CN113162103B - A flexible DC offshore converter station - Google Patents

A flexible DC offshore converter station Download PDF

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Publication number
CN113162103B
CN113162103B CN202110457731.9A CN202110457731A CN113162103B CN 113162103 B CN113162103 B CN 113162103B CN 202110457731 A CN202110457731 A CN 202110457731A CN 113162103 B CN113162103 B CN 113162103B
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field
line
pole
converter
valve hall
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CN113162103A (en
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谢瑞
林斌
徐晗
黄松阁
陈晴
王霄鹤
傅春翔
徐鸥洋
李景一
施朝晖
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PowerChina Huadong Engineering Corp Ltd
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PowerChina Huadong Engineering Corp Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; 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 high-voltage DC [HVDC] links; Arrangements for transfer of electric power between generators and networks via HVDC links
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F17/00—Vertical ducts; Channels, e.g. for drainage
    • E04F17/08—Vertical ducts; Channels, e.g. for drainage for receiving utility lines, e.g. cables, pipes
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; 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
    • H02J3/38—Arrangements for feeding a single network from two or more generators or sources in parallel; Arrangements for feeding already energised networks from additional generators or sources in parallel
    • H02J3/381—Dispersed generators
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2101/00—Supply or distribution of decentralised, dispersed or local electric power generation
    • H02J2101/20—Dispersed power generation using renewable energy sources
    • H02J2101/28—Wind energy
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/20—Climate change mitigation technologies for sector-wide applications using renewable energy

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Power Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

本发明提供了一种柔性直流海上换流站，整个换流站分为上下两层，上层按同一方向依次紧邻设置散热器、换流变室、开关场、中性线阀厅和中性线直流场；下层对应所述中性线阀厅和所述中性线直流场的位置分别设置极性线阀厅和极性线直流场，对应所述换流变室的位置被分为两层上下布置交流场和电缆层，对应所述开关场的位置则布置为第一辅助生产区；每层空间通过中间的走廊呈对称布局从而所述换流站形成真双极四阀厅四直流场格局。本发明整体结构紧凑、相比同样容量的柔性直流海上换流站具有更小的尺寸和体积，从而可以有效节省传统深远海风电场中海上升压站的投资及维护费用，降低深远海风电场的建设成本。

Figure 202110457731

The invention provides a flexible DC offshore converter station. The whole converter station is divided into upper and lower layers, and the upper layer is provided with a radiator, a converter conversion chamber, a switch field, a neutral line valve hall and a neutral line in the same direction. DC field; the lower layer corresponding to the neutral line valve hall and the neutral line DC field are respectively provided with polar line valve hall and polar line DC field, and the position corresponding to the converter chamber is divided into two layers The AC field and the cable layer are arranged up and down, and the position corresponding to the switch field is arranged as the first auxiliary production area; the space on each floor is symmetrically arranged through the middle corridor, so that the converter station forms a true bipolar four valve hall four DC field pattern. The overall structure of the invention is compact, and compared with the flexible DC offshore converter station of the same capacity, the size and volume are smaller, so that the investment and maintenance cost of the offshore booster station in the traditional deep-sea wind farm can be effectively saved, and the construction of the deep-sea wind farm can be reduced. cost.

Figure 202110457731

Description

Flexible direct current offshore converter station
Technical Field
The invention relates to the technical field of offshore wind power and flexible direct current transmission.
Background
In recent years, global offshore wind power development shows a far-sea development trend, compared with offshore near-distance offshore wind power, deep and far-sea wind power with the offshore distance of more than 100km and the water depth of more than 50m has higher wind speed, has less limitation on environmental noise, magnetic waves and landscape influence, and has huge wind energy resources and wide sea area resources, so the deep and far-sea wind power becomes an important direction for future offshore wind power development.
At present, the grid-connected mode of wind power transmission at deep offshore is mainly divided into two types, namely high-voltage alternating current power transmission and high-voltage direct current power transmission, wherein the high-voltage direct current power transmission adopts a flexible direct current mode. For a long-distance deep offshore wind power project, the high-voltage alternating-current power transmission has too many limiting factors due to the consideration of the reactive power compensation problem of the line. The remote high-voltage flexible direct-current transmission adopting true double wiring has the advantages of controllable offshore wind power flow and voltage, large transmission capacity, capability of providing reactive support for the system, easiness in forming a multi-terminal direct-current system and the like in the process of sending out the far-sea wind power. Therefore, the real double-wiring long-distance high-voltage flexible direct current transmission is the main direction for carrying out ultra-long-distance offshore wind power construction in the future.
High-voltage flexible direct-current transmission is a new generation of direct-current transmission technology formed by a voltage source converter formed on the basis of fully-controlled power electronic devices. The high-voltage flexible direct-current transmission system can independently change the phase and amplitude of the output voltage of the high-voltage flexible direct-current transmission system, so that the active power and the reactive power output by the high-voltage flexible direct-current transmission system can be conveniently and quickly adjusted. The method has stronger technical advantages in the aspects of improving the stability of the power system, increasing the dynamic reactive power reserve of the system, improving the quality of electric energy, solving the influence of nonlinear load and impact load on the system, ensuring the power supply of sensitive equipment and the like, and is particularly suitable for the aspects of renewable energy grid connection, distributed power generation grid connection, island power supply, large-scale urban power grid power supply and the like.
The high-voltage flexible direct-current converter station with a true bipolar structure consists of an alternating-current field, a converter transformer, a switching field, a connection area, a valve hall, a direct-current field and other areas. Wherein the coupling zone is a region of the flexible dc converter station that couples the ac field power distribution device and the valve hall. The valve hall is a place for discharging the replacement flow valve in the flexible direct current converter station and is a core area in the flexible direct current converter station. The converter valve of the flexible direct current converter station is divided into two converter valve groups of a positive pole and a negative pole, each converter valve group comprises three bridge arms of an A phase, a B phase and a C phase, and a converter valve tower generally adopts a supporting structure and can also adopt a suspension type structure. A power distribution device is a generic term for an electrical device capable of controlling, receiving, and distributing electric energy, and is functionally complete, including electrical equipment having various functions, such as a bus bar, a circuit breaker, a disconnecting switch, a reactor, a lightning arrester, a transformer, a cable, and a measuring instrument, and the like.
In the flexible engineering of directly sending out of open sea wind-powered electricity generation of tradition, mainly adopt monopole symmetry wiring, compare, true bipolar wiring mode has the operation mode diversified, and system reliability is high, advantages such as transport capacity is big. At present, no flexible direct current offshore converter station with true bipolar connection exists.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a true bipolar flexible direct current offshore converter station which is compact in structure, low in manufacturing cost and capable of realizing large-capacity long-distance offshore wind power output.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a flexible direct current offshore converter station is divided into an upper layer and a lower layer, wherein the upper layer is sequentially and adjacently provided with a radiator, a converter transformer chamber, a switch field, a neutral valve hall and a neutral direct current field in the same direction; the lower layer is provided with a polar line valve hall and a polar line direct current field respectively corresponding to the positions of the neutral line valve hall and the neutral line direct current field, the position corresponding to the converter transformer chamber is divided into two layers of alternating current fields and cable layers which are arranged up and down, and the position corresponding to the switch field is arranged as a first auxiliary production area; each floor space is symmetrically arranged through the middle corridor so that the converter station forms a true bipolar four-valve hall four-direct-current field pattern.
Furthermore, the neutral line valve hall is divided into an independent polar I neutral line converter valve hall and a polar II neutral line converter valve hall through a two-layer corridor; the polar line valve hall is divided into an independent polar I polar line converter valve hall and a polar II polar line converter valve hall through a layer of corridor; the polar I polar line converter valve hall is arranged below the polar I neutral line converter valve hall in a facing manner, and the polar II polar line converter valve hall is arranged below the polar II neutral line converter valve hall in a facing manner.
Furthermore, a converter valve tower and a bridge arm are arranged in each valve hall; the converter valve towers are arranged in a phase sequence of "ABC" or "CBA".
Further, the neutral line direct current field is divided into an independent neutral line direct current field I and an independent neutral line direct current field II through a second-layer corridor; the polar line direct current field is divided into an independent polar I polar line direct current field and a polar II polar line direct current field through a layer of corridor; the polar I polar line direct current field is arranged below the polar I neutral line direct current field in a facing manner, and the polar II polar line direct current field is arranged below the polar II neutral line direct current field in a facing manner.
Furthermore, a neutral line direct current field of the pole I is close to a neutral line converter valve hall of the pole I; and the pole II neutral line direct current field is close to the pole II neutral line converter valve hall.
Further, the first sub-production zone is divided into a plurality of layers and each layer is provided with a plurality of compartments.
Further, the first sub-production zone occupies the remaining space between the polar line valve hall and the cable layer and the ac field.
Furthermore, a second auxiliary production area is arranged above the neutral line direct current field, and the sum of the heights of the second auxiliary production area and the neutral line direct current field is the same as the height of the neutral line valve hall.
Furthermore, the converter station is also provided with a cable shaft penetrating through the neutral line direct current field and the polar line direct current field; the cable shafts are positioned at two sides of the tail end of the corridor and used for leading out the direct current submarine cables.
Further, the ac field includes a high voltage gas insulated metal sealed switchgear (GIS); the converter transformer chamber comprises a converter transformer and a power distribution device thereof; the switch field comprises power distribution devices such as an isolating switch, a grounding switch, a lightning arrester, a current measuring device and a voltage measuring device; the neutral line valve hall and the polar line valve hall comprise a converter valve and a power distribution device thereof; the neutral line direct current field and the polar line valve hall comprise bridge arm reactors and direct current distribution devices.
The offshore converter station platform of the technical scheme can not only give full play to the advantage of high-capacity output of the true bipolar wiring flexible direct current, but also has compact integral structure and smaller size and volume compared with a flexible direct current offshore converter station with the same capacity, thereby effectively saving the investment and maintenance cost of an offshore booster station in the traditional deep and far sea wind farm and reducing the construction cost of the deep and far sea wind farm. In addition, each internal space of the technical scheme is reasonably arranged, the region is clearly set, rooms such as an alternating current field, a converter transformer room, a switch yard, a valve hall and a direct current field are compactly arranged, auxiliary production areas are reasonably and intensively arranged, a main cable channel in the converter station is concise and smooth, and equipment in the station is convenient to install, operate and maintain.
Drawings
Fig. 1 is a longitudinal cross-sectional view of the present invention.
Fig. 2 is a cross-sectional view a-a of fig. 1 according to the present invention.
Fig. 3 is a cross-sectional view B-B of fig. 1 according to the present invention.
Fig. 4 is a cross-sectional view taken along line C-C of fig. 1 in accordance with the present invention.
Fig. 5 is a cross-sectional view taken along line D-D of fig. 1 in accordance with the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Reference is made to figure 1. The converter station of the embodiment is mainly divided into an upper layer and a lower layer, wherein the upper layer is sequentially and adjacently provided with a radiator 1200, a converter transformer room 200, a switch field 300, a neutral valve hall 600 and a neutral direct current field 900 according to the same direction; the lower layer is provided with a polar line valve hall 700 and a polar line direct current field 1000 respectively corresponding to the positions of the neutral line valve hall 600 and the neutral line direct current field 800, the position corresponding to the converter transformer room 200 is divided into two layers, an alternating current field 100 and a cable layer 400 are respectively arranged on the upper layer and the lower layer, the position corresponding to the switch yard 300 is arranged as a first auxiliary production area 500, and the first auxiliary production area 500 occupies the residual space between the polar line valve hall 700 and the cable layer 400 as well as between the polar line valve hall 700 and the alternating current field 100. The first sub-production zone 500 is likewise divided into upper and lower levels, with each level being provided with a plurality of compartments. A second sub-production area 800 is also provided above the neutral dc field 900, and the sum of the heights of the second sub-production area 800 and the neutral dc field 900 is the same as the height of the neutral valve hall 600. Therefore, according to the division of the functional areas, each layer is divided into an upper layer and a lower layer at the required position, and therefore the whole converter station is actually arranged in a single-platform four-layer mode. And the middle part of each layer of space is also provided with a corridor, and all functional areas and rooms are symmetrically distributed on two sides of the corridor, so that the converter station forms a four-direct-current field pattern of a true bipolar four-valve hall.
Specifically, the four-valve hall four-direct-current field pattern is embodied as follows: the neutral line valve hall 600 is divided into an independent polar I neutral line valve hall 610 and a polar II neutral line valve hall 620 through the corridor on the floor where the neutral line valve hall is located; the polar line valve hall 700 is divided into an independent polar I polar line valve hall 710 and a polar II polar line valve hall 720 through the corridor of the floor where the polar line valve hall is located; the pole i pole line valve hall 710 is disposed just below the pole i neutral line valve hall 610, and the pole ii pole line valve hall 720 is disposed just below the pole ii neutral line valve hall 620. Similarly, the neutral dc field 900 is divided into independent pole i neutral dc field 910 and pole ii neutral dc field 920 by the floor corridor; the polar line direct current field 1000 is divided into an independent polar I polar line direct current field 1010 and a polar II polar line direct current field 1020 through a corridor where the polar line direct current field is located; the polar I polar line DC field 1010 is arranged below the polar I neutral line DC field 910 in a facing manner, and the polar II polar line DC field 1020 is arranged below the polar II neutral line DC field 920 in a facing manner. The polar i neutral dc field 910 is immediately adjacent to the polar i neutral converter valve hall 610; the pole ii neutral dc field 920 is immediately adjacent to the pole ii neutral converter valve hall 620.
In particular, the converter station is also provided with a cable shaft 1100 passing through the neutral line dc field 900 and the polar line dc field 1000; the cable shaft 1100 is located at both sides of the end of the corridor for direct current submarine cable outgoing.
Reference is made to fig. 2 and 3. The heights of the polar I polar line converter valve hall 710, the polar II polar line converter valve hall 720, the polar I polar line direct current field 1010 and the polar II polar line direct current field 1020 which are divided through the corridor occupy the lower layer height of the whole converter station, wherein the lengths of the polar I polar line converter valve hall 710 and the polar II polar line converter hall 720 are smaller than and approximate to half of the length of the flexible direct current offshore converter station. The lengths of the pole I pole DC field 1010 and the pole II pole DC field 1020 are less than one third of the length of the flexible direct current offshore converter station. A pole I converter valve and a power distribution device thereof are arranged in the pole I pole converter valve hall 710, a pole II converter valve and a power distribution device thereof are arranged in the pole II pole converter valve hall 720, and a pole I bridge arm reactor and a direct current power distribution device thereof, a pole II bridge arm reactor and a direct current power distribution device thereof are correspondingly arranged in the pole I pole direct current field 1010 and the pole II pole direct current field 1020 respectively. The first auxiliary production area 500 is close to one side of the polar valve hall, the height of the upper layer of the first auxiliary production area corresponds to the height of the adjacent alternating current field 100, and secondary control equipment, protective equipment (such as a valve cooling chamber, a seawater pump room, fire protection and the like), a communication screen cabinet, a storage battery and the like are mainly arranged; the height of the lower layer corresponds to the height of the adjacent cable layer 400, and an auxiliary transformer is mainly arranged. Due to the difference in the space requirements of the ac field 100 and the cable layer 400, the length of the ac field 100 in this embodiment is greater than one ninth of the total length of the converter station, and the length of the upper layer of the first sub-production area 500 is slightly smaller than the length of the lower layer. The cable layer 400 is mainly used for routing an ac cable. Through the arrangement of the cable shaft 1100 and the cable layer 400, the direct current cables and the alternating current cables are reasonably arranged, and the problems of safety and reduction of space utilization rate caused by line interference are avoided. The ac field 100 is provided with a high voltage gas insulated metal enclosed switchgear (GIS) and a connection transformer, and the ac field 100 is electrically connected to the converter transformer chamber 200 directly above the ac field through a GIL pipe.
Reference is made to fig. 4 and 5. The heights of the polar i neutral line converter valve hall 610 and the polar ii neutral line converter valve hall 620 divided by the corridor occupy the upper level of the whole converter station, the heights of the polar i neutral line direct current field 910 and the polar ii neutral line direct current field 920 occupy three quarters of the upper level of the whole converter station, and the second sub-production area 800 located above the polar i neutral line direct current field 910 and the polar ii neutral line direct current field 920 occupies one quarter of the upper level. The neutral valve hall 600 is aligned in length with the underlying poled line valve hall 700 and the neutral dc field 900 is aligned in length with the underlying poled dc field 1000. The polar I neutral line converter valve hall 610 is internally provided with a polar I neutral line converter valve and a power distribution device thereof, and the polar II neutral line converter valve hall 620 is internally provided with a polar II neutral line converter valve and a power distribution device thereof. A pole I neutral line bridge arm reactor and a direct current distribution device thereof, and a pole II neutral line bridge arm reactor and a direct current distribution device thereof are respectively and correspondingly arranged in a pole I neutral line direct current field 910 and a pole II neutral line direct current field 920. The second auxiliary production area 800 may be disposed with a fresh air room, a refrigeration room, a spare part room, etc. as an auxiliary room.
The height of the switchyard 300 next to the neutral valve hall 600 also occupies the upper level of the converter station and is about a quarter of the length of the converter station. Inside the switch yard 300, there are power distribution devices such as isolating switch, grounding switch, lightning arrester, current measuring device and voltage measuring device, which are connected to the neutral line valve hall 600 and the polar line valve hall 700 through flexible wires and wall conduits.
The height of the converter transformer room 200 next to the switch yard 300 also occupies the height of the upper layer of the converter station, the length of the converter transformer room is the same as that of the alternating current field 100 right below, and a converter transformer and a power distribution device thereof are arranged inside the converter transformer room. The heat radiator 1200 is arranged on the outer side of the converter transformer chamber 200 to guarantee heat dissipation of the converter transformer, and the height of the heat radiator is lower than the height of the upper layer of the converter station. The converter transformer is electrically connected with the switch yard 300 through a wall bushing.
Specifically, in the present embodiment, each valve hall (i.e., pole i neutral line converter valve hall 610, pole ii neutral line converter valve hall 620, pole i pole line converter valve hall 710, and pole ii pole line converter valve hall 720) is provided with three arms of a six-valve tower, and the converter valve towers in each valve hall are arranged in the phase sequence of "ABC" or "CBA". Bridge arm reactors of each direct current field (namely a polar I neutral line direct current field 910, a polar II neutral line direct current field 920, a polar I polar line direct current field 1010 and a polar II polar line direct current field 1020) are arranged in a straight line.
The flexible direct current converter station of the embodiment effectively reduces the construction cost of the deep and distant sea wind power plant through intensive arrangement, the comprehensive benefits remarkably save the construction cost of the deep and distant sea wind power plant, meanwhile, the reliability of the system is improved, high-power wind power can be transmitted, and the comprehensive benefits are remarkable by adopting a true bipolar wiring mode.
It should be noted that the above describes examples of the invention. However, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the present invention, but that various changes and modifications may be made without departing from the scope of the invention, which is defined by the appended claims.

Claims (8)

1.一种柔性直流海上换流站，其特征在于整个换流站分为上下两层，上层按同一方向依次紧邻设置散热器、换流变室、开关场、中性线阀厅和中性线直流场；下层对应所述中性线阀厅和所述中性线直流场的位置分别设置极性线阀厅和极性线直流场，对应所述换流变室的位置被分为两层上下布置交流场和电缆层，对应所述开关场的位置则布置为第一辅助生产区；每层空间通过中间的走廊呈对称布局从而所述换流站形成真双极四阀厅四直流场格局；1. A flexible DC offshore converter station is characterized in that the entire converter station is divided into upper and lower layers, and the upper layer is followed by a radiator, a converter chamber, a switch yard, a neutral valve hall and a neutral line in the same direction. Line DC field; the lower layer corresponding to the neutral line valve hall and the neutral line DC field are respectively provided with polar line valve hall and polar line DC field, and the position corresponding to the converter chamber is divided into two parts The AC field and the cable layer are arranged on the upper and lower floors, and the position corresponding to the switch field is arranged as the first auxiliary production area; the space on each floor is symmetrically arranged through the corridor in the middle, so that the converter station forms a true bipolar four-valve hall and four DC field pattern; 所述中性线阀厅通过二层走廊划分为独立的极Ⅰ中性线换流阀厅和极Ⅱ中性线换流阀厅；所述极性线阀厅通过一层走廊划分为独立的极Ⅰ极线换流阀厅和极Ⅱ极线换流阀厅；所述极Ⅰ极线换流阀厅正对地设置在所述极Ⅰ中性线换流阀厅的下方，所述极Ⅱ极线换流阀厅正对地设置在所述极Ⅱ中性线换流阀厅下方；The neutral line valve hall is divided into independent pole I neutral line converter valve halls and pole II neutral line converter valve halls through the corridor on the second floor; the polarity line valve hall is divided into independent valve halls through the corridor on the first floor. The pole I pole line converter valve hall and the pole II pole line converter valve hall; the pole I pole line converter valve hall is arranged directly below the pole I neutral line converter valve hall, and the pole I pole line converter valve hall is directly opposite. The II pole line converter valve hall is arranged directly below the pole II neutral line converter valve hall; 所述第一辅助生产区划分为多层且每层设有多个隔间。The first auxiliary production area is divided into multiple layers and each layer is provided with a plurality of compartments. 2.如权利要求1所述的一种柔性直流海上换流站，其特征在于每个阀厅内设有换流阀塔和桥臂；所述换流阀塔按照“ABC”或“CBA”的相序布置。2. A flexible DC offshore converter station as claimed in claim 1, characterized in that each valve hall is provided with a converter valve tower and a bridge arm; the converter valve tower is in accordance with "ABC" or "CBA" phase sequence arrangement. 3.如权利要求1所述的一种柔性直流海上换流站，其特征在于所述中性线直流场通过二层走廊被划分为独立的极Ⅰ中性线直流场和极Ⅱ中性线直流场；所述极性线直流场通过一层走廊被划分为独立的极Ⅰ极线直流场和极Ⅱ极线直流场；所述极Ⅰ极线直流场正对地设置在所述极Ⅰ中性线直流场下方，所述极Ⅱ极线直流场正对地设置在所述极Ⅱ中性线直流场下方。3. A flexible DC offshore converter station as claimed in claim 1, characterized in that the neutral line DC field is divided into independent pole I neutral line DC field and pole II neutral line through the second-floor corridor DC field; the polar line DC field is divided into independent pole I polar line DC field and pole II polar line DC field through a corridor on the first floor; Below the neutral line DC field, the pole II pole line DC field is disposed directly below the pole II neutral line DC field. 4.如权利要求3所述的一种柔性直流海上换流站，其特征在于所述极Ⅰ中性线直流场紧邻所述极Ⅰ中性线换流阀厅；所述极Ⅱ中性线直流场紧邻所述极Ⅱ中性线换流阀厅。4. A flexible DC offshore converter station according to claim 3, characterized in that the DC field of the neutral line of the pole I is adjacent to the converter valve hall of the neutral line of the pole I; the neutral line of the pole II The DC field is immediately adjacent to the pole II neutral converter valve hall. 5.如权利要求1所述的一种柔性直流海上换流站，其特征在于所述第一辅助生产区占据所述极性线阀厅与所述电缆层及所述交流场之间的剩余空间。5 . The flexible DC offshore converter station according to claim 1 , wherein the first auxiliary production area occupies the remaining part between the polarity line valve hall, the cable layer and the AC field. 6 . space. 6.如权利要求1所述的一种柔性直流海上换流站，其特征在于所述中性线直流场的上方还设有第二辅助生产区，所述第二辅助生产区和所述中性线直流场的高度总和与所述中性线阀厅高度相同。6. A flexible DC offshore converter station according to claim 1, characterized in that a second auxiliary production area is further provided above the neutral line DC field, and the second auxiliary production area and the middle The sum of the height of the neutral line DC field is the same as the height of the neutral line valve hall. 7.如权利要求1所述的一种柔性直流海上换流站，其特征在于所述换流站还设有穿过所述中性线直流场和所述极性线直流场的电缆竖井；所述电缆竖井位于走廊的末端两侧，用于直流海缆出线。7. A flexible DC offshore converter station according to claim 1, characterized in that said converter station is further provided with a cable shaft passing through said neutral line DC field and said polar line DC field; The cable shafts are located on both sides of the end of the corridor for the outlet of the DC submarine cable. 8.如权利要求1所述的一种柔性直流海上换流站，其特征在于所述交流场包括高压气体绝缘金属密封开关设备；所述换流变室包括换流变压器及其配电装置；所述开关场包括隔离开关、接地开关、避雷器、电流测量装置及电压测量装置配电装置；所述中性线阀厅和极性线阀厅包括换流阀及其配电装置；所述中性线直流场和极性线阀厅包括桥臂电抗器及直流配电装置。8. A flexible DC offshore converter station according to claim 1, characterized in that the AC field comprises a high-voltage gas-insulated metal-sealed switchgear; the converter chamber comprises a converter transformer and its power distribution device; The switch yard includes isolation switches, grounding switches, arresters, current measuring devices and voltage measuring devices and power distribution devices; the neutral line valve hall and the polarity line valve hall include a converter valve and its power distribution device; The line DC field and the polarity line valve hall include bridge arm reactors and DC power distribution devices.
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