Wave dissipation device and method for offshore photovoltaic power station and photovoltaic power station system

Abstract

The invention belongs to the technical field of photovoltaic power stations, and provides a wave dissipation device and method for an offshore photovoltaic power station and a photovoltaic power station system. The wave dissipation device comprises wave dissipation grating plates arranged at the two ends of a preset area of the offshore photovoltaic power station system in the direction from the shore side to the deep sea; the wave dissipation grating plate comprises a plurality of connecting columns which form a box body structure and are arranged in parallel. A spiral plate is arranged on each connecting column, and wave dissipation holes are formed in the spiral plates; by means of the multiple connecting columns arranged in parallel in the box body structure, sea waves can be eliminated, the height of waves entering the photovoltaic power station area can be reduced, the height of the lowest point of an internal assembly of the photovoltaic power station area is allowed to be reduced, an independent wave dissipating device does not need to be arranged on each photovoltaic foundation pile, and cost is reduced; each connecting column is provided with a spiral plate, wave dissipation holes are formed in the spiral plates, and after the spiral plates disperse water flow in sea waves, the waves are dissipated through the wave dissipation holes, so that the wave dissipation effect is further guaranteed, and the wave height is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of photovoltaic power stations, and in particular relates to a wave eliminating device and method for an offshore photovoltaic power station, and a photovoltaic power station system. Background Art

[0002] In recent years, as land resources have become increasingly scarce, photovoltaics have moved from land to sea, and offshore photovoltaics have developed rapidly. In the development of offshore photovoltaics, the following two problems have been encountered: First, the lowest point of the component is relatively high. The lowest point of offshore photovoltaic components is generally much higher than the sea level, resulting in longer pile foundations. In addition, the number of offshore photovoltaic pile foundations is very large, resulting in higher project costs; second, the utilization rate of the sea area is low.

[0003] The main factor affecting the height of the lowest point of the component and the utilization rate of the sea area is that the wave height entering the photovoltaic system area is relatively high. If the lowest point is too low, the waves will affect components such as photovoltaic panels, and the wave height is relatively high. At present, in order to reduce the impact of waves on photovoltaics, an independent wave-breaking device is generally set for each photovoltaic pile, which is costly and cannot solve the wave height in the entire area. Summary of the invention

[0004] In order to solve the above-mentioned problems, the present invention proposes a wave-breaking device, method and photovoltaic power station system for an offshore photovoltaic power station. Through a plurality of parallel connecting columns arranged in a box structure, the waves can be eliminated and the wave height entering the photovoltaic power station area can be reduced, thereby allowing the lowest point height of the components inside the photovoltaic power station area to be lowered. There is no need to set an independent wave-breaking device on each photovoltaic foundation pile, thereby reducing the cost; a spiral plate is provided on each connecting column, and a wave-breaking hole is opened on the spiral plate. After the spiral plate disperses the water flow in the waves, the waves are eliminated through the wave-breaking holes, thereby further ensuring the wave-breaking effect and reducing the wave height.

[0005] In order to achieve the above-mentioned purpose, in a first aspect, the present invention provides a wave eliminating device for an offshore photovoltaic power station, which adopts the following technical solution:

[0006] A wave-breaking device for an offshore photovoltaic power station, comprising wave-breaking grid plates respectively arranged at both ends of a preset area of ​​an offshore photovoltaic power station system in a direction from the coast to the deep sea;

[0007] The wave-breaking grille plate comprises a box structure and a plurality of parallel connecting columns; each connecting column is provided with a spiral plate, and the spiral plate is provided with wave-breaking holes.

[0008] Furthermore, at both ends of the preset area of ​​the offshore photovoltaic power station system, wave-breaking frame cross bars and wave-breaking frame longitudinal bars are respectively arranged on two rows of adjacent pipe piles; a plurality of mutually parallel connecting columns are arranged between adjacent wave-breaking frame cross bars and between adjacent wave-breaking frame longitudinal bars.

[0009] Furthermore, at both ends of the preset area of ​​the offshore photovoltaic power station system, the lowest point heights of the photovoltaic components used to set the wave-breaking frame cross bars and the wave-breaking frame longitudinal bars are higher than the lowest point heights of other photovoltaic components in the preset area.

[0010] Furthermore, at both ends of the preset area of ​​the offshore photovoltaic power station system, respectively above and below the average sea level, two rows of connecting columns are arranged through wave-breaking frame cross bars; and wave-breaking grid plate edge sealing ribs are obliquely arranged between the two rows of connecting columns.

[0011] Furthermore, a plurality of spiral plates are arranged at intervals on the connecting column; and the spiral plates on adjacent connecting columns are staggered.

[0012] Furthermore, on the connecting column, the rotation directions of two adjacent spiral plates are opposite.

[0013] Furthermore, two rows of wave-breaking holes are evenly arranged on the spiral plate along the spiral direction.

[0014] Furthermore, pile-fixed photovoltaic modules are arranged at both ends of the preset area, and wave-breaking grid plates are arranged on the pile-fixed photovoltaic modules at both ends; inside the preset area, a staggered structural distribution form of pile-fixed photovoltaic modules and floating photovoltaic modules is arranged.

[0015] In order to achieve the above-mentioned purpose, in a second aspect, the present invention also provides a wave elimination method for an offshore photovoltaic power station, which adopts the following technical solution:

[0016] A wave-breaking method for an offshore photovoltaic power station uses the wave-breaking device for an offshore photovoltaic power station as described in the first aspect, comprising: eliminating sea waves through a plurality of parallel connecting columns in a box structure to reduce the wave height entering the photovoltaic power station area; each connecting column is provided with a spiral plate, and wave-breaking holes are opened on the spiral plate. After the spiral plate disperses the water flow in the sea waves, the waves are eliminated through the wave-breaking holes.

[0017] In order to achieve the above-mentioned purpose, in a third aspect, the present invention further provides a photovoltaic power station system, which adopts the following technical solution:

[0018] A photovoltaic power station system uses the wave-breaking device for an offshore photovoltaic power station as described in the first aspect.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the present invention, wave-breaking grating plates are respectively arranged at both ends of the preset area of ​​the offshore photovoltaic power station system from the shore to the deep sea; wherein the wave-breaking grating plates include a box structure and a plurality of parallel connecting columns; a spiral plate is arranged on each connecting column, and a wave-breaking hole is opened on the spiral plate; through the plurality of parallel connecting columns in the box structure, the waves can be eliminated, and the wave height entering the photovoltaic power station area can be reduced, thereby allowing the lowest point height of the components inside the photovoltaic power station area to be reduced, and there is no need to set an independent wave-breaking device on each photovoltaic pile, thereby reducing the cost; a spiral plate is arranged on each connecting column, and a wave-breaking hole is opened on the spiral plate. After the spiral plate disperses the water flow in the waves, the waves are eliminated through the wave-breaking holes, which further ensures the wave-breaking effect and reduces the wave height.

[0021] 2. In the present invention, at both ends of the preset area of ​​the offshore photovoltaic power station system, wave-breaking frame cross bars and wave-breaking frame longitudinal bars are respectively arranged on two rows of adjacent pipe piles; between adjacent wave-breaking frame cross bars and between adjacent wave-breaking frame longitudinal bars, a plurality of mutually parallel connecting columns are arranged. The lowest point height of the photovoltaic components used to set the wave-breaking frame cross bars and wave-breaking frame longitudinal bars at both ends of the preset area of ​​the offshore photovoltaic power station system is higher than the lowest point height of other photovoltaic components in the preset area; under the premise that waves do not affect the photovoltaic panels, the lowest point height of most photovoltaic components is reduced; the lowest point height of the photovoltaic components at the end of the area is higher than the lowest point height of other areas, and its purpose is also to avoid the impact of waves on photovoltaic panels. On this basis, wave-breaking frame cross bars and wave-breaking frame longitudinal bars are arranged on two rows of adjacent pipe piles in the photovoltaic components at the end of the area, as well as a plurality of mutually parallel connecting columns, which reinforce the pile foundation and avoid the destructive effect of waves on the pile foundation.

[0022] 3. In the present invention, two rows of connecting columns are arranged at both ends of the preset area of ​​the offshore photovoltaic power station system, respectively above and below the average sea level, through the cross bars of the wave-breaking frame, and the wave-breaking effect is improved by performing wave-breaking inside and outside the sea water respectively.

[0023] 4. In the present invention, a plurality of spiral plates are arranged at intervals on the connecting column; the spiral plates on adjacent connecting columns are staggered; the spiral plates are arranged at intervals on the connecting column, which reduces the cost compared with arranging spiral plates on the entire connecting column. Moreover, on the basis of reducing the cost, the staggered distribution of the spiral plates on adjacent connecting columns not only does not reduce the wave-breaking effect, but on the contrary, the dispersion degree of the water flow is improved by locally dispersing the water flow, thereby improving the wave-breaking effect.

[0024] 5. In the present invention, the rotation directions of two adjacent spiral plates on the connecting column are opposite, which further improves the dispersion ability of water flow and improves the wave-breaking effect.

[0025] 6. In the present invention, two rows of wave-breaking holes are evenly arranged on the spiral plate along the spiral direction. After the water flow in the waves passes through the two rows of wave-breaking holes, the direction of the split water flow is disrupted and then collides with each other, thereby improving the efficiency.

[0026] 7. In the present invention, pile-based fixed photovoltaic modules are arranged at both ends of the preset area, and wave-breaking grid plates are arranged on the pile-based fixed photovoltaic modules at both ends, thereby ensuring the wave-proof effect within the preset area; on this basis, inside the preset area, a staggered structural distribution form of pile-based fixed photovoltaic modules and floating photovoltaic modules is arranged, thereby improving the utilization rate of the area within the region. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings in the specification that constitute a part of this embodiment are used to provide a further understanding of this embodiment. The schematic embodiments of this embodiment and their descriptions are used to explain this embodiment and do not constitute improper limitations on this embodiment.

[0028] Figure 1 It is a side view of the wave eliminating device of Example 1 of the present invention;

[0029] Figure 2 A top view of a wave-breaking device according to Embodiment 1 of the present invention;

[0030] Figure 3 It is a front view of the wave eliminating device of Example 1 of the present invention;

[0031] Figure 4 This is a schematic diagram of a wave elimination hole in Example 1 of the present invention;

[0032] Figure 5 This is a schematic diagram of the spiral plate distribution of Example 1 of the present invention;

[0033] Among them, 1. pipe piles; 2. photovoltaic panels; 3. wave-breaking frame cross bars; 4. wave-breaking frame longitudinal bars; 5. wave-breaking grating edge ribs; 6. floating body; 7. mooring cable; 8. wave-breaking grating; 801. connecting column; 802. spiral plate; 803. wave-breaking hole. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0036] Embodiment 1:

[0037] In recent years, as land resources have become increasingly scarce, photovoltaic power generation has moved from land to sea, and offshore photovoltaic power generation has developed rapidly. In the development of offshore photovoltaic power generation, the following two problems are mainly encountered: First, the lowest point of the module is high. The elevation of the module mainly considers the influence of extreme water surge, waves and safety air gap. According to the standard formula The elevation of the lowest point of the component can be calculated, where H w For extremely high water level, H b is the maximum wave height at extremely high water levels, Δ is the height of the safe air gap, therefore, the lowest point of offshore photovoltaic modules is generally much higher than the sea level, resulting in longer pile foundations, and the number of offshore photovoltaic pile foundations is very large, resulting in higher project costs; secondly, the utilization rate of sea area is low. Currently, offshore photovoltaics are mainly divided into fixed pile foundation type and floating type, but both have disadvantages. The number of fixed pile foundations is huge, and the utilization rate of sea area is low. The floating type is only suitable for sea areas with wave heights less than 1m.

[0038] As recorded in the background technology, the main factor affecting the height of the lowest point of the component and the utilization rate of the sea area is that the wave height entering the photovoltaic system area is relatively large. If the lowest point is too low, the waves will affect components such as photovoltaic panels, and the wave height is relatively large. At present, in order to reduce the impact of waves on photovoltaics, an independent wave-breaking device is generally set for each photovoltaic pile, which is costly and cannot solve the wave height in the entire area.

[0039] Based on this, Figure 1 , Figure 2 and Figure 3 As shown, this embodiment provides a wave-breaking device for an offshore photovoltaic power station, including pipe piles 1, photovoltaic panels 2, wave-breaking frame cross bars 3, wave-breaking frame longitudinal bars 4, wave-breaking grid plate edge sealing ribs 5, floating bodies 6, mooring cables 7 and wave-breaking grid plates 8.

[0040] Optionally, multiple rows of pile-based fixed photovoltaic modules are arranged in a preset area; Figure 2 and Figure 3 As shown, the two ends of the preset area are provided with pile-based fixed photovoltaic modules, and wave-breaking grid plates 8 are provided on the pile-based fixed photovoltaic modules at the two ends; inside the preset area, a staggered structural distribution form of pile-based fixed photovoltaic modules and floating photovoltaic modules is provided. The floating photovoltaic module is provided through the floating body 6, and a mooring cable 7 is provided between the floating body 6 and the pipe pile 1.

[0041] like Figure 4As shown, the wave-breaking grid plate 8 includes a connecting column 801, a spiral plate 802 arranged on the connecting column 801, and a wave-breaking hole 803 opened on the spiral plate 802. Optionally, the wave-breaking grid plate 8 is respectively arranged at both ends of the preset area of ​​the offshore photovoltaic power station system along the shore to the deep sea direction; the wave-breaking grid plate 8 includes a box structure and a plurality of parallel connecting columns 801; each connecting column 801 is provided with a spiral plate 802, and the spiral plate 802 is provided with a wave-breaking hole 803.

[0042] Specifically, pile-based fixed photovoltaic modules are arranged at both ends of the preset area, and wave-breaking grid plates 8 are arranged on the pile-based fixed photovoltaic modules at both ends, thereby ensuring the wave-proof effect in the preset area; on this basis, a staggered structural distribution form of pile-based fixed photovoltaic modules and floating photovoltaic modules is arranged inside the preset area, thereby improving the utilization rate of the area in the area. The lowest point height of the photovoltaic modules used to set the wave-breaking frame cross bars 3 and the wave-breaking frame longitudinal bars 4 at both ends of the preset area of ​​the offshore photovoltaic power station system is higher than the lowest point height of other photovoltaic modules in the preset area.

[0043] By means of multiple parallel connecting columns 801 in the box structure, the waves can be eliminated and the wave height entering the photovoltaic power station area can be reduced, thereby allowing the lowest point height of the components inside the photovoltaic power station area to be lowered. There is no need to set up an independent wave-breaking device on each photovoltaic pile, thereby reducing the cost; each connecting column 801 is provided with a spiral plate 802, and the spiral plate 802 is provided with a wave-breaking hole 803. After the spiral plate 802 disperses the water flow in the waves, the waves are eliminated through the wave-breaking hole 803, thereby further ensuring the wave-breaking effect and reducing the wave height.

[0044] At both ends of the preset area of ​​the offshore photovoltaic power station system, wave-breaking frame cross bars 3 and wave-breaking frame longitudinal bars 4 are respectively arranged on two rows of adjacent pipe piles 1; a plurality of mutually parallel connecting columns 801 are arranged between adjacent wave-breaking frame cross bars 3 and between adjacent wave-breaking frame longitudinal bars 4.

[0045] Specifically, at both ends of the preset area of ​​the offshore photovoltaic power station system, wave-breaking frame cross bars 3 and wave-breaking frame longitudinal bars 4 are respectively set on two rows of adjacent pipe piles; between adjacent wave-breaking frame cross bars 3 and adjacent wave-breaking frame longitudinal bars 4, multiple parallel connecting columns 801 are set. At both ends of the preset area of ​​the offshore photovoltaic power station system, the lowest point height of the photovoltaic components for setting the wave-breaking frame cross bars 3 and wave-breaking frame longitudinal bars 4 is higher than the lowest point height of other photovoltaic components in the preset area; on the premise that the waves do not affect the photovoltaic panels, the lowest point height of most photovoltaic components is reduced; the lowest point height of the photovoltaic components at the end of the area is higher than the lowest point height of other areas, and its purpose is also to avoid the impact of waves on photovoltaic panels. On this basis, wave-breaking frame cross bars 3 and wave-breaking frame longitudinal bars 4 are set on two rows of adjacent pipe piles in the photovoltaic components at the end of the area, as well as multiple parallel connecting columns 801, which reinforce the pile foundation and avoid the destructive effect of waves on the pile foundation.

[0046] At both ends of the preset area of ​​the offshore photovoltaic power station system, respectively above and below the average sea level, two rows of connecting columns 801 are arranged through the wave-breaking frame crossbar 3; wave-breaking grid plate edge sealing ribs 5 are obliquely arranged between the two rows of connecting columns 801. Specifically, at both ends of the preset area of ​​the offshore photovoltaic power station system, respectively above and below the average sea level, two rows of connecting columns 801 are arranged through the wave-breaking frame crossbar, and wave breaking is performed inside and outside the seawater, respectively, thereby improving the wave breaking effect.

[0047] Optional, such as Figure 5 As shown, a plurality of spiral plates 802 are arranged at intervals on the connecting column 801; the spiral plates 802 on adjacent connecting columns 801 are staggered. Specifically, the spiral plates 802 are arranged at intervals on the connecting column, which reduces the cost compared with the spiral plates 802 being arranged on the entire connecting column 801. On the basis of reducing the cost, the staggered arrangement of the spiral plates 802 on adjacent connecting columns 801 not only does not reduce the wave-breaking effect, but on the contrary, the dispersion degree of the water flow is improved by locally dispersing the water flow, thereby improving the wave-breaking effect.

[0048] Optionally, the rotation directions of two adjacent spiral plates 802 on the connecting column 801 are opposite; two rows of wave-breaking holes 803 are evenly arranged along the spiral direction on the spiral plate 802. Specifically, the rotation directions of two adjacent spiral plates 802 on the connecting column 801 are opposite, which further improves the dispersion ability of water flow and improves the wave-breaking effect; two rows of wave-breaking holes 803 are evenly arranged along the spiral direction on the spiral plate 802, and after the water flow in the waves passes through the two rows of wave-breaking holes 803, the direction of the split water flow is disrupted and then collides with each other, thereby improving the efficiency effect.

[0049] Embodiment 2:

[0050] The present embodiment provides a wave-breaking method for an offshore photovoltaic power station, using the wave-breaking device for an offshore photovoltaic power station as described in Example 1, including: eliminating the waves through a plurality of parallel connecting columns 801 in a box structure to reduce the wave height entering the photovoltaic power station area; each connecting column 801 is provided with a spiral plate 802, and the spiral plate 802 is provided with a wave-breaking hole 803, and after the spiral plate 802 disperses the water flow in the waves, the waves are eliminated through the wave-breaking hole 803.

[0051] Embodiment 3:

[0052] This embodiment provides a photovoltaic power station system, which uses the wave-breaking device for an offshore photovoltaic power station as described in Embodiment 1.

[0053] The above description is only a preferred embodiment of the present embodiment and is not intended to limit the present embodiment. For those skilled in the art, the present embodiment may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiment shall be included in the protection scope of the present embodiment.

Claims

1. A wave eliminating device for an offshore photovoltaic power station, characterized in that: It includes wave-breaking grid plates respectively arranged at both ends of the preset area of ​​the offshore photovoltaic power station system from the coast to the deep sea; The wave-breaking grille plate comprises a box structure and a plurality of parallel connecting columns; each connecting column is provided with a spiral plate, and the spiral plate is provided with wave-breaking holes.

2. A wave eliminating device for an offshore photovoltaic power station as claimed in claim 1, characterized in that: At both ends of the preset area of ​​the offshore photovoltaic power station system, wave-breaking frame cross bars and wave-breaking frame longitudinal bars are respectively arranged on two rows of adjacent pipe piles; a plurality of mutually parallel connecting columns are arranged between adjacent wave-breaking frame cross bars and between adjacent wave-breaking frame longitudinal bars.

3. A wave eliminating device for an offshore photovoltaic power station as claimed in claim 2, characterized in that: At both ends of the preset area of ​​the offshore photovoltaic power station system, the lowest point height of the photovoltaic components used to set the wave-breaking frame cross bars and wave-breaking frame longitudinal bars is higher than the lowest point height of other photovoltaic components in the preset area.

4. A wave eliminating device for an offshore photovoltaic power station as claimed in claim 3, characterized in that: At both ends of the preset area of ​​the offshore photovoltaic power station system, respectively above and below the mean sea level, two rows of connecting columns are arranged through the wave-breaking frame cross bars; wave-breaking grid plate edge sealing ribs are obliquely arranged between the two rows of connecting columns.

5. A wave eliminating device for an offshore photovoltaic power station as claimed in claim 1, characterized in that: A plurality of spiral plates are arranged at intervals on the connecting column; and the spiral plates on adjacent connecting columns are arranged in a staggered manner.

6. A wave eliminating device for an offshore photovoltaic power station as claimed in claim 5, characterized in that: On the connecting column, the rotation directions of two adjacent spiral plates are opposite.

7. A wave eliminating device for an offshore photovoltaic power station as claimed in claim 1, characterized in that: The spiral plate has two rows of wave-eliminating holes evenly arranged along the spiral direction.

8. A wave eliminating device for an offshore photovoltaic power station as claimed in claim 1, characterized in that: Pile-fixed photovoltaic modules are arranged at both ends of the preset area, and wave-breaking grid plates are arranged on the pile-fixed photovoltaic modules at both ends; inside the preset area, a staggered structural distribution form of pile-fixed photovoltaic modules and floating photovoltaic modules is arranged.

9. A wave elimination method for an offshore photovoltaic power station, characterized in that: A wave-breaking device for an offshore photovoltaic power station as described in any one of claims 1 to 8 is used, comprising: eliminating waves through a plurality of parallel connecting columns in a box structure to reduce the wave height entering the photovoltaic power station area; each connecting column is provided with a spiral plate, and a wave-breaking hole is opened on the spiral plate. After the spiral plate disperses the water flow in the waves, the waves are eliminated through the wave-breaking holes.

10. A photovoltaic power station system, characterized in that: A wave-breaking device for an offshore photovoltaic power station as described in any one of claims 1 to 8 is used.

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