts of the upper frame, the lower frame and the photovoltaic panel.

[0014] The present invention also discloses a method for installing an ultra-large span photovoltaic flexible support system, which comprises the following steps:

[0015] Step 1: Pile driving. Calculate the specifications and inclination angles of the support columns using the relevant calculation methods for support columns; calculate the tension value and number of support cables using the relevant calculation methods for support cables; and set the number and angle of auxiliary cables. Select an area with good geological and topographic conditions and assemble the support columns and support cables according to the previous method.

[0016] Step 2: Build the support system. Connect the auxiliary inclined cable on one side to the support column and connecting cable on the same side. Then, transfer the connecting cable from the support column at one end to the support column at the other end. By synchronously rotating the capstan on the same side, the adjacent connecting cables move synchronously. A release operation platform is set at the support column at one end; a receiving operation platform is set at the support column on the opposite side.

[0017] Step three, progressive lock-distributed sliding installation, assemble photovoltaic units between adjacent connecting cables, assemble connecting cables behind adjacent photovoltaic units to form a stable unit structure, assemble a predetermined number of photovoltaic frames and rubber spacers in the photovoltaic units; after assembling the predetermined number, synchronously rotate the hinge on the opposite support column to move the connecting cables along their length direction to reserve space for the next photovoltaic unit assembly; repeat this cycle until all photovoltaic units are assembled.

[0018] The tension value and arrangement quantity of the supporting inclined cables are calculated by the following method:

[0019] The input parameters for calculating the tension value of the supporting inclined cable are: the photovoltaic panel load on the connecting cable, the length of the connecting cable, and the angle between the supporting inclined cable and the horizontal connecting cable. The calculation formula is as follows: T = (P * L) / sinθ

[0020] Wherein, T is the tension value of the supporting inclined cable, P is the load of the photovoltaic panel connected to the suspension cable, L is the length of the suspension cable, and θ is the angle between the supporting inclined cable and the suspension cable.

[0021] The tension value of the supporting inclined cable is the type of inclined cable. If necessary, the angle between the supporting inclined cable and the connecting suspension cable can be adjusted to reduce the tension value of the inclined cable.

[0022] Alternatively, multiple stay cables can be arranged to disperse the force. The number of connecting cables can be calculated as follows: n = L / S

[0023] Where n is the number of connecting cables, L is the length of the connecting cables, and s is the spacing between the connecting cables.

[0024] The support column specifications and inclination angles are calculated using the following method:

[0025] The steel column specifications of the supporting tower are calculated as follows: H = (T * L) / (2 * K * sinθ)

[0026] Where H is the height of the support column, T is the cable force of the support cable, L is the length of the connecting cable, K is the stiffness of the support column, and θ is the angle between the support cable and the connecting cable.

[0027] The anchoring force design of the supporting cable of the support column is calculated by the following formula: F=T*μ

[0028] Where F is the anchoring force, T is the cable force supporting the stay cable, and μ is the anchoring coefficient.

[0029] The operators only need to work on the releasing and receiving operation platforms to complete the assembly of the photovoltaic units connected to the suspension cables.

[0030] Specifically, perform the following operations on the release operation platform:

[0031] 1) Pass the suspension cable through the U-shaped grooves at both ends of the photovoltaic frame. Install a connecting cable between every 1 to 3 photovoltaic frames. Install rubber spacers between photovoltaic frames to absorb the deformation or wind load vibration of each photovoltaic panel. Finally, lock the buckle of the lock and install the next photovoltaic panel in a cycle.

[0032] 4) The auxiliary inclined cables are gradually released. The ones on the left side are placed at the tail end and fixed to the fixed adjustment point on the support column; the auxiliary inclined cables on the right side are fixed to the connecting cables in advance and transported to the right side along with the cables.

[0033] 5) After installation, adjust the fixed adjustment point of the suspension cable on the steel column to the appropriate stress state.

[0034] Perform the following operations on the receiving operation platform:

[0035] 1) Gradually accepted "extra" connecting cables;

[0036] 2) When the "right auxiliary inclined cable" conveyed along with the suspension cable is delivered to the vicinity of the "receiving operation platform", it is caught and hung on the fixed adjustment point on the support column;

[0037] 3) After installation, adjust the fixed adjustment point of the auxiliary inclined cable on the support column to the appropriate stress state.

[0038] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0039] 1. This method can realize flexible support of photovoltaic power generation system components with a span of more than 100 meters, filling the gap in photovoltaic power generation applications in landfills, valleys, etc. during the settlement period;

[0040] 2. For complex terrain, landforms and geology, installers do not need to enter the above areas. They can quickly install by using a progressive lock-distributed sliding installation method at the fixed point operation areas at both ends;

[0041] 3. The fixed points at both ends are equipped with steel strands or wire rope adjustment devices, which can adjust the downward tension according to the stress conditions, increasing the safety of the photovoltaic flexible support and also improving the power generation efficiency by increasing the horizontal angle of the photovoltaic modules;

[0042] 4. Easy to install, can shorten the construction period and save costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] FIG1 is a schematic diagram of the main structure of the present invention as a whole;

[0044] FIG2 is a schematic diagram of the overall top view of the present invention;

[0045] FIG3 is a schematic diagram of the main structure of the photovoltaic frame of the present invention;

[0046] FIG4 is a schematic side view of the photovoltaic frame of the present invention;

[0047] FIG5 is a schematic diagram of the installation process of the present invention;

[0048] Markings in the figure: 1. Support column; 2. Connecting cable; 3. Area to be crossed; 4. Winch; 5. Photovoltaic module; 6. Supporting inclined cable; 7. Auxiliary inclined cable; 8. Cable tensioner; 9. Rubber separator; 10. Release operation platform; 11. Receiving operation platform; 51. Photovoltaic unit; 52. Connecting cable; 53. Photovoltaic frame; 54. Photovoltaic panel; 55. U-shaped groove; 531. Upper frame; 532. Lower frame; 533. Connecting buckle; 534. Locking buckle base plate; 535. Support cavity; 536. Wrench; 537. Locking ring; 538. Buffer layer. DETAILED DESCRIPTION

[0049] All features disclosed in this specification, or all steps in the disclosed methods or processes, except mutually exclusive features and / or steps, can be combined in any manner.

[0050] Any feature disclosed in this specification (including any appended claims and abstract), unless otherwise stated, may be replaced by other equivalent or similar features. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0051] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a predetermined direction, be constructed and operated in a predetermined direction, and therefore cannot be understood as a limitation on the present invention.

[0052] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features being referred to. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of such features.

[0053] Example 1

[0054] As shown in Figures 1 to 4, the present invention provides a technical solution:

[0055] A super-large span photovoltaic flexible support system, which at least includes but is not limited to a support column 1 and a connecting cable 2 spanning the support column 1; the support column 1 is symmetrically arranged along the center of the area to be crossed 3, and at least two support columns 1 are arranged on a single side of the area to be crossed 3, and a hinge 4 for pulling the connecting cable 2 is provided on the support column 1, and photovoltaic modules 5 are provided between adjacent connecting cables 2; a supporting inclined cable 6 is provided between the support column 1 and the ground, and an auxiliary inclined cable 7 is provided between the support column 1 and the connecting cable 2; the support column 1 is obliquely inserted into a predetermined depth at a predetermined angle to the ground.

[0056] Based on the above structure, this solution provides support for the connecting cables 2 by setting up pairs of mutually oblique supporting columns 1, and at the same time cooperates with the supporting inclined cables 6 to ensure that they can support the photovoltaic components 5 with sufficient tension. Traditional photovoltaic support systems are often limited by the terrain, while the new flexible photovoltaic support system is not restricted by the site and is widely used in photovoltaic projects. One of the major disadvantages of the cable structure is its poor stability and poor wind resistance (Li Xiaocheng, Zhang Yingying, Zhou Yi, et al., A Review of Research on Flexible Photovoltaic Support Structures, Civil Engineering, 2023, 12(3), 290-297). Therefore, the existing flexible photovoltaic support system can only achieve For the installation of photovoltaic flexible supports with large spans, this scheme draws on the structural form of cable-stayed bridges and integrates the progressive step-by-step sliding installation form of large-span steel structure grid roof, so that it can provide stable support in large-span areas.

[0057] This solution employs prestressed steel cables stretched between fixed points at both ends. These fixed points utilize rigid steel columns and externally inclined steel strands to provide support reaction forces. Horizontal cables at the same end provide horizontal stabilization for the two steel columns on the same side. Four steel columns installed obliquely in the soil-bearing layer, along with additional steel column-stayed cables and horizontal cables, form a stable mechanical system that meets the rooting requirements of ultra-long-span photovoltaic flexible supports.

[0058] As an example, a steel cable tightener 8 may be provided at the connection points between the connecting cables 2 , the supporting inclined cables 6 , the auxiliary inclined cables 7 and the supporting columns 1 .

[0059] Based on the above structure, the tension of the steel rope can be adjusted through the steel cable tensioner 8. The connecting cables 2, supporting inclined cables 6 and auxiliary inclined cables 7 will become loose over time, resulting in a decrease in the overall support strength. The steel cable tensioner 8 can be used to regularly tension the support system during maintenance to ensure overall stability. The steel cable tensioner 8 is an existing structure and is not specifically limited in this solution. Any structure that can adjust the tension of the steel cable can be used.

[0060] As an example, the photovoltaic assembly 5 may include photovoltaic units 51 arranged in sequence along the length direction of the connecting cable 2, with connecting cables 52 provided between the photovoltaic units 51. The photovoltaic units 51 are separated into independent modules by the connecting cables 52. Each photovoltaic unit 51 is provided with at least two photovoltaic frames 53 and photovoltaic panels 54 provided in the photovoltaic frames 53. The photovoltaic frames 53 are provided with U-shaped grooves 55 that match the size of the connecting cables 2.

[0061] Based on the above structure, the photovoltaic units 51 are separated by connecting ropes 52, and the sides of the photovoltaic units 51 are fixed to the connecting suspension ropes 2 through U-shaped grooves 55, thereby forming a rectangular unit structure. This can increase the resistance of the photovoltaic units 51 to external interference, enable the photovoltaic units 51 to always maintain a predetermined working state, and reduce the difficulty of subsequent maintenance.

[0062] As an example, the photovoltaic frame 53 may include an upper frame 531, a lower frame 532 and a locking piece; the locking piece is arranged in multiple numbers along the length direction of the photovoltaic frame 53; the locking piece may include a connecting buckle 533, a locking base plate 534, a support cavity 535, a wrench 536 and a locking ring 537; the locking base plate 534 is fixedly connected to the end face of the lower frame 532, the support cavity 535 is arranged on the locking base plate 534, the wrench 536 is hinged in the support cavity 535, and the locking ring 537 is hinged to the wrench 536; the size of the locking ring 537 is not larger than the size of the connecting buckle 533, so that the locking ring can be stuck in the connecting buckle 533 for locking.

[0063] Based on the above structure, by turning the wrench 536, the state of the locking ring 537 and the connecting buckle 533 can be locked or unlocked, so that the upper frame 531 and the lower frame 532 are connected as a whole or loosened.

[0064] As an example, the U-shaped groove 55 is provided on an end surface of the lower frame 532 close to the upper frame 531 , and the U-shaped groove 55 is provided along the length direction of the lower frame 532 .

[0065] Based on the above structure, when assembling the photovoltaic frame 53, the connecting cable 2 is passed through the U-shaped groove 55, and then the locking piece is buckled down to connect the connecting cable 2, the upper frame 531, and the lower frame 532 as one. On the one hand, the U-shaped groove 55 can increase the contact area with the connecting cable 2 to ensure the connection strength. On the other hand, it can enable the photovoltaic frame 53 to slide a certain distance along the length direction of the connecting cable 2, thereby simplifying the assembly process.

[0066] As an example, the cross-sections of the upper frame 531 and the lower frame 532 are both "L"-shaped structures, and a buffer layer 538 is provided on the contact parts of the upper frame 531, the lower frame 532 and the photovoltaic panel 54; the buffer layer 538 can be a flexible rubber pad.

[0067] The upper frame 531 and the lower frame 532 are evenly arranged along the four sides of the photovoltaic panel 54 .

[0068] Based on the above structure, by providing the buffer layer 538 , it is possible to prevent the upper frame 531 and the lower frame 532 from causing damage to the photovoltaic panel 54 when being locked.

[0069] This solution uses locks installed on the upper and lower parts of the square metal frame to clamp the four edges of the solar photovoltaic panel 54 through the upper and lower square metal frames, thereby securing and supporting the photovoltaic panel 54 and distributing the load of the photovoltaic panel 54. When in use, the buckle on the lower part of the lock closes the U-shaped groove 55 through which the suspension cable passes, achieving safe and quick installation.

[0070] As an example, the tension value and arrangement quantity of the supporting inclined cables 6 in this solution are calculated by the following method:

[0071] The input parameters for calculating the tension value of the supporting inclined cable 6 are: the load of the photovoltaic panel 54 on the connecting cable 2, the length of the connecting cable 2, and the angle between the supporting inclined cable 6 and the horizontal connecting cable 2. The calculation formula is as follows: T = (P * L) / sinθ

[0072] Wherein, T is the tension value of the supporting inclined cable 6, P is the load of the photovoltaic panel 54 connected to the suspension cable 2, L is the length of the suspension cable 2, and θ is the angle between the supporting inclined cable 6 and the suspension cable 2;

[0073] The tension value of the supporting inclined cable 6 is the type of inclined cable. If necessary, the angle between the supporting inclined cable 6 and the connecting cable 2 can be adjusted to reduce the tension value of the inclined cable.

[0074] Alternatively, multiple stay cables can be arranged to disperse the force. The number of connecting cables 2 can be calculated as follows: n = L / S

[0075] Wherein, n is the number of connecting cables 2, L is the length of the connecting cables 2, and s is the spacing between the connecting cables 2.

[0076] As an example, the specifications and inclination angle of the support column 1 in this solution are calculated using the following method:

[0077] The specifications and inclination angle of support column 1 are calculated using the following method:

[0078] The steel column specifications of the supporting tower are calculated as follows: H = (T * L) / (2 * K * sinθ)

[0079] Wherein, H is the height of the support column 1, T is the cable force of the support cable 6, L is the length of the connecting cable 2, K is the stiffness of the support column 1, and θ is the angle between the support cable 6 and the connecting cable 2;

[0080] The anchoring force design of the supporting cable 6 of the support column 1 is calculated by the following formula: F=T*μ

[0081] Wherein, F is the anchoring force, T is the cable force supporting the stay cable 6, and μ is the anchoring coefficient.

[0082] The inclination angle of the steel column of the support tower is a high-order statically indeterminate structural problem; it can be determined by software calculation in accordance with the "Design Specifications for Highway Cable-Stayed Bridges" (JTG / T3365-01-2020) (Design Specifications for Highway Cable-Stayed Bridges, a book published by China Merchants Chongqing Communications Research and Design Institute Co., Ltd. and People's Communications Press, 2020).

[0083] Example 2

[0084] As shown in Figure 5, the present invention provides a technical solution:

[0085] A method for installing an ultra-large-span photovoltaic flexible support system comprises the following steps:

[0086] Step 1: Pile driving. Calculate the specifications and inclination angle of support column 1 using the relevant calculation method of support column 1; calculate the tension value and arrangement quantity of support inclined cables 6 using the relevant calculation method of support inclined cables 6; and set the number and angle of auxiliary inclined cables 7. Select an area with good geological and topographic conditions and assemble support column 1 and support inclined cables 6 according to the previous method.

[0087] Specifically, each set of ultra-large span photovoltaic flexible support systems requires four oblique support columns 1, and four support columns 1 are installed (two support columns 1 on each side); the depth and specifications of the support columns 1 are calculated based on geological survey conditions and support system stress analysis;

[0088] This solution employs two prestressed connecting cables, tensioned between fixed points at both ends. These fixed points utilize rigid steel columns and externally inclined steel strands to provide support reaction forces. Horizontal cables at the same end provide horizontal stabilization forces for the two steel columns on the same side. Four steel columns installed obliquely in the soil bearing layer, along with additional steel column-stayed cables and horizontal cables, form a stable mechanical system that meets the rooting force requirements of ultra-long-span photovoltaic flexible supports.

[0089] Step 2: Build the support system. Connect the auxiliary inclined cable 7 on one side to the support column 1 and the connecting cable 2 on the same side. Then, transfer the connecting cable 2 from the support column 1 at one end to the support column 1 at the other end. The adjacent connecting cables 2 are moved synchronously by rotating the capstan 4 on the same side. A release operation platform 10 is provided at the support column 1 at one end; a receiving operation platform 11 is provided at the support column 1 on the opposite side.

[0090] Step three, progressive lock-distributed sliding installation, assemble photovoltaic units 51 between adjacent connecting cables 2, assemble connecting cables 52 behind adjacent photovoltaic units 51 to form a stable unit structure, assemble a predetermined number of photovoltaic frames 53 and rubber spacers 9 in the photovoltaic units 51; after assembling the predetermined number, synchronously rotate the hinge 4 on the opposite support column 1 to move the connecting cables 2 along its length direction to reserve space for the assembly of the next photovoltaic unit 51; repeat this cycle until all photovoltaic units 51 are assembled.

[0091] In this solution, the operator only needs to work on the releasing operation platform 10 and the receiving operation platform 11 to complete the assembly of the photovoltaic unit 51 on the entire connecting cable 2.

[0092] Specifically, perform the following operations on the release operation platform 10:

[0093] 1) Pass the suspension cable through the U-shaped grooves 55 at both ends of the photovoltaic frame 53. Install a connecting cable 52 between every 1-3 photovoltaic frames 53. Install rubber spacers 9 between the photovoltaic frames 53 to absorb the deformation or wind load vibration of each photovoltaic panel 54. Finally, lock the buckle and install the next photovoltaic panel 54 in the cycle.

[0094] 6) The auxiliary inclined cables 7 are gradually released. The one on the left is placed at the tail end and fixed to the fixed adjustment point on the support column 1. The auxiliary inclined cables 7 on the right are fixed to the connecting cables 2 in advance and transported to the right side along with the cables.

[0095] 7) After installation, adjust the fixed adjustment point of the suspension cable on the steel column to the appropriate stress state.

[0096] Specifically, perform the following operations on the receiving operation platform:

[0097] 1) Gradually accepted "extra" connecting cables 2;

[0098] 2) The "right auxiliary inclined cable 7" conveyed along with the suspension cable is delivered to the vicinity of the "receiving operation platform" and is caught and hung on the fixed adjustment point on the support column 1;

[0099] 3) After installation, adjust the fixed adjustment point of the auxiliary inclined cable 7 on the support column 1 to a suitable stress state.

[0100] Through this method, 1. flexible support of photovoltaic power generation system components with ultra-large spans of more than 100 meters can be achieved, filling the gaps in photovoltaic power generation applications in landfills, valleys, etc. during the settlement period; 2. For complex terrain, landforms and geology, installers do not need to enter the above-mentioned areas, and can quickly install them by using a progressive lock-distributed sliding installation method in the operation areas of the fixed points at both ends; 3. Steel strands or wire rope adjustment devices are provided at the fixed points at both ends, which can adjust the downward tension according to the stress conditions, thereby increasing the safety of the photovoltaic flexible support and also improving the power generation efficiency by increasing the horizontal angle of the photovoltaic components 5; 4. It is easy to install, can shorten the construction period, and save costs.

[0101] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An ultra-large span photovoltaic flexible support system, characterized in that: It includes support columns and connecting cables that cross the support columns; the support columns are symmetrically arranged along the center of the area to be crossed, at least two support columns are arranged on a single side of the area to be crossed, the support columns are provided with hinges for pulling the connecting cables, and photovoltaic components are arranged between adjacent connecting cables; supporting inclined cables are arranged between the support columns and the ground, and auxiliary inclined cables are arranged between the support columns and the connecting cables; the support columns are obliquely inserted into a predetermined depth at a predetermined angle to the ground.

2. The ultra-large-span photovoltaic flexible support system according to claim 1, characterized in that: Steel cable tighteners are provided at the connection points between the connecting suspension cables, the supporting inclined cables, the auxiliary inclined cables and the supporting columns.

3. The ultra-large-span photovoltaic flexible support system according to claim 2, characterized in that: The photovoltaic assembly includes photovoltaic units arranged in sequence along the length direction of the connecting cable, connecting cables are arranged between the photovoltaic units, each photovoltaic unit is provided with at least two photovoltaic frames and photovoltaic panels arranged in the photovoltaic frames, and the photovoltaic frames are provided with U-shaped grooves matching the size of the connecting cables.

4. The ultra-large span photovoltaic flexible support system according to claim 3, characterized in that: The photovoltaic frame includes an upper frame, a lower frame and a locking piece; the locking piece is arranged in multiple numbers along the length direction of the photovoltaic frame; the locking piece includes a connecting buckle, a locking buckle base plate, a supporting cavity, a wrench and a locking ring; the locking buckle base plate is fixedly connected to the end face of the lower frame, the supporting cavity is arranged on the locking buckle base plate, the wrench is hinged in the supporting cavity, and the locking ring is hinged to the wrench; the size of the locking ring is not larger than the size of the connecting buckle.

5. The ultra-large-span photovoltaic flexible support system according to claim 4, characterized in that: The U-shaped groove is arranged on the end surface of the lower frame close to the upper frame, and the U-shaped groove is arranged along the length direction of the lower frame.

6. The ultra-large-span photovoltaic flexible support system according to claim 5, characterized in that: The cross-sections of the upper frame and the lower frame are both "L"-shaped structures, and a buffer layer is provided on the contact parts of the upper frame, the lower frame and the photovoltaic panel.

7. A method for installing an ultra-large span photovoltaic flexible support system, characterized in that: It includes the following steps: Step 1: Pile driving. Calculate the specifications and inclination angle of the support column by the relevant calculation method of the support column; calculate the tension value and arrangement quantity of the support cable by the relevant calculation method of the support cable; set the number and angle of the auxiliary cable at the same time; select an area with good geological and topographic conditions to assemble the support column and the support cable according to the previous method; Step 2: Building the support system; connect the auxiliary inclined cable on one side to the support column and the connecting cable on the side where it is located, and then transport the connecting cable from the support column at one end to the support column at the other end, and make the adjacent connecting cables move synchronously by synchronously rotating the capstan on the same side; a release operation platform is set at the support column at one end; and a receiving operation platform is set at the support column on the opposite side; Step three, progressive lock-distributed sliding installation, assemble photovoltaic units between adjacent connecting cables, assemble connecting cables behind adjacent photovoltaic units to form a stable unit structure, assemble a predetermined number of photovoltaic frames and rubber spacers in the photovoltaic units; after assembling the predetermined number, synchronously rotate the hinge on the opposite support column to move the connecting cables along their length direction to reserve space for the next photovoltaic unit assembly; repeat this cycle until all photovoltaic units are assembled.

8. The method for installing a super-large-span photovoltaic flexible support system according to claim 7, characterized in that: The tension value and arrangement quantity of the supporting inclined cables are calculated by the following method: The input parameters for calculating the tension value of the supporting inclined cable are: the load of the photovoltaic panel on the connecting cable, the length of the connecting cable, and the angle between the supporting inclined cable and the horizontal connecting cable. The calculation formula is as follows: T=(P*L) / sinθ Wherein, T is the tension value of the supporting inclined cable, P is the photovoltaic panel load of the connecting cable, L is the length of the connecting cable, and θ is the angle between the supporting inclined cable and the connecting cable; The tension value of the supporting inclined cable is the model of the inclined cable. If necessary, the angle between the supporting inclined cable and the connecting cable can be adjusted to reduce the tension value of the inclined cable; Alternatively, multiple inclined cables can be arranged to disperse the force. The number of connecting cables can be calculated as follows: n=L / S Wherein, n is the number of connecting cables, L is the length of the connecting cables, and s is the spacing between the connecting cables.

9. The method for installing a super-large-span photovoltaic flexible support system according to claim 8, characterized in that: The support column specifications and inclination angles are calculated using the following method: The steel column specifications of the supporting tower are calculated as follows: H=(T*L) / (2*K*sinθ) Wherein, H is the height of the support column, T is the cable force of the support cable, L is the length of the connecting cable, K is the stiffness of the support column, and θ is the angle between the support cable and the connecting cable; The anchorage force design of the supporting cable of the supporting column is calculated by the following formula: F=T*μ Among them, F is the anchoring force, T is the cable force supporting the inclined cable, and μ is the anchoring coefficient.

10. The method for installing a super-large-span photovoltaic flexible support system according to claim 9, characterized in that: The operators only need to work on the release operation platform and the receiving operation platform to complete the assembly of the photovoltaic units connected to the suspension cables. Specifically, perform the following operations on the release operation platform: 1) Pass the suspension cable through the U-shaped grooves at both ends of the photovoltaic frame, install a connecting cable between every 1-3 photovoltaic frames, install rubber spacers between photovoltaic frames to absorb the deformation or wind load vibration of each photovoltaic panel, and finally lock the buckle of the lock and install the next photovoltaic panel in a cycle; 2) The auxiliary inclined cables are gradually released. The ones on the left side are placed at the tail end and fixed to the fixed adjustment point on the support column; the auxiliary inclined cables on the right side are fixed on the connecting cables in advance and transported to the right side along with the cables); 3) After installation, adjust the fixed adjustment point of the suspension cable on the steel column to the appropriate stress state; Perform the following operations on the receiving operation platform: 1) Gradually accepted "extra" connecting cables; 2) When the "right auxiliary inclined cable" conveyed with the suspension cable is transported to the vicinity of the "receiving operation platform", it is caught and hung on the fixed adjustment point on the support column; 3) After installation, adjust the fixed adjustment point of the auxiliary inclined cable on the support column to the appropriate stress state.

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