Photovoltaic support for the combination of rigidity and flexibility in extreme weather

Abstract

The utility model discloses a kind of photovoltaic support for rigid-flexible combination under extreme weather, including rigid support main body, rigid support main body includes column installed on base and the support frame for installing photovoltaic board, support frame is installed on column;First inhaul cable is installed on support frame, first inhaul cable is used to bear tensile force effect to prevent the displacement of support frame relative to column from exceeding set range;The first end of first inhaul cable is fixedly connected relative to base, second end is connected with support frame.By setting first inhaul cable in support frame, and make the first end of first inhaul cable fixedly connected relative to base, second end is connected with support frame, in this way, when external load exerts force effect to support frame, corresponding direction's first inhaul cable exerts tensile force effect to support frame to balance the force exerted by external load, to enable the structure protection stability of rigid support main body, it is especially suitable for strong wind, typhoon and other extreme weather load working condition.

Description

Technical Field

[0001] This utility model belongs to the field of photovoltaic power generation technology, specifically a photovoltaic support system that combines rigidity and flexibility for use in extreme weather conditions. Background Technology

[0002] A photovoltaic (PV) power generation system is a system that uses the photovoltaic effect of photovoltaic cells to directly convert solar radiation energy into electrical energy. The energy source for PV power generation systems is solar energy, which is a clean, safe, and renewable energy source, and is therefore receiving increasing attention.

[0003] With the dramatic changes in global climate, extreme weather events are becoming more frequent. Extreme weather (such as strong winds and typhoons) has a destructive force on photovoltaic (PV) power plants, causing severe damage and significant economic losses. Specifically, the wind field environment on building rooftops is complex. Under the influence of strong winds or typhoons, the main components and connecting parts of PV support systems are highly susceptible to damage, especially when installing PV support systems on the roofs of older buildings. When strong winds strike, the PV support systems experience upward displacement under negative wind pressure. Excessive displacement forces significant internal forces on the support members, potentially damaging the existing building and posing a major safety hazard. Furthermore, as the country places increasing emphasis on the PV industry, the scale of PV panel arrays is growing, the aspect ratio of PV arrays is increasing, and the planar arrangement of PV arrays is becoming irregular. The wind load on large PV arrays is becoming increasingly complex, thus placing higher demands on the overall stability of PV support systems.

[0004] Photovoltaic support structures are the supporting structures for photovoltaic modules, and their safety and lifespan affect the entire photovoltaic power generation system. Currently, the structural design of onshore photovoltaic support systems does not consider the load conditions of extreme weather events such as strong winds and typhoons, and therefore cannot effectively withstand severe weather. While some existing photovoltaic support systems incorporate wind-resistant designs, their wind-resistant measures have the following shortcomings:

[0005] 1) Increase the design load and increase the cross-sectional dimensions of each component of the photovoltaic support; Disadvantage: It cannot effectively reduce wind vibration response and increases the construction cost of photovoltaic power plants.

[0006] 2) Increase self-weight or counterweight; Disadvantages: Increases cost and cannot effectively reduce wind-induced vibration response.

[0007] 3) Strengthen node design; Disadvantage: It cannot reduce the wind vibration response of photovoltaic brackets under strong winds or typhoons.

[0008] 4) Adjust the photovoltaic angle to reduce the wind pressure on the structure; Disadvantage: It cannot effectively reduce the wind vibration response of the photovoltaic support under strong winds or typhoons. Utility Model Content

[0009] In view of this, the purpose of this utility model is to provide a photovoltaic support structure that combines rigidity and flexibility for use in extreme weather conditions, which can effectively improve the wind resistance and stability of the structure, reduce the wind vibration response of the photovoltaic support structure, and reduce economic losses caused by partial or overall structural damage.

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] A flexible yet rigid photovoltaic support structure for extreme weather conditions includes a rigid support body. The rigid support body includes a column mounted on a foundation and a support frame for mounting photovoltaic panels. The support frame is mounted on the column. A first cable is installed on the support frame to withstand tensile force and prevent the displacement of the support frame relative to the foundation from exceeding a predetermined range. A first end of the first cable is fixedly connected to the foundation, and a second end is connected to the support frame.

[0012] Furthermore, the first end of the first cable is connected to the ground or roof; or, the first end of the first cable is connected to the foundation or column of the rigid support body to which it is located; or, the first end of the first cable is connected to the foundation or column of another adjacent rigid support body.

[0013] Furthermore, the column extends upward above the support frame, and a second cable is provided between the top of the column and the support frame. The first end of the second cable is connected to the column, and the second end is connected to the support frame.

[0014] Furthermore, the first and second cables are made of flexible materials that can withstand tensile forces.

[0015] Furthermore, the first and second cables are made of prestressed steel strands, prestressed steel bars, or steel wire ropes.

[0016] Furthermore, the rigid support body is made of steel, aluminum alloy, or fiber-reinforced composite material.

[0017] Furthermore, the foundation adopts micropile foundation, column independent foundation, strip foundation or rock anchor foundation.

[0018] Furthermore, the rigid support body adopts a support structure that is mainly subjected to bending as a whole; or, the rigid support body adopts a support structure that is mainly subjected to compression as a whole.

[0019] Furthermore, the rigid support body adopts a single-column single-slope support structure, an independent column support structure, a double-column single-slope support structure, or a multi-column single-slope support structure.

[0020] Furthermore, the support frame is equipped with a damping shock absorber.

[0021] The beneficial effects of this utility model are as follows:

[0022] This invention relates to a rigid-flexible photovoltaic support system designed for extreme weather conditions. By incorporating a first cable into the support frame, with one end fixedly connected to the foundation and the other end connected to the support frame, when an external load is applied to the support frame, the corresponding first cable exerts tension on the support frame to balance the force of the external load. This ensures the structural stability of the rigid support structure, making it particularly suitable for load conditions in extreme weather events such as strong winds and typhoons. It also offers the following advantages:

[0023] (1) It can increase the structural stiffness of the rigid support body, reduce displacement and stress of the main components, suppress the dynamic response caused by wind vibration or earthquake, and effectively solve the problems of insufficient load-bearing capacity and overall stability of traditional photovoltaic support structures under strong wind or typhoon extreme weather, thus ensuring the safety of photovoltaic modules and structures.

[0024] (2) It can effectively suppress the vibration of the rigid support main structure under strong wind or earthquake, prevent bolts and other connecting parts from loosening due to vibration, avoid secondary damage caused by photovoltaic panels and support components flying out, and reduce economic losses.

[0025] (3) When the first cable is damaged, it can be replaced locally without affecting the main structure of the support, thus reducing maintenance costs;

[0026] (4) The first cable arrangement is flexible. Multiple cables can be arranged around the support frame, resulting in good overall structural integrity and improving the overall structure's resistance to strong winds, typhoons, or strong earthquakes. It has a wide range of applications: it is suitable not only for ground photovoltaic support systems but also for rooftop photovoltaic support systems; it is suitable not only for onshore photovoltaic support systems but also for offshore photovoltaic support systems; it is suitable not only for regular photovoltaic array groups but also for photovoltaic array groups with excessive aspect ratios and irregular planes, etc. It has high application value and promotion significance. Attached Figure Description

[0027] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0028] Figure 1 This is a schematic diagram of the first structure of the photovoltaic support system of the present invention, which combines rigidity and flexibility under extreme weather conditions.

[0029] Figure 2 This is a schematic diagram of the second structure of the photovoltaic support system that combines rigidity and flexibility for use in extreme weather conditions, as described in this embodiment.

[0030] Figure 3 This is a schematic diagram of the third type of photovoltaic support structure that combines rigidity and flexibility for use in extreme weather conditions, as described in this embodiment.

[0031] Figure 4 This is a schematic diagram of the fourth structure of the photovoltaic support system that combines rigidity and flexibility for extreme weather conditions, as shown in this embodiment.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1-Foundation; 2-Column; 3-Diagonal brace; 4-Diagonal beam; 5-Purlin; 6-Photovoltaic panel; 7-First cable; 8-Second cable. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0035] like Figure 1-4 As shown, this embodiment is a photovoltaic support system that combines rigidity and flexibility for extreme weather conditions. It includes a rigid support body, which comprises a column 2 mounted on a foundation 1 and a support frame for mounting photovoltaic panels 6. The support frame is mounted on the column 2. A first tension cable 7 is installed on the support frame to withstand tensile force and prevent the support frame from displacing beyond a predetermined range relative to the foundation 1. The first end of the first tension cable 7 is fixedly connected to the foundation 1, and the second end is connected to the support frame.

[0036] Specifically, the rigid support body can adopt a support structure that is primarily subjected to bending, such as a planar truss, a three-dimensional truss, or a hollow truss. In other embodiments, the rigid support body can also adopt a support structure that is primarily subjected to compression, such as a solid-web steel arch, or an arched structure in the form of a planar or three-dimensional truss.

[0037] In terms of structural form, the rigid support body adopts photovoltaic support structures such as single-column single-slope support structure, independent column support structure, double-column single-slope support structure, or multi-column single-slope support structure. Specifically, the following describes the specific implementation method of the photovoltaic support system that combines rigidity and flexibility under extreme weather conditions, taking the single-column single-slope support structure as an example.

[0038] Specifically, such as Figure 1-4As shown, the single-column single-slope support structure includes a rigid support body, which includes a column 2 installed on a foundation 1 and a support frame for installing photovoltaic panels 6. The support frame includes an inclined beam 4 installed on the column 2, and the inclined beam 4 is hinged to the column 2. Purlins 5 are installed on the inclined beam 4, and the photovoltaic panels 6 are installed on the purlins 5. An inclined brace 3 is provided between the inclined beam 4 and the foundation 1, and the two ends of the inclined brace 3 are hinged to the foundation 1 and the inclined beam 4, respectively. In this embodiment, a first cable 7 is provided on the inclined beam 4. Specifically, the first end of the first cable 7 is fixedly connected to the foundation 1, and the second end of the first cable 7 is connected to the inclined beam 4. The first end of the first cable 7 can be connected in various ways: such as... Figure 1 As shown, the first end of the first cable 7 is connected to the ground or roof; as Figure 2-3 As shown, the first end of the first cable 7 is connected to the foundation 1 or the column 2; as Figure 4 As shown, the first end of the first cable 7 is connected to the foundation 1 or column 2 of the adjacent rigid support body, that is, the first cable 7 can be arranged between adjacent array groups, which improves the structure's anti-torsion performance and anti-overturning ability, and the overall stability is good.

[0039] In particular, such as Figure 3 As shown, in some embodiments, the column 2 extends upward above the support frame, and a second cable 8 is provided between the top of the column 2 and the support frame. The first end of the second cable 8 is connected to the column 2, and the second end is connected to the support frame. In this embodiment, the second cable 8 is disposed between the top of the column 2 and the inclined beam 4, with the first end of the second cable 8 connected to the top of the column 2 and the second end connected to the inclined beam 4.

[0040] In this embodiment, the first cable 7 and the second cable 8 are made of prestressed steel strand, prestressed steel bar, or steel wire rope. Specifically, in this embodiment, the first cable 7 and the second cable 8 are made of prestressed steel strand, which has a certain degree of flexibility and strong tensile strength. In other embodiments, the first cable 7 and the second cable 8 are also made of flexible materials capable of withstanding tensile forces, such as carbon fiber composite materials.

[0041] In this embodiment, the components of the support body are made of steel. Of course, in other embodiments, the components of the support body may also be made of aluminum alloy or fiber reinforced composite material (FRP), which will not be elaborated further.

[0042] In this embodiment, foundation 1 adopts a micropile foundation. Of course, in some other embodiments, foundation 1 may also adopt an independent column foundation, strip foundation or rock anchor foundation, which will not be described in detail here.

[0043] In a preferred embodiment of this invention, the support frame is equipped with a damping shock absorber to provide cushioning and shock absorption.

[0044] In this embodiment, by setting cables (including the first cable 7 and the second cable 8) on the support frame, a set initial prestress can be applied to the cables during the arrangement of the cables, which has the following advantages.

[0045] (1) A flexible cable system was introduced into the rigid support body. When the structure encounters extreme load conditions such as strong wind, typhoon and strong earthquake, the cable tension offsets the external load, effectively reduces the structural displacement and component stress, suppresses the wind vibration response of the structure, and ensures that the bearing capacity of each component of the main structure meets the requirements.

[0046] (2) The cable is not only lightweight, but also has a small cross section to withstand large tensile force to offset external force, and can significantly reduce costs, thus achieving a lightweight and economical optimized design.

[0047] (3) The design parameters of the cables and rigid support structure can be adjusted to change the natural frequency and modes of the support system, so that the natural frequency of the structure avoids the dominant frequency in strong winds or earthquakes, thus preventing resonance. By changing the arrangement of the cables and main structure, the stiffness of the structure can be increased, the displacement of the structure and the stress of the main components can be reduced, and the dynamic response caused by wind vibration or earthquake can be suppressed. This can effectively solve the problems of insufficient load-bearing capacity and overall stability of traditional photovoltaic support structures under extreme weather conditions such as strong winds or typhoons, and ensure the safety of photovoltaic modules and structures.

[0048] (4) The cable can effectively suppress the vibration of the rigid support body under strong wind or earthquake, prevent bolts and other connecting parts from loosening due to vibration, avoid secondary damage caused by photovoltaic panels and support components flying out, and reduce economic losses.

[0049] (5) When the cable is damaged, it can be replaced locally without affecting the support structure, thus reducing maintenance costs.

[0050] (6) The cable arrangement is flexible and the overall structure is good, which improves the overall structure's resistance to strong winds, typhoons or strong earthquakes. It has a wide range of applications: it is not only suitable for ground photovoltaic support systems, but also for rooftop photovoltaic support systems; it is not only suitable for onshore photovoltaic support systems, but also for offshore photovoltaic support systems; it is not only suitable for regular photovoltaic array groups, but also for photovoltaic array groups with excessive aspect ratios and irregular planes, etc. It has high application value and promotion significance.

[0051] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A photovoltaic support system combining rigidity and flexibility for extreme weather conditions, comprising a rigid support body, the rigid support body including a column mounted on a foundation and a support frame for mounting photovoltaic panels, the support frame being mounted on the column; characterized in that: A first cable is installed on the support frame. The first cable is used to bear the tensile force to prevent the displacement of the support frame relative to the foundation from exceeding the set range. The first end of the first cable is fixedly connected to the foundation, and the second end is connected to the support frame.

2. The photovoltaic support system with both rigidity and flexibility for extreme weather conditions as described in claim 1, characterized in that: The first end of the first cable is connected to the ground or roof; or, the first end of the first cable is connected to the foundation or column of the rigid support body to which it is located; or, the first end of the first cable is connected to the foundation or column of another adjacent rigid support body.

3. The photovoltaic support system with both rigidity and flexibility for extreme weather conditions as described in claim 1, characterized in that: The column extends upward above the support frame, and a second cable is provided between the top of the column and the support frame. The first end of the second cable is connected to the column, and the second end is connected to the support frame.

4. The photovoltaic support system with both rigidity and flexibility for extreme weather conditions as described in claim 3, characterized in that: The first and second cables are made of flexible materials that can withstand tensile forces.

5. The photovoltaic support system with both rigidity and flexibility for extreme weather conditions as described in claim 3, characterized in that: The first and second cables are made of prestressed steel strands, prestressed steel bars or steel wire ropes.

6. The photovoltaic support system with both rigidity and flexibility for extreme weather conditions as described in claim 1, characterized in that: The rigid support body is made of steel, aluminum alloy, or fiber-reinforced composite material.

7. The photovoltaic support system with both rigidity and flexibility for extreme weather conditions as described in claim 1, characterized in that: The foundations are constructed using micropile foundations, independent column foundations, strip foundations, or rock anchor foundations.

8. The photovoltaic support system with both rigidity and flexibility for extreme weather conditions as described in claim 1, characterized in that: The rigid support body adopts a support structure that is mainly subjected to bending; or, the rigid support body adopts a support structure that is mainly subjected to compression.

9. The photovoltaic support system with both rigidity and flexibility for extreme weather conditions as described in claim 1, characterized in that: The rigid support body adopts a single-column single-slope support structure, an independent column support structure, a double-column single-slope support structure, or a multi-column single-slope support structure.

10. The photovoltaic support system for extreme weather conditions according to any one of claims 1-9, characterized in that: The support frame is equipped with a damping shock absorber.

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