CN110130295B - Offshore wind power flexible direct current transmission converter station bridge arm valve tower layout and offshore platform - Google Patents
Offshore wind power flexible direct current transmission converter station bridge arm valve tower layout and offshore platform Download PDFInfo
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- CN110130295B CN110130295B CN201910257574.XA CN201910257574A CN110130295B CN 110130295 B CN110130295 B CN 110130295B CN 201910257574 A CN201910257574 A CN 201910257574A CN 110130295 B CN110130295 B CN 110130295B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 36
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 10
- 238000013461 design Methods 0.000 description 9
- 238000001816 cooling Methods 0.000 description 7
- 230000017525 heat dissipation Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005404 monopole Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H5/00—Buildings or groups of buildings for industrial or agricultural purposes
- E04H5/02—Buildings or groups of buildings for industrial purposes, e.g. for power-plants or factories
- E04H5/04—Transformer houses; Substations or switchgear houses
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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- H02J3/386—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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- Architecture (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The invention provides an offshore wind power flexible direct current transmission converter station bridge arm valve tower layout and an offshore platform. The valve towers close to the alternating current side and the valve towers close to the direct current side in the convertor station are respectively distributed on at least two platforms, so that the platform area of the offshore platform is small, the space utilization rate is high, and the manufacturing cost is greatly reduced; meanwhile, the scheme enables the alternating current part and the direct current part to be distributed on at least two platforms, so that high voltage and low voltage are separated, the problems of high mutual interference and low safety when a high-voltage system and a low-voltage system are designed and arranged on the same platform are solved, and safe debugging and maintenance are facilitated.
Description
The application is a divisional application of the following applications, the application date of the original application: 2016, 12/08/original application No.: 201611124253.5, title of original application: an offshore wind power flexible direct current transmission converter station bridge arm valve tower layout and an offshore platform.
Technical Field
The invention belongs to the technical field of new energy and electric power engineering, and particularly relates to an offshore wind power flexible direct current transmission converter station bridge arm valve tower layout and an offshore platform.
Background
With continuous progress of scientific technology, offshore wind power generation capacity is gradually enlarged, offshore wind power grid-connected operation becomes the most effective mode for large-scale utilization of wind energy, and development of offshore wind power plants has important significance for solving energy crisis.
The direct current transmission is suitable for large-capacity and long-distance electric energy transmission. With the requirements of longer transmission distance and larger transmission capacity, the direct current transmission plays an important role in the development and utilization of offshore wind farms. Compared with a conventional high-voltage direct-current transmission and voltage source type converter (VSC-HVDC) with two levels and three levels, the offshore wind power flexible direct-current access system based on the Modular Multilevel Converter (MMC) is more suitable for a long-distance and large-scale offshore wind power access system.
The design of the offshore platform is the most critical technology in the high-capacity offshore wind power flexible direct current transmission system, and a plurality of problems exist at present. The main equipment arrangement of an offshore converter station in a flexible direct current transmission system based on a Modular Multilevel Converter (MMC) comprises an alternating current access field area, a converter valve hall, a direct current exit field area and the like. However, since offshore platforms are very expensive, there are strict size requirements for offshore platform layout.
Chinese patent application publication No. CN104652864A discloses an offshore platform for an offshore flexible direct current access system. The platform is provided with an upper deck and a lower deck, wherein a bridge arm reactor area, a converter valve hall, a direct current reactor area and a control room area are arranged in the lower deck. Alternating current electric energy of the offshore wind power station is transmitted to a bridge arm reactor area of a lower deck through a cable, and direct current is output through electrical equipment in a direct current outlet area after being converted by electrical equipment in a converter valve hall. The alternating current area and the direct current area in the offshore platform for the offshore flexible direct current access system are both arranged on the lower deck, the mutual interference is large, the safety is low, the occupied area is large, and the manufacturing cost is extremely high due to the special offshore environment.
Disclosure of Invention
The invention aims to provide an offshore wind power flexible direct current transmission converter station bridge arm valve tower layout and an offshore platform, and aims to solve the problem that the existing offshore platform of the flexible direct current transmission converter station is high in manufacturing cost.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the invention provides an offshore wind power flexible direct current transmission converter station bridge arm valve tower layout, which comprises a four bridge arm valve tower layout scheme:
according to the first layout scheme of the bridge arm valve towers, a plurality of valve towers of the bridge arm are distributed on at least two layers of platforms.
And in the second bridge arm valve tower layout scheme, on the basis of the first bridge arm valve tower layout scheme, the valve towers of each bridge arm are evenly distributed on each layer of platform.
And on the basis of the first bridge arm valve tower layout scheme or the second bridge arm valve tower layout scheme, the valve towers are evenly distributed on two layers of platforms.
The invention also provides an offshore platform of the offshore wind power flexible direct current transmission converter station, which comprises four offshore platform schemes:
the offshore platform scheme I comprises an alternating current introduction part and a current conversion part, wherein the current conversion part comprises a bridge arm, and the offshore platform scheme I is characterized in that a plurality of valve towers of the bridge arm are distributed on at least two layers of platforms.
And in the scheme II of the offshore platform, on the basis of the scheme I of the offshore platform, the valve towers of each bridge arm are evenly distributed on each layer of platform.
And on the basis of the scheme I of the offshore platform or the scheme II of the offshore platform, the valve towers are evenly distributed on the two layers of platforms.
The invention has the beneficial effects that: according to the offshore wind power flexible direct current transmission converter station bridge arm valve tower layout and the offshore platform, the valve tower close to the alternating current side and the valve tower close to the direct current side in the converter station are respectively distributed on at least two platforms, so that the offshore platform is small in area and high in space utilization rate, and the manufacturing cost is greatly reduced; meanwhile, the scheme enables the alternating current part and the direct current part to be distributed on at least two platforms, so that high voltage and low voltage are separated, the problems of high mutual interference and low safety when a high-voltage system and a low-voltage system are designed and arranged on the same platform are solved, and safe debugging and maintenance are facilitated.
Drawings
FIG. 1 is a wiring diagram of an offshore wind power sending-out MMC system;
FIG. 2 is a three-dimensional overall schematic diagram of an offshore platform of an offshore wind power flexible direct current transmission converter station;
FIG. 3 is a layout diagram of a top platform device of an offshore platform of an offshore wind power flexible direct current transmission converter station;
FIG. 4 is a layout diagram of a layer platform device in an offshore platform of an offshore wind power flexible direct current transmission converter station;
FIG. 5 is a layout diagram of an offshore platform device of an offshore wind power flexible direct current transmission converter station.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
The embodiment of the offshore platform of the offshore wind power flexible direct current transmission converter station comprises the following steps:
fig. 1 shows a wiring diagram of an offshore wind power sending-out MMC system. The marine wind power sending-out MMC system adopts a symmetrical monopole (pseudo-dipole) topological structure, can effectively reduce the areas of converter station equipment and an offshore platform, and has better economical efficiency.
The marine converter station main equipment of the MMC system comprises: the converter comprises a coupling transformer, a bridge arm reactor, a converter valve, a direct current reactor, converter valve cooling equipment, control system equipment and corresponding switch and protection equipment. The converter valve is the main equipment of the offshore platform, the conversion function in the converter station is completed by 6 phase units, and each phase unit consists of a plurality of valve towers. Wherein, every looks unit has N valve tower, and according to being close to the side of alternating current for No. 1 valve tower, being close to the side of direct current for No. N valve tower, total 6N valve towers on the platform, every valve tower comprises a plurality of submodule pieces.
Through carrying out reasonable design to offshore platform, carry out reasonable layout with above-mentioned MMC system marine converter station's main equipment. Fig. 2 shows a three-dimensional general schematic diagram of an offshore wind power flexible direct current transmission converter station.
The offshore platform of the flexible direct current transmission converter station for offshore wind power transmission is divided into three layers, and the three layers are sequentially from bottom to top in a graph 2: the three-layer steel structure building is combined together to form the offshore platform. The bottom of the three-layer steel structure building is a deck formed by a plurality of steel plates, each layer of the steel structure platform is divided into a plurality of functional rooms, and each functional room is designed to be different in height according to equipment. As shown in fig. 2, the converter valve cooling device room 3 is slightly lower in height than the junction transformer room 2, and the room height of the weak current region such as the first control device and auxiliary device region 4 is lower.
A connecting transformer, converter valve cooling equipment and alternating current access equipment are arranged on a top-layer platform of the offshore platform; the middle-layer platform and the bottom-layer platform are mainly used for placing equipment with converter valves and the like which are heavier in ratio, the middle-layer platform is used for placing bridge arm reactors, and the bottom-layer platform is used for placing direct current reactors and direct current output equipment; moreover, each layer of platform is provided with a control device and an auxiliary device area at the same position, and the whole offshore platform has no strong current input and output at one side of a weak current area.
Fig. 3 is a layout diagram of a top platform device of an offshore platform of an offshore wind power flexible direct current transmission converter station.
The top platform is divided into four functional rooms, which are respectively: an AC access device and auxiliary device area 1, a connection transformer chamber 2, a converter valve cooling device chamber 3 and a first control device and auxiliary device area 4. After the electric energy of each wind field is collected through the offshore collection system, the alternating current bus is connected to the alternating current access equipment and the auxiliary equipment area 1 on the top layer of the offshore platform, and a lightning arrester, a mutual inductor, switch equipment, protection equipment and the like are arranged in the area.
The converter valve cooling equipment chamber 3 is mainly used for placing water cooling equipment, valve cooling heat dissipation equipment and the like in the valve. The design of heat dissipation is convenient for on the top layer, moreover, can make full use of the big design of outer cold of going to sea wind, make full use of natural resources, and the influence is minimum to other equipment. The connecting transformer chamber 2 is used for placing a transformer and corresponding equipment, the transformer is formed by three single-phase transformers, a transformer network side alternating current bus enters the connecting transformer chamber 2 from the alternating current access equipment and the auxiliary equipment area 1 through a sleeve, and a transformer valve side bus is downwards accessed to the middle layer platform through the sleeve. Wherein, the connection transformer chamber 2 adopts materials convenient for heat dissipation, and the heat dissipation design is fully carried out by the sea wind.
Fig. 4 is a layout diagram of a layer platform device in an offshore platform of an offshore wind power flexible direct current transmission converter station.
The middle platform is divided into three functional rooms, which are respectively: a bridge arm reactor chamber 5, a front end valve hall 6 and a second control equipment and auxiliary equipment area 7. After the valve side alternating current bus enters the bridge arm reactor, the three-phase bus is branched into alternating current side incoming lines of six phase units, and then the alternating current side incoming lines are connected to an alternating current side terminal of the bridge arm reactor.
Fig. 5 is a layout diagram of an offshore platform bottom platform device of an offshore wind power flexible direct current transmission converter station.
The bottom platform is divided into five functional rooms, which are respectively: a third control equipment and auxiliary equipment area 12, a rear end valve hall 11, a positive pole direct current reactor chamber 8, a negative pole direct current reactor chamber 9, and a direct current switch and output equipment area 10.
Because converter valve quantity is than many in the large capacity MMC system, design two valve halls in offshore platform: namely the front valve hall 6 at the middle deck and the rear valve hall 11 at the bottom deck. The front end valve hall 6 is connected to the bridge arm reactor room 5. The converter valves in the valve hall are arranged according to a six-phase unit wiring mode, six buses led out from the bridge arm reactor chamber 5 enter the front end valve hall 6 through a sleeve, and the front end valve hall 6 leads out six buses at a position close to the direct current side and is downwards connected to the bottom layer platform through the sleeve. Two direct current buses led out from the rear end valve hall 11 respectively enter the positive direct current reactor chamber and the negative direct current reactor chamber to be connected with the direct current reactors. The direct current switch and the output equipment area are mainly used for placing a direct current side lightning arrester, switch equipment, measuring equipment, related direct current output equipment and the like. The valve hall is divided into a front valve hall and a rear valve hall according to a topological structure by the platform, so that the area of the offshore platform is effectively reduced.
The specific valve tower design in the valve hall is as follows:
when the number of the valve towers on each bridge arm is even, the number of the valve towers in the front valve hall and the rear valve hall is equal. For example: when N is 6, the platform is provided with 36 valve towers, wherein the valve towers No. 1-3 of each bridge arm are positioned in the front valve hall, namely positioned on the middle-layer platform; no. 4-6 valve towers of each bridge arm are positioned in the rear valve hall, namely positioned on the bottom platform. The tail ends of the 3 No. 6 valve towers of the upper bridge arm are connected to form a positive bus, and the tail ends of the 3 No. 6 valve towers of the lower bridge arm are connected to form a negative bus.
When the number of the valve towers on each bridge arm is odd, the number of the valve towers in the front valve hall and the rear valve hall can be close to each other as much as possible in order to reduce the area of the offshore platform. For example: when N is 5, the platform is provided with 30 valve towers, wherein the valve towers No. 1-2 of each bridge arm are positioned in the front valve hall, namely positioned on the middle-layer platform; and the No. 3-5 valve tower of each bridge arm is positioned in the rear valve hall, namely positioned on the bottom platform. The tail ends of the 3 No. 5 valve towers of the upper bridge arm are connected to form a positive bus, and the tail ends of the 3 No. 5 valve towers of the lower bridge arm are connected to form a negative bus.
The same position of each layer is provided with a control device and an auxiliary device area, namely a weak current area, and the whole platform has no strong current input and output in the weak current area, so that the installation, debugging and maintenance are convenient; the space utilization can also be improved.
The platform can be integrally hoisted to an offshore platform, and equipment with large weight is designed in a bottom steel structure building, so that the platform is convenient to install and transport.
In addition, the core of the invention is to provide an offshore wind power flexible direct current transmission converter station bridge arm valve tower layout, wherein a plurality of valve towers of the bridge arm are distributed on at least two layers of platforms.
The offshore platform of the offshore wind power flexible direct current transmission converter station is a specific implementation method for realizing layout of bridge arm valve towers of the offshore wind power flexible direct current transmission converter station. The design for realizing the layout of the bridge arm valve tower is not limited to the design of the offshore platform.
The above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and after reading the present application, those skilled in the art will make various modifications or alterations of the present invention with reference to the above embodiments within the scope of the claims of the present patent application.
Claims (4)
1. The layout is characterized in that the offshore wind power flexible direct current transmission converter station is a three-phase six-bridge-arm converter station, a plurality of valve towers of each bridge arm are distributed on two layers of platforms, a valve tower close to the alternating current side is placed in one layer of platform, a valve tower close to the direct current side is placed in the other layer of platform, the two layers of platforms are a middle layer platform and a bottom layer platform respectively, the bottom layer platform is located below the middle layer platform, and decks are formed by a plurality of steel plates at the bottoms of the middle layer platform and the bottom layer platform.
2. The offshore wind power flexible direct current transmission converter station bridge arm valve tower layout of claim 1, characterized in that the valve towers of each bridge arm are evenly distributed on each layer of platform.
3. The offshore platform of the offshore wind power flexible direct current transmission converter station comprises an alternating current introduction part and a current conversion part, wherein the current conversion part comprises six three-phase bridge arms, and is characterized in that a plurality of valve towers of each bridge arm are distributed on two layers of platforms, a valve tower close to the alternating current side is arranged in one layer of platform, a valve tower close to the direct current side is arranged in the other layer of platform, the two layers of platforms are respectively a middle layer platform and a bottom layer platform, the bottom layer platform is positioned below the middle layer platform, and the bottoms of the middle layer platform and the bottom layer platform form a deck by a plurality of steel plates.
4. The offshore platform for the offshore wind power flexible direct current transmission converter station according to claim 3, wherein valve towers of each bridge arm are evenly distributed on each layer of platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910257574.XA CN110130295B (en) | 2016-12-08 | 2016-12-08 | Offshore wind power flexible direct current transmission converter station bridge arm valve tower layout and offshore platform |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910257574.XA CN110130295B (en) | 2016-12-08 | 2016-12-08 | Offshore wind power flexible direct current transmission converter station bridge arm valve tower layout and offshore platform |
| CN201611124253.5A CN106685240B (en) | 2016-12-08 | 2016-12-08 | Offshore wind power flexible DC power transmission converter station bridge arm valve tower layout and offshore platform |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611124253.5A Division CN106685240B (en) | 2016-12-08 | 2016-12-08 | Offshore wind power flexible DC power transmission converter station bridge arm valve tower layout and offshore platform |
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| Publication Number | Publication Date |
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| CN110130295A CN110130295A (en) | 2019-08-16 |
| CN110130295B true CN110130295B (en) | 2021-05-18 |
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| CN201910257574.XA Active CN110130295B (en) | 2016-12-08 | 2016-12-08 | Offshore wind power flexible direct current transmission converter station bridge arm valve tower layout and offshore platform |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109510246A (en) * | 2019-01-07 | 2019-03-22 | 南京南瑞继保电气有限公司 | A kind of offshore wind farm direct current grid-connected system |
| CN110137838A (en) * | 2019-05-24 | 2019-08-16 | 中国电建集团华东勘测设计研究院有限公司 | A kind of modular sea change of current station structure |
| CN111426910B (en) * | 2020-04-03 | 2022-06-28 | 南京南瑞继保电气有限公司 | Test system and test method for flexible direct-current transmission converter station |
| CN113162103B (en) * | 2021-04-27 | 2022-06-28 | 中国电建集团华东勘测设计研究院有限公司 | Flexible direct current offshore converter station |
| CN114604378A (en) * | 2022-03-17 | 2022-06-10 | 中国能源建设集团广东省电力设计研究院有限公司 | Valve hall structure system of offshore converter station |
| CN116054231A (en) * | 2023-01-31 | 2023-05-02 | 中国华能集团清洁能源技术研究院有限公司 | Double-layer arrangement structure and method for valve hall of offshore flexible direct-current platform |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2645552B1 (en) * | 2012-02-09 | 2020-04-22 | Hitachi, Ltd. | Switching element, power converter, direct current transmission system, current control device, method of controlling power converter, and method of controlling current in voltage source converter |
| CN203645559U (en) * | 2014-01-02 | 2014-06-11 | 常州博瑞电力自动化设备有限公司 | Flexible dc power-transmission converter valve tower based on voltage-source current transformers |
| CN203851003U (en) * | 2014-04-09 | 2014-09-24 | 许继电气股份有限公司 | Converter valve assembly and valve tower employing same |
| CN203984256U (en) * | 2014-05-21 | 2014-12-03 | 许继电气股份有限公司 | Flexible DC power transmission case room formula converter valve device and valve tower |
| CN104652864B (en) * | 2015-02-13 | 2017-01-11 | 国家电网公司 | Offshore platform for offshore wind power flexible direct current connecting-in system |
| CN204741284U (en) * | 2015-06-25 | 2015-11-04 | 常州博瑞电力自动化设备有限公司 | Flexible direct current change of current valve gear based on container |
| CN104953860B (en) * | 2015-07-09 | 2018-01-16 | 中国海洋石油总公司 | A kind of container-type flexible direct current change of current valve gear |
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| CN106685240B (en) | 2019-03-05 |
| CN106685240A (en) | 2017-05-17 |
| CN110130295A (en) | 2019-08-16 |
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