CN216530581U - Onshore flexible direct current converter station - Google Patents
Onshore flexible direct current converter station Download PDFInfo
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- CN216530581U CN216530581U CN202123017074.0U CN202123017074U CN216530581U CN 216530581 U CN216530581 U CN 216530581U CN 202123017074 U CN202123017074 U CN 202123017074U CN 216530581 U CN216530581 U CN 216530581U
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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
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- 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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Abstract
A land flexible direct current convertor station adopts a true bipolar convertor system with one electrode and two electrodes arranged symmetrically, and comprises an overhead line, wherein the overhead line is sequentially connected with an alternating current distribution area, a convertor transformer area, a starting loop area, a convertor valve area and a direct current distribution area; the outdoor dry-type hollow bridge arm reactor is arranged on the AC side of a bridge arm, and compared with the outdoor dry-type hollow bridge arm reactor arranged on the DC side of the bridge arm, a plurality of DC wall-through sleeves can be saved; except for the converter valve, the bridge arm alternating current side measurement protection device and the bridge arm direct current side measurement protection device, other primary electrical equipment in the onshore flexible direct current converter station are arranged outdoors, so that the construction of a combined building body can be effectively reduced, the construction cost of the converter station is reduced, and the converter station has the advantages of small integral occupied area, low construction cost and the like.
Description
Technical Field
The utility model relates to the technical field of flexible direct current transmission systems, which comprise a flexible direct current converter station and the like. In particular to a land flexible direct current converter station.
Background
Flexible dc transmission technology has found widespread use in europe, and in particular germany. In recent years, the flexible direct current transmission technology in China is developed rapidly. At present, a plurality of flexible direct current transmission projects have been built successively by national grids and south grids. The Kunluo hybrid multi-terminal direct current transmission project is the first extra-high voltage multi-terminal series-parallel flexible direct current transmission project in the world at present, and is also the multi-terminal hybrid flexible direct current transmission project with the highest voltage grade and the largest transmission capacity in the world at present.
With the development of flexible direct current transmission technology, the onshore flexible direct current converter station in China needs to develop towards the direction of excellent arrangement, small occupied area and low cost urgently.
Disclosure of Invention
In order to overcome the problems in the prior art, the utility model aims to provide a land flexible direct current converter station, which is compact and reasonable in overall arrangement of a total plane, clear in functional partition and smooth in connection among distribution devices. The bridge arm reactor of the onshore flexible direct current converter station is arranged on the alternating current side of the bridge arm, and compared with the bridge arm reactor arranged on the direct current side of the bridge arm, a plurality of direct current wall bushing can be saved. Except for the measurement and overvoltage protection devices on the converter valve and the bridge arm, other primary electrical equipment is arranged outdoors, so that the construction of a combined building body can be effectively reduced, the construction cost of the converter station is reduced, and the land flexible direct-current converter station has the advantages of small overall occupied area, low construction cost and the like.
In order to achieve the purpose, the utility model adopts the technical scheme that:
a land flexible direct current convertor station adopts a true bipolar convertor system with a first electrode and a second electrode which are symmetrically arranged; the system comprises an overhead line, wherein the overhead line is sequentially connected with an alternating current distribution area 1, a converter transformer area 2, a starting loop area 3, a converter valve area 4 and a direct current distribution area 5; the power supply input end of the alternating current distribution area 1 is connected with an alternating current overhead incoming line, and the power supply output end of the direct current distribution area 5 is connected with a direct current overhead outgoing line.
The alternating current distribution area 1 comprises outdoor GIS equipment 11, outdoor GIL equipment 12 and a station transformer 13, a power supply input end of the station transformer 13 is connected with an alternating current overhead incoming line, a power supply output end of the station transformer 13 is connected with a power supply input end of the outdoor GIS equipment 11 through the outdoor GIL equipment 12, and a power supply output end of the outdoor GIS equipment 11 is connected with a converter transformer area 2 through the outdoor GIL equipment 12 and an overhead outgoing line respectively;
the converter transformer area 2 comprises a plurality of single-phase double-winding converter transformers 21 and a standby converter transformer 24 which are arranged on a plurality of converter transformer moving tracks 22, adjacent single-phase double-winding converter transformers 21 are separated by fire walls 23, the power supply input end of each single-phase double-winding converter transformer 21 is connected with the alternating current distribution area 1 through a sleeve overhead incoming line, the power supply output end of each single-phase double-winding converter transformer 21 is connected with the power supply input end of the starting loop equipment 31 of the starting loop area 3 through a sleeve overhead outgoing line, the power supply output end of the starting loop equipment 31 is connected with the power supply input end of the outdoor dry type hollow bridge arm reactor 32, and the power supply output end of the outdoor dry type hollow bridge arm 32 penetrates through an alternating current wall-penetrating sleeve 41 of the converter valve area 4 through an overhead line to be sequentially connected with a bridge arm alternating current side measurement protection device 42, a bridge arm alternating current side measurement protection device 42 and a standby protection device 42 in a converter valve hall 46, The converter valve tower 43 and the bridge arm direct current side measurement protection device 45 are used for carrying out phase conversion on the bridge arm direct current side, a direct current output line after phase conversion is connected with a power supply input end of a direct current reactor 51 in the direct current distribution area 5 through a direct current wall bushing 47, and a power supply output end of the direct current reactor 51 is connected with a direct current loop 54 for output through a direct current polar line measurement protection and switch device 55; the phase-changed neutral output line is connected to the power supply input end of the neutral reactor 52 in the dc distribution area through the neutral wall bushing 44, and the power supply output end of the neutral reactor 52 is output through the neutral line measurement protection and switching device 53.
The outdoor GIS equipment 11 comprises a three-phase box separating structure or a three-phase box sharing structure or a bus three-phase box sharing structure and a switch three-phase box separating structure.
The number of the single-phase double-winding converter transformers 21 is at least 6 and is the same as that of the starting loop devices 31.
The starting loop device 31 comprises a measuring, protecting and switching device 311 and a starting resistor 312 which are connected in parallel; each set of starting loop equipment 31 is connected with two outdoor dry type hollow bridge arm reactors 32 in parallel.
Each set of starting loop equipment 31 is connected with two outdoor dry-type hollow bridge arm reactors 32 in parallel; the phase sequence of the outdoor dry-type hollow bridge arm reactor 32 is arranged in a shape like a Chinese character 'ao' or a Chinese character 'yi'.
In the converter valve area 4, each bridge arm comprises 1 to 3 converter valve towers 43, the phase sequence of the converter valve towers 43 is arranged by AABBCC, and the phase sequence of the converter valve towers 43 is consistent with the phase sequence of the alternating-current side wall bushing 41.
The outdoor dry-type hollow bridge arm reactor 32 of the starting loop area 3 is arranged on the bridge arm alternating current side.
The electric equipment outside the converter valve, the bridge arm alternating current side measurement protection device 42 and the bridge arm direct current side measurement protection device 45 are arranged outdoors, the bridge arm alternating current side does not need phase change, and the bridge arm direct current side is provided with a suspension and support switching line for phase change.
And a main control building 48 and an auxiliary control building 48 are arranged between or on two sides of the adjacent valve halls 46 of the converter valves.
Compared with the prior art, the utility model has the beneficial effects that:
the onshore flexible direct current converter station comprises an alternating current power distribution area, a converter transformer area, a starting loop area, a converter valve area, a direct current power distribution area and the like. All the equipment is arranged according to the function subareas, the whole total station total plane is compact and reasonable in overall arrangement, the function subareas are clear, and all the power distribution devices and the connection among the power distribution devices are smooth.
The outdoor dry-type hollow bridge arm reactor 32 of the onshore flexible direct current converter station is arranged on the alternating current side of the bridge arm, and compared with the outdoor dry-type hollow bridge arm reactor arranged on the direct current side of the bridge arm, the outdoor dry-type hollow bridge arm reactor can save a plurality of direct current wall bushing.
The utility model discloses a land flexible direct current converter station, which is characterized in that other primary electrical equipment except a converter valve, a bridge arm alternating current side measurement protection device and a bridge arm direct current side measurement protection device are arranged outdoors. The arrangement of the converter station can effectively reduce the construction of a combined building body, reduce the construction cost of the converter station and enable the converter station to have the advantages of small whole occupied area, low construction cost and the like.
The phase sequence of a converter valve tower 43 of the converter valve area 4 adopts AABBCC arrangement, the phase sequence of the converter valve tower 43 is completely consistent with the phase sequence of an alternating-current side wall bushing, the converter valve tower 43 is directly connected with the corresponding alternating-current wall bushing 41, the alternating-current side does not need phase change, and the connection is smooth.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic structural view of the ac power distribution region 1 of the present invention.
Fig. 3 is a schematic view of the structure of the converter transformer zone 2 of the utility model.
Fig. 4 is a schematic structural diagram of the starting circuit area 3 of the present invention.
Fig. 5 is a schematic view of the structure of the converter valve zone 4 of the utility model.
Fig. 6 is a schematic structural diagram of the dc distribution area 5 of the present invention.
Wherein, 1, an alternating current distribution area; 2. a converter transformer region; 3. starting a loop area; 4. a converter valve area; 5. a direct current distribution area; 11. outdoor GIS equipment; 12. an outdoor GIL device; 13. a station transformer; 21. a single-phase double-winding converter transformer; 22. a converter transformer moving track; 23. a firewall; 24. a standby converter transformer; 31. starting the loop equipment; 32. an outdoor dry-type hollow bridge arm reactor; 311. measuring, protecting and switching devices; 312. starting a resistor; 41. an AC wall bushing; 42. a bridge arm alternating current side measurement protection device; 43. a converter valve tower; 44. a neutral wall bushing; 45. a bridge arm direct current side measurement protection device; 46. a valve hall; 47. a direct current wall bushing; 48. a main and auxiliary control building; 51. a direct current reactor; 52. a neutral reactor; 53. a neutral line measurement protection and switching device; 54. a direct current return line; 55. and a DC polar line measurement protection and switch device.
Detailed Description
The utility model is further described with reference to the following figures and specific examples.
As shown in fig. 1, a land flexible dc converter station adopts a true bipolar converter system with a polar-one and a polar-two symmetric arrangement; the system comprises an overhead line, wherein an alternating current distribution area 1, a converter transformer area 2, a starting loop area 3, a converter valve area 4 and a direct current distribution area 5 are connected with the overhead line for the time; the power supply input end of the alternating current distribution area 1 is connected with an alternating current overhead incoming line, and the power supply output end of the direct current distribution area 5 is connected with a direct current overhead outgoing line.
Referring to fig. 1 and 2, the ac power distribution area 1 includes an outdoor GIS device 11, an outdoor GIL device 12, and a station transformer 13, a power supply input end of the station transformer 13 is connected to an ac overhead incoming line, a power supply output end of the station transformer 13 is connected to a power supply input end of the outdoor GIS device 11 through the outdoor GIL device 12, and a power supply output end of the outdoor GIS device 11 is connected to the converter transformer area 2 through the outdoor GIL device 12 and an overhead outgoing line, respectively.
Referring to fig. 2 to 6, the converter transformer area 2 includes 6 single-phase double-winding converter transformers 21 and one standby converter transformer 24 disposed on a plurality of converter transformer moving tracks 22, adjacent single-phase double-winding converter transformers 21 are separated by a fireproof wall 23, a power supply input end of the single-phase double-winding converter transformer 21 is connected to the ac distribution area 1 by a bushing overhead incoming line, a power supply output end of the single-phase double-winding converter transformer 21 is connected to a power supply input end of a start loop device 31 of the start loop area 3 by a bushing overhead outgoing line, a power supply output end of the start loop device 31 is connected to a power supply input end of an outdoor dry type hollow bridge arm reactor 32, a power supply output end of the outdoor dry type hollow bridge arm reactor 32 passes through an ac wall-penetrating bushing 41 of the converter valve area 4 by an overhead line to be sequentially connected to a bridge arm ac side measurement protection device 42 and a standby bridge arm ac side measurement protection device 46 in a converter valve hall 46, The converter valve tower 43 and the bridge arm direct current side measurement protection device 45 are used for carrying out phase conversion on the bridge arm direct current side, a direct current output line after phase conversion is connected with a power supply input end of a direct current reactor 51 in the direct current distribution area 5 through a direct current wall bushing 47, and a power supply output end of the direct current reactor 51 is connected with a direct current loop 54 for output through a direct current polar line measurement protection and switch device 55; the phase-changed neutral output line is connected to the power supply input end of the neutral reactor 52 in the dc distribution area through the neutral wall bushing 44, and the power supply output end of the neutral reactor 52 is output through the neutral line measurement protection and switching device 53.
The outdoor GIS equipment 11 comprises a three-phase box separating structure or a three-phase box sharing structure or a bus three-phase box sharing structure and a switch three-phase box separating structure.
The number of the single-phase double-winding converter transformers 21 is the same as that of the starting loop devices 31.
The starting loop device 31 comprises a measuring, protecting and switching device 311 and a starting resistor 312 which are connected in parallel; each set of starting loop equipment 31 is connected with two outdoor dry-type hollow bridge arm reactors 32 in parallel, and the whole starting loop area 3 comprises 6 sets of starting loop equipment 31 and 12 outdoor dry-type hollow bridge arm reactors 32.
The phase sequence of the outdoor dry-type hollow bridge arm reactor 32 adopts AABBCC arrangement, delta-shaped arrangement or straight-shaped arrangement.
In the converter valve area 4, each bridge arm comprises 1 to 3 converter valve towers 43, the phase sequence of the converter valve towers 43 is arranged by AABBCC, and the phase sequence of the converter valve towers 43 is consistent with the phase sequence of the alternating-current side wall bushing 41.
The outdoor dry-type hollow bridge arm reactor 32 of the starting loop area 3 is arranged on the bridge arm alternating current side.
The electrical equipment outside the bridge arm alternating current side measurement protection device 42, the converter valve 43 and the bridge arm direct current side measurement protection device 45 is arranged outdoors, the bridge arm alternating current side does not need phase change, and the bridge arm direct current side is provided with a suspension and support switching line for phase change.
A main control building 48 and an auxiliary control building 48 are arranged between or on two adjacent converter valve halls 46, each main control building 48 comprises two control buildings with the same structure, one control building is used, and the other control building is used as a spare control building for protecting all electrical equipment of the converter station; one converter valve hall 46 is provided with 6 sets of bridge arm AC side measurement protection devices 42, a converter valve tower 43 and a bridge arm DC side measurement protection device 45.
The functional subareas of the alternating current distribution area 1, the converter transformer area 2, the starting loop area 3, the converter valve area 4 and the direct current distribution area 5 are separated by roads.
The firewalls 23 are made of concrete or equivalent material.
The working principle of the utility model is as follows:
the AC overhead incoming line is sequentially connected with an AC distribution area 1, a converter transformer area 2, a starting loop area 3, a converter valve area 4 and a DC distribution area 5 and then is output from a DC overhead outgoing line; the alternating current distribution area 1 distributes and conveys the incoming alternating current to the converter transformer area 2 through the outdoor GIS equipment 11 and the outdoor GIL equipment 12, the converter transformer area 2 converts the voltage of the incoming alternating current, the alternating current is converted into direct current through the starting loop area 3 to the converter valve area 4 and then is sent to the direct current distribution area 5 for distribution, and finally the direct current is output through the direct current overhead outgoing line.
Compared with the traditional onshore flexible direct current converter station, the flexible direct current converter station has the advantages that all the equipment is arranged according to the functional subareas, the overall plane of the total station is compact and reasonable in overall arrangement, the functional subareas are clear, and all the power distribution devices and the connection among the power distribution devices are smooth. The bridge arm reactor of the onshore flexible direct current converter station is arranged on the alternating current side of the bridge arm. Compared with the arrangement on the direct current side of the bridge arm, 8 direct current wall bushing can be saved. Except for the converter valve and the measuring and overvoltage protection device on the bridge arm, other primary electrical equipment in the onshore flexible direct current converter station is arranged outdoors. The arrangement of the converter station can effectively reduce the construction of a combined building body, reduce the construction cost of the converter station and enable the converter station to have the advantages of small whole floor area, low construction cost and the like.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (9)
1. A land flexible direct current convertor station adopts a true bipolar convertor system with a first electrode and a second electrode which are symmetrically arranged; the method is characterized in that: the system comprises an overhead line, wherein the overhead line is sequentially connected with an alternating current distribution area (1), a converter transformer area (2), a starting loop area (3), a converter valve area (4) and a direct current distribution area (5); the power supply input end of the alternating current distribution area (1) is connected with an alternating current overhead incoming line, and the power supply output end of the direct current distribution area (5) is connected with a direct current overhead outgoing line;
the alternating current distribution area (1) comprises outdoor GIS equipment (11), outdoor GIL equipment (12) and a station transformer (13), a power supply input end of the station transformer (13) is connected with an alternating current overhead incoming line, a power supply output end of the station transformer (13) is connected with a power supply input end of the outdoor GIS equipment (11) through the outdoor GIL equipment (12), and a power supply output end of the outdoor GIS equipment (11) is connected with the converter transformer area (2) through the outdoor GIL equipment (12) and an overhead outgoing line respectively;
the converter transformer area (2) comprises a plurality of single-phase double-winding converter transformers (21) and a standby converter transformer (24) which are arranged on a plurality of converter transformer moving tracks (22), adjacent single-phase double-winding converter transformers (21) are separated by fire walls (23), the power supply input end of each single-phase double-winding converter transformer (21) is connected with the alternating current distribution area (1) through a sleeve overhead incoming line, the power supply output end of each single-phase double-winding converter transformer (21) is connected with the power supply input end of a starting loop device (31) of the starting loop area (3) through a sleeve overhead outgoing line, the power supply output end of the starting loop device (31) is connected with the power supply input end of an outdoor dry type hollow bridge arm reactor (32), the power supply output end of the outdoor dry type hollow bridge arm reactor (32) penetrates through an alternating current wall-penetrating sleeve (41) of the converter valve area (4) through an overhead line to be sequentially connected with a bridge arm alternating current side measurement protection device in a converter valve hall (46) (42) The converter valve tower (43) and the bridge arm direct current side measurement protection device (45) are used for carrying out phase conversion on the bridge arm direct current side, a direct current output line after phase conversion is connected with a power supply input end of a direct current reactor (51) in a direct current distribution area (5) through a direct current wall bushing (47), and a power supply output end of the direct current reactor (51) is connected with a direct current loop (54) through a direct current polar line measurement protection and switch device (55) for output; the neutral output line after phase conversion is connected with the power supply input end of a neutral reactor (52) in the direct current distribution area through a neutral wall bushing (44), and the power supply output end of the neutral reactor (52) is output through a neutral line measurement protection and switch device (53).
2. A land based flexible dc converter station according to claim 1, characterized by: the outdoor GIS equipment (11) comprises a three-phase box separating structure or a three-phase box sharing structure or a bus three-phase box sharing structure and a switch three-phase box separating structure.
3. A land based flexible dc converter station according to claim 1, characterized by: the number of the single-phase double-winding converter transformers (21) is at least 6 and is the same as that of the starting loop devices (31).
4. A land based flexible dc converter station according to claim 1, characterized by: the starting loop device (31) comprises a measuring device, a protection device, a switching device (311) and a starting resistor (312) which are connected in parallel; each set of starting loop equipment (31) is connected with two outdoor dry type hollow bridge arm reactors (32) in parallel.
5. A flexible direct current converter station on land according to claim 1 or 4, characterized in that: the phase sequence of the outdoor dry type hollow bridge arm reactor (32) adopts AABBCC arrangement, and is arranged in a shape like a Chinese character 'pin' or a straight line.
6. A land based flexible dc converter station according to claim 1, characterized by: in the converter valve area (4), each bridge arm comprises 1-3 converter valve towers (43), the phase sequence of the converter valve towers (43) is arranged in an AABBCC mode, and the phase sequence of the converter valve towers (43) is consistent with that of the alternating-current wall bushing (41).
7. A land based flexible dc converter station according to claim 1, characterized by: the outdoor dry-type hollow bridge arm reactor (32) is arranged on the AC side of the bridge arm.
8. A land based flexible dc converter station according to claim 1, characterized by: and electrical equipment except the bridge arm alternating current side measurement protection device (42), the converter valve tower (43) and the bridge arm direct current side measurement protection device (45) are arranged outdoors, the phase of the bridge arm alternating current side is not changed, and the phase of the bridge arm direct current side is changed.
9. A land based flexible dc converter station according to claim 1, characterized by: and a main control building and an auxiliary control building (48) are arranged between or on two sides of the adjacent converter valve halls (46).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123017074.0U CN216530581U (en) | 2021-12-03 | 2021-12-03 | Onshore flexible direct current converter station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123017074.0U CN216530581U (en) | 2021-12-03 | 2021-12-03 | Onshore flexible direct current converter station |
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| Publication Number | Publication Date |
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| CN216530581U true CN216530581U (en) | 2022-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123017074.0U Active CN216530581U (en) | 2021-12-03 | 2021-12-03 | Onshore flexible direct current converter station |
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| CN (1) | CN216530581U (en) |
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2021
- 2021-12-03 CN CN202123017074.0U patent/CN216530581U/en active Active
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