Distributed Modular Offshore Substation

Abstract

The present invention provides a distributed modular offshore substation, including a foundation, a bearing platform is provided on the top of the foundation, and a main transformer module, a GIS module, a power distribution device module and a secondary equipment module are provided on the bearing platform; the high voltage side of the main transformer module is connected to the GIS module through a cable, and the low voltage side of the main transformer module is connected to the power distribution device module through a cable, and the main transformer module, the GIS module and the power distribution device module are also connected to the secondary equipment module through cables respectively. The present invention arranges the main transformer module, the GIS module, the power distribution device module and the secondary equipment module on the platform of the wind turbine foundation, which is close to the wind turbine, and multiple 35kV submarine cable collection line groups are collected nearby to the present invention for unified transmission after voltage boosting, which can greatly reduce the investment in submarine cables; the distributed modular offshore substation and the wind turbine share the same foundation, saving foundation investment; the distributed modular offshore substation is divided into four modules, which are small in size, light in weight, and easy to install and operate.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power generation, and in particular to a distributed modular offshore substation. Background Art

[0002] In order to promote the development of my country's offshore wind power industry and realize the grid parity of offshore wind power as soon as possible, large-scale development of offshore wind power is one of the effective ways. On December 29, 2016, the National Energy Administration and the State Oceanic Administration jointly issued the "Regulations on the Management of Offshore Wind Power Development and Construction" Notice, in which Article 13 of Chapter 3 clearly stated that "offshore wind power projects are encouraged to be developed and constructed in a large-scale manner". The concentrated and large-scale development of offshore wind power is the core content of optimizing the energy structure, promoting energy transformation and upgrading, and an important way to cope with climate change. It is also a new engine to boost the rapid development of the local economy.

[0003] At present, the capacity of a single offshore wind farm built in my country generally does not exceed 400MW. With the concentrated and large-scale development of million-kilowatt offshore wind farms, the traditional development plan requires the establishment of multiple offshore substations and the transmission of power through submarine cables with more loops, resulting in high investment in submarine cables and offshore substations, which is not conducive to meeting the requirements for offshore wind power evaluation and grid connection. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a distributed modular offshore substation to overcome the above-mentioned defects of the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides a distributed modular offshore substation, comprising a foundation, the bottom of which extends into the seabed, a bearing platform is provided on the top of the foundation, and a main transformer module, a GIS module, a distribution device module and a secondary equipment module are provided on the bearing platform; the high-voltage side of the main transformer module is connected to the GIS module through a cable, the low-voltage side of the main transformer module is connected to the distribution device module through a cable, and the main transformer module, GIS module and distribution device module are also connected to the secondary equipment module through cables respectively.

[0006] Preferably, a wind turbine tower is provided on the bearing platform, and the main transformer module, GIS module, power distribution device module and secondary equipment module are arranged around the wind turbine tower.

[0007] Preferably, the main transformer module includes a transformer body located inside the box-type structure and a radiator located outside the box-type structure, and the transformer body and the radiator are connected.

[0008] Preferably, the main transformer module, GIS module, power distribution device module and secondary equipment module are respectively connected to the bearing platform by bolts.

[0009] Preferably, the high voltage side of the main transformer module is connected to the GIS module through a 110 kV cable, and the low voltage side of the main transformer module is connected to the power distribution device module 5 through a 35 kV cable.

[0010] Preferably, the GIS module includes a GIS body and a control cabinet located in a box-type structure.

[0011] Preferably, the power distribution device module includes an inflatable cabinet and a grounding resistance set located in a box structure.

[0012] Preferably, the secondary equipment module includes a secondary protection screen, a measurement control screen, and a power supply screen located in the box structure.

[0013] As described above, the distributed modular offshore substation involved in the present invention has the following beneficial effects: the present invention arranges the main transformer module, GIS module, distribution device module and secondary equipment module on the platform of the wind turbine foundation, which is close to the wind turbine. Multiple 35kV submarine cable collection line groups are collected nearby to the present invention for boosting and then sent out uniformly, which can greatly reduce the investment in submarine cables; the distributed modular offshore substation shares the same foundation with the wind turbine, saving foundation investment; the distributed modular offshore substation is divided into four modules, which are small in size, light in weight, and easy to install and operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a plan view of the present invention.

[0015] Figure 2 It is a schematic elevation view of the present invention.

[0016] Component number description

[0017] 1 Basics

[0018] 2 Loading platform

[0019] 3 Main transformer module

[0020] 31 Transformer body

[0021] 32 Radiator

[0022] 4 GIS module

[0023] 41 GIS ontology

[0024] 42 Huikong Counter

[0025] 5 Power distribution unit module

[0026] 51 Inflatable Cabinet

[0027] 52. Earthing resistance complete equipment

[0028] 6 Secondary equipment module

[0029] 61 Secondary protection screen

[0030] 62 Measurement control panel

[0031] 63 Power screen

[0032] 7 Wind turbine tower DETAILED DESCRIPTION

[0033] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0034] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of the relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0035] like Figure 1 and Figure 2 As shown, the present invention provides a distributed modular offshore substation, including a foundation 1, the bottom of the foundation 1 extends into the seabed, the top of the foundation 1 is provided with a bearing platform 2, and the bearing platform 2 is provided with a main transformer module 3, a GIS module 4, a distribution device module 5 and a secondary equipment module 6; the high-voltage side of the main transformer module 3 is connected to the GIS module 4 through a cable, the low-voltage side of the main transformer module 3 is connected to the distribution device module 5 through a cable, and the main transformer module 3, the GIS module 4, and the distribution device module 5 are also connected to the secondary equipment module 6 through cables.

[0036] like Figure 1 and Figure 2As shown, preferably, a wind turbine tower 7 is provided on the bearing platform 2, and the main transformer module 3, GIS module 4, distribution device module 5 and secondary equipment module 6 are arranged around the wind turbine tower 7, and the arrangement is relatively reasonable. In addition, the present invention does not need to set up a separate foundation, and the bearing platform 2 and the wind turbine generator set share the same foundation. It is particularly suitable for offshore wind farm projects in which the wind turbine foundation adopts a conductor pipe frame or the like. Of course, when adopting the distributed modular offshore substation form of the present invention, it is necessary to set the diameter of the foundation 1 to be larger than the diameter of a conventional wind turbine foundation.

[0037] like Figure 1 and Figure 2 As shown, preferably, the main transformer module 3 includes a 110 / 35kV double-winding transformer and a neutral point device thereof, the transformer is located in a transformer body 31 inside the box structure, and the main transformer module 3 also includes a radiator 32 located outside the box structure, the transformer body 31 and the radiator 32 are connected, and the radiator is used to dissipate heat from the transformer;

[0038] like Figure 1 and Figure 2 As shown, preferably, the high-voltage side of the main transformer module 3 is connected to the GIS module 4 through a 110kV cable, and the low-voltage side of the main transformer module 3 is connected to the distribution device module 5 through a 35kV cable. The cables are sealed with special fireproof sealing modules at the places where they pass through the cabins of each module, such as casings and sealing rings made of fireproof materials.

[0039] like Figure 1 and Figure 2 As shown, preferably, the GIS module 4 includes a GIS body 41 and a control cabinet 42 located in the box structure; the power distribution device module 5 includes an inflatable cabinet 51 and a grounding resistance complete set of equipment 52 located in the box structure; the secondary equipment module 6 includes a secondary protection screen 61, a measurement control screen 62, a power supply screen 63 and other equipment located in the box structure.

[0040] like Figure 1 and Figure 2 As shown, preferably, the box-type structure of the main transformer module 3, GIS module 4, power distribution device module 5 and secondary equipment module 6 is a steel structure type, composed of steel structure columns, corrugated plates and rock wool, etc. The main transformer module 3, GIS module 4, power distribution device module 5 and secondary equipment module 6 are respectively connected to the bearing platform 2 by bolts, so that the connection between the main transformer module 3, GIS module 4, power distribution device module 5 and secondary equipment module 6 and the bearing platform 2 is more reliable, avoiding safety hazards, and is more convenient to install and disassemble.

[0041] Preferably, the main transformer module 3, GIS module 4, power distribution device module 5 and secondary equipment module 6 are all equipped with independent ventilation and air-conditioning equipment to ensure that the internal operating environment of the module meets the equipment requirements.

[0042] During the installation of the present invention, each prefabricated electrical equipment is transported to the steel structure module construction base, and the installation and internal wiring are completed to form the main transformer module 3, GIS module 4, power distribution device module 5 and secondary equipment module 6. It is transported to the installation site of the distributed offshore substation by a small floating crane, and each module is sequentially hoisted on the bearing platform 2 by the floating crane, and is connected and fixed with the basic steel structure of the bearing platform 2 by bolts, and then the main transformer module 3, GIS module 4, power distribution device module 5 and secondary equipment module 6 are connected by cables, and finally the overall commissioning of the substation is carried out.

[0043] Therefore, the present invention can collect multiple 35kV submarine cable collection line groups nearby to boost the voltage and then send them out uniformly from the main transformer module 3, which can greatly reduce the investment in submarine cables and the basic investment in offshore substations.

[0044] In summary, the present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0045] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A distributed modular offshore substation, characterized in that: The invention comprises a foundation (1), the bottom of the foundation (1) extends into the seabed, the top of the foundation (1) is provided with a bearing platform (2), the bearing platform (2) is provided with a main transformer module (3), a GIS module (4), a power distribution device module (5) and a secondary equipment module (6); the high-voltage side of the main transformer module (3) is connected to the GIS module (4) through a cable, the low-voltage side of the main transformer module (3) is connected to the power distribution device module (5) through a cable, the main transformer module (3), the GIS module (4) , the power distribution device module (5) is also connected to the secondary equipment module (6) through cables; a wind turbine tower (7) is provided on the bearing platform (2), and the main transformer module (3), the GIS module (4), the power distribution device module (5) and the secondary equipment module (6) are arranged around the wind turbine tower (7); the main transformer module (3) includes a transformer body (31) located inside the box structure and a radiator (32) located outside the box structure, and the transformer body (31) and the radiator (32) are connected.

2. The distributed modular offshore substation according to claim 1, characterized in that: The main transformer module (3), the GIS module (4), the power distribution device module (5) and the secondary equipment module (6) are respectively connected to the bearing platform (2) by means of bolts.

3. The distributed modular offshore substation according to claim 1, characterized in that: The high-voltage side of the main transformer module (3) is connected to the GIS module (4) via a 110 kV cable, and the low-voltage side of the main transformer module (3) is connected to the power distribution device module (5) via a 35 kV cable.

4. The distributed modular offshore substation according to claim 1, characterized in that: The GIS module (4) comprises a GIS body (41) and a control cabinet (42) located in a box-type structure.

5. The distributed modular offshore substation according to claim 1, characterized in that: The power distribution device module (5) comprises an inflatable cabinet (51) and a grounding resistance complete set of equipment (52) located in a box-type structure.

6. The distributed modular offshore substation according to claim 1, characterized in that: The secondary equipment module (6) comprises a secondary protection screen (61), a measurement control screen (62), and a power supply screen (63) located in the box structure.

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