Photovoltaic tracking system

Abstract

The invention belongs to the field of photovoltaic power generation, and discloses a photovoltaic tracking system which comprises a photovoltaic tracking support array which comprises a first photovoltaic tracking support located in a peripheral area and a second photovoltaic tracking support located in an inner area. The first photovoltaic tracking support adopts multi-point driving, and the second photovoltaic tracking support adopts single-point driving. The photovoltaic tracking bracket in the peripheral area adopts multi-point driving, and a plurality of driving points form a plurality of locking points under the influence of strong wind, so that the structural stability and wind resistance of the photovoltaic tracking bracket in the peripheral area are improved, and the photovoltaic tracking bracket is used for resisting and attenuating wind power and serves as a wind-shield wall; the wind power of the photovoltaic tracking support in the inner surrounding area is reduced, the stability of the photovoltaic tracking support in the inner surrounding area can be guaranteed, the stability and reliability of the whole system are improved, the system cost is reduced, and the total cost is more competitive.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic power generation, and in particular to a photovoltaic tracking system. Background Art

[0002] The photovoltaic tracking system is a system that can automatically track the movement of the sun and adjust the angle of the photovoltaic modules to maximize the reception of sunlight. The working principle of the photovoltaic tracking system is to fix the photovoltaic modules on the photovoltaic tracking bracket and control the photovoltaic tracking bracket through the tracker to adjust the angle of the photovoltaic modules to maximize the reception of sunlight.

[0003] At present, in the photovoltaic tracking bracket array, the photovoltaic tracking brackets generally all adopt multi-point drive or all adopt single-point drive; when the photovoltaic tracking brackets all adopt multi-point drive, although the stability is high and can withstand strong winds, the number of rotary reducers is large. If problems occur, the failure rate is high and the maintenance and rectification are troublesome; when the photovoltaic tracking brackets all adopt single-point drive, the single-point drive has only one rotary reducer under force. Although the cost is low, the stability is low and the ability to resist wind pressure is small. Summary of the invention

[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 solutions provided by this application are as follows:

[0006] A photovoltaic tracking system, comprising:

[0007] A photovoltaic tracking bracket array, the photovoltaic tracking bracket array includes a first photovoltaic tracking bracket located in a peripheral area and a second photovoltaic tracking bracket located in an inner area; the first photovoltaic tracking bracket adopts multi-point drive, and the second photovoltaic tracking bracket adopts single-point drive.

[0008] In some embodiments, along the length direction of the first photovoltaic tracking bracket, a first channel is formed between adjacent first photovoltaic tracking brackets;

[0009] Along the length direction of the first photovoltaic tracking bracket, second channels are formed between adjacent second photovoltaic tracking brackets and between the first photovoltaic tracking bracket and the adjacent second photovoltaic tracking bracket respectively;

[0010] The first channel and the second channel are arranged in a one-to-one correspondence.

[0011] 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.

[0012] In some embodiments, the docking angle of the second photovoltaic tracking bracket is consistent with the docking angle of the first photovoltaic tracking bracket.

[0013] In some embodiments, the docking angle of the second photovoltaic tracking bracket is smaller than the docking angle of the first photovoltaic tracking bracket.

[0014] In some embodiments, the parking angle of the first photovoltaic tracking bracket is less than 20 degrees;

[0015] The docking angle of the second photovoltaic tracking bracket is less than 20 degrees.

[0016] In some embodiments, the driving points of the second photovoltaic tracking bracket are arranged alternately with the driving points of the first photovoltaic tracking bracket.

[0017] In some embodiments, the driving points of the first photovoltaic tracking bracket are evenly arranged on the first photovoltaic tracking bracket;

[0018] The driving point of the second photovoltaic tracking bracket is located in the middle of the second photovoltaic tracking bracket.

[0019] In some embodiments, the peripheral area is located on a side of the inner area facing the wind direction or is relatively arranged on two sides of the inner area along the wind direction; or the peripheral area is located around the inner area.

[0020] In some embodiments, a plurality of photovoltaic components are further included, and the plurality of photovoltaic components are respectively disposed on the first photovoltaic tracking bracket and the second photovoltaic tracking bracket.

[0021] The technical effect of the present application is that the photovoltaic tracking brackets in the outer area adopt multi-point drive. When affected by strong winds, multiple driving points form multiple locking points, which improves the structural stability and wind resistance of the photovoltaic tracking brackets in the outer area, thereby being used to resist and attenuate wind force and act as a windbreak wall to reduce the wind force of 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, thereby improving the stability and reliability of the entire system. In addition, the proportion of photovoltaic tracking brackets in the inner area in the entire system is high, which can reduce the system cost and make the total cost more competitive. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present application is further described in detail below with reference to the accompanying drawings and specific implementation methods:

[0023] Figure 1 It is a distribution diagram of a photovoltaic tracking system provided by an embodiment of the present application;

[0024] Figure 2is a distribution diagram of a photovoltaic tracking system provided by another embodiment of the present application;

[0025] Figure 3 It is a side view of a photovoltaic module installed on a photovoltaic tracking bracket provided in an embodiment of the present application.

[0026] Description of Figure Numbers:

[0027] 100, photovoltaic tracking bracket array; 110, peripheral area; 111, first photovoltaic tracking bracket; 120, inner area; 121, second photovoltaic tracking bracket; 130, driving point; 140, first channel; 150, second channel;

[0028] 200. Photovoltaic panels. DETAILED DESCRIPTION

[0029] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0030] In order to more clearly illustrate the application embodiments or technical solutions in the prior art, the specific implementation methods of the present application will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0031] In order to simplify the drawings, only the parts related to the present application are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0032] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0033] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] In the embodiments shown in the drawings, directional indications (such as up, down, left, right, front, and back, etc.) are not absolute but relative when describing the structure and movement of each component, and are not used to limit the direction of the product in actual use.

[0035] In addition, in the description of the present application, ordinal numbers, such as "first", "second", etc., are only used to distinguish and describe related objects, and cannot be understood as indicating or implying the relative importance or order between the related objects.

[0036] According to the specific embodiments provided in this application, Figure 1 As shown, a photovoltaic tracking system includes a photovoltaic tracking bracket array 100, and the photovoltaic tracking bracket array 100 includes a first photovoltaic tracking bracket 111 located in a peripheral area 110 and a second photovoltaic tracking bracket 121 located in an inner area 120; the first photovoltaic tracking bracket 111 adopts multi-point drive, and the second photovoltaic tracking bracket 121 adopts single-point drive.

[0037] Specifically, the photovoltaic tracking bracket array 100 refers to a plurality of photovoltaic tracking brackets arranged in an array, and the photovoltaic tracking bracket array 100 includes a plurality of photovoltaic tracking brackets, and the plurality of photovoltaic tracking brackets are arranged in multiple rows and columns. The photovoltaic tracking bracket array 100 includes a plurality of first photovoltaic tracking brackets 111 located in a peripheral area 110 and a plurality of second photovoltaic tracking brackets 121 located in an inner area 120; wherein, the peripheral area 110 and the inner area 120 of the photovoltaic tracking bracket array 100 can be divided according to the degree to which the photovoltaic tracking brackets are affected by wind in extreme weather, for example, the area where the photovoltaic tracking brackets are subject to a larger wind load is located is divided into the peripheral area 110, and the area where the photovoltaic tracking brackets are subject to a smaller wind load is located is divided into the inner area 120, and the inner area 120 is located inside the peripheral area 110. The specific division method of the inner and outer areas of the photovoltaic tracking bracket array 100 can refer to the division method in the prior art. For example, you can refer to the prior application "202011600085.9". Of course, you can also refer to other division methods in the prior art. This application does not limit the specific division method of the inner and outer areas of the photovoltaic tracking bracket array 100, as long as the appropriate inner and outer areas can be divided according to factors such as the terrain and climate of the project location.

[0038] In some embodiments, Figure 1 As shown, the outer area 110 is located on the side of the inner area 120 facing the wind direction or is relatively arranged on both sides of the inner area 120 along the wind direction; or, as shown Figure 2 As shown, the peripheral area 110 is located around the inner area 120. The peripheral area 110 is located at the edge of the photovoltaic tracking bracket array 100. According to the perennial wind direction of the project site, the first photovoltaic tracking bracket 111 with multi-point drive can be set on one or more sides of the photovoltaic tracking bracket that are exposed to wind all year round, or the first photovoltaic tracking bracket 111 with multi-point drive can be set on all four edges of the photovoltaic tracking bracket array 100. Considering the factors of tailwind and headwind, when the location of the photovoltaic tracking bracket array 100 is exposed to wind from a single wind direction all year round, the peripheral area 110 is located on the side of the inner area 120 facing the wind direction, or the peripheral area 110 is symmetrically arranged outside the inner area 120 along the wind direction; when the location of the photovoltaic tracking bracket array 100 is exposed to wind from multiple wind directions all year round, the peripheral area 110 is arranged along the four sides of the inner area 120. That is, the peripheral area 110 can be arranged on one or more sides of the inner area 120 in the circumferential direction.

[0039] The first photovoltaic tracking bracket 111 in the peripheral area 110 is located at the 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 at the inner periphery of the photovoltaic tracking bracket array 100 and is less affected by the wind. The first photovoltaic tracking bracket 111 in the peripheral area 110 is driven in the form of multi-point drive, and the second photovoltaic tracking bracket 121 in the inner area 120 is driven in the form of single-point drive. Multi-point drive means that there are multiple driving points 130 to drive the main beam of the photovoltaic tracking bracket to rotate. The multiple driving points 130 are arranged at intervals along the axial direction of the main beam. In one embodiment, the specific driving method of the multi-point drive is that an active driving mechanism is provided at one of the driving points, and a driven driving mechanism is provided at the other driving points. A synchronous shaft for connecting the active driving mechanism and the driven driving mechanism is provided between the active driving mechanism and the driven driving mechanism. The active driving mechanism includes a driving motor and a worm gear transmission mechanism. The output end of the driving motor is connected to the input end of the worm gear transmission mechanism. The worm gear transmission mechanism is driven by the driving motor to transmit. The worm gear transmission mechanism includes multiple groups of worm gears, thereby forming a first power output end and a second power output end. The first power output end is connected to the main beam of the first photovoltaic tracking bracket 111, thereby driving the main beam of the first photovoltaic tracking bracket 111 to rotate; the second power output end The force output end is connected to one end of the synchronous shaft by transmission, and the power is transmitted to the driven drive mechanism through the synchronous shaft; the driven drive mechanism has the same structure as the active drive mechanism, and the difference between the two is that the driven drive mechanism does not have a drive motor, and the synchronous shaft is connected to the input end of the driven drive mechanism by transmission, so as to transmit the power to the driven drive mechanism, and the first power output end of the driven drive mechanism is connected to the main beam of the first photovoltaic tracking bracket 111, and the second power output end of the driven drive mechanism is connected to the synchronous shaft of the next section by transmission, so as to realize the synchronous drive of the first photovoltaic tracking bracket 111 at multiple driving points 130; specifically, the active drive mechanism and the driven drive mechanism use multiple sets of worm gears to realize the specific structure of multi-point parallel drive, which can refer to the prior applications such as "201911013335.6", "201911406319.3" and "202120139075.3". By setting a drive motor, and then transmitting the power of the drive motor to multiple driven drive points through the synchronous shaft, a multi-point drive is formed, and only one drive motor is set, which can greatly reduce the cost. Single-point drive means that there is only one drive point 130 on the main beam of the photovoltaic tracking bracket. A drive motor and a worm gear transmission mechanism are set at the drive point 130 to drive the main beam to rotate. In the single-point drive mode, the worm gear transmission mechanism only has one power output end connected to the main beam.

[0040] It is understandable that, in addition to the worm gear transmission mechanism, the transmission mechanism may also adopt transmission modes such as gear transmission, electric push rod transmission, etc. Gear transmission and electric push rod transmission mechanisms are existing technologies and will not be described in detail here.

[0041] The first photovoltaic tracking bracket 111 adopts multi-point drive. When affected by strong winds, multiple driving points 130 form multiple fixed locking points, which greatly reduces the shaking of the photovoltaic tracking bracket, improves the structural stability and wind resistance of the first photovoltaic tracking bracket 111, and can disperse wind pressure and wind torque, so that the first photovoltaic tracking bracket 111 in the outer area 110 can be used to resist and attenuate wind force, act as a windbreak, reduce the wind force on the second photovoltaic tracking bracket 121 in the inner area, and make the wind pressure on the second photovoltaic tracking bracket 121 small, so that the second photovoltaic tracking bracket 121 in the inner area 120 can also be guaranteed. Since the number of second photovoltaic tracking brackets 121 in the inner area 120 accounts for a higher proportion, the total cost of the entire photovoltaic tracking system is lower and more competitive. It should be noted that when the photovoltaic tracking bracket array 100 also includes a deep inner area, the photovoltaic tracking brackets in the deep inner area also adopt a single-point drive form, and the deep inner area is located inside the inner area 120.

[0042] In this embodiment, the first photovoltaic tracking bracket 111 includes more than two driving points 130, for example, two, three or more driving points 130. The specific number of driving points 130 of the first photovoltaic tracking bracket 111 can be set according to the actual situation of the project. Figure 1 This is only an example of the number of driving points 130 of the first photovoltaic tracking bracket 111, and is not a specific limitation on the number of driving points 130. The number of rows of the first photovoltaic tracking bracket 111 on the same side can also be one row or more rows, and the specific number of rows can be set according to the actual situation of the project. Figure 1 This is only an example of the number of rows of the first photovoltaic tracking brackets 111 and is not a specific limitation on the number of rows of the first photovoltaic tracking brackets 111 .

[0043] Furthermore, each first photovoltaic tracking bracket 111 is mounted with a photovoltaic component to form a first photovoltaic tracking system, and each second photovoltaic tracking bracket 121 is mounted with a photovoltaic component to form a second photovoltaic tracking system.

[0044] In some embodiments, 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 second photovoltaic tracking brackets 121 and between the first photovoltaic tracking bracket 111 and the adjacent second photovoltaic tracking bracket 121; the first channel 140 and the second channel 150 are arranged in a one-to-one correspondence. The plurality of first photovoltaic tracking brackets 111 in the peripheral area 110 are arranged in a plurality of rows, and along the length direction of the first photovoltaic tracking bracket 111, the spacing between adjacent first photovoltaic tracking brackets 111 and the first photovoltaic tracking bracket 111 forms the first channel 140; the plurality of second photovoltaic tracking brackets 121 in the inner area 120 are also arranged in a plurality of rows, and the spacing between adjacent second photovoltaic tracking brackets 121 and the first photovoltaic tracking bracket 111 forms the second channel 150. The first channel 140 and the second channel 150 are arranged in a corresponding manner to form an artificial channel, which is convenient for the subsequent inspection of the first photovoltaic tracking bracket 111 and The second photovoltaic tracking bracket 121 is maintained; in addition, when the first channel 140 and the second channel 150 are set in a one-to-one correspondence, that is, each column of the first photovoltaic tracking bracket 111 in the outer area 110 and each column of the second photovoltaic tracking bracket 121 in the inner area 120 are set in correspondence, so that the first photovoltaic tracking bracket 111 located in the outer area 110 can block the second photovoltaic tracking bracket 121 located in the inner area 120, so as to reduce the wind force received by the second photovoltaic tracking bracket 121 in the inner area 120, and avoid strong wind blowing from the first channel 140 to the second photovoltaic tracking bracket 121.

[0045] In some embodiments, the projection of the second photovoltaic tracking bracket 121 in the windward direction is located within the projection range of the first photovoltaic tracking bracket 111 in the windward direction, that is, in the main beam length direction 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, so that the first photovoltaic tracking bracket 111 located in the outer area 110 can serve as a wind shield for the second photovoltaic tracking bracket 121 in the inner area 120, thereby preventing the edge area of ​​the second photovoltaic tracking bracket 121 in the inner area 120 from being blocked by the first photovoltaic tracking bracket 111, causing the second photovoltaic tracking bracket 121 to be damaged by the wind, thereby improving the stability of the entire photovoltaic tracking system.

[0046] When photovoltaic modules are installed on the main beam of the photovoltaic tracking bracket, the photovoltaic modules are installed on the first photovoltaic tracking bracket 111 to form a first photovoltaic tracking system, and the photovoltaic modules are installed on the second photovoltaic tracking bracket 121 to form a second photovoltaic tracking system. When the overall length of the photovoltaic modules installed on the main beam is greater than the length of the main beam, it is necessary to ensure that the projection of the second photovoltaic tracking system in the windward direction is completely located at the projection of the first photovoltaic tracking system in the windward direction, that is, it is necessary to ensure that the overall length of the second photovoltaic tracking system is also less than or equal to the overall length of the first photovoltaic tracking system.

[0047] In some embodiments, the docking angle of the second photovoltaic tracking bracket 121 is consistent with the docking angle of the first photovoltaic tracking bracket 111 . Figure 3 The schematic diagram is when the docking angle of the photovoltaic module 200 is 15 degrees. The docking angle refers to when the photovoltaic tracking bracket encounters strong winds, it is necessary to drive the main beam to rotate so as to rotate the photovoltaic module 200 installed on the main beam of the photovoltaic tracking bracket to a specific angle to reduce the damage of the photovoltaic tracking bracket and the photovoltaic module 200 caused by strong winds. This specific angle is the strong wind protection angle, also called the docking angle, which is the angle between the photovoltaic module 200 and the horizontal plane. In the strong wind protection state, the photovoltaic module 200 remains at this docking angle until the strong wind protection state is released. When it is not in the strong wind protection state, at night when the photovoltaic tracking bracket is not working, the angle of the photovoltaic module 200 can also be adjusted to the docking angle. The docking angle can be 0 degrees or other angles such as 10 degrees, 15 degrees, 20 degrees, etc. In this embodiment, the docking angle is 15 degrees.

[0048] The docking angle of the second photovoltaic tracking bracket 121 is consistent with the docking angle of the first photovoltaic tracking bracket 111, so that the first photovoltaic tracking bracket 111 in the outer area 110 has a shielding 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 with the solution in which the second photovoltaic tracking bracket 121 and the first photovoltaic tracking bracket 111 have different docking angles, for example, when the number of rows of the second photovoltaic tracking bracket 121 is large, the docking angle of the first photovoltaic tracking bracket 111 located in the outer area 110 is large, and the docking angle of the second photovoltaic tracking bracket 121 located in the inner area 120 is small, then the outer area 110 will shield the first few rows of the second photovoltaic tracking bracket 121 in the inner area 120, but at the same time, 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 the Bernoulli principle (the pressure is low where the flow rate is high), the speed of this part of the airflow will increase and the pressure will become relatively small; while near the ground below the first photovoltaic tracking bracket 111, the airflow is relatively slow due to the influence of ground friction, etc., and the pressure is relatively large. This pressure difference between the upper and lower parts will cause the air to flow from the lower part with high pressure to the upper part with low pressure, forming a downwash airflow, which will cause the wind to sink within a certain distance behind the first photovoltaic tracking bracket 111. Therefore, starting from several rows in the middle, the second photovoltaic tracking bracket 121 may be greatly affected by the wind and become unstable.

[0049] Therefore, when the number of rows of the second photovoltaic tracking brackets 121 in the inner area 120 is small, the docking angle of the second photovoltaic tracking brackets 121 can be smaller than the docking 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.

[0050] Preferably, the docking angle of the first photovoltaic tracking bracket 111 is less than 20 degrees, and the docking angle of the second photovoltaic tracking bracket 121 is less than 20 degrees. For example, the docking angles of the first photovoltaic tracking bracket 111 and the second photovoltaic tracking bracket 121 can be 0 degrees, 5 degrees, 10 degrees, 15 degrees, etc.; when the docking angle is 0 degrees, the photovoltaic assembly 200 is in a flat state; when the docking angle is 5 degrees, the angle between the photovoltaic assembly 200 and the horizontal plane is 5 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 situation, and this embodiment does not specifically limit it. In this embodiment, when the first photovoltaic tracking bracket 111 and the second photovoltaic tracking bracket 121 are docked at a small angle, the wind pressure of the photovoltaic assembly 200 is small, the risk of hidden cracks of the photovoltaic assembly 200 is reduced, and the pile foundation is subjected to small force, the second photovoltaic tracking bracket 121 in the inner area 120 and the first photovoltaic tracking bracket 111 in the outer area 110 are more stable, and the pile foundation cost is reduced.

[0051] In some embodiments, the driving points of the second photovoltaic tracking bracket 121 are arranged alternately with the driving points of the first photovoltaic tracking bracket 111. The driving point on the second photovoltaic tracking bracket 121 may be located in the middle of the second photovoltaic tracking bracket 121 to improve the force uniformity of the second photovoltaic tracking bracket 121. The driving points of the first photovoltaic tracking bracket 111 are evenly arranged on the first photovoltaic tracking bracket 111. Exemplarily, when there are two driving points 130 on the first photovoltaic tracking bracket 111, the two driving points 130 are symmetrically arranged relative to the middle of the first photovoltaic tracking bracket 111, and the driving point on the second photovoltaic tracking bracket 121 is located between the two driving points 130 of the first photovoltaic tracking bracket 111; when there are three driving points 130 on the first photovoltaic tracking bracket 111, the three driving points 130 are evenly arranged on the first photovoltaic tracking bracket 111 to improve the force uniformity of the first photovoltaic tracking bracket 111.

[0052] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0053] It should be noted that the above embodiments can be freely combined as needed. The above is only the preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present application, and these improvements and modifications should also be regarded as the protection scope of the present application.

Claims

1. A photovoltaic tracking system, characterized in that: include: A photovoltaic tracking bracket array, wherein the photovoltaic tracking bracket array includes a first photovoltaic tracking bracket located in a peripheral area and a second photovoltaic tracking bracket located in an inner area; The first photovoltaic tracking bracket adopts multi-point drive, and the second photovoltaic tracking bracket adopts single-point drive.

2. A photovoltaic tracking system according to claim 1, characterized in that: Along the length direction of the first photovoltaic tracking brackets, a first channel is formed between adjacent first photovoltaic tracking brackets; Along the length direction of the first photovoltaic tracking bracket, second channels are formed between adjacent second photovoltaic tracking brackets and between the first photovoltaic tracking bracket and the adjacent second photovoltaic tracking bracket respectively; The first channel and the second channel are arranged in a one-to-one correspondence.

3. A photovoltaic tracking system according to claim 2, 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.

4. A photovoltaic tracking system according to claim 1, characterized in that: The docking angle of the second photovoltaic tracking bracket is consistent with the docking angle of the first photovoltaic tracking bracket.

5. A photovoltaic tracking system according to claim 1, characterized in that: The docking angle of the second photovoltaic tracking bracket is smaller than the docking angle of the first photovoltaic tracking bracket.

6. A photovoltaic tracking system according to claim 4 or 5, characterized in that: The docking angle of the first photovoltaic tracking bracket is less than 20 degrees; The docking angle of the second photovoltaic tracking bracket is less than 20 degrees.

7. A photovoltaic tracking system according to any one of claims 1 to 5, characterized in that: The driving points of the second photovoltaic tracking bracket are arranged alternately with the driving points of the first photovoltaic tracking bracket.

8. A photovoltaic tracking system according to claim 7, characterized in that: The driving points of the first photovoltaic tracking bracket are evenly arranged on the first photovoltaic tracking bracket; The driving point of the second photovoltaic tracking bracket is located in the middle of the second photovoltaic tracking bracket.

9. A photovoltaic tracking system according to any one of claims 1 to 5, characterized in that: The outer area is located on a side of the inner area facing the wind direction or is relatively arranged on two sides of the inner area along the wind direction; or the outer area is located around the inner area.

10. A photovoltaic tracking system according to any one of claims 1 to 5, characterized in that: It also includes a plurality of photovoltaic components, which are respectively arranged on the first photovoltaic tracking bracket and the second photovoltaic tracking bracket.

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