Single-layer platform double-layer structure offshore booster station and accident oil tank configuration method thereof

Abstract

The invention relates to the field of new energy and power systems, in particular to an offshore booster station with a single-layer platform and a double-layer structure and an accident oil tank configuration method thereof.The offshore booster station with the single-layer platform and the double-layer structure comprises a base at the bottom and an upper module fixed to the base, and the upper module comprises a platform fixedly installed on the base; the at least three first prefabricated cabin units are fixedly mounted on the platform; the upper surface of the platform is divided into a first mounting area and a second mounting area, the first mounting area is used for fixedly mounting the first prefabricated cabin unit, and the second mounting area is used for mounting a main transformer and a matched radiator; each first prefabricated cabin unit comprises a first prefabricated cabin and a plurality of second prefabricated cabins internally provided with functional equipment, and the second prefabricated cabins are adjacently arranged and used for jointly supporting the first prefabricated cabins; wherein two first prefabricated cabins are respectively a relay protection cabin and a high-voltage power distribution cabin, and the rest first prefabricated cabins are medium-voltage power distribution cabins.

Description

Technical Field

[0001] The present invention relates to the field of new energy and power systems, and in particular to a single-layer platform double-layer structure offshore booster station and a method for configuring an emergency oil tank thereof. Background Art

[0002] The construction of offshore wind farms facilitates the full utilization of offshore wind resources, establishing an efficient means of utilizing natural resources. However, compared to onshore wind farms, they also have higher construction costs, increasing the purchase and operating costs of wind turbine equipment. With the development and application of offshore wind power technology, offshore wind farms are becoming larger and more located in deep waters. Therefore, reducing development costs has become a key measure for the sustainable development of offshore wind power. As the hub of offshore wind farms, offshore substations are costly and complex to construct. Therefore, optimizing their layout and reducing their costs are of great significance to the development of offshore wind power.

[0003] Offshore booster stations mostly adopt a multi-layer platform structure (mainly including double-layer platforms and three-layer platforms). In terms of construction methods, they are mainly divided into two types: integral offshore booster stations in which the platform and functional cabins are built together at sea, and combined offshore booster stations in which the platform and functional cabins (prefabricated cabins) are built separately and then the functional cabins (prefabricated cabins) are assembled onto the platform. At present, since the construction and commissioning of the functional cabins of the combined offshore booster stations can be completed in the factory, the separate construction of the platform and functional cabins is realized, which makes the combined offshore booster stations more effective in reducing the construction period and cost of offshore booster stations compared to the integral offshore booster stations.

[0004] At present, modular offshore booster stations usually adopt a structural form of stacking double-layer functional cabins (prefabricated cabins) on a double-layer platform (the lower platform also serves as a cable mezzanine, and the upper platform is used to install functional cabins) (also known as a double-layer platform three-layer layout structure). In terms of the number of platform layers, the modular offshore booster station still has room for optimization in terms of platform volume. In addition, the functional cabins of the existing modular offshore booster stations are all built independently, and there is a lack of consideration for the load-bearing capacity of the lower functional cabin after stacking. As a result, during the stacking installation and subsequent commissioning of the existing modular offshore booster stations, it is often impossible to rely solely on the frame of the lower functional cabin to stably support the upper functional cabin, which can easily cause the structure of the functional cabin to deform and damage, thereby damaging the functional equipment in the functional cabin and increasing maintenance costs. Setting up additional beam-column structures to provide auxiliary support for the upper functional cabin will also increase construction costs and construction periods. Summary of the Invention

[0005] In order to solve the defects of the above-mentioned prior art, the present invention provides a single-platform double-layer structure offshore booster station and its accident oil tank configuration method. Based on the inventive idea of ​​using multiple small functional cabins to support large functional cabins, the density of the frame supporting the lower part of the upper functional cabin is increased, so that the frame of the lower functional cabin can stably support the upper functional cabin. Applying it to a combined offshore booster station can better solve the above-mentioned problems.

[0006] The technical solution adopted by the present invention is: a single-layer platform double-layer structure offshore booster station, comprising a bottom foundation, an upper assembly fixed on the foundation, the upper assembly comprising a single-layer platform fixedly mounted on the foundation, and at least three first prefabricated cabin units fixedly mounted on the single-layer platform; The upper surface of the platform is divided into a first installation area and a second installation area. The first installation area is used for fixedly installing the first prefabricated cabin unit, and the second installation area is used for installing the main transformer and the corresponding radiator. Each of the first prefabricated cabin units includes a first prefabricated cabin and multiple second prefabricated cabins containing functional equipment. The second prefabricated cabins are arranged adjacent to each other and are used to jointly support the first prefabricated cabin. Two of the first prefabricated cabins are a relay cabin and a high-voltage distribution cabin, and the remaining first prefabricated cabin is a medium-voltage distribution cabin.

[0007] By using a plurality of adjacently arranged second prefabricated cabins (small prefabricated cabins) to jointly support the first prefabricated cabin (large prefabricated cabin), the density of the frame supporting the first prefabricated cabin can be effectively increased, so that the upper functional cabin (the first prefabricated cabin) can be stably supported by the frame of the lower functional cabin (each second prefabricated cabin), thereby protecting the structures of the first prefabricated cabin and each second prefabricated cabin from deformation and damage, thereby protecting the functional equipment in the cabin. There is no need to set up additional beam-column structures to provide auxiliary support for the upper functional cabin (the first prefabricated cabin), which can effectively reduce maintenance costs and construction costs and shorten the construction period.

[0008] In an offshore substation, the cabins that occupy a larger area usually include a relay cabin, a high-voltage distribution cabin and at least one medium-voltage distribution cabin (usually the number of medium-voltage distribution cabins is consistent with the number of main transformers in the offshore substation). It is only necessary to determine the number of the first prefabricated cabin units based on the total number of relay cabins, high-voltage distribution cabins and medium-voltage distribution cabins, and configure two of the second prefabricated cabins as relay cabins and high-voltage distribution cabins respectively, and configure the remaining second prefabricated cabins as medium-voltage distribution cabins; this can ensure that all large cabins in the offshore substation can be set in the corresponding first prefabricated cabins (large prefabricated cabins).

[0009] At the same time, it is only necessary to configure any of the second prefabricated cabins below the first prefabricated cabin configured as a high-voltage distribution cabin as a high-voltage cable mezzanine cabin for laying submarine transmission cables, and to configure any of the second prefabricated cabins below the first prefabricated cabin configured as a medium-voltage distribution cabin as a medium-voltage cable mezzanine cabin for laying collector line submarine cables, so as to form an incoming line channel for the medium-voltage distribution cabin and an outgoing line channel for the high-voltage distribution cabin; so that the single-layer platform double-layer structure offshore substation provided by the present invention does not need to be additionally provided with a separate cable mezzanine (no longer needs to be set up as a double-layer platform), which saves one layer of platform, optimizes the platform volume of the offshore substation, further reduces the construction cost of the offshore substation, and shortens the construction period.

[0010] The single-layer platform double-layer structure offshore booster station provided by the present invention simplifies the structure of the offshore booster station, reduces the amount of structural steel, shortens the construction period, and reduces construction costs by proposing a single-layer platform double-layer layout structure with a small cabin at the bottom and a large cabin at the top, which is aligned up and down.

[0011] In the single-layer platform double-layer structure offshore substation provided by the present invention, the main transformer and the associated radiator are arranged outdoors (the main transformer and the radiator are both arranged in the open air on the second installation area), which can effectively improve the heat dissipation efficiency of the main transformer, eliminate the outfitting structure of the main transformer room, reduce the wind load on the offshore substation, and contribute to the compact and lightweight design of the offshore substation.

[0012] Furthermore, the number of the medium-voltage distribution compartments is equal to the number of the main transformers installed in the second installation area.

[0013] Furthermore, the first installation area includes a first sub-area and a second sub-area; The first sub-area, the second installation area and the second sub-area are arranged in sequence along a first horizontal direction, the first horizontal direction is the length direction or width direction of the platform, and at least one first prefabricated cabin unit is installed on the first sub-area and the second sub-area.

[0014] By arranging the first sub-area, the second installation area and the second sub-area in sequence along the first horizontal direction, the single-layer platform double-layer structure offshore substation provided by the present invention has an overall centrally symmetrical arrangement structure (the main transformer is in the center, and the first prefabricated cabin units are symmetrically arranged on both sides of the main transformer), which can effectively improve the space utilization of the offshore substation.

[0015] Furthermore, when multiple first prefabricated cabin units are installed on the first sub-area, the multiple first prefabricated cabin units installed on the first sub-area are arranged in sequence along a second horizontal direction perpendicular to the first horizontal direction; when multiple first prefabricated cabin units are installed on the second sub-area, the multiple first prefabricated cabin units installed on the second sub-area are arranged in sequence along the second horizontal direction.

[0016] By arranging the multiple first prefabricated cabin units installed in the first sub-area and the multiple first prefabricated cabin units installed in the second sub-area in sequence along the second horizontal direction, the overall structure of the single-layer platform double-layer structure offshore substation provided by the present invention is made more compact, which not only improves the space utilization rate of the offshore substation, but also improves the stability of the offshore substation.

[0017] Furthermore, the second installation area includes a third sub-area, a fourth sub-area and a fifth sub-area sequentially arranged along the second horizontal direction; The fourth sub-area is used for installing the main transformer, and the third sub-area and the fifth sub-area are used for installing the radiator.

[0018] By installing the main transformer in the fourth sub-area located in the center and installing the radiator in the fourth sub-area and / or the fifth sub-area located on both sides, in the single-layer platform double-layer structure offshore substation provided by the present invention, each of the first prefabricated cabin units and the radiator are arranged around the transformer, the overall structure is more compact, and the space utilization is further improved.

[0019] Furthermore, if a plurality of the main transformers are installed on the four sub-areas, the main transformers are arranged in sequence along the second horizontal direction.

[0020] Furthermore, a first prefabricated cabin unit including the medium voltage distribution cabin is arranged adjacent to the second installation area; One of the second prefabricated cabins below the medium-voltage distribution cabin is a medium-voltage cable mezzanine cabin, which is used to lay the collector line submarine cable; the collector line submarine cable can be led upward along the foundation to the medium-voltage cable mezzanine cabin, and then continue to be led upward to the medium-voltage distribution equipment in the medium-voltage distribution cabin above.

[0021] By arranging the first prefabricated cabin unit containing the medium-voltage distribution cabin near the second installation area, the medium-voltage line having one end connected to the medium-voltage distribution equipment in the medium-voltage distribution cabin can directly pass through the side of the medium-voltage distribution cabin close to the second installation area to the second installation area and be connected to the medium-voltage side of the corresponding main transformer in the second installation area, thereby reducing the laying length of the medium-voltage line and reducing the amount of cable used in the medium-voltage line.

[0022] Furthermore, the medium-voltage cable mezzanine cabin is arranged adjacent to the second installation area, and the medium-voltage cable mezzanine cabin is also used to lay medium-voltage lines; so that the medium-voltage line connected to the medium-voltage distribution equipment in the medium-voltage distribution cabin at one end can be led downward to the medium-voltage cable mezzanine cabin below, and then pass through the second installation area and be connected to the medium-voltage side of the main transformer.

[0023] By arranging the medium-voltage cable mezzanine cabin adjacent to the second installation area, and allowing the medium-voltage line connected to the medium-voltage distribution equipment in the medium-voltage distribution cabin at one end to be led downward to the medium-voltage cable mezzanine cabin below, and then pass through the second installation area and be connected to the medium-voltage side of the main transformer, the overhead height of the medium-voltage line in the second installation area can be reduced, which can facilitate the subsequent operation, maintenance and repair work.

[0024] Furthermore, a first prefabricated cabin unit including the high-voltage distribution cabin is arranged adjacent to the second installation area; One of the second prefabricated cabins below the high-voltage distribution cabin is a high-voltage cable mezzanine cabin, which is used to lay submarine delivery cables; the submarine delivery cables can be led upward along the foundation to the high-voltage cable mezzanine cabin, and then continue to be led upward to the high-voltage distribution equipment in the high-voltage distribution cabin above.

[0025] By arranging the first prefabricated cabin unit containing the high-voltage distribution cabin near the second installation area, the high-voltage line with one end connected to the high-voltage distribution equipment in the high-voltage distribution cabin can directly pass through the side of the high-voltage distribution cabin close to the second installation area to the second installation area and be connected to the high-voltage side of the corresponding main transformer in the second installation area, thereby reducing the laying length of the high-voltage line and reducing the amount of cable used in the high-voltage line.

[0026] Furthermore, the high-voltage cable mezzanine compartment is arranged adjacent to the second installation area, and the high-voltage cable mezzanine compartment is also used to lay high-voltage lines; so that the high-voltage line connected to the high-voltage distribution equipment in the high-voltage distribution compartment at one end can be led downward to the high-voltage cable mezzanine compartment below, and then pass through the second installation area and be connected to the high-voltage side of the main transformer.

[0027] By arranging the high-voltage cable mezzanine cabin adjacent to the second installation area, and allowing the high-voltage line connected to the high-voltage distribution equipment in the high-voltage distribution cabin at one end to be led downward to the high-voltage cable mezzanine cabin below, and then pass through the second installation area and be connected to the high-voltage side of the main transformer, the overhead height of the high-voltage line in the second installation area can be reduced, which can facilitate the subsequent operation and maintenance work.

[0028] Furthermore, except for the second prefabricated cabin set as the medium-voltage cable mezzanine cabin and the second prefabricated cabin set as the high-voltage cable mezzanine cabin, the remaining second prefabricated cabins are station substation cabins or grounding resistor cabinet cabins or tool cabins or spare parts cabins or battery cabins or fire-fighting equipment cabins or rest and refuge cabins or ventilator cabins or station distribution cabins or emergency distribution cabins.

[0029] Furthermore, the upper assembly block further includes at least one second prefabricated cabin unit fixedly mounted on the first mounting area; The second prefabricated cabin unit includes a plurality of third prefabricated cabins containing functional equipment and a plurality of fourth prefabricated cabins containing functional equipment. Each of the third prefabricated cabins is fixedly installed on the first installation area and arranged adjacent to each other, and each of the fourth prefabricated cabins is fixedly installed above each of the third prefabricated cabins and arranged adjacent to each other.

[0030] By providing the second prefabricated cabin unit, the single-layer platform double-layer structure offshore booster station provided by the present invention can have more small prefabricated cabins for configuring various functional cabins of the offshore booster station, thereby improving the flexibility of the functional cabin layout.

[0031] Furthermore, two of the fourth prefabricated compartments are an emergency diesel engine compartment and an oil storage tank compartment respectively.

[0032] By configuring two of the fourth prefabricated cabins as the emergency diesel engine cabin and the oil storage tank cabin respectively, the configuration of the emergency diesel engine cabin and the oil storage tank cabin can meet the specification requirements for being arranged in the upper cabin.

[0033] Furthermore, the foundation includes four main leg columns arranged in a rectangular array, and the platform is fixedly mounted on the four main leg columns.

[0034] The single-layer platform double-layer structure offshore booster station also includes an emergency oil pipeline and an emergency oil tank fixedly installed on the main leg column, and at most one emergency oil tank is arranged on any one of the main leg columns.

[0035] By making the accident oil pools of the single-layer platform double-layer structure offshore booster station provided by the present invention adopt a layout method in which multiple accident oil pools are dispersedly arranged on each of the main leg columns, it is possible to balance the loads of each of the main leg columns of the offshore booster station by adjusting the volume of each accident oil tank, thereby reducing the cost of the foundation. At the same time, the layout method of adopting multiple accident oil pools has the advantage of smaller mass than the layout method of a single accident oil pool, and can reduce the amount of steel used in the accident oil pool structure.

[0036] Based on the single-layer platform double-layer structure offshore booster station provided by the present invention, the present invention also provides an emergency oil tank configuration method for the single-layer platform double-layer structure offshore booster station, the emergency oil tank configuration method comprising: A spatial coordinate system is constructed with the geometric center of the foundation of the single-layer platform double-layer structure offshore booster station as the origin, where the plane constructed by the X-axis and Y-axis is parallel to the sea level, and the Z-axis is perpendicular to the sea level; An emergency oil tank is fixedly installed on each of the four supporting legs of the foundation of the single-layer platform double-layer structure offshore booster station; Acquiring first design parameter information of the accident oil tank, where the first design parameter information includes empty masses corresponding to accident oil tanks of different volumes; Based on the second design parameter information and the constraint condition, a plurality of different design capacity configuration schemes for the four emergency oil tanks are obtained, wherein the design capacity configuration schemes include the volumes and corresponding empty masses of the four emergency oil tanks; Constructing a centroid calculation model for the single-layer platform double-layer structure offshore booster station in the spatial coordinate system, using the second design parameter information of the single-layer platform double-layer structure offshore booster station and each of the design capacity configuration schemes as inputs to the centroid calculation model, and calculating the superimposed centroid coordinates of the accident oil tank corresponding to each of the design capacity configuration schemes and the upper block of the single-layer platform double-layer structure offshore booster station by the centroid calculation model; Establishing an accident oil tank configuration model with the optimization goal of minimizing the deviation between the superposition centroid coordinates and the geometric center of the foundation; The obtained design capacity configuration schemes and the superimposed centroid coordinates corresponding to the design capacity configuration schemes are used as inputs of the accident oil tank configuration model, and the accident oil tank configuration model calculates the optimal configuration scheme of the four accident oil tanks.

[0037] By designing the capacity of each accident oil tank based on the deviation between the superimposed center of mass of the upper block and each accident oil tank and the geometric center of the foundation, the loads of each main leg column can be better balanced, thereby reducing the cost of the foundation.

[0038] Furthermore, the accident tank configuration model is constructed based on the offset value objective function; The offset value objective function is expressed as: Among them, x n y is the coordinate value of the superposition center of mass coordinate on the X axis of the space coordinate system; n z is the coordinate value of the superposition centroid coordinate on the Y axis of the spatial coordinate system; n is the coordinate value of the superimposed mass center coordinate on the Z axis of the spatial coordinate system; V1 is the volume of the accident oil tank installed on the first said leg column; V2 is the volume of the accident oil tank installed on the second said leg column; V3 is the volume of the accident oil tank installed on the third said leg column; V4 is the volume of the accident oil tank installed on the fourth said leg column; V i is the volume of the accident oil tank installed on the i-th support leg column; λ1 is the first weighting coefficient; λ2 is the second weighting coefficient.

[0039] Furthermore, the method of calculating the superposition centroid coordinates corresponding to each of the design capacity configuration schemes using the centroid calculation model includes: The centroid calculation model calculates the mass information and first centroid coordinate information of the upper block and the second centroid coordinate information of each of the accident oil tanks according to the input second design parameter information; The centroid calculation model calculates the superimposed centroid coordinates corresponding to the design capacity configuration scheme based on the obtained quality information, the first centroid coordinate information and the second centroid coordinate information, and any input design capacity configuration scheme.

[0040] Furthermore, the superposition centroid coordinates corresponding to any of the design capacity configuration schemes are calculated using the following formula: Among them, x n ,y n , z nare the coordinates of the superimposed centroid coordinates corresponding to any of the design capacity configuration schemes in the spatial coordinate system; x0, y0, z0 are the coordinates of the centroid of the upper block in the spatial coordinate system; x1, y1, z1 are the coordinates of the centroid of the accident oil tank installed on the first leg column in the design capacity configuration scheme in the spatial coordinate system; x2, y2, z2 are the coordinates of the centroid of the accident oil tank installed on the second leg column in the design capacity configuration scheme in the spatial coordinate system; x3, y3, z3 are the coordinates of the centroid of the accident oil tank installed on the third leg column in the design capacity configuration scheme. The coordinates of the center of mass of the tank in the spatial coordinate system; x4, y4, z4 are the coordinates of the center of mass of the accident oil tank installed on the fourth leg column in the design capacity configuration scheme in the spatial coordinate system; V1 is the volume of the accident oil tank installed on the first leg column in the design capacity configuration scheme; V2 is the volume of the accident oil tank installed on the second leg column in the design capacity configuration scheme; V3 is the volume of the accident oil tank installed on the third leg column in the design capacity configuration scheme; V4 is the volume of the accident oil tank installed on the fourth leg column in the design capacity configuration scheme; m T is the mass of the upper assembly; m1 is the no-load mass of the accident oil tank installed on the first said support leg column in the said design capacity configuration scheme; m2 is the no-load mass of the accident oil tank installed on the second said support leg column in the said design capacity configuration scheme; m3 is the no-load mass of the accident oil tank installed on the third said support leg column in the said design capacity configuration scheme; m4 is the no-load mass of the accident oil tank installed on the fourth said support leg column in the said design capacity configuration scheme; ρ is the density of transformer oil.

[0041] Furthermore, the constraints are: Wherein, V1 is the volume of the emergency oil tank installed on the first support leg column in any of the design capacity configuration schemes; V2 is the volume of the emergency oil tank installed on the second support leg column in the design capacity configuration scheme; V3 is the volume of the emergency oil tank installed on the third support leg column in the design capacity configuration scheme; V4 is the volume of the emergency oil tank installed on the fourth support leg column in the design capacity configuration scheme; V Tis the total volume of transformer oil in the main transformer installed on the second installation area of ​​the platform of the upper assembly; m1 is the no-load mass of the emergency oil tank installed on the first support leg in the design capacity configuration scheme; m2 is the no-load mass of the emergency oil tank installed on the second support leg in the design capacity configuration scheme; m3 is the no-load mass of the emergency oil tank installed on the third support leg in the design capacity configuration scheme; m4 is the no-load mass of the emergency oil tank installed on the fourth support leg in the design capacity configuration scheme. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a structural diagram of the single-layer platform double-layer offshore booster station in Example 1; Figure 2 This is a schematic diagram of the layout structure of the platform, main transformer, radiator and lower functional cabin of the single-layer platform double-layer structure offshore substation in Example 1; Figure 3 This is a schematic diagram of the layout structure of the upper functional cabin of the single-deck platform double-deck offshore booster station in Example 1; Among them, 1-platform, 2-main transformer, 3-radiator, 4-relay protection compartment, 5-high-voltage distribution compartment, 6-medium-voltage distribution compartment, 7-medium-voltage cable mezzanine compartment, 8-collector line submarine cable, 9-medium-voltage distribution equipment, 10-medium-voltage line, 11-high-voltage cable mezzanine compartment, 12-submarine transmission cable, 13-high-voltage distribution equipment, 14-high-voltage line, 15-station transformer compartment, 16-grounding resistor cabinet compartment, 17—Tool compartment, 18—Spare parts compartment, 19—Battery compartment, 20—Firefighting equipment compartment, 21—Rest and refuge compartment, 22—Ventilator compartment, 23—Station power distribution compartment, 24—Emergency power distribution compartment, 25—Emergency diesel engine compartment, 26—Oil storage tank compartment, 27—Main leg column, 28—Accident oil pipeline, 29—Accident oil tank, 30—Operation and maintenance corridor, 31—Steel stairs, 32—Cantilever crane. DETAILED DESCRIPTION

[0043] The following is a clear and complete description of the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention: Example 1: like Figures 1 to 3 As shown, this embodiment 1 provides a single-layer platform double-layer structure offshore booster station, comprising a bottom foundation, an upper assembly fixed to the foundation, the upper assembly comprising a platform 1 fixedly mounted on the foundation, and at least three first prefabricated cabin units fixedly mounted on the platform 1; The upper surface of the platform 1 is divided into a first installation area and a second installation area. The first installation area is used for fixedly installing the first prefabricated cabin unit, and the second installation area is used for installing the main transformer 2 and the corresponding radiator 3. Each first prefabricated cabin unit includes a first prefabricated cabin and multiple second prefabricated cabins containing functional equipment. The second prefabricated cabins are arranged adjacent to each other and are used to jointly support the first prefabricated cabin. Two of the first prefabricated cabins are the relay cabin 4 and the high-voltage distribution cabin 5 , and the remaining first prefabricated cabin is the medium-voltage distribution cabin 6 .

[0044] Using multiple adjacently arranged second prefabricated cabins (small prefabricated cabins) to jointly support the first prefabricated cabin (large prefabricated cabin) can effectively increase the density of the frame supporting the first prefabricated cabin, so that the upper functional cabin (first prefabricated cabin) can be stably supported by relying solely on the frame of the lower functional cabin (each second prefabricated cabin), protecting the structures of the first prefabricated cabin and each second prefabricated cabin from deformation and damage, thereby protecting the functional equipment in the cabin. There is no need to set up additional beam-column structures to provide auxiliary support for the upper functional cabin (first prefabricated cabin), which can effectively reduce maintenance costs and construction costs and shorten the construction period.

[0045] In an offshore substation, the cabins occupying a larger area usually include a relay cabin, a high-voltage distribution cabin and at least one medium-voltage distribution cabin (usually the number of medium-voltage distribution cabins 6 is consistent with the number of main transformers 2 in the offshore substation). It is only necessary to determine the number of first prefabricated cabin units based on the total number of relay cabins 4, high-voltage distribution cabins 5 and medium-voltage distribution cabins 6, and configure two of the second prefabricated cabins as relay cabins 4 and high-voltage distribution cabins 5 respectively, and configure the remaining second prefabricated cabins as medium-voltage distribution cabins 6; this can ensure that all large cabins in the offshore substation can be set in the corresponding first prefabricated cabins (large prefabricated cabins).

[0046] At the same time, it is only necessary to configure any second prefabricated cabin below the first prefabricated cabin configured as the high-voltage distribution cabin 5 as a high-voltage cable mezzanine cabin 11 for laying the submarine transmission cable 12, and to configure any second prefabricated cabin below the first prefabricated cabin configured as the medium-voltage distribution cabin 6 as a medium-voltage cable mezzanine cabin 7 for laying the collection line submarine cable 8, so as to form an incoming line channel of the medium-voltage distribution cabin 6 and an outgoing line channel of the high-voltage distribution cabin 5; so that the single-layer platform double-layer structure offshore substation provided by the present invention does not need to be additionally provided with a separate cable mezzanine (no longer needs to be set as a double-layer platform), which saves one layer of platform, optimizes the platform volume of the offshore substation, further reduces the construction cost of the offshore substation, and shortens the construction period.

[0047] The single-layer platform double-layer structure offshore booster station provided by the present invention simplifies the structure of the offshore booster station, reduces the amount of structural steel, shortens the construction period, and reduces construction costs by proposing a double-layer arrangement structure of a single-layer platform 1 with a small cabin at the bottom and a large cabin at the top, which is aligned up and down.

[0048] In the single-layer platform double-layer structure offshore substation provided by the present invention, the main transformer 2 and the matching radiator 3 are arranged outdoors (the main transformer 2 and the radiator 3 are both arranged in the open air on the second installation area), which can effectively improve the heat dissipation efficiency of the main transformer 2, eliminate the outfitting structure part of the main transformer 2 room, reduce the wind load of the offshore substation, and contribute to the compact and lightweight design of the offshore substation.

[0049] In one embodiment, the number of the medium voltage distribution compartments 6 is equal to the number of the main transformers 2 installed in the second installation area.

[0050] Specifically, such as Figure 2 As shown, in the specific example given in this embodiment 1, the single-layer platform double-layer structure offshore booster station is a double-main-transformer offshore booster station, which is provided with two main transformers 2. Therefore, the number of medium-voltage distribution compartments 6 is also two; Therefore, in this embodiment 1, as shown in FIG. Figure 2 and Figure 3 As shown, the number of first prefabricated cabin units fixedly installed on the platform 1 is four.

[0051] like Figure 2 and Figure 3 As shown, in order to further improve the space utilization of the offshore substation and make the layout of the offshore substation more compact, in this embodiment 1, some optimizations are made to the division of the first installation area and the second installation area, the arrangement of the first prefabricated cabin units fixedly installed in the first installation area, and the arrangement of the main transformer fixedly installed in the second installation area.

[0052] Wherein, the first installation area includes a first sub-area and a second sub-area; The first sub-area, the second installation area and the second sub-area are arranged in sequence along the first horizontal direction, the first horizontal direction is the length direction or width direction of the platform 1, and at least one first prefabricated cabin unit is installed on the first sub-area and the second sub-area.

[0053] By arranging the first sub-area, the second installation area and the second sub-area in sequence along the first horizontal direction, the single-layer platform double-layer structure offshore substation provided by the present invention has an overall centrally symmetrical arrangement structure (the main transformer 2 is in the center, and the first prefabricated cabin units are symmetrically arranged on both sides of the main transformer 2), which can effectively improve the space utilization of the offshore substation.

[0054] Specifically, such as Figure 2 and Figure 3 As shown, when multiple first prefabricated cabin units are installed on the first sub-area, the multiple first prefabricated cabin units installed on the first sub-area are arranged in sequence along the second horizontal direction perpendicular to the first horizontal direction; when multiple first prefabricated cabin units are installed on the second sub-area, the multiple first prefabricated cabin units installed on the second sub-area are arranged in sequence along the second horizontal direction.

[0055] By arranging the multiple first prefabricated cabin units installed in the first sub-area and the multiple first prefabricated cabin units installed in the second sub-area in sequence along the second horizontal direction, the overall structure of the single-layer platform double-layer structure offshore substation provided by the present invention is made more compact, which not only improves the space utilization rate of the offshore substation, but also improves the stability of the offshore substation.

[0056] Specifically, in this embodiment 1, Figure 2 As shown, the second installation area includes a third sub-area, a fourth sub-area and a fifth sub-area sequentially arranged along the second horizontal direction; The fourth sub-area is used for installing the main transformer 2 , and the third sub-area and the fifth sub-area are used for installing the radiator 3 .

[0057] By installing the main transformer 2 in the fourth sub-area located in the center and installing the radiator 3 in the fourth sub-area and / or the fifth sub-area located on both sides, in the single-layer platform double-layer structure offshore substation provided by the present invention, each first prefabricated cabin unit and the radiator 3 are arranged around the transformer, making the overall structure more compact and further improving space utilization.

[0058] Specifically, in this embodiment 1, Figure 2 As shown, if a plurality of main transformers 2 are installed on the four sub-areas, the main transformers 2 are arranged in sequence along the second horizontal direction.

[0059] Preferably, in this embodiment 1, Figures 1 to 3 As shown, the first prefabricated cabin unit including the medium voltage distribution cabin 6 is arranged adjacent to the second installation area; One of the second prefabricated cabins below the medium-voltage distribution cabin 6 is a medium-voltage cable mezzanine cabin 7, which is used to lay the collection line submarine cable 8; the collection line submarine cable 8 can be led upward along the foundation to the medium-voltage cable mezzanine cabin 7, and then continue to be led upward to the medium-voltage distribution equipment 9 in the medium-voltage distribution cabin 6 above.

[0060] By arranging the first prefabricated cabin unit containing the medium-voltage distribution cabin 6 near the second installation area, the medium-voltage line 10, one end of which is connected to the medium-voltage distribution equipment 9 in the medium-voltage distribution cabin 6, can directly pass through the side of the medium-voltage distribution cabin 6 close to the second installation area to the second installation area and connect to the medium-voltage side of the corresponding main transformer 2 in the second installation area, thereby reducing the laying length of the medium-voltage line 10 and the cable usage of the medium-voltage line 10.

[0061] Preferably, in this embodiment 1, Figure 1 and Figure 2 As shown, the medium-voltage cable mezzanine compartment 7 is arranged adjacent to the second installation area. The medium-voltage cable mezzanine compartment 7 is also used to lay the medium-voltage line 10; the medium-voltage line 10, one end of which is connected to the medium-voltage distribution equipment 9 in the medium-voltage distribution compartment 6, can be led downward to the medium-voltage cable mezzanine compartment 7 below, pass through the second installation area and be connected to the medium-voltage side of the main transformer 2.

[0062] By arranging the medium-voltage cable mezzanine cabin 7 adjacent to the second installation area, and allowing the medium-voltage line 10, one end of which is connected to the medium-voltage distribution equipment 9 in the medium-voltage distribution cabin 6, to be led downward to the medium-voltage cable mezzanine cabin 7 below, and then pass through the second installation area and be connected to the medium-voltage side of the main transformer 2, the overhead height of the medium-voltage line 10 in the second installation area can be reduced, which can facilitate the subsequent operation and maintenance work.

[0063] Preferably, in this embodiment 1, Figures 1 to 3 As shown, the first prefabricated cabin unit including the high-voltage distribution cabin 5 is arranged adjacent to the second installation area; One of the second prefabricated cabins below the high-voltage distribution cabin 5 is a high-voltage cable mezzanine cabin 11, which is used to lay a submarine delivery cable 12; the submarine delivery cable 12 can be led upward along the foundation to the high-voltage cable mezzanine cabin 11, and then continue to be led upward to the high-voltage distribution equipment 13 in the high-voltage distribution cabin 5 above.

[0064] By arranging the first prefabricated cabin unit containing the high-voltage distribution cabin 5 near the second installation area, the high-voltage line 14 connected to the high-voltage distribution equipment 13 in the high-voltage distribution cabin 5 at one end can directly pass through the side of the high-voltage distribution cabin 5 close to the second installation area to the second installation area and connect to the high-voltage side of the corresponding main transformer 2 in the second installation area, thereby reducing the laying length of the high-voltage line 14 and reducing the cable usage of the high-voltage line 14.

[0065] Preferably, in this embodiment 1, Figure 1 and Figure 2As shown, the high-voltage cable mezzanine compartment 11 is arranged adjacent to the second installation area, and the high-voltage cable mezzanine compartment 11 is also used to lay the high-voltage line 14; the high-voltage line 14, one end of which is connected to the high-voltage distribution equipment 13 in the high-voltage distribution compartment 5, can be led downward to the high-voltage cable mezzanine compartment 11 below, and then pass through the second installation area and be connected to the high-voltage side of the main transformer 2.

[0066] By arranging the high-voltage cable mezzanine compartment 11 adjacent to the second installation area, and allowing the high-voltage line 14, one end of which is connected to the high-voltage distribution equipment 13 in the high-voltage distribution compartment 5, to be led downward to the high-voltage cable mezzanine compartment 11 below, and then pass through the second installation area and be connected to the high-voltage side of the main transformer 2, the overhead height of the high-voltage line 14 in the second installation area can be reduced, which can facilitate the subsequent operation and maintenance work.

[0067] Preferably, in this embodiment 1, except for the second prefabricated cabin set as the medium-voltage cable mezzanine cabin 7 and the second prefabricated cabin set as the high-voltage cable mezzanine cabin 11, the remaining second prefabricated cabins are the station substation cabin 15 or the grounding resistor cabinet cabin 16 or the tool cabin 17 or the spare parts cabin 18 or the battery cabin 19 or the fire-fighting equipment cabin 20 or the rest and refuge cabin 21 or the ventilator cabin 22 or the station distribution cabin 23 or the emergency distribution cabin 24.

[0068] Specifically, in this embodiment 1, Figures 1 to 3 As shown, there are four first prefabricated cabin units, that is, four first prefabricated cabins, on the platform 1, two of which are the relay cabin 4 and the high-voltage distribution cabin 5, and the remaining two are the medium-voltage distribution cabins 6.

[0069] The two first prefabricated cabin units provided with medium-voltage distribution cabins 6 are both fixedly installed in the first sub-area, and the first prefabricated cabin unit provided with the relay cabin 4 and the first prefabricated cabin unit provided with the high-voltage distribution cabin 5 are both fixedly installed in the second sub-area; The two first prefabricated cabin units each provided with a medium-voltage distribution cabin 6 include three second prefabricated cabins, which are respectively configured as a medium-voltage cable mezzanine cabin 7, a station transformer cabin 15, and a grounding resistor cabinet cabin 16.

[0070] The first prefabricated cabin unit provided with the relay protection cabin 4 includes three second prefabricated cabins, and the three second prefabricated cabins are respectively configured as a fire-fighting equipment cabin 20 and two battery cabins 19 .

[0071] The first prefabricated cabin unit provided with the high-voltage distribution cabin 5 includes two second prefabricated cabins, and the two second prefabricated cabins are respectively configured as a high-voltage cable mezzanine cabin 11 and a ventilator cabin 22 .

[0072] In one embodiment, Figure 2 and Figure 3 As shown, the upper assembly block further includes at least one second prefabricated cabin unit fixedly mounted on the first mounting area; The second prefabricated cabin unit includes multiple third prefabricated cabins with functional equipment installed therein and multiple fourth prefabricated cabins with functional equipment installed therein. Each third prefabricated cabin is fixedly installed on the first installation area and arranged adjacent to each other, and each fourth prefabricated cabin is fixedly installed above each third prefabricated cabin and arranged adjacent to each other.

[0073] By providing a second prefabricated cabin unit, the single-layer platform double-layer structure offshore booster station provided by the present invention can have more small prefabricated cabins for configuring various functional cabins of the offshore booster station, thereby improving the flexibility of the functional cabin layout.

[0074] Specifically, in this embodiment 1, Figure 2 and Figure 3 As shown, the upper assembly block includes two second prefabricated cabin units, and the two second prefabricated cabin units are both fixedly installed in the second sub-area; The two first prefabricated cabin units installed in the second sub-area are arranged in sequence along the second horizontal direction, and the two second prefabricated cabin units installed in the second sub-area are respectively arranged on both sides of the two first prefabricated cabin units in the second horizontal direction.

[0075] Specifically, in this embodiment 1, Figure 2 and Figure 3 As shown, the two second prefabricated cabin units each include two third prefabricated cabins and two fourth prefabricated cabins.

[0076] Among them, such as Figure 2 and Figure 3 As shown, the two fourth prefabricated compartments are the emergency diesel engine compartment 25 and the oil storage tank compartment 26.

[0077] By configuring two of the fourth prefabricated cabins as the emergency diesel engine cabin 25 and the oil storage tank cabin 26 respectively, the configuration of the emergency diesel engine cabin 25 and the oil storage tank cabin 26 can meet the specification requirements for being arranged in the upper cabin.

[0078] Specifically, in this embodiment 1, Figure 2 and Figure 3 As shown, the two third prefabricated cabins of one second prefabricated cabin unit are the spare parts cabin 18 and the tool cabin 17, and the two fourth prefabricated cabins are the emergency diesel engine cabin 25 and the oil storage tank cabin 26; the two third prefabricated cabins of the other second prefabricated cabin unit are the rest and refuge cabin 21 and the toilet, and the two fourth prefabricated cabins are the station power distribution cabin 23 and the emergency power distribution cabin 24.

[0079] In this embodiment 1, the foundation includes four main leg columns 27 arranged in a rectangular array (due to obstruction, Figure 1 Only two main leg columns 27 are shown in the figure), the platform 1 is fixedly installed on the four main leg columns 27.

[0080] Specifically, in this embodiment 1, Figure 1 As shown, the single-layer platform double-layer structure offshore booster station also includes an emergency oil pipeline 28 and an emergency oil tank 29 fixedly installed on the main leg column 27. At most one emergency oil tank 29 is set on any main leg column 27.

[0081] By making the accident oil pools of the single-layer platform double-layer structure offshore booster station provided by the present invention adopt a layout method in which multiple accident oil pools are dispersedly arranged on each main leg column 27, it is possible to balance the loads of each main leg column 27 of the offshore booster station by adjusting the volume of each accident oil tank 29, thereby reducing the cost of the foundation. At the same time, the layout method of adopting multiple accident oil pools has the advantage of smaller mass than the layout method of a single accident oil pool, and can reduce the amount of steel used in the accident oil pool structure.

[0082] Among them, when the single-layer platform double-layer structure offshore substation provided in this embodiment 1 needs to be equipped with a cantilever crane or a helipad, a main column is set directly above one of the main leg columns 27, and the cantilever crane or helipad should be arranged directly above the main column, and the main column is used to transmit the force to the main leg column 27. The structural design of the equipment cabin connected to the cantilever crane or helipad needs to take into account the functional requirements of the cantilever crane and the helipad.

[0083] Specifically, in this embodiment 1, Figure 1 As shown, the single-layer platform double-layer structure offshore booster station also includes a cantilever crane 32, wherein a main column is provided just above one of the main leg columns 27, and the cantilever crane is installed just above the main column.

[0084] For ease of understanding, in the following text, each first prefabricated cabin and each fourth prefabricated cabin will be referred to as an upper functional cabin, and each second prefabricated cabin and each third prefabricated cabin will be referred to as a lower functional cabin.

[0085] Among them, when a living water collection device needs to be arranged above a certain upper functional cabin (that is, a first prefabricated cabin or a fourth prefabricated cabin), the structural design of the upper functional cabin and the lower functional cabin below it (that is, the second prefabricated cabin or the third prefabricated cabin below the upper functional cabin) needs to be strengthened according to this part of the function.

[0086] In this embodiment 1, Figure 1 and Figure 3As shown, the single-platform, double-deck offshore booster station also includes an operation and maintenance corridor 30, which connects the upper functional compartments (that is, the first and fourth prefabricated compartments). The corridor 30 extends from the bottom structure of each upper functional compartment and is cantilevered over one side of each upper functional compartment. Each upper functional compartment has a door facing the corridor 30, and the area beneath the corridor can be used for laying cables, ventilation pipes, and fire protection ducts.

[0087] Specifically, such as Figures 1 to 3 As shown, in this embodiment 1, the single-layer platform double-layer structure offshore booster station also includes multiple steel stairs 31, which are used to connect the platform 1, the operation and maintenance corridor 30 and the top of the upper functional cabin.

[0088] Specifically, such as Figure 1 As shown, oil retaining facilities are arranged around the main transformer 1, which can accommodate at least 20 percent of the oil volume of the main transformer 1. The oil retaining facilities are connected to the emergency oil tank 29 through the emergency oil pipe 28. The inner diameter of the emergency oil pipe 28 is not less than 150 mm, and an iron grid filter is installed at the pipe mouth.

[0089] The single-layer platform area of ​​a traditional dual-main transformer booster station is about 1480m2, weighs about 2950 tons, and has a construction period of about 167 days. Compared with a traditional dual-main transformer booster station with the same installed capacity, the single-layer platform double-layer structure offshore booster station provided in Example 1 can reduce the total area by 25%. Since the platform area and structural part are reduced, and the outdoor layout of the main transformer can further reduce outfitting and wind loads, the overall weight of the offshore booster station can be reduced by about 18%, the construction period is shortened by 25%, and the cable usage is reduced by 23%.

[0090] Example 2: Based on the single-layer platform double-layer structure offshore booster station provided in Example 1, Example 2 provides a method for configuring an emergency oil tank for the single-layer platform double-layer structure offshore booster station. The method for configuring the emergency oil tank includes: A spatial coordinate system is constructed with the geometric center of the foundation of the single-layer platform double-layer structure offshore booster station as the origin, where the plane constructed by the X-axis and Y-axis is parallel to the sea level, and the Z-axis is perpendicular to the sea level; An emergency oil tank 29 is fixedly installed on each of the four supporting columns of the foundation of the pre-set single-layer platform double-layer structure offshore booster station; Acquire first design parameter information of the accident oil tank 29, where the first design parameter information includes empty masses corresponding to the accident oil tanks 29 of different volumes; Based on the second design parameter information and the constraint conditions, a plurality of different design capacity configuration schemes for the four emergency oil tanks 29 are obtained, wherein the design capacity configuration schemes include the volumes and corresponding empty masses of the four emergency oil tanks 29; A centroid calculation model for the single-layer platform double-layer offshore booster station is constructed in a spatial coordinate system. The second design parameter information and each design capacity configuration scheme of the single-layer platform double-layer offshore booster station are used as inputs to the centroid calculation model. The centroid calculation model calculates the superimposed centroid coordinates of the accident oil tank 29 and the upper block of the single-layer platform double-layer offshore booster station corresponding to each design capacity configuration scheme. The accident tank configuration model is established with the optimization goal of minimizing the deviation between the superposition center of mass coordinates and the geometric center of the foundation; The obtained design capacity configuration schemes and the superposition centroid coordinates corresponding to the design capacity configuration schemes are used as inputs of the accident oil tank configuration model, and the accident oil tank configuration model calculates the optimal configuration scheme of the four accident oil tanks 29.

[0091] By designing the capacity of each accident oil tank 29 based on the deviation between the superimposed center of mass of the upper block and each accident oil tank 29 and the geometric center of the foundation, the loads of each main leg column 27 can be better balanced, thereby reducing the cost of the foundation.

[0092] Among them, the accident tank configuration model is constructed based on the offset value objective function; The offset value objective function is expressed as: Among them, x n is the coordinate value of the superposition center of mass on the X axis of the space coordinate system; n is the coordinate value of the superimposed mass center coordinate on the Y axis of the space coordinate system; z n is the coordinate value of the superimposed mass center coordinate on the Z axis of the spatial coordinate system; V1 is the volume of the accident oil tank 29 installed on the first leg column; V2 is the volume of the accident oil tank 29 installed on the second leg column; V3 is the volume of the accident oil tank 29 installed on the third leg column; V4 is the volume of the accident oil tank 29 installed on the fourth leg column; V i is the volume of the accident oil tank 29 installed on the i-th support leg column; λ1 is the first weighting coefficient; λ2 is the second weighting coefficient.

[0093] Specifically, in this embodiment 2, the method for calculating the superposition centroid coordinates corresponding to each design capacity configuration scheme using the centroid calculation model includes: The centroid calculation model calculates the mass information and first centroid coordinate information of the upper block and the second centroid coordinate information of each accident oil tank 29 according to the input second design parameter information; The centroid calculation model calculates the superposition centroid coordinates corresponding to any input design capacity configuration scheme based on the obtained mass information, the first centroid coordinate information and the second centroid coordinate information, and any input design capacity configuration scheme.

[0094] Specifically, in this embodiment 2, the coordinates of the superposition centroid corresponding to any design capacity configuration scheme are calculated using the following formula: Among them, x n ,y n , z n are the coordinates of the superposition center of mass corresponding to any design capacity configuration scheme in the spatial coordinate system; x0, y0, z0 are the coordinates of the center of mass of the upper block in the spatial coordinate system; x1, y1, z1 are the coordinates of the center of mass of the accident oil tank 29 installed on the first support leg in the design capacity configuration scheme in the spatial coordinate system; x2, y2, z2 are the coordinates of the center of mass of the accident oil tank 29 installed on the second support leg in the design capacity configuration scheme in the spatial coordinate system; x3, y3, z3 are the coordinates of the center of mass of the accident oil tank 29 installed on the third support leg in the design capacity configuration scheme. x4, y4, z4 are the coordinates of the center of mass of the accident oil tank 29 installed on the fourth leg column in the design capacity configuration scheme in the space coordinate system; V1 is the volume of the accident oil tank 29 installed on the first leg column in the design capacity configuration scheme; V2 is the volume of the accident oil tank 29 installed on the second leg column in the design capacity configuration scheme; V3 is the volume of the accident oil tank 29 installed on the third leg column in the design capacity configuration scheme; V4 is the volume of the accident oil tank 29 installed on the fourth leg column in the design capacity configuration scheme; m T is the mass of the upper assembly; m1 is the no-load mass of the accident oil tank 29 installed on the first leg column in the design capacity configuration scheme; m2 is the no-load mass of the accident oil tank 29 installed on the second leg column in the design capacity configuration scheme; m3 is the no-load mass of the accident oil tank 29 installed on the third leg column in the design capacity configuration scheme; m4 is the no-load mass of the accident oil tank 29 installed on the fourth leg column in the design capacity configuration scheme; ρ is the density of transformer oil.

[0095] Specifically, in this embodiment 2, the constraints are: Wherein, V1 is the volume of the emergency oil tank 29 installed on the first support leg in any design capacity configuration scheme; V2 is the volume of the emergency oil tank 29 installed on the second support leg in the design capacity configuration scheme; V3 is the volume of the emergency oil tank 29 installed on the third support leg in the design capacity configuration scheme; V4 is the volume of the emergency oil tank 29 installed on the fourth support leg in the design capacity configuration scheme; V Tis the total volume of transformer oil in the main transformer 2 installed on the second installation area of ​​the platform 1 of the upper module; m1 is the no-load mass of the emergency oil tank 29 installed on the first support leg in the design capacity configuration scheme; m2 is the no-load mass of the emergency oil tank 29 installed on the second support leg in the design capacity configuration scheme; m3 is the no-load mass of the emergency oil tank 29 installed on the third support leg in the design capacity configuration scheme; m4 is the no-load mass of the emergency oil tank 29 installed on the fourth support leg in the design capacity configuration scheme.

[0096] The single-layer platform double-layer structure offshore booster station provided by the present invention has at least the following technical effects or advantages: The multi-layer platform offshore booster station is optimized into a single-layer platform, and multiple adjacently arranged second prefabricated cabins (small prefabricated cabins) are used to jointly support the first prefabricated cabin (large prefabricated cabin). This can effectively increase the density of the frame supporting the first prefabricated cabin, so that the upper functional cabin (first prefabricated cabin) can be stably supported by the frame of the lower functional cabin (each second prefabricated cabin), protecting the structure of the first prefabricated cabin and each second prefabricated cabin from deformation and damage, thereby protecting the functional equipment in the cabin. There is no need to set up additional beam-column structures to provide auxiliary support for the upper functional cabin (first prefabricated cabin), which can effectively reduce the amount of steel used in the offshore booster station structure, reduce maintenance costs and construction costs, and shorten the construction period.

[0097] 2. In the offshore substation, the cabins with larger occupied areas usually include a relay cabin, a high-voltage distribution cabin and at least one medium-voltage distribution cabin (usually the number of medium-voltage distribution cabins 6 is consistent with the number of main transformers 2 in the offshore substation). It is only necessary to determine the number of first prefabricated cabin units based on the total number of relay cabins 4, high-voltage distribution cabins 5 and medium-voltage distribution cabins 6, and configure two of the second prefabricated cabins as relay cabins 4 and high-voltage distribution cabins 5 respectively, and configure the remaining second prefabricated cabins as medium-voltage distribution cabins 6; this can ensure that all large cabins in the offshore substation can be set in the corresponding first prefabricated cabins (large prefabricated cabins).

[0098] 3. It is only necessary to configure any second prefabricated cabin below the first prefabricated cabin configured as the high-voltage distribution cabin 5 as a high-voltage cable mezzanine cabin 11 for laying the submarine transmission cable 12, and to configure any second prefabricated cabin below the first prefabricated cabin configured as the medium-voltage distribution cabin 6 as a medium-voltage cable mezzanine cabin 7 for laying the collector line submarine cable 8, so as to form an incoming line channel of the medium-voltage distribution cabin 6 and an outgoing line channel of the high-voltage distribution cabin 5; so that the single-layer platform double-layer structure offshore substation provided by the present invention does not need to be additionally provided with a separate cable mezzanine (no longer needs to be set as a double-layer platform), which saves one layer of platform, optimizes the platform volume of the offshore substation, further reduces the construction cost of the offshore substation, and shortens the construction period.

[0099] 4. The single-layer platform double-layer structure offshore booster station provided by the present invention simplifies the structure of the offshore booster station, reduces the amount of structural steel, shortens the construction period, and reduces construction costs by proposing a double-layer arrangement structure of a single-layer platform 1 with a small cabin at the bottom and a large cabin at the top, which is aligned up and down.

[0100] 5. In the single-layer platform double-layer structure offshore substation provided by the present invention, the main transformer 2 and the associated radiator 3 are arranged outdoors (both the main transformer 2 and the radiator 3 are arranged outdoors in the second installation area). This can effectively improve the heat dissipation efficiency of the main transformer 2, eliminate the outfitting structure of the main transformer 2 room, reduce the wind load on the offshore substation, and contribute to the compact and lightweight design of the offshore substation.

[0101] 6. By arranging the first sub-area, the second installation area and the second sub-area in sequence along the first horizontal direction, the single-layer platform double-layer structure offshore substation provided by the present invention is arranged in a centrally symmetrical structure as a whole (the main transformer 2 is in the center, and the first prefabricated cabin units are symmetrically arranged on both sides of the main transformer 2), which can effectively improve the space utilization of the offshore substation.

[0102] 7. By arranging the multiple first prefabricated cabin units installed in the first sub-area and the multiple first prefabricated cabin units installed in the second sub-area in sequence along the second horizontal direction, the overall structure of the single-layer platform double-layer structure offshore substation provided by the present invention is made more compact, which not only improves the space utilization rate of the offshore substation, but also improves the stability of the offshore substation.

[0103] 8. By installing the main transformer 2 in the fourth sub-area located in the center and installing the radiator 3 in the fourth sub-area and / or the fifth sub-area located on both sides, in the single-layer platform double-layer structure offshore substation provided by the present invention, each first prefabricated cabin unit and the radiator 3 are arranged around the transformer, making the overall structure more compact and further improving space utilization.

[0104] 9. By arranging the first prefabricated cabin unit containing the medium-voltage distribution cabin 6 near the second installation area, the medium-voltage line 10, one end of which is connected to the medium-voltage distribution equipment 9 in the medium-voltage distribution cabin 6, can directly pass through the side of the medium-voltage distribution cabin 6 close to the second installation area to the second installation area and connect to the medium-voltage side of the corresponding main transformer 2 in the second installation area, thereby reducing the laying length of the medium-voltage line 10 and the amount of cable used in the medium-voltage line 10.

[0105] 10. By arranging the medium-voltage cable mezzanine compartment 7 adjacent to the second installation area, and allowing the medium-voltage line 10, one end of which is connected to the medium-voltage distribution equipment 9 in the medium-voltage distribution compartment 6, to be led downward to the medium-voltage cable mezzanine compartment 7 below, pass through the second installation area and be connected to the medium-voltage side of the main transformer 2, the overhead height of the medium-voltage line 10 in the second installation area can be reduced, which can facilitate the subsequent operation and maintenance work.

[0106] 11. By arranging the first prefabricated cabin unit containing the high-voltage distribution cabin 5 near the second installation area, the high-voltage line 14 connected to the high-voltage distribution equipment 13 in the high-voltage distribution cabin 5 at one end can directly pass through the side of the high-voltage distribution cabin 5 close to the second installation area to the second installation area and connect to the high-voltage side of the corresponding main transformer 2 in the second installation area, which can reduce the laying length of the high-voltage line 14 and reduce the cable usage of the high-voltage line 14.

[0107] 12. By arranging the high-voltage cable mezzanine compartment 11 adjacent to the second installation area, and allowing the high-voltage line 14 connected to the high-voltage distribution equipment 13 in the high-voltage distribution compartment 5 at one end to be led downward to the high-voltage cable mezzanine compartment 11 below, then pass through to the second installation area and be connected to the high-voltage side of the main transformer 2, the overhead height of the high-voltage line 14 in the second installation area can be reduced, which can facilitate the subsequent operation and maintenance work.

[0108] 13. By setting up the second prefabricated cabin unit, the single-layer platform double-layer structure offshore booster station provided by the present invention can have more small prefabricated cabins for configuring various functional cabins of the offshore booster station, thereby improving the flexibility of the functional cabin layout.

[0109] 14. By configuring two of the fourth prefabricated cabins as the emergency diesel engine cabin 25 and the oil storage tank cabin 26 respectively, the configuration of the emergency diesel engine cabin 25 and the oil storage tank cabin 26 can meet the specification requirements for being arranged in the upper cabin.

[0110] 15. By making the accident oil pools of the single-layer platform double-layer structure offshore booster station provided by the present invention adopt a layout method in which multiple accident oil pools are dispersedly arranged on each main leg column 27, it is possible to balance the loads of each main leg column 27 of the offshore booster station by adjusting the volume of each accident oil tank 29, thereby reducing the cost of the foundation. At the same time, the layout method of adopting multiple accident oil pools has the advantage of smaller mass than the layout method of a single accident oil pool, and can reduce the amount of steel used in the accident oil pool structure.

[0111] 16. By designing the capacity of each emergency oil tank 29 based on the deviation between the superimposed mass center of the upper block and each emergency oil tank 29 and the geometric center of the foundation, the load of each main leg column 27 can be better balanced, thereby reducing the cost of the foundation.

[0112] The above are only specific application examples of the present invention and do not constitute any limitation to the protection scope of the present invention. Any technical solutions formed by equivalent transformation or equivalent replacement shall fall within the protection scope of the present invention.

Claims

1. A single-layer platform double-layer structure offshore booster station, characterized by: The invention comprises a bottom foundation, an upper assembly block fixed on the foundation, the upper assembly block comprising a single-layer platform fixedly mounted on the foundation, and at least three first prefabricated cabin units fixedly mounted on the single-layer platform; The upper surface of the platform is divided into a first installation area and a second installation area, the first installation area is used for fixedly installing the first prefabricated cabin unit, and the second installation area is used for installing the main transformer and the matching radiator; Each of the first prefabricated cabin units includes a first prefabricated cabin and a plurality of second prefabricated cabins containing functional equipment, wherein the second prefabricated cabins are arranged adjacent to each other and are used to jointly support the first prefabricated cabin; Two of the first prefabricated cabins are a relay cabin and a high-voltage distribution cabin, and the remaining first prefabricated cabin is a medium-voltage distribution cabin.

2. The single-layer platform double-layer structure offshore booster station according to claim 1, characterized in that: The number of the medium voltage distribution compartments is equal to the number of the main transformers installed in the second installation area.

3. The single-layer platform double-layer structure offshore booster station according to claim 1, characterized in that: The first installation area includes a first sub-area and a second sub-area; The first sub-area, the second installation area and the second sub-area are arranged in sequence along a first horizontal direction, the first horizontal direction is the length direction or width direction of the platform, and at least one first prefabricated cabin unit is installed on the first sub-area and the second sub-area.

4. The single-layer platform double-layer structure offshore booster station according to claim 3 is characterized by: When multiple first prefabricated cabin units are installed on the first sub-area, the multiple first prefabricated cabin units installed on the first sub-area are arranged in sequence along the second horizontal direction perpendicular to the first horizontal direction; when multiple first prefabricated cabin units are installed on the second sub-area, the multiple first prefabricated cabin units installed on the second sub-area are arranged in sequence along the second horizontal direction.

5. The single-layer platform double-layer structure offshore booster station according to claim 4 is characterized in that: The second installation area includes a third sub-area, a fourth sub-area and a fifth sub-area sequentially arranged along the second horizontal direction; The fourth sub-area is used for installing the main transformer, and the third sub-area and the fifth sub-area are used for installing the radiator.

6. The single-layer platform double-layer structure offshore booster station according to claim 1, characterized in that: A first prefabricated cabin unit including the medium voltage distribution cabin is arranged adjacent to the second installation area; One of the second prefabricated cabins below the medium-voltage distribution cabin is a medium-voltage cable mezzanine cabin, which is used to lay the collector line submarine cable; the collector line submarine cable can be led upward along the foundation to the medium-voltage cable mezzanine cabin, and then continue to be led upward to the medium-voltage distribution equipment in the medium-voltage distribution cabin above.

7. The single-layer platform double-layer structure offshore booster station according to claim 6, characterized in that: The medium-voltage cable mezzanine compartment is arranged adjacent to the second installation area, and the medium-voltage cable mezzanine compartment is also used to lay medium-voltage lines; the medium-voltage line, one end of which is connected to the medium-voltage distribution equipment in the medium-voltage distribution compartment, can be led downward to the medium-voltage cable mezzanine compartment below, and then pass through the second installation area and be connected to the medium-voltage side of the main transformer.

8. The single-layer platform double-layer structure offshore booster station according to claim 6, characterized in that: A first prefabricated cabin unit including the high-voltage distribution cabin is arranged adjacent to the second installation area; One of the second prefabricated cabins below the high-voltage distribution cabin is a high-voltage cable mezzanine cabin, which is used to lay submarine delivery cables; the submarine delivery cables can be led upward along the foundation to the high-voltage cable mezzanine cabin, and then continue to be led upward to the high-voltage distribution equipment in the high-voltage distribution cabin above.

9. The single-layer platform double-layer structure offshore booster station according to claim 8, characterized in that: The high-voltage cable mezzanine compartment is arranged adjacent to the second installation area, and the high-voltage cable mezzanine compartment is also used to lay high-voltage lines; the high-voltage line, one end of which is connected to the high-voltage distribution equipment in the high-voltage distribution compartment, can be led downward to the high-voltage cable mezzanine compartment below, and then pass through the second installation area and be connected to the high-voltage side of the main transformer.

10. The single-layer platform double-layer structure offshore booster station according to claim 8, characterized in that: Except for the second prefabricated cabin set as the medium-voltage cable mezzanine cabin and the second prefabricated cabin set as the high-voltage cable mezzanine cabin, the remaining second prefabricated cabins are station substation cabins or grounding resistor cabinet cabins or tool cabins or spare parts cabins or battery cabins or fire-fighting equipment cabins or rest and refuge cabins or ventilator cabins or station power distribution cabins or emergency power distribution cabins.

11. The single-layer platform double-layer structure offshore booster station according to claim 1, characterized in that: The upper assembly block further includes at least one second prefabricated cabin unit fixedly mounted on the first mounting area; The second prefabricated cabin unit includes a plurality of third prefabricated cabins containing functional equipment and a plurality of fourth prefabricated cabins containing functional equipment. Each of the third prefabricated cabins is fixedly installed on the first installation area and arranged adjacent to each other, and each of the fourth prefabricated cabins is fixedly installed above each of the third prefabricated cabins and arranged adjacent to each other.

12. The single-layer platform double-layer structure offshore booster station according to claim 11, characterized in that: Two of the fourth prefabricated compartments are the emergency diesel engine compartment and the oil storage tank compartment.

13. The single-layer platform double-layer structure offshore booster station according to claim 1, characterized in that: The foundation comprises four main leg columns arranged in a rectangular array, and the platform is fixedly mounted on the four main leg columns; The single-layer platform double-layer structure offshore booster station also includes an emergency oil pipeline and an emergency oil tank fixedly installed on the main leg column, and at most one emergency oil tank is arranged on any one of the main leg columns.

14. A method for configuring an emergency oil tank for a single-layer platform double-layer offshore booster station as claimed in claim 13, characterized in that: The emergency oil tank configuration method includes: A spatial coordinate system is constructed with the geometric center of the foundation of the single-layer platform double-layer structure offshore booster station as the origin, where the plane constructed by the X-axis and Y-axis is parallel to the sea level, and the Z-axis is perpendicular to the sea level; An emergency oil tank is fixedly installed on each of the four supporting legs of the foundation of the single-layer platform double-layer structure offshore booster station; Acquiring first design parameter information of the accident oil tank, where the first design parameter information includes empty masses corresponding to accident oil tanks of different volumes; Based on the second design parameter information and the constraint condition, a plurality of different design capacity configuration schemes for the four emergency oil tanks are obtained, wherein the design capacity configuration schemes include the volumes and corresponding empty masses of the four emergency oil tanks; Constructing a centroid calculation model for the single-layer platform double-layer structure offshore booster station in the spatial coordinate system, using the second design parameter information of the single-layer platform double-layer structure offshore booster station and each of the design capacity configuration schemes as inputs to the centroid calculation model, and calculating the superimposed centroid coordinates of the accident oil tank corresponding to each of the design capacity configuration schemes and the upper block of the single-layer platform double-layer structure offshore booster station by the centroid calculation model; Establishing an accident oil tank configuration model with the minimum deviation between the superposition centroid coordinates and the geometric center of the foundation as an optimization goal; The obtained design capacity configuration schemes and the superimposed centroid coordinates corresponding to the design capacity configuration schemes are used as inputs of the accident oil tank configuration model, and the accident oil tank configuration model calculates the optimal configuration scheme of the four accident oil tanks.

15. The method for configuring emergency oil tanks for a single-layer platform double-layer offshore booster station according to claim 14, characterized in that: The accident oil tank configuration model is constructed based on the offset value objective function; The offset value objective function is expressed as: Among them, x n y is the coordinate value of the superposition center of mass coordinate on the X axis of the space coordinate system; n z is the coordinate value of the superposition centroid coordinate on the Y axis of the spatial coordinate system; n is the coordinate value of the superimposed mass center coordinate on the Z axis of the spatial coordinate system; V1 is the volume of the accident oil tank installed on the first said leg column; V2 is the volume of the accident oil tank installed on the second said leg column; V3 is the volume of the accident oil tank installed on the third said leg column; V4 is the volume of the accident oil tank installed on the fourth said leg column; V i is the volume of the accident oil tank installed on the i-th support leg column; λ1 is the first weighting coefficient; λ2 is the second weighting coefficient.

16. The method for configuring an emergency oil tank for a single-layer platform double-layer offshore booster station according to claim 14, characterized in that: The method for calculating the superposition centroid coordinates corresponding to each of the design capacity configuration schemes using the centroid calculation model includes: The centroid calculation model calculates the mass information and first centroid coordinate information of the upper block and the second centroid coordinate information of each of the accident oil tanks according to the input second design parameter information; The centroid calculation model calculates the superimposed centroid coordinates corresponding to the design capacity configuration scheme based on the obtained quality information, the first centroid coordinate information and the second centroid coordinate information, and any input design capacity configuration scheme.

17. The method for configuring an emergency oil tank for a single-layer platform double-layer offshore booster station according to claim 16, characterized in that: The superposition centroid coordinates corresponding to any of the design capacity configuration schemes are calculated using the following formula: Among them, x n ,y n , z n are the coordinates of the superimposed centroid coordinates corresponding to any of the design capacity configuration schemes in the spatial coordinate system; x0, y0, z0 are the coordinates of the centroid of the upper block in the spatial coordinate system; x1, y1, z1 are the coordinates of the centroid of the accident oil tank installed on the first leg column in the design capacity configuration scheme in the spatial coordinate system; x2, y2, z2 are the coordinates of the centroid of the accident oil tank installed on the second leg column in the design capacity configuration scheme in the spatial coordinate system; x3, y3, z3 are the coordinates of the centroid of the accident oil tank installed on the third leg column in the design capacity configuration scheme. The coordinates of the center of mass of the tank in the spatial coordinate system; x4, y4, z4 are the coordinates of the center of mass of the accident oil tank installed on the fourth leg column in the design capacity configuration scheme in the spatial coordinate system; V1 is the volume of the accident oil tank installed on the first leg column in the design capacity configuration scheme; V2 is the volume of the accident oil tank installed on the second leg column in the design capacity configuration scheme; V3 is the volume of the accident oil tank installed on the third leg column in the design capacity configuration scheme; V4 is the volume of the accident oil tank installed on the fourth leg column in the design capacity configuration scheme; m T is the mass of the upper assembly; m1 is the no-load mass of the accident oil tank installed on the first said support leg column in the said design capacity configuration scheme; m2 is the no-load mass of the accident oil tank installed on the second said support leg column in the said design capacity configuration scheme; m3 is the no-load mass of the accident oil tank installed on the third said support leg column in the said design capacity configuration scheme; m4 is the no-load mass of the accident oil tank installed on the fourth said support leg column in the said design capacity configuration scheme; ρ is the density of transformer oil.

18. The method for configuring emergency oil tanks for a single-layer platform double-layer offshore booster station according to claim 14, characterized in that: The constraints are: Wherein, V1 is the volume of the emergency oil tank installed on the first support leg column in any of the design capacity configuration schemes; V2 is the volume of the emergency oil tank installed on the second support leg column in the design capacity configuration scheme; V3 is the volume of the emergency oil tank installed on the third support leg column in the design capacity configuration scheme; V4 is the volume of the emergency oil tank installed on the fourth support leg column in the design capacity configuration scheme; V T is the total volume of transformer oil in the main transformer installed on the second installation area of ​​the platform of the upper assembly; m1 is the no-load mass of the emergency oil tank installed on the first support leg in the design capacity configuration scheme; m2 is the no-load mass of the emergency oil tank installed on the second support leg in the design capacity configuration scheme; m3 is the no-load mass of the emergency oil tank installed on the third support leg in the design capacity configuration scheme; m4 is the no-load mass of the emergency oil tank installed on the fourth support leg in the design capacity configuration scheme.

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