A solar photovoltaic power generation system

Abstract

The present invention relates to the field of photovoltaic power generation, and in particular to a solar photovoltaic power generation system, comprising a plurality of photovoltaic modules evenly arranged on a water surface, and a limit assembly for limiting the arrangement position of the photovoltaic modules, wherein the photovoltaic modules comprise a floating shell with buoyancy, the floating shell comprises a transparent cylinder shell, the cylinder shell has a cylindrical cavity, an arc-shaped photovoltaic panel is adapted to slide in the cylindrical cavity, the photovoltaic panel can rotate along the circumference of the cylindrical cavity, annular power connection assemblies are arranged at both ends of the cylinder shell, electrode plates are fixed at both ends of the photovoltaic panel, and the photovoltaic panel is electrically connected to the power connection assemblies through electrode contacts. The present invention forms a closed cylindrical space through the cylinder shell and a boss, and limits the rotation of the arc-shaped photovoltaic panel, so that the photovoltaic panel is always at the bottom of the cylinder shell under the action of gravity, so as to ensure that when the photovoltaic module is shaken by the action of the water surface, the photovoltaic panel always maintains a stable upper surface to receive sunlight, thereby achieving efficient photovoltaic power generation.

Description

Technical Field

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

[0002] Solar power generation is currently a popular way to obtain new energy. It uses the photovoltaic effect of photovoltaic cells to directly convert solar radiation energy into electrical energy. In order to obtain a large amount of electricity, a number of photovoltaic panels are arranged on the ground to form a large power generation area, alleviating the problem of electricity consumption in life and production.

[0003] The existing patent document CN106877807A discloses a manual dual-axis tracking solar photovoltaic power generation system, which includes an adjustable bracket for solar panels, a panel fixing frame, a crossbeam, a transmission belt, a sun azimuth tracker, etc. The adjustable bracket is mainly composed of a steel pipe, including a triangular bracket seat, a semicircular support rod, etc. The hole on the triangular bracket seat is coaxially fixed with the holes at different positions on the semicircular support rod by a latch to achieve angle adjustment and fixation of the support rod. The solar panel fixing frame is composed of a profile, a force transmission rod, etc. The two ends of the force transmission rod are movably connected to the transmission belt, and the transmission belt is used to realize the synchronous rotation of multiple solar panels. The sun azimuth tracker is composed of a hexahedral box with a hole on the top of the box for light to enter the bottom of the box to form a light spot. There is a "cross" mark on the bottom surface of the box. By adjusting two semicircular support rods in different directions, the light spot is at the intersection of the "cross" mark to achieve dual-axis tracking of the sun's azimuth.

[0004] Most of the existing power generation systems are set up on the ground, occupying a large space. If photovoltaic panels are set up on the water surface, it will greatly save the ground space and reduce the evaporation of sunlight on the water surface, which has outstanding advantages.

[0005] It is ideal to place photovoltaic modules on the water surface in a floating manner. However, due to the frequent fluctuations of the water surface, the photovoltaic panels shake with the water surface, and the corresponding angle between the photovoltaic panels and the sunlight changes all the time. It is not convenient to fix the photovoltaic panels in a specific position according to the angle of sunlight to maintain efficient power generation. Summary of the invention

[0006] The purpose of the present invention is to solve the following problems existing in the prior art: it is a more ideal method to set photovoltaic components on the water surface in a floating manner. However, due to the frequent fluctuations of the water surface, the photovoltaic panels shake with the water surface, and the corresponding angle between the photovoltaic panels and the sunlight changes all the time. It is not convenient to fix the photovoltaic panels at a specific position according to the angle of sunlight to maintain efficient power generation.

[0007] In order to solve the problems existing in the prior art, the present invention provides a solar photovoltaic power generation system, comprising a plurality of photovoltaic modules evenly arranged on the water surface, and a limit assembly for limiting the arrangement position of the photovoltaic modules, the photovoltaic modules comprising a floating shell with buoyancy, the floating shell comprising a transparent cylinder shell, the cylinder shell having a cylindrical cavity, an arc-shaped photovoltaic panel is adapted to slide in the cylindrical cavity, the photovoltaic panel can rotate along the circumference of the cylindrical cavity, annular power connection components are arranged at both ends of the cylinder shell, electrode plates are fixed at both ends of the photovoltaic panel, electrode contacts that are in sliding contact with the power connection components are fixed on the surface of the electrode plates, and the photovoltaic The panel is electrically connected to the power connection component through the electrode contact block, and the limit device circles the water surface in a limited area. Several groups of photovoltaic components float on the water surface, and the photovoltaic panel is at the bottom of the cylindrical cavity. The sunlight passes through the shell and shines on the upper surface of the photovoltaic panel to generate photovoltaic power. The electric energy generated by the photovoltaic panel is transmitted to the power storage and electrical equipment on the shore through the electrode contact block and the power connection component. When the water surface causes the shell to shake, the photovoltaic panel slides with the shell under the action of gravity and is always at the bottom of the shell, maintaining a stable angle of sunlight exposure, and the electrode contact block slides in contact with the annular power connection component to keep the circuit unobstructed at all times.

[0008] Preferably, the bending angle of the photovoltaic panel is less than 150°, so that the curved upper surface of the photovoltaic panel is exposed to light without obstruction.

[0009] Preferably, the power connection component includes an electrode ring, the diameter of the electrode ring is smaller than the diameter of the cylindrical cavity, two electrode rings are concentrically arranged at both ends of the cylindrical cavity, a gap is provided between the electrode ring and the inner wall of the cylinder shell, the electrode plate is located in the gap, the electrode contact block is in aligning and sliding contact with the electrode ring, a sealing hose is fixedly connected between adjacent photovoltaic components, a line electrically connected to the electrode ring is inserted in the sealing hose, the photovoltaic panel is always attached to the inner wall of the cylinder shell through the gap between the electrode ring and the inner wall of the cylinder shell, and can rotate relative to the cylinder shell around the gap, and the electrode contact block is in sliding contact with the outer wall of the electrode ring to maintain stable electrical conduction when the photovoltaic panel rotates relative to the cylinder shell, and the adjacent photovoltaic components are connected as a whole through the sealing hose, which is also used for closed line conduction.

[0010] Preferably, one end of the cylindrical shell is sealed and the other end has a threaded opening, a boss is fixed inside the sealed end of the cylindrical shell, an end cap is threadedly mounted on the threaded opening end of the cylindrical shell, the inner end of the end cap has a reduced diameter portion, the electrode rings are respectively fixed to the outside of the boss and the reduced diameter portion of the end cap, the end cap is threadedly connected to the cylindrical shell to form a closed space inside the cylindrical shell to prevent the photovoltaic panels and circuits from contacting water, and the end cap is opened for installation and maintenance of the photovoltaic panels and circuits.

[0011] Preferably, a strip seat is fixed to the radial side of the photovoltaic panel, and screws are fixed on the surface of the strip seat with equidistant threads. The strip seat is located on one side of the photovoltaic panel, and cooperates with the screws on its surface to change the center of gravity position of the photovoltaic panel, so that the photovoltaic panel has a certain deflection angle at the bottom of the cylinder shell to achieve the best irradiation angle. The deflection amount of the photovoltaic panel is changed by increasing or decreasing the number of screws, which is used to adjust to the lighting in different regions.

[0012] Preferably, a cylindrical metal part is rotated on the contact surface between the electrode contact block and the electrode ring, and the surface of the cylindrical cavity is coated with a transparent polytetrafluoroethylene layer to reduce the friction between the photovoltaic panel and the electrode ring and the cylinder shell, making the rotation more sensitive.

[0013] Preferably, the limiting assembly includes rectangularly distributed base columns, a number of photovoltaic components are evenly arranged within the rectangular range of the base column distribution, and the photovoltaic components are arranged into multiple groups, each group of photovoltaic components is connected to a conductive steel wire, and the limiting steel wires are connected between the base columns located on the circular end face side of the photovoltaic components, and the conductive steel wires are connected to the limiting steel wires. The base columns are inserted in the water area as a force basis, and a number of conductive steel wires are connected in parallel between the two limiting steel wires. The same number of photovoltaic components are linearly connected through sealing hoses to form a group, and each group of photovoltaic components is attached to a conductive steel wire, so that the photovoltaic components are evenly distributed to avoid line entanglement caused by the movement of the water surface.

[0014] Preferably, the conductive steel wire is a closed loop belt connected end to end, and the external rotation of the limiting steel wire has multiple groups of guide wheels. The two ends of each group of photovoltaic modules correspond to a guide wheel respectively, and the two ends of the conduction are wrapped around the outside of the guide wheel. The bottom of the floating shell is elastically rotated by a torsion spring with a clip, which clamps the conductive steel wire. A limiting steel wire is located on the shore. The management personnel pull the conductive steel wire to transmit it around the guide wheel, which is used to transport the entire group of photovoltaic modules into the water area or pull it back to the shore. The photovoltaic modules are conveniently connected or disconnected from the conductive steel wire through the elastic rotation of the clip.

[0015] Preferably, the buoy shell also includes a plurality of groups of slots fixed on the outer wall of the cylinder shell, the slots are parallel to the axis of the cylinder shell, and the slots are spaced at the same angle, and buoy bars are inserted in the slots, and the distribution angle of the buoy bars relative to the cylinder shell is less than 180°. The evenly distributed buoy bars enable the buoy shell to float stably on the water surface.

[0016] Compared with the related art, the solar photovoltaic power generation system provided by the present invention has the following beneficial effects:

[0017] 1. The present invention forms a closed cylindrical space through the cylinder shell and the boss, and restricts the rotation of the arc-shaped photovoltaic panel, so that the photovoltaic panel is always at the bottom of the cylinder shell under the action of gravity, ensuring that when the photovoltaic module is shaken by the water surface, the photovoltaic panel always maintains a stable upper surface to receive sunlight, and efficiently generates photovoltaic power;

[0018] 2. The present invention limits the linearly connected photovoltaic modules through rectangularly distributed limiting modules, so that the stable photovoltaic modules float on the water surface for photovoltaic power generation, which greatly saves land space occupation and reduces water evaporation. In addition, the photovoltaic modules directly contact with water and have a higher heat dissipation effect;

[0019] 3. The present invention connects the photovoltaic module with the conductive steel wire through an elastically rotatably installed clip. The operator rotates the conductive steel wire base shell on the shore to evenly drop the photovoltaic module into the water surface or pull it all back from the water surface, which is convenient for construction and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the connection structure between the photovoltaic module and the conductive steel wire of the present invention;

[0022] Figure 3 It is a schematic diagram of the photovoltaic module structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the power connection assembly of the present invention;

[0024] Figure 5 is a schematic cross-sectional view of a photovoltaic panel of the present invention;

[0025] Figure 6 It is a schematic diagram of the installation structure of the floating body strip of the present invention.

[0026] Numbers in the figure: 1. base column; 2. limiting steel wire; 3. floating body shell; 31. cylinder shell; 32. end cover; 33. boss; 34. sealing hose; 35. electrode ring; 4. conductive steel wire; 5. clip; 6. photovoltaic panel; 61. electrode plate; 62. bar seat; 63. screw; 64. electrode contact block; 7. floating body bar; 8. slot; 9. guide wheel. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0029] Embodiment 1

[0030] The construction of the limit assembly is as follows:

[0031] like Figure 1-2As shown, the limiting assembly includes four base columns 1, which are distributed in a rectangular shape, and the bottom of the base column 1 is inserted into the bottom surface of the water area. Two limiting steel wires 2 are pulled in the north-south direction, and the ends of the two limiting steel wires 2 are respectively connected to the corresponding base columns 1, one of which is close to the shore, and the other is located in the water area. The corresponding guide wheels 9 are equidistantly rotated on the surfaces of the two limiting steel wires 2, and the outside of the guide wheel 9 has a fan-shaped protective shell, and the conductive steel wires 4 connected head to tail are closed loops, and both ends of several conductive steel wires 4 are bypassed around the outside of the corresponding guide wheels 9, so that the conductive steel wires 4 can be circulated and conducted;

[0032] The composition of photovoltaic modules is as follows:

[0033] like Figure 3-6 As shown, the floating shell 3 includes a shell 31, which is a cylindrical shell made of transparent PVC material. The shell 31 has a cylindrical cavity inside. An arc-shaped photovoltaic panel 6 is arranged in the cylindrical cavity. The bending angle of the photovoltaic panel 6 is less than 150°. The photovoltaic panel 6 slides and fits with the cylindrical cavity. Electrode plates 61 are fixed at both ends of the photovoltaic panel 6. Two staggered electrode contacts 64 are fixed on the surface of each electrode plate 61. The electrode contacts 64 connect the two circuits of the photovoltaic panel 6. One end of the shell 31 is sealed and the other end has a threaded opening. A boss 33 is fixed inside the sealed end of the shell 31. An end cap 32 is threadedly installed on the threaded opening end of the shell 31. The inner end of the end cap 32 has a reduced diameter portion. The electrical assembly includes an electrode ring 35. Two groups of electrode rings 35 are fixed on the outside of the boss 33 and the reduced diameter part of the end cover 32. The diameter of the electrode ring 35 is smaller than the diameter of the cylindrical cavity. There is a gap between the electrode ring 35 and the inner wall of the cylinder shell 31. The sliding of the electrode plate 61 is limited in the gap. The electrode contact block 64 is in aligning and sliding contact with the outer wall of the electrode ring 35. A sealing hose 34 is fixedly connected between adjacent photovoltaic assemblies. The circuit of the electrode ring 35 passes through the sealing hose 34, so that the circuits of the same group of photovoltaic assemblies are connected in series. A plurality of slots 8 parallel to the axial direction of the cylinder shell 31 are equidistantly arranged on the outside of each cylinder shell 31. Floating body strips 7 are inserted in the slots 8. The distribution angle of the floating body strips 7 relative to the cylinder shell 31 is less than 180°.

[0034] The end cover 32 is threadedly connected to the cylindrical shell 31 to form a closed space inside the cylindrical shell 31 to prevent the photovoltaic panel 6 and the circuit from contacting water. The end cover 32 is opened for installation and maintenance of the photovoltaic panel 6 and the circuit.

[0035] The photovoltaic modules are installed as follows:

[0036] like Figure 1-2As shown, several photovoltaic modules are linearly connected through a sealing hose 34 to form a group. A clip 5 is installed at the bottom of each cylinder shell 31 through a torsion spring rotation. Each group of photovoltaic modules corresponds to a conductive steel wire 4. The conductive steel wire 4 passes through between the clip 5 and the cylinder shell 31, so that the photovoltaic module is fixedly connected to the conductive steel wire 4. The photovoltaic module is floated on the water surface through the floating body bar 7, so that multiple groups of photovoltaic modules laid east-west are formed in the limit module area. The lines at one end of the multiple groups of photovoltaic modules close to the shore are connected to the controller and the power storage and power consumption components set on the shore.

[0037] A limiting steel wire 2 is located on the shore. The management personnel pull the conductive steel wire 4 around the guide wheel 9 to transport the entire set of photovoltaic modules into the water area or pull it back to the shore. The elastic rotation of the clip 5 facilitates the connection or disconnection of the photovoltaic modules with the conductive steel wire 4.

[0038] The power generation works as follows:

[0039] like Figure 3-6 As shown, several groups of photovoltaic modules float in the water surface, and the photovoltaic panel 6 is at the bottom of the cylindrical cavity. The sunlight passes through the cylinder shell 31 and shines on the upper surface of the photovoltaic panel 6 to generate photovoltaic power. The electric energy generated by the photovoltaic panel 6 is transmitted to the power storage and electrical equipment on the shore through the electrode contact block 64 and the electrode ring 35. When the water surface causes the cylinder shell 31 to shake, the photovoltaic panel 6 slides with the cylinder shell 31 under the action of gravity and is always at the bottom position of the cylinder shell 31, maintaining a stable angle of sunlight exposure surface, and the electrode contact block 64 is in sliding contact with the annular electrode ring 35, so that the circuit is always unblocked;

[0040] like Figure 3 , 5 As shown, a bar seat 62 is fixed on the radial side of the photovoltaic panel 6, and multiple screws 63 are equidistantly threadedly installed on the surface of the bar seat 62. The bar seat 62 is located on one side of the photovoltaic panel 6, and the screws 63 on its surface are used to change the center of gravity of the photovoltaic panel 6, so that the photovoltaic panel 6 has a certain deflection angle at the bottom of the cylindrical shell 31 to achieve the best irradiation angle. By increasing or decreasing the number of screws 63, the deflection amount of the photovoltaic panel 6 is changed to adapt to the light in different regions for adjustment;

[0041] like Figure 4 As shown, a cylindrical metal part rotates on the contact surface between the electrode contact block 64 and the electrode ring 35. The rotation axis of the metal part is the same as the axis of the cylinder shell 31. The surface of the cylindrical cavity is coated with a transparent polytetrafluoroethylene layer to reduce the friction between the photovoltaic panel 6 and the electrode ring 35 and the cylinder shell 31, making the rotation more sensitive.

Claims

1. A solar photovoltaic power generation system, comprising a plurality of photovoltaic modules evenly arranged on a water surface, characterized in that: and a limiting assembly for limiting the arrangement position of a photovoltaic assembly, wherein the photovoltaic assembly comprises a floating shell (3) with buoyancy, the floating shell (3) comprising a transparent cylindrical shell (31), the cylindrical shell (31) having a cylindrical cavity, an arc-shaped photovoltaic panel (6) being adapted to slide in the cylindrical cavity, the photovoltaic panel (6) being rotatable along the circumference of the cylindrical cavity, an annular power connection assembly being arranged at both ends of the cylindrical shell (31), electrode plates (61) being fixed at both ends of the photovoltaic panel (6), an electrode contact block (64) being fixed on the surface of the electrode plate (61) for sliding contact with the power connection assembly, and the photovoltaic panel (6) being electrically connected to the power connection assembly via the electrode contact block (64); The power connection assembly comprises an electrode ring (35), the diameter of the electrode ring (35) is smaller than the diameter of the cylindrical cavity, two electrode rings (35) are concentrically arranged at both ends of the cylindrical cavity, a gap is provided between the electrode ring (35) and the inner wall of the cylinder shell (31), the electrode plate (61) is located in the gap, the electrode contact block (64) is in aligning and sliding contact with the electrode ring (35), and a sealing hose (34) is fixedly connected between adjacent photovoltaic assemblies, and a circuit electrically connected to the electrode ring (35) is inserted into the sealing hose (34); A strip seat (62) is fixed to the radial side of the photovoltaic panel (6), and screws (63) are fixed to the surface of the strip seat (62) at equidistant threads; The limiting assembly comprises a rectangularly distributed base column (1), a plurality of photovoltaic modules are evenly arranged within the rectangular range of the base column (1), the plurality of photovoltaic modules are arranged into a plurality of groups, each group of photovoltaic modules is connected to a conductive steel wire (4), the limiting steel wires (2) are connected between the base columns (1) located on the circular end face side of the photovoltaic modules, and the conductive steel wires (4) are connected to the limiting steel wires (2); The conductive steel wire (4) is a closed loop belt connected end to end. The outer rotation of the limit steel wire (2) has multiple groups of guide wheels (9). The two ends of each group of photovoltaic modules correspond to a guide wheel (9). The two ends of the conductive steel wire (4) are wound around the outside of the guide wheel (9). The bottom of the floating shell (3) is elastically rotated by a torsion spring and has a clamp (5). The clamp (5) clamps the conductive steel wire (4).

2. The solar photovoltaic power generation system according to claim 1, characterized in that: The bending angle of the photovoltaic panel (6) is less than 150°.

3. The solar photovoltaic power generation system according to claim 1, characterized in that: One end of the cylindrical shell (31) is sealed and the other end has a threaded opening. A boss (33) is fixed inside the sealed end of the cylindrical shell (31). An end cover (32) is threadedly mounted on the threaded opening end of the cylindrical shell (31). The inner end of the end cover (32) has a reduced diameter portion. The electrode ring (35) is respectively fixed to the outside of the boss (33) and the reduced diameter portion of the end cover (32).

4. The solar photovoltaic power generation system according to claim 1, characterized in that: A cylindrical metal piece is rotatably disposed on the contact surface between the electrode contact block (64) and the electrode ring (35), and a transparent polytetrafluoroethylene layer is coated on the surface of the cylindrical cavity.

5. The solar photovoltaic power generation system according to claim 1, characterized in that: The floating shell (3) further comprises a plurality of groups of slots (8) fixed to the outer wall of the cylindrical shell (31), the slots (8) being axially parallel to the cylindrical shell (31), and the slots (8) being spaced at the same angle, and floating bars (7) being inserted into the slots (8), and the distribution angle of the floating bars (7) relative to the cylindrical shell (31) being less than 180°.

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