Self-adaptive incoming flow turbulence system and method suitable for large-span flexible photovoltaic array

Abstract

The invention discloses a self-adaptive incoming flow turbulence system and method suitable for a large-span flexible photovoltaic array, the system comprises the large-span flexible photovoltaic array, turbulence devices, a wind speed sensor, a wind direction sensor and a controller are installed on the large-span flexible photovoltaic array, and the turbulence devices comprise a front turbulence device and a rear turbulence device. The front turbulent flow device is installed at the front end of the large-span flexible photovoltaic array, the left end and the right end of the front turbulent flow device are matched with the large-span flexible photovoltaic array in a rotatable mode, the rear turbulent flow device is installed at the rear end of the large-span flexible photovoltaic array, and the left end and the right end of the rear turbulent flow device are matched with the large-span flexible photovoltaic array in a rotatable mode. One of the front and rear side surfaces of the front turbulent flow device and the rear turbulent flow device is an outer convex surface, and the other corresponding side surface is an inner concave surface. According to the invention, on the premise of ensuring the span and lower cost of the bracket, the self-adaptive incoming flow turbulence system is added, so that the wind-induced vibration of the photovoltaic system in a strong wind environment is relieved, the load reduction of the large-span flexible photovoltaic array is realized, and the wind resistance of the system is further improved.

Description

Technical Field

[0001] The present invention relates to the field of wind load reduction measures for large-span flexible photovoltaic arrays, and in particular to an adaptive incoming flow disturbance system and method suitable for large-span flexible photovoltaic arrays. Background Art

[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 force performance and force transmission mechanism of the large-span flexible photovoltaic support array are more complicated. The support structure is very likely to be overloaded by strong winds and then destroyed by wind. In order to improve the efficiency and stability of the large-span flexible photovoltaic power generation system, it is very important to improve the wind resistance of the support structure when designing the structure of the photovoltaic support.

[0003] Large-span flexible photovoltaic arrays can effectively solve the problem of the inconvenience of installing traditional rigid photovoltaics in a specific space. 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 incoming flow spoiler system and method suitable for a large-span flexible photovoltaic array in view of the above-mentioned existing deficiencies.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the present invention is:

[0006] The invention relates to an adaptive incoming flow spoiler system suitable for a large-span flexible photovoltaic array, comprising a large-span flexible photovoltaic array, on which a spoiler device, a wind speed sensor, a wind direction sensor and a controller are installed. The spoiler device comprises a front spoiler device and a rear spoiler device. The front spoiler device is installed at the front end of the large-span flexible photovoltaic array, and the left and right ends of the front spoiler device are rotatably matched with the large-span flexible photovoltaic array. The rear spoiler device is installed at the rear end of the large-span flexible photovoltaic array, and the left and right ends of the rear spoiler device are rotatably matched with the large-span flexible photovoltaic array. The front and rear side surfaces of the front spoiler device and the rear spoiler device are both one side surface is an outer convex surface, and the corresponding other side surface is an inner concave surface. The wind speed sensor is used to sense the wind speed, and the wind direction sensor is used to sense the wind direction. The wind speed sensor and the wind direction sensor are both connected to the controller, and the controller can control the rotation of the front spoiler device and the rear spoiler device, so that the front spoiler device and the rear spoiler device can spoil the wind blowing through the large-span flexible photovoltaic array.

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

[0008] The front spoiler and the rear spoiler are both composed of a first side panel, a second side panel and left and right side panels. The first side panel is connected to the second side panel to form an L-shaped structure. The left and right side panels are fixed at the left and right ends of the first side panel and the second side panel. The left and right side panels are rotatably connected to the large-span flexible photovoltaic array.

[0009] The large-span flexible photovoltaic array includes component cables, photovoltaic components, columns and cross bars. There are several columns, which are divided into two groups on the left and right and fixed on the ground. The cross bars are divided into two groups on the left and right, running front and back, and fixed laterally on the upper part of the corresponding columns. The photovoltaic components are installed on the component cables, and the two ends of the component cables are respectively fixed on the cross bars on the left and right sides or respectively pass through the cross bars on the left and right sides and are fixed on the ground.

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

[0011] There are several component cables, each of which is connected in series with multiple photovoltaic components, and the component cables are arranged in parallel front and back.

[0012] The large-span flexible photovoltaic array includes a center column, which has several center columns. The center column is fixed to the ground and is located between the left column and the right column. The component cable passes through the upper end of the center column, and the center column is used to support the component cable.

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

[0014] Fixed plates are respectively installed at the left and right ends of the pillars near the front spoiler and the rear spoiler, and rotating motors are installed on the fixed plates. The rotating motors are connected to the controller signals and are also matched with the corresponding left and right side plates of the front spoiler or the rear spoiler. The controller controls the rotation of the front spoiler or the rear spoiler through the rotating motors.

[0015] An adaptive incoming flow spoiler method applicable to a large-span flexible photovoltaic array, applying the above-mentioned adaptive incoming flow spoiler system for a large-span flexible photovoltaic array, and the specific method is: assuming that the wind direction is from front to back, when the front spoiler device and the rear spoiler device are rotating, the first side plate and the second side plate rotate to form four typical shapes, namely > shape, < shape, Γ shape and L shape, with the direction facing the large-span flexible photovoltaic array as the inside and the direction facing away from the large-span flexible photovoltaic array as the outside, the opening directions of the > shape and the < shape are outward and inward respectively, and the opening directions of the Γ shape and the L shape are both inward, and when the external wind speed sensed by the wind speed sensor is lower than the limit value, the front spoiler device is kept in the > shape, and the rear spoiler device is kept in the < shape;

[0016] When the wind speed sensed by the wind speed sensor is higher than the limit value,

[0017] If the incoming wind direction angle is between 0° and 60°, excluding 60°, the front spoiler is in the shape of > and the rear spoiler is in the shape of <;

[0018] If the incoming wind direction angle is between 60° and 90°, excluding 90°, the front spoiler is in the shape of < and the rear spoiler is in the shape of <;

[0019] If the incoming wind direction angle is between 90° and 120°, excluding 120°, the front spoiler is in the shape of > and the rear spoiler is in the shape of >.

[0020] If the incoming wind direction angle is between 120° and 180°, excluding 180°, the front spoiler is in the shape of > and the rear spoiler is in the shape of <.

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

[0022] The beneficial effects of the present invention are:

[0023] 1. Under the premise of ensuring the span of the bracket and low cost, the present invention adds an adaptive incoming flow spoiler system, so that the system can spoil the incoming flow according to the changes in external wind speed and wind direction, optimize the wind field around the photovoltaic system, reduce the wind load on the photovoltaic components, alleviate the wind-induced vibration of the photovoltaic system in a strong wind environment, achieve load reduction for the large-span flexible photovoltaic array, and thus improve the wind resistance of the system.

[0024] 2. The present invention provides a spoiler method for an adaptive incoming flow spoiler system under different wind speeds and incoming flow wind direction angles. The method can maximize the load reduction effect of the spoiler device on a large-span flexible photovoltaic support array at all wind direction angles of 0°-180°. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the adaptive incoming flow spoiler system applicable to the large-span flexible photovoltaic array in the example of the present invention and a definition diagram of the incoming flow wind direction angle;

[0026] Figure 2 It is a single-span enlarged schematic diagram of an adaptive incoming flow disturbance system applicable to a large-span flexible photovoltaic array in an example of the present invention;

[0027] Figure 3 It is a partial enlarged schematic diagram of the connection of the photovoltaic array edge spoiler device in the example of the present invention;

[0028] Figure 4 It is a partial enlarged schematic diagram of the connection of the spoiler device in the middle of the photovoltaic array in the example of the present invention;

[0029] Figure 5 It is a partial enlarged schematic diagram of the wind speed sensor 2, the wind direction sensor 3 and the controller 4 in the example of the present invention;

[0030] Figure 6 Schematic side views of four typical forms of incoming flow spoiler devices in the examples of the present invention;

[0031] Figure 7 A comparison chart of wind tunnel test results of the average mid-span shape coefficients of five large-span flexible photovoltaic arrays at various wind direction angles in the examples of the present invention;

[0032] Figure 8 This is a comparison chart of wind tunnel test results of average shape coefficients of side spans of five large-span flexible photovoltaic arrays at various wind direction angles in the examples of the present invention.

[0033] The reference numerals in the figure are: spoiler 1, first side panel 1a, second side panel 1b, left and right side panels 1c, front spoiler 11, rear spoiler 12, wind speed sensor 2, wind direction sensor 3, controller 4, large-span flexible photovoltaic array 5, component cable 51, photovoltaic component 52, column 53, cross bar 54, oblique cable 55, middle column 56, fixed plate 57, rotating motor 58. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0035] Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. In addition, it can also be understood that although the efforts made in this development process may be complicated and lengthy, for ordinary technicians in this field related to the content disclosed in this application, some changes in design, manufacturing or production based on the technical content disclosed in this application are just conventional technical means, and should not be understood as insufficient content disclosed in this application.

[0036] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those of ordinary skill in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0037] Unless otherwise defined, the technical terms or scientific terms involved in this application should be understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the" and the like involved in this application do not indicate a quantitative limitation, and may represent the singular or plural. The terms "include", "comprise", "have" and any of their variations involved in this application are intended to cover non-exclusive inclusions; for example, a process, method, system, product or device that includes a series of steps or units (units) is not limited to the listed steps or units, but may also include steps or units that are not listed, or may also include other steps or units inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "multiple" / "several" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships, for example, "A and / or B" can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects before and after are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0038] like Figure 1-5 As shown, the adaptive incoming flow spoiler system for a large-span flexible photovoltaic array of the present invention includes a spoiler device 1, a wind speed sensor 2, a wind direction sensor 3, a controller 4, a plurality of rotating motors 58 and a plurality of fixing plates 57. The wind speed sensor 2 and the wind direction sensor 3 drive the controller 4 to adjust the angle of the spoiler device 1 by sensing the changes in the external wind speed and wind direction. The large-span flexible photovoltaic array 5 includes a component cable 51, a photovoltaic component 52, a column 53, a crossbar 54, an inclined cable 55, a center column 56 and other structures.

[0039] The component cable 51 and the photovoltaic component 52 are connected to the foundation through the columns 53, the crossbar 54 and the inclined cable 55. The columns 53 are evenly arranged on the left and right edges of the long-span flexible photovoltaic array 5, and the lower ends of the columns 53 are connected to the foundation; the crossbar 54 is fixed to the middle and upper parts of the columns 53, and one end of the inclined 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;

[0040] The crossbar 54 is provided with a fixing plate 57, 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 spoiler 1. In a flexible photovoltaic array that spans a large area, the spoiler 1 also needs to be divided into several sections. Then, a crossbar 54 is also provided on the middle 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 spoiler 1 has a corresponding rotating motor 58 for use. Figure 4 shown.

[0041] The controller 4 is installed at the top of the column 53 between the first row and the last row, and the wind speed sensor 2 and the wind direction sensor 3 are fixed to the controller 4. The wind speed sensor 2 receives the wind speed signal of the surrounding environment in real time, and the wind direction sensor 3 is responsible for monitoring the strong wind direction and transmitting the obtained signal to the controller 4, which drives each motor to start running and changes the shape of the spoiler 1 at both ends in real time to improve the wind resistance performance of the large-span flexible photovoltaic bracket array; Figure 5 shown.

[0042] The spoiler 1 undergoes four typical forms during the rotation process. The four forms can be named as > shape, < shape, Γ shape and L shape according to the cross-sectional type. The openings of the > shape and < shape are oriented outward and inward respectively, and the openings of the Γ shape and the L shape are oriented inward. The definition of the incoming wind direction angle is as follows: Figure 1 As shown, Figure 7-Figure 8 The effect diagram of different forms of spoiler devices 1 on the load reduction of flexible photovoltaic array is given. It can be seen from the figure that the >-shaped spoiler device 1 has the best comprehensive load reduction performance, and under different incoming wind direction angles, the spoiler device 1 that is most conducive to the load reduction of the photovoltaic array is different. When the external wind speed sensed by the wind speed sensor 2 is lower than the limit value, the front spoiler device 11 remains in a > shape, and the rear spoiler device 12 remains in a < 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 90°, the wind direction sensor 3 and the controller 4 at the front end start working. The controller 4 receives the signal of the wind direction sensor 3 and controls the rotation of the front end rotation motor 58 according to the information of the wind direction sensor 3. If the incoming wind direction angle is between 0° and 60°, the front spoiler device 1 1 still remains in a > shape, if the incoming wind direction angle is between 60°-90°, the front spoiler 11 is changed to a < shape, and the rear spoiler 12 remains unchanged; if the incoming wind direction angle is between 90°-180°, the wind direction sensor 3 and the controller 4 at the rear end start working, the controller 4 receives the signal of the wind direction sensor 3, and controls the rotation motor 58 at the rear end to rotate according to the information of the wind direction sensor 3, if the incoming wind direction angle is between 120°-180°, the rear spoiler 12 still remains in a < shape, if the incoming wind direction angle is between 90°-120°, the rear spoiler 12 is changed to a > shape, and the front spoiler 11 remains unchanged, so that the load reduction benefit of the spoiler 1 on the large-span flexible photovoltaic support array is maximized at all wind direction angles of 0°-180°.

[0043] The present invention provides a spoiler 1 parallel to the component cable 51 at the front and rear ends of the large-span flexible photovoltaic array 5. The spoiler 1 reduces the wind load on the photovoltaic component 52 by optimizing the wind field around the photovoltaic system, alleviates the wind-induced vibration of the photovoltaic system in a strong wind environment, and effectively improves the wind resistance of the photovoltaic system. Figure 7-Figure 8As shown, after adding the spoiler 1, the body coefficient is significantly reduced compared with the original structure and meets the relevant specifications, proving that the system has a good load reduction effect.

[0044] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

1. An adaptive flow disturbance system for a large-span flexible photovoltaic array, comprising a large-span flexible photovoltaic array (5), characterized in that: The large-span flexible photovoltaic array (5) is provided with a spoiler device (1), a wind speed sensor (2), a wind direction sensor (3) and a controller (4). The spoiler device (1) comprises a front spoiler device (11) and a rear spoiler device (12). The front spoiler device (11) is installed at the front end of the large-span flexible photovoltaic array (5). The left and right ends of the front spoiler device (11) are rotatably matched with the large-span flexible photovoltaic array (5). The rear spoiler device (12) is installed at the rear end of the large-span flexible photovoltaic array (5). The left and right ends of the rear spoiler device (12) are rotatably matched with the large-span flexible photovoltaic array. (5) can be rotatably matched, the front and rear side surfaces of the front spoiler (11) and the rear spoiler (12) are both convex on one side and concave on the other side, the wind speed sensor (2) is used to sense the wind speed, and the wind direction sensor (3) is used to sense the wind direction, the wind speed sensor (2) and the wind direction sensor (3) are both connected to the controller (4), and the controller (4) can control the rotation of the front spoiler (11) and the rear spoiler (12), thereby causing the front spoiler (11) and the rear spoiler (12) to disturb the wind blowing through the large-span flexible photovoltaic array (5).

2. The adaptive flow disturbance system for large-span flexible photovoltaic arrays according to claim 1 is characterized by: The front spoiler device (11) and the rear spoiler device (12) are both composed of a first side panel (1a), a second side panel (1b) and left and right side panels (1c); the first side panel (1a) and the second side panel (1b) are connected to form an L-shaped structure; the left and right side panels (1c) are fixed to the left and right ends of the first side panel (1a) and the second side panel (1b); and the left and right side panels (1c) are rotatably connected to the large-span flexible photovoltaic array (5).

3. The adaptive flow disturbance system for large-span flexible photovoltaic arrays according to claim 2 is characterized by: The large-span flexible photovoltaic array (5) comprises a component cable (51), a photovoltaic component (52), a column (53) and a crossbar (54). The column (53) is provided in a plurality and is divided into two groups on the left and right and fixed to the ground. The crossbar (54) is divided into two groups on the left and right and extends forward and backward and is laterally fixed to the upper part of the corresponding column (53). The photovoltaic component (52) is mounted on the component cable (51), and the two ends of the component cable (51) are respectively fixed to the crossbars (54) on the left and right sides or respectively pass through the crossbars (54) on the left and right sides and are fixed to the ground.

4. The adaptive flow disturbance system for large-span flexible photovoltaic arrays according to claim 3 is characterized by: The large-span flexible photovoltaic array (5) further comprises an inclined cable (55), one end of which is connected to the top of the column (53) and the other end is fixed on the ground, and the inclined cable (55) is arranged at an angle.

5. The adaptive flow disturbance system for large-span flexible photovoltaic arrays according to claim 3 is characterized by: There are a plurality of component cables (51), each of which is connected in series with a plurality of photovoltaic components (52), and the component cables (51) are arranged in parallel front and back.

6. The adaptive flow disturbance system for large-span flexible photovoltaic arrays according to claim 5 is characterized by: The large-span flexible photovoltaic array (5) includes a center column (56), wherein there are a plurality of center columns (56), the center column (56) is fixed to the ground and is located between a left column (53) and a right column (53), and a component cable (51) passes through the upper end of the center column (56), and the center column (56) is used to support the component cable (51).

7. The adaptive flow disturbance system for large-span flexible photovoltaic arrays according to claim 6 is characterized by: 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).

8. The adaptive flow disturbance system for large-span flexible photovoltaic arrays according to claim 7 is characterized in that: A fixing plate (57) is respectively installed at the left and right ends of the column (53) near the front spoiler (11) and the rear spoiler (12), and 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).

9. An adaptive flow disturbance method for large-span flexible photovoltaic arrays, characterized by: The adaptive incoming flow spoiler system for a large-span flexible photovoltaic array as claimed in claim 2 is applied, and the specific method is as follows: assuming that the wind direction is from front to back, when the front spoiler (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 shape facing the large-span flexible photovoltaic array (5) as the inside and the shape facing away from the large-span flexible photovoltaic array (5) as the outside, the opening directions of the > shape and the < shape are outward and inward respectively, and the opening directions of the Γ shape and the L shape are both inward, and 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 in the shape of >, and the rear spoiler (12) is in the shape of <; If the incoming wind direction angle is between 60° and 90°, excluding 90°, the front spoiler (11) is in the shape of < and the rear spoiler (12) is in the shape of <; If the incoming wind direction angle is between 90° and 120°, excluding 120°, the front spoiler (11) is in the shape of >, and the rear spoiler (12) is in the shape of >. If the incoming wind direction angle is between 120° and 180°, excluding 180°, the front spoiler (11) is in the shape of >, and the rear spoiler (12) is in the shape of <.

10. The adaptive flow disturbance method for a large-span flexible photovoltaic array according to claim 9 is characterized by: The limit value of wind speed is: 24.4m / s.

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