A construction method for offshore photovoltaic power station

Abstract

The present invention relates to a construction method of an offshore photovoltaic power station, including: constructing a delivery project of an offshore photovoltaic power station; controlling ships located on both sides of a collector line steel trestle to reciprocate along the length direction of the collector line steel trestle respectively, and when the ship travels to an end position close to the collector line steel trestle, controlling the ship to travel a first distance in a direction away from the collector line steel trestle; during the movement of the ship, controlling the ship to perform a piling operation of a photovoltaic pile foundation on one side close to the collector line steel trestle; hoisting a photovoltaic bracket and a photovoltaic module onto the photovoltaic pile foundation; fixing the photovoltaic bracket to the photovoltaic pile foundation; laying cables for the offshore delivery project, and connecting the photovoltaic module to the grid. The construction method of the offshore photovoltaic power station of the embodiment of the present invention can overcome the defects of poor safety, low operating efficiency and lack of standardized management in the construction process of the existing offshore photovoltaic power station, and has good safety, high efficiency and is convenient for standardized management.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore photovoltaic equipment, and in particular to a construction method of an offshore photovoltaic power station. Background Art

[0002] Offshore photovoltaic power stations are power generation systems that can use the photovoltaic effect of photovoltaic cells to directly convert solar radiation energy into electrical energy. They generally include transformers, inverters, photovoltaic arrays, and related auxiliary facilities.

[0003] Since the marine environment is different from that of inland rivers and lakes, and its environment is more severe, higher requirements are placed on the construction ships and equipment. However, the spacing of the photovoltaic pile foundation used to carry photovoltaic modules is smaller than the width of the existing ship engine (more than 15 meters), which makes the existing pile foundation fixed water surface photovoltaic construction methods generally refer to the water surface photovoltaic construction methods of inland rivers, lakes, and sheltered sea areas, that is, generally using small floating structures and brackets for piling operations. This type of piling equipment has a simple structure, poor safety, and low operating efficiency. It is a temporary facility and lacks standardized management. In the process of assembling photovoltaic brackets and photovoltaic modules, construction workers need to climb to the top of the pile to fix them. Faced with complex marine environments such as waves, the safety of construction workers cannot be guaranteed, which brings great challenges to the standardization, economy, and reliability of engineering construction. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of low operating efficiency, poor safety and poor reliability of the construction method of offshore photovoltaic power station in the prior art, thereby providing a construction method of offshore photovoltaic power station with high operating efficiency, good safety and good reliability.

[0005] In order to solve the above problems, the present invention provides a construction method of an offshore photovoltaic power station, including: constructing a sending project of an offshore photovoltaic power station, the sending project of the offshore photovoltaic power station includes setting up a collector line steel trestle; controlling ships located on both sides of the collector line steel trestle to reciprocate along the length direction of the collector line steel trestle respectively, and when the ship travels to an end position close to the collector line steel trestle, controlling the ship to travel a first distance in a direction away from the collector line steel trestle, the first distance is a preset spacing of a photovoltaic pile foundation, and the photovoltaic pile foundation is used to carry photovoltaic brackets and photovoltaic components of the offshore photovoltaic power station; during the movement of the ship, controlling the ship to perform a piling operation of the photovoltaic pile foundation on a side close to the collector line steel trestle until the piling operation of the photovoltaic pile foundation is completed; hoisting the photovoltaic bracket and the photovoltaic component onto the photovoltaic pile foundation; fixing the photovoltaic bracket to the photovoltaic pile foundation; laying cables for the offshore sending project, and connecting the photovoltaic components to the grid.

[0006] Furthermore, the construction of the offshore photovoltaic power station transmission project includes:

[0007] Construction of pile foundation for the centralized control center;

[0008] Erection of steel trestle for collector lines;

[0009] Platforms are built on both sides of the steel trestle of the collector line, and box-type substations and inverters are installed on the platforms.

[0010] Furthermore, the cables for the offshore transmission project are laid and the photovoltaic modules are connected to the grid, including:

[0011] Each set of photovoltaic brackets is fixedly connected to the photovoltaic pile foundation, the photovoltaic components are communicated with the combiner box, the combiner box is communicated with the DC distribution cabinet, the DC distribution cabinet is communicated with the inverter, the inverter is communicated with the box-type substation, and the box-type substation is communicated with the booster station.

[0012] Furthermore, the photovoltaic bracket and photovoltaic modules are hoisted onto the photovoltaic pile foundation, specifically including:

[0013] Pre-assemble photovoltaic brackets and photovoltaic modules;

[0014] The pre-assembled photovoltaic brackets and photovoltaic modules are hoisted as a whole onto the photovoltaic pile foundation.

[0015] Furthermore, pre-assembling the photovoltaic bracket and the photovoltaic module includes:

[0016] Pre-assemble the photovoltaic brackets and photovoltaic modules in the corresponding areas of the photovoltaic pile foundation.

[0017] Furthermore, the piling operation of the photovoltaic pile foundation and the hoisting operation of the photovoltaic bracket and the photovoltaic module are both carried out by the first ship, and the first ship is provided with at least two pile-driving cranes; or,

[0018] The pile driving operation of the photovoltaic pile foundation is carried out by the first ship, and the lifting operation of the photovoltaic bracket and the photovoltaic module is carried out by the second ship. The second ship is located at the rear side of the first ship and is separated from the first ship by a second distance and has the same travel speed as the first ship. At least two pile driving cranes are arranged on the first ship.

[0019] Furthermore, the construction methods of offshore photovoltaic power stations also include:

[0020] A pile transport ship is used to carry the photovoltaic pile foundation and transfer the photovoltaic pile foundation to the first ship.

[0021] Further, using a pile transport ship to carry the photovoltaic pile foundation and transferring the photovoltaic pile foundation to the first ship specifically includes:

[0022] Controlling the pile transporting vessel to berth at one side of the first vessel;

[0023] A transfer crane is provided on the side of the first ship away from the steel trestle of the collector line, and the transfer crane is controlled to transfer the photovoltaic pile foundation on the pile transport ship to the deck of the first ship.

[0024] Further, the ship is controlled to perform the piling operation of the photovoltaic pile foundation on the side close to the steel trestle of the collector line until the piling operation of the photovoltaic pile foundation is completed, specifically including:

[0025] Use pile positioning frames to control the spacing between adjacent photovoltaic pile foundations;

[0026] The first ship is controlled to drop anchor after traveling a third distance, and the pile-driving crane performs pile-driving operations of the photovoltaic pile foundation on a side close to the steel trestle of the collector line. The length of the third distance is 1-1.5 times the length of the first ship.

[0027] Furthermore, the photovoltaic bracket and the photovoltaic pile foundation are plugged into each other.

[0028] The present invention has the following advantages:

[0029] The construction method of the offshore photovoltaic power station of the embodiment of the present invention first constructs the delivery project of the offshore photovoltaic power station before the pile sinking operation, so that during the pile sinking operation, the cable laying and the photovoltaic module grid connection can be immediately carried out after the installation of each photovoltaic module is completed, thereby greatly improving the construction efficiency of the offshore photovoltaic power station. At the same time, since the ship is controlled to carry out the piling operation of the photovoltaic pile foundation on the side close to the steel trestle of the collector line, even if the width of the ship is greater than the preset spacing of the photovoltaic pile foundation, it can also be used to carry out the piling operation on the photovoltaic pile foundation, allowing standard ship machinery to be used in the construction process of the photovoltaic power station, avoiding the defects of poor safety, low operating efficiency and lack of standardized management caused by the use of small floating structures. Therefore, the construction method of the offshore photovoltaic power station of the embodiment of the present invention can overcome the defects of poor safety, low operating efficiency and lack of standardized management in the construction process of the offshore photovoltaic power station in the prior art, and the construction method of the offshore photovoltaic power station of the embodiment of the present invention has good safety, high efficiency and is convenient for standardized management. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A flow chart showing a construction method of an offshore photovoltaic power station according to an embodiment of the present invention;

[0032] Figure 2 is a schematic diagram of an offshore photovoltaic power station according to an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the construction process of an offshore photovoltaic power station according to an embodiment of the present invention, where a first ship is performing pile sinking construction;

[0034] Figure 4 This is an enlarged view of the platform and the steel trestle of the collector line of the offshore photovoltaic power station according to an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the construction process of an offshore photovoltaic power station according to an embodiment of the present invention, at which the first ship is performing pile sinking construction, and the second ship is hoisting photovoltaic brackets and photovoltaic modules on the photovoltaic pile foundation;

[0036] Figure 6 This is a schematic diagram of the construction process of an offshore photovoltaic power station according to an embodiment of the present invention;

[0037] Figure 7 A first ship used in the construction method of an offshore photovoltaic power station according to an embodiment of the present invention;

[0038] Figure 8 A second ship is used in the construction method of an offshore photovoltaic power station according to an embodiment of the present invention.

[0039] Description of reference numerals:

[0040] 1. Steel trestle for power collection lines; 2. Photovoltaic pile foundation; 3. Centralized control center; 4. Platform; 5. First ship; 51. Pile-driving crane; 52. Transfer crane; 6. Second ship. DETAILED DESCRIPTION

[0041] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] Figure 1 A flow chart showing a construction method of an offshore photovoltaic power station according to an embodiment of the present invention. Figure 2 Schematic diagram of an offshore photovoltaic power station according to an embodiment of the present invention. Figure 3 FIG. 1 is a schematic diagram of the construction process of an offshore photovoltaic power station according to an embodiment of the present invention, wherein the first ship is performing pile sinking construction. Figure 1 , Figure 2 and Figure 3 As shown, the present invention relates to a construction method of an offshore photovoltaic power station, including step S1, step S2, step S3, step S4, step S5 and step S6.

[0046] Step S1 includes: constructing a transmission project of an offshore photovoltaic power station, and the transmission project of the offshore photovoltaic power station includes setting up a steel trestle 1 for a collection line.

[0047] Step S2 includes: controlling the ships located on both sides of the collector line steel trestle 1 to reciprocate along the length direction of the collector line steel trestle 1 respectively, and when the ships travel to the end position close to the collector line steel trestle 1, controlling the ships to travel a first distance away from the collector line steel trestle 1, and the first distance is the preset spacing of the photovoltaic pile foundation 2 (see Figure 6 ), the photovoltaic pile foundation 2 is used to support the photovoltaic brackets and photovoltaic modules of the offshore photovoltaic power station.

[0048] Step S3 includes: during the movement of the ship, controlling the ship to perform the piling operation of the photovoltaic pile foundation 2 on a side close to the collector line steel trestle 1 until the piling operation of the photovoltaic pile foundation 2 is completed.

[0049] Step S4 includes: hoisting the photovoltaic bracket and photovoltaic components onto the photovoltaic pile foundation 2.

[0050] Step S5 includes: fixing the photovoltaic support to the photovoltaic pile foundation 2 .

[0051] Step S6 includes: laying cables for the offshore transmission project and connecting the photovoltaic modules to the grid.

[0052] The construction method of the offshore photovoltaic power station of the embodiment of the present invention first constructs the delivery project of the offshore photovoltaic power station before the pile sinking operation, so that during the pile sinking operation, the cable laying and the photovoltaic module grid connection can be immediately carried out after the installation of each photovoltaic module is completed, thereby greatly improving the construction efficiency of the offshore photovoltaic power station. At the same time, since the ship is controlled to carry out the piling operation of the photovoltaic pile foundation 2 on the side close to the collector line steel trestle 1, even if the width of the ship is greater than the preset spacing of the photovoltaic pile foundation 2, it can also be used to carry out the piling operation on the photovoltaic pile foundation 2, without being constrained by the preset spacing of the pile foundation, allowing standard ship machinery to be used in the construction process of the photovoltaic power station, avoiding the defects of poor safety, low operating efficiency and lack of standardized management caused by the use of small floating structures. Therefore, the construction method of the offshore photovoltaic power station of the embodiment of the present invention can overcome the defects of poor safety, low operating efficiency and lack of standardized management in the construction process of the offshore photovoltaic power station in the prior art, and the construction method of the offshore photovoltaic power station of the embodiment of the present invention has good safety, high efficiency and is convenient for standardized management. Those skilled in the art can select the preset spacing of the photovoltaic pile foundation 2 according to the specific conditions of the offshore photovoltaic power station, so it will not be described in detail here.

[0053] In this embodiment, step S1 mainly includes: step S11, step S12 and step S13.

[0054] in,

[0055] Step S11 mainly includes: constructing the pile foundation of the centralized control center 3 .

[0056] Step S12 mainly includes: erecting a steel trestle bridge 1 for the collector line.

[0057] Step S13 mainly includes: constructing platforms 4 on both sides of the collector line steel trestle 1, and installing box-type substations and inverters on the platforms 4. Figure 4 Among them, the centralized control center 3 is preferably a land-based centralized control center.

[0058] The steel trestle 1 of the power collection line is the foundation of the transmission project and the guarantee of offshore photovoltaic power generation transmission. Prioritizing the construction of the trestle can ensure that the route is unobstructed. After the route is unobstructed, the photovoltaic bracket and photovoltaic components can be constructed and hoisted to connect to the grid for power generation. The photovoltaic pile foundation 2 and platform 4 of the centralized control center 3 are pre-built to ensure that the cable laying and grid-connected power generation operations can be carried out immediately after the pile sinking construction is completed.

[0059] In this embodiment, step S6 mainly includes:

[0060] Each set of photovoltaic brackets is fixedly connected to the photovoltaic pile foundation 2, the photovoltaic components are communicated with the junction box, the junction box is communicated with the DC distribution cabinet, the DC distribution cabinet is communicated with the inverter, the inverter is communicated with the box-type substation, and the box-type substation is communicated with the booster station.

[0061] Step S4 may optionally include: first hoisting the photovoltaic support onto the photovoltaic pile foundation 2, and then installing the photovoltaic module on the photovoltaic support. The photovoltaic module preferably includes, but is not limited to, a photovoltaic panel. Preferably, in this embodiment, step S4 specifically includes step S41 and step S42.

[0062] Step S41: pre-assembling the photovoltaic bracket and the photovoltaic module;

[0063] Step S42: hoist the pre-assembled photovoltaic brackets and photovoltaic components onto the photovoltaic pile foundation 2. Pre-assembling the photovoltaic brackets and photovoltaic components preferably includes, but is not limited to, assembling the photovoltaic brackets, assembling the photovoltaic components, and installing the photovoltaic components on the photovoltaic brackets. By pre-assembling the photovoltaic brackets and photovoltaic components, the steps of assembling the photovoltaic brackets and photovoltaic components can be carried out simultaneously with the delivery project or pile sinking operation of the offshore photovoltaic power station, so that when the pile sinking operation of each photovoltaic pile foundation 2 is completed, the photovoltaic brackets and photovoltaic components can be immediately hoisted on the photovoltaic pile foundation 2, which greatly improves the construction efficiency of the offshore photovoltaic power station, and the operation of pre-assembling the photovoltaic brackets and photovoltaic components can be carried out at the dock or the ship's engine deck, avoiding the operation of pre-assembling the photovoltaic brackets and photovoltaic components from being affected by the offshore environment. Preferably, in this embodiment, step S41 mainly includes: pre-assembling the photovoltaic brackets and photovoltaic components in the corresponding area of ​​the photovoltaic pile foundation 2.

[0064] In this embodiment, the piling operation of the photovoltaic pile foundation 2 and the hoisting operation of the photovoltaic bracket and the photovoltaic module are both performed by the first ship 5, and at least two pile-drilling cranes 51 are arranged on the first ship 5. At least two pile-drilling cranes 51 perform pile-drilling operations simultaneously, which can improve the pile-drilling efficiency of the pile-drilling operation. Figure 7 As shown, three pile-driving cranes 51 are arranged on each first vessel 5 .

[0065] like Figure 5 As shown, the piling operation of the photovoltaic pile foundation 2 is implemented by the first ship 5, and the hoisting operation of the photovoltaic bracket and the photovoltaic module is implemented by the second ship 6. The second ship 6 is located at the rear side of the first ship 5, and is separated from the first ship 5 by a second distance, and has the same driving speed as the first ship 5. At least two pile sinking cranes 51 are arranged on the first ship 5. The speed of the first ship 5 for pile foundation construction matches the speed of the second ship 6 for hoisting, and the time taken to complete the same area of ​​engineering is kept consistent, and the assembly line operation is carried out before and after. It is ensured that the construction of the photovoltaic pile foundation 2 of a certain number of bracket units is completed, and the overall hoisting of the same number of photovoltaic brackets and photovoltaic modules can be completed in the same time later. The second distance can be selected according to the model of the first ship 5, the second ship 6 and the crane. The minimum value of the second distance can ensure that there is no risk of rear-end collision between the first ship 5 and the second ship 6, and there will be no interference between the cranes.

[0066] The first vessel 5 can be configured to carry a certain number of photovoltaic pile foundations 2 and sink the piles.

[0067] Step S4 also includes step S411.

[0068] Step S411 mainly includes: using a pile transport ship to carry the photovoltaic pile foundation 2, and transferring the photovoltaic pile foundation 2 to the first ship 5.

[0069] In this embodiment, step S411 mainly includes step S4111 and step S4112.

[0070] Step S4111: Control the pile transporting ship to berth at one side of the first ship 5.

[0071] Step S4112: A transfer crane 52 is provided on the side of the first ship 5 away from the collector line steel trestle 1, and the transfer crane 52 is controlled to transfer the photovoltaic pile foundation 2 on the pile transport ship to the deck of the first ship 5. Preferably, when the weather is good and the marine environment is relatively stable, it is preferred to use a pile transport ship to transfer the photovoltaic pile foundation 2 from the dock to the first ship 5. When the weather is bad, it is preferred to allow the first ship 5 to carry the photovoltaic pile foundation 2 itself and perform pile sinking construction. The number of transfer cranes 52 is preferably at least two, which can increase the number of photovoltaic pile foundations 2 transferred to the first ship 5. For example, in this embodiment, Figure 8 As shown, each first ship 5 is provided with two transfer cranes.

[0072] Preferably, in this embodiment, step S3 specifically includes step S31 and step S32.

[0073] Step S31 mainly includes: using a pile positioning frame to control the distance between adjacent photovoltaic pile foundations 2, which can ensure that the photovoltaic foundations 2 are evenly distributed, and the space on both sides of the collector line steel trestle 1 is fully utilized, which helps to improve the power generation efficiency of the offshore photovoltaic power station.

[0074] Step S32 mainly includes: controlling the first ship 5 to drop anchor after traveling the third distance, and the pile sinking crane 51 performs a pile sinking operation of the photovoltaic pile foundation 2 on a side close to the collector line steel trestle 1, and the length of the third distance is 1-1.5 times the length of the first ship 5. When the length of the third distance is set to 1-1.5 times the length of the first ship 5, it can be ensured that the crane on the first ship 5 performs the pile sinking operation evenly, and the pile sinking efficiency is relatively high.

[0075] In this embodiment, the photovoltaic bracket and the photovoltaic pile foundation 2 are preferably but not limited to being mutually welded, plugged or threaded, etc. Preferably, in this embodiment, the photovoltaic bracket and the photovoltaic pile foundation 2 are mutually plugged, which can improve the connection efficiency between the photovoltaic bracket and the photovoltaic pile foundation 2, and the photovoltaic bracket can be unhooked after the lifting is completed.

[0076] To sum up, the construction method of the offshore photovoltaic power station in the embodiment of the present invention can overcome the defects of the offshore photovoltaic power station in the prior art, such as poor safety in the construction process, low operating efficiency and lack of standardized management. The construction method of the offshore photovoltaic power station in the embodiment of the present invention has good safety, high efficiency and is easy to be managed in a standardized manner.

[0077] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A construction method for an offshore photovoltaic power station, characterized in that: include: Constructing a transmission project of an offshore photovoltaic power station, wherein the transmission project of the offshore photovoltaic power station comprises setting up a steel trestle for a collection line (1); Controlling ships located on both sides of the collector line steel trestle (1) to reciprocate along the length direction of the collector line steel trestle (1), and when the ships travel to an end position close to the collector line steel trestle (1), controlling the ships to travel a first distance in a direction away from the collector line steel trestle (1), wherein the first distance is a preset spacing of a photovoltaic pile foundation (2), and the photovoltaic pile foundation (2) is used to carry photovoltaic brackets and photovoltaic modules of the offshore photovoltaic power station; During the movement of the ship, the ship is controlled to perform a piling operation of the photovoltaic pile foundation (2) on a side close to the collector line steel trestle (1) until the piling operation of the photovoltaic pile foundation (2) is completed; Hoisting the photovoltaic bracket and the photovoltaic assembly onto the photovoltaic pile foundation (2); The photovoltaic support is fixedly connected to the photovoltaic pile foundation (2); Laying cables for offshore transmission projects and connecting the photovoltaic modules to the grid; The construction of the offshore photovoltaic power station transmission project includes: Construction of pile foundation for the centralized control center (3); Erection of steel trestle for collector lines (1); Building platforms (4) on both sides of the collector line steel trestle (1), and installing a box-type substation and an inverter on the platforms (4); The laying of cables for the offshore transmission project and connecting the photovoltaic modules to the grid specifically include: Each group of the photovoltaic brackets is fixedly connected to the photovoltaic pile foundation (2), the photovoltaic components are communicatively connected to the combiner box, the combiner box is communicatively connected to the DC power distribution cabinet, the DC power distribution cabinet is communicatively connected to the inverter, the inverter is communicatively connected to the box-type substation, and the box-type substation is communicatively connected to the booster station.

2. The construction method of the offshore photovoltaic power station according to claim 1 is characterized in that: The photovoltaic support and photovoltaic assembly are hoisted onto the photovoltaic pile foundation (2), specifically comprising: Pre-assembling the photovoltaic bracket and the photovoltaic assembly; The pre-assembled photovoltaic bracket and photovoltaic assembly are hoisted as a whole onto the photovoltaic pile foundation (2).

3. The construction method of the offshore photovoltaic power station according to claim 2 is characterized in that: Pre-assembling the photovoltaic support and the photovoltaic assembly includes: The photovoltaic brackets and photovoltaic components in the corresponding area of ​​the photovoltaic pile foundation (2) are preassembled.

4. The construction method of the offshore photovoltaic power station according to any one of claims 1 to 3, characterized in that: The piling operation of the photovoltaic pile foundation (2) and the hoisting operation of the photovoltaic bracket and the photovoltaic module are both performed by a first ship (5), and the first ship (5) is provided with at least two piling cranes (51); or, The piling operation of the photovoltaic pile foundation (2) is carried out by a first ship (5), and the lifting operation of the photovoltaic bracket and the photovoltaic module is carried out by a second ship (6). The second ship (6) is located at the rear side of the first ship (5) and is separated from the first ship (5) by a second distance and has the same travel speed as the first ship (5). The first ship (5) is provided with at least two pile-driving cranes (51).

5. The construction method of the offshore photovoltaic power station according to claim 4 is characterized in that: Also includes: A pile transport ship is used to carry the photovoltaic pile foundation (2), and the photovoltaic pile foundation (2) is transferred to the first ship (5).

6. The construction method of the offshore photovoltaic power station according to claim 5 is characterized in that: The method of using a pile transport ship to carry the photovoltaic pile foundation (2) and transferring the photovoltaic pile foundation (2) to the first ship (5) specifically includes: Controlling the pile transporting vessel to berth at one side of the first vessel (5); A transfer crane (52) is provided on a side of the first ship (5) away from the collector line steel trestle (1), and the transfer crane (52) is controlled to transfer the photovoltaic pile foundation on the pile transport ship to the deck of the first ship (5).

7. The construction method of the offshore photovoltaic power station according to claim 6, characterized in that: The controlling the ship to perform a piling operation of the photovoltaic pile foundation (2) on a side close to the collector line steel trestle (1) until the piling operation of the photovoltaic pile foundation (2) is completed specifically includes: Using a pile positioning frame to control the spacing between adjacent photovoltaic pile foundations (2); The first ship (5) is controlled to drop anchor after traveling a third distance, and the pile sinking crane (51) performs a pile sinking operation of the photovoltaic pile foundation (2) on a side close to the collector line steel trestle (1), wherein the length of the third distance is 1-1.5 times the length of the first ship (5).

8. The construction method of an offshore photovoltaic power station according to any one of claims 1 to 3, characterized in that: The photovoltaic support and the photovoltaic pile foundation (2) are plugged into each other.

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