CN106602544A - Electrical system of transformer substation - Google Patents
Electrical system of transformer substation Download PDFInfo
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- CN106602544A CN106602544A CN201510675298.0A CN201510675298A CN106602544A CN 106602544 A CN106602544 A CN 106602544A CN 201510675298 A CN201510675298 A CN 201510675298A CN 106602544 A CN106602544 A CN 106602544A
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Abstract
The invention relates to the technical field of transformer substations, in particular to an electrical system. The electrical system of a transformer substation comprises two transformers, wherein the two transformers are 40MVA on-load voltage regulating transformers and are regulated to be a first transformer of a 110KV voltage class and a second transformer of a 10KV voltage class connected with the first transformer respectively. Two outgoing lines are arranged at the first transformer side which adopts a bridge connection mode. Twenty outgoing lines are arranged at the second transformer side which adopts a sectionalized single-bus connection mode. By adopting the above technical scheme, the electrical system provided by the invention achieves significant advantages of high-efficiency operation and convenient maintenance on the premise that reliability, economical efficiency and flexibility of power supply are ensured.
Description
Technical field
The present invention relates to transformer station's technical field, and in particular to a kind of electrical system.
Background technology
With expanding economy, China's power system construction has become a problem for being worth inquiring into, root
Become according to the development of the Substation Design of national conditions Lai Kan China of the development and China of transformer station of China
Gesture, especially computer techno-stress technology are developed rapidly, and the power transformation technology of power system there has also been new
Leap, China's Substation Design occur in that some new trend.
Due to the new development of the network technologies such as computer, the development of transformer station of China achieves significant progress,
Transformer station of China is increasingly intended to intellectuality, digitized, assembling, automatization.
Foreign countries began to be protected and controlled the new of complex automatic system from the end of the seventies, the beginning of the eighties
Technological development and Test And Research Work.Such as by U.S.'s Westinghouse Electrical Corp. and American Electric Power research institute
(EPRI) the SPCS transforming plant protectings of joint research and development and control complex automatic system.Which is mainly characterized in that：
System typically adopts layered distribution type, and system controls level by standing and element/bay level is constituted, and most of system exists
The communication of control level of standing and element/bay level is connected using star fiber optic, and protective relaying device is transferred on the spot, main
Only have optical cable to contact between control room and voltage power distribution equipment at different levels, no heavy-current control cable enters master control
Room processed, which saves a large amount of control cables, greatly reduce to computer system in main control room and other
The interference of electronic component device, improves operation level and security reliability.
Although transformer station's technology is ripe in terms of some, also in conceptual phase in terms of some, have
A little aspects are in the budding stage.The practice of such as intelligent primary equipment presence maintenance, is still within research
Stage；Intelligent alarm, analysis decision, optimal control, analysis decision etc., all in conceptual phase；Newly
The application on the transformer of type raster pattern temperature is in the budding stage with on-line control system；Intelligent protection
Conceptual phase is in distributed coordination Based Intelligent Control.
The content of the invention
It is an object of the present invention to provide a kind of transformer station's electrical system, solves above technical problem.
Technical problem solved by the invention can employ the following technical solutions to realize：
A kind of transformer station's electrical system, including two transformators, two transformators adopt 40MVA
ULTC, two transformator difference pressure regulation for 110KV electric pressures the first transformator,
Second transformator of the 10KV electric pressures being connected with first transformator；
First transformer side has two to return back out line, and first transformer side adopts Gratz connection mode；
Second transformer side has 20 to return back out line, and second transformer side is connect using sectionalized single busbar connection
Line mode.
When the present invention is in 110KV transformer stations, for 110kV sides because it to supply it is more
A class, two type loads, therefore its requirement has higher reliability.In order in view of the erosion to main transformer
Problem, main transformer do not have extreme high reliability, should not adopt line-transformer-connection mode.From economy
Property, reliability, many factors such as motility consider, Gratz connection, with certain reliability and can
Autgmentability.In addition, transformer station's power supply of the present invention is concentrated mainly on 10kV, because there is first order load, no
Allow interruption maintenance chopper, so need arrange bypass facility, and if 10kV sides connect by double-bus
The bad arrangement electrical equipment of line, mainly no suitable relay protection device, therefore the present invention select to adopt
Use single-trunk segmental wiring mode.
First transformer side preferably adopts internal bridge connection.In the present invention because the first transformator
Only two inlet wires, are one-end substation, and no penetration, simple structure, directly and power supply
When being connected, therefore selecting bridge joint wiring, as internal bridge transmission line of electricity is longer, transformator is infrequently thrown
Cut, penetration less, so in outer bridging line and internal bridge, selecting internal bridge preferable.
The power distribution equipment of first transformer side adopts outer open type distribution, second transformer side
Power distribution equipment adopts withdraw type metal enclosed high-tension switch cabinet.
In the internal bridge of first transformer side, the chopper entered in line side and bridge is preferably adopted
SW3-110G type choppers；
First transformator enters the disconnecting switch of the disconnecting switch and outgoing line side of line side and preferably adopts
The outdoor antifouling earthing type disconnecting switch of GW4-110DW/1250 types.
Second transformator enters line side chopper preferably using the indoor vacuum type open circuit of ZN21-10/3150 types
Device；
Chopper in the second transformator outgoing line side switch cubicle is preferably indoor using ZN21-10/1250 types
Vacuum type chopper；
Second transformator enters the disconnecting switch of line side and preferably adopts GN2-10G/3150 type high_voltage isolations
Switch；
The disconnecting switch of the second transformator outgoing line side is preferably opened using GN2-10/1000 type high_voltage isolations
Close.
The current transformer of the first transformer bus side and the current transformer of outgoing line side are preferably adopted
LCW-110 type current transformers；
The voltage transformer of the first transformer bus side preferably adopts JCC-110 type tandem insulation porcelain casees
Formula outdoor voltage transformer；
The voltage transformer of the first transformator outgoing line side is preferably adopted(old model
For YDR-110) type capacitance type potential transformer.
The second transformer bus side current transformer preferably adopts LBJ-10 column support type current transformers；
The second transformator outgoing line side current transformer, i.e., the current transformer in switch cubicle are preferably adopted
With LDJ-10 type current transformers；
The bus bar side voltage transformer and outgoing line side voltage transformer of second transformator is preferably adopted
The indoor voltage transformer of JDZJ-10 type resin-cast types.
In the present invention, because 110kV side systems are solidly earthed neutral system, in addition, high-tension molten
Disconnected device cost is higher, so 110kV sides do not require the use of fuse, only needs Jing disconnecting switch to be directly grounded.
And the second transformer side, in switch cubicle, fuse type selecting is RN2-10 type high-tension fuses.
Beneficial effect：Due to adopting above-mentioned technical proposal, the present invention ensure power supply reliability, economy,
On the premise of motility, operation is realized efficiently, remarkable advantage easy to maintenance.
Description of the drawings
Fig. 1 is electric main wiring diagram of the present invention.
Specific embodiment
In order that technological means, creation characteristic, reached purpose and effect that the present invention is realized are readily apparent from
Solution, is expanded on further the present invention with reference to being specifically illustrating.
A kind of transformer station's electrical system, including two transformators, two transformators have load using 40MVA
Adjustable transformer, first transformator and first of two transformator difference pressure regulation for 110KV electric pressures
Second transformator of the 10KV electric pressures of transformator connection.The power distribution equipment of the first transformer side is adopted
Outer open type distribution, the power distribution equipment of the second transformer side adopt 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 side
Formula.In the internal bridge of the first transformer side, the chopper entered in line side and bridge is preferably adopted
SW3-110G type choppers.The disconnecting switch that first transformator enters the disconnecting switch and outgoing line side of line side is excellent
Choosing is using the outdoor antifouling earthing type disconnecting switch of GW4-110DW/1250 types.First transformer bus side
The current transformer of current transformer and outgoing line side preferably adopts LCW-110 type current transformers.First
The voltage transformer of transformer bus side is preferably mutual using JCC-110 type tandem insulation porcelain box type outdoor voltages
Sensor.The voltage transformer of the first transformator outgoing line side is preferably adopted(old model is
YDR-110) type capacitance type potential transformer.In the present invention, because 110kV side systems are that neutral point is direct
Earthed system, in addition, high-tension fuse cost is higher, so 110kV sides do not require the use of fuse,
Jing disconnecting switch is only needed to be directly grounded.
With reference to Fig. 1, the second transformer side has 20 to return back out line, and the second transformer side is connect using sectionalized single busbar connection
Line mode.Second transformator enters line side chopper preferably using the indoor vacuum type open circuit of ZN21-10/3150 types
Device.Chopper in second transformator outgoing line side switch cubicle preferably adopts the indoor vacuum of ZN21-10/1250 types
Formula chopper.Second transformator enters the disconnecting switch of line side and preferably adopts GN2-10G/3150 type high_voltage isolations
Switch.The disconnecting switch of the second transformator outgoing line side preferably adopts GN2-10/1000 type high voltage isolators.
Second transformer bus side current transformer preferably adopts LBJ-10 column support type current transformers.Second transformation
Device outgoing line side current transformer, i.e., the current transformer in switch cubicle are preferably mutual using LDJ-10 type electric currents
Sensor.The bus bar side voltage transformer and outgoing line side voltage transformer of the second transformator is preferably adopted
The indoor voltage transformer of JDZJ-10 type resin-cast types.Second transformer side, fuse type selecting in switch cubicle
For RN2-10 type high-tension fuses.
When the present invention is in 110KV transformer stations, for 110kV sides because it to supply it is more
A class, two type loads, therefore its requirement has higher reliability.In order in view of the erosion to main transformer
Problem, main transformer do not have extreme high reliability, should not adopt line-transformer-connection mode.From economy
Property, reliability, many factors such as motility consider, Gratz connection, with certain reliability and can
Autgmentability.In the present invention because the first transformator only has two inlet wires, it is one-end substation, and does not have
When having penetration, simple structure is directly connected with power supply, therefore selecting bridge joint wiring, due to interior bridge
Wiring transmission line is longer, transformator infrequently switching, penetration less, so in outer bridging line and
In internal bridge, select internal bridge preferable.
In addition, transformer station's power supply of the present invention is concentrated mainly on 10kV, because there is first order load, do not allow
Interruption maintenance chopper, so need to arrange bypass facility, and if double bus scheme is pressed not in 10kV sides
Electrical equipment is arranged well, mainly no suitable relay protection device, therefore present invention selection is using single
The bus section mode of connection.
The ultimate principle and principal character and advantages of the present invention of the present invention has been shown and described above.One's own profession
The technical staff of industry it should be appreciated that the present invention is not restricted to the described embodiments, above-described embodiment and explanation
Merely illustrating the principles of the invention described in book, without departing from the spirit and scope of the present invention,
The present invention also has various changes and modifications, and these changes and improvements both fall within claimed invention model
In enclosing.The claimed scope of the invention is by appending claims and its equivalent thereof.
Claims (8)
1. a kind of transformer station's electrical system, including two transformators, it is characterised in that two transformations
Device adopts 40MVA ULTCs, and two transformator difference pressure regulation are 110KV voltages
Second transformator of the 10KV electric pressures of the first transformator of grade and first transformator connection；
First transformer side has two to return back out line, and first transformer side adopts Gratz connection mode；
Second transformer side has 20 to return back out line, and second transformer side is connect using sectionalized single busbar connection
Line mode.
2. a kind of transformer station's electrical system according to claim 1, it is characterised in that described first
Transformer side adopts internal bridge connection.
3. a kind of transformer station's electrical system according to claim 2, it is characterised in that described first
The power distribution equipment of transformer side adopts the power distribution equipment of outer open type distribution, second transformer side to adopt
Withdraw type metal enclosed high-tension switch cabinet.
4. a kind of transformer station's electrical system according to claim 3, it is characterised in that described first
In the internal bridge of transformer side, the chopper entered in line side and bridge adopts SW3-110G type choppers；
First transformator enters the disconnecting switch of the disconnecting switch and outgoing line side of line side and adopts
The outdoor antifouling earthing type disconnecting switch of GW4-110DW/1250 types.
5. a kind of transformer station's electrical system according to claim 3, it is characterised in that described second
Transformator enters line side chopper using the indoor vacuum type chopper of ZN21-10/3150 types；
Chopper in the second transformator outgoing line side switch cubicle adopts the indoor vacuum of ZN21-10/1250 types
Formula chopper；
Second transformator enters the disconnecting switch of line side and adopts GN2-10G/3150 type high voltage isolators；
The disconnecting switch of the second transformator outgoing line side adopts GN2-10/1000 type high voltage isolators.
6. a kind of transformer station's electrical system according to claim 4, it is characterised in that described first
The current transformer of the current transformer and outgoing line side of transformer bus side is mutual using LCW-110 type electric currents
Sensor；
The voltage transformer of the first transformer bus side adopts the box family of JCC-110 type tandem insulation porcelains
External voltage transformer；
The voltage transformer of the first transformator outgoing line side is adoptedType capacitor voltage
Transformer.
7. a kind of transformer station's electrical system according to claim 5, it is characterised in that described second
Transformer bus side current transformer adopts LBJ-10 column support type current transformers；
The second transformator outgoing line side current transformer, i.e., the current transformer in switch cubicle are adopted
LDJ-10 type current transformers；
The bus bar side voltage transformer and outgoing line side voltage transformer of second transformator is adopted
The indoor voltage transformer of JDZJ-10 type resin-cast types.
8. a kind of transformer station's electrical system according to claim 7, it is characterised in that the second transformation
Device side, in switch cubicle, fuse type selecting is RN2-10 type high-tension fuses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510675298.0A CN106602544A (en) | 2015-10-16 | 2015-10-16 | Electrical system of transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510675298.0A CN106602544A (en) | 2015-10-16 | 2015-10-16 | Electrical system of transformer substation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106602544A true CN106602544A (en) | 2017-04-26 |
Family
ID=58554205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510675298.0A Withdrawn CN106602544A (en) | 2015-10-16 | 2015-10-16 | Electrical system of transformer substation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106602544A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108110770A (en) * | 2018-01-23 | 2018-06-01 | 国网江苏省电力有限公司苏州供电分公司 | A kind of transmission system power regulating system |
-
2015
- 2015-10-16 CN CN201510675298.0A patent/CN106602544A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108110770A (en) * | 2018-01-23 | 2018-06-01 | 国网江苏省电力有限公司苏州供电分公司 | A kind of transmission system power regulating system |
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Legal Events
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170426 |
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| WW01 | Invention patent application withdrawn after publication |