CN215897307U - Station electric loop of high-voltage direct current converter station and high-voltage direct current converter station - Google Patents
Station electric loop of high-voltage direct current converter station and high-voltage direct current converter station Download PDFInfo
- Publication number
- CN215897307U CN215897307U CN202121943821.0U CN202121943821U CN215897307U CN 215897307 U CN215897307 U CN 215897307U CN 202121943821 U CN202121943821 U CN 202121943821U CN 215897307 U CN215897307 U CN 215897307U
- Authority
- CN
- China
- Prior art keywords
- port
- distribution device
- power distribution
- station
- bus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004804 winding Methods 0.000 claims abstract description 25
- 238000010248 power generation Methods 0.000 claims description 11
- 238000010276 construction Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
Images
Classifications
-
- 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]
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model belongs to the technical field of high-voltage direct current converter stations, and discloses a station electric loop of a high-voltage direct current converter station and the high-voltage direct current converter station, wherein the loop comprises: a first bus bar, a second bus bar, and a third bus bar; the first bus is connected with the second bus through the first power distribution device, the second bus is connected with the third bus through the second power distribution device, the first bus is connected with the third bus through the third power distribution device, a third port of the first bus is connected with a third winding of a first pole converter transformer in a high-voltage direct-current converter station three-winding form through a fourth power distribution device, and a third port of the third bus is connected with a third winding of a second pole converter transformer in a high-voltage direct-current converter station three-winding form through a fifth power distribution device. Has the advantages that: and the third winding is added on the first pole converter transformer and the second pole converter transformer, so that the investment of a small amount of converter transformers is increased, the investment of transformers for a high-voltage station and the investment of incoming line switch equipment are saved, and the whole scheme is more economic.
Description
Technical Field
The utility model relates to the technical field of high-voltage direct-current converter stations, in particular to a high-voltage direct-current converter station loop and a high-voltage direct-current converter station.
Background
Generally, three loops of power supplies are arranged in the high-voltage direct current converter station, and two loops in the station and one loop outside the station are preferably considered in power supply connection. When the power supply is difficult to be led in the station and the reliable power supply exists outside the station, the fact that the power supply is led out from the station for two times is determined through technical and economic comparison on the premise that one time in the station is guaranteed. Any one-time station power consumption capacity in the station power system can meet the requirement of the maximum calculation load of the whole station.
The in-station power supply leading modes of the converter station mainly include two modes: (1) when an alternating current interconnection transformer is arranged in the converter station, the station power supply is preferably led from a third winding bus of the interconnection transformer; when only one AC interconnection transformer is arranged in the station, the other station is preferably connected with a power supply from a high-voltage distribution device with a lower voltage level; (2) when no AC interconnection transformer is arranged in the converter station, the station power supply should be preferentially led from a high-voltage distribution device in the station, and also can be led from a large group of buses of the filter.
At present, a converter station is mostly connected with a large group of buses of a filter in a leading mode, so that a step-down transformer and low-voltage side equipment of the step-down transformer are conveniently arranged, but voltage fluctuation caused by frequent switching of a small group of filters has a large influence on the voltage quality of a power supply for the station.
When the converter station is connected with a high-voltage distribution device, the high-voltage station generally selects 10kV, the low-voltage station generally selects 380/220V, and the high-voltage direct-current converter station is not provided with an alternating-current interconnection transformer, so that a 500kV or 220kV high-voltage transformer needs to be arranged in the station independently in a mode of connecting with a large group of buses of a high-voltage distribution device or a filter, and the high-voltage transformer is connected with an electric load in the station through two-stage voltage reduction. And the high-voltage transformer needs to be further provided with an oil pool, a firewall, an inlet wire framework, auxiliary equipment and the like, so that the construction cost and time are increased.
Therefore, there is a need for an improvement of the station power loop in the hvdc converter station, which avoids the problem that the use of a high voltage transformer requires additional construction cost and time.
SUMMERY OF THE UTILITY MODEL
The purpose of the utility model is: the utility model provides a new station of high voltage direct current converter station uses electric circuit and high voltage direct current converter station, avoids using the high voltage transformer to need additionally to increase the problem of construction cost and construction time.
In order to achieve the above object, the present invention provides a station electric loop of a high voltage direct current converter station, comprising a first bus, a second bus and a third bus; the first port of the first bus bar is connected with the first port of a first power distribution device, the second port of the first power distribution device is connected with the first port of a second bus bar, the second port of the second bus bar is connected with the first port of a second power distribution device, the second port of the second power distribution device is connected with the first port of a third bus bar, the second port of the first bus bar is connected with the first port of a third power distribution device, and the second port of the third power distribution device is connected; the third port of the first bus is connected with the first port of a fourth power distribution device, the second port of the fourth power distribution device is connected with the third winding of the first pole converter transformer in the form of the three windings of the high-voltage direct-current converter station, the third port of the third bus is connected with the first port of a fifth power distribution device, and the second port of the fifth power distribution device is connected with the third winding of the second pole converter transformer in the form of the three windings of the high-voltage direct-current converter station.
Further, the fourth port of the first bus bar is connected with the first port of the sixth power distribution device, the second port of the sixth power distribution device is connected with the first power distribution room, the fifth port of the first bus bar is connected with the first port of the seventh power distribution device, the second port of the seventh power distribution device is connected with the second power distribution room, the sixth port of the first bus bar is connected with the first port of the eighth power distribution device, and the second port of the eighth power distribution device is connected with the third power distribution room.
Further, a fourth port of the third bus bar is connected with a first port of a ninth power distribution device, a second port of the ninth power distribution device is connected with a fourth power distribution room, a fifth port of the third bus bar is connected with a first port of a tenth power distribution device, a second port of the tenth power distribution device is connected with a fifth power distribution room, a sixth port of the third bus bar is connected with a first port of an eleventh power distribution device, and a second port of the eleventh power distribution device is connected with a sixth power distribution room.
Furthermore, a voltage transformer is respectively arranged on the first bus, the second bus and the third bus.
Further, a seventh port of the first bus bar is connected with a first port of a twelfth power distribution device, and a second port of the twelfth power distribution device is connected with an output end of power generation equipment in the high-voltage direct-current converter station.
Further, a seventh port of the third bus bar is connected with a first port of a thirteenth power distribution device, and a second port of the thirteenth power distribution device is connected with an output end of power generation equipment in the high-voltage direct-current converter station.
Further, a third port of the second bus bar is connected with a first port of a fourteenth power distribution device, and a second port of the fourteenth power distribution device is connected with an off-station power supply of the high-voltage direct-current converter station.
Furthermore, first distribution device, second distribution device and third distribution device are the same, first distribution device is including the electrified display device of first circuit breaker, first current transformer, first electrified display device, first earthing switch, first arrester, second earthing switch and the second that connects gradually.
Furthermore, the fourth power distribution device is the same as the fifth power distribution device, and the fourth power distribution device comprises a third arrester, a third electrified display device, a third grounding switch, a first voltage transformer, a third current transformer and a third circuit breaker which are sequentially connected.
The utility model also discloses a high-voltage direct current converter station and a station electric loop applying the high-voltage direct current converter station.
Compared with the prior art, the station electric loop of the high-voltage direct current converter station and the high-voltage direct current converter station have the advantages that: the third winding is added on the first pole converter transformer and the second pole converter transformer, so that the investment of a small amount of converter transformers is increased, the investment of the transformer for the high-voltage station and the investment of the incoming line switch equipment are saved, the overall scheme is more economic, meanwhile, the installation and test items of the transformer equipment for the high-voltage station are reduced, and the project construction time is shortened. The auxiliary buildings and equipment matched with a transformer oil pool, a firewall, an inlet wire framework, a fire-fighting facility and the like for the high-voltage station are saved, and the corresponding engineering investment is reduced.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a station electric loop of a high-voltage direct-current converter station according to the utility model;
fig. 2 is a schematic circuit connection diagram of a station power loop of a high voltage direct current converter station according to the present invention;
fig. 3 is an enlarged schematic view of a first bus bar and switchgear connection in a station electrical loop of a hvdc converter station in accordance with the present invention;
fig. 4 is an enlarged schematic view of a second bus bar and switchgear connection in a station electrical loop of a hvdc converter station in accordance with the present invention;
fig. 5 is an enlarged schematic view of the connection of a third bus bar to a power distribution unit in a station electrical loop of a hvdc converter station in accordance with the present invention;
fig. 6 is an enlarged schematic view of a first power distribution arrangement in a station electrical loop of a hvdc converter station according to the present invention;
fig. 7 is an enlarged schematic view of a fourth power distribution arrangement in a station electrical loop of a hvdc converter station in accordance with the present invention;
fig. 8 is an enlarged schematic view of a sixth power distribution arrangement in a station electrical loop circuit of a hvdc converter station according to the utility model.
In the figure, 1, a first circuit breaker; 2. a first current transformer; 3. a first charged display device; 4. a first ground switch; 5. a first arrester; 6. a second lightning arrester; 7. a second ground switch; 8. and a second charged display device.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.
Example 1:
referring to fig. 1 and fig. 2, the utility model discloses a station electric loop of a high voltage direct current converter station, comprising a first bus, a second bus and a third bus; the first port of the first bus bar is connected with the first port of a first power distribution device, the second port of the first power distribution device is connected with the first port of a second bus bar, the second port of the second bus bar is connected with the first port of a second power distribution device, the second port of the second power distribution device is connected with the first port of a third bus bar, the second port of the first bus bar is connected with the first port of a third power distribution device, and the second port of the third power distribution device is connected; the third port of the first bus is connected with the first port of a fourth power distribution device, the second port of the fourth power distribution device is connected with the third winding of a converter transformer in the form of a three-winding of a high-voltage direct-current converter station, the third port of the third bus is connected with the first port of a fifth power distribution device, and the second port of the fifth power distribution device is connected with the third winding of the converter transformer in the form of a three-winding of the high-voltage direct-current converter station.
In this embodiment the voltage levels of the first and second windings of the converter station are higher, called high side and medium side windings, and the voltage level of the third winding is lower, called low side winding.
In the embodiment, the third winding is added on the converter transformer, so that the investment of a small amount of converter transformers is increased, the investment of the transformer for the high-voltage station and the investment of the incoming line switch equipment are saved, the overall scheme is more economic, meanwhile, the installation and test projects of the transformer equipment for the high-voltage station are reduced, and the project construction time is shortened.
In this embodiment, referring to fig. 3, the fourth port of the first bus bar is connected to the first port of the sixth power distribution device, the second port of the sixth power distribution device is connected to the first power distribution room, the fifth port of the first bus bar is connected to the first port of the seventh power distribution device, the second port of the seventh power distribution device is connected to the second power distribution room, the sixth port of the first bus bar is connected to the first port of the eighth power distribution device, and the second port of the eighth power distribution device is connected to the third power distribution room.
In this embodiment, referring to fig. 5, the fourth port of the third bus bar is connected to the first port of the ninth power distribution device, the second port of the ninth power distribution device is connected to the fourth power distribution room, the fifth port of the third bus bar is connected to the first port of the tenth power distribution device, the second port of the tenth power distribution device is connected to the fifth power distribution room, the sixth port of the third bus bar is connected to the first port of the eleventh power distribution device, and the second port of the eleventh power distribution device is connected to the sixth power distribution room.
In this embodiment, referring to fig. 1 or fig. 2, a voltage transformer is disposed on each of the first bus bar, the second bus bar and the third bus bar.
In this embodiment, referring to fig. 1 or fig. 2, the seventh port of the first bus bar is connected to the first port of the twelfth switchgear, and the second port of the twelfth switchgear is connected to the output of the power generating equipment in the hvdc converter station.
In this embodiment, referring to fig. 1 or fig. 2, the seventh port of the third bus bar is connected to the first port of the thirteenth power distribution device, and the second port of the thirteenth power distribution device is connected to the output of the power generation equipment in the hvdc converter station.
In this embodiment, the power generation equipment may be diesel power generation equipment, two backup loops of a diesel power generation vehicle are additionally arranged, and under the condition that any one of the power supply in the station and the power supply outside the station fails at the same time, the diesel power generation vehicle can provide a backup power supply for a 10kV bus which loses power, so that a power system for the station can still ensure dual power supply in an N-2 operation mode, and the power supply reliability is improved.
In this embodiment, referring to fig. 4, the third port of the second bus bar is connected to the first port of the fourteenth power distribution device, and the second port of the fourteenth power distribution device is connected to the off-site power supply of the hvdc converter station.
In this embodiment, referring to fig. 6, the first power distribution device, the second power distribution device, and the third power distribution device are the same, and the first power distribution device includes a first circuit breaker 1, a first current transformer 2, a first live display device 3, a first grounding switch 4, a first lightning arrester 5, a second lightning arrester 6, a second grounding switch 7, and a second live display device 8, which are connected in sequence.
In this embodiment, referring to fig. 7, the fourth power distribution device is the same as the fifth power distribution device, and the fourth power distribution device includes a third arrester, a third live display device, a third grounding switch, a first voltage transformer, a third current transformer, and a third circuit breaker, which are connected in sequence.
In this embodiment, referring to fig. 8, the sixth to thirteenth power distribution devices have the same structure and include a fourth arrester, a fourth live display device, a fourth earthing switch, a fourth current transformer, and a fourth circuit breaker, which are connected in sequence.
Components and parts such as circuit breaker, current transformer, electrified display device, earthing switch, arrester, voltage transformer that appear in this embodiment are standardized device, when making up into distribution device, have more the actual need of different circuits and select the device of different models can constitute required distribution device.
The working principle is as follows: in this embodiment, the first bus bar and the third bus bar are working bus bars, and the second bus bar is a standby bus bar. When the bus connector runs normally, the port connecting devices among the first bus, the second bus and the third bus are in an off state, the first bus and the third bus are mutually standby and are connected into a power distribution device on the lower level. When the superior power supply of the first bus fails, the fourth power distribution device is disconnected, the third power distribution device is closed, and the subordinate power distribution device of the first bus is switched to be connected to the third bus. When the superior power supply of the second bus fails, the fifth power distribution device is disconnected, the third power distribution device is closed, and the subordinate power distribution device of the third bus is switched to be connected to the first bus.
In this embodiment, the second bus serves as a backup for the first bus and the third bus, and when both the upper power supplies of the first bus and the third bus have a fault, the fourth and fifth power distribution devices are opened, the first and second power distribution devices are closed, and the lower power distribution devices of the first and third buses are switched to be connected to the second bus.
In this embodiment, the power generation equipment is used as a backup for the first bus, the second bus, and the third bus, and when the upper power supplies of the first bus, the second bus, and the third bus all have a fault, the fourth, the fifth, and the fourteenth power distribution devices are turned off, the twelfth, and the thirteenth power distribution devices are turned on, and the lower power distribution devices of the first, the second, and the third buses are transferred to the power generation equipment.
Example 2:
the utility model also discloses a high-voltage direct current converter station, and a station electric loop of the high-voltage direct current converter station in the embodiment 1 is applied.
To sum up, the embodiments of the present invention provide a station circuit for a high voltage dc converter station and a high voltage dc converter station, which have the following beneficial effects compared with the prior art: the third winding is added on the first pole converter transformer and the second pole converter transformer, so that the investment of a small amount of converter transformers is increased, the investment of the transformer for the high-voltage station and the investment of the incoming line switch equipment are saved, the overall scheme is more economic, meanwhile, the installation and test items of the transformer equipment for the high-voltage station are reduced, and the project construction time is shortened. The auxiliary buildings and equipment matched with a transformer oil pool, a firewall, an inlet wire framework, a fire-fighting facility and the like for the high-voltage station are saved, and the corresponding engineering investment is reduced. Two-circuit standby circuits of the diesel generator car are additionally arranged, and under the condition that any one circuit of the power supply in the station and the power supply outside the station simultaneously have faults, the diesel generator car can provide a standby power supply for a 10kV bus which loses power, so that the power supply system of the station can still ensure the power supply of double power supplies in an N-2 operation mode, and the power supply reliability is improved.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A station electric loop of a high-voltage direct current converter station is characterized by comprising a first bus, a second bus and a third bus; the first port of the first bus bar is connected with the first port of a first power distribution device, the second port of the first power distribution device is connected with the first port of a second bus bar, the second port of the second bus bar is connected with the first port of a second power distribution device, the second port of the second power distribution device is connected with the first port of a third bus bar, the second port of the first bus bar is connected with the first port of a third power distribution device, and the second port of the third power distribution device is connected; the third port of the first bus is connected with the first port of a fourth power distribution device, the second port of the fourth power distribution device is connected with the third winding of the first pole converter transformer in the form of the three windings of the high-voltage direct-current converter station, the third port of the third bus is connected with the first port of a fifth power distribution device, and the second port of the fifth power distribution device is connected with the third winding of the second pole converter transformer in the form of the three windings of the high-voltage direct-current converter station.
2. The station electric loop of the hvdc converter station of claim 1, wherein the fourth port of the first bus bar is connected to the first port of a sixth switchgear, the second port of the sixth switchgear is connected to the first switchgear, the fifth port of the first bus bar is connected to the first port of a seventh switchgear, the second port of the seventh switchgear is connected to the second switchgear, the sixth port of the first bus bar is connected to the first port of an eighth switchgear, and the second port of the eighth switchgear is connected to the third switchgear.
3. The station electrical loop of the hvdc converter station of claim 1, wherein the fourth port of the third bus bar is connected to the first port of a ninth distribution device, the second port of the ninth distribution device is connected to a fourth distribution room, the fifth port of the third bus bar is connected to the first port of a tenth distribution device, the second port of the tenth distribution device is connected to a fifth distribution room, the sixth port of the third bus bar is connected to the first port of an eleventh distribution device, and the second port of the eleventh distribution device is connected to the sixth distribution room.
4. The station electric circuit of the hvdc converter station according to claim 1, wherein a voltage transformer is disposed on each of the first bus bar, the second bus bar and the third bus bar.
5. The station electric loop of the hvdc converter station of claim 1, wherein the seventh port of the first bus bar is connected to the first port of a twelfth switchgear, and the second port of the twelfth switchgear is connected to the output of the power generation equipment in the hvdc converter station.
6. The station electric loop of the hvdc converter station of claim 1, wherein the seventh port of the third bus bar is connected to the first port of a thirteenth power distribution device, and the second port of the thirteenth power distribution device is connected to the output of the power generation equipment in the hvdc converter station.
7. The station electric loop of the hvdc converter station of claim 1, wherein the third port of the second bus bar is connected to the first port of a fourteenth power distribution device, and the second port of the fourteenth power distribution device is connected to an off-station power supply of the hvdc converter station.
8. The station electric circuit of the HVDC converter station of claim 1, wherein the first power distribution device, the second power distribution device and the third power distribution device are the same, and the first power distribution device comprises a first circuit breaker, a first current transformer, a first live display device, a first grounding switch, a first lightning arrester, a second grounding switch and a second live display device which are connected in sequence.
9. The station electric circuit of the HVDC converter station of claim 1, wherein the fourth power distribution device is the same as the fifth power distribution device, and the fourth power distribution device comprises a third arrester, a third live display device, a third grounding switch, a first voltage transformer, a third current transformer and a third circuit breaker, which are connected in sequence.
10. A hvdc converter station, characterized in that a station electric circuit of a hvdc converter station according to any of claims 1-9 is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121943821.0U CN215897307U (en) | 2021-08-18 | 2021-08-18 | Station electric loop of high-voltage direct current converter station and high-voltage direct current converter station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121943821.0U CN215897307U (en) | 2021-08-18 | 2021-08-18 | Station electric loop of high-voltage direct current converter station and high-voltage direct current converter station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215897307U true CN215897307U (en) | 2022-02-22 |
Family
ID=80342947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121943821.0U Active CN215897307U (en) | 2021-08-18 | 2021-08-18 | Station electric loop of high-voltage direct current converter station and high-voltage direct current converter station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215897307U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116031924A (en) * | 2022-12-28 | 2023-04-28 | 中国电力工程顾问集团中南电力设计院有限公司 | Current transformer station power system wiring and operation method with security section |
-
2021
- 2021-08-18 CN CN202121943821.0U patent/CN215897307U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116031924A (en) * | 2022-12-28 | 2023-04-28 | 中国电力工程顾问集团中南电力设计院有限公司 | Current transformer station power system wiring and operation method with security section |
| CN116031924B (en) * | 2022-12-28 | 2024-04-16 | 中国电力工程顾问集团中南电力设计院有限公司 | Current transformer station power system wiring and operation method with security section |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110460034B (en) | Direct-current power distribution and utilization system and test method thereof | |
| CN211790770U (en) | Original electric power capacity-increasing voltage-stabilizing system of base station | |
| CN109995015A (en) | 220KV two electricity two charging DC system | |
| CN102931587B (en) | Protect supplying electricity and power distribution car | |
| CN212796591U (en) | Rail transit power supply system | |
| CN215897307U (en) | Station electric loop of high-voltage direct current converter station and high-voltage direct current converter station | |
| CN212486196U (en) | Power supply system is synthesized to inside of large-scale coal-electricity integration power station | |
| CN212796592U (en) | Rail transit power supply system | |
| CN204992272U (en) | Dual supply massive quantity power supply and high expanded pull -out type measuring equipment that does not repeat of low meter that supplies | |
| CN209642399U (en) | A kind of 10KV power supply-distribution system automatically switching power supply for diesel-driven generator | |
| CN112952796A (en) | Power utilization system wiring of offshore flexible direct current converter station and operation method thereof | |
| CN111342549A (en) | Power supply system is synthesized to inside of large-scale coal-electricity integration power station | |
| CN106941259A (en) | A kind of line segment formula three-phase load unbalance adjustment and boosting loss-reducing and electricity-saving device | |
| CN203481822U (en) | Closed loop power supply model of medium voltage 10 kilovolt power distribution network | |
| CN212586509U (en) | Energy feedback type load testing system | |
| CN214590546U (en) | Multi-mode combined power-taking and energy-supplying module for intelligent circuit breaker | |
| CN210007409U (en) | box-type substation and microgrid connection structure | |
| CN212343023U (en) | Combined electrical apparatus with bypass isolating switch at incoming and outgoing line interval | |
| CN112202190B (en) | Station power screen based on energy storage station and distributed station power system | |
| CN214204282U (en) | A PT central cabinet with bypass quick connection port | |
| CN213585170U (en) | Station Power Screen and Distributed Station Power System Based on Energy Storage Station | |
| CN211790762U (en) | Power distribution system | |
| CN204886390U (en) | High pressure dual power supply's wiring circuit | |
| CN208479185U (en) | A kind of substation's spare phase quick-switching system | |
| CN209948370U (en) | Bypass node type PT cabinet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |