Abstract
Disclosed is a method of manufacturing an offshore substation topside for assisting in transporting electricity generated by an offshore wind farm arranged at a first location to land. The offshore substation topside comprising a first deck and a first block arranged on the first deck, wherein the first block comprises a plurality of modules including a first module and a second module, each module of the plurality of modules comprises one or more standardized sections selected from a group of standardized section, each standardized section comprises a self-supporting frame. The first module of the plurality of modules is manufactured at a second location, the first module and the second module of the plurality of modules having at least one standardized section in common, and the plurality of modules being assembled into the first block at a location remote from the second location.
Claims
1.-15. (canceled)
16. A method of manufacturing an offshore substation topside, comprising: installing an offshore support structure at a first location adjacent to an offshore wind turbine farm; securing a deck to the offshore support structure; and connecting a plurality of modules to form a first block, wherein each module of the plurality of modules comprises one or more standardized sections, each standardized section having a self-supporting frame; wherein the plurality of modules are manufactured at a second location, and wherein the plurality of modules are assembled into the first block either on the deck or at a third location.
17. The method of claim 16, wherein the third location is more proximal to the first location than the second location.
18. The method of claim 16, further comprising adding one or more gas insulated switch gears (GIS) and one or more transformers to the offshore substation topside.
19. The method of claim 18, further comprising operably connecting the offshore substation topside to the wind turbine farm to receive current, increase the voltage of the current, and provide the increased voltage current to one or more export cables for transporting the increased voltage current towards the shore.
20. The method of claim 16, wherein the one or more standardized sections in a module are of similar heights.
21. The method of claim 16, wherein the one or more standardized sections in a module are of similar voltage housing capacity.
22. The method of claim 16, further comprising connecting another plurality of modules to form a second block, wherein each module of the plurality of modules comprises one or more standardized sections, each standardized section having a self-supporting frame, wherein the second block is disposed on the first block.
23. The method of claim 22, wherein the first block and second block have different types of standardized sections.
24. The method of claim 16, wherein two or more of the plurality of modules are manufactured with flanges at positions on the respective modules to allow connection.
25. The method of claim 16, wherein one or more of the plurality of modules comprises a ventilation subsystem for providing ventilation to the module.
26. The method of claim 16, wherein one or more of the plurality of modules comprises an electrical subsystem for providing electricity to equipment arranged in the modules.
27. The method of claim 16, wherein one or more of the plurality of modules comprises a fire extinguishing subsystem for at least one of detecting or extinguishing fire in the module.
28. The method of claim 16, wherein one or more of the plurality of modules comprises a ventilation subsystem, an electrical subsystem, and a fire extinguishing subsystem, wherein the subsystems are provided before the module is assembled into the first block.
29. The method of claim 28, wherein the ventilation subsystem, the electrical subsystem, and the fire extinguishing subsystem are tested at the second location.
30. The method of claim 16, further comprising providing a first standardized interface module configured to interface with a group of central systems and thereby provide connectivity for subsystems of the plurality of modules to the central systems.
31. The method of claim 22, wherein the first block comprises a first group of modules comprising standardized sections selected from a first subgroup of standardized sections and the second block comprises a second group of modules comprising standardized section selected from a second subgroup of standardized sections.
32. An offshore substation topside for assisting in transporting electricity generated by an offshore wind farm to land, the offshore substation topside being supported by an offshore support structure and comprising: one or more gas insulated switch gears (GIS); one of more transformers; a first deck; and a first block arranged on the first deck, wherein the first block comprises a plurality of pre-assembled modules including a first module and a second module, each module of the plurality of modules comprises one or more standardized sections selected from a group of standardized sections, each standardized section comprises a self supporting frame, and wherein each of the first module and the second module is manufactured off-site.
33. The offshore substation topside of claim 32, wherein the first module and the second module have at least one standardized section in common.
34. The offshore substation topside of claim 32, further comprising a second block, wherein the second block comprises a plurality of pre-assembled modules, wherein each module of the plurality of modules comprises one or more standardized sections, each standardized section having a self-supporting frame, wherein the second block is disposed on the first block, and wherein the first block and second block have different groups of standardized sections.
35. The offshore substation topside of claim 32, wherein the one or more standardized sections in a module are of similar heights or similar voltage housing capacity.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0073] The above and/or additional objects, features and advantages of the present invention, will be further elucidated by the following illustrative and non-limiting detailed description of embodiments of the present invention, with reference to the appended drawings, wherein:
[0074] FIG. 1 shows a schematic view of an offshore substation platform according to an embodiment of the present invention.
[0075] FIG. 2 shows schematically an offshore substation topside according to an embodiment of the present invention.
[0076] FIG. 3a shows a schematic drawing of a group of standardized sections seen from the side according to an embodiment of the present invention.
[0077] FIG. 3b shows a schematic drawing of modules assembled by the group of standardized sections shown in FIG. 3a.
[0078] FIG. 4 shows a schematic drawing of a module according to an embodiment of the present invention.
[0079] FIG. 5 shows a flowchart of a method of manufacturing an offshore substation topside according to an embodiment of the present invention.
DETAILED DESCRIPTION
[0080] In the following description, reference is made to the accompanying figures, which show by way of illustration how the invention may be practiced.
[0081] FIG. 1 shows schematically an offshore substation platform for assisting in transporting electricity generated by an offshore wind farm to land according to an embodiment of the invention. The offshore substation platform comprises an offshore substation topside and an offshore support structure. The offshore substation platform is seen from the side. The offshore substation topside being supported by the offshore support structure being a jacket 191 in this embodiment. The offshore substation comprises a first set of gas insulated switch gears, GIS 140-143, a second set of GIS (not shown), and a transformer (not shown), wherein the first set of GIS 140-143 are adapted to receive AC current generated by at least a part of the wind turbines of the offshore wind farm and deliver the AC current to the transformer, the transformer being configured to increase the voltage of the AC current generated by the at least part of the wind turbine and deliver the AC current with the increased voltage to the second set of GIS. The second set of GIS being configured to provide the AC current with the increased voltage to one or more export cables for transporting the AC current towards the shore. The offshore substation topside further comprises a first deck 101 and a first block 100 arranged on the first deck 101. The first block 100 comprises a plurality of modules 110-116 including a first module 110, a second module 111, a third module 112, a fourth module 113, a fifth module 114, a sixth module 115, and a seventh module 116. Each module of the plurality of modules 110-116 comprises one or more standardized sections selected from a group of standardized sections, each standardized section comprises a self-supporting frame. In this embodiment, the first module 110, the fourth module 113 and the fifth module 114 each have two standardized sections, and the second module 111, the third module 112, sixth module 115, and the seventh module 116 each have a single standardized section. In this embodiment, the first module 110, the second module 111, the third module 112, and the fourth module 113 have one standardized section in common, and the first module 110 and the fourth module 113 have two standardized sections in common. Correspondingly, the fifth module, the sixth module 115 and the seventh module 116 have one standardized section in common. In this embodiment a first GIS 140 of the first set of GIS is arranged inside the first module 110, a second GIS 141 of the first set of GIS is arranged inside the second module 111, a third GIS 142 of the first set of GIS is arranged inside the third module 112, and a fourth GIS 143 of the first set of GIS is arranged inside the fourth module 113. Each GIS of the first group of GIS 140-143 is connected to a plurality of offshore wind turbines via their respective cable 170-173. In this embodiment, the first GIS 140 and the fourth GIS 143 are larger than the second GIS 141 and the third GIS 142. Thus, the first GIS 140 and the fourth GIS 143 may be connected to more offshore wind turbines and/or larger offshore wind turbines than the second GIS 141 and the third GIS 142. However, in other embodiment all GIS of the first group of GIS may be of equal size. In this embodiment, the fifth, sixth and seventh module 114-116, are arranged on top of the first, second, third and fourth module 110-113. Thus, the self-supporting frame of the standardized sections of the first, second, third and fourth module 110-113 is further adapted to support a module arranged on top of it. The fifth, sixth and seventh module 114-116 may house SCADA equipment 144 or the like. The first block 100 comprises further four standardized interface modules 130-133. The standardized interface modules 130-133 are configured to interface with a group of central systems 160 and thereby provide connectivity for subsystems of the modules 110-116 to the central systems 160. The central systems may comprise a ventilation system for providing ventilation and/or an electrical system for providing electricity to equipment in the plurality of modules 110-116. By providing the first block with interface modules 130-133 the remaining modules may be further standardized as there is no need to adapt their subsystems to the central systems of the offshore substation topside. The standardized interface modules 130-133 may be provided with ventilation tubes and/or electrical cables 150-151 for providing the connectivity.
[0082] Correspondingly, the modules 110-116 may be provided with ventilation tubes and/or electrical cables 152-153 configured to receive air and/or electricity from the standardized interface modules 130-133.
[0083] FIG. 2 shows schematically an offshore substation topside 200 according to an embodiment of the present invention. The offshore substation topside 200 is seen from the top. The offshore substation topside comprises a first block 201 and a second block 202. The first block 201 comprises four modules 210-213 where each module comprises one or more standardized sections (not shown). Correspondingly, the second block 202 comprises four modules 220-223 where each module comprises one or more standardized sections (not shown). The offshore substation topside 200 comprises a first set of GIS 214-217, a second set of GIS 224-227, and two transformers 203-204. The first set of GIS 214/217 is arranged inside the modules 210-213 of the first block 201 and is adapted to receive AC current generated by at least a part of the wind turbines of an offshore wind farm and further deliver the AC current to the two transformers 203-204. The two transformers 203-204 are arranged outside and are configured to increase the voltage of the AC current generated by the at least part of the wind turbine and deliver the AC current with the increased voltage to the second set of GIS 224-227. The second set of GIS 224-227 is arranged inside the modules 220-223 of the second block 202 and is configured to provide the AC current with the increased voltage to one or more export cables for transporting the AC current towards the shore. The offshore substation topside 200 may further comprise a shunt reactor 205 and a shunt reactor transformer 206.
[0084] FIG. 3a shows a schematic drawing of a group of standardized sections seen from the side according to an embodiment of the invention. The group of standardized sections comprises a first subgroup of standardized sections 312 having a first height, a second group of standardized section 311 having a second height, and a third subgroup of standardized sections 310 having a third height. In this embodiment the first subgroup 312 comprises two standardized sections 305-306, the second subgroup 311 comprises two standardized sections 303-304, and the third subgroup 310 comprises two standardized sections 301-302. The first height may be higher than the second height, and the second height is higher than the third height. As an example the first height may be between 5.8 and 6.7 meter e.g. 6.2 meter, the second height may be between 4.7 and 5.7 meter e.g. 5.2 meter, and the third height may be between 3.5 and 4.5 meter e.g. 4.0 meter. The first group of standardized sections may be adapted for forming modules suitable for housing high voltage, HV GIS e.g. GIS capable of handling voltages at or above 120 kV. The second group of standardized sections may be adapted for forming modules suitable for housing medium voltage, MV GIS e.g. GIS capable of handling voltages between 20-120 kV. The third group of standardized sections may be adapted for forming modules suitable for housing low voltage, LV, equipment such as SCADA equipment.
[0085] FIG. 3b shows a schematic drawing of modules assembled by the group of standardized sections shown in FIG. 3a. Shown is a first module 320, a second module 321, a third module 322, and a fourth module 323. The first module 320 has two identical sections 301 selected from the third subgroup 310, the second module has a first section 301 and a second section 302 selected from the third subgroup of sections, the third module 322 has two identical sections 304 selected from the second subgroup of sections 311, and the third module 323 has a single section 323 selected from the first subgroup of sections 312.
[0086] FIG. 4 shows a schematic drawing of a module 401 according to an embodiment of the invention. The module 401 has a single standardized section having a self-supporting frame i.e. a frame capable of supporting the weight of the module. Thus the module does not need any external support frame or structure. The module comprises a ventilation subsystem for providing ventilation to the module, an electrical subsystem for providing electricity to equipment in the module 401, and a fire extinguishing subsystem for extinguishing fires in the module 401. The ventilation subsystem comprises a main ventilation tube 402 extending along a first common central axis 422, the main ventilation tube 402 of the ventilation subsystem has an inlet 420 and an outlet 421. The ventilation subsystem may further comprise a ventilation outlet 423. The inlet 420 and the outlet 421 are configured to be connected to respective inlets/outlets of neighbouring modules e.g. by providing the inlet 420 and the outlet 421 with a flange or a bellow connector configured to be connected to a matching flange of a neighbouring module. The electrical subsystem comprises a first main electrical connector 430 and a second main electrical connector 431 arranged along a second common central axis 432. The electrical subsystem may further comprise one or more power outlets 433-435 e.g. for providing electricity to lightning devices, computers and other electrical devices. The fire extinguishing subsystem comprises a fire pipe 404 for transporting a fire extinguishing fluid, the fire pipe extending along a fifth common central axis 442, the fire pipe 404 of the fire extinguishing subsystem has an inlet 440 and an outlet 441. The fire extinguishing subsystem may further comprise a fire extinguishing sprinkler 443 and a fire detector 444. The inlet 440 and the outlet 441 are configured to be connected to respective inlets/outlets of neighbouring modules e.g. by providing the inlet 440 and the outlet 441 with a flange or a bellow connector configured to be connected to a matching flange of a neighbouring module. The electrical subsystem, the ventilation subsystem, and the fire extinguishing subsystem are preferably provided to the module during its manufacture, i.e. before the module is connected other modules and thereby assembled into a block. Furthermore, the electrical subsystem, the ventilation subsystem, and the fire extinguishing subsystem are preferably tested at location of or close to the location where the module 401 is manufactured e.g. away from the location where the module 401 is connected/attached to other modules to form the block. This allows any failures n subsystems of the modules to be detected before they are assembled into a block.
[0087] FIG. 5 shows a flowchart of a method of manufacturing an offshore substation topside according to an embodiment of the present invention. Firstly, in step 501 a plurality of modules is manufactured, where each module comprises one or more standardized sections. Preferably the plurality of modules is manufactured at a plurality of different locations, i.e. at different manufacturers and/or sub-suppliers. However, the plurality of modules may also be manufactured in a single factory. The plurality of modules is preferably provided with subsystems such as an electrical subsystem and/or an ventilation subsystem at the factory where they are produced. Next, in step 502 the plurality of modules is tested preferably at the factory where they have been manufactured. If the plurality of modules has been provided with subsystems then these subsystems may also be tested preferably at the factory where they are produced. This is done to make the assembly of the plurality of modules as simple and secure as possible. Next in step 503 at least some modules of the plurality of modules are transported from the location where they were manufactured to the location where they are going to be assembled into a block e.g. by a truck or a vessel (e.g. barge). The assembly location may be a location where one or more of the plurality of modules have been manufactured or a different location, i.e. a location where no modules have been manufactured. Then in step 504 the plurality of modules is assembled into one or more blocks e.g. by welding, bolting or stabbing the modules together. If the modules are provided with subsystems then the subsystems of the modules are also connected whereby the one or more blocks may directly be provided with a fully functional electrical system and/or a fully functional ventilation system. The plurality of modules may be assembled into one or more blocks on a deck of the offshore substation topside. Alternatively, the plurality of modules may be firstly be assembled into one or more blocks and then subsequently arranged on a deck of the offshore substation topside e.g. using crane. The assembly location is preferably a location relatively close to the location of the offshore wind farm whereby the transportation time of the deck and the one or more blocks may be reduced. In a preferred embodiment, the deck is firstly arranged on the offshore support structure, and the plurality of modules is then transported to the offshore support structure e.g. by vessel and then assembled into the first block offshore directly on top of the offshore support structure. This makes it possible to install an offshore substation topside without the need of a heavy lifting vessel capable of lifting an entire topside and/or deck with one or more blocks arranged thereon. This will potentially lower the costs especially when the offshore wind farm is being built at a location where there are no nearby heavy lifting vessels available.
[0088] Although some embodiments have been described and shown in detail, the invention is not restricted to them, but may also be embodied in other ways within the scope of the subject matter defined in the following claims. In particular, it is to be understood that other embodiments may be utilised and structural and functional modifications may be made without departing from the scope of the present invention.
[0089] In device claims enumerating several means, several of these means can be embodied by one and the same item of hardware. The mere fact that certain measures are recited in mutually different dependent claims or described in different embodiments does not indicate that a combination of these measures cannot be used to advantage.
[0090] It should be emphasized that the term comprises/comprising when used in this specification is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof.
