Photovoltaic power generation mechanism and photovoltaic system

Abstract

The utility model discloses a photovoltaic power generation mechanism and a photovoltaic system, and relates to the technical field of photovoltaic power generation. The photovoltaic power generation mechanism comprises a supporting frame, a rotating frame, a photovoltaic assembly, an attitude sensor, a controller and an electromagnetic damper. The photovoltaic module is installed on the rotating frame, the rotating frame is rotatably connected to the top of the supporting frame, the electromagnetic damper is movably installed between the supporting frame and the rotating frame, the attitude sensor is installed on the rotating frame and electrically connected with the controller, and the attitude sensor is used for detecting the actual amplitude of the rotating frame under the wind action. The controller is electrically connected with the electromagnetic damper and used for controlling the damping of the electromagnetic damper to be increased when the actual amplitude is larger than the preset amplitude. The photovoltaic power generation mechanism provided by the utility model can effectively avoid resonance under the action of wind power, thereby improving the safety and ensuring the power generation effect.

Description

Technical Field

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

[0002] At present, in photovoltaic power generation applications, photovoltaic modules are generally installed on adjustable brackets, and the tilt angle of the photovoltaic modules is regularly adjusted using the adjustable brackets to increase the amount of sunlight radiation received by the light-receiving surface of the photovoltaic modules throughout the year, thereby increasing the power generation of the photovoltaic modules throughout the year. However, in this way, since the rotation angle of the adjustable bracket is adjustable, in windy weather, the photovoltaic modules will drive the adjustable bracket to resonate under the action of wind. If the amplitude is too large, it may cause the connecting screws of the adjustable bracket to loosen, or even directly damage the adjustable bracket, which is less safe.

[0003] In view of this, it is particularly important to design and manufacture a safe and stable photovoltaic power generation mechanism and photovoltaic system, especially in photovoltaic power generation. Utility Model Content

[0004] The utility model aims to provide a photovoltaic power generation mechanism, which can effectively avoid resonance under the action of wind, improve safety and ensure power generation effect.

[0005] Another object of the utility model is to provide a photovoltaic system that can effectively avoid resonance under the action of wind, improve safety, and ensure power generation effect.

[0006] The utility model is realized by adopting the following technical solutions.

[0007] A photovoltaic power generation mechanism includes a support frame, a rotating frame, a photovoltaic module, a posture sensor, a controller and an electromagnetic damper. The photovoltaic module is installed on the rotating frame, the rotating frame is rotatably connected to the top of the support frame, the electromagnetic damper is movably installed between the support frame and the rotating frame, the posture sensor is installed on the rotating frame and is electrically connected to the controller, the posture sensor is used to detect the actual amplitude of the rotating frame under the action of wind, the controller is electrically connected to the electromagnetic damper, and the controller is used to control the damping of the electromagnetic damper to increase when the actual amplitude is greater than the preset amplitude.

[0008] Optionally, one end of the electromagnetic damper is hinged to the support frame, and the other end is hinged to the rotating frame.

[0009] Optionally, the rotating frame includes a main beam and a connecting bracket, the connecting bracket is connected to the main beam, the extending direction of the connecting bracket is perpendicular to the extending direction of the main beam, and the electromagnetic damper is hinged to one end of the connecting bracket away from the main beam.

[0010] Optionally, the connecting bracket includes a mounting frame, a first side plate, a connecting plate and a second side plate, the first side plate is connected to the second side plate through the connecting plate, the first side plate and the second side plate are arranged in parallel and spaced apart, the electromagnetic damper extends between the first side plate and the second side plate, and is hinged to the first side plate and the second side plate at the same time through a first hinge column, the first side plate, the connecting plate and the second side plate are all connected to the mounting frame, the mounting frame is disposed outside the main beam and connected to the main beam.

[0011] Optionally, the connecting bracket is cross-arranged with the main beam, and there are two electromagnetic dampers, which are arranged at two ends of the connecting bracket opposite to each other.

[0012] Optionally, the rotating frame also includes a mounting beam, which is arranged to cross the main beam vertically and is connected to the main beam, the photovoltaic component is installed on the mounting beam, and the attitude sensor is connected to one end of the mounting beam.

[0013] Optionally, the rotating frame further includes a reinforcing frame, which includes a first reinforcing bar, a connecting block, and a second reinforcing bar connected in sequence, wherein the first reinforcing bar and the second reinforcing bar are arranged at an obtuse angle and are both connected to the mounting beam.

[0014] Optionally, the support frame is provided with a limit member, which includes a fixing portion, a connecting portion and a flange portion connected in sequence, the fixing portion and the flange portion are arranged in parallel and at intervals, the electromagnetic damper extends between the fixing portion and the flange portion, and is hinged to the fixing portion and the flange portion at the same time through a second hinge column.

[0015] Optionally, the photovoltaic power generation mechanism further includes a drive motor, which is connected to the rotating frame, and the drive motor is used to drive the rotating frame to rotate relative to the supporting frame.

[0016] A photovoltaic system comprises a plurality of the above-mentioned photovoltaic power generation mechanisms, which are arranged side by side. The photovoltaic power generation mechanisms comprise a support frame, a rotating frame, a photovoltaic assembly, a posture sensor, a controller and an electromagnetic damper. The photovoltaic assembly is mounted on the rotating frame, the rotating frame is rotatably connected to the top of the support frame, the electromagnetic damper is movably mounted between the support frame and the rotating frame, the posture sensor is mounted on the rotating frame and is electrically connected to the controller, the posture sensor is used to detect the actual amplitude of the rotating frame under the action of wind, the controller is electrically connected to the electromagnetic damper, and the controller is used to control the damping of the electromagnetic damper to increase when the actual amplitude is greater than the preset amplitude.

[0017] The photovoltaic power generation mechanism and photovoltaic system provided by the utility model have the following beneficial effects:

[0018] The photovoltaic power generation mechanism provided by the utility model has a photovoltaic component installed on a rotating frame, the rotating frame is rotatably connected to the top of the support frame, an electromagnetic damper is movably installed between the support frame and the rotating frame, a posture sensor is installed on the rotating frame and is electrically connected to a controller, the posture sensor is used to detect the actual amplitude of the rotating frame under the action of wind, the controller is electrically connected to the electromagnetic damper, and the controller is used to control the damping of the electromagnetic damper to increase when the actual amplitude is greater than the preset amplitude. Compared with the prior art, the photovoltaic power generation mechanism provided by the utility model can effectively avoid resonance under the action of wind, improve safety, and ensure power generation effect because it adopts an electromagnetic damper movably installed between the support frame and the rotating frame and a posture sensor installed on the rotating frame.

[0019] The photovoltaic system provided by the utility model includes a photovoltaic power generation mechanism, which can effectively avoid resonance under the action of wind force, improve safety, and ensure power generation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic structural diagram of a photovoltaic power generation mechanism provided by an embodiment of the utility model from one perspective;

[0022] Figure 2 A schematic structural diagram of a photovoltaic power generation mechanism provided by an embodiment of the utility model from another perspective;

[0023] Figure 3 for Figure 2 A partial enlarged view of middle III;

[0024] Figure 4 for Figure 2 A partial enlarged view of IV.

[0025] Icons: 100-photovoltaic power generation mechanism; 110-support frame; 111-limiting member; 1111-fixing part; 1112-connecting part; 1113-flanging part; 120-rotating frame; 121-main beam; 122-connecting bracket; 1221-installation frame; 1222-first side plate; 1223-connecting plate; 1224-second side plate; 123-installation beam; 124-reinforcement frame; 1241-first reinforcement bar; 1242-connecting block; 1243-second reinforcement bar; 130-photovoltaic module; 140-attitude sensor; 150-controller; 160-electromagnetic damper. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] In the description of the present utility model, it should be noted that the terms "inside", "outside", "upper", "lower", "horizontal", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does 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 utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" 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 it can be indirectly connected 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 the present invention can be understood according to specific circumstances.

[0031] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0032] Please refer to Figures 1 to 4The embodiment of the utility model provides a photovoltaic system (not shown) for photovoltaic power generation, which can effectively avoid resonance under the action of wind, improve safety and ensure power generation effect.

[0033] The photovoltaic system includes a plurality of photovoltaic power generation mechanisms 100, which are arranged side by side and jointly cover a power generation area to receive sunlight irradiated on the power generation area. The plurality of photovoltaic power generation mechanisms 100 work together to increase power generation.

[0034] The photovoltaic power generation mechanism 100 includes a support frame 110, a rotating frame 120, a photovoltaic module 130, a posture sensor 140, a controller 150, an electromagnetic damper 160 and a drive motor (not shown). The support frame 110 is fixedly installed in the power generation area, and the rotating frame 120 is rotatably connected to the top of the support frame 110. The rotating frame 120 can rotate relative to the support frame 110 around a rotation center, and the support frame 110 can support and limit the rotating frame 120. The drive motor is installed on the support frame 110 and connected to the rotating frame 120. The drive motor is used to drive the rotating frame 120 to rotate relative to the support frame 110. The photovoltaic assembly 130 is installed on the rotating frame 120. The photovoltaic assembly 130 is used to convert light energy into electrical energy through the photovoltaic effect of the semiconductor interface, thereby realizing the photovoltaic power generation function. The rotating frame 120 can drive the photovoltaic assembly 130 to rotate relative to the support frame 110 so that the light-receiving surface of the photovoltaic assembly 130 receives the maximum amount of sunlight radiation, thereby increasing the power generation of the photovoltaic assembly 130.

[0035] It should be noted that the electromagnetic damper 160 is movably installed between the support frame 110 and the rotating frame 120, and the electromagnetic damper 160 is used to adjust the damping between the support frame 110 and the rotating frame 120. When the damping of the electromagnetic damper 160 is the largest, the electromagnetic damper 160 applies the largest resistance to the rotating frame 120 to prevent the rotating frame 120 from rotating relative to the support frame 110; when the damping of the electromagnetic damper 160 is the smallest (the damping is zero), the electromagnetic damper 160 no longer applies resistance to the rotating frame 120, and at this time, the rotating frame 120 can drive the photovoltaic assembly 130 to rotate relative to the support frame 110 under the action of the driving motor, so as to achieve the inclination adjustment of the photovoltaic assembly 130.

[0036] Furthermore, the attitude sensor 140 is mounted on the rotating frame 120 and is electrically connected to the controller 150. The attitude sensor 140 is used to detect the actual amplitude of the rotating frame 120 under the action of wind force, and transmit the actual amplitude to the controller 150 in the form of an electrical signal. The controller 150 is electrically connected to the electromagnetic damper 160, and the controller 150 is used to control the damping of the electromagnetic damper 160 according to the size of the actual amplitude. Specifically, the controller 150 is used to control the damping of the electromagnetic damper 160 to increase when the actual amplitude is greater than the preset amplitude, so as to prevent the rotating frame 120 from rotating relative to the support frame 110, thereby fixing the relative positions of the rotating frame 120 and the support frame 110, and effectively avoiding the resonance of the rotating frame 120 under the action of wind, improving safety, and ensuring the power generation effect; the controller 150 is also used to control the damping of the electromagnetic damper 160 to decrease when the actual amplitude is less than the preset amplitude, or to turn off the electromagnetic damper 160 (damping is zero). At this time, the resonance of the rotating frame 120 is small or temporarily non-existent, and will not affect the structural stability and power generation effect of the photovoltaic power generation mechanism 100.

[0037] In this embodiment, when the actual amplitude is greater than the preset amplitude, the damping of the electromagnetic damper 160 changes with the actual amplitude, that is, the larger the actual amplitude, the greater the damping of the electromagnetic damper 160, and the smaller the actual amplitude, the smaller the damping of the electromagnetic damper 160. Specifically, the damping of the electromagnetic damper 160 can be adjusted approximately linearly through the refined step value of the controller 150, that is, by setting a smaller adjustment step size to adjust the current, thereby affecting the magnetic field strength, and then adjusting the damping size. In the actual adjustment process, the controller 150 quickly converges through the PID algorithm according to the acceleration value of the actual amplitude fed back by the posture sensor 140 to achieve overall closed-loop control.

[0038] In this embodiment, the electromagnetic damper 160 of each photovoltaic power generation mechanism 100 is provided with a communication interface module so that the multiple electromagnetic dampers 160 of the multiple photovoltaic power generation mechanisms 100 in the photovoltaic system can be cascaded and expanded, thereby facilitating the coordinated adjustment of the parameters of the multiple electromagnetic dampers 160, so that the damping device in the photovoltaic system (formed by multiple electromagnetic dampers 160) has the ability to work in a coordinated manner, thereby enhancing the stability of the entire photovoltaic system.

[0039] In this embodiment, one end of the electromagnetic damper 160 is hinged to the support frame 110, and the other end is hinged to the rotating frame 120. The electromagnetic damper 160 can rotate relative to the support frame 110 and relative to the rotating frame 120, so that the electromagnetic damper 160 fixes the relative position of the rotating frame 120 and the support frame 110.

[0040] The rotating frame 120 includes a main beam 121, a connecting bracket 122, a mounting beam 123 and a reinforcing frame 124. The main beam 121 is rotatably mounted on the support frame 110 and is connected to a driving motor, which can drive the main beam 121 to rotate relative to the support frame 110. The connecting bracket 122 is connected to the main beam 121, and the extension direction of the connecting bracket 122 is perpendicular to the extension direction of the main beam 121. The electromagnetic damper 160 is hinged to one end of the connecting bracket 122 away from the main beam 121. The electromagnetic damper 160, the connecting bracket 122 and the support frame 110 together form a triangle, and the damping between the support frame 110 and the rotating frame 120 is adjusted by extending or shortening the electromagnetic damper 160.

[0041] In this embodiment, the connecting bracket 122 and the main beam 121 are cross-arranged, and there are two electromagnetic dampers 160. The two electromagnetic dampers 160 are relatively arranged at the two ends of the connecting bracket 122, and both can rotate relative to the connecting bracket 122. The two electromagnetic dampers 160 work together to provide damping between the support frame 110 and the rotating frame 120 at the same time, further preventing the rotating frame 120 from rotating relative to the support frame 110, thereby preventing the rotating frame 120 from resonating, which is safe and reliable.

[0042] Furthermore, the mounting beam 123 is arranged perpendicularly to and crosses the main beam 121 and is connected to the main beam 121. The photovoltaic module 130 is mounted on the mounting beam 123. The mounting beam 123 is used to fix and limit the photovoltaic module 130. The main beam 121 can drive the mounting beam 123 to rotate, thereby driving the photovoltaic module 130 to rotate. Specifically, the attitude sensor 140 is connected to one end of the mounting beam 123 to quickly and accurately detect the actual amplitude of the rotating frame 120.

[0043] The reinforcement frame 124 includes a first reinforcement bar 1241, a connection block 1242, and a second reinforcement bar 1243 connected in sequence. The first reinforcement bar 1241 and the second reinforcement bar 1243 are arranged at an obtuse angle and are both connected to the mounting beam 123. The main beam 121 is located between the connection block 1242 and the mounting beam 123. The first reinforcement bar 1241, the connection block 1242, and the second reinforcement bar 1243 work together to improve the structural strength of the mounting beam 123 to prevent it from being deformed or even broken due to the pressure of the photovoltaic module 130 under the action of strong wind.

[0044] The connecting bracket 122 includes a mounting frame 1221, a first side plate 1222, a connecting plate 1223, and a second side plate 1224. The first side plate 1222 is connected to the second side plate 1224 through the connecting plate 1223, the first side plate 1222 and the second side plate 1224 are arranged in parallel and spaced apart, the electromagnetic damper 160 extends between the first side plate 1222 and the second side plate 1224, and is hinged to the first side plate 1222 and the second side plate 1224 at the same time through a first hinge column (not shown), and the electromagnetic damper 160 can rotate relative to the first side plate 1222 and the second side plate 1224 at the same time to realize the hinge function of the electromagnetic damper 160. Specifically, the first side plate 1222, the connecting plate 1223 and the second side plate 1224 are all connected to the mounting frame 1221, and the mounting frame 1221 is sleeved outside the main beam 121 and connected to the main beam 121 to fix the relative position of the connecting bracket 122 and the main beam 121. In this embodiment, the mounting frame 1221, the first side plate 1222, the connecting plate 1223 and the second side plate 1224 are integrally formed to improve the connection strength.

[0045] In this embodiment, the number of the first side plate 1222, the connecting plate 1223 and the second side plate 1224 are all two, wherein one first side plate 1222, one connecting plate 1223 and one second side plate 1224 are arranged on one side of the mounting frame 1221 and are hinged to an electromagnetic damper 160, and another first side plate 1222, another connecting plate 1223 and another second side plate 1224 are arranged on the other side of the mounting frame 1221 and are hinged to another electromagnetic damper 160.

[0046] It should be noted that the support frame 110 is provided with a limit member 111, and the limit member 111 is hinged to the electromagnetic damper 160. Specifically, the limit member 111 includes a fixed portion 1111, a connecting portion 1112 and a flange portion 1113 which are connected in sequence. The fixed portion 1111 and the flange portion 1113 are arranged in parallel and spaced apart, and the electromagnetic damper 160 extends between the fixed portion 1111 and the flange portion 1113, and is hinged to the fixed portion 1111 and the flange portion 1113 at the same time through a second hinge column (not shown in the figure), and the electromagnetic damper 160 can rotate relative to the fixed portion 1111 and the flange portion 1113 at the same time to realize the hinge function of the electromagnetic damper 160.

[0047] The photovoltaic power generation mechanism 100 provided by the embodiment of the utility model has a photovoltaic assembly 130 mounted on a rotating frame 120, the rotating frame 120 is rotatably connected to the top of the support frame 110, the electromagnetic damper 160 is movably mounted between the support frame 110 and the rotating frame 120, the attitude sensor 140 is mounted on the rotating frame 120 and is electrically connected to the controller 150, the attitude sensor 140 is used to detect the actual amplitude of the rotating frame 120 under the action of wind, the controller 150 is electrically connected to the electromagnetic damper 160, and the controller 150 is used to control the electromagnetic damper 160 to increase the damping when the actual amplitude is greater than the preset amplitude. Compared with the prior art, the photovoltaic power generation mechanism 100 provided by the utility model adopts the electromagnetic damper 160 movably mounted between the support frame 110 and the rotating frame 120 and the attitude sensor 140 mounted on the rotating frame 120, so it can effectively avoid resonance under the action of wind, improve safety, and ensure power generation effect. The photovoltaic system has high power generation efficiency and is not easy to be damaged.

[0048] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A photovoltaic power generation mechanism, characterized in that: The invention comprises a support frame, a rotating frame, a photovoltaic assembly, a posture sensor, a controller and an electromagnetic damper, wherein the photovoltaic assembly is mounted on the rotating frame, the rotating frame is rotatably connected to the top of the support frame, the electromagnetic damper is movably mounted between the support frame and the rotating frame, the posture sensor is mounted on the rotating frame and is electrically connected to the controller, the posture sensor is used to detect the actual amplitude of the rotating frame under the action of wind, the controller is electrically connected to the electromagnetic damper, and the controller is used to control the damping of the electromagnetic damper to increase when the actual amplitude is greater than a preset amplitude.

2. The photovoltaic power generation mechanism according to claim 1, characterized in that: One end of the electromagnetic damper is hinged to the support frame, and the other end is hinged to the rotating frame.

3. The photovoltaic power generation mechanism according to claim 2, characterized in that: The rotating frame comprises a main beam and a connecting bracket, wherein the connecting bracket is connected to the main beam, an extending direction of the connecting bracket is perpendicular to an extending direction of the main beam, and the electromagnetic damper is hinged to an end of the connecting bracket away from the main beam.

4. The photovoltaic power generation mechanism according to claim 3, characterized in that: The connecting bracket includes a mounting frame, a first side panel, a connecting plate and a second side panel, the first side panel is connected to the second side panel via the connecting plate, the first side panel and the second side panel are arranged in parallel and spaced apart, the electromagnetic damper extends between the first side panel and the second side panel, and is hinged to the first side panel and the second side panel at the same time via a first hinge column, the first side panel, the connecting plate and the second side panel are all connected to the mounting frame, the mounting frame is sleeved outside the main beam and connected to the main beam.

5. The photovoltaic power generation mechanism according to claim 3, characterized in that: The connecting bracket is cross-arranged with the main beam, the number of the electromagnetic dampers is two, and the two electromagnetic dampers are arranged oppositely at two ends of the connecting bracket.

6. The photovoltaic power generation mechanism according to claim 3, characterized in that: The rotating frame also includes a mounting beam, which is arranged to cross the main beam vertically and is connected to the main beam. The photovoltaic component is installed on the mounting beam, and the attitude sensor is connected to one end of the mounting beam.

7. The photovoltaic power generation mechanism according to claim 6, characterized in that: The rotating frame also includes a reinforcing frame, which includes a first reinforcing bar, a connecting block, and a second reinforcing bar connected in sequence. The first reinforcing bar and the second reinforcing bar are arranged at an obtuse angle and are both connected to the mounting beam.

8. The photovoltaic power generation mechanism according to claim 2, characterized in that: The support frame is provided with a limiting member, which includes a fixing portion, a connecting portion and a flange portion connected in sequence, the fixing portion and the flange portion are arranged in parallel and spaced apart, the electromagnetic damper extends between the fixing portion and the flange portion, and is hinged to the fixing portion and the flange portion at the same time through a second hinge column.

9. The photovoltaic power generation mechanism according to claim 1, characterized in that: The photovoltaic power generation mechanism further includes a driving motor, which is connected to the rotating frame and is used to drive the rotating frame to rotate relative to the supporting frame.

10. A photovoltaic system, characterized in that: It comprises a plurality of photovoltaic power generation mechanisms as described in any one of claims 1 to 9, wherein the plurality of photovoltaic power generation mechanisms are arranged side by side.

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