Flexible wind-wave resistant floating photovoltaic system and operating method

Abstract

Disclosed in the present invention is a flexible wind-wave resistant floating photovoltaic system, comprising a photovoltaic platform framework. A photovoltaic power generation platform is arranged on the upper side of the photovoltaic platform framework, a central float is coaxially arranged below the photovoltaic platform framework, and the central float is fixedly connected to the photovoltaic platform framework by means of a float support. A plurality of arc-shaped orientation adjustment bodies are arranged around the central float in a circular array, two ends of each arc-shaped orientation adjustment body in the length direction are respectively connected to rotating shafts which are coaxial with each other, and each arc-shaped orientation adjustment body can rotate around the axis of the rotating shafts at the two ends thereof. A solar tracking function is realized while wind-wave resistance is achieved.

Description

A flexible, wave-resistant floating photovoltaic system and its working method Technical Field

[0001] This invention belongs to the field of water surface photovoltaics. Background Technology

[0002] At sea, the wind and waves are strong, so floating photovoltaic systems must have good wind and wave resistance to ensure stable operation and long-term safety. By adopting a comprehensive design that includes a ring-shaped anti-wind and wave floating body, customized photovoltaic power generation components and anchoring system, the impact of waves on floating photovoltaic equipment can be effectively reduced and the stability of the system can be improved. However, this design usually results in the photovoltaic platform being in a horizontal position at all times, unable to change its attitude, and thus unable to track the sun, thereby affecting the power generation efficiency. Technical issues

[0003] In order to overcome the shortcomings of the existing technology, the present invention provides a flexible wind and wave resistant floating photovoltaic system and working method, which has the function of tracking light on the basis of wind and wave resistance. Technical solutions

[0004] To achieve the above objectives, the present invention provides a flexible wind and wave resistant floating photovoltaic system, including a photovoltaic platform frame, a photovoltaic power generation platform on the upper side of the photovoltaic platform frame, and a central float coaxially arranged below the photovoltaic platform frame. The central float is fixedly connected to the photovoltaic platform frame through a float bracket.

[0005] Around the central float, there are several arc-shaped attitude adjustment bodies arranged in a circular array. Each arc-shaped attitude adjustment body has two ends connected to a rotating shaft that is coaxial with each other along its length. The arc-shaped attitude adjustment body can rotate around the axis of its two rotating shafts.

[0006] Furthermore, several combined bearing seats are distributed in a circular array along the lower edge of the photovoltaic platform frame. The upper end of each bearing combined seat is fixedly supported and connected to the photovoltaic platform frame by a structural rod. Between any two adjacent bearing combined seats, there is an arc-shaped attitude adjustment body. The rotating shafts at both ends of each arc-shaped attitude adjustment body are rotatably mounted on the corresponding bearing combined seat through waterproof bearings.

[0007] Furthermore, the inner arc profile of the arc-shaped attitude adjuster intersects with the extension line of the axis of rotation and forms a bowstring-shaped profile.

[0008] Furthermore, each arc-shaped attitude adjustment body has a ring-shaped rope drive wheel fitted around its middle section. The inner ring of the ring-shaped rope drive wheel is supported and connected to the arc-shaped attitude adjustment body by a support rod. The ring-shaped rope drive wheel is coaxial with the rotation axis at both ends of the arc-shaped attitude adjustment body. The drive device can drive each ring-shaped rope drive wheel to rotate along the axis.

[0009] Furthermore, the several arc-shaped attitude adjustment bodies include several arc-shaped floats and several arc-shaped counterweights. The several arc-shaped floats and several arc-shaped counterweights are arranged in an alternating circular array, so that there is an arc-shaped counterweight between any two adjacent arc-shaped floats, and there is an arc-shaped float between any two adjacent arc-shaped counterweights. In the initial state, the convex side of the arc-shaped counterweights faces downwards, and the convex side of the arc-shaped floats faces upwards.

[0010] Furthermore, in the initial state, all the arc-shaped counterweights and the central float are completely submerged below the liquid surface; the upper half of each arc-shaped float floats above the water surface, while the lower half is submerged in the water.

[0011] Furthermore, there are three arc-shaped floats and three arc-shaped counterweights. In the initial state, when viewed from above or below, the three arc-shaped floats and three arc-shaped counterweights are connected end to end in an alternating hexagonal shape.

[0012] Furthermore, each annular rope drive wheel has an annular rope groove on its outer ring, and each annular rope drive wheel has a corresponding drive rope. The drive rope is wound taut around the annular rope groove of the corresponding annular rope drive wheel at least two times, and both ends of the drive rope are led upward along the tangent direction of the annular rope groove. The upper ends of the two straight drive ropes led upward along the tangent direction of the annular rope groove are respectively connected to the rope index output ends of winch a and winch b. The winding and unwinding actions of winch a and winch b can drive the drive rope to move linearly, thereby driving the annular rope drive wheel to rotate. Each winch a and winch b is fixed on the photovoltaic platform frame.

[0013] Furthermore, a working method for a flexible, wave-resistant floating photovoltaic system:

[0014] Anti-wind and wave mode:

[0015] Starting from the initial state, actively control the first, second, and third arc-shaped counterweights and floats to rotate along their respective axes; causing the convex sides of the first, second, and third arc-shaped floats to face away from the center of the device; and causing the convex sides of the first, second, and third arc-shaped counterweights to face closer to the device. The center area is on one side; thus, the centers of mass of the first, second, and third arc-shaped floats, which are arranged in a circular array, are further away from the center area of ​​the device; the centers of mass of the first, second, and third arc-shaped counterweights are closer to the center area of ​​the device; at this time, the first, second, third, and third arc-shaped counterweights are all at the same height. Beneficial effects

[0016] In the present invention, under wind and wave conditions, the first arc-shaped counterweight, the first arc-shaped float, the second arc-shaped counterweight, the second arc-shaped float, the third arc-shaped counterweight, and the third arc-shaped float are all at the same height. This not only reduces the impact area of ​​the transverse waves and alleviates the impact intensity of the transverse waves, but also, the centers of mass of the first, second, and third arc-shaped floats are further away from the central area of ​​the device. With the cooperation of the chain mooring line, this improves the device's ability to resist the capsizing of the longitudinal waves, while also reducing the burden on the chain mooring line. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the overall structure of this device;

[0018] Figure 2 is a schematic diagram of the upward view from Figure 1;

[0019] Figure 3 is a horizontal view of Figure 1;

[0020] Figure 4 is a schematic diagram of Figure 1 with the photovoltaic platform frame and photovoltaic power generation platform hidden;

[0021] Figure 5 is a bottom view of the device in its initial state;

[0022] Figure 6 is a bottom view of the device under wind-resistant conditions;

[0023] Figure 7 is an enlarged schematic diagram of the arc-shaped float of this device;

[0024] Figure 8 is an enlarged schematic diagram of the arc-shaped counterweight of this device. Embodiments of the present invention

[0025] The invention will now be further described with reference to the accompanying drawings.

[0026] As shown in Figures 1 to 8, a flexible, wave-resistant floating photovoltaic system includes a photovoltaic platform frame 3, a photovoltaic power generation platform 1 on the upper side of the photovoltaic platform frame 3, and a catenary mooring line 2 connected to the periphery of the photovoltaic power generation platform 1. The catenary mooring line 2 provides flexible restraint for the device, preventing it from drifting away. It is in a non-taut state, and the influence of the catenary mooring line 2 on the overall attitude of the device can be ignored when the wind and waves are calm. A disc-shaped central float 5 is coaxially arranged directly below the photovoltaic platform frame 3. The central float 5 is fixedly connected to the photovoltaic platform frame 3 through a float bracket 6. Several arc-shaped attitude adjustment bodies 4 are distributed in a circular array around the central float 5. Each arc-shaped attitude adjustment body 4 has two ends connected to coaxial rotating shafts 14 along its length. The arc-shaped attitude adjustment body 4 can rotate around the axis of its two ends rotating shafts 14.

[0027] Several combined bearing seats 7 are arranged in a circular array along the lower edge of the photovoltaic platform frame 3. The upper end of each combined bearing seat 7 is fixedly supported and connected to the photovoltaic platform frame 3 by a structural rod 8. There is an arc-shaped attitude adjustment body 4 between any two adjacent combined bearing seats 7. The rotating shafts 14 at both ends of each arc-shaped attitude adjustment body 4 are rotatably mounted on the corresponding combined bearing seat 7 through waterproof bearings.

[0028] Each arc-shaped attitude adjustment body 4 has a ring-shaped rope drive wheel 13 fitted around its middle section. The inner ring of the ring-shaped rope drive wheel 13 is supported and connected to the arc-shaped attitude adjustment body 4 by a support rod 16. The ring-shaped rope drive wheel 13 is coaxial with the rotating shafts 14 at both ends of the arc-shaped attitude adjustment body 4. The driving device can drive each ring-shaped rope drive wheel 13 to rotate along the axis.

[0029] Each annular rope drive wheel 13 has an annular rope groove 74 on its outer ring. Each annular rope drive wheel 13 has a corresponding drive rope 11. The drive rope 11 is wound taut around the annular rope groove 74 of the corresponding annular rope drive wheel 13 at least two turns. Both ends of the drive rope 11 are led upward along the tangent direction of the annular rope groove 74. The upper ends of the two straight drive ropes 11 led upward along the tangent direction of the annular rope groove 74 are respectively connected to the rope index output end of winch a 9 and the rope index output end of winch b 10. The winding and unwinding actions of winch a 9 and winch b 10 can drive the drive rope 11 to move linearly, thereby driving the annular rope drive wheel 13 to rotate. Each winch a 9 and winch b 10 is fixed on the photovoltaic platform frame 3.

[0030] Several arc-shaped attitude adjustment bodies 4 include several arc-shaped floats 4a and several arc-shaped counterweights 4b. The arc-shaped floats 4a and several arc-shaped counterweights 4b are arranged in an alternating circular array, such that there is an arc-shaped counterweight 4b between any two adjacent arc-shaped floats 4a and an arc-shaped float 4a between any two adjacent arc-shaped counterweights 4b. In the initial state, the convex side of the arc of each arc-shaped counterweight 4b faces downwards, and the convex side of the arc of each arc-shaped float 4a faces upwards.

[0031] As shown in Figures 7 and 8, the inner arc contour 41 of the arc-shaped attitude adjustment body 4 intersects with the extension line 13 of the axis of the rotating shaft 14 and forms a bowstring-shaped contour 51.

[0032] The arc-shaped float 4a has a density less than that of seawater and is a hollow metal shell. The arc-shaped counterweight 4b has a density greater than that of seawater. In the initial state, each arc-shaped counterweight 4b and the central float 5 are completely submerged below the liquid surface 17. The upper half of each arc-shaped float 4a floats above the water surface, and the lower half is submerged in the water.

[0033] As shown in Figures 5 and 6, there are three arc-shaped floats 4a and three arc-shaped counterweights 4b. In the initial state, from a top-down or bottom-up perspective, the three arc-shaped floats 4a and the three arc-shaped counterweights 4b are connected end to end in an alternating hexagonal shape, with the six sides of the hexagon corresponding to the six directions.

[0034] Working principle: For ease of understanding, as shown in Figures 5 and 6, the six arc-shaped attitude adjustment bodies 4 are numbered as follows: In the upward view, the three arc-shaped floats 4a are respectively labeled as arc-shaped float 4.1a, arc-shaped float 4.2a, and arc-shaped float 4.3a in the clockwise direction; the three arc-shaped counterweights 4b are respectively labeled as arc-shaped counterweight 4.1b, arc-shaped counterweight 4.2b, and arc-shaped counterweight 4.3b in the clockwise direction; the outer periphery of the disc-shaped central float 5 includes arc-shaped counterweight 4.1b, arc-shaped float 4.1a, arc-shaped counterweight 4.2b, arc-shaped float 4.2a, arc-shaped counterweight 4.3b, and arc-shaped float 4.3a in the clockwise direction.

[0035] Spotlight in calm waters:

[0036] When the sun is positioned on the side of the photovoltaic power generation platform 1 closest to the first arc-shaped float 4.1a, based on the initial state, by controlling the first arc-shaped counterweight 4.1b and the second arc-shaped counterweight 4.2b to rotate 180° along the axis of their respective two ends of the rotating shaft 14, the convex sides of the arc-shaped counterweights 4.1b and 4.2b, which were originally facing downwards, will now face upwards, causing the convex sides of the first arc-shaped counterweights 4.1b and 4.2b, which were originally completely submerged in water, to be exposed above the water surface, thereby reducing the overall drainage volume of the device facing the sun. At the same time, the second and third arc-shaped floats 4.2a and 4.3a are actively driven to rotate 180° along the axis of their respective two ends of the rotating shaft 14. The convex sides of the arc-shaped floats 4.2a and 4.3a, which were originally facing upwards, now face downwards, so that the convex sides of the second and third arc-shaped floats 4.2a and 4.3a, which were originally exposed above the water surface, are now submerged in the water. This increases the drainage volume of the device on the side away from the sun. Consequently, the originally horizontal photovoltaic power generation platform 1 tilts towards the sun, increasing the light intensity received by the photovoltaic power generation platform 1.

[0037] Similarly, the following operation method can be used when the sun is positioned on the photovoltaic power generation platform 1 near the side of the second arc-shaped float 4.2a or the third arc-shaped float 4.3a.

[0038] When the sun is positioned on the side of the photovoltaic power generation platform 1 closest to the first arc-shaped counterweight 4.1b, based on the initial state, by controlling winch 9 (a) and winch 10 (b) corresponding to the first arc-shaped counterweight 4.1b, the first arc-shaped counterweight 4.1b is actively driven to rotate 180° along the axis of the rotating shaft 14 at both ends. The convex side of the first arc-shaped counterweight 4.1b, which was originally facing downwards, now faces upwards, causing the convex side of the first arc-shaped counterweight 4.1b, which was originally completely submerged in water, to emerge from the water surface, thereby reducing... This increases the drainage volume of the device on the side facing the sun. At the same time, the second arc-shaped float 4.2a is actively driven to rotate 180° along the axis of the rotating shaft 14 at both ends. The convex side of the second arc-shaped float 4.2a, which was originally facing upward, now faces downward, so that the convex side of the second arc-shaped float 4.2a changes from being exposed above the water surface to being submerged underwater, thereby increasing the drainage volume of the device on the side away from the sun. This, in turn, causes the originally horizontal photovoltaic power generation platform 1 to tilt towards the sun, increasing the light intensity received by the photovoltaic power generation platform 1.

[0039] Similarly, the following operation method can be used when the sun is positioned on the side of the photovoltaic power generation platform 1 that is close to the second arc-shaped counterweight 4.2b or the third arc-shaped counterweight 4.3b.

[0040] Anti-wind and wave mode:

[0041] Based on the initial state, the first arc-shaped counterweight 4.1b, the first arc-shaped float 4.1a, the second arc-shaped counterweight 4.2b, the second arc-shaped float 4.2a, the third arc-shaped counterweight 4.3b, and the third arc-shaped float 4.3a are actively controlled by winches a 9 and b 10 to rotate along their respective pivots 14 at both ends; causing the first arc-shaped float 4.1a, the second arc-shaped float 4.2a, and the third arc-shaped float 4.3a to rotate along their respective pivots 14 at both ends. The convex sides of the arc-shaped floats 4.3a all face away from the central region of the entire device; the convex sides of the arc-shaped counterweights 4.1b, 4.2b, and 4.3b all face closer to the central region of the entire device, as shown in Figure 6; thus, the arc-shaped floats 4.1a, 4.2a, and 4.3b are arranged in a circular array. The centers of mass of the three circular weights 4.1b, 4.2b, and 4.3b are all further away from the central area of ​​the device; the centers of mass of the three circular weights 4.1b, 4.2b, and 4.3b are closer to the central area of ​​the device. At this time, the three circular weights 4.1b, 4.1a, 4.2b, 4.2a, 4.3b, and 4.3a are all at the same height. This not only reduces the impact area of ​​the transverse waves and alleviates the impact intensity of the transverse waves, but also, with the centers of mass of the three circular weights 4.1a, 4.2a, and 4.3a further away from the central area of ​​the device, the device's ability to resist capsizing by longitudinal waves is improved with the help of the chain mooring line 2, while also reducing the burden on the chain mooring line 2.

[0042] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A flexible, wave-resistant, floating photovoltaic system, characterized in that: The photovoltaic platform frame (3) is provided with a photovoltaic power generation platform (1) on the upper side of the photovoltaic platform frame (3) and a central float (5) is coaxially arranged below the photovoltaic platform frame (3). The central float (5) is fixedly connected to the photovoltaic platform frame (3) through a float bracket (6). The central float (5) is surrounded by a number of arc-shaped attitude adjustment bodies (4) arranged in a circular array. Each arc-shaped attitude adjustment body (4) has two ends connected to a rotating shaft (14) that is coaxial with each other in the length direction. The arc-shaped attitude adjustment body (4) can rotate around the axis of the rotating shaft (14) at its two ends.

2. The flexible, wave-resistant floating photovoltaic system according to claim 1, characterized in that: The photovoltaic platform frame (3) has several combined bearing seats (7) arranged in a circular array below it. The upper end of each of the bearing combined seats (7) is fixedly supported and connected to the photovoltaic platform frame (3) by a structural rod (8). There is an arc-shaped attitude adjustment body (4) between any two adjacent bearing combined seats (7). The rotating shafts (14) at both ends of each arc-shaped attitude adjustment body (4) are rotatably installed on the corresponding bearing combined seat (7) through waterproof bearings.

3. The flexible, wave-resistant floating photovoltaic system according to claim 1, characterized in that: The inner arc profile (41) of the arc-shaped attitude adjustment body (4) intersects with the extension line (13) of the axis of rotation (14) and forms a bowstring-shaped (51) profile.

4. The flexible, wave-resistant floating photovoltaic system according to claim 3, characterized in that: Each arc-shaped attitude adjustment body (4) has a ring-shaped rope drive wheel (13) fitted around its middle section. The inner ring of the ring-shaped rope drive wheel (13) is supported and connected to the arc-shaped attitude adjustment body (4) by a support rod (16). The ring-shaped rope drive wheel (13) is coaxial with the rotating shaft (14) at both ends of the arc-shaped attitude adjustment body (4). The driving device can drive each ring-shaped rope drive wheel (13) to rotate along the axis.

5. A flexible, wave-resistant, floating photovoltaic system according to claim 4, characterized in that: Several arc-shaped attitude adjustment bodies (4) include several arc-shaped floats (4a) and several arc-shaped counterweights (4b). The several arc-shaped floats (4a) and several arc-shaped counterweights (4b) are arranged in an alternating circular array, so that there is an arc-shaped counterweight (4b) between any two adjacent arc-shaped floats (4a) and an arc-shaped float (4a) between any two adjacent arc-shaped counterweights (4b). In the initial state, the arc-shaped convex side of each arc-shaped counterweight (4b) faces downward, and the arc-shaped convex side of each arc-shaped float (4a) faces upward.

6. A flexible, wave-resistant, floating photovoltaic system according to claim 5, characterized in that: In the initial state, each arc-shaped counterweight (4b) and the central float (5) are completely submerged below the liquid surface (17); the upper half of each arc-shaped float (4a) floats above the water surface, and the lower half is submerged in the water.

7. A flexible, wave-resistant, floating photovoltaic system according to claim 2, characterized in that: There are three arc-shaped floats (4a) and three arc-shaped counterweights (4b) in total. In the initial state, when viewed from above or below, the three arc-shaped floats (4a) and the three arc-shaped counterweights (4b) are connected end to end in an alternating hexagonal shape.

8. A flexible, wave-resistant, floating photovoltaic system according to claim 4, characterized in that: Each annular rope drive wheel (13) has an annular rope groove (74) around its outer ring. Each annular rope drive wheel (13) has a corresponding drive rope (11). The drive rope (11) is wound taut around the annular rope groove (74) of the corresponding annular rope drive wheel (13) at least two turns. Both ends of the drive rope (11) are led upward along the tangent direction of the annular rope groove (74). The upper ends of the two straight drive ropes (11) led upward along the tangent direction of the annular rope groove (74) are respectively connected to the rope index output end of winch a (9) and the rope index output end of winch b (10). The winding and unwinding actions of winch a (9) and winch b (10) can drive the drive rope (11) to move in a line, thereby driving the annular rope drive wheel (13) to rotate. Each winch a (9) and winch b (10) is fixed on the photovoltaic platform frame (3).

9. The working method of a flexible, wave-resistant floating photovoltaic system according to claim 7, characterized in that: Anti-wind and wave mode: Based on the initial state, actively control the first arc-shaped counterweight (4.1b), the first arc-shaped float (4.1a), the second arc-shaped counterweight (4.2b), the second arc-shaped float (4.2a), the third arc-shaped counterweight (4.3b), and the third arc-shaped float (4.3a) to rotate along their respective pivots (14); causing the convex sides of the first arc-shaped float (4.1a), the second arc-shaped float (4.2a), and the third arc-shaped float (4.3a) to face away from the central area of ​​the entire device; and causing the convex sides of the first arc-shaped counterweight (4.1b), the second arc-shaped counterweight (4.2b), and the third arc-shaped counterweight (4.3b) to face closer to the device. The center of gravity of the first arc-shaped float (4.1a), the second arc-shaped float (4.2a), and the third arc-shaped float (4.3a), which are arranged in a circular array, is further away from the center of gravity of the device; the center of gravity of the first arc-shaped counterweight (4.1b), the second arc-shaped counterweight (4.2b), and the third arc-shaped counterweight (4.3b) is closer to the center of gravity of the device; at this time, the first arc-shaped counterweight (4.1b), the first arc-shaped float (4.1a), the second arc-shaped counterweight (4.2b), the second arc-shaped float (4.2a), the third arc-shaped counterweight (4.3b), and the third arc-shaped float (4.3a) are all at the same height.

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