Flexible photovoltaic support system based on tensile cable structure and design method thereof

Abstract

The application provides a flexible photovoltaic support system based on a cable structure and a design method thereof. The flexible photovoltaic support system comprises a plurality of intersecting cable truss units, a plurality of support frames and a plurality of supports. Each cable truss unit comprises an upper layer cable unit and a lower layer cable unit. Each support frame is arranged at an intersection position of the intersecting cable truss units. Each support frame is connected to the upper layer cable unit and the lower layer cable unit of each corresponding intersecting cable truss unit. Each support is arranged at an end of a corresponding cable truss unit. The upper part of each support is connected to the upper layer cable unit and the lower layer cable unit of the corresponding cable truss unit. The lower part of each support is fixedly connected to the ground. The flexible photovoltaic support system has high bearing capacity, excellent wind resistance stability and low prestress loss, thereby improving the safety and economy of the flexible photovoltaic support system as a whole.

Description

Technical Field

[0001] This invention relates to the field of flexible photovoltaic support technology, and in particular to a flexible photovoltaic support system based on a tension cable structure and its design method. Background Technology

[0002] As the structural framework supporting photovoltaic (PV) modules, the photovoltaic (PV) support system must bear the weight of the modules while resisting natural forces such as wind, snow, and earthquakes. The core design principles of PV support systems emphasize safety, reliability, adaptability, and economy. Considering that PV support systems are often deployed in open areas such as Gobi Desert, deserts, and water surfaces, the system structure must possess strong crossing capabilities and be able to flexibly adapt to different terrains and deployment conditions.

[0003] Cable-stayed structures are a highly efficient structural system, with outstanding advantages in terms of economy and terrain adaptability, perfectly matching the performance requirements of photovoltaic (PV) support systems. This system utilizes the load-bearing capacity of pre-tensioned steel cables, fully leveraging material strength, reducing steel consumption by 30%-50% compared to traditional PV supports, thus significantly lowering material, transportation, and foundation construction costs. Flexible PV support systems based on cable-stayed structures possess large span capabilities, easily traversing complex terrains such as ravines and rivers, greatly minimizing damage to the original landscape. Furthermore, the ease of construction of flexible PV support systems based on cable-stayed structures provides flexible land use space for "photovoltaic+" projects such as "agricultural-photovoltaic integration" and "fishery-photovoltaic integration," achieving a harmonious balance between economic benefits and ecological sustainability.

[0004] Currently, common flexible photovoltaic support systems based on tensioned cable structures mainly include single-layer cable systems, double-layer cable systems, fish-belly cable truss systems, and tensioned beam systems. However, these systems generally have the following problems: (1) Single-layer cable systems have low vertical stiffness and significant deformation under gravity and wind loads, and are usually only suitable for small-span scenarios; (2) Double-layer cable systems improve the load-bearing capacity of gravity loads by setting curved load-bearing cables below the installation cables, but under the action of upward wind suction, the load-bearing cables are prone to failure, resulting in large upward deformation and poor wind suction resistance. (3) The fish-belly cable truss system adds an upwardly convex stabilizing cable on the basis of double-layer cable, which enhances the system's wind resistance. However, as the span increases, the load-bearing efficiency of the longitudinal cable decreases. In order to ensure the overall stiffness, a large pre-tension force needs to be applied, and the material consumption increases significantly. (4) The tensioned beam system adds a top steel beam and the lower load-bearing cable and stabilizing cable to the fish-belly cable truss to work together to control deformation and reduce the requirements for the anchoring nodes at both ends. However, the material consumption is large, the node structure is complex, and the continuous longitudinal steel beam makes transportation and on-site installation difficult.

[0005] Therefore, existing flexible photovoltaic support systems still have significant shortcomings in terms of large span, high stability, and efficient material utilization, making it difficult to meet the needs of large-scale applications under complex meteorological conditions and diverse terrains. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a flexible photovoltaic support system based on a tension cable structure and its design method, so as to alleviate the above-mentioned problems existing in the related technologies.

[0007] In a first aspect, embodiments of the present invention provide a flexible photovoltaic support system based on a tensioned cable structure, comprising: a plurality of intersecting cable truss units, each cable truss unit including an upper cable unit and a lower cable unit; a plurality of support frames, each support frame being disposed at the intersection of the intersecting cable truss units, each support frame being connected to the upper cable unit and the lower cable unit of the corresponding intersecting cable truss unit; and a plurality of supports, each support being disposed at the end of a corresponding cable truss unit, the upper part of each support being connected to the upper cable unit and the lower cable unit of the corresponding cable truss unit, and the lower part of each support being fixedly connected to the ground.

[0008] As one possible implementation, the intersecting cable truss elements are orthogonal in their projections onto the horizontal plane.

[0009] As one possible implementation, the plurality of cable truss units include a plurality of first cable trusses spaced apart along a first direction and a plurality of second cable trusses spaced apart along a second direction, wherein the first direction and the second direction are orthogonal in the same horizontal plane.

[0010] As one possible implementation, each of the support frames includes a crossbeam and a column, with each crossbeam of the same support frame connected to the upper end of each column of the same support frame; each crossbeam is connected to the upper cable unit of each cable truss unit to which it intersects, and the lower end of each column is connected to the lower cable unit of each cable truss unit to which it intersects.

[0011] As one possible implementation, each of the upper cable units includes at least two upper cables arranged in parallel; each of the support frames includes a plurality of crossbeams, the plurality of crossbeams of the same support frame are arranged intersectingly, and each crossbeam is connected to each of its corresponding upper cables.

[0012] As one possible implementation, each of the lower cable units includes at least one lower cable; each of the support frames includes at least one column, the upper end of each column of the same support frame is connected to each of the crossbeams of the same support frame, and the lower end of each column is connected to each of its corresponding lower cables.

[0013] As one possible implementation, each of the supports includes a horizontal member and a supporting member, with each of the horizontal members of the same support being connected to the upper end of each of the supporting members of the same support, and the lower end of each of the supporting members being fixedly connected to the ground.

[0014] As one possible implementation, each of the supports further includes an anchoring member; the supporting member includes a vertical member and / or a diagonal member; each of the horizontal members of the same support is respectively connected to the upper end of each of the vertical members of the same support and / or the upper end of each of the diagonal members, and the lower end of each of the vertical members and / or the lower end of each of the diagonal members is respectively fixedly connected to the ground through the corresponding anchoring member.

[0015] Secondly, embodiments of the present invention also provide a design method for a flexible photovoltaic support system based on a tensioned cable structure as described in the first aspect above, comprising: determining the stress conditions of each component of the flexible photovoltaic support system based on a preset span and preset load conditions; adjusting the design height of each cable truss unit and determining the parameter information of each cable truss unit, each support frame and each support, based on preset geological information and the stress conditions, so that the flexible photovoltaic support system meets preset requirements.

[0016] As one possible implementation, the preset requirements include preset deformation limit requirements and preset stress ratio limit requirements. Based on preset geological survey information and the stress conditions, the design height of each cable truss unit is adjusted and the parameter information of each cable truss unit, each support frame, and each support is determined to ensure that the flexible photovoltaic support system meets the preset requirements. This includes: adjusting the initial stress of each upper cable unit and each lower cable unit based on the stress conditions; adjusting the design height of each cable truss unit based on preset geological survey information, the stress conditions, and the initial stress to ensure that the flexible photovoltaic support system meets the preset deformation limit requirements; if the flexible photovoltaic support system meets the preset stress ratio limit requirements, then based on the stress conditions and the initial stress, the parameter information of each cable truss unit, each support frame, and each support is determined to ensure that the flexible photovoltaic support system meets the preset stress ratio limit requirements; if the flexible photovoltaic support system does not meet the preset stress ratio limit requirements, then the step of adjusting the initial stress of each upper cable unit and each lower cable unit based on the stress conditions is repeated.

[0017] This invention provides a flexible photovoltaic support system based on a tensioned cable structure and its design method. The flexible photovoltaic support system includes multiple intersecting cable truss units, multiple support frames, and multiple supports. Each cable truss unit includes an upper cable unit and a lower cable unit. Each support frame is located at the intersection of the intersecting cable truss units. Each support frame is connected to the upper and lower cable units of its corresponding intersecting cable truss unit. Each support is located at the end of a corresponding cable truss unit. The upper part of each support is connected to the upper and lower cable units of the corresponding cable truss unit, and the lower part of each support is fixedly connected to the ground. By employing the aforementioned technology, the cable truss units are arranged in an intersecting pattern and include upper and lower layers of cable units. This significantly improves the overall load-bearing efficiency and stiffness of the flexible photovoltaic support system, and effectively controls deformation. Only the support frame and supports are subjected to bending, while the remaining parts are subjected to tension through a mesh structure formed by the upper and lower layers of cable truss units. This allows the overall tensile and load-bearing performance of the flexible photovoltaic support system to be fully realized, resulting in a substantial reduction in steel consumption compared to traditional photovoltaic support systems, demonstrating significant economic advantages. It also increases the installation area of ​​photovoltaic panels, improves site utilization and power generation, and facilitates processing and on-site installation. The flexible photovoltaic support system is highly adaptable and expandable, allowing for flexible adjustment of the number of cable truss units for splicing and expansion according to the actual conditions and span requirements of different sites, achieving diverse structural spans and morphological arrangements.

[0018] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained in accordance with the structures particularly pointed out in the description, claims and drawings.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of a flexible photovoltaic support system based on a tension cable structure according to an embodiment of the present invention; Figure 2 This is a three-dimensional structural diagram of the flexible photovoltaic support system based on a tension cable structure in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the single cable truss in the X and Y directions in an embodiment of the present invention; Figure 4 This is a schematic diagram of the support frame in an embodiment of the present invention; Figure 5 This is a schematic diagram of the support structure in an embodiment of the present invention; Figure 6 This is a flowchart illustrating a design method for a flexible photovoltaic support system based on a tension cable structure, as described in an embodiment of the present invention. Figure 7 This is a flowchart of the design method in an embodiment of the present invention.

[0022] Icons: 100-Cable truss unit; 101-Upper cable unit; 102-Lower cable unit; 1-X-direction cable truss; 2-Y-direction cable truss; 3-Upper cable; 4-Lower cable; 5-Support frame; 6-Beam; 7-Column; 8-Support; 9-Horizontal member; 10-Vertical member; 11-Coiled member; 12-Anchoring member. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Currently, common flexible photovoltaic support systems based on tension cable structures generally have significant shortcomings in terms of large span, high stability, and efficient material utilization, making it difficult to meet the needs of large-scale applications under complex weather conditions and diverse terrains.

[0025] Based on this, the present invention provides a flexible photovoltaic support system based on a tension cable structure and its design method, which can alleviate the above-mentioned problems existing in related technologies.

[0026] To facilitate understanding of this embodiment, a detailed description of a flexible photovoltaic support system based on a tension cable structure disclosed in this embodiment of the invention will be provided first. (See [link to relevant documentation]). Figure 1 As shown, the flexible photovoltaic support system may include: multiple intersecting cable truss units 100, each cable truss unit 100 including an upper cable unit 101 and a lower cable unit 102; multiple support frames 5, each support frame 5 being disposed at the intersection of the intersecting cable truss units 100, each support frame 5 being connected to the upper cable unit 101 and the lower cable unit 102 of its corresponding intersecting cable truss unit 100; and multiple supports 8, each support 8 being disposed at the end of a corresponding cable truss unit 100, the upper part of each support 8 being connected to the upper cable unit 101 and the lower cable unit 102 of the corresponding cable truss unit 100, and the lower part of each support 8 being fixedly connected to the ground.

[0027] This invention provides a flexible photovoltaic support system based on a tensioned cable structure. The cable truss units are arranged in an intersecting pattern and include upper and lower layers of cable units. This significantly improves the overall load-bearing efficiency and stiffness of the flexible photovoltaic support system, and effectively controls deformation. Only the support frame and supports are subjected to bending, while the remaining parts are subjected to tension through a mesh structure formed by the upper and lower layers of cable truss units. This allows the overall tensile and load-bearing performance of the flexible photovoltaic support system to be fully realized. Compared to traditional photovoltaic support systems, the amount of steel used is significantly reduced, resulting in a clear economic advantage. It also increases the installation area of ​​photovoltaic panels, improves site utilization and power generation, and facilitates processing and on-site installation. The flexible photovoltaic support system is highly adaptable and expandable, allowing for flexible adjustment of the number of cable truss units for splicing and expansion according to the actual conditions and span requirements of different sites, achieving diverse structural spans and morphological arrangements.

[0028] As one possible implementation method, see Figure 1 and Figure 2 As shown, the intersecting cable truss elements 100 can be orthogonal in their projections on the horizontal plane.

[0029] As one possible implementation method, see Figures 1 to 3 As shown, the plurality of cable truss units 100 may include a plurality of first cable trusses (such as...) spaced apart along a first direction. Figure 3 The X-direction cable truss 1) and multiple second cable trusses spaced apart along the second direction (such as Figure 3 In the Y-direction cable truss 2), the first direction and the second direction can be orthogonal in the same horizontal plane.

[0030] As one possible implementation method, see Figures 1 to 4 As shown, each support frame 5 may include a crossbeam 6 and a column 7. Each crossbeam 6 of the same support frame 5 may be connected to the upper end of each column 7 of the same support frame 5. Each crossbeam 6 may be connected to each cable truss unit 100 (e.g., ...) that intersects with it. Figure 3 The upper cable unit 101 of the X-direction cable truss 1 or Y-direction cable truss 2 is connected, and the lower end of each column 7 is connected to the lower cable unit 102 of each cable truss unit 100 that it intersects with.

[0031] As one possible implementation method, see Figures 1 to 4 As shown, each upper cable unit 101 may include at least two upper cables 3 arranged in parallel (e.g., Figure 3 There are two upper cables 3); each support frame 5 may include multiple crossbeams 6 (e.g. Figure 4 There are two crossbeams 6 in the middle), and multiple crossbeams 6 of the same support frame 5 are arranged intersectingly (e.g., Figure 4 The two crossbeams 6 intersect to form an "X" shape, and each crossbeam 6 is connected to its corresponding upper cable 3 (e.g., Figure 3 and Figure 4 The two crossbeams 6 intersect to form an "X" shape, and each end of the crossbeam 6 is connected to two opposite corners of the rectangular structure formed by the intersection of the two upper cables 3 of the corresponding X-direction cable truss 1 and the two upper cables 3 of the corresponding Y-direction cable truss 2.

[0032] As one possible implementation method, see Figures 1 to 4 As shown, each lower cable unit 102 may include at least one lower cable 4 (e.g., Figure 3 There is a lower cable 4); each support frame 5 may include at least one column 7 (e.g., Figure 4 There is one column 7 in the middle), and the upper end of each column 7 of the same support frame 5 is connected to each crossbeam 6 of the same support frame 5 (e.g., Figure 4The upper end of one of the columns 7 is connected to the center of the "X"-shaped structure formed by the intersection of two crossbeams 6, and the lower end of each column 7 is connected to each of its corresponding lower-level cables 4 (e.g., Figure 3 and Figure 4 The lower end of one of the columns 7 is connected to the intersection point formed by the intersection of a lower cable 4 of the corresponding X-direction cable truss 1 and a lower cable 4 of the corresponding Y-direction cable truss 2.

[0033] As one possible implementation method, see Figures 1 to 3 , Figure 5 As shown, each support 8 may include a horizontal member 9 (e.g., Figure 5 There is a horizontal component 9 and a support component. Each horizontal component 9 of the same support 8 is connected to the upper end of each support component of the same support 8, and the lower end of each support component is fixedly connected to the ground.

[0034] As one possible implementation method, see Figures 1 to 3 , Figure 5 As shown, each support 8 may also include an anchoring member 12; the supporting member may include a vertical member 10 (e.g., Figure 5 There is a vertical member 10) and / or a diagonal member 11 (e.g. Figure 5 There is a tie rod 11 in the middle); each horizontal member 9 of the same support 8 is respectively connected to the upper end of each vertical member 10 of the same support 8 and / or the upper end of each tie rod 11 (e.g. Figure 5 A horizontal member 9 is connected to the upper end of a vertical member 10 and the upper end of a diagonal member 11, and the upper end of the vertical member 10 can be connected to the upper end of the diagonal member 11. The lower end of each vertical member 10 and / or the lower end of each diagonal member 11 is fixedly connected to the ground by a corresponding anchoring member 12 (e.g., ...). Figure 5 The lower end of a vertical member 10 and the lower end of a diagonal member 11 are each fixedly connected to the ground by a corresponding anchoring member 12.

[0035] For ease of understanding, the structure and principle of a flexible photovoltaic support system based on a tension cable structure are described below using a specific application as an example.

[0036] See Figures 2 to 5 As shown, a flexible photovoltaic support system based on a tensioned cable structure can include multiple X-axis cable trusses 1 and multiple Y-axis cable trusses 2. The multiple X-axis cable trusses 1 and multiple Y-axis cable trusses 2 are arranged orthogonally to form a mesh structure (e.g., Figure 2(As shown); X-direction cable truss 1 and Y-direction cable truss 2 each include upper cable 3 and lower cable 4. A rectangular structure can be formed by the intersection of two upper cable 3 of the corresponding X-direction cable truss 1 and two upper cable 3 of the corresponding Y-direction cable truss 2. Furthermore, an upper cable net structure can be formed by the intersection of multiple upper cable 3 of X-direction cable truss 1 and multiple upper cable 3 of Y-direction cable truss 2. Alternatively, an intersection point can be formed by the intersection of one lower cable 4 of the corresponding X-direction cable truss 1 and one lower cable 4 of the corresponding Y-direction cable truss 2. Furthermore, a lower cable net structure can be formed by the intersection of multiple lower cable 4 of X-direction cable truss 1 and multiple lower cable 4 of Y-direction cable truss 2. The intersecting X-direction cable truss 1 and Y-direction cable truss 2 are provided with support frames 5 at their intersection. The support frames 5 can adopt a "T" shaped structure, specifically including two crossbeams 6 and one column 7. The two crossbeams 6 of each support frame 5 intersect to form an "X" shaped structure. The upper end of one column 7 of each support frame 5 is connected to the center position of the corresponding "X" shaped structure, and the lower end of one column 7 of each support frame 5 is connected to the corresponding intersection point in the lower cable net structure. The intersecting X-direction cable truss 1 and Y-direction cable truss 2 can be effectively connected through the support frames 5, thereby enabling the X-direction cable truss 1 and Y-direction cable truss 2 to work together. The ends of the X-direction cable truss 1 and the Y-direction cable truss 2 are each supported by peripheral supports 8. The supports 8 may include horizontal members 9, vertical members 10, diagonal members 11 and anchoring members 12. In each support 8, the upper end of a vertical member 10 is connected to the upper end of a diagonal member 11, and a horizontal member 9 is connected to the upper end of the vertical member 10 and the upper end of the diagonal member 11 respectively. The lower end of the vertical member 10 is fixedly connected to the ground through an anchoring member 12, and the lower end of the diagonal member 11 is fixedly connected to the ground through another anchoring member 12. It should be noted that the components of support frame 5 are made of materials including but not limited to steel, aluminum, titanium, etc., and support frame 5 is still considered support frame 5 even after adding or removing crossbeams 6, columns 7 and other components; the components of support 8 are made of materials including but not limited to steel, aluminum, titanium, etc., and support 8 is still considered support 8 even after adding or removing horizontal components 9, vertical components 10, diagonal bracing components 11, anchoring components 12 and other components. The aforementioned flexible photovoltaic support system integrates the advantages of various traditional flexible systems. It forms a three-dimensional flexible cable net structure by connecting bidirectional orthogonal cable trusses with double-layer cable structures to the support 8. The upper cable 3 is a stabilizing cable (used to hold photovoltaic modules and resist wind suction), and the lower cable 4 is a load-bearing cable (used to resist constant load and wind pressure). Support frames 5 are arranged at the intersection of the cable trusses. The support frames 5 are also located between the load-bearing and stabilizing cables. The intersecting cable trusses are effectively connected by the support frames 5, which allows the bidirectional orthogonal cable trusses with double-layer cable structures to work together. Moreover, the efficiency of bidirectional prestressing significantly improves the overall stiffness and stability of the flexible cable net structure.

[0037] The aforementioned flexible photovoltaic support system has the following advantages: (1) The cable trusses are arranged in two directions and have double-layer cables, which greatly improves the load-bearing efficiency and stiffness of the overall structure and effectively controls the deformation. (2) Fully utilize the material properties. The bending members are only used in the support frame 5, support 8 and other parts, while the rest are tensioned by cable nets. This allows the tensile performance of the cables and the load-bearing performance of the support frame 5, support 8 and other parts to be reflected. The amount of steel used is greatly reduced compared with the traditional photovoltaic support system, and the economic advantage is obvious. (3) By forming a cable net structure, the installation area of ​​photovoltaic panels is increased, thereby improving site utilization and power generation; (4) It is easy to standardize and optimize the components and effectively control the length and weight of individual parts, which is conducive to achieving standardized factory processing and convenient on-site installation; (5) It has strong adaptability and scalability. It can flexibly adjust the number of units to splice and expand according to the actual conditions and span requirements of different sites, so as to realize diverse structural spans and form arrangements, which is both practical and economical.

[0038] This invention also provides a design method for the above-mentioned flexible photovoltaic support system, see [link to relevant documentation]. Figure 1 and Figure 6 As shown, this design method may include the following steps: Step S601: Based on the preset span and preset load conditions, determine the stress conditions of each component of the flexible photovoltaic support system.

[0039] Step S602: Based on the preset geological survey information and the stress conditions, adjust the design height of each cable truss unit 100 and determine the parameter information of each cable truss unit 100, each support frame 5 and each support 8, so that the flexible photovoltaic support system meets the preset requirements.

[0040] The aforementioned preset requirements may include preset deformation limit requirements and preset stress ratio limit requirements; based on this, the aforementioned step S602 (i.e., based on preset geological survey information and the stress conditions, adjusting the design height of each cable truss unit 100 and determining the parameter information of each cable truss unit 100, each support frame 5, and each support 8, so that the flexible photovoltaic support system meets the preset requirements) may include: 1) Based on the stress conditions, adjust the initial stress of each of the upper cable unit 101 and each of the lower cable units 102; 2) Based on the preset geological survey information, the stress conditions and the initial stress, adjust the design height of each cable truss unit 100 so that the flexible photovoltaic support system meets the preset deformation limit requirements; 3) If the flexible photovoltaic support system meets the preset stress ratio limit requirement, then based on the stress condition and the initial stress, determine the parameter information of each of the cable truss units 100, each of the support frames 5 and each of the supports 8, so that the flexible photovoltaic support system meets the preset stress ratio limit requirement; 4) If the flexible photovoltaic support system does not meet the preset stress ratio limit requirement, the step of adjusting the initial stress of each upper cable unit 101 and each lower cable unit 102 based on the stress condition shall be repeated.

[0041] The design method provided in this embodiment of the invention has the same implementation principle and technical effect as the aforementioned flexible photovoltaic support system embodiment. For the sake of brevity, any parts not mentioned in the design method embodiment can be referred to the corresponding content in the aforementioned flexible photovoltaic support system embodiment.

[0042] To facilitate understanding, the implementation process of the above design method will be described exemplarily below using a specific application as an example.

[0043] See Figures 2 to 5 , Figure 7 As shown, this design method may specifically include the following steps: Step S1: Determine the structural layout, span, and load conditions based on the actual site conditions.

[0044] Step S2: Based on the span and load conditions determined in step S1, model and analyze the structure to determine the stress conditions of each component of the flexible photovoltaic support system.

[0045] It should be noted that the span of the aforementioned flexible photovoltaic support system is not limited by the actual site conditions, and the system can be arbitrarily spliced ​​and expanded. The crossbeams 6 of the support frame 5 are rigidly connected, and the columns 7 are rigidly connected or hinged to the crossbeams 6.

[0046] Step S3: Based on the stress conditions of each component determined in step S2, adjust the initial stress of the upper and lower cables, and simultaneously adjust the height of the cable truss to ensure that the structure meets the deformation limit requirements under various load conditions.

[0047] It should be noted that the deformation limit requirements include deformation under single working conditions (such as dead load, wind pressure, wind suction, snow load, temperature load, etc.) and deformation under combined working conditions. Furthermore, local deformation should not exceed the deformation limit requirements of the photovoltaic module. Therefore, the purpose of step S3 above is primarily to ensure that the structure meets the deformation limit requirements under both single and combined working conditions such as dead load, wind pressure, wind suction, snow load, and temperature load.

[0048] Step S4: Based on the initial stress of the upper and lower cables and the internal forces of each component in step S3, determine the cross-sectional shape and dimensions of the upper and lower cables and other components so that the components meet the stress ratio limit requirements.

[0049] It should be noted that the initial stress and internal forces under stress of the cable are related to the cable material and cross-sectional dimensions. If the initial stress determined in step S3 meets the deformation limit requirement, but the stress ratio limit requirement cannot be met in step S4, after adjusting the cable cross-section, the process should return to step S3 to readjust the initial stress and verify the deformation.

[0050] Step S5: Based on the geological survey data and the stress conditions of the end nodes of the cable net structure, adjust the height of the upper and lower layers of cables (i.e., the height of the cable truss) and the length, arrangement angle, cross-sectional form and cross-sectional size of each component in the support 8 so that the support 8 meets the requirements of tensile bearing capacity, pull-out bearing capacity, bending bearing capacity, crack resistance bearing capacity and horizontal bearing capacity.

[0051] It should be noted that the arrangement angle of the support 8 components is closely related to the stress, and the cross-sectional shape and dimensions of the diagonal tension member 11 affect the bending moment of the vertical member 10. Therefore, the purpose of step S5 above is mainly to determine the length, arrangement angle, and cross-sectional specifications of each component in the support 8 so that the support 8 meets the requirements for tensile bearing capacity, pull-out bearing capacity, bending bearing capacity, crack resistance, and horizontal bearing capacity.

[0052] Unless otherwise specifically stated, the relative steps, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention.

[0053] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0054] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0055] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A flexible photovoltaic support system based on a tension cable structure, characterized in that, include: Multiple intersecting cable truss units, each of the cable truss units comprising an upper cable unit and a lower cable unit; Multiple support frames are provided, each of which is located at the intersection of the intersecting cable truss units, and each of the support frames is connected to the upper cable unit and the lower cable unit of each intersecting cable truss unit respectively. Multiple supports are provided, each of which is disposed at the end of a corresponding cable truss unit. The upper part of each support is connected to the upper cable unit and the lower cable unit of the corresponding cable truss unit, and the lower part of each support is fixedly connected to the ground.

2. The flexible photovoltaic support system according to claim 1, characterized in that, The projections of the intersecting cable truss units onto the horizontal plane are orthogonal.

3. The flexible photovoltaic support system according to claim 2, characterized in that, The plurality of cable truss units include a plurality of first cable trusses spaced apart along a first direction and a plurality of second cable trusses spaced apart along a second direction, wherein the first direction and the second direction are orthogonal in the same horizontal plane.

4. The flexible photovoltaic support system according to any one of claims 1 to 3, characterized in that, Each of the support frames includes a crossbeam and a column. Each crossbeam of the same support frame is connected to the upper end of each column of the same support frame. Each crossbeam is connected to the upper cable unit of each cable truss unit that it intersects with. The lower end of each column is connected to the lower cable unit of each cable truss unit that it intersects with.

5. The flexible photovoltaic support system according to claim 4, characterized in that, Each of the upper cable units includes at least two upper cables arranged in parallel; each of the support frames includes multiple crossbeams, the multiple crossbeams of the same support frame are intersecting, and each crossbeam is connected to each of its corresponding upper cables.

6. The flexible photovoltaic support system according to claim 4, characterized in that, Each of the lower cable units includes at least one lower cable; each of the support frames includes at least one column, the upper end of each column of the same support frame is connected to each of the crossbeams of the same support frame, and the lower end of each column is connected to each of its corresponding lower cables.

7. The flexible photovoltaic support system according to any one of claims 1 to 3, characterized in that, Each of the supports includes a horizontal member and a supporting member. Each of the horizontal members of the same support is connected to the upper end of each of the supporting members of the same support, and the lower end of each of the supporting members is fixedly connected to the ground.

8. The flexible photovoltaic support system according to claim 7, characterized in that, Each of the supports further includes an anchoring member; the supporting member includes a vertical member and / or a diagonal member; each of the horizontal members of the same support is respectively connected to the upper end of each of the vertical members and / or the upper end of each of the diagonal members of the same support, and the lower end of each of the vertical members and / or the lower end of each of the diagonal members is respectively fixedly connected to the ground through the corresponding anchoring member.

9. A design method for a flexible photovoltaic support system according to any one of claims 1 to 8, characterized in that, include: Based on the preset span and preset load conditions, the stress conditions of each component of the flexible photovoltaic support system are determined; Based on the preset geological survey information and the stress conditions, the design height of each cable truss unit is adjusted and the parameter information of each cable truss unit, each support frame and each support is determined so that the flexible photovoltaic support system meets the preset requirements.

10. The design method according to claim 9, characterized in that, The preset requirements include preset deformation limit requirements and preset stress ratio limit requirements; Based on preset geological survey information and the stress conditions, the design height of each cable truss unit is adjusted, and the parameter information of each cable truss unit, each support frame, and each support is determined to ensure that the flexible photovoltaic support system meets preset requirements, including: Based on the stress conditions, the initial stress of each upper cable unit and each lower cable unit is adjusted. Based on the preset geological survey information, the stress conditions, and the initial stress, the design height of each cable truss unit is adjusted so that the flexible photovoltaic support system meets the preset deformation limit requirements. If the flexible photovoltaic support system meets the preset stress ratio limit requirement, then based on the stress condition and the initial stress, the parameter information of each cable truss unit, each support frame and each support is determined so that the flexible photovoltaic support system meets the preset stress ratio limit requirement; If the flexible photovoltaic support system does not meet the preset stress ratio limit requirement, then the step of adjusting the initial stress of each upper cable unit and each lower cable unit based on the stress condition is repeated.

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