Adaptive inflow turbulence system and method for large span flexible photovoltaic arrays

Abstract

This invention discloses an adaptive inflow disturbance system and method suitable for large-span flexible photovoltaic arrays. The system includes a large-span flexible photovoltaic array, on which disturbance devices, wind speed sensors, wind direction sensors, and controllers are installed. The disturbance devices include a front disturbance device and a rear disturbance device. The front disturbance device is installed at the front end of the large-span flexible photovoltaic array, and its left and right ends are rotatably engaged with the array. The rear disturbance device is installed at the rear end of the large-span flexible photovoltaic array, and its left and right ends are rotatably engaged with the array. Both the front and rear disturbance devices have one convex surface on one side and a concave surface on the other. This invention, while ensuring the support span and maintaining low cost, alleviates wind-induced vibration of the photovoltaic system in strong wind environments by adding an adaptive inflow disturbance system, thereby reducing the load on the large-span flexible photovoltaic array and improving the system's wind resistance performance.

Description

Technical Field

[0001] This invention relates to the field of wind load reduction measures for large-span flexible photovoltaic arrays, and particularly to an adaptive inflow disturbance system and method suitable for large-span flexible photovoltaic arrays. Background Technology

[0002] Photovoltaic power generation is a technology that uses sunlight to convert light energy into electrical energy based on the photovoltaic effect. With its clean and renewable characteristics, it has gradually become one of the mainstream power production methods. The stress performance and force transmission mechanism of large-span flexible photovoltaic support arrays are more complex. The support structure is highly susceptible to wind damage under strong wind loads. Therefore, improving the wind resistance of the support structure is crucial in the structural design of photovoltaic supports to enhance the efficiency and stability of large-span flexible photovoltaic power generation systems.

[0003] Large-span flexible photovoltaic arrays can effectively solve the problem of inconvenient installation of traditional rigid photovoltaic arrays in specific spaces. However, the overall wind resistance performance of large-span flexible photovoltaic arrays is not satisfactory and needs to be improved. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an adaptive inflow disturbance system and method suitable for large-span flexible photovoltaic arrays, addressing the shortcomings of the existing systems.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows:

[0006] An adaptive inflow disturbance system for large-span flexible photovoltaic arrays includes a large-span flexible photovoltaic array, on which disturbance devices, wind speed sensors, wind direction sensors, and a controller are installed. The disturbance devices include a front disturbance device and a rear disturbance device. The front disturbance device is installed at the front end of the large-span flexible photovoltaic array, and its left and right ends are rotatably engaged with the large-span flexible photovoltaic array. The rear disturbance device is installed at the rear end of the large-span flexible photovoltaic array, and its left and right ends are rotatably engaged with the large-span flexible photovoltaic array. The front and rear disturbance devices each have one convex surface and the corresponding concave surface on one side. The wind speed sensor is used to sense wind speed, and the wind direction sensor is used to sense wind direction. Both the wind speed sensor and the wind direction sensor are connected to the controller, which can control the rotation of the front and rear disturbance devices, thereby causing the front and rear disturbance devices to disturb the wind blowing across the large-span flexible photovoltaic array.

[0007] To optimize the above technical solution, the specific measures also include:

[0008] Both the front and rear spoilers consist of a first side plate, a second side plate, and left and right side plates. The first side plate and the second side plate are connected to form an L-shaped structure. The left and right side plates are fixed to the left and right ends of the first and second side plates. The left and right side plates are rotatably connected to the large-span flexible photovoltaic array.

[0009] The large-span flexible photovoltaic array includes module cables, photovoltaic modules, columns and crossbars. There are several columns, which are fixed to the ground in two groups, left and right. The crossbars are also divided into two groups, left and right, running back and forth, and are fixed to the upper part of the corresponding columns laterally. The photovoltaic modules are installed on the module cables, and the two ends of the module cables are fixed to the crossbars on the left and right sides respectively, or they are fixed to the ground after passing around the crossbars on the left and right sides respectively.

[0010] The large-span flexible photovoltaic array also includes inclined cables, one end of which is connected to the top of the column and the other end is fixed to the ground. The inclined cables are set at an angle.

[0011] There are several component cables, and multiple photovoltaic modules are connected in series on each component cable. The component cables are arranged in parallel front to back.

[0012] The large-span flexible photovoltaic array includes several central columns, which are fixed to the ground and located between the left and right columns. The module cables pass through the top of the central columns, which are used to support the module cables.

[0013] The wind speed sensor, wind direction sensor, and controller are installed on the top of the column or the middle column, respectively.

[0014] Fixed plates are installed on the left and right ends of the column near the front and rear spoilers, respectively. Rotary motors are installed on the fixed plates. The rotary motors are connected to the controller and also drive the left and right side plates of the corresponding front or rear spoilers. The controller controls the rotation of the front or rear spoilers through the rotary motors.

[0015] An adaptive inflow disturbance method applicable to large-span flexible photovoltaic arrays is applied using the aforementioned adaptive inflow disturbance system for large-span flexible photovoltaic arrays. Specifically, assuming the wind direction is from front to back, when the front and rear disturbance devices rotate, the first and second side plates rotate to form four typical shapes: >, <, Γ, and L. With the direction facing the large-span flexible photovoltaic array as the inward side and the direction away from the array as the outward side, the openings of the > and < shapes face outward and inward, respectively, while the openings of the Γ and L shapes face inward. When the external wind speed sensed by the wind speed sensor is lower than a predetermined value, the front disturbance device remains in the > shape, and the rear disturbance device remains in the < shape.

[0016] When the wind speed sensor detects a wind speed higher than the limit value,

[0017] If the incoming wind direction angle is between 0° and 60° (excluding 60°), the front spoiler is ">" shaped and the rear spoiler is < shaped.

[0018] If the incoming wind direction angle is between 60° and 90° (excluding 90°), the front spoiler is <-shaped and the rear spoiler is <-shaped.

[0019] If the incoming wind direction angle is between 90° and 120° (excluding 120°), the front spoiler should be ">" shaped, and the rear spoiler should be ">" shaped.

[0020] If the incoming wind direction angle is between 120° and 180° (excluding 180°), the front spoiler is ">" shaped and the rear spoiler is < shaped.

[0021] The wind speed limit is 24.4 m / s.

[0022] This invention, while ensuring the span of the support structure and keeping costs low, adds an adaptive incoming flow disturbance system. This system can disturb the incoming flow according to changes in external wind speed and direction, optimize the wind field around the photovoltaic system, reduce the wind load on the photovoltaic modules, alleviate wind-induced vibration of the photovoltaic system in strong wind environments, reduce the load on the large-span flexible photovoltaic array, and thus improve the wind resistance performance of the system.

[0023] This invention provides a turbulence method for an adaptive incoming flow turbulence system under different wind speeds and incoming flow direction angles. This method can maximize the load reduction benefits of the turbulence device for large-span flexible photovoltaic support arrays under all wind direction angles from 0° to 180°. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the adaptive incoming flow disturbance system applicable to large-span flexible photovoltaic arrays in this invention, and a definition diagram of the incoming flow direction angle.

[0025] Figure 2 This is a magnified single-span schematic diagram of the adaptive incoming flow disturbance system applicable to large-span flexible photovoltaic arrays in an example of the present invention;

[0026] Figure 3 This is a partially enlarged schematic diagram of the connection point of the photovoltaic array edge disturbance device in an example of the present invention;

[0027] Figure 4 This is a partially enlarged schematic diagram of the connection point of the disturbance device in the middle of the photovoltaic array in an example of the present invention;

[0028] Figure 5 This is a partially enlarged schematic diagram of the wind speed sensor 2, wind direction sensor 3, and controller 4 in an example of the present invention;

[0029] Figure 6This is a side view of four typical forms of the incoming flow disturbance device in the examples of the present invention;

[0030] Figure 7 This is a comparison chart of wind tunnel test results of the average shape coefficient of the mid-span of five large-span flexible photovoltaic arrays under different wind angles in the examples of this invention;

[0031] Figure 8 This is a comparison chart of wind tunnel test results of the average shape coefficient of the side span of five large-span flexible photovoltaic arrays under different wind angles in the examples of this invention.

[0032] The reference numerals in the figure are as follows: 1. spoiler device, 1a. first side plate, 1b. second side plate, 1c. left and right side plates, 11. front spoiler device, 12. rear spoiler device, 2. wind speed sensor, 3. wind direction sensor, 4. controller, 5. large span flexible photovoltaic array, 51. module cable, 52. photovoltaic module, 53. column, 54. crossbar, 55. diagonal cable, 56. central column, 57. fixing plate, 58. rotating motor. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0034] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0035] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0036] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms “a,” “an,” “an,” “the,” and similar words used in this application do not indicate quantity limitation and may indicate singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or units (elements) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or devices. The terms “connected,” “linked,” “coupled,” and similar words used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms “multiple” / “several” used in this application refer to two or more. “And / or” describes the relationship between related objects, indicating that three relationships may exist; for example, “A and / or B” can indicate: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following objects are in an "or" relationship. The terms "first," "second," and "third" used in this application are merely to distinguish similar objects and do not represent a specific ordering of the objects.

[0037] like Figure 1-5 As shown, the adaptive inflow disturbance system for large-span flexible photovoltaic arrays of the present invention includes a disturbance device 1, a wind speed sensor 2, a wind direction sensor 3, a controller 4, multiple rotating motors 58, and multiple fixed plates 57. The wind speed sensor 2 and the wind direction sensor 3 sense changes in external wind speed and direction to drive the controller 4 to adjust the angle of the disturbance device 1. The large-span flexible photovoltaic array 5 includes components such as cable 51, photovoltaic modules 52, columns 53, crossbars 54, diagonal cables 55, and a central column 56.

[0038] The component cable 51 and photovoltaic module 52 are connected to the foundation through column 53, crossbar 54 and diagonal cable 55. The column 53 is evenly arranged on the left and right edges of the large-span flexible photovoltaic array 5, and the lower end of the column 53 is connected to the foundation. The crossbar 54 is fixed to the middle and upper part of the column 53. One end of the diagonal cable 55 is connected to the crossbar 54 or the upper part of the column 53, and the other end is connected to the foundation.

[0039] A fixing plate 57 is provided on the crossbar 54, and a rotating motor 58 is provided on the fixing plate 57. The power output end of the rotating motor 58 is connected to the side of the turbulence device 1. In a flexible photovoltaic array that spans a large area, the turbulence device 1 also needs to be divided into several sections. Therefore, a crossbar 54 is also provided on the central column 56, and a fixing plate 57 and a rotating motor 58 are also provided on the crossbar 54, so that each section of the turbulence device 1 has a corresponding rotating motor 58 to cooperate with it. Figure 4 As shown.

[0040] The controller 4 is installed on the top of the column 53 located in the middle of the first and last rows. Wind speed sensor 2 and wind direction sensor 3 are fixedly connected to the controller 4. Wind speed sensor 2 receives real-time wind speed signals from the surrounding environment, while wind direction sensor 3 monitors the direction of strong winds and transmits the signals to the controller 4. The controller 4 then drives each motor to operate, changing the shape of the two end-mounted airflow deflectors 1 in real time to improve the wind resistance of the large-span flexible photovoltaic support array. Figure 5 As shown.

[0041] The turbulence-disrupting device 1 undergoes four typical transformations during rotation. Based on cross-sectional type, these four transformations can be named >-shaped, <-shaped, Γ-shaped, and L-shaped. The openings of the >-shaped and <-shaped devices face outwards and inwards, respectively, while the openings of the Γ-shaped and L-shaped devices both face inwards. The definition of the incoming airflow direction angle is as follows: Figure 1 As shown, Figures 7-8 The diagrams show the load reduction effects of different types of flow deflectors 1 on flexible photovoltaic arrays. From the diagrams, it can be seen that the ">" shaped flow deflector 1 has the best overall load reduction performance. Furthermore, the most beneficial form of flow deflector 1 for load reduction of the photovoltaic array varies depending on the incoming wind direction angle. When the external wind speed sensed by the wind speed sensor 2 is below a certain limit, the front flow deflector 11 remains in the ">" shape, and the rear flow deflector 12 remains in the < shape. When the wind speed sensed by the wind speed sensor 2 is above a certain limit, if the incoming wind direction angle is between 0° and 90°, the front-end wind direction sensor 3 and controller 4 begin to operate. The controller 4 receives the signal from the wind direction sensor 3 and controls the rotation of the front-end rotating motor 58 based on the information from the wind direction sensor 3. If the incoming wind direction angle is between 0° and 60°, the front flow deflector 1... 1. The front spoiler 11 remains in a ">" shape. If the incoming wind direction angle is between 60° and 90°, the front spoiler 11 changes to a < shape, while the rear spoiler 12 remains unchanged. If the incoming wind direction angle is between 90° and 180°, the wind direction sensor 3 and controller 4 at the rear end start working. The controller 4 receives the signal from the wind direction sensor 3 and controls the rotation motor 58 at the rear end to rotate according to the information from the wind direction sensor 3. If the incoming wind direction angle is between 120° and 180°, the rear spoiler 12 remains in a < shape. If the incoming wind direction angle is between 90° and 120°, the rear spoiler 12 changes to a ">" shape, while the front spoiler 11 remains unchanged. This maximizes the load reduction benefits of the spoiler 1 for the large-span flexible photovoltaic support array under all wind direction angles from 0° to 180°.

[0042] The present invention provides flow-disrupting devices 1 parallel to the component cables 51 at both the front and rear ends of the large-span flexible photovoltaic array 5. These flow-disrupting devices 1 optimize the wind field around the photovoltaic system, reduce the wind load acting on the photovoltaic components 52, alleviate wind-induced vibrations in strong wind environments, and effectively improve the wind resistance of the photovoltaic system, as described in the present invention. Figures 7-8As shown, after adding the turbulence device 1, the shape coefficient is significantly reduced compared to the original structure and all meet the relevant specifications, proving that the system has a good load reduction effect.

[0043] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should be considered within the scope of protection of the present invention.

Claims

1. An adaptive inrush flow disturbance method applicable to large-span flexible photovoltaic arrays, employing an adaptive inrush flow disturbance system applicable to large-span flexible photovoltaic arrays, the adaptive inrush flow disturbance system applicable to large-span flexible photovoltaic arrays including large-span flexible photovoltaic arrays (5), characterized by: The large-span flexible photovoltaic array (5) is equipped with a flow disturbance device (1), a wind speed sensor (2), a wind direction sensor (3), and a controller (4). The flow disturbance device (1) includes a front flow disturbance device (11) and a rear flow disturbance device (12). The front flow disturbance device (11) is installed at the front end of the large-span flexible photovoltaic array (5), and its left and right ends are rotatably connected to the large-span flexible photovoltaic array (5). The rear flow disturbance device (12) is installed at the rear end of the large-span flexible photovoltaic array (5), and its left and right ends are connected to the rear flow disturbance device (12). The front and rear baffles (11 and 12) are rotatably coupled with the large-span flexible photovoltaic array (5). One side of each of the front and rear baffles is convex, and the other side is concave. The wind speed sensor (2) is used to sense wind speed, and the wind direction sensor (3) is used to sense wind direction. Both the wind speed sensor (2) and the wind direction sensor (3) are connected to the controller (4). The controller (4) can control the rotation of the front baffle (11) and the rear baffle (12), thereby causing the front baffle (11) and the rear baffle (12) to blow against each other. The wind passing through the large-span flexible photovoltaic array (5) is turbulent; the front turbulence device (11) and the rear turbulence device (12) are both composed of a first side plate (1a), a second side plate (1b) and left and right side plates (1c). The first side plate (1a) and the second side plate (1b) are connected to form an L-shaped structure. The left and right side plates (1c) are fixed at the left and right ends of the first side plate (1a) and the second side plate (1b). The left and right side plates (1c) are rotatably connected to the large-span flexible photovoltaic array (5); the turbulence method is as follows: assuming the wind direction is from front to back, the front turbulence device... When the device (11) and the rear spoiler (12) are rotating, the first side plate (1a) and the second side plate (1b) rotate to form four typical shapes, namely > shape, < shape, Γ shape and L shape, with the direction facing the large-span flexible photovoltaic array (5) as the inside and the direction facing away from the large-span flexible photovoltaic array (5) as the outside. The opening directions of the > shape and < shape are outward and inward, respectively, and the opening directions of the Γ shape and L shape are both inward. When the external wind speed sensed by the wind speed sensor (2) is lower than the limit value, the front spoiler (11) remains in the > shape and the rear spoiler (12) remains in the < shape. When the wind speed sensed by the wind speed sensor (2) is higher than the limit value, If the incoming wind direction angle is between 0° and 60°, excluding 60°, the front spoiler (11) is >-shaped and the rear spoiler (12) is <-shaped; If the incoming wind direction angle is between 60° and 90°, excluding 90°, the front spoiler (11) is <-shaped and the rear spoiler (12) is <-shaped; If the incoming wind direction angle is between 90° and 120° (excluding 120°), the front spoiler (11) is shaped like a ">", and the rear spoiler (12) is shaped like a ">". If the incoming wind direction angle is between 120° and 180° (excluding 180°), the front spoiler (11) is >-shaped and the rear spoiler (12) is <-shaped.

2. The adaptive inflow disturbance method for large-span flexible photovoltaic arrays according to claim 1, characterized in that: The large-span flexible photovoltaic array (5) includes a component cable (51), a photovoltaic module (52), a column (53), and a crossbar (54). There are several columns (53), which are fixed to the ground in two groups, left and right. The crossbar (54) is divided into two groups, left and right, running back and forth, and is fixed horizontally to the upper part of the corresponding column (53). The photovoltaic module (52) is installed on the component cable (51). The two ends of the component cable (51) are fixed to the crossbar (54) on the left and right sides respectively, or they are fixed to the ground after passing around the crossbar (54) on the left and right sides respectively.

3. The adaptive inflow disturbance method for large-span flexible photovoltaic arrays according to claim 2, characterized in that: The large-span flexible photovoltaic array (5) also includes a diagonal cable (55), one end of which is connected to the top of the column (53) and the other end is fixed to the ground. The diagonal cable (55) is set at an angle.

4. The adaptive inflow disturbance method for large-span flexible photovoltaic arrays according to claim 3, characterized in that: There are several component cables (51), and multiple photovoltaic modules (52) are connected in series on each component cable (51). The component cables (51) are arranged in parallel front to back.

5. The adaptive inflow disturbance method for large-span flexible photovoltaic arrays according to claim 4, characterized in that: The large-span flexible photovoltaic array (5) includes a central column (56), and there are several central columns (56). The central column (56) is fixed to the ground and located between the left column (53) and the right column (53). The component cable (51) passes through the upper end of the central column (56), and the central column (56) is used to support the component cable (51).

6. The adaptive inflow disturbance method for large-span flexible photovoltaic arrays according to claim 5, characterized in that: The wind speed sensor (2), wind direction sensor (3) and controller (4) are respectively installed on the top of the column (53) or the middle column (56).

7. The adaptive inflow disturbance method for large-span flexible photovoltaic arrays according to claim 6, characterized in that: in A fixing plate (57) is installed on the left and right ends of the column (53) near the front spoiler (11) and the rear spoiler (12). A rotating motor (58) is installed on the fixing plate (57). The rotating motor (58) is connected to the controller (4) by signal. The rotating motor (58) is also in transmission cooperation with the left and right side plates (1c) of the corresponding front spoiler (11) or rear spoiler (12). The controller (4) controls the rotation of the front spoiler (11) or the rear spoiler (12) through the rotating motor (58).

8. The adaptive inflow disturbance method for large-span flexible photovoltaic arrays according to claim 1, characterized in that: The wind speed limit is 24.4 m / s.

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