Energy collection device and photovoltaic power generation system

Abstract

The invention belongs to the field of photovoltaic power generation, and particularly relates to an energy collecting device and a photovoltaic power generation system.The energy collecting device is used for being arranged at the joint of a steel cable and a stand column of a flexible photovoltaic support, when the steel cable generates violent vibration, the vibration can be transmitted to the position near the stand column, and at the moment, a driving annular magnet vibrates along with the steel cable; when the driving annular magnet vibrates in different directions, the driven annular magnet on the inner side of the piezoelectric sleeve in the direction approaches to generate repulsive force, so that the piezoelectric film layer deforms continuously, and mechanical energy is converted into electric energy through the piezoelectric film layer. The energy collecting device can effectively utilize vibration energy jointly caused by the photovoltaic panel and the steel cable and achieve conversion from mechanical energy to electric energy, the energy collecting device is of an annular structure, vibration in different directions is fully utilized, the structure is simple, batch production is easy, and the energy collecting device has high practical value and application prospects and is suitable for popularization and application. The method is worthy of popularization and use in the industry.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic power generation technology, and in particular to an energy collection device and a photovoltaic power generation system. Background Art

[0002] Photovoltaic power generation, as a renewable green and clean energy, has ushered in great development opportunities and has been positioned as a strategic emerging industry by many countries. At present, photovoltaic brackets mainly include two structural forms: fixed brackets and flexible brackets. Compared with fixed brackets, flexible brackets have the advantages of less steel consumption, large span, strong terrain adaptability and high cost performance, and have gradually been used in actual photovoltaic power generation projects. However, due to the low frequency and light weight of the flexible photovoltaic bracket structure, it is easy to vibrate under wind load. People usually pay more attention to the suppression of vibration of flexible photovoltaic bracket structures and the research on wind resistance, but have not thought about the utilization of vibration of flexible photovoltaic bracket structures. Summary of the invention

[0003] The embodiments of the present application provide an energy collection device that utilizes the vibration generated by a flexible photovoltaic support structure under wind load as a vibration source excitation, and a photovoltaic power generation system using the energy collection device.

[0004] To this end, according to one aspect of the present application, there is provided an energy collection device for a flexible photovoltaic support, the flexible photovoltaic support comprising a column and a steel cable connected between the columns and used to install a photovoltaic panel, the energy collection device comprising a piezoelectric sleeve, a connecting assembly, an active annular magnet and a driven annular magnet;

[0005] The piezoelectric sleeve includes an inner metal layer, a piezoelectric film layer and an outer metal layer which are arranged in sequence from the inside to the outside. The piezoelectric sleeve is used to be sleeved on the outside of the steel cable and close to the column. A gap is provided between the inner wall of the piezoelectric sleeve and the outer wall of the steel cable. The connecting assembly is arranged at one end of the piezoelectric sleeve close to the column and is used to fix the piezoelectric sleeve on the column. The active annular magnet is sleeved and fixed on the steel cable inside the piezoelectric sleeve, and the driven annular magnet is coaxially fixed on the inner wall of the piezoelectric sleeve. A gap is provided between the driven annular magnet and the active annular magnet in the radial direction, and the inner side of the driven annular magnet has the same magnetic pole as the outer side of the active annular magnet.

[0006] Optionally, the piezoelectric film layer is a PVDF piezoelectric film.

[0007] Optionally, the driven annular magnet is arranged on the inner side of one end of the piezoelectric sleeve away from the connecting assembly, and the active annular magnet is sleeved and fixed on a steel cable inside the driven annular magnet.

[0008] Optionally, the active annular magnet and the driven annular magnet are both flexible annular magnets.

[0009] Optionally, the connecting assembly includes a flange and connecting screws, the flange is fixedly connected to one end of the piezoelectric sleeve, and the connecting screws are used to fix the flange on the column.

[0010] Optionally, a side of the flange facing away from the piezoelectric sleeve is in contact with an outer wall of the column near the steel cable.

[0011] According to another aspect of the present application, a photovoltaic power generation system is provided, comprising a flexible photovoltaic bracket, a photovoltaic panel and an energy collection device as described above, wherein the photovoltaic panel is mounted on a steel cable of the flexible photovoltaic bracket, and the energy collection device is arranged at the connection between the steel cable of the flexible photovoltaic bracket and a column.

[0012] Optionally, the photovoltaic power generation system includes an energy storage device and a plurality of the energy collection devices, an energy collection device is provided at the connection between the steel cable of the flexible photovoltaic bracket and the column, the piezoelectric film layer in each of the energy collection devices is electrically connected to the energy storage device, and the energy storage device is used to store the electric energy collected by each of the energy collection devices.

[0013] Optionally, the photovoltaic power generation system also includes a synthetic jet exciter, a power supply circuit, a controller and a sensor for monitoring wind speed and pressure. The synthetic jet exciter is arranged below the photovoltaic panel, and the jet outlet of the synthetic jet exciter faces the photovoltaic panel. The input end of the power supply circuit is electrically connected to the energy collection device and the photovoltaic panel, the output end of the power supply circuit is electrically connected to the synthetic jet exciter, and the controller is electrically connected to the power supply circuit and the sensor. Under the control of the controller, the synthetic jet exciter sprays airflow toward the photovoltaic panel to suppress the vibration of the photovoltaic panel.

[0014] The beneficial effects of the energy collection device and photovoltaic power generation system provided by the present application are as follows: compared with the prior art, the energy collection device of the present application is used to be arranged at the connection between the steel cable and the column of the flexible photovoltaic bracket. When the environmental wind load acts on the steel cable, the steel cable vibrates, and at the same time, it will drive the photovoltaic panel and its bracket structure to vibrate. The greater the environmental wind load, the more violent the vibration generated. Conversely, due to the vibration of the photovoltaic panel and its bracket structure, it will cause the steel cable connecting it to vibrate. This repeated process will produce huge vibration transmission. When the environmental wind load increases further, it will directly have a huge impact on the photovoltaic panel, causing its vibration effect to be further superimposed, and the vibration transmission will be more obvious at this time. When the steel cable vibrates violently, since both ends of the steel cable are fixed on the pillars, the vibration will eventually be transmitted to the vicinity of the pillars. At this time, the active annular magnet vibrates with the steel cable. When the active annular magnet vibrates in different directions, the driven annular magnet on the inner side of the piezoelectric sleeve in that direction approaches and generates a repulsive force, causing the piezoelectric film layer to continuously deform. The mechanical energy is converted into electrical energy through the piezoelectric film layer, and an energy storage circuit is connected near the fixed end pillar to store the energy output by the piezoelectric film layer, completing the vibration energy collection. Since the piezoelectric sleeve is sleeved on the outside of the steel cable, the driven annular magnet is coaxially fixed on the inner wall of the piezoelectric sleeve, and the active annular magnet is sleeved and fixed on the steel cable inside the piezoelectric sleeve, the effect of multi-directional energy collection can be achieved. Since the photovoltaic power generation system adopts the energy collection device of the present application, it can generate a large amount of additional electrical energy by utilizing the vibration of the steel cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] in:

[0017] Figure 1 It is a schematic diagram of the installation structure of an energy collection device on a flexible photovoltaic support shown in an embodiment of the present application;

[0018] Figure 2 yes Figure 1 A schematic cross-sectional structure diagram of ;

[0019] Figure 3 is a schematic structural diagram of a photovoltaic power generation system shown in an embodiment of the present application;

[0020] Figure 4 It is a schematic cross-sectional structural diagram of a synthetic jet actuator in a photovoltaic power generation system shown in one embodiment of the present application.

[0021] Description of reference numerals:

[0022] 100, energy collection device; 110, piezoelectric sleeve; 111, inner metal layer; 112, piezoelectric film layer; 113, outer metal layer; 120, connecting assembly; 121, flange; 122, connecting screw; 130, active annular magnet; 140, driven annular magnet;

[0023] 200. Energy storage device;

[0024] 10. Flexible photovoltaic support; 11. Column; 12. Steel cable;

[0025] 20. Photovoltaic panels;

[0026] 30. Synthetic jet actuator;

[0027] 40. Power supply circuit;

[0028] 50. Controller;

[0029] 60. Sensor. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present application, the present application will be described more comprehensively with reference to the relevant drawings below. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many other different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0032] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which the present application belongs. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0034] As described in the background technology, due to the low frequency and light weight of the flexible photovoltaic support structure, it is easy to vibrate under wind load. People usually pay more attention to the research on the vibration suppression and wind resistance of the flexible photovoltaic support structure, but have not considered the utilization of the vibration of the flexible photovoltaic support structure.

[0035] In order to solve the above problems, according to one aspect of the present application, an embodiment of the present application provides an energy collection device, such as Figure 1-Figure 3 As shown, the energy collection device 100 is used for a flexible photovoltaic bracket 10, which includes a column 11 and a steel cable 12 connected between the columns 11 and used to install a photovoltaic panel 20. The energy collection device 100 includes a piezoelectric sleeve 110, a connecting assembly 120, an active annular magnet 130, and a driven annular magnet 140. The piezoelectric sleeve 110 includes an inner metal layer 111, a piezoelectric film layer 112, and an outer metal layer 113 arranged in sequence from the inside to the outside. The piezoelectric sleeve 110 is used to be sleeved on the outside of the steel cable 12 and close to the column 11. A gap is provided between the inner wall of the piezoelectric sleeve 110 and the outer wall of the steel cable 12. The connecting assembly 120 is arranged at one end of the piezoelectric sleeve 110 close to the column 11 and is used to fix the piezoelectric sleeve 110 on the column 11. The active annular magnet 130 is sleeved and fixed on the steel cable 12 inside the piezoelectric sleeve 110, and the driven annular magnet 140 is coaxially fixed on the inner wall of the piezoelectric sleeve 110. A gap is provided between the driven annular magnet 140 and the active annular magnet 130 in the radial direction, and the inner side of the driven annular magnet 140 has the same magnetic pole as the outer side of the active annular magnet 130.

[0036] Among them, the inner metal layer 111, the piezoelectric film layer 112 and the outer metal layer 113 are closely attached, the inner metal layer 111 and the outer metal layer 113 are thin metal sheets respectively, and the piezoelectric film layer 112 is a PVDF piezoelectric film, which is composed of polyvinylidene fluoride polymer piezoelectric material. It should be noted that the piezoelectric film layer 112 can also use other conventional piezoelectric materials in the art (piezoelectric material selection can be divided into three categories, one is piezoelectric crystals, such as quartz crystals, potassium sodium tartrate, etc.; another is polarized piezoelectric ceramics, which are artificially synthesized polycrystals, such as barium titanate, etc.; the third is organic piezoelectric materials, which are new piezoelectric materials, such as polyvinylidene fluoride, etc.). Compared with the use of piezoelectric ceramics, PVDF piezoelectric film has the quality of withstanding higher external environmental excitation.

[0037] For the piezoelectric sleeve 110, when vibration energy is transmitted, the inner metal layer 111, the piezoelectric film layer 112 and the outer metal layer 113 will deform. At this time, the inner and outer metal layers 113 and the piezoelectric film layer 112 are equivalent to capacitors, thereby realizing the conversion of mechanical energy into electrical energy.

[0038] In an embodiment of the present application, the energy collection device 100 is used to be arranged at the connection between the steel cable 12 and the column 11 of the flexible photovoltaic bracket 10. When the environmental wind load acts on the steel cable 12, the steel cable 12 vibrates, and at the same time, it will drive the photovoltaic panel 20 and its bracket structure to vibrate. The greater the environmental wind load, the more violent the vibration generated. Conversely, due to the vibration of the photovoltaic panel 20 and its bracket structure, it will cause the steel cable 12 connecting it to vibrate. This repeated process will produce huge vibration transmission. When the environmental wind load increases further, it will directly have a huge impact on the photovoltaic panel 20, causing its vibration effect to be further superimposed, and the vibration transmission will be more obvious at this time. When the steel cable 12 vibrates violently, since both ends of the steel cable 12 are fixed on the column 11, the vibration will eventually be transmitted to the vicinity of the column 11. At this time, the active annular magnet 130 vibrates with the steel cable 12. When the active annular magnet 130 vibrates in different directions, the driven annular magnet 140 on the inner side of the piezoelectric sleeve 110 in that direction approaches and generates a repulsive force, causing the piezoelectric film layer 112 to continuously deform, and the mechanical energy is converted into electrical energy through the piezoelectric film layer 112. The energy storage circuit is connected near the fixed end column 11 to store the energy output by the piezoelectric film layer 112, completing the vibration energy collection. Since the piezoelectric sleeve 110 is sleeved on the outside of the steel cable 12, the driven annular magnet 140 is coaxially fixed on the inner wall of the piezoelectric sleeve 110, and the active annular magnet 130 is sleeved and fixed on the steel cable 12 inside the piezoelectric sleeve 110, the effect of multi-directional energy collection can be achieved. At the same time, the active annular magnet 130 and the driven annular magnet 140 repel each other with the same poles during vibration, which is more conducive to increasing the deformation and vibration amplitude of the piezoelectric sleeve 110.

[0039] In general, the energy collection device 100 can effectively utilize the vibration energy caused by the photovoltaic panel and the steel cable 12 and realize the conversion of mechanical energy into electrical energy. The energy collection device 100 has an annular structure, which can fully utilize vibrations in different directions. It has a simple structure and is easy to mass produce. It has strong practical value and application prospects and is worthy of promotion and use in the industry.

[0040] In one embodiment, if Figure 2 As shown, the driven annular magnet 140 is disposed on the inner side of the piezoelectric sleeve 110 away from the end of the connecting assembly 120 , and the active annular magnet 130 is sleeved and fixed on the steel cable 12 inside the driven annular magnet 140 .

[0041] After the steel cable 12 vibrates, the side wall of the piezoelectric sleeve 110 is deformed by the combined action of gravity and repulsion of the driven annular magnet 140, generating a voltage output. By arranging the driven annular magnet 140 at the end of the piezoelectric sleeve 110 away from the connecting assembly 120, the vibration and bending amplitude of the piezoelectric sleeve 110 is increased.

[0042] Preferably, both the active annular magnet 130 and the driven annular magnet 140 are flexible annular magnets made of soft magnetic materials, which do not affect the bending deformation of the steel cable 12 and the piezoelectric sleeve 110 .

[0043] In one embodiment, if Figure 1-Figure 2 As shown, the connecting assembly 120 includes a flange 121 and connecting screws 122 . The flange 121 is fixedly connected to one end of the piezoelectric sleeve 110 . The connecting screws 122 are used to fix the flange 121 on the column 11 .

[0044] Furthermore, the side of the flange 121 away from the piezoelectric sleeve 110 is in contact with the outer wall of the column 11 near the steel cable 12. Specifically, when the outer wall of the column 11 near the steel cable 12 is a plane, the side of the flange 121 away from the piezoelectric sleeve 110 is a plane; when the outer wall of the column 11 near the steel cable 12 is a flat arc surface, the side of the flange 121 away from the piezoelectric sleeve 110 is an arc surface. With this design, the contact area between the flange 121 and the column 11 is increased, thereby improving the firmness of the connection.

[0045] According to another aspect of the present application, the embodiment of the present application also provides a photovoltaic power generation system, such as Figure 3 As shown, the photovoltaic power generation system includes a flexible photovoltaic bracket 10, a photovoltaic panel 20 and an energy collection device 100 in any of the above embodiments, the photovoltaic panel 20 is installed on the steel cable 12 of the flexible photovoltaic bracket 10, and the energy collection device 100 is arranged at the connection between the steel cable 12 of the flexible photovoltaic bracket 10 and the column 11.

[0046] When the environmental wind load acts on the steel cable 12, the steel cable 12 vibrates, and at the same time, it will drive the photovoltaic panel 20 and its support structure to vibrate. The greater the environmental wind load, the more violent the vibration. Conversely, the vibration of the photovoltaic panel 20 and its support structure will cause the steel cable 12 connected to it to vibrate. This will cause huge vibration transmission. When the environmental wind load increases further, it will directly have a huge impact on the photovoltaic panel 20, further superimposing its vibration effect, and the vibration transmission will be more obvious. Since the photovoltaic power generation system adopts the energy collection device 100 in the above embodiment, it can generate electricity by using the vibration of the flexible photovoltaic support 10.

[0047] Furthermore, the photovoltaic power generation system includes an energy storage device 200 and multiple energy collection devices 100. An energy collection device 100 is provided at the connection between the steel cable 12 of the flexible photovoltaic bracket 10 and each column 11. The piezoelectric film layer 112 in each energy collection device 100 is electrically connected to the energy storage device 200. The energy storage device 200 is used to store the electric energy collected by each energy collection device 100. The energy storage device 200 can be a storage device such as a capacitor or a battery.

[0048] From the theoretical knowledge of vibration dynamics, it can be known that within a certain range, the output voltage of the piezoelectric material increases with the increase of the end vibration amplitude. When the vibration frequency is close to the natural frequency of the system, resonance occurs, and the output of the energy collection device 100 reaches a peak value. Therefore, when installing the energy collection device 100 in this application, the local annual average wind pressure, monthly average wind pressure and other related data should be fully investigated to obtain the frequency of vibration generated by the structure in theory, and then the device is reasonably selected to achieve the best effect.

[0049] In one embodiment, if Figure 3-Figure 4 As shown, the photovoltaic power generation system also includes a synthetic jet exciter 30, a power supply circuit 40, a controller 50 and a sensor 60 for monitoring wind speed and pressure. The synthetic jet exciter 30 is arranged below the photovoltaic panel 20, and the jet port of the synthetic jet exciter 30 faces the photovoltaic panel 20. The input end of the power supply circuit 40 is electrically connected to the energy collection device 100 and the photovoltaic panel 20, and the output end of the power supply circuit 40 is electrically connected to the synthetic jet exciter 30. The controller 50 is electrically connected to the power supply circuit 40 and the sensor 60. Under the control of the controller 50, the synthetic jet exciter 30 sprays airflow toward the photovoltaic panel 20 to suppress the vibration of the photovoltaic panel 20.

[0050] Based on the energy collected by the energy collection device 100, the synthetic jet actuator 30 is installed under the flexible photovoltaic panel 20 to suppress vibration. It should be noted that the intensity of the jet flow is determined by the control effect of achieving flow separation. It is not a fixed value under different environments. It only needs the jet to achieve control flow separation and thus suppress vibration.

[0051] like Figure 4 As shown, the synthetic jet actuator 30 is manufactured using MEMS technology, with a short square cavity, which is integrally processed on a silicon-based material using an etching method. The bottom surface of the cavity is 75 mm × 75 mm. A narrow slit is opened on the upper surface of the cavity, with a size of 75 mm × 0.5 mm. The bottom surface of the cavity is closed by a polyimide film with added metal components, and a round piezoelectric ceramic piece is integrated on the outer surface.

[0052] Principle: When the synthetic jet actuator 30 is working, the piezoelectric ceramics produce the reverse piezoelectric effect under the action of the periodically changing voltage signal, and the flexible film on the bottom of the cavity vibrates periodically, converting the input electrical energy into the kinetic energy of the film vibration, so that an unsteady jet is generated at the narrow opening of the actuator. When the film vibrates along the -x direction, the cavity pressure decreases, and the nearby gas enters the cavity through the opening. When the film vibrates along the +x direction, the pressure in the cavity increases, and the gas in the cavity is discharged from the cavity through the outlet slit. During the alternating blowing and suction of the gas, the airflow near the opening slit is subjected to strong shearing, so that flow separation occurs at the edge of the outlet, and then rolls up with the discharged fluid to form a vortex pair. When entering the next suction process, the vortex pair formed in the previous blowing process and moving downstream has been far away from the vicinity of the outlet, so it is not affected by the suction. In the continuous alternating blowing and suction process, the gas forms a series of vortex pairs that migrate downstream. Once formed, the vortex will migrate downstream at a self-induced speed. During the migration process, the energy of the vortex pair is continuously consumed, and its coherent structure gradually disappears. The vortex pair becomes blurred and eventually evolves into a scattered turbulent flow until it merges with the ambient gas. The periodic film vibration continuously generates vortex pairs and repeats the development and evolution process of the vortex pair, thus forming a synthetic jet.

[0053] The synthetic jet exciter 30 utilizes the air near the flexible photovoltaic panel 20 to provide air flow into the synthetic jet exciter 30. The synthetic jet exciter 30 includes a front side hole and an upper side hole. The low-speed gas is absorbed from the windward front or above the upper side hole through the front side hole and then ejected from the upper side hole in a direction perpendicular to the photovoltaic panel 20.

[0054] The electric energy generated by the energy collection device 100 is used to work through an external circuit and a sensor 60, forming an organic combination of energy collection and vibration suppression.

[0055] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An energy collection device for a flexible photovoltaic support, the flexible photovoltaic support comprising columns and steel cables connected between the columns and used to install photovoltaic panels, characterized in that: The energy collection device includes a piezoelectric sleeve, a connecting assembly, an active annular magnet and a driven annular magnet; The piezoelectric sleeve includes an inner metal layer, a piezoelectric film layer and an outer metal layer which are arranged in sequence from the inside to the outside. The piezoelectric sleeve is used to be sleeved on the outside of the steel cable and close to the column. A gap is provided between the inner wall of the piezoelectric sleeve and the outer wall of the steel cable. The connecting assembly is arranged at one end of the piezoelectric sleeve close to the column and is used to fix the piezoelectric sleeve on the column. The active annular magnet is sleeved and fixed on the steel cable inside the piezoelectric sleeve, and the driven annular magnet is coaxially fixed on the inner wall of the piezoelectric sleeve. A gap is provided between the driven annular magnet and the active annular magnet in the radial direction, and the inner side of the driven annular magnet has the same magnetic pole as the outer side of the active annular magnet.

2. The energy collection device according to claim 1, characterized in that: The piezoelectric film layer is a PVDF piezoelectric film.

3. The energy collection device according to claim 1, characterized in that: The driven annular magnet is arranged on the inner side of one end of the piezoelectric sleeve away from the connecting component, and the active annular magnet is sleeved and fixed on the steel cable inside the driven annular magnet.

4. The energy collection device according to claim 1, characterized in that: The active annular magnet and the driven annular magnet are both flexible annular magnets.

5. The energy collection device according to claim 1, characterized in that: The connecting assembly includes a flange and connecting screws. The flange is fixedly connected to one end of the piezoelectric sleeve, and the connecting screws are used to fix the flange on the column.

6. The energy collection device according to claim 5, characterized in that: The side of the flange facing away from the piezoelectric sleeve is in contact with the outer wall of the column near the steel cable.

7. A photovoltaic power generation system, characterized in that: It comprises a flexible photovoltaic support, a photovoltaic panel and an energy collection device as described in any one of claims 1 to 6, wherein the photovoltaic panel is mounted on a steel cable of the flexible photovoltaic support, and the energy collection device is arranged at the connection between the steel cable of the flexible photovoltaic support and a column.

8. The photovoltaic power generation system according to claim 7, characterized in that: The photovoltaic power generation system includes an energy storage device and a plurality of energy collection devices. An energy collection device is provided at the connection between the steel cable and the column of the flexible photovoltaic bracket. The piezoelectric film layer in each energy collection device is electrically connected to the energy storage device. The energy storage device is used to store the electric energy collected by each energy collection device.

9. The photovoltaic power generation system according to claim 8, characterized in that: The photovoltaic power generation system also includes a synthetic jet exciter, a power supply circuit, a controller and a sensor for monitoring wind speed and pressure. The synthetic jet exciter is arranged below the photovoltaic panel, and the jet port of the synthetic jet exciter faces the photovoltaic panel. The input end of the power supply circuit is electrically connected to the energy collection device and the photovoltaic panel, the output end of the power supply circuit is electrically connected to the synthetic jet exciter, and the controller is electrically connected to the power supply circuit and the sensor. Under the control of the controller, the synthetic jet exciter sprays airflow toward the photovoltaic panel to suppress the vibration of the photovoltaic panel.

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