A cable layout method for an offshore booster station

Abstract

This invention relates to the field of new energy and power systems, specifically to a cable arrangement method for an offshore substation. The method includes arranging the incoming path for submarine collection cables, the outgoing path for submarine transmission cables, and the cable paths between the various compartments of the offshore substation. The medium-voltage distribution compartment and the high-voltage distribution compartment are arranged on the second floor of the upper module of the offshore substation, and the main transformer compartment is arranged on the first floor of the upper module. A medium-voltage cable compartment is arranged below the medium-voltage distribution compartment to form the aforementioned incoming path, and a high-voltage cable compartment is arranged below the high-voltage distribution compartment to form the aforementioned outgoing path. Cable interlayers are correspondingly arranged at the bottom of each auxiliary production compartment. Cable channels for each floor are arranged below the maintenance and repair passages of each floor. Cable shafts are arranged in the upper module, so that the medium-voltage cable compartment, the high-voltage cable compartment, the cable shafts, the cable interlayers, and the cable channels of each floor together form the cable paths between the various compartments of the offshore substation.

Description

Technical Field

[0001] This invention relates to the field of new energy and power systems, specifically to a cable arrangement method for an offshore substation. Background Technology

[0002] With the development and application of offshore wind power technology, offshore wind farms are becoming larger in scale and located in deeper waters. Offshore substations, as an important component of offshore wind farms, are complex to construct and costly. Therefore, optimizing the layout of offshore substations to reduce the area and load of offshore platforms is of great significance for the development of offshore wind power.

[0003] Due to the wide variety of cable types and complex wiring in offshore substations, the proper laying of various cable types is an unavoidable challenge in the design of offshore substations. To solve the cable laying problem in offshore substations, most offshore substations currently adopt a three-layer structure, with the bottom layer entirely designated as a cable layer for laying various types of cables. While designating the entire bottom layer of an offshore substation as a cable layer solves the cable laying problem, it doesn't fully utilize the space. Therefore, three-layer offshore substation platforms generally have a large total area. Furthermore, this type of substation lacks optimization for low-voltage and control cable routing. Typically, low-voltage and control cables between two compartments must run down from one compartment to the cable layer, then through the cable layer to the bottom of the other compartment, and finally up to the other compartment. This unnecessarily increases the length of low-voltage and control cables, as well as the space occupied by cable laying, the amount of cable installation work, and the construction cost of the offshore substation. Additionally, laying all types of cables in the cable layer without differentiation leads to cross-contamination and a messy arrangement, making cable maintenance difficult.

[0004] To address the aforementioned issues, existing technologies have proposed a double-layer offshore substation. This involves setting up a main transformer compartment, a high-voltage cable mezzanine, and a medium-voltage cable mezzanine at the bottom of the upper module of the substation. While utilizing the bottom layer of the upper module for the main transformer compartment, it also serves as a cable layer for the substation's power collection cables, submarine transmission cables, medium-voltage cables between the medium-voltage distribution room and the main transformer compartment, and high-voltage cables between the high-voltage distribution room and the main transformer compartment. However, this approach does not address the optimization of low-voltage and control cable channels. In practical applications, this can easily lead to unnecessary increases in the length of low-voltage and control cables, increasing the space occupied by cable laying, the amount of cable construction work, and ultimately, the construction cost of the offshore substation.

[0005] The above reasons have resulted in the lack of optimization of low-voltage cable channels and control cable channels in the existing cable layout methods for offshore substations. This easily leads to the unnecessary increase in the length of low-voltage cables and control cables, the increase in the space occupied by cable laying, the increase in the amount of cable construction work, and the increase in the construction cost of offshore substations. Summary of the Invention

[0006] This invention provides a cable layout method for offshore substations, solving the technical problem that existing offshore substation cable layouts lack optimization of low-voltage cable channels and control cable channels, easily leading to unnecessary increases in the length of low-voltage and control cables, increased space occupied by cable laying, increased cable construction workload, and increased construction costs for offshore substations.

[0007] The technical solution adopted in this invention is: a cable arrangement method for an offshore substation, including arranging a cable channel for the offshore substation, wherein the cable channel for the offshore substation includes an incoming path for the submarine cable of the power collection line, an outgoing path for the submarine transmission cable, and cable paths between the various compartments of the offshore substation.

[0008] The cable channel arrangement method includes: arranging the medium-voltage power distribution compartment and the high-voltage power distribution compartment on the second floor of the upper module of the offshore booster station; arranging the main transformer compartment, which occupies two floors, on the first floor of the upper module; arranging the medium-voltage cable compartment below the medium-voltage power distribution compartment on the first floor of the upper module to form the incoming path of the submarine cable for the power collection line; and arranging the high-voltage cable compartment below the high-voltage power distribution compartment to form the outgoing path of the submarine transmission cable.

[0009] Cable interlayers are arranged at the bottom of each auxiliary production compartment in the upper module; cable channels are arranged below the maintenance and repair passages of each layer in the upper module, so that the cable interlayers at the bottom of the auxiliary production compartments in each layer of the upper module are connected to the cable channels of the same layer, and the medium-voltage cable compartment, the main transformer compartment and the high-voltage cable compartment are connected to the cable channels of the second layer.

[0010] Cable shafts are arranged in the upper module to connect the cable channels of each layer; the medium-voltage cable compartment, the high-voltage cable compartment, the cable shafts, each cable layer and the cable channels of each layer together form the cable path between the compartments of the offshore substation; the cable path can be used to lay low-voltage cables and control cables between the compartments of the offshore substation.

[0011] One of the auxiliary production compartments is configured as a station power distribution room, and the low-voltage cables between the compartments of the offshore booster station include the low-voltage cables between the station power distribution room and the other auxiliary production compartments.

[0012] One of the auxiliary production compartments is designated as a relay protection room, and the control cables between the compartments of the offshore booster station include control cables and / or control optical cables between the relay protection room and the other auxiliary production compartments.

[0013] The high voltage referred to in this invention includes voltage levels of 110KV and above, the medium voltage includes voltage levels of 35KV and 66KV, and the low voltage includes voltage levels of 220V DC and 380V three-phase AC.

[0014] By arranging a medium-voltage cable compartment below the medium-voltage distribution compartment in the first layer of the upper module to form the incoming path of the submarine power collection line cable, and arranging a high-voltage cable compartment below the high-voltage distribution compartment to form the outgoing path of the submarine transmission cable; the submarine power collection line cable can pass upward along the conduit of the offshore substation into the medium-voltage cable compartment, and then continue upward into the medium-voltage distribution compartment, connecting to the medium-voltage distribution equipment within the medium-voltage distribution compartment; and the submarine transmission cable can pass upward along the conduit of the offshore substation into the high-voltage cable compartment, and then continue upward into the high-voltage distribution compartment, connecting to the high-voltage distribution equipment within the high-voltage distribution compartment; and by arranging the medium-voltage cable compartment, the high-voltage cable compartment, and the high-voltage cable compartment, ... The cable compartments, cable shafts, cable mezzanines, and cable channels on each floor together form the cable pathways between the compartments of the offshore substation, used for laying low-voltage and control cables between the compartments. The cable mezzanines and cable channels are arranged using the extra space in the upper module along the floor height, and the medium-voltage and high-voltage cable compartments also serve as laying channels for low-voltage and control cables. This improves the space utilization of the cable pathways and allows for differentiated arrangements of high-voltage, medium-voltage, and other cables (low-voltage and control cables). This helps reduce the area of ​​the offshore substation platform, saves cable laying space, and reduces cable length and construction workload. This solves the problem in existing offshore substation cable layout methods that lack optimization of low-voltage and control cable channels, easily leading to unnecessary increases in the length of low-voltage and control cables, increased space occupied by cable laying, increased cable construction workload, and increased construction costs for offshore substations.

[0015] Furthermore, the auxiliary production compartments include relay protection room, station power distribution room, emergency power distribution room, station substation room, grounding resistor cabinet room, battery room, fire-fighting equipment room, rest and refuge room, power supply room, emergency diesel engine room, ventilation room, spare parts room or tool room.

[0016] Furthermore, both the station power distribution room and the relay protection room are located adjacent to the cable shaft.

[0017] Furthermore, the cable path can also be used to lay high-voltage cables between the various compartments of the offshore substation.

[0018] The high-voltage cable includes a high-voltage cable connecting the high-voltage power distribution equipment in the high-voltage power distribution compartment to the high-voltage side of the main transformer in the corresponding main transformer compartment.

[0019] Furthermore, the method for laying the high-voltage cable includes: one end of the high-voltage cable is connected to the high-voltage power distribution equipment in the high-voltage power distribution compartment, and the other end of the high-voltage cable passes through the high-voltage cable compartment and the cable duct on the second floor in sequence, and then passes into the corresponding main transformer compartment, and is connected to the high-voltage side of the main transformer in the main transformer compartment.

[0020] In another technical solution, if the high-voltage cable compartment below the high-voltage distribution compartment is adjacent to the corresponding main transformer compartment, the method of laying the high-voltage cable includes: one end of the high-voltage cable is connected to the high-voltage distribution equipment in the high-voltage distribution compartment, and the other end of the high-voltage cable passes through the high-voltage cable compartment and then directly passes through the corresponding main transformer compartment, and is connected to the high-voltage side of the main transformer in the main transformer compartment.

[0021] Furthermore, the cable path can also be used to lay medium-voltage cables between the various compartments of the offshore substation.

[0022] The medium-voltage cable includes a medium-voltage cable connecting the medium-voltage power distribution equipment in the medium-voltage power distribution compartment to the medium-voltage side of the main transformer in the corresponding main transformer compartment.

[0023] Furthermore, the method for laying the medium-voltage cable includes: one end of the medium-voltage cable is connected to the medium-voltage power distribution equipment in the medium-voltage power distribution compartment, and the other end of the medium-voltage cable passes through the medium-voltage cable compartment and the cable channel on the second floor in sequence, and then passes into the corresponding main transformer compartment, and is connected to the medium-voltage side of the main transformer in the main transformer compartment.

[0024] In another technical solution, if the medium-voltage cable compartment below the medium-voltage distribution compartment is arranged adjacent to the corresponding main transformer compartment, the method of laying the medium-voltage cable includes: one end of the medium-voltage cable is connected to the medium-voltage power distribution equipment in the medium-voltage distribution compartment, and the other end of the medium-voltage cable passes through the medium-voltage cable compartment and then directly passes through the corresponding main transformer compartment, and is connected to the medium-voltage side of the main transformer in the main transformer compartment.

[0025] Furthermore, if the upper module has multiple medium-voltage power distribution compartments on its second floor, the medium-voltage cables also include bus tie cables connecting the bus tie cabinets of each medium-voltage power distribution device.

[0026] Furthermore, if at least one of the auxiliary production compartments is configured as a station substation, the medium-voltage cable also includes a station incoming cable connecting the medium-voltage power distribution equipment in the medium-voltage power distribution compartment to the medium-voltage side of the station transformer in the station substation.

[0027] Furthermore, if any of the cable interlayers contains only the low-voltage cable and the control cable, then the height of the cable interlayer shall be not less than 0.6 meters.

[0028] If the medium-voltage cable is laid in any of the cable interlayers, the height of the cable interlayer shall be not less than 1.2 meters.

[0029] The cable tunnel includes a low-voltage section where only the low-voltage cable and the control cable are laid, and a medium-voltage section where the medium-voltage cable is laid. The depth of the low-voltage section is not less than 0.6 meters, and the depth of the medium-voltage section is not less than 1.2 meters.

[0030] Furthermore, at least one first inspection port is provided on the floor of each of the auxiliary production compartments, allowing operators to enter the corresponding cable interlayer for maintenance work through the first inspection port in the auxiliary production compartment; each first inspection port is equipped with a first inspection cover.

[0031] By setting up the first inspection port, it is convenient for operators to enter the cable interlayer to carry out maintenance and repair work.

[0032] Furthermore, multiple second inspection ports are provided on the floor of the maintenance and repair passage on each layer of the upper module, allowing operators to enter the cable tray on the same layer for maintenance work through the second inspection ports on the floor of the maintenance and repair passage on each layer; each second inspection port is equipped with a second inspection cover.

[0033] By setting up the second inspection port, it is possible for operators to easily enter the cable tunnels on each floor to carry out maintenance and repair work.

[0034] Furthermore, at least one of the auxiliary production compartments is arranged using the spare space in the high-voltage cable compartment; and at least one of the auxiliary production compartments is arranged using the spare space in the medium-voltage cable compartment.

[0035] The narrowest point of the high-voltage cable compartment shall be no less than 3.5 meters wide, and the narrowest point of the medium-voltage cable compartment shall be no less than 2.5 meters wide.

[0036] Because using all the space below the high-voltage power distribution compartment to house the high-voltage cable compartment, and using all the space below the medium-voltage power distribution compartment to house the medium-voltage cable compartment, creates a large amount of extra space in both the high-voltage cable compartment and the medium-voltage cable compartment.

[0037] By utilizing the spare space in the high-voltage cable compartment to arrange at least one auxiliary production compartment, and by utilizing the spare space in the medium-voltage cable compartment to arrange at least one auxiliary production compartment, the space below the high-voltage power distribution compartment and the spare space below the medium-voltage power distribution compartment can be utilized more fully, thereby improving the space utilization rate of the offshore substation, further reducing the platform area of ​​the offshore substation, and lowering the construction cost of the offshore substation. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the upper module of the offshore substation in the embodiment;

[0039] Figure 2 This is a schematic diagram of the upper module in the embodiment;

[0040] Figure 3 This is a two-layer plan view of the upper module in the embodiment;

[0041] Figure 4 This is a top view of the cable clamp structure in the embodiment;

[0042] Figure 5 for Figure 4 AA cross-section view;

[0043] Figure 6 This is a top view of the structure inside the station power distribution room in the embodiment;

[0044] Figure 7 This is a schematic diagram of the structure of the station power distribution room and the cable interlayer below it in the embodiment;

[0045] Figure 8 This is a top view of the cable interlayer structure in the embodiment;

[0046] Among them, 1—submarine cable for power collection lines, 2—submarine transmission cable, 3—medium-voltage power distribution compartment, 4—high-voltage power distribution compartment, 5—main transformer compartment, 6—medium-voltage cable compartment, 7—high-voltage cable compartment, 8—cable interlayer, 9—floor of maintenance and repair passage, 10—cable tunnel, 11—cable shaft, 12—conduit rack, 13—relay protection room, 14—station service power distribution room, 15—emergency power distribution room, 16—station service substation, 17—grounding resistor cabinet room, 18—storage 19—Battery Room, 20—Fire Equipment Room, 21—Rest and Refuge Room, 22—Power Supply Room, 23—Emergency Diesel Engine Room, 24—Ventilation Fan Room, 25—Spare Parts Room, 26—High Voltage Power Distribution Equipment, 27—Main Transformer, 28—High Voltage Cable, 29—Medium Voltage Power Distribution Equipment, 30—Medium Voltage Cable, 31—First Inspection Cover, 32—Second Inspection Cover, 33—First Cable Support, 34—Second Cable Support, 35—Station Transformer, 36—Tool Room. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will now be clearly and completely described with reference to the accompanying drawings:

[0048] like Figures 1 to 3 As shown, this embodiment provides a cable arrangement method for an offshore substation, including arranging cable channels for the offshore substation. The cable channels for the offshore substation include the incoming path of the submarine collection cable 1, the outgoing path of the submarine transmission cable 2, and the cable channels between the various compartments of the offshore substation.

[0049] The cable channel layout method includes: arranging the medium-voltage distribution compartment 3 and the high-voltage distribution compartment 4 on the second floor of the upper module of the offshore substation, arranging the main transformer compartment 5, which occupies two floors, on the first floor of the upper module, arranging the medium-voltage cable compartment 6 below the medium-voltage distribution compartment 3 on the first floor of the upper module to form the incoming path of the submarine cable 1, and arranging the high-voltage cable compartment 7 below the high-voltage distribution compartment 4 to form the outgoing path of the submarine transmission cable 2.

[0050] Cable interlayers 8 are arranged at the bottom of each auxiliary production compartment in the upper module; cable channels 10 are arranged below the maintenance and repair passages of each layer in the upper module, so that the cable interlayers 8 at the bottom of each auxiliary production compartment in the upper module are connected to the cable channels 10 of the same layer, and the medium-voltage cable compartment 6, main transformer compartment 5 and high-voltage cable compartment 7 are connected to the cable channels 10 of the second layer; cable shafts 11 are arranged in the upper module to connect the cable channels 10 of each layer; the medium-voltage cable compartment 6, high-voltage cable compartment 7, cable shafts 11, each cable interlayer 8 and each layer's cable channels 10 together form the cable path between the compartments of the offshore substation; the cable path can be used to lay low-voltage cables and control cables between the compartments of the offshore substation.

[0051] One of the auxiliary production compartments is set up as the station power distribution room 14. The low-voltage cables between the compartments of the offshore substation include the low-voltage cables between the station power distribution room 14 and other auxiliary production compartments (the low-voltage cables between the compartments of the offshore substation are mainly the low-voltage cables between the station power distribution room 14 and other auxiliary production compartments).

[0052] One of the auxiliary production compartments is designated as the relay protection room 13. The control cables between the compartments of the offshore booster station include control cables and / or control optical cables between the relay protection room 13 and other auxiliary production compartments (the control cables between the compartments of the offshore booster station are mainly control cables and / or control optical cables between the relay protection room 13 and other auxiliary production compartments).

[0053] The high voltage referred to in this invention includes voltage levels of 110KV and above, the medium voltage includes voltage levels of 35KV and 66KV, and the low voltage includes voltage levels of 220V DC and 380V three-phase AC.

[0054] By arranging a medium-voltage cable compartment 6 below the medium-voltage distribution compartment 3 in the upper module to form the incoming path of the submarine collection cable 1, and arranging a high-voltage cable compartment 7 below the high-voltage distribution compartment 4 to form the outgoing path of the submarine transmission cable 2, the submarine collection cable 1 can pass upward through the conduit 12 of the coastal substation into the medium-voltage cable compartment 6, and continue upward into the medium-voltage distribution compartment 3, connecting to the medium-voltage distribution equipment 28 within the medium-voltage distribution compartment 3; and the submarine transmission cable 2 can pass upward through the conduit 12 of the coastal substation into the high-voltage cable compartment 7, and continue upward into the high-voltage distribution compartment 4, connecting to the high-voltage distribution equipment 25 within the high-voltage distribution compartment 4; and by arranging the medium-voltage cable compartment 6, The high-voltage cable compartment 7, cable shaft 11, cable mezzanines 8, and cable channels 10 on each floor together form the cable pathways between the compartments of the offshore substation for laying low-voltage and control cables. The cable mezzanines 8 and cable channels 10 are arranged using the extra space in the upper modules along the floor height, and the medium-voltage cable compartment 6 and high-voltage cable compartment 7 are used as laying channels for low-voltage and control cables. This improves the space utilization of the cable pathways and allows for differentiated arrangements of high-voltage, medium-voltage, and other cables (low-voltage and control cables). This helps reduce the area of ​​the offshore substation platform, saves cable laying space, and reduces cable length and construction workload. This solves the problem in existing offshore substation cable layout methods that lack optimization of low-voltage and control cable channels, easily leading to unnecessary increases in the length of low-voltage and control cables, increased space occupied by cable laying, increased cable construction workload, and increased construction costs for offshore substations.

[0055] Specifically, such as Figures 1 to 3 As shown, there are two medium-voltage power distribution compartments 3, 4 high-voltage power distribution compartments, and 5 main transformer compartments. Each medium-voltage power distribution compartment 3 has a medium-voltage cable compartment 6 below it to form the incoming path of the two collecting lines submarine cable 1. Each high-voltage power distribution compartment 4 has a high-voltage cable compartment 7 below it to form the outgoing path of the two submarine transmission cables 2.

[0056] One main transformer compartment 5 is correspondingly set with one medium-voltage power distribution compartment 3 and one high-voltage power distribution compartment 4; another main transformer compartment 5 is correspondingly set with another medium-voltage power distribution compartment 3 and another high-voltage power distribution compartment 4.

[0057] Among them, such as Figures 1 to 3 As shown, the auxiliary production compartments are: relay protection room 13, station power distribution room 14, emergency power distribution room 15, station substation room 16, grounding resistor cabinet room 17, battery room 18, fire equipment room 19, rest and refuge room 20, power supply room 21, emergency diesel engine room 22, ventilation fan room 23, spare parts room 24 or tool room 35.

[0058] Among them, such as Figure 2 and Figure 3 As shown, in this embodiment, the station power distribution room 14 and the relay protection room 13 are both located in the adjacent cable shaft 11.

[0059] Since the low-voltage cables between the various compartments of the offshore substation are mainly low-voltage cables between the substation power distribution room 14 and other auxiliary production compartments, and the control cables between the various compartments of the offshore substation are mainly control cables and / or control optical cables between the relay protection room 13 and other auxiliary production compartments, arranging both the substation power distribution room 14 and the relay protection room 13 in adjacent cable shafts 11 can avoid unnecessary back-and-forth crossing of low-voltage cables between the substation power distribution room 14 and other auxiliary production compartments on different floors in the planar direction, effectively reducing the total length of the cables. It can also avoid unnecessary back-and-forth crossing of control cables and / or control optical cables between the relay protection room 13 and other auxiliary production compartments on different floors in the planar direction, effectively controlling the total length of the cables and / or control optical cables.

[0060] Preferably, in this embodiment, such as Figure 2 and Figure 3As shown, the cable shaft 11 is located on the second floor of the upper module of the offshore substation. The relay protection room 13 and the station power distribution room 14 are both located on the first floor of the upper module of the offshore substation. The cable shaft 11 is located above the station power distribution room 14. The cable shaft 11 is used to connect the cable tunnel 10 on the second floor and the indoor space of the station power distribution room 14. It is also connected to the cable tunnel 8 below the station power distribution room 14 through the indoor space of the station power distribution room 14, thereby realizing the connection between the cable tunnel 10 on the second floor and the cable tunnel 10 on the first floor. The relay protection room 13 is located adjacent to the station power distribution room. The location of room 14: By adopting the above-mentioned arrangement method, the station service distribution room 14 located on the first floor of the upper block of the offshore substation is directly connected to the cable shaft room 11 located on the second floor of the upper block of the offshore substation. The spare space in the station service distribution room 14 is used as the cable shaft room on the first floor of the upper block of the offshore substation. It is not necessary to set up a cable shaft room on the first floor of the upper block of the offshore substation, which further improves the space utilization of the offshore substation. At the same time, it also meets the need that the relay protection room 13 and the station service distribution room 14 are both located in the vicinity of the cable shaft room 11.

[0061] Among them, such as Figures 1 to 3 As shown, the cable path can also be used to lay high-voltage cables between the various compartments of an offshore substation.

[0062] The high-voltage cable includes a high-voltage cable 27 connecting the high-voltage power distribution equipment 25 in the high-voltage power distribution compartment 4 to the high-voltage side of the main transformer 26 in the corresponding main transformer compartment 5.

[0063] The laying methods for high-voltage cable 27 include the following three schemes:

[0064] Option 1:

[0065] If the high-voltage distribution compartment 4 is located adjacent to the corresponding main transformer compartment 5, the laying method of the high-voltage cable 27 includes: one end of the high-voltage cable 27 is connected to the high-voltage distribution equipment 25 in the high-voltage distribution compartment 4, and the other end of the high-voltage cable 27 is directly inserted into the corresponding main transformer compartment 5 and connected to the high-voltage side of the main transformer 26 in the main transformer compartment 5.

[0066] Option 2:

[0067] If the high-voltage cable compartment 7 below the high-voltage distribution compartment 4 is located adjacent to the corresponding main transformer compartment 5, the laying method of the high-voltage cable 27 includes: one end of the high-voltage cable 27 is connected to the high-voltage power distribution equipment 25 in the high-voltage distribution compartment 4, and the other end of the high-voltage cable 27 is inserted into the high-voltage cable compartment 7 and then directly inserted into the corresponding main transformer compartment 5, and connected to the high-voltage side of the main transformer 26 in the main transformer compartment 5.

[0068] Option 3:

[0069] If neither the high-voltage distribution compartment 4 nor the high-voltage cable compartment 7 below it is adjacent to the corresponding main transformer compartment 5, the laying method of the high-voltage cable 27 includes: one end of the high-voltage cable 27 is connected to the high-voltage distribution equipment 25 in the high-voltage distribution compartment 4, and the other end of the high-voltage cable 27 passes through the high-voltage cable compartment 7 and the cable duct 10 on the second floor in sequence, and then passes into the corresponding main transformer compartment 5 and is connected to the high-voltage side of the main transformer 26 in the main transformer compartment 5.

[0070] In this embodiment, as Figure 1 As shown, the high-voltage distribution compartment 4 and the high-voltage cable compartment 7 below it are both adjacent to the corresponding main transformer compartment 5. The laying method of the high-voltage cable 27 can adopt the above-mentioned scheme one or scheme two.

[0071] like Figure 1 As shown, in this embodiment, the high-voltage cable 27 is laid using the above-mentioned Scheme 2.

[0072] Among them, such as Figures 1 to 3 As shown, the cable path can also be used to lay medium-voltage cables between the various compartments of an offshore substation.

[0073] Medium-voltage cables include medium-voltage cables 29 connecting the medium-voltage power distribution equipment 28 in the medium-voltage power distribution compartment 3 to the medium-voltage side of the main transformer 26 in the corresponding main transformer compartment 5.

[0074] The laying methods for medium-voltage cable 29 include the following three schemes:

[0075] Option A:

[0076] If the medium-voltage distribution compartment 3 is located adjacent to the corresponding main transformer compartment 5, the laying method of the medium-voltage cable 29 includes: one end of the medium-voltage cable 29 is connected to the medium-voltage power distribution equipment 28 in the medium-voltage distribution compartment 3, and the other end of the medium-voltage cable 29 is directly inserted into the corresponding main transformer compartment 5 and connected to the medium-voltage side of the main transformer 26 in the main transformer compartment 5.

[0077] Option B:

[0078] If the medium-voltage cable compartment 6 below the medium-voltage distribution compartment 3 is located adjacent to the corresponding main transformer compartment 5, the laying method of the medium-voltage cable 29 includes: one end of the medium-voltage cable 29 is connected to the medium-voltage power distribution equipment 28 in the medium-voltage distribution compartment 3, and the other end of the medium-voltage cable 29 is passed through the medium-voltage cable compartment 6 and then directly passed into the corresponding main transformer compartment 5, and connected to the medium-voltage side of the main transformer 26 in the main transformer compartment 5.

[0079] Option C:

[0080] If the medium-voltage distribution compartment 3 and the medium-voltage cable compartment 6 below it are not adjacent to the corresponding main transformer compartment 5, the laying method of the medium-voltage cable 29 includes: one end of the medium-voltage cable 29 is connected to the medium-voltage power distribution equipment 28 in the medium-voltage distribution compartment 3, and the other end of the medium-voltage cable 29 passes through the cable channel 10 on the second floor in sequence through the medium-voltage cable compartment 6, and then passes into the corresponding main transformer compartment 5, and is connected to the medium-voltage side of the main transformer 26 in the main transformer compartment 5.

[0081] In this embodiment, as Figure 1 As shown, the medium-voltage power distribution compartment 3 and the medium-voltage cable compartment 6 below it are both located adjacent to the corresponding main transformer compartment 5. The medium-voltage cable 29 can be laid using either scheme A or scheme B as described above.

[0082] like Figure 1 As shown, in this embodiment, the high-voltage cable 27 is laid using the above-mentioned scheme B.

[0083] If the upper module has multiple medium-voltage power distribution compartments 3 on the second floor, the medium-voltage cables also include bus tie cables connecting the bus tie cabinets of each medium-voltage power distribution equipment 28.

[0084] In this embodiment, as Figure 3 As shown, the upper module has two medium-voltage power distribution compartments 3 arranged on the second floor. The medium-voltage cables also include bus tie cables connecting the bus tie cabinets of the two medium-voltage power distribution equipment 28.

[0085] Specifically, the method for laying the bus tie cable includes: connecting one end of the bus tie cable to the bus tie cabinet of the medium-voltage power distribution equipment 28 in one of the medium-voltage power distribution compartments 3, and passing the other end of the bus tie cable sequentially through the medium-voltage cable compartment 6 below the medium-voltage power distribution compartment 3, the cable duct 10 on the second floor, and the medium-voltage cable compartment 6 below the other medium-voltage power distribution compartment 3, and finally through to the other medium-voltage power distribution compartment 3, and connecting it to the bus tie cabinet of the medium-voltage power distribution equipment 28 in the other medium-voltage power distribution compartment 3.

[0086] If at least one auxiliary production compartment is configured as a station substation 16, the medium-voltage cable also includes a station incoming cable connecting the medium-voltage power distribution equipment 28 in the medium-voltage power distribution compartment 3 and the medium-voltage side of the station transformer 34 in the station substation 16.

[0087] like Figure 2 As shown, in this embodiment, two auxiliary production compartments are set as station substations 16. The two station substations 16 are respectively set as two medium-voltage distribution compartments 3. The medium-voltage cable also includes the station incoming cable connecting the medium-voltage side of the station transformer 34 in the station substation 16 to the medium-voltage power distribution equipment 28 in the corresponding medium-voltage distribution compartment 3.

[0088] Specifically, in this embodiment, each of the station substations 16 is arranged adjacent to the medium-voltage cable compartment 6 below the corresponding medium-voltage distribution compartment 3. The method for laying the station incoming cable includes: one end of the station incoming cable is connected to the medium-voltage side of the station transformer 34 in the station substation 16, and the other end of the station incoming cable passes through the adjacent medium-voltage cable compartment 6, then passes upward into the corresponding medium-voltage distribution compartment, and is connected to the medium-voltage power distribution equipment 28 in the corresponding medium-voltage distribution compartment 3.

[0089] The height of each cable interlayer 8 should be determined based on the minimum turning radius of each type of cable laid therein, so as to ensure that each type of cable can be laid normally in the cable interlayer 8; the depth of the cable channel 10 should also be determined based on the minimum turning radius of each type of cable laid therein, so as to ensure that each type of cable can be laid normally in the cable channel 10.

[0090] Preferably, in this embodiment, if only low-voltage cables and control cables are laid in any cable interlayer 8, the layer height of the cable interlayer 8 shall be not less than 0.6 meters.

[0091] If a medium-voltage cable is laid in any cable interlayer 8, the height of the cable interlayer 8 shall be not less than 1.2 meters.

[0092] The cable tunnel 10 includes a low-voltage section where only low-voltage cables and control cables are laid, and a medium-voltage section where medium-voltage cables are laid. The depth of the low-voltage section is not less than 0.6 meters, and the depth of the medium-voltage section is not less than 1.2 meters.

[0093] Among them, such as Figure 6 As shown, at least one first inspection port is provided on the floor of each auxiliary production compartment. Figure 6 The example only shows the first inspection port in the station power distribution room 14. The first inspection ports in other auxiliary production compartments are set up in a similar way to the first inspection port in the station power distribution room 14, so that operators can enter the corresponding cable interlayer 8 through the first inspection port in the auxiliary production compartment to carry out maintenance work; each first inspection port is equipped with a first inspection cover plate 30.

[0094] By setting up the first inspection port, it is convenient for operators to enter each cable interlayer 8 to carry out operation and maintenance work.

[0095] Among them, such as Figures 2 to 5 As shown, multiple second maintenance ports are installed on the floor 9 of the maintenance and repair passage in each layer of the upper module. Figure 2 and Figure 3 (Only a portion of the second inspection ports are shown in the image), allowing maintenance personnel to enter the cable trays 10 on the same floor through the second inspection ports on the floor 9 of the maintenance and repair passage for maintenance work; each second inspection port is equipped with a second inspection cover 31.

[0096] By setting up a second inspection port, it is possible for operators to easily enter the cable trays 10 on each floor to carry out maintenance and repair work.

[0097] Among them, such as Figure 7 and Figure 8 As shown, multiple layers of first cable supports 32 are provided on each side of the cable interlayer 8 from top to bottom.

[0098] Among them, such as Figure 4 and Figure 5 As shown, multiple layers of second cable supports 33 are installed on both sides of the cable clamp 10 from top to bottom.

[0099] In order to further utilize the spare space in the high-voltage cable compartment 7 and the medium-voltage cable compartment 6, in this embodiment, at least one auxiliary production compartment is arranged using the spare space in the high-voltage cable compartment 7; and at least one auxiliary production compartment is arranged using the spare space in the medium-voltage cable compartment 6.

[0100] The narrowest point of the high-voltage cable compartment 7 shall be no less than 3.5 meters wide, and the narrowest point of the medium-voltage cable compartment 6 shall be no less than 2.5 meters wide.

[0101] Specifically, in this embodiment, two battery rooms 18 are arranged using the spare space in the two medium-voltage cable compartments 6, a rest and refuge room 20 is arranged using the spare space in one of the high-voltage cable compartments 7, and the spare space in the other high-voltage cable compartment 7 is used as part of the space for the relay protection room 13.

[0102] Because if the space below the high-voltage distribution compartment 4 is used entirely to house the high-voltage cable compartment 7, and the space below the medium-voltage distribution compartment 3 is used entirely to house the medium-voltage cable compartment 6, a large amount of spare space will be created in both the high-voltage cable compartment 7 and the medium-voltage cable compartment 6.

[0103] By utilizing the spare space in the high-voltage cable compartment 7 to arrange at least one auxiliary production compartment, and utilizing the spare space in the medium-voltage cable compartment 6 to arrange at least one auxiliary production compartment, the space below the high-voltage power distribution compartment 4 and the spare space below the medium-voltage power distribution compartment 3 can be utilized more fully, thereby improving the space utilization rate of the offshore substation, further reducing the platform area of ​​the offshore substation, and lowering the construction cost of the offshore substation.

[0104] The cable arrangement method for offshore substations provided by this invention has at least the following technical effects or advantages:

[0105] 1. By arranging a medium-voltage cable compartment 6 below the medium-voltage distribution compartment 3 in the upper module to form the incoming path of the submarine collection cable 1, and arranging a high-voltage cable compartment 7 below the high-voltage distribution compartment 4 to form the outgoing path of the submarine transmission cable 2; the submarine collection cable 1 can pass upward through the conduit 12 of the coastal substation into the medium-voltage cable compartment 6, and then continue upward into the medium-voltage distribution compartment 3, connecting to the medium-voltage distribution equipment 28 within the medium-voltage distribution compartment 3; and the submarine transmission cable 2 can pass upward through the conduit 12 of the coastal substation into the high-voltage cable compartment 7, and then continue upward into the high-voltage distribution compartment 4, connecting to the high-voltage distribution equipment 25 within the high-voltage distribution compartment 4; and by arranging the medium-voltage cable compartment 6... The high-voltage cable compartment 7, cable shaft 11, cable mezzanines 8, and cable channels 10 on each floor together form the cable pathways between the compartments of the offshore substation for laying low-voltage and control cables. The cable mezzanines 8 and cable channels 10 are arranged using the extra space in the upper module along the floor height, and the medium-voltage cable compartment 6 and high-voltage cable compartment 7 are used as laying channels for low-voltage and control cables. This improves the space utilization of the cable pathways and allows for differentiated arrangements of high-voltage, medium-voltage, and other cables (low-voltage and control cables). This helps reduce the area of ​​the offshore substation platform, saves cable laying space, and reduces cable length and construction workload. This solves the problem in existing offshore substation cable layout methods that lack optimization of low-voltage and control cable channels, easily leading to unnecessary increases in the length of low-voltage and control cables, increased space occupied by cable laying, increased cable construction workload, and increased construction costs for offshore substations.

[0106] 2. Since the low-voltage cables between the various compartments of the offshore substation are mainly low-voltage cables between the substation power distribution room 14 and other auxiliary production compartments, and the control cables between the various compartments of the offshore substation are mainly control cables and / or control optical cables between the relay protection room 13 and other auxiliary production compartments; therefore, arranging both the substation power distribution room 14 and the relay protection room 13 in adjacent cable shafts 11 can avoid unnecessary back-and-forth interlacing of low-voltage cables between the substation power distribution room 14 and other auxiliary production compartments on different floors in the planar direction when connecting low-voltage cables, effectively reducing the total length of the cables; it can also avoid unnecessary back-and-forth interlacing of control cables and / or control optical cables between the relay protection room 13 and other auxiliary production compartments on different floors in the planar direction when connecting control cables and / or control optical cables, effectively controlling the total length of the cables and / or control optical cables.

[0107] 3. By setting up the first inspection port, it is convenient for operators to enter each cable interlayer 8 to carry out operation and maintenance work.

[0108] 4. By setting up a second inspection port, it is possible for operators to easily enter the cable trays 10 on each floor to carry out maintenance and repair work.

[0109] 5. When the space below the high-voltage distribution compartment 4 is used entirely to house the high-voltage cable compartment 7, and the space below the medium-voltage distribution compartment 3 is used entirely to house the medium-voltage cable compartment 6, a large amount of spare space will be created in both the high-voltage cable compartment 7 and the medium-voltage cable compartment 6.

[0110] By utilizing the spare space in the high-voltage cable compartment 7 to arrange at least one auxiliary production compartment, and utilizing the spare space in the medium-voltage cable compartment 6 to arrange at least one auxiliary production compartment, the space below the high-voltage power distribution compartment 4 and the spare space below the medium-voltage power distribution compartment 3 can be utilized more fully, thereby improving the space utilization rate of the offshore substation, further reducing the platform area of ​​the offshore substation, and lowering the construction cost of the offshore substation.

[0111] The above are merely specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. All technical solutions formed by equivalent transformation or equivalent substitution fall within the scope of protection of the present invention.

Claims

1. A cable arrangement method for an offshore substation, characterized in that, It includes cable channels for arranging offshore substations, the cable channels for offshore substations including the incoming path of the submarine collection line cable, the outgoing path of the submarine transmission cable, and the cable channels between the various compartments of the offshore substation. The cable channel arrangement method includes: arranging the medium-voltage power distribution compartment and the high-voltage power distribution compartment on the second floor of the upper module of the offshore booster station; arranging the main transformer compartment, which occupies two floors, on the first floor of the upper module; arranging the medium-voltage cable compartment below the medium-voltage power distribution compartment on the first floor of the upper module to form the incoming path of the submarine cable for the power collection line; and arranging the high-voltage cable compartment below the high-voltage power distribution compartment to form the outgoing path of the submarine transmission cable. Cable interlayers are arranged at the bottom of each auxiliary production compartment in the upper module; cable channels are arranged below the maintenance and repair passages of each layer in the upper module, so that the cable interlayers at the bottom of the auxiliary production compartments in each layer of the upper module are connected to the cable channels of the same layer, and the medium-voltage cable compartment, the main transformer compartment and the high-voltage cable compartment are connected to the cable channels of the second layer. Cable shafts are arranged in the upper module to connect the cable channels of each layer; the medium-voltage cable compartment, the high-voltage cable compartment, the cable shafts, each cable layer, and the cable channels of each layer together form the cable path between the compartments of the offshore substation; the cable path can be used to lay low-voltage cables and control cables between the compartments of the offshore substation. One of the auxiliary production compartments is configured as a station power distribution room, and the low-voltage cables between the compartments of the offshore booster station include the low-voltage cables between the station power distribution room and the other auxiliary production compartments. One of the auxiliary production compartments is designated as a relay protection room, and the control cables between the compartments of the offshore booster station include control cables and / or control optical cables between the relay protection room and the other auxiliary production compartments. The station's power distribution room and relay protection room are both located in the vicinity of the cable shaft.

2. The cable arrangement method for an offshore substation according to claim 1, characterized in that: The auxiliary production compartments include a relay protection room, a station power distribution room, an emergency power distribution room, a station substation, a grounding resistor cabinet room, a battery room, a fire-fighting equipment room, a rest and refuge room, a power supply room, an emergency diesel engine room, a ventilation fan room, and a spare parts room or tool room.

3. The cable arrangement method for an offshore substation according to claim 1, characterized in that: The cable path can also be used to lay high-voltage cables between the various compartments of the offshore substation. The high-voltage cable includes a high-voltage cable connecting the high-voltage power distribution equipment in the high-voltage power distribution compartment to the high-voltage side of the main transformer in the corresponding main transformer compartment.

4. The cable arrangement method for an offshore substation according to claim 3, characterized in that: The method for laying the high-voltage cable includes: one end of the high-voltage cable is connected to the high-voltage power distribution equipment in the high-voltage power distribution compartment, and the other end of the high-voltage cable passes through the high-voltage cable compartment and the cable channel on the second floor in sequence, and then passes into the corresponding main transformer compartment and is connected to the high-voltage side of the main transformer in the main transformer compartment.

5. The cable arrangement method for an offshore substation according to claim 3, characterized in that: If the high-voltage cable compartment below the high-voltage power distribution compartment is located adjacent to the corresponding main transformer compartment; The method for laying the high-voltage cable includes: one end of the high-voltage cable is connected to the high-voltage power distribution equipment in the high-voltage power distribution compartment, and the other end of the high-voltage cable is passed through the high-voltage cable compartment and then directly passed into the corresponding main transformer compartment, and connected to the high-voltage side of the main transformer in the main transformer compartment.

6. The cable arrangement method for an offshore substation according to claim 1, characterized in that: The cable path can also be used to lay medium-voltage cables between the various compartments of the offshore substation. The medium-voltage cable includes a medium-voltage cable connecting the medium-voltage power distribution equipment in the medium-voltage power distribution compartment to the medium-voltage side of the main transformer in the corresponding main transformer compartment.

7. The cable arrangement method for an offshore substation according to claim 6, characterized in that: The method for laying the medium-voltage cable includes: one end of the medium-voltage cable is connected to the medium-voltage power distribution equipment in the medium-voltage power distribution compartment, and the other end of the medium-voltage cable passes through the medium-voltage cable compartment and the cable tunnel on the second floor in sequence, and then passes into the corresponding main transformer compartment and is connected to the medium-voltage side of the main transformer in the main transformer compartment.

8. The cable arrangement method for an offshore substation according to claim 6, characterized in that: If the medium-voltage cable compartment below the medium-voltage power distribution compartment is located adjacent to the corresponding main transformer compartment; The method for laying the medium-voltage cable includes: one end of the medium-voltage cable is connected to the medium-voltage power distribution equipment in the medium-voltage power distribution compartment, and the other end of the medium-voltage cable is passed through the medium-voltage cable compartment and then directly passed into the corresponding main transformer compartment, and connected to the medium-voltage side of the main transformer in the main transformer compartment.

9. The cable arrangement method for an offshore substation according to claim 6, characterized in that: If the upper module has multiple medium-voltage power distribution compartments on its second floor, the medium-voltage cables also include bus tie cables connecting the bus tie cabinets of each medium-voltage power distribution device.

10. The cable arrangement method for an offshore substation according to claim 6, characterized in that: If any of the cable interlayers contains only the low-voltage cable and the control cable, then the height of the cable interlayer shall be not less than 0.6 meters. If the medium-voltage cable is laid in any of the cable interlayers, the height of the cable interlayer shall be not less than 1.2 meters. The cable tunnel includes a low-voltage section where only the low-voltage cable and the control cable are laid, and a medium-voltage section where the medium-voltage cable is laid. The depth of the low-voltage section is not less than 0.6 meters, and the depth of the medium-voltage section is not less than 1.2 meters.

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