Photovoltaic tracking system
By adopting a hybrid design of peripheral multi-point drive and internal few-point drive in the photovoltaic tracking system, combined with the bracket design and material selection for different areas, the problems of stability and cost of photovoltaic tracking bracket system are solved, achieving a dual improvement in stability and economy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ARCTECH SOLAR HOLDING CO LTD
- Filing Date
- 2025-06-10
- Publication Date
- 2026-05-15
AI Technical Summary
Existing photovoltaic tracking bracket systems have high stability but high cost when all systems use multi-point drive, and low stability and poor wind pressure resistance when all systems use single-point drive.
The photovoltaic tracking brackets in the outer area use multi-point drive, while the photovoltaic tracking brackets in the inner area use fewer drive points. By combining the bracket design and material selection in different areas, a hybrid mode of multi-point and single-point drive is formed, which enhances stability and reduces costs.
This improved the overall stability and wind pressure resistance of the photovoltaic tracking system while reducing system costs, achieving a balance between performance and economy.
Smart Images
Figure CN224249638U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of photovoltaic power generation technology, and more particularly to a photovoltaic tracking system. Background Technology
[0002] A photovoltaic (PV) tracking system is a system that automatically tracks the movement of the sun and adjusts the angle of PV modules to maximize the reception of sunlight. The working principle of a PV tracking system is to fix the PV modules to a tracking bracket, and then control the tracking bracket via a tracker to adjust the angle of the PV modules, thereby maximizing the reception of sunlight.
[0003] Currently, in photovoltaic tracking bracket arrays, photovoltaic tracking brackets generally adopt multi-point drive or single-point drive. When photovoltaic tracking brackets adopt multi-point drive, although the stability is high and it can withstand strong winds, the number of rotary reducers is large, and if a problem occurs, the failure rate is high and maintenance and rectification are troublesome. When photovoltaic tracking brackets adopt single-point drive, only one rotary reducer is subjected to force. Although the cost is low, the stability is low and the wind pressure resistance is small. Utility Model Content
[0004] The purpose of this application is to provide a photovoltaic tracking system that can ensure the stability and strength of the entire system while reducing costs.
[0005] The technical solution provided in this application is as follows:
[0006] A photovoltaic tracking system includes:
[0007] A photovoltaic tracking bracket array, comprising a first photovoltaic tracking bracket located in an outer area and a second photovoltaic tracking bracket located in an inner area; both the first and second photovoltaic tracking brackets employ multi-point drive, and the number of drive points of the second photovoltaic tracking bracket is less than the number of drive points of the first photovoltaic tracking bracket.
[0008] In some embodiments, the cross-sectional area of the drive column of the first photovoltaic tracking bracket is larger than the cross-sectional area of the drive column of the second photovoltaic tracking bracket.
[0009] In some embodiments, the wall thickness of the main shaft of the first photovoltaic tracking bracket is greater than the wall thickness of the main shaft of the second photovoltaic tracking bracket; and / or;
[0010] The wall thickness of the purlin of the first photovoltaic tracking bracket is greater than the wall thickness of the purlin of the second photovoltaic tracking bracket.
[0011] In some embodiments, when the number of rows of the first photovoltaic tracking bracket is greater than or equal to two, a motor and a drive mechanism are provided at at least one drive point position of each row of the first photovoltaic tracking bracket, and the motor is driven to the drive mechanism; or a motor and a drive mechanism are provided at at least one drive point position on one row of the first photovoltaic tracking bracket, and the motor is driven to the drive mechanism, and the motor and the drive mechanism together drive multiple rows of the first photovoltaic tracking bracket to rotate synchronously.
[0012] and / or;
[0013] When the number of rows of the second photovoltaic tracking bracket is greater than or equal to two, a motor and a drive mechanism are provided at at least one drive point position of each row of the second photovoltaic tracking bracket, and the motor is driven and connected to the drive mechanism; or a motor and a drive mechanism are provided at at least one drive point position on one row of the second photovoltaic tracking bracket, and the motor is driven and connected to the drive mechanism, and the motor and the drive mechanism together drive multiple rows of the second photovoltaic tracking bracket to rotate synchronously.
[0014] In some embodiments, any one drive point of the first photovoltaic tracking bracket in each row is a first master drive point, and the remaining drive points are first slave drive points. A first motor and a first active drive mechanism are provided at the first master drive point, and a first driven drive mechanism is provided at the first slave drive point. The first active drive mechanism and the first driven drive mechanism are connected by a first synchronous shaft transmission; and / or;
[0015] Any one of the driving points of the second photovoltaic tracking bracket in each row is the second main driving point, and the remaining driving points are the second slave driving points. A second motor and a second active driving mechanism are set at the position of the second main driving point, and a second passive driving mechanism is set at the position of the second slave driving point. The second active driving mechanism and the second passive driving mechanism are connected by a second synchronous shaft.
[0016] In some embodiments, all drive points of the first photovoltaic tracking bracket in each row are equipped with a motor and a drive mechanism; and / or;
[0017] Each drive point of the second photovoltaic tracking bracket in each row is equipped with a motor and drive mechanism.
[0018] In some embodiments, the photovoltaic tracking bracket array further includes a third photovoltaic tracking bracket located in the deep inner region. The third photovoltaic tracking bracket employs single-point drive or multi-point drive, and the number of drive points of the third photovoltaic tracking bracket is less than the number of drive points of the second photovoltaic tracking bracket.
[0019] In some embodiments, a first channel is formed between adjacent first photovoltaic tracking brackets along the length direction of the first photovoltaic tracking bracket;
[0020] Along the length of the first photovoltaic tracking bracket, second channels are formed between adjacent first photovoltaic tracking brackets and second photovoltaic tracking brackets, between two adjacent second photovoltaic tracking brackets, between adjacent second photovoltaic tracking brackets and third photovoltaic tracking brackets, and between two adjacent third photovoltaic tracking brackets.
[0021] The first channel and the second channel are configured in a one-to-one correspondence.
[0022] In some embodiments, the projection of the second photovoltaic tracking bracket in the windward direction is located within the projection range of the first photovoltaic tracking bracket in the windward direction.
[0023] In some embodiments, the stopping angle of the second photovoltaic tracking bracket is the same as that of the first photovoltaic tracking bracket; or the stopping angle of the second photovoltaic tracking bracket is less than that of the first photovoltaic tracking bracket.
[0024] The technical advantages of this application are as follows: Both the first photovoltaic tracking bracket in the outer area and the second photovoltaic tracking bracket in the inner area adopt multi-point drive, which is different from single-point drive, greatly improving the stability and wind pressure resistance of the photovoltaic tracking brackets. At the same time, the outer area uses a larger number of drive points. Under the influence of strong winds, the larger number of drive points form multiple locking points, improving the structural stability and wind resistance of the photovoltaic tracking brackets in the outer area. This helps to resist and attenuate wind force and acts as a windbreak, reducing the wind force on the photovoltaic tracking brackets in the inner area. In this way, the stability of the photovoltaic tracking brackets in the inner area can also be guaranteed, improving the stability and reliability of the entire system. The number of drive points of the photovoltaic tracking brackets in the inner area is less than that in the outer area. While ensuring stability, the number of drive mechanisms is greatly reduced. Moreover, the proportion of photovoltaic tracking brackets in the inner area in the entire system is high, which can effectively reduce system costs and make the total cost more competitive. Attached Figure Description
[0025] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments:
[0026] Figure 1 This is a schematic diagram of the distribution of a photovoltaic tracking system provided in one embodiment of this application;
[0027] Figure 2 This is a schematic diagram of the distribution of a photovoltaic tracking system provided in another embodiment of this application;
[0028] Figure 3 This is a schematic diagram of the driving method of a photovoltaic tracking system provided in an embodiment of this application;
[0029] Figure 4 This is a schematic diagram of a driving method for a photovoltaic tracking system provided in another embodiment of this application;
[0030] Figure 5 This is a side view of a photovoltaic tracking bracket with a photovoltaic module installed, provided in one embodiment of this application.
[0031] Explanation of icon numbers:
[0032] 100. Photovoltaic tracking bracket array; 110. Outer area; 111. First photovoltaic tracking bracket; 120. Inner area; 121. Second photovoltaic tracking bracket; 130. Driving point; 131. First main driving point; 132. First slave driving point; 133. Second main driving point; 134. Second slave driving point; 140. First channel; 150. Second channel; 200. Photovoltaic module. Detailed Implementation
[0033] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application can also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.
[0034] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the specific implementation methods of this application will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort.
[0035] To keep the drawings concise, each drawing only schematically shows the parts relevant to this application, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."
[0036] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.
[0037] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; or they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0038] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, left, right, front, and back) are relative rather than absolute when describing the structure and movement of the various components, and are not intended to limit the direction of the product during actual use.
[0039] Furthermore, in the description of this application, ordinal numbers, such as "first" and "second," are used only to distinguish related objects and should not be construed as indicating or implying the relative importance or order between related objects.
[0040] like Figure 1 As shown, in one or more embodiments, this disclosure provides a photovoltaic tracking system, including a photovoltaic tracking bracket array 100. The photovoltaic tracking bracket array 100 includes a first photovoltaic tracking bracket 111 located in a peripheral region 110 and a second photovoltaic tracking bracket 121 located in an inner region 120. Both the first photovoltaic tracking bracket 111 and the second photovoltaic tracking bracket 121 adopt multi-point driving, and the number of driving points 130 of the second photovoltaic tracking bracket 121 is less than the number of driving points 130 of the first photovoltaic tracking bracket 111.
[0041] A photovoltaic tracking bracket array 100 refers to a series of photovoltaic tracking brackets arranged in an array, i.e., multiple photovoltaic tracking brackets arranged in multiple rows and columns. In this embodiment, the photovoltaic tracking bracket array 100 includes multiple first photovoltaic tracking brackets 111 located in the outer region 110 and multiple second photovoltaic tracking brackets 121 located in the inner region 120. That is, in the photovoltaic tracking bracket array 100, the area where all the first photovoltaic tracking brackets 111 are located is the outer region 110 of the photovoltaic tracking bracket array 100, and the area where all the second photovoltaic tracking brackets 121 are located is the inner region 120 of the photovoltaic tracking bracket array 100. The outer region 110 and the inner region 120 of the photovoltaic tracking bracket array 100 can be divided according to the degree of wind impact on the photovoltaic tracking brackets under extreme weather conditions. For example, the area where the photovoltaic tracking brackets are subjected to greater wind loads is divided into the outer region 110, and the area where the photovoltaic tracking brackets are subjected to less wind loads is divided into the inner region 120. The inner region 120 is located inside the outer region 110. The specific division method of the outer area 110 and inner area 120 of the photovoltaic tracking bracket array 100 can refer to the division method in the prior art, for example, the prior application "202011600085.9". Of course, other division methods in the prior art can also be referred to. This application does not limit the specific division method of the outer area 110 and inner area 120 of the photovoltaic tracking bracket array 100, as long as a suitable outer area 110 and inner area 120 can be divided according to the terrain and climate of the project site.
[0042] For example, such as Figure 1 As shown, the outer region 110 is located on the windward side of the inner region 120 or is positioned opposite each other on both sides of the inner region 120 along the windward direction; or, as... Figure 2As shown, the outer area 110 is located around the inner area 120. The outer area 110 is situated at the edge of the photovoltaic tracking bracket array 100. Depending on the prevailing wind direction at the project site, a first photovoltaic tracking bracket 111 with a large number of drive points 130 can be installed on one or more sides of the photovoltaic tracking bracket that are constantly exposed to wind. Alternatively, a first photovoltaic tracking bracket 111 with a large number of drive points 130 can be installed around all four edges of the photovoltaic tracking bracket array 100. Considering both tailwind and headwind factors, when the location of the photovoltaic tracking bracket array 100 is consistently exposed to winds from a single direction, the outer area 110 is located on the side of the inner area 120 facing the wind direction, or the outer area 110 is symmetrically positioned outside the inner area 120 along the wind direction. When the location of the photovoltaic tracking bracket array 100 is consistently exposed to winds from multiple directions, the outer area 110 is positioned around the inner area 120. In other words, the outer area 110 can be located on one or more sides of the inner area 120 in the circumferential direction. The first photovoltaic tracking bracket 111 in the outer area 110 is located on the outer periphery of the photovoltaic tracking bracket array 100 and is greatly affected by the wind; the second photovoltaic tracking bracket 121 in the inner area 120 is located on the inner periphery of the photovoltaic tracking bracket array 100 and is less affected by the wind.
[0043] In this embodiment, both the first photovoltaic tracking bracket 111 located in the outer region 110 and the second photovoltaic tracking bracket 121 located in the inner region 120 are driven by multiple points. The second photovoltaic tracking bracket 121 in the inner region 120 has fewer driving points 130 than the first photovoltaic tracking bracket 111 in the outer region 110. Multi-point driving means that multiple driving points 130 simultaneously drive the main shaft of a photovoltaic tracking bracket to rotate. These multiple driving points 130 are spaced apart along the axial direction of the main shaft, and are connected to the main shaft of the corresponding photovoltaic tracking bracket to form multiple fixed locking points.
[0044] Since the number of drive points 130 in the first photovoltaic tracking bracket 111 is greater than that in the second photovoltaic tracking bracket 121, when affected by strong winds, the larger number of drive points 130 in the first photovoltaic tracking bracket 111 forms multiple fixed locking points, which greatly reduces the vibration of the first photovoltaic tracking bracket 111, improves the structural stability and wind resistance of the first photovoltaic tracking bracket 111, and can disperse wind pressure and wind torsion, so that the first photovoltaic tracking bracket 111 in the outer area 110 can be used to resist and attenuate wind force, acting as a windbreak wall, reducing the wind force on the second photovoltaic tracking bracket 121 in the inner area 120, and making the wind pressure on the second photovoltaic tracking bracket 121 smaller. In this way, when the second photovoltaic tracking bracket 121 is driven by a relatively smaller number of drive points 130, its stability can also be guaranteed. Furthermore, since the number of second photovoltaic tracking brackets 121 in the inner area 120 is higher, fewer drive points are set in the second photovoltaic tracking brackets 121 in the inner area 120, reducing the number of drive mechanisms, thereby making the total cost of the entire photovoltaic tracking system lower and more competitive.
[0045] In some embodiments, the cross-sectional area of the drive column of the first photovoltaic tracking bracket 111 is larger than the cross-sectional area of the drive column of the second photovoltaic tracking bracket 121. For example, when the drive column is made of H-beams, the dimensions of the drive column of the second photovoltaic tracking bracket 121, including thickness and other dimensions, can be smaller than the corresponding dimensions of the drive column of the first photovoltaic tracking bracket 111.
[0046] In this embodiment, the driving column refers to the column corresponding to the driving point (including the main driving point and the slave driving point), while other columns are ordinary columns. The driving column has a larger cross-sectional area, which makes the bending and torsional strength of the driving column of the first photovoltaic tracking bracket 111 better than that of the driving column of the second photovoltaic tracking bracket 121. The first photovoltaic tracking bracket 111 can withstand a larger load and remain stable when facing strong winds and other large external forces, reducing the risk of deformation and damage and enhancing the stability of the photovoltaic tracking system. The driving column of the second photovoltaic tracking bracket 121 has a relatively smaller cross-sectional area, which can reduce the material cost of the photovoltaic tracking bracket.
[0047] In some embodiments, the wall thickness of the main shaft of the first photovoltaic tracking bracket 111 is greater than that of the main shaft of the second photovoltaic tracking bracket 121. The larger wall thickness of the main shaft of the first photovoltaic tracking bracket 111 results in a more uniform stress distribution under the same load. Furthermore, it allows the bracket to withstand greater bending moments and shear forces when subjected to external forces such as strong winds, effectively reducing the risk of deformation or even breakage of the main shaft due to excessive load. This ensures the structural stability of the first photovoltaic tracking bracket 111 and extends its service life.
[0048] The second photovoltaic tracking bracket 121 is located inside the first photovoltaic tracking bracket 111. The first photovoltaic tracking bracket 111 acts as a windbreak, reducing the wind force on the second photovoltaic tracking bracket 121 in the inner area 120, thus reducing the wind pressure on the second photovoltaic tracking bracket 121. The main shaft wall thickness of the second photovoltaic tracking bracket 121 is small, which will not seriously affect the structural stability of the second photovoltaic tracking bracket 121 and will greatly reduce the cost. This arrangement allows the first photovoltaic tracking bracket 111 and the second photovoltaic tracking bracket 121 to play their respective advantages in different positions, achieving a balance between performance and economy.
[0049] Furthermore, the purlin wall thickness of the first photovoltaic tracking bracket 111 is greater than that of the purlin wall thickness of the second photovoltaic tracking bracket 121. The larger purlin wall thickness of the first photovoltaic tracking bracket 111 provides higher bending and torsional stiffness. Under the influence of external forces such as strong winds, the thicker purlin can better resist deformation, maintain the flatness and stability of the photovoltaic module, reduce the risk of damage to the photovoltaic module due to purlin deformation, and ensure the normal operation of the photovoltaic tracking system. The smaller purlin wall thickness of the second photovoltaic tracking bracket 121 reduces material costs. At the same time, the second photovoltaic tracking bracket 121 experiences relatively lower wind pressure in its inner region 120. Therefore, the reduced purlin wall thickness of the second photovoltaic tracking bracket 121 will not seriously affect its structural stability, making cost optimization more reliable.
[0050] In some embodiments, such as Figure 3 As shown, when the number of rows of the first photovoltaic tracking bracket 111 is greater than or equal to two, each row of the first photovoltaic tracking bracket 111 has at least one drive point 130 position equipped with a motor and a drive mechanism. The motor and the drive mechanism are connected in transmission, and the motor drives the drive mechanism to drive the main shaft of the corresponding row of the first photovoltaic tracking bracket 111 to rotate. That is, the main shaft of each row of the first photovoltaic tracking bracket 111 is independently driven by the motor set in its respective row. Or, as Figure 4 As shown, a motor and a drive mechanism are installed at at least one drive point 130 position on one row of first photovoltaic tracking brackets 111. The motor and the drive mechanism are connected in transmission, and the drive mechanism at the motor position is the active drive mechanism. The other rows of first photovoltaic tracking brackets 111 do not have motors, but only drive mechanisms, which are the driven drive mechanisms. The combination of the motor and drive mechanism installed on one row of first photovoltaic tracking brackets 111 drives the main shafts of multiple rows of first photovoltaic tracking brackets 111 to rotate synchronously through a synchronous shaft.
[0051] like Figure 3As shown, when the number of rows of the second photovoltaic tracking bracket 121 is greater than or equal to two, each row of the second photovoltaic tracking bracket 121 has at least one drive point 130 position equipped with a motor and drive mechanism. The motor is connected to the drive mechanism, and the motor drives the drive mechanism to rotate the corresponding row of first photovoltaic tracking brackets 111. That is, each row of the second photovoltaic tracking bracket 121 is independently driven by the motor and drive mechanism set in its own row. Or, as Figure 4 As shown, a motor and drive mechanism are provided at at least one drive point 130 position on one row of second photovoltaic tracking brackets 121. The other rows of second photovoltaic tracking brackets 121 do not have motors, but only drive mechanisms. The combination of the motor and drive mechanism provided on one row of second photovoltaic tracking brackets 121 drives multiple rows of second photovoltaic tracking brackets 121 to rotate synchronously through a synchronous shaft.
[0052] In this embodiment, whether the first photovoltaic tracking bracket 111 and the second photovoltaic tracking bracket 121 are driven independently for each row, or whether multiple rows of photovoltaic tracking brackets are driven synchronously by a motor on one of the rows of photovoltaic tracking brackets, can be selected according to the actual needs of the project, thereby improving the flexibility of project setup.
[0053] In some embodiments, such as Figure 3 As shown, any one of the drive points 130 of the first photovoltaic tracking bracket 111 in each row is the first main drive point 131, and the remaining drive points 130 are the first slave drive points 132. A first motor and a first active drive mechanism are set at the first main drive point 131, and a first driven drive mechanism is set at the first slave drive point 132. The first active drive mechanism and the first driven drive mechanism are connected by a first synchronous shaft transmission; and / or;
[0054] Any one of the drive points 130 of the second photovoltaic tracking bracket 121 in each row is the second main drive point 133, and the remaining drive points 130 are the second slave drive points 134. A second motor and a second active drive mechanism are set at the position of the second main drive point 133, and a second driven mechanism is set at the position of the second slave drive point 134. The second active drive mechanism and the second driven mechanism are connected by a second synchronous shaft.
[0055] In this embodiment, drive point 130 refers to a position on the photovoltaic tracking bracket where a drive mechanism or motor is connected to the drive mechanism to form a combination. Depending on the application environment, drive points are divided into active drive points and passive drive points. Active drive points are equipped with a motor and an active drive mechanism, while passive drive points are not equipped with a motor but only a passive drive mechanism. For example, a synchronous shaft is provided between the first active drive mechanism and the first passive drive mechanism to transmit power between them. The first active drive mechanism can be a worm gear transmission mechanism. The output end of the first motor is connected to the input end of the worm gear transmission mechanism, driving the worm gear transmission mechanism under the drive of the first motor. The worm gear transmission mechanism includes multiple sets of worm gears, thus forming a first power output end and a second power output end. The first power output end is connected to the main shaft at the first main drive point of the first photovoltaic tracking bracket 111, thereby driving the main shaft of the first photovoltaic tracking bracket 111 to rotate. The second power output end is transmitted to one end of the synchronous shaft, transmitting power to the first passive drive mechanism through the synchronous shaft. Similar to the structure of the first active drive mechanism, the synchronous shaft is driven by the input end of the first driven mechanism, thereby transmitting power to the first driven mechanism. The first power output end of the first driven mechanism is connected to the main shaft at the first driven point of the first photovoltaic tracking bracket 111, and the second power output end of the first driven mechanism is driven by the synchronous shaft of the next segment, thereby realizing the synchronous drive of the first photovoltaic tracking bracket 111 at multiple drive points 130. Specifically, the specific structure of the first active drive mechanism and the first driven mechanism using multiple sets of worm gears to achieve multi-point parallel drive can be found in prior applications such as "201911013335.6", "201911406319.3" and "202120139075.3". By setting one motor to drive one of the multiple drive mechanisms, and then transmitting the power of the motor to the other multiple driven mechanisms through the synchronous shaft, multi-point drive is formed. Using only one motor can greatly reduce costs.
[0056] It is understandable that, in addition to worm gear transmission mechanisms, transmission mechanisms can also adopt gear transmission, electric actuator transmission, and other transmission methods. Gear transmission and electric actuator transmission mechanisms are existing technologies and will not be elaborated here.
[0057] Furthermore, the multi-point transmission method of the second photovoltaic tracking bracket 121 is the same as that of the first photovoltaic tracking bracket 111, and will not be described again here.
[0058] Furthermore, the first main drive point 131 can be located at any position on the main axis of the first photovoltaic tracking bracket 111, and the first slave drive point 132 can be symmetrically or asymmetrically arranged relative to the first main drive point 131. The second main drive point 133 can be located at any position on the main axis of the second photovoltaic tracking bracket 121, and the second slave drive point 134 can be symmetrically or asymmetrically arranged relative to the second main drive point 133.
[0059] In some embodiments, a motor and drive mechanism are provided at all drive points 130 positions of each row of the first photovoltaic tracking bracket 111; and / or, a motor and drive mechanism are provided at all drive points 130 positions of each row of the second photovoltaic tracking bracket 121. The fact that each drive point 130 of the first photovoltaic tracking bracket 111 and the second photovoltaic tracking bracket 121 is equipped with a motor and drive mechanism eliminates the need for a synchronous shaft between multiple drive points 130 in the same row. This arrangement can improve tracking accuracy but increases equipment cost.
[0060] In some embodiments, the photovoltaic tracking bracket array 100 further includes a third photovoltaic tracking bracket located in a deep inner region. The third photovoltaic tracking bracket employs single-point or multi-point drive, and the number of drive points 130 of the third photovoltaic tracking bracket is less than the number of drive points 130 of the second photovoltaic tracking bracket 121. The deep inner region is located inside the inner region 120, and the third photovoltaic tracking bracket in the deep inner region experiences less wind force. Therefore, the third photovoltaic tracking bracket can employ single-point drive or have fewer drive points 130 than the second photovoltaic tracking bracket 121.
[0061] In some embodiments, such as Figure 1 and Figure 2As shown, along the length direction of the first photovoltaic tracking bracket 111, a first channel 140 is formed between adjacent first photovoltaic tracking brackets 111; along the length direction of the first photovoltaic tracking bracket 111, a second channel 150 is formed between adjacent first photovoltaic tracking brackets 111 and second photovoltaic tracking brackets 121, between two adjacent second photovoltaic tracking brackets 111, between adjacent second photovoltaic tracking brackets 121 and third photovoltaic tracking brackets, and between two adjacent third photovoltaic tracking brackets; the first channel 140 and the second channel 150 are set in a one-to-one correspondence to form an artificial channel, which facilitates subsequent maintenance of the first photovoltaic tracking brackets 111, second photovoltaic tracking brackets 121 and third photovoltaic tracking brackets. Furthermore, the first channel 140 and the second channel 150 are configured in a one-to-one correspondence. That is, each column of the first photovoltaic tracking bracket 111 in the outer area 110 is configured in a corresponding column of the second photovoltaic tracking bracket 121 and the third photovoltaic tracking bracket. This allows the first photovoltaic tracking bracket 111 in the outer area 110 to shield the second photovoltaic tracking bracket 121 in the inner area 120 and the third photovoltaic tracking bracket in the deep inner area, thereby reducing the wind force on the second photovoltaic tracking bracket 121 in the inner area 120 and the third photovoltaic tracking bracket in the deep inner area, and preventing strong winds from blowing from the first channel 140 to the second photovoltaic tracking bracket 121 and the third photovoltaic tracking bracket.
[0062] In some embodiments, the projection of the second photovoltaic tracking bracket 121 in the windward direction is within the projection range of the first photovoltaic tracking bracket 111 in the windward direction. That is, along the main axis of the photovoltaic tracking bracket, the overall length of the second photovoltaic tracking bracket 121 is less than or equal to the overall length of the first photovoltaic tracking bracket 111. This allows the first photovoltaic tracking bracket 111 located in the outer region 110 to provide wind protection for the second photovoltaic tracking bracket 121 in the inner region 120, preventing the edge areas of the second photovoltaic tracking bracket 121 in the inner region 120 from being unshielded by the first photovoltaic tracking bracket 111 and thus avoiding wind damage to the second photovoltaic tracking bracket 121, thereby improving the stability of the entire photovoltaic tracking system. When the photovoltaic tracking bracket array also includes a third photovoltaic tracking bracket located in the deep inner region, the projection of the third photovoltaic tracking bracket in the windward direction is within the projection range of the second photovoltaic tracking bracket in the windward direction.
[0063] When photovoltaic modules 200 are installed on the main shaft of a photovoltaic tracking bracket, the photovoltaic modules 200 installed on the first photovoltaic tracking bracket 111 form a first photovoltaic tracking system, and the photovoltaic modules 200 installed on the second photovoltaic tracking bracket 121 form a second photovoltaic tracking system. When the overall length of the photovoltaic modules 200 installed on the main shaft is greater than the length of the main shaft, it is necessary to ensure that the projection of the second photovoltaic tracking system in the windward direction is completely located within the projection of the first photovoltaic tracking system in the windward direction. In other words, it is necessary to ensure that the overall length of the second photovoltaic tracking system is less than or equal to the overall length of the first photovoltaic tracking system.
[0064] In some embodiments, the stopping angle of the second photovoltaic tracking bracket 121 is consistent with the stopping angle of the first photovoltaic tracking bracket 111. The stopping angle refers to the angle required to rotate the main shaft of the photovoltaic tracking bracket when encountering strong winds. This rotation aims to turn the photovoltaic module 200 mounted on the main shaft to a specific angle to reduce damage to the photovoltaic tracking bracket and the photovoltaic module 200 from strong winds. This specific angle is called the wind protection angle, also known as the stopping angle, which is the angle between the photovoltaic module 200 and the horizontal plane. For example, when the stopping angle is 0 degrees, the photovoltaic module 200 is in a flat position; when the stopping angle is 5 degrees, the angle between the photovoltaic module 200 and the horizontal plane is 5 degrees; and when the stopping angle is 10 degrees, the angle between the photovoltaic module 200 and the horizontal plane is 10 degrees.
[0065] When the high wind protection mode is active, the photovoltaic module 200 will remain at this docking angle until the high wind protection mode is deactivated. When the high wind protection mode is not active, the angle of the photovoltaic module 200 can also be adjusted to the docking angle at night when the photovoltaic tracking bracket is not in operation. The docking angle can be 0 degrees or other angles such as 10 degrees, 15 degrees, 20 degrees, etc. Figure 5 The diagram shows the state of the photovoltaic modules when the docking angle is 15 degrees. The specific docking angles of the first photovoltaic tracking bracket 111 and the second photovoltaic tracking bracket 121 can be determined according to the project requirements, and this embodiment does not impose specific limitations.
[0066] The stopping angle of the second photovoltaic tracking bracket 121 is the same as that of the first photovoltaic tracking bracket 111, so that the first photovoltaic tracking bracket 111 in the outer area 110 has a shading effect on the second photovoltaic tracking bracket 121 in the entire inner area 120, thereby improving the stability of the second photovoltaic tracking bracket 121 in the inner area 120. Compared to schemes where the second photovoltaic tracking bracket 121 and the first photovoltaic tracking bracket 111 have different stopping angles, for example, when there are many rows of second photovoltaic tracking brackets 121, the stopping angle of the first photovoltaic tracking bracket 111 located in the outer area 110 is large, while the stopping angle of the second photovoltaic tracking bracket 121 located in the inner area 120 is small. In this case, the outer area 110 will block the first few rows of second photovoltaic tracking brackets 121 in the inner area 120. However, when the wind flows around the first photovoltaic tracking bracket 111, the airflow channel above the first photovoltaic tracking bracket 111 becomes relatively narrow. According to Bernoulli's principle (where the flow velocity is high, the pressure is low), the speed of this part of the airflow will increase, and the pressure will relatively decrease. However, near the ground below the first photovoltaic tracking bracket 111, the airflow is affected relatively slowly by ground friction, and the pressure is relatively high. This pressure difference between the upper and lower sides causes air to flow from the lower pressure to the upper pressure, forming a downwash airflow. This causes the wind to sink within a certain distance behind the first photovoltaic tracking bracket 111, which may cause the second photovoltaic tracking bracket 121, starting from the middle rows, to be more affected by the wind and become unstable.
[0067] Therefore, when the number of rows of the second photovoltaic tracking brackets 121 in the inner area 120 is small, the stopping angle of the second photovoltaic tracking brackets 121 can be smaller than the stopping angle of the first photovoltaic tracking brackets 111, so that the first photovoltaic tracking brackets 111 in the outer area 110 can shield all the second photovoltaic tracking brackets 121 in the inner area 120, thereby improving the stability of the entire photovoltaic tracking system.
[0068] It should also be noted that the terms "multiple" or "multiple points" mentioned in the above description refer to two, three, or other quantities.
[0069] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.
[0070] It should be noted that the above embodiments can be freely combined as needed. The above description is only a preferred embodiment of this application. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the protection scope of this application.
Claims
1. A photovoltaic tracking system, characterized in that, include: A photovoltaic tracking bracket array, comprising a first photovoltaic tracking bracket located in an outer area and a second photovoltaic tracking bracket located in an inner area; both the first and second photovoltaic tracking brackets employ multi-point drive, and the number of drive points of the second photovoltaic tracking bracket is less than the number of drive points of the first photovoltaic tracking bracket.
2. The photovoltaic tracking system according to claim 1, characterized in that, The cross-sectional area of the drive column of the first photovoltaic tracking bracket is greater than that of the drive column of the second photovoltaic tracking bracket.
3. A photovoltaic tracking system according to claim 1, characterized in that, The wall thickness of the main shaft of the first photovoltaic tracking bracket is greater than the wall thickness of the main shaft of the second photovoltaic tracking bracket; and / or; The wall thickness of the purlin of the first photovoltaic tracking bracket is greater than the wall thickness of the purlin of the second photovoltaic tracking bracket.
4. A photovoltaic tracking system according to claim 1, characterized in that, When the number of rows of the first photovoltaic tracking bracket is greater than or equal to two, a motor and a drive mechanism are provided at at least one drive point position of each row of the first photovoltaic tracking bracket, and the motor is driven and connected to the drive mechanism; or a motor and a drive mechanism are provided at at least one drive point position on one row of the first photovoltaic tracking bracket, and the motor is driven and connected to the drive mechanism, and the motor and the drive mechanism together drive multiple rows of the first photovoltaic tracking brackets to rotate synchronously; and / or; When the number of rows of the second photovoltaic tracking bracket is greater than or equal to two, a motor and a drive mechanism are provided at at least one drive point position of each row of the second photovoltaic tracking bracket, and the motor is driven and connected to the drive mechanism; or a motor and a drive mechanism are provided at at least one drive point position on one row of the second photovoltaic tracking bracket, and the motor is driven and connected to the drive mechanism, and the motor and the drive mechanism together drive multiple rows of the second photovoltaic tracking bracket to rotate synchronously.
5. A photovoltaic tracking system according to any one of claims 1-4, characterized in that, Any one of the driving points of the first photovoltaic tracking bracket in each row is the first master driving point, and the remaining driving points are the first slave driving points. A first motor and a first active driving mechanism are set at the first master driving point, and a first driven mechanism is set at the first slave driving point. The first active driving mechanism and the first driven mechanism are connected by a first synchronous shaft; and / or. Any one of the driving points of the second photovoltaic tracking bracket in each row is the second main driving point, and the remaining driving points are the second slave driving points. A second motor and a second active driving mechanism are set at the position of the second main driving point, and a second passive driving mechanism is set at the position of the second slave driving point. The second active driving mechanism and the second passive driving mechanism are connected by a second synchronous shaft.
6. A photovoltaic tracking system according to any one of claims 1-4, characterized in that, Each drive point of the first photovoltaic tracking bracket in each row is equipped with a motor and drive mechanism; and / or; Each drive point of the second photovoltaic tracking bracket in each row is equipped with a motor and drive mechanism.
7. A photovoltaic tracking system according to claim 1, characterized in that, The photovoltaic tracking bracket array also includes a third photovoltaic tracking bracket located in the deep inner area. The third photovoltaic tracking bracket adopts single-point drive or multi-point drive, and the number of drive points of the third photovoltaic tracking bracket is less than the number of drive points of the second photovoltaic tracking bracket.
8. A photovoltaic tracking system according to claim 7, characterized in that, Along the length direction of the first photovoltaic tracking bracket, a first channel is formed between adjacent first photovoltaic tracking brackets; Along the length of the first photovoltaic tracking bracket, second channels are formed between adjacent first photovoltaic tracking brackets and second photovoltaic tracking brackets, between two adjacent second photovoltaic tracking brackets, between adjacent second photovoltaic tracking brackets and third photovoltaic tracking brackets, and between two adjacent third photovoltaic tracking brackets. The first channel and the second channel are configured in a one-to-one correspondence.
9. A photovoltaic tracking system according to claim 1, characterized in that, The projection of the second photovoltaic tracking bracket in the windward direction is located within the projection range of the first photovoltaic tracking bracket in the windward direction.
10. A photovoltaic tracking system according to claim 1, characterized in that... The stopping angle of the second photovoltaic tracking bracket is the same as that of the first photovoltaic tracking bracket; or the stopping angle of the second photovoltaic tracking bracket is less than that of the first photovoltaic tracking bracket.