CN217125087U - Floating type semi-submersible platform for offshore photovoltaic power station - Google Patents

Abstract

The utility model discloses a float marine photovoltaic power plant semi-submerged formula platform of formula. The solar energy power generation system comprises a photovoltaic module array, a truss structure and a floating body foundation, wherein the photovoltaic module array is used for converting solar energy into electric energy and connecting electric power to a power grid through a power transmission line, the photovoltaic module array is installed on the truss structure through a support, and the floating body foundation is fixed at the bottom of the truss structure and is suspended in the sea to be connected with a mooring system. The utility model discloses the waterline face area and the wave load that have greatly reduced the photovoltaic array body are favorable to promoting the basic structural security of body, and intensity is high, and buoyancy is high, and the stability is good, and is few with the steel volume, can resist more abominable marine environment.

Description

A floating offshore photovoltaic power station semi-submersible platform

technical field

The utility model belongs to the technical field of offshore photovoltaic power generation, in particular to a semi-submersible platform of a floating offshore photovoltaic power station.

Background technique

At present, the proportion of new energy is increasing. Photovoltaic power plants have the advantages of zero pollution and zero emissions, and are one of the most rapidly developing new energy sources in recent years. The existing surface photovoltaics are arranged in inland lakes, rivers, reservoirs, fish ponds and other reservoirs, using fixed pile foundations or Floating base. Since many inland waters are within the ecological red line designated by the state or the surface water source of drinking water, some waters have functions of navigation and flood control, which limits the development of surface photovoltaics.

The waters are vast and unrestricted, and it is close to the coastal cities with large electricity demand. The deployment of photovoltaic power stations in the ocean can greatly promote the development of the solar energy industry. Compared with the inland environment, the marine environment is more severe in wind, waves, currents and other environments, and there are also problems such as corrosion and marine life adhesion. The existing fixed surface photovoltaics have a greater impact on the seabed topography, and the construction is complicated, which is not suitable for It is used in the marine environment, and floating photovoltaics on the sea are a more feasible solution.

The high-density polyethylene floating boxes and floating tubes used in the existing floating photovoltaics on the water surface are developed for inland waters and mainly bear wind loads, but the wave loads in the marine environment are more important and corrosive, and the existing floating photovoltaic floating bodies cannot. To meet the operational requirements of photovoltaic power plants, it is easy to cause equipment damage. Therefore, it is necessary to develop a low-cost floating platform that meets the requirements for the use of photovoltaic power plants in the marine environment.

Utility model content

The purpose of the present utility model is to provide a floating offshore photovoltaic power station semi-submersible platform in order to solve the shortcomings of the above-mentioned background technology. Solve the characteristics that the floating photovoltaic power station on the sea is subjected to harsh wind, wave and current conditions, and the existing surface photovoltaic floating body is not suitable for the marine environment.

The technical scheme adopted by the utility model is: a floating offshore photovoltaic power station semi-submersible platform, comprising a photovoltaic component array, a truss structure and a floating body foundation, the photovoltaic component array is used to convert solar energy into electrical energy, and the electrical Connected to the power grid, the photovoltaic module array is mounted on the truss structure through a bracket, and the floating body foundation is fixed at the bottom of the truss structure and suspended in the sea to be connected to the mooring system.

In a further preferred structure, the truss structure includes a horizontal truss and a connecting truss, the horizontal truss is concentrically arranged in a plurality of regular polygons of different sizes, and the connecting truss passes through the center of the regular polygon and is connected to the adjacent sides of the horizontal truss At the corner point, it is connected with the horizontal truss to form a whole.

In a further preferred structure, the truss structure includes upper and lower chords, vertical rods and inclined rods, the upper and lower chords, vertical rods and inclined rods form a plurality of triangular support structures, and the truss structure is overall higher than the still water surface.

In a further preferred structure, the floating body foundation includes a plurality of floating body units, the floating body units are evenly distributed around the truss structure, the upper part of the floating body unit is rigidly fixed to the truss structure, and the lower part is suspended in the sea and connected to the mooring system.

In a further preferred structure, the floating body unit includes an upper column and a lower column, the diameter of the lower column is larger than the diameter of the upper column, and the height of the lower column is smaller than the height of the upper column.

In a further preferred structure, a plurality of independent cabins are arranged inside the upper column and the lower column.

In a further preferred structure, the truss structure is welded by steel.

In a further preferred structure, the floating body unit is made of steel plates.

The truss structure is sized to meet the required area of the entire single photovoltaic array.

The installation of the photovoltaic module array on the truss structure may adopt a rigid support or a flexible support.

The floating body foundation provides buoyancy for the truss structure and the photovoltaic module array, so that the electrical equipment on the semi-submersible platform is always in a state above the water surface and is not attacked by sea water.

Compared with the existing water surface floating photovoltaic floating body structure, the utility model arranges one floating body platform in one photovoltaic module array, which greatly reduces the water plane area and wave load of the photovoltaic array floating body, and is beneficial to improve the floating body foundation. structural safety. The buoyancy of an array is concentrated on a plurality of floating body units, effectively avoiding the waste of floating body materials and reducing construction costs. Multiple floating body units are evenly distributed and connected by truss structure, so that the overall structure of the semi-submersible platform has high strength, high buoyancy, good stability, less steel consumption, and can resist more severe marine environment.

The beneficial effects obtained by the utility model are as follows:

1. The semi-submersible platform of the entire floating offshore photovoltaic power station has a large structure. One floating body foundation can accommodate an array of photovoltaic modules. The truss structure forms each part into a whole. Compared with the existing scheme of one photovoltaic module corresponding to one floating body, it is extremely Greatly reduces the workload of floating body installation and construction.

2. The floating body units are evenly distributed around, with a long interval, which provides a better recovery force for the semi-submersible platform and enhances the stability of the platform; In the form of a column, the contact ratio of the water surface is small, and the water plane surface of the platform is small, so the wave load received will be less than the existing scheme, which is beneficial to the safety of the structure.

3. The floating body unit is also arranged in the center of the truss structure, which can provide favorable support for the truss structure and avoid excessive deformation and wave bending moment at the center of the truss structure due to the excessive span length, which is beneficial to the entire semi-submersible Type platform resists stronger waves.

4. The weight of a single photovoltaic module array is supported by the floating body unit, which can effectively provide buoyancy, reduce the amount of steel used for the floating body foundation, and effectively reduce the construction cost of offshore photovoltaic power stations.

5. The diameter of the lower column of the floating body unit is large, which can provide more viscous damping for the whole system and reduce the movement range of the entire semi-submersible platform when resonance occurs. The diameter of the upper column is small, which can reduce the water of the semi-submersible platform. Line and surface area, while reducing wave loads and improving structural safety.

Description of drawings

Figure 1 is a schematic structural diagram of a floating offshore photovoltaic power station;

Figure 2 is a schematic structural diagram of a semi-submersible platform;

Figure 3 is a schematic structural diagram of a truss structure;

Figure 4 is a schematic diagram of a floating body infrastructure;

FIG. 5 is a schematic diagram of the structure of the floating body unit.

In the picture: 1- photovoltaic module array, 2-truss structure, 3-floating body foundation, 21-horizontal truss, 22-connecting truss, 31-floating body unit, 311-upper column, 312-lower column.

Detailed ways

The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, so as to facilitate a clear understanding of the present utility model, but they do not constitute a limitation on the present utility model.

As shown in FIG. 1 and FIG. 2 , the utility model is a semi-submersible platform of a floating offshore photovoltaic power station, comprising a wind turbine, a photovoltaic component array 1 , a truss structure 2 , and a floating body foundation 3 . A photovoltaic module array 1 is arranged on the upper part of the platform, and the photovoltaic modules convert solar energy into electric energy, and connect the electric power to the grid through transmission lines. The truss structure 2 provides a support structure for the laying of the photovoltaic module array 1 . Floating body foundation 3 provides buoyancy for the entire photovoltaic power station. When the platform is subjected to wind, wave and current loads, it ensures that the photovoltaic power station is always suspended above the water surface for normal operation. Each floating offshore photovoltaic power station semi-submersible platform can be equipped with photovoltaic modules ranging from 1MW to 4MW. According to the location of the photovoltaic power station, the photovoltaic modules can be adjusted to the corresponding optimal inclination angle to maintain the maximum power generation. The inclined support structure of the photovoltaic module is installed on the truss structure 2, and a rigid support made of steel or a flexible support made of stainless steel wire rope can be used.

As shown in FIG. 3 , the structural form of the truss structure 3 is three regular octagons with different side lengths, including a horizontal truss 21 and a connecting truss 22 . The horizontal truss 21 is arranged on the side of the octagon, and the connecting truss 22 connects the corner points of the adjacent sides of the horizontal truss 21 to connect the three octagons into a whole. Because the side length of the octagon is long, the truss structure 3 has a certain height, and vertical rods and inclined rods are installed between the upper and lower chords to increase the bending moment resistance of the overall structure and prevent the truss structure 3 from being affected by the photovoltaic array. produce deformation.

As shown in FIG. 4 and FIG. 5 , the floating body foundation 3 is composed of a plurality of floating body units 31 , and the floating body unit 31 includes an upper column 311 and a lower column 312 . The upper column 311 has a relatively high height, the top is rigidly fixed to the truss structure 2 , and is higher than the water surface, and the bottom is rigidly fixed to the lower column 312 . The lower column 312 is completely submerged in water, and the diameter is larger than that of the upper column 311, but the height is lower. The small diameter of the upper column 311 makes the waterplane area of the entire semi-submersible platform smaller, which can effectively reduce the wave load of the platform. Because the wave load is the largest near the water surface, the larger diameter of the lower column 312 can provide buoyancy and viscous damping, and at the same time, the distance from the water surface can reduce the force of the wave and improve the safety of the structure. The floating body units 31 are symmetrically distributed on each corner of the truss structure 2, which can provide better restoring force for the semi-submersible platform and enhance the stability of the platform. The center of the octagon is the place where the deformation of the truss structure is the largest. Placing a floating body unit 31 at this position can effectively offset the deformation of the truss structure 2 under the action of the gravity of the photovoltaic module array 1, and provide a strong support point to avoid the truss structure 2. Damaged due to excessive deformation.

Contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims (6)

1. The utility model provides a float marine photovoltaic power plant semi-submerged formula platform of formula which characterized in that: the floating body type solar energy power generation system comprises a photovoltaic module array (1), a truss structure (2) and a floating body foundation (3), wherein the photovoltaic module array (1) is used for converting solar energy into electric energy and connecting the electric energy to a power grid through a power transmission line, the photovoltaic module array (1) is installed on the truss structure (2) through a support, and the floating body foundation (3) is fixed at the bottom of the truss structure (2) and is suspended in the sea to be connected with a mooring system;

the truss structure (2) comprises a horizontal truss (21) and a connecting truss (22), the horizontal truss (21) is concentrically arranged in a plurality of regular polygons with different sizes, and the connecting truss (22) passes through the center of each regular polygon and is connected to the corner points of the adjacent edges of the horizontal truss (21) to be connected with the horizontal truss (21) to form a whole;

the floating body foundation (3) comprises a plurality of floating body units (31), the floating body units (31) are uniformly distributed around the truss structure (2), the upper parts of the floating body units (31) are rigidly fixed with the truss structure (2), and the lower parts of the floating body units are suspended in the sea and connected with a mooring system;

a buoyant body unit (31) is arranged at the center of the truss structure (2).

2. The floating offshore photovoltaic power plant semi-submersible platform of claim 1, further comprising: the truss structure (2) comprises an upper chord, a lower chord, a vertical rod and an inclined rod, the upper chord, the lower chord, the vertical rod and the inclined rod form a plurality of triangular supporting structures, and the truss structure (2) is integrally higher than a still water surface.

3. The floating offshore photovoltaic power plant semi-submersible platform of claim 1, further comprising: the floating body unit (31) comprises an upper upright post (311) and a lower upright post (312), the diameter of the lower upright post (312) is larger than that of the upper upright post (311), and the height of the lower upright post (312) is smaller than that of the upper upright post (311).

4. The floating offshore photovoltaic power plant semi-submersible platform of claim 3, wherein: a plurality of independent cabins are arranged inside the upper upright column (311) and the lower upright column (312).

5. The floating offshore photovoltaic power plant semi-submersible platform of claim 1, further comprising: the truss structure (2) is formed by welding steel.

6. The floating offshore photovoltaic power plant semi-submersible platform of claim 1, further comprising: the floating body unit (31) is made of a steel plate.

Images