CN110844012A - Deep draft semi-submersible type offshore converter station - Google Patents
Deep draft semi-submersible type offshore converter station Download PDFInfo
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- CN110844012A CN110844012A CN201911119018.2A CN201911119018A CN110844012A CN 110844012 A CN110844012 A CN 110844012A CN 201911119018 A CN201911119018 A CN 201911119018A CN 110844012 A CN110844012 A CN 110844012A
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- 238000004873 anchoring Methods 0.000 claims abstract description 17
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
- B63B2021/505—Methods for installation or mooring of floating offshore platforms on site
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
- B63B2035/4433—Floating structures carrying electric power plants
- B63B2035/446—Floating structures carrying electric power plants for converting wind energy into electric energy
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Abstract
The invention relates to a deep draft semi-submersible offshore converter station, which is suitable for the field of offshore wind power development, in particular to the field of open sea wind power generation with the water depth of more than 40 meters. The deep draft semi-submersible offshore converter station comprises an upper module, four support columns, a bypass space, a lower floating body and a mooring line anchoring system, wherein the support columns are connected with the adjacent support columns through the bypass space, the support columns are used for supporting the upper module upwards, the lower floating body is connected below the support columns and is used for adjusting draft of the deep draft semi-submersible offshore converter station, and the mooring line anchoring system is used for positioning and fixing the deep draft semi-submersible offshore converter station; the upper module is always above the sea surface, and the support column part, the lower floating body and the mooring cable anchoring system are all below the sea surface. The structure provided by the invention can be repeatedly used, the position of the structure can be flexibly adjusted, and the operation of the factory returning transportation process after disaster or after decommissioning is simple without marine cutting.
Description
Technical Field
The invention relates to a deep draft semi-submersible offshore converter station, which is suitable for the field of offshore wind power development, in particular to the field of open sea wind power generation with the water depth of more than 40 meters.
Background
With the development of offshore wind power to deep and far sea, an offshore wind farm needs to be provided with a larger and larger offshore electrical platform for collecting and boosting the electric energy generated by a wind generating set. Offshore converter stations using flexible direct current technology will have significant economic advantages when the offshore distance exceeds a certain level. Because large-scale electrical equipment such as a converter valve, a bridge arm reactor and the like are arranged in the station, the weight of the offshore converter station far exceeds that of the offshore alternating-current booster station, and can reach 2-3 ten thousand tons. For an offshore converter station which can be applied to water depth of 40-50 m, the current technical solution is to adopt a bottom-sitting type gravity platform or a conduit-type platform-floating method for installation. The former has very high requirement on the flatness of the site where the structure is located, and the cost for leveling the offshore artificial site is very large, so that the application range is greatly limited. The latter has become more and more mature to be used in the offshore oil and gas industry, and is also beginning to be explored abroad for offshore converter stations, such as the german Borwin 3 project planned to be officially put into operation in 2019. However, the fixed offshore converter station installed by the floating method has the following technical problems:
1) in order to buffer the impact action of the upper and lower blocks during butt-joint installation, a leg coupling device lmu (legmating unit), a block deck support unit dsu (deck Supporting unit), a surging and swaying fender and the like are generally required to be arranged, so that the design and construction difficulty is high, and the cost is high;
2) if the geological conditions are severe and the bedrock is buried shallowly, the pile foundation engineering of the fixed platform needs rock-socketing treatment, so that the safety risk is high and the engineering economy is poor;
3) technical risks of ship positioning, control and collision prevention in the floating-support operation are high, once accidents such as mechanical equipment failure occur, installation butt joint time can be prolonged, a weather window period is missed, and a structure is damaged, so that similar cases already occur in the engineering practice of floating-support installation of an ocean oil-gas platform at present;
4) the blocks for accommodating large-scale electrical equipment are all concentrated on the upper part of the structure, the gravity center is high, the horizontal area is large, the structural response level is very high under the action of inertia force working conditions such as earthquake and transportation, and the defects of insufficient bearing margin and poor usability exist.
The existing offshore converter station technology does not provide a reasonable solution to all 3 problems. The solution of the fixed platform (patent publication No. CN 207559399U) substantially follows the concept of arrangement of land-based converter stations, and can only reduce the horizontal size of the blocks by layering, but at the cost of offsetting and increasing the center of gravity. Under the technical scheme, the structure has poor stress performance no matter for the upper block or the lower fixed support block, and the optimized space of the total arrangement scheme is extremely limited. Therefore, it is necessary to provide a reasonable and effective structure of the offshore converter station to ensure the reliability and economy of the offshore converter station in practical engineering application.
Disclosure of Invention
The technical problem to be solved by the invention is as follows:
1) the offshore converter station is integrally built and installed in a building site, butt joint buffer devices and procedures such as LMUs and DSUs are omitted, and a floating method and relevant ship equipment are avoided.
2) The limit of the structure to the conditions of the field soil and the rock stratum is avoided, and the application range which can be developed is expanded.
3) The gravity center height of the offshore converter station structure is reduced, the plane size is reduced, and the bearing performance of the structure under the marine environment power working condition is improved.
4) The marine converter station is different from a conventional semi-submersible type ocean platform, and through special structural arrangement (ballast) and anchoring system design, the marine converter station is used for buffering the rolling, pitching and heaving motions of the marine converter station in a targeted manner, so that the inclination deformation of each electrical device and the inertial acceleration input of a basic position are effectively controlled, and the normal use performance is not influenced.
The technical scheme adopted by the invention is as follows:
the utility model provides a deep draft semi-submersible formula marine converter station which characterized in that: the deep draft semi-submersible offshore converter station comprises an upper module, four support columns, a bypass space, a lower floating body and a mooring line anchoring system, wherein the support columns are connected with the adjacent support columns through the bypass space, the support columns are used for supporting the upper module upwards, the lower floating body is connected below the support columns and is used for adjusting draft of the deep draft semi-submersible offshore converter station, and the mooring line anchoring system is used for positioning and fixing the deep draft semi-submersible offshore converter station; the upper module is always above the sea surface, and the support column part, the lower floating body and the mooring cable anchoring system are all below the sea surface.
While adopting the technical scheme, the invention can also adopt or combine the following technical scheme:
as a preferred technical scheme of the invention: the upper module is a single-layer steel structure factory building, the two direction scales of the horizontal plane are almost the same, the west side is a converter valve hall, the east side is a direct current chamber, the north and south of the equipment room are symmetrically arranged, and an equipment carrying area is arranged.
As a preferred technical scheme of the invention: the support post is located the four corners of deep draft semi-submerged formula marine converter station horizontal plane symmetrically, and every support post is the square tube type space that encloses by the steel sheet structure, leaves cable and pipeline well and elevartor shaft in the square tube type space four corners, from last five layers down totally in the square tube type space: (1) the first layer is a connection conversion layer, no equipment room is arranged except for cables and pipelines which are necessary for communicating the upper layer and the lower layer, and a plurality of vertical structural dampers are arranged on the edge of the plane and are used for buffering the heaving inertia effect of the deep draft semi-submersible type offshore converter station on the upper module; (2) the second layer is a cooling equipment layer, converter valve cooling equipment is arranged in the space of the southwest corner and the northwest corner, main transformer cooling equipment is arranged in the space of the northeast corner, and a seawater pump room and water treatment equipment are arranged in the space of the southeast corner; (3) the third layer is an electrical equipment layer, the cylinders on four corners are connected with adjacent supporting upright post cylinders through bypass spaces, the horizontal surface is in a shape like a Chinese character 'hui', the heights of the supporting upright post cylinders and the bypass spaces on the layer are 2 times of those on other layers, a moon pool can be formed, a water body surrounded by the layer structure is utilized to form a buffer effect on horizontal inertial load, two main transformers are arranged in the centers of the east side bypass and the north side bypass, two GIS and secondary AC equipment rooms are arranged in the west side bypass and the corner spaces, storage batteries and emergency power distribution centers are arranged in the corner spaces of the north side bypass and the south side bypass, a public AC secondary room and a central control room are arranged in the south side, and hoisting and equipment carrying areas are arranged at the positions of the main transformers and the GIS; (4) the fourth layer is a power layer, and three diesel generators and a station power center are respectively arranged in four corner spaces; (5) the fifth layer is a heating ventilation and water supply and drainage layer, and four corner spaces are respectively provided with a water pump room and a heating ventilation machine room.
As a preferred technical scheme of the invention: the horizontal surface of the lower floating body is in a shape of Chinese character 'hui' or a shape of Chinese character 'jing', a plurality of separated ballast water tanks are arranged inside the lower floating body and used for adjusting the draught of the platform, and mooring and positioning control chambers are arranged in the spaces of four corners.
As a preferred technical scheme of the invention: the mooring anchoring system consists of an anchor machine, a cable guider, anchor chains and an anchor body, and is respectively arranged at four corners of a lower floating body of the deep draft semi-submersible type offshore converter station, and each corner point is provided with 3 anchor chains which are arranged in a 4 multiplied by 3 manner, so that the permanent mooring requirement of the deep draft semi-submersible type offshore converter station is met; the anchor machine has the function of adjusting the length of the anchor chain and provides different positioning performances under different service working conditions; the direction of the anchor chain is adjusted through the cable guide device, and the load borne by the converter station is transmitted to the anchor body arranged on the seabed; the anchor body is pre-installed in an engineering sea area, and a gripping anchor, a suction anchor, a pile foundation or a gravity anchor can be selected according to the field condition.
As a preferred technical scheme of the invention: the main body part comprises an upper module, four supporting columns, a bypass space, a lower floating body and a mooring anchor system.
As a preferred technical scheme of the invention: the draft of the deep draft semi-submersible offshore converter station can be adjusted according to different conditions: during normal operation, the change of the sea level is positioned in the range of the electrical equipment layer in the support upright post, and the lower layers are positioned in the water surface and are always in a deep draft state; when equipment is overhauled, good weather conditions are selected, ballast water is reduced, so that the electrical equipment layer of the upright post can float out of the water surface, and the equipment is carried through the hoisting platform; when the storm self-storage state, ballast water is added, so that the electrical equipment layer is completely immersed below the water surface, and the overall stability of the platform is improved.
As a preferred technical scheme of the invention: the supporting submarine cables of the mooring cable anchoring system are connected into the upper module through J-shaped pipes arranged on the inner side walls of the support upright posts and the lower floating body in a shape like a Chinese character 'hui'; necessary ship-leaning facilities are arranged on the outer side wall of the square-back shape within the range of the electrical equipment layer in the supporting upright post.
As a preferred technical scheme of the invention: and the outer surfaces of all parts of the structure of the deep draft semi-submersible offshore converter station are subjected to anti-corrosion and anti-seepage design treatment.
The invention has the beneficial effects that:
1) except for dragging ships, any special ship equipment or additional anti-collision butt joint buffer facilities are not needed, the risk of structural failure caused by floating-support method installation is avoided, the geological conditions of a service site are not needed, the construction process is simple and easy to implement, and the application range is wide;
2) the gravity center of the structure can meet the requirement of eccentricity tolerance in a horizontal plane, the height of the structure in the vertical direction is greatly reduced, the bearing capacity of the structure under the power working condition can be obviously improved, and the most unfavorable anti-seismic problem of a fixed structure is avoided;
3) the structure can be repeatedly used, the position can be flexibly adjusted, the operation of the factory returning transportation process after disaster or after decommissioning is simple, and marine cutting is not needed.
Drawings
FIG. 1 is a three-dimensional schematic of the present invention.
Fig. 2 is a plan view of the upper block.
Fig. 3 is a plan view of a first layer of support columns.
Fig. 4 is a plan view of a second layer of support posts.
Fig. 5 is a plan view of the third layer of support posts and the bypass space.
Fig. 6 is a plan view of a fourth layer of support columns.
Fig. 7 is a plan view of a fifth layer of support columns.
Fig. 8 is a plan view of the lower float.
Figure 9 is a partial view of the connection location of the buoyant hull to the mooring line anchoring system.
Detailed Description
To further illustrate the contents, features and effects of the present invention, an embodiment is described below with reference to the accompanying drawings.
(1) As shown in fig. 1, the present embodiment includes the following components: 1-upper module, 2-connection conversion layer, 3-cooling equipment layer, 4-electrical equipment layer, 5-power layer, 6-heating and water supply and drainage layer, 7-lower floating body and 8-mooring anchor system. In the embodiment, the plane size is 90 m × 70 m, the total height is 61 m, the height of the upper block 1 is 18 m, the height of the connection conversion layer 2 is 3m, the height of the cooling device layer 3 is 6 m, the height of the electrical device layer 4 is 12 m, the heights of the power layer 5, the heating ventilation layer and the water supply and drainage layer 6 are 6 m, the height of the lower floating body 7 is 10 m, the average sea level is located between the connection conversion layer 2 and the cooling device layer 3, and the corner positions of each area are in arc transition with the radius of 3m, so that the hydrodynamic performance is improved. And building each partition at the dock foundation, folding and assembling and debugging equipment at the dock foundation, towing and transporting the partition to a service site (with the water depth of 40-50 m) by a tugboat after the construction, positioning and anchoring the partition by four groups of mooring anchoring systems 8 connected below the lower floating body 7, finally connecting a submarine cable, and putting the converter station into production operation. In this embodiment, the moon pool 100 is formed between the electrical equipment layer 4 and the lower floating body 7, so that the response of the whole converter station in the horizontal direction is reduced, and the buffering effect of the horizontal inertial load is achieved.
(2) As shown in fig. 2: the west side of the upper block 1 is provided with north-south symmetrical converter valve halls 11a and 11 b; the south-north symmetrical direct current chambers 12a and 12b are arranged on the east side; arranging an equipment hoisting and handling area 13 above the direct current chamber; at the four corners, a lift shaft 9a and a cable shaft 10a are arranged, which ensure a vertical penetration.
(3) As shown in fig. 3: the connection conversion layer 2 is respectively positioned at four corners, and an elevator shaft 9b and a cable shaft 10b which correspond to the upper elevator shaft 9a and the cable shaft 10a are arranged; at each connection transfer level 2 8 vertical structural dampers 21 are arranged for damping the heave inertia of the platform to which the upper block 1 is subjected.
(4) As shown in fig. 4: the cooling installation floor 3 and the connection transfer floor 2 are arranged in the support column space, likewise at the four corners, through which an elevator shaft 9c and a cable shaft 10c run. The northwest corner and the southwest corner are provided with a converter valve cooling chamber 31 in which converter valve cooling equipment is arranged; the northeast corner is provided with a main transformer cooling chamber 32, and main transformer cooling equipment is arranged in the main transformer cooling chamber; the southeast corner is provided with a seawater pump room 33, and a seawater pump room and water treatment equipment are arranged in the seawater pump room.
(5) As shown in fig. 5: the electrical equipment layer 4 is a bypass space, a maintainer enters from the elevator shaft 9d, and a cable enters from the cable shaft 10 d. 252kVGIS chambers 41 and 550kVGIS chambers 42 are arranged in the bypass space of the electrical equipment layer 4 on the west side; a power distribution room 43, an emergency power distribution center 44 and a storage battery room 45 are arranged at the positions close to the upright columns on the north side, and the three rooms are arranged from north to south; a main transformer chamber 46 is respectively arranged at the north side and the east side, and a switch cabinet and a station transformer chamber 47 are arranged between the main transformer chambers (northeast corner); the south side is provided with 6 storage battery chambers 45, a secondary alternating current equipment chamber 48 and a central control chamber 49 from west to east in sequence, and a hoisting and equipment carrying area 40 is arranged at the position of the main transformer and the GIS. The central area of the electrical equipment layer 4 forms a moon pool 100 to reduce the horizontal dynamic response of the converter station.
(6) As shown in fig. 6: the arrangement of the power layer 5 is the same as that of the electrical equipment layer 4, an elevator shaft 9e and a cable shaft 10e are arranged at corresponding positions, a diesel engine room 51 is arranged at the northeast corner, the southwest corner and the northwest corner, and a power center room 52 of the converter station is arranged at the southeast corner.
(7) As shown in fig. 7: the heating ventilation and water supply and drainage layer 6 and the power layer 5 are arranged in the space of the supporting upright post, the layer is communicated with the power layer 5 through an elevator shaft 9f and a cable shaft 10f, the heating ventilation machine rooms 61 are arranged at the northwest corner and the southeast corner, and the fire pump rooms 62 are arranged at the southwest corner and the northeast corner.
(8) As shown in fig. 8 and 9: the lower floating body 7 is provided with ballast water tanks 71 except four corners, the four corners are respectively provided with a mooring control chamber 72, and each 72 is internally provided with 3 anchor chains which are arranged in a 4 multiplied by 3 way; 8 consists of an anchor chain 81, an anchor body 82, an anchor machine 83 and a cable guide 84. The anchor machines 83 arranged at four corners of the lower floating body 7 can adjust the positioning performance of the floating converter station by adjusting the length of the anchor chain 81 and the direction of the cable guide 84, tighten the anchor chain 81 under the normal working condition and limit the movement amplitude of the converter station; and the anchor chain 81 is loosened under the extreme living condition, so that the tension borne by the anchor chain 81 is reduced, and the anchor chain 81 is not broken and the anchor body 82 is not anchored.
(9) The submarine cable in the embodiment is completely dynamically designed and is connected to the upper block 1 through a J-shaped pipe arranged on the inner side wall of the square-turn shape between the connection conversion layer 2 and the lower floating body 7; necessary ship-leaning facilities are arranged on the outer side wall of the shape like the Chinese character 'hui' in the elevation range of the electrical equipment layer 4.
9) In this embodiment, the outer surfaces of the structural parts from the upper block 1 to the lower float 7 are subjected to anti-corrosion and anti-seepage design treatment.
The above embodiment is merely a preferred embodiment of the present invention, and those skilled in the art will understand that modifications or substitutions of technical solutions or parameters in the embodiment can be made without departing from the principle and essence of the present invention, and all of them shall be covered by the protection scope of the present invention.
Claims (9)
1. The utility model provides a deep draft semi-submersible formula marine converter station which characterized in that: the deep draft semi-submersible offshore converter station comprises an upper module, four support columns, a bypass space, a lower floating body and a mooring line anchoring system, wherein the support columns are connected with the adjacent support columns through the bypass space, the support columns are used for supporting the upper module upwards, the lower floating body is connected below the support columns and is used for adjusting draft of the deep draft semi-submersible offshore converter station, and the mooring line anchoring system is used for positioning and fixing the deep draft semi-submersible offshore converter station; the upper module is always above the sea surface, and the support column part, the lower floating body and the mooring cable anchoring system are all below the sea surface.
2. The deep draft semi-submersible offshore converter station of claim 1, wherein: the upper module is a single-layer steel structure factory building, the two direction scales of the horizontal plane are almost the same, the west side is a converter valve hall, the east side is a direct current chamber, the north and south of the equipment room are symmetrically arranged, and an equipment carrying area is arranged.
3. The deep draft semi-submersible offshore converter station of claim 1, wherein: the support post is located the four corners of deep draft semi-submerged formula marine converter station horizontal plane symmetrically, and every support post is the square tube type space that encloses by the steel sheet structure, leaves cable and pipeline well and elevartor shaft in the square tube type space four corners, from last five layers down totally in the square tube type space: (1) the first layer is a connection conversion layer, no equipment room is arranged except for cables and pipelines which are necessary for communicating the upper layer and the lower layer, and a plurality of vertical structural dampers are arranged on the edge of the plane and are used for buffering the heaving inertia effect of the deep draft semi-submersible type offshore converter station on the upper module; (2) the second layer is a cooling equipment layer, converter valve cooling equipment is arranged in the space of the southwest corner and the northwest corner, main transformer cooling equipment is arranged in the space of the northeast corner, and a seawater pump room and water treatment equipment are arranged in the space of the southeast corner; (3) the third layer is an electrical equipment layer, the cylinders on four corners are connected with adjacent supporting upright post cylinders through bypass spaces, the horizontal plane is in a shape of Chinese character hui, the heights of the supporting upright post cylinders and the bypass spaces on the layer are 2 times of those of other layers, a moon pool can be formed, a water body surrounded by the layer structure is utilized to form a buffer effect on horizontal inertial load, two main transformers are arranged in the centers of the east side bypass and the north side bypass, two GIS and secondary AC equipment rooms are arranged in the west side bypass and the corner spaces, storage batteries and emergency power distribution centers are arranged in the corner spaces of the north side bypass and the south side bypass, a public AC secondary room and a central control room are arranged in the south side, and hoisting and equipment carrying areas are arranged at the positions of the main transformers and the GIS; (4) the fourth layer is a power layer, and three diesel generators and a station power center are respectively arranged in four corner spaces; (5) the fifth layer is a heating ventilation and water supply and drainage layer, and four corner spaces are respectively provided with a water pump room and a heating ventilation machine room.
4. The deep draft semi-submersible offshore converter station of claim 1, wherein: the horizontal plane of the lower floating body is in a shape of Chinese character hui or #, a plurality of separated ballast water tanks are arranged inside the lower floating body and used for adjusting the draught of the platform, and mooring and positioning control chambers are arranged in the four corner spaces.
5. The deep draft semi-submersible offshore converter station of claim 1, wherein: the mooring anchoring system consists of an anchor machine, a cable guider, anchor chains and an anchor body, and is respectively arranged at four corners of a lower floating body of the deep draft semi-submersible type offshore converter station, and each corner point is provided with 3 anchor chains which are arranged in a 4 multiplied by 3 manner, so that the permanent mooring requirement of the deep draft semi-submersible type offshore converter station is met; the anchor machine has the function of adjusting the length of the anchor chain and provides different positioning performances under different service working conditions; the direction of the anchor chain is adjusted through the cable guide device, and the load borne by the converter station is transmitted to the anchor body arranged on the seabed; the anchor body is pre-installed in an engineering sea area, and a gripping anchor, a suction anchor, a pile foundation or a gravity anchor can be selected according to the field condition.
6. The deep draft semi-submersible offshore converter station of claim 1, wherein: the main body part comprises an upper module, four supporting columns, a bypass space, a lower floating body and a mooring anchor system.
7. The deep draft semi-submersible offshore converter station of claim 1, wherein: the draft of the deep draft semi-submersible offshore converter station can be adjusted according to different conditions: during normal operation, the change of the sea level is positioned in the range of the electrical equipment layer in the support upright post, and the lower layers are positioned in the water surface and are always in a deep draft state; when equipment is overhauled, good weather conditions are selected, ballast water is reduced, so that the electrical equipment layer of the upright post can float out of the water surface, and the equipment is carried through the hoisting platform; when the storm self-storage state, ballast water is added, so that the electrical equipment layer is completely immersed below the water surface, and the overall stability of the platform is improved.
8. The deep draft semi-submersible offshore converter station of claim 1, wherein: the supporting submarine cables of the mooring cable anchoring system are connected into the upper module through J-shaped pipes arranged on the support upright posts and the inner side walls of the lower floating body in the shape of a Chinese character 'hui'; necessary ship-leaning facilities are arranged on the outer side wall of the square-back shape within the range of the electrical equipment layer in the supporting upright post.
9. The deep draft semi-submersible offshore converter station of claim 1, wherein: and the outer surfaces of all parts of the structure of the deep draft semi-submersible offshore converter station are subjected to anti-corrosion and anti-seepage design treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911119018.2A CN110844012B (en) | 2019-11-15 | 2019-11-15 | Deep draft semi-submersible offshore converter station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911119018.2A CN110844012B (en) | 2019-11-15 | 2019-11-15 | Deep draft semi-submersible offshore converter station |
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| Publication Number | Publication Date |
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| CN110844012A true CN110844012A (en) | 2020-02-28 |
| CN110844012B CN110844012B (en) | 2024-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911119018.2A Active CN110844012B (en) | 2019-11-15 | 2019-11-15 | Deep draft semi-submersible offshore converter station |
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