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
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- 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
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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
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Abstract
本实用新型属于高压直流换流站技术领域，公开了一种高压直流换流站的站用电回路及高压直流换流站，所述回路包括：第一母线、第二母线和第三母线；第一母线通过第一配电装置和第二母线连接，第二母线通过第二配电装置和第三母线连接，第一母线通过第三配电装置和第三母线连接，第一母线的第三端口通过第四配电装置和高压直流换流站三绕组形式的第一极换流变压器的第三绕组连接，第三母线的第三端口通过第五配电装置和高压直流换流站三绕组形式的第二极换流变压器的第三绕组连接。有益效果：在第一极和第二极换流变压器上增加第三绕组，增加少量换流变压器的投资，节省了高压站用变及进线开关设备的投资，使整体方案更加经济。
The utility model belongs to the technical field of high-voltage direct current converter stations, and discloses a station electric circuit of a high-voltage direct-current converter station and a high-voltage direct-current converter station. The circuit comprises: a first busbar, a second busbar and a third busbar; The first busbar is connected to the second busbar through the first power distribution device, the second busbar is connected to the third busbar through the second power distribution device, the first busbar is connected to the third busbar through the third power distribution device, and the first busbar is connected to the third busbar through the third power distribution device. The three ports are connected through the fourth power distribution device and the third winding of the first-pole converter transformer in the form of three windings of the HVDC converter station, and the third port of the third busbar is connected through the fifth power distribution device and the third winding of the HVDC converter station. The third winding of the second-pole converter transformer in the form of a winding is connected. Beneficial effects: The third winding is added on the first-pole and second-pole converter transformers, which increases the investment of a small amount of converter transformers, saves the investment of high-voltage station transformers and incoming switch equipment, and makes the overall scheme more economical.
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)
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 |
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| 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 |
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| CN215897307U true CN215897307U (en) | 2022-02-22 |
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| 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 |
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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 |
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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 |
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