CN204967265U - Electric system of transformer substation - Google Patents
Electric system of transformer substation Download PDFInfo
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- CN204967265U CN204967265U CN201520807027.1U CN201520807027U CN204967265U CN 204967265 U CN204967265 U CN 204967265U CN 201520807027 U CN201520807027 U CN 201520807027U CN 204967265 U CN204967265 U CN 204967265U
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- 239000002184 metal Substances 0.000 claims description 3
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- 230000001105 regulatory Effects 0.000 abstract 1
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- 238000005516 engineering process Methods 0.000 description 5
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- 230000005540 biological transmission Effects 0.000 description 2
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- 238000004891 communication Methods 0.000 description 1
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Abstract
The utility model relates to a technical field of transformer substation, concretely relates to electric system. An electric system of transformer substation, includes two transformers, and two transformers all adopt 40MVA on -load voltage -regulating transformer, and two transformers pressure regulating respectively are the first transformer of 110KV electric pressure, the the second transformer of the 10KV electric pressure be connected with first transformer. First transformer side has two kickback lines, and first transformer side adopts the bridge connection mode. The the second transformer side has 20 kickback lines, and the the second transformer side adopts single busbar segmentation mode of connection. Due to the adoption of the technical scheme, the utility model discloses under the prerequisite of guaranteeing service reliability, economic nature, flexibility, realized that the operation is high -efficient, safeguard the convenient advantage that is showing.
Description
Technical field
The utility model relates to transformer station's technical field, is specifically related to a kind of electrical system.
Background technology
Along with expanding economy, China's electric power system construction has become a problem being worth inquiring into, according to the development trend of the Substation Design of the development of transformer station of China and national conditions Lai Kan China of China, especially the developing rapidly of computer techno-stress technology, the power transformation technology of electric power system there has also been new leap, and some new trend has appearred in China's Substation Design.
Due to the new development of the network technologies such as computer, the development of transformer station of China achieves significant progress, and transformer station of China more and more trends towards intellectuality, digitlization, assembling, automation.
Abroad from the end of the seventies, the beginning of the eighties with regard to carry out new technology development and the Test And Research Work of protecting and control complex automatic system.As by U.S.'s Westinghouse Electrical Corp. and American Electric Power research institute (EPRI) joint research and development SPCS transforming plant protecting and control complex automatic system.Its main feature is: system generally adopts layered distribution type; system controls level by standing and element/bay level forms; major part system adopts star fiber optic to be connected in station control level with the communication of element/bay level; protective relaying device is transferred on the spot; optical cable is only had to contact between main control room and voltage power distribution equipment at different levels; heavy-current control cable is not had to enter main control room; which save a large amount of control cables; greatly reduce the interference to computer system in main control room and other electronic component devices, improve operation level and security reliability.
Although transformer station's technology is ripe in some, some aspect is also in conceptual phase, and some aspect is in the budding stage.Such as the practice of intelligent primary equipment presence maintenance, is still in conceptual phase; Intelligent alarm, analysis decision, optimal control, analysis decisions etc., are all in conceptual phase; The application on the transformer of novel grating formula temperature and on-line control system are in the budding stage; Intelligent protection and distributed coordination Based Intelligent Control are in conceptual phase.
Utility model content
The purpose of this utility model is, provides a kind of transformer station electrical system, solves above technical problem.
The technical problem that the utility model solves can realize by the following technical solutions:
A kind of transformer station electrical system, comprise two transformers, two described transformers all adopt 40MVA on-load tap-changing transformer, and two described transformers respectively pressure regulation are the first transformer of 110KV electric pressure, the second transformer of 10KV electric pressure of being connected with described first transformer;
Described first transformer side has two to return back out line, and described first transformer side adopts Gratz connection mode;
Described second transformer side has 20 to return back out line, and described second transformer side adopts single-trunk segmental wiring mode.
When the utility model is used in 110KV transformer station, for 110kV side, because it will supply a more class, two type loads, therefore it requires higher reliability.In order to consider the erosion problem to main transformer, main transformer does not have extreme high reliability, should not adopt line-transformer-connection mode.Consider from many factors such as economy, reliability, flexibilities, Gratz connection, has certain reliability and extensibility.In addition; transformer station of the present utility model power supply mainly concentrates on 10kV; because there is first order load; do not allow interruption maintenance circuit breaker; so need to arrange bypass facility; if and the bad arrangement electric equipment of double bus scheme is pressed in 10kV side, does not mainly have suitable relay protection device, therefore the utility model is selected to adopt single-trunk segmental wiring mode.
Described first transformer side preferably adopts internal bridge connection.Because the first transformer only has two inlet wires in the utility model, for one-end substation, and there is no penetration, structure is simple, directly be connected with power supply, when therefore selecting bridge joint wiring, because internal bridge transmission line is longer, infrequently switching, penetration are little for transformer, so in bridging line outside and internal bridge, select internal bridge better.
The power distribution equipment of described first transformer side adopts outer open type distribution, and the power distribution equipment of described second transformer side adopts withdraw type metal enclosed high-tension switch cabinet.
In the internal bridge of described first transformer side, the circuit breaker on inlet wire side and bridge all preferably adopts SW3-110G type circuit breaker;
The isolating switch of described first transformer inlet wire side and the isolating switch of outgoing line side all preferably adopt the outdoor antifouling earthing type isolating switch of GW4-110DW/1250 type.
Described second transformer inlet wire side circuit breaker preferably adopts the indoor vacuum type circuit breaker of ZN21-10/3150 type;
Circuit breaker in described second transformer outgoing line side switch cubicle preferably adopts the indoor vacuum type circuit breaker of ZN21-10/1250 type;
The isolating switch of described second transformer inlet wire side preferably adopts GN2-10G/3150 type high voltage isolator;
The isolating switch of described second transformer outgoing line side preferably adopts GN2-10/1000 type high voltage isolator.
The current transformer of described first transformer bus side and the current transformer of outgoing line side all preferably adopt LCW-110 type current transformer;
The voltage transformer of described first transformer bus side preferably adopts JCC-110 type tandem insulation porcelain box type outdoor voltage transformer;
The voltage transformer of described first transformer outgoing line side preferably adopts
(old model is YDR-110) type capacitance type potential transformer.
Described second transformer bus side current transformer preferably adopts LBJ-10 column support type current transformer;
Described second transformer outgoing line side current transformer, the current transformer namely in switch cubicle preferably adopts LDJ-10 type current transformer;
The bus bar side voltage transformer of described second transformer and outgoing line side voltage transformer all preferably adopt the indoor voltage transformer of JDZJ-10 type resin-cast type.
In the utility model, because 110kV side system is solidly earthed neutral system, in addition, high-tension fuse cost is higher, so 110kV side does not need to use fuse, and only need through the direct ground connection of isolating switch.
And the second transformer side, in switch cubicle, fuse type selecting is RN2-10 type high-tension fuse.
Beneficial effect: owing to adopting technique scheme, the utility model, under the prerequisite ensureing power supply reliability, economy, flexibility, achieves and runs efficiently, remarkable advantage easy to maintenance.
Accompanying drawing explanation
Fig. 1 is the utility model electric main wiring diagram.
Embodiment
The technological means realized to make the utility model, creation characteristic, reaching object and effect is easy to understand, setting forth the utility model further below in conjunction with concrete diagram.
A kind of transformer station electrical system, comprise two transformers, two transformers all adopt 40MVA on-load tap-changing transformer, and two transformers respectively pressure regulation are the first transformer of 110KV electric pressure, the second transformer of 10KV electric pressure of being connected with the first transformer.The power distribution equipment of the first transformer side adopts outer open type distribution, and the power distribution equipment of the second transformer side adopts withdraw type metal enclosed high-tension switch cabinet.
With reference to Fig. 1, the first transformer side has two to return back out line, and the first transformer side preferably adopts internal bridge connection.In the internal bridge of the first transformer side, the circuit breaker on inlet wire side and bridge all preferably adopts SW3-110G type circuit breaker.The isolating switch of the first transformer inlet wire side and the isolating switch of outgoing line side all preferably adopt the outdoor antifouling earthing type isolating switch of GW4-110DW/1250 type.The current transformer of the first transformer bus side and the current transformer of outgoing line side all preferably adopt LCW-110 type current transformer.The voltage transformer of the first transformer bus side preferably adopts JCC-110 type tandem insulation porcelain box type outdoor voltage transformer.The voltage transformer of the first transformer outgoing line side preferably adopts
(old model is YDR-110) type capacitance type potential transformer.In the utility model, because 110kV side system is solidly earthed neutral system, in addition, high-tension fuse cost is higher, so 110kV side does not need to use fuse, and only need through the direct ground connection of isolating switch.
With reference to Fig. 1, the second transformer side has 20 to return back out line, and the second transformer side adopts single-trunk segmental wiring mode.Second transformer inlet wire side circuit breaker preferably adopts the indoor vacuum type circuit breaker of ZN21-10/3150 type.Circuit breaker in second transformer outgoing line side switch cubicle preferably adopts the indoor vacuum type circuit breaker of ZN21-10/1250 type.The isolating switch of the second transformer inlet wire side preferably adopts GN2-10G/3150 type high voltage isolator.The isolating switch of the second transformer outgoing line side preferably adopts GN2-10/1000 type high voltage isolator.Second transformer bus side current transformer preferably adopts LBJ-10 column support type current transformer.Second transformer outgoing line side current transformer, the current transformer namely in switch cubicle preferably adopts LDJ-10 type current transformer.The bus bar side voltage transformer of the second transformer and outgoing line side voltage transformer all preferably adopt the indoor voltage transformer of JDZJ-10 type resin-cast type.Second transformer side, in switch cubicle, fuse type selecting is RN2-10 type high-tension fuse.
When the utility model is used in 110KV transformer station, for 110kV side, because it will supply a more class, two type loads, therefore it requires higher reliability.In order to consider the erosion problem to main transformer, main transformer does not have extreme high reliability, should not adopt line-transformer-connection mode.Consider from many factors such as economy, reliability, flexibilities, Gratz connection, has certain reliability and extensibility.Because the first transformer only has two inlet wires in the utility model, for one-end substation, and there is no penetration, structure is simple, directly be connected with power supply, when therefore selecting bridge joint wiring, because internal bridge transmission line is longer, infrequently switching, penetration are little for transformer, so in bridging line outside and internal bridge, select internal bridge better.
In addition; transformer station of the present utility model power supply mainly concentrates on 10kV; because there is first order load; do not allow interruption maintenance circuit breaker; so need to arrange bypass facility; if and the bad arrangement electric equipment of double bus scheme is pressed in 10kV side, does not mainly have suitable relay protection device, therefore the utility model is selected to adopt single-trunk segmental wiring mode.
More than show and describe general principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (8)
1. transformer station's electrical system, comprise two transformers, it is characterized in that, two described transformers all adopt 40MVA on-load tap-changing transformer, and two described transformers respectively pressure regulation are the first transformer of 110KV electric pressure, the second transformer of 10KV electric pressure of being connected with described first transformer;
Described first transformer side has two to return back out line, and described first transformer side adopts Gratz connection mode;
Described second transformer side has 20 to return back out line, and described second transformer side adopts single-trunk segmental wiring mode.
2. a kind of transformer station according to claim 1 electrical system, is characterized in that, described first transformer side adopts internal bridge connection.
3. a kind of transformer station according to claim 2 electrical system, is characterized in that, the power distribution equipment of described first transformer side adopts outer open type distribution, and the power distribution equipment of described second transformer side adopts withdraw type metal enclosed high-tension switch cabinet.
4. a kind of transformer station according to claim 3 electrical system, is characterized in that, in the internal bridge of described first transformer side, the circuit breaker on inlet wire side and bridge all adopts SW3-110G type circuit breaker;
The described isolating switch of the first transformer inlet wire side and the isolating switch of outgoing line side all adopt the outdoor antifouling earthing type isolating switch of GW4-110DW/1250 type.
5. a kind of transformer station according to claim 3 electrical system, is characterized in that, described second transformer inlet wire side circuit breaker adopts the indoor vacuum type circuit breaker of ZN21-10/3150 type;
Circuit breaker in described second transformer outgoing line side switch cubicle adopts the indoor vacuum type circuit breaker of ZN21-10/1250 type;
The isolating switch of described second transformer inlet wire side adopts GN2-10G/3150 type high voltage isolator;
The isolating switch of described second transformer outgoing line side adopts GN2-10/1000 type high voltage isolator.
6. a kind of transformer station according to claim 4 electrical system, is characterized in that, the described current transformer of the first transformer bus side and the current transformer of outgoing line side all adopt LCW-110 type current transformer;
The voltage transformer of described first transformer bus side adopts JCC-110 type tandem insulation porcelain box type outdoor voltage transformer;
The voltage transformer of described first transformer outgoing line side adopts
type capacitance type potential transformer.
7. a kind of transformer station according to claim 5 electrical system, is characterized in that, described second transformer bus side current transformer adopts LBJ-10 column support type current transformer;
Described second transformer outgoing line side current transformer, the current transformer namely in switch cubicle adopts LDJ-10 type current transformer;
The bus bar side voltage transformer of described second transformer and outgoing line side voltage transformer all adopt the indoor voltage transformer of JDZJ-10 type resin-cast type.
8. a kind of transformer station according to claim 7 electrical system, is characterized in that, the second transformer side, and in switch cubicle, fuse type selecting is RN2-10 type high-tension fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520807027.1U CN204967265U (en) | 2015-10-16 | 2015-10-16 | Electric system of transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520807027.1U CN204967265U (en) | 2015-10-16 | 2015-10-16 | Electric system of transformer substation |
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| Publication Number | Publication Date |
|---|---|
| CN204967265U true CN204967265U (en) | 2016-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520807027.1U Expired - Fee Related CN204967265U (en) | 2015-10-16 | 2015-10-16 | Electric system of transformer substation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111313302A (en) * | 2020-03-31 | 2020-06-19 | 上海电机学院 | 35kV transformer substation |
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2015
- 2015-10-16 CN CN201520807027.1U patent/CN204967265U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111313302A (en) * | 2020-03-31 | 2020-06-19 | 上海电机学院 | 35kV transformer substation |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160113 Termination date: 20181016 |