Controllable flexible photovoltaic support and control method

Abstract

The invention discloses a controllable flexible photovoltaic support and a control method, the controllable flexible photovoltaic support comprises a support main body, a rigid rope traction mechanism and a base, the support main body is connected with the base through the rigid rope traction mechanism, and the front side of the support main body is provided with a photovoltaic panel; a first airflow channel and a second airflow channel are arranged on the support body, a second air outlet of the first airflow channel and a first air outlet of the second airflow channel are connected with hollow connecting rods, guide holes in sliding fit with the hollow connecting rods are formed in the base, and the hollow connecting rods are connected with the elastic air bag. The method further comprises the steps of S1 to S4 and the like. The photovoltaic support can be adaptively adjusted according to wind power, the resistance and adaptability to the working environment of photovoltaic power generation, especially severe weather such as strong wind, are enhanced, meanwhile, overlimit strong wind protection measures are taken on the photovoltaic support based on the control method, and a flexible photovoltaic support innovative design scheme is provided for the new energy photovoltaic field.

Description

Technical Field

[0001] The present invention relates to the field of offshore photovoltaic technology, and in particular to a controllable flexible photovoltaic bracket and a control method. Background Art

[0002] In the field of new energy, photovoltaic power generation plays an increasingly important role. At the same time, with the continuous advancement of related photovoltaic module production technology, its production cost is gradually decreasing, and the application scope and scenarios of photovoltaic power generation are becoming wider. However, in actual application, the photovoltaic power generation industry is also facing some challenges.

[0003] Traditional rigid photovoltaic brackets occupy a large amount of land resources and destroy vegetation, which easily leads to waste of arable land resources and excessive use of steel, which is contrary to the concept of green environmental protection. Under the premise of not affecting the function of photovoltaic brackets, in order to simplify the structure of photovoltaic brackets, the photovoltaic power generation industry generally conducts research and design of flexible photovoltaic brackets. my country's photovoltaic power generation is mainly concentrated in the central and western regions, and the working environment is mainly in mountainous areas, plateaus, offshore areas with sufficient sunshine time. However, these areas often experience strong convective weather such as strong winds. Therefore, in the design and production of flexible photovoltaic brackets, it is necessary to enhance their wind resistance and fully protect the photovoltaic panels to ensure the normal operation of photovoltaic power generation.

[0004] Existing flexible photovoltaic brackets are generally cable-supported photovoltaic brackets, which use a cable structure to support multiple photovoltaic panels in series, reduce the weight of the overall system, improve power generation efficiency and light utilization, and simplify the structure to enhance flexibility. However, there are still some problems as follows: 1. The existing cable structure has limited wind resistance. In strong winds, it will vibrate or even overturn and deform, which seriously affects the reliability and stability of photovoltaic power generation. 2. Ignoring or weakening the role of the control system and the control algorithm of the auxiliary protection flexible photovoltaic bracket in the photovoltaic power generation process; 3. The structural design of the photovoltaic bracket is relatively limited and has a single function, which cannot guarantee the working position accuracy of each photovoltaic panel during photovoltaic power generation; 4. There is a lack of overall control methods for the working process of flexible photovoltaic brackets, and it is impossible to ensure real-time monitoring of the working status of each photovoltaic bracket. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the present invention provides a controllable flexible photovoltaic bracket and a control method thereof. The photovoltaic bracket can be adaptively adjusted according to the wind force, thereby enhancing the resistance and adaptability to severe weather such as strong winds in the working environment of photovoltaic power generation, and at the same time, the photovoltaic bracket is protected from excessive strong winds based on the control method.

[0006] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is: A controllable flexible photovoltaic bracket is provided, comprising a bracket body, a rigid rope traction mechanism and a base, wherein the bracket body is connected to the base through the rigid rope traction mechanism, and a photovoltaic panel is arranged on the front side of the bracket body; a first air flow channel and a second air flow channel are arranged on the bracket body, and the second air outlet of the first air flow channel and the first air outlet of the second air flow channel are both connected to a hollow connecting rod, and a guide hole slidably matched with the hollow connecting rod is arranged on the base, and the guide hole is connected to an airbag cavity, and an elastic airbag is arranged in the airbag cavity, and one end of the elastic airbag is sealed and connected to the hollow connecting rod.

[0007] Furthermore, the rigid rope traction mechanism includes two rigid ropes, a traction bracket and a controller. One end of the rigid rope is fixedly connected to the bracket body, and the other end is connected to the traction bracket. The traction bracket is provided with a cylindrical mounting cavity that cooperates with the rigid rope. A plurality of electromagnets are provided in the cylindrical mounting cavity. The electromagnets are electrically connected to the controller. The electromagnets are used to adsorb and fix the rigid ropes, and the controller is used to control the electromagnets.

[0008] Further, the electromagnet comprises a first electromagnet, a second electromagnet and a third electromagnet, and the first electromagnet, the second electromagnet and the third electromagnet are sequentially arranged at the inlet end of the cylindrical mounting cavity.

[0009] Furthermore, the adsorption end of the rigid rope is provided with an iron ring cooperating with the electromagnet.

[0010] Furthermore, a pressure sensor is arranged at the middle of each rigid rope.

[0011] Furthermore, the first airflow channel is cross-connected with the middle portion of the second airflow channel.

[0012] Furthermore, the elastic airbag is in the shape of a bellows, one end of the elastic airbag is closed, and the other end is provided with a connecting hole that cooperates with the hollow connecting rod.

[0013] Furthermore, a plurality of mounting rods are arranged at the bottom of the bracket body.

[0014] Furthermore, the first air inlet of the first air flow channel and the second air inlet of the second air flow channel are both arranged on the upper back side of the bracket body.

[0015] A control method for a controllable flexible photovoltaic support comprises the following steps: S1. After the flexible photovoltaic bracket starts working, the pressure sensor detects the tension data of the rigid rope and sends the real-time tension data to the controller; S2. Calculate the distance difference through the over-limit wind protection model δ ; Specifically, the over-limit wind protection model is as follows: ; in, xis the elastic deformation of the rigid rope, F The tension on the rigid rope is measured by the pressure sensor. k is the Hooke coefficient of the rigid rope; a It is the distance from the intersection of the rear side of the base and the traction bracket in the vertical direction to the top installation point of the connecting rod. b is the effective working length of the connecting rod, d is the working length of the bracket body, L is the distance between the rigid rope connection point and the intersection of the straight line where the hollow connecting rod axis lies and the rigid rope axis; The distance from the intersection of the support body and the hollow connecting rod axis to the intersection of the hollow connecting rod axis and the rigid rope axis in normal state, s It is the distance from the intersection point of the support body and the axis of the hollow connecting rod to the intersection point of the axis of the hollow connecting rod and the axis of the rigid rope during operation; S3, set the starting difference of the first level protection state to δ 1. The starting difference of the secondary protection state is δ 2. The starting difference of the third level protection state is δ 3. Determine the working difference range of the electromagnet under several levels of protection, where ; S4, the controller calculates the distance difference obtained in step S2 δ Compare with the working difference range corresponding to the set electromagnet to obtain the working conditions and working quantities of several electromagnets; specifically: When the distance difference When the controller does not issue any command, the flexible photovoltaic bracket body is automatically adjusted through the rigid rope and elastic airbag; When the distance difference When the controller issues a command to control one of the first electromagnet, the second electromagnet and the third electromagnet to be powered on and enter the first level protection state; When the distance difference When the controller issues a command to control any two of the first electromagnet, the second electromagnet and the third electromagnet to be powered on and enter the secondary protection state; When the distance difference When the controller sends out a command to control the first electromagnet, the second electromagnet and the third electromagnet to be energized and work, entering the third-level protection state. At the same time, the controller sends out an alarm signal, and the staff takes further follow-up protection work.

[0016] The beneficial effects of the present invention are: The bracket body of the present invention is provided with an air inlet and an airflow channel, and cooperates with the hollow connecting rod and the elastic airbag, so that the bracket body can inflate the elastic airbag through the hollow connecting rod, so that the bracket body can adaptively adjust its movement according to the wind force, which can effectively enhance the wind resistance of the flexible photovoltaic bracket; further, the airflow channel and the elastic airbag are designed to be a cross-connection structure, which can effectively ensure the flexible buffering effect and position return effect of the photovoltaic bracket.

[0017] The controllable flexible photovoltaic bracket of the present invention cooperates with the over-limit wind multi-level protection control method, which can improve the overall effective control of the working process of the flexible photovoltaic bracket, ensure the real-time monitoring of the working status of the flexible photovoltaic bracket, and effectively improve the wind adaptability of the photovoltaic bracket.

[0018] The rigid rope traction mechanism of the present invention is provided with a pressure sensor and a multi-stage electromagnet structure, so that the flexible photovoltaic bracket is stable and reliable during the photovoltaic power generation process; at the same time, compared with the traditional pure mechanical structure, it can better ensure the reliability and stability of the working position of the flexible photovoltaic bracket body.

[0019] The back of the support body of the present invention is provided with mutually unconnected cross-type airflow channels, and the ends are connected with elastic airbags, which can not only make full use of the environmental wind force, but also make it have stronger buffering capacity and flexibility in the working process compared with the traditional suspension cable structure.

[0020] The flexible photovoltaic bracket of the present invention solves the problem of strong wind causing the working position of the bracket body to shift, and cooperates with the multi-level control algorithm of excessive wind force to effectively ensure its safety and stability during operation, and significantly improves the flexible adaptability of the flexible photovoltaic bracket to environmental changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The overall structure of the controllable flexible photovoltaic support of the present invention is shown in FIG. Figure 1 ; Figure 2 The overall structure of the controllable flexible photovoltaic support of the present invention is shown in FIG. Figure 2 ; Figure 3 It is a partial structural schematic diagram of the controllable flexible photovoltaic support of the present invention; Figure 4 It is a structural schematic diagram of a rigid rope traction mechanism; Figure 5 is a rear view of the bracket body; Figure 6 It is a schematic diagram of the structure of the hollow connecting rod and the elastic airbag; Figure 7 This is a schematic diagram of the controllable flexible photovoltaic support of the present invention; Figure 8 It is a flow chart of the control method part of the present invention; The main components in the figure are described as follows: 1. bracket body; 11. first air inlet; 12. second air inlet; 13. first air outlet; 14. second air outlet; 15. first air flow channel; 16. second air flow channel; 2. Rigid rope traction mechanism; 21. Rigid rope; 22. Traction bracket; 23. Electromagnet; 231. First electromagnet; 232. Second electromagnet; 233. Third electromagnet; 24. Connecting rod; 3. Base; 4. Photovoltaic panel; 5. Hollow connecting rod; 6. Elastic airbag; 7. Mounting rod. DETAILED DESCRIPTION

[0022] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0023] like Figure 1 , 2 As shown in Figure 3, the controllable flexible photovoltaic bracket includes a bracket body 1, a rigid rope traction mechanism 2 and a base 3. The bracket body 1 is connected to the base 3 through the rigid rope traction mechanism 2, and a photovoltaic panel 4 is arranged on the front side of the bracket body 1. A plurality of mounting rods 7 are fixed to the bottom of the bracket body 1 to facilitate the installation and fixation of the flexible photovoltaic bracket. The bracket body 1 is provided with a first airflow channel 15 and a second airflow channel 16, and the second air outlet 14 of the first airflow channel 15 and the first air outlet 13 of the second airflow channel 16 are both connected to a hollow connecting rod 5. The base 3 is provided with a guide hole that is slidably matched with the hollow connecting rod 5, and the guide hole is connected to an airbag cavity, and an elastic airbag 6 is arranged in the airbag cavity, and one end of the elastic airbag 6 is sealed and connected to the hollow connecting rod 5.

[0024] like Figure 2 As shown, the rigid rope traction mechanism 2 includes two rigid ropes 21, a traction bracket 22 and a controller. One end of the rigid rope 21 is fixedly connected to the bracket body 1, and the other end is connected to the traction bracket 22. The traction bracket 22 is provided with a columnar installation cavity matched with the rigid rope 21. A plurality of electromagnets 23 are provided in the columnar installation cavity. The electromagnets 23 are electrically connected to the controller. The electromagnets 23 are used to absorb and fix the rigid ropes 21, and the controller is used to control the electromagnets 23. A pressure sensor is provided in the middle of each rigid rope 21. The pressure sensor is used to measure the tension data of the rigid rope 21 in real time, so as to cooperate with the controller to control the plurality of electromagnets 23, so as to use the rigid ropes 21 to realize multi-level protection of the flexible photovoltaic bracket.

[0025] like Figure 4 As shown, the electromagnet 23 includes a first electromagnet 231, a second electromagnet 232 and a third electromagnet 233, which are sequentially arranged at the inlet end of the cylindrical mounting cavity. The electromagnet 23 is preferably an electromagnetic coil. For further improvement, the adsorption end of the rigid rope 21 is provided with an iron ring that cooperates with the electromagnet 23, and the iron ring is fixed to the outside of the rigid rope 21, and the outside of the iron ring has a clearance or interference fit with the inner diameter of the electromagnet 23.

[0026] like Figure 5 As shown, the first airflow channel 15 is cross-connected with the middle of the second airflow channel 16, so that the air in the first airflow channel 15 and the second airflow channel 16 can be discharged and discharged evenly and synchronously, thereby effectively ensuring the flexible buffering effect and position return effect of the photovoltaic bracket. The first air inlet 11 is set at the upper left corner of the back of the bracket body 1, the second air inlet 12 is set at the upper right corner of the back of the bracket body 1, the first air outlet 13 is set at the lower left corner of the back of the bracket body 1, and the second air outlet 14 is set at the lower right corner of the back of the bracket body 1.

[0027] like Figure 4 and 6 As shown, the elastic airbag 6 is in the shape of a corrugated tube, one end of the elastic airbag 6 is closed, and the other end is provided with a connection hole that cooperates with the hollow connecting rod 5. The specific cooperation principle of the hollow connecting rod 5 and the elastic airbag 6 is as follows: the hollow connecting rod 5 of the bracket body 1 is connected with the elastic airbag 6, the hollow connecting rod 5 is hollow, and the elastic airbag 6 is fixed in the cylindrical cavity of the base 3. When a normal light wind blows toward the back of the bracket body 1, the air enters the two elastic airbags 6 from the first air inlet 11 and the second air inlet 12 through the first air flow channel 15 and the second air flow channel 16 respectively, and the bracket body 1 is affected by the wind, resulting in a change in the normal working position. The hollow connecting rod 5 moves with the body 1 and squeezes the elastic airbag 6 in the base 3, and the inflated elastic airbag 6 can be used as a buffer to resist the squeezing of the hollow connecting rod 5. After the wind subsides, the air in the elastic airbag 6 is discharged in the reverse direction along the air flow channel, and the bracket body 1 is also restored to the normal working position under the combined action of the elastic airbag 6 and the rigid rope traction mechanism 2.

[0028] Since the working position of the support body 1 may be shifted due to the influence of wind force, which may affect the photovoltaic power generation, and the elastic airbag 6 can only cope with ordinary slight wind force, a control method of a controllable flexible photovoltaic support is proposed to provide multi-level protection for the support body 1 under excessive wind force, which specifically includes the following steps: S1. After the flexible photovoltaic bracket starts working, the pressure sensor detects the tension data of the rigid rope and sends the real-time tension data to the controller; S2. Calculate the distance difference through the over-limit wind protection model δ; The specific over-limit wind protection model is as follows:

[0029] In the formula, x is the elastic deformation of the rigid rope, F The tension on the rigid rope is measured by the pressure sensor. k is the Hooke coefficient of the rigid rope; a It is the distance from the intersection of the rear side of the base and the traction bracket in the vertical direction to the top installation point of the connecting rod. b is the effective working length of the connecting rod (i.e. the axial length of the mounting rod), d is the working length of the support body (i.e. the distance between the rigid rope connection point and the intersection of the support body and the hollow connecting rod axis), L The length of the distance between the rigid rope connection point and the intersection of the straight line where the hollow connecting rod axis is located and the rigid rope axis; The distance from the intersection of the support body and the hollow connecting rod axis to the intersection of the hollow connecting rod axis and the rigid rope axis in normal state, s It is the distance from the intersection of the support body and the hollow connecting rod axis to the intersection of the hollow connecting rod axis and the rigid rope axis during operation; Figure 7 The schematic diagram of the controllable flexible photovoltaic support shown; S3, set the starting difference of the first level protection state to δ 1. The starting difference of the secondary protection state is δ 2. The starting difference of the third level protection state is δ 3. Determine the working difference range of the electromagnet under several levels of protection, where ; S4, the controller calculates the distance difference obtained in step S2 δ Compare with the working difference range corresponding to the set electromagnet to obtain the working conditions and working quantities of several electromagnets; specifically: When the distance difference When the photovoltaic bracket is in the state of automatic adjustment and returning to the normal position, the controller does not issue any instructions, and the main body of the flexible photovoltaic bracket is automatically adjusted through the rigid rope and elastic airbag; When the distance difference When the rope frame structure and the elastic airbag alone cannot resist the influence of wind, in order to ensure that the working position of the flexible photovoltaic bracket body does not deviate further, the controller issues a command to control one of the first electromagnet 231, the second electromagnet 232 and the third electromagnet 233 to be powered on and enter the first level protection state; When the distance difference Similarly, to ensure that the main body does not deviate excessively, the controller issues a command to control any two of the first electromagnet 231, the second electromagnet 232 and the third electromagnet 233 to be powered on and enter the secondary protection state; When the distance difference When the wind is too strong, the controller sends an alarm signal to the photovoltaic power generation base, notifying the corresponding staff to take further follow-up protection measures.

Claims

1. A controllable flexible photovoltaic support, characterized in that: It comprises a support body (1), a rigid rope traction mechanism (2) and a base (3), wherein the support body (1) and the base (3) are connected via the rigid rope traction mechanism (2), and a photovoltaic panel (4) is arranged on the front side of the support body (1); The support body (1) is provided with a first air flow channel (15) and a second air flow channel (16); the second air outlet (14) of the first air flow channel (15) and the first air outlet (13) of the second air flow channel (16) are both connected to a hollow connecting rod (5); the base (3) is provided with a guide hole slidably matched with the hollow connecting rod (5); the guide hole is connected to an airbag cavity; an elastic airbag (6) is provided in the airbag cavity; one end of the elastic airbag (6) is sealed and connected to the hollow connecting rod (5).

2. The controllable flexible photovoltaic support according to claim 1, characterized in that: The rigid rope traction mechanism (2) comprises two rigid ropes (21), a traction bracket (22) and a controller; one end of the rigid rope (21) is fixedly connected to the bracket body (1), and the other end is connected to the traction bracket (22); a columnar mounting cavity cooperating with the rigid rope (21) is provided on the traction bracket (22); a plurality of electromagnets (23) are provided in the columnar mounting cavity; the electromagnets (23) are electrically connected to the controller; the electromagnets (23) are used to absorb and fix the rigid ropes (21); and the controller is used to control the electromagnets (23).

3. The controllable flexible photovoltaic support according to claim 2, characterized in that: The electromagnet (23) comprises a first electromagnet (231), a second electromagnet (232) and a third electromagnet (233), wherein the first electromagnet (231), the second electromagnet (232) and the third electromagnet (233) are sequentially arranged at the inlet end of the cylindrical installation cavity.

4. The controllable flexible photovoltaic support according to claim 2, characterized in that: The adsorption end of the rigid rope (21) is provided with an iron ring that cooperates with the electromagnet (23).

5. The controllable flexible photovoltaic support according to claim 1, characterized in that: A pressure sensor is provided in the middle of each rigid rope (21).

6. The controllable flexible photovoltaic support according to claim 1, characterized in that: The first air flow channel (15) and the second air flow channel (16) are cross-connected in the middle.

7. The controllable flexible photovoltaic support according to claim 1, characterized in that: The elastic airbag (6) is in the shape of a bellows, one end of the elastic airbag (6) is closed, and the other end is provided with a connection hole that matches the hollow connecting rod (5).

8. The controllable flexible photovoltaic support according to claim 1, characterized in that: A plurality of mounting rods (7) are provided at the bottom of the bracket body (1).

9. The controllable flexible photovoltaic support according to claim 1, characterized in that: The first air inlet (11) of the first air flow channel (15) and the second air inlet (12) of the second air flow channel (16) are both arranged on the upper back side of the bracket body (1).

10. A control method for a controllable flexible photovoltaic support according to any one of claims 1 to 9, characterized in that: The steps include: S1. After the flexible photovoltaic bracket starts working, the pressure sensor detects the tension data of the rigid rope and sends the real-time tension data to the controller; S2. Calculate the distance difference through the over-limit wind protection model δ ; The specific over-limit wind protection model is as follows: ； in, x is the elastic deformation of the rigid rope, F The tension on the rigid rope is measured by the pressure sensor. k is the Hooke coefficient of the rigid rope; a It is the distance from the intersection of the rear side of the base and the traction bracket in the vertical direction to the top installation point of the connecting rod. b is the effective working length of the connecting rod, d is the working length of the bracket body, L is the distance between the rigid rope connection point and the intersection of the straight line where the hollow connecting rod axis lies and the rigid rope axis; The distance from the intersection of the support body and the hollow connecting rod axis to the intersection of the hollow connecting rod axis and the rigid rope axis in normal state, s It is the distance from the intersection point of the support body and the axis of the hollow connecting rod to the intersection point of the axis of the hollow connecting rod and the axis of the rigid rope during operation; S3, set the starting difference of the first level protection state to δ 1. The starting difference of the secondary protection state is δ 2. The starting difference of the three-level protection state is δ 3. Determine the working difference range of the electromagnet under several levels of protection, where ; S4, the controller calculates the distance difference obtained in step S2 δ Compare with the working difference range corresponding to the set electromagnet to obtain the working conditions and working quantities of several electromagnets; specifically: When the distance difference When the controller does not issue any command, the flexible photovoltaic bracket body is automatically adjusted through the rigid rope and elastic airbag; When the distance difference When the controller issues a command to control one of the first electromagnet (231), the second electromagnet (232) and the third electromagnet (233) to be powered on and enter a first-level protection state; When the distance difference When the controller issues a command to control any two of the first electromagnet (231), the second electromagnet (232) and the third electromagnet (233) to be powered on and enter a secondary protection state; When the distance difference When the controller sends out a command to control the first electromagnet (231), the second electromagnet (232) and the third electromagnet (233) to be powered on and enter the third level protection state, the controller sends out an alarm signal at the same time, and the staff takes further follow-up protection measures.

Images