CN108988365A - A kind of large capacity split-phase type Three-Phase Transformer balance winding outside staggered connection method - Google Patents
A kind of large capacity split-phase type Three-Phase Transformer balance winding outside staggered connection method Download PDFInfo
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- CN108988365A CN108988365A CN201810827242.6A CN201810827242A CN108988365A CN 108988365 A CN108988365 A CN 108988365A CN 201810827242 A CN201810827242 A CN 201810827242A CN 108988365 A CN108988365 A CN 108988365A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
- H01F30/12—Two-phase, three-phase or polyphase transformers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
It is an object of the invention to disclose a kind of large capacity split-phase type Three-Phase Transformer balance winding outside staggered connection method, compared with prior art, eliminate the destruction caused by balance winding support porcelain vase of the powerful electromagnetic force of Transformer Close moment generation, it thoroughly solves the design unreasonable to high-power transformer of transformer production producer, manufacture to power grid and user's bring security risk, further improve large capacity split-phase type transformer safety operation level, larger economic loss has been retrieved for power grid and user, has been achieved the object of the present invention.
Description
Technical field
The present invention relates to a kind of connection method, in particular to a kind of large capacity split-phase suitable for power grid, customer substation
Formula Three-Phase Transformer balances staggered connection method outside winding.
Background technique
In the prior art, large capacity split-phase type Three-Phase Transformer balance winding is mainly the following connection method.
1) large capacity split-phase type Three-Phase Transformer balances winding parallel formula Hard link method.When transformer connection deck label is
When Yyn0, when high-pressure side applies three-phase sine wave voltage, the magnetic flux in iron core will necessarily generate higher harmonic components, wherein 3,
5,7 and 9 subharmonic contents are maximum, and the voltage of Circuit Fault on Secondary Transformer output will be non-sine voltage, influence power quality.Therefore become
Large capacity connection deck label Yyn0 optimization design is Yyn0+d mode by depressor manufacturer, in the wink for starting excitation to transformer
Between, balance higher harmonic components (mainly 3 IV times) synchronization direction phase in three-phase windings in winding non-sinusoidal voltage
Together, along with delta windings are a closed circuits, such higher harmonic components electric current can be in the winding that triangle connects
Circulation, offsets a large amount of higher hamonic wave magnetic fluxs (mainly 3 IV times) caused by power transmission moment.Large capacity split-phase type transformer
Balance winding connection generallys use copper bar or the parallel hard connecting mode of cable.
The shortcomings that this technology is: large capacity split-phase type transformer generates larger excitation surge current in unloaded transmission process, puts down
Weighing apparatus winding disengaging exciting current generate huge electromagnetic force be overlapped mutually, then plus copper bar, cable with balance winding connect category firmly
Connection, electric power can not buffer reduction, be easy to cause balance winding porcelain vase drawing crack, influence power grid and user security steady electricity supply.
2) large capacity split-phase type Three-Phase Transformer balance winding is used for Working winding connection method.To avoid transformer from connecting
When deck label is Yyn0, transformer generates harmonic current and can not eliminate, and influences power quality.Transformer production producer is by large capacity
Split-phase type Optimum Design of Transformers is Yyn0+d mode, while balancing winding for Working winding, not only improves power quality, but also
It can be power grid or customer power supply.
The shortcomings that this technology, is: 1, when large capacity split-phase type design of transformer be assemblied in power supply-distribution system and user head end,
Balance winding voltage grade need to be matched with system voltage grade, cause system configuration not flexible.
2, when as Working winding, if grid voltage three-phase is uneven, central point can be caused to deviate, in addition assembly ground connection
For transformer to stablize central point, transformer will generate additional electrical energy loss, uneconomical.
3) large capacity split-phase type Three-Phase Transformer balance winding is for reactive compensation and filtering connection method.To avoid transformation
When device connection deck label is Yyn0, transformer generates harmonic current and can not eliminate, and influences power quality.Transformer production producer will
Large capacity split-phase type Optimum Design of Transformers is Yyn0+d mode, while balancing winding three-phase and connecing reactive compensation and filter,
Improve power quality and power factor of electric network.
The shortcomings that this technology is: large capacity split-phase type transformer occupied area is larger, and be assemblied in customer power supply head end or
Power grid is powered at hinge, and connection type and layout are complex when balance winding connects reactive compensation and filter, and without
Ji.
It is accordingly required in particular to staggered connection method outside a kind of large capacity split-phase type Three-Phase Transformer balance winding, with
It solves the problems, such as above-mentioned existing.
Summary of the invention
The purpose of the present invention is to provide staggered connections outside a kind of large capacity split-phase type Three-Phase Transformer balance winding
Method uses large capacity split-phase type Three-Phase Transformer to balance winding connection side in power grid, user in view of the deficiencies of the prior art
Formula optimizes, and has effectively evaded and has generated larger excitation surge current in unloaded power transmission because of capacity transformer, electric power is superimposed and can not
Counteracting causes balance winding porcelain vase drawing crack, influences power grid and user security steady electricity supply, solves large capacity split-phase type transformer
Winding support porcelain vase is balanced frequently because of electric power drawing crack, the huge technical problem of influence equipment safety operation.
Technical problem solved by the invention can be realized using following technical scheme:
A kind of large capacity split-phase type Three-Phase Transformer balance winding outside staggered connection method, which is characterized in that it is wrapped
Include following steps:
(1) size and number for determining large capacity split-phase type transformer balance winding three-phase connection bronze medal are measured；
(2) it measures and determines large capacity split-phase type transformer balance winding three-phase connection bronze medal bracket, supports insulative porcelain vase
Size；
(3) it measures and determines that large capacity split-phase type transformer balance winding ontology supports insulative porcelain vase, support porcelain vase extension connect
Head；
(4) measure determine large capacity split-phase type transformer balance winding external connection be flexible coupling, the ruler of down conductor
It is very little；
(5) determine that the size and number of auxiliary material used, auxiliary material include busbar heat-shrinkable T bush, busbar joint box, open air two
Rectangular bus bar fixed hardware fittings (vertical-type), zinc-plated hexagon-headed bolt (full thread), zinc-plated turret head lead to bolt (full thread) and six
Angle head brass bolt.
(6) copper bar bracket, supporting insulator and bronze medal outside fixed large capacity split-phase type transformer balance winding, branch are installed
Frame basis is fixed rear concreting with rivet and is reinforced, and supporting insulator pedestal is fixed with bracket support plate with bolt, bronze medal peace
It is fixed with fixed fitting with supporting insulator after dress thermal shrinkable sleeve；
(7) installation large capacity split-phase type transformer balance winding ontology supporting insulator, insulator extend connector, soft company
It connects, supporting insulator must carry out pedestal sealing when installing, extend connector and be attached by being flexible coupling with external bronze medal, connected
All joints must install bus insulation connector box after the completion；
(8) installation large capacity split-phase type transformer balances winding earth downlead, and down conductor uses zinc-plated bronze medal, connects
Ground downlead is necessarily mounted at transformer balance winding and is flexible coupling at the copper bar of outside.
In one embodiment of the invention, excitation surge current size is calculated according to large capacity form-separating transformer, selection is flat
Weighing apparatus and and connects quantity at winding copper bar width, thickness；According to large capacity split-phase type transformer floor plan and ontology insulating supporting
Copper bar quantity needed for porcelain vase absolute altitude determines.
In one embodiment of the invention, balance winding inlet-outlet line connecting copper bar is further determined that after determining copper bar width
Specific dislocation size, balance winding inlet-outlet line connecting copper bar must all misplace, and there are 1-2cm clearance distances.
In one embodiment of the invention, winding ontology insulating supporting porcelain vase is balanced according to large capacity split-phase type transformer
Absolute altitude, center line, transformer foundation plane absolute altitude, balance winding inlet-outlet line copper bar width and dislocation height determine transformer balance
Inlet-outlet line (copper bar) support frame height, external inlet-outlet line (copper bar) insulating supporting porcelain vase height outside winding.
In one embodiment of the invention, winding ontology insulating supporting porcelain vase is balanced according to large capacity split-phase type transformer
Highly, it balances winding inlet-outlet line copper bar width and dislocation height determines that balance winding ontology insulating supporting porcelain vase connector connector is mended
Repay height.
In one embodiment of the invention, winding ontology insulating supporting porcelain vase is balanced according to large capacity split-phase type transformer
The size that is flexible coupling is determined at a distance from nearest balance winding support；According to balance winding copper bar and transformer bay every nearest earthing pole
Height determines down conductor height.
In one embodiment of the invention, production balance winding inlet-outlet line copper bar bracket, change are measured size according to above
Depressor balance winding external support porcelain vase, being flexible coupling balances winding ontology insulating supporting porcelain vase compensating joint with transformer.
Staggered connection method outside large capacity split-phase type Three-Phase Transformer balance winding of the invention, with prior art phase
Than eliminating the destruction caused by balance winding support porcelain vase of the powerful electromagnetic force of Transformer Close moment generation, thoroughly solving
The design unreasonable to high-power transformer of transformer production producer is manufactured to power grid and user's bring security risk, further
Large capacity split-phase type transformer safety operation level is improved, larger economic loss has been retrieved for power grid and user, has realized this hair
Bright purpose.
The features of the present invention sees the detailed description of the drawings of the present case and following preferable embodiment and obtains clearly
Solution.
Detailed description of the invention
Fig. 1 is that the structure of staggered connection method outside large capacity split-phase type Three-Phase Transformer balance winding of the invention is shown
It is intended to.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Conjunction is specifically illustrating, and the present invention is further explained.
Embodiment
As shown in Figure 1, staggered connection method outside large capacity split-phase type Three-Phase Transformer balance winding of the invention, it
Include the following steps:
1, it measures and determines large capacity split-phase type transformer balance winding three-phase connection bronze medal specification and quantity: section ruler
Very little: 125mm × 10mm, oxygen-free copper add up to 0.267 ton, it is desirable that 6 meters one, totally 6, quality meets GB/T 5585.1-2005
Standard.
2, it measures and determines that large capacity split-phase type transformer balance winding three-phase connects bronze medal bracket, supports insulative porcelain vase specification
Size and model: bracket is diameter 100mm hollow steel pipe, high 2450mm, the steel pipe two sides long * wide of welding steel=400*250mm；
Supporting insulator model be respectively as follows: ZSW40.5-GY, be highly 560mm and ZSW72.5/4, be highly 760mm.
3, it measures and determines that large capacity split-phase type transformer balance winding ontology supports insulative porcelain vase, support porcelain vase extend connector
Model and material: FBW-40.5/5000-4 producer product designation are as follows: TR1698, material are glass reinforced plastic；High * wide * thickness=200*
125mm*20、6*φ18。
4, measure determine large capacity split-phase type transformer balance winding external connection be flexible coupling, down conductor specification ruler
Very little and model: copper material uses oxygen-free copper stripe, and flexible-connection copper strip foil thickness 0.2mm, be flexible coupling total length: 500mm, wherein takes mouth
Size: long: 100mm, width 125mm, thickness 20mm；Overlap joint connecting hole two is located at overlap joint mouth center, aperture: φ 12mm；Overlap joint connects
Contacting surface requires silver-plated.Down conductor uses zinc-plated bronze medal, long * wide * thickness=2950mm*8mm*5mm.
5, auxiliary material specification, quantity used in determining: busbar heat-shrinkable T bush, 35kv 120mm*4,20 meters；Busbar joint
Box, 20, the straight type of 120*40*4,20,120*30*4L type, 20,120*30*4T type；Outdoor two rectangular bus bar fixed hardware fittings
(vertical-type), MWL-204,35；Zinc-plated hexagon-headed bolt (full thread), diameter: M14, length 80Mmm, 140 sets；Zinc-plated six
Angle head leads to bolt (full thread), diameter: M12, length 40Mmm, 140 sets；Turret head brass bolt, diameter: M12, length 70Mmm
100 sets.
6, copper bar bracket, supporting insulator and bronze medal outside fixed large capacity split-phase type transformer balance winding, branch are installed
Frame basis is fixed rear concreting with rivet and is reinforced, and supporting insulator pedestal is fixed with bracket support plate with bolt, bronze medal peace
It is fixed with fixed fitting with supporting insulator after dress thermal shrinkable sleeve.
7, installation large capacity split-phase type transformer balance winding ontology supporting insulator, insulator extend connector, are flexible coupling,
Supporting insulator must carry out pedestal sealing when installing, extend connector and be attached by being flexible coupling with external bronze medal, connected
Bus insulation connector box must be installed at rear all joints.
8, installation large capacity split-phase type transformer balances winding earth downlead, and down conductor uses zinc-plated bronze medal, connects
Ground downlead is necessarily mounted at transformer balance winding and is flexible coupling at the copper bar of outside, it is therefore an objective to can pass through the buffer portion electricity that is flexible coupling
Power reduces and supports porcelain vase stress to transformer body.
Staggered connection method outside large capacity split-phase type Three-Phase Transformer balance winding of the invention, installation large capacity point
Phase formula transformer balances winding external connection copper bar bracket, and the installation balance winding external connection copper bar insulating supporting on bracket
Porcelain vase should accomplish that distribution and uniform force, same level copper bar height are consistent, the dislocation of inlet-outlet line copper bar when installing support frame
Distance should meet the requirements；Winding external connection copper installation pyrocondensation insulating sheath is balanced to all large capacity split-phase type transformers,
Start installation balance winding inlet-outlet line copper bar after the installation is completed, inlet-outlet line copper bar must use fixture fixation；Large capacity is installed
Split-phase type transformer balances winding ontology insulating supporting porcelain vase compensating joint；It is exhausted that large capacity split-phase type transformer balances winding ontology
Edge supports porcelain vase compensating joint to dock with external inlet-outlet line copper bar；Under installation large capacity split-phase type transformer balance winding earth draws
Line, can only be one point earth in three-phase equilibrium winding link circuit, and grounding point must be arranged at B phase, and the connection with balance winding
Point, which must be chosen to be at, to be flexible coupling at external copper bar；It can not pyrocondensation peace to large capacity split-phase type transformer balance winding link circuit
The joint area for filling insulating sheath installs detachable insulating sheath；Installation terminates, and test large capacity balances winding insulation resistance
Value is qualified, test DC resistance is qualified, transformer safety measure is removed after being completed, Switching impulse is sent after transformer demagnetization
Electricity.
Staggered connection method outside large capacity split-phase type Three-Phase Transformer balance winding of the invention, transformer is balanced
The winding parallel mode of connection, which is changed to the dislocation type mode of connection, can reduce disengaging copper bar by magnetic field repulses power；Change the mounting portion that is flexible coupling
Position is to reduce transformer body in order to effectively weaken external bronze medal tractive force by the buffering that is flexible coupling and support porcelain vase stress；It will
Down conductor connecting portion, which moves to, to be flexible coupling at external copper bar, reduces ground connection bronze medal to transformer body support porcelain vase traction
Power.
Staggered connection method outside large capacity split-phase type Three-Phase Transformer balance winding of the invention, by large capacity split-phase
After block form wiring is changed to the dislocation type mode of connection outside formula transformer balance winding, the change of large capacity split-phase type is effectively weakened
Depressor combined floodgate power transmission moment significant magnetic field power supports porcelain vase draw to balance winding ontology, has reached protection porcelain vase, has guaranteed
The purpose of transformer safety operation.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention, the claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (7)
1. staggered connection method outside a kind of large capacity split-phase type Three-Phase Transformer balance winding, which is characterized in that its feature
It is, it includes the following steps:
(1) size and number for determining large capacity split-phase type transformer balance winding three-phase connection bronze medal are measured；
(2) size for determining large capacity split-phase type transformer balance winding three-phase connection bronze medal bracket, supports insulative porcelain vase is measured；
(3) it measures and determines that large capacity split-phase type transformer balance winding ontology supports insulative porcelain vase, support porcelain vase extend connector；
(4) measure determine large capacity split-phase type transformer balance winding external connection be flexible coupling, the size of down conductor；
(5) determine that the size and number of auxiliary material used, auxiliary material include busbar heat-shrinkable T bush, busbar joint box, outdoor two rectangles
Bus bar fixing hardware (vertical-type), zinc-plated hexagon-headed bolt (full thread), zinc-plated turret head lead to bolt (full thread) and turret head
Brass bolt.
(6) copper bar bracket, supporting insulator and bronze medal outside fixed large capacity split-phase type transformer balance winding, bracket base are installed
Plinth is fixed rear concreting with rivet and is reinforced, and supporting insulator pedestal is fixed with bracket support plate with bolt, bronze medal installation heat
It is fixed with fixed fitting with supporting insulator after contracting set；
(7) installation large capacity split-phase type transformer balance winding ontology supporting insulator, insulator extend connector, are flexible coupling, and prop up
Pedestal sealing must be carried out when support insulator installation, extends connector and is attached by being flexible coupling with external bronze medal, connection is completed
All joints must install bus insulation connector box afterwards；
(8) installation large capacity split-phase type transformer balances winding earth downlead, and down conductor uses zinc-plated bronze medal, grounding lead
The offline transformer balance winding that is necessarily mounted at is flexible coupling at the copper bar of outside.
2. staggered connection method outside large capacity split-phase type Three-Phase Transformer balance winding as described in claim 1, special
Sign is, calculates excitation surge current size according to large capacity form-separating transformer, selection balances winding copper bar width, thickness and and connects
Quantity；Copper bar quantity needed for being determined according to large capacity split-phase type transformer floor plan and ontology insulating supporting porcelain vase absolute altitude.
3. staggered connection method outside large capacity split-phase type Three-Phase Transformer balance winding as described in claim 1, special
Sign is, determines and further determines that balance winding inlet-outlet line connecting copper bar specifically misplaces size after copper bar width, balance winding into
Outlet connecting copper bar must all misplace, and there are 1-2cm clearance distances.
4. staggered connection method outside large capacity split-phase type Three-Phase Transformer balance winding as described in claim 1, special
Sign is that it is flat to balance winding ontology insulating supporting porcelain vase absolute altitude, center line, transformer foundation according to large capacity split-phase type transformer
Face absolute altitude, balance winding inlet-outlet line copper bar width and dislocation height determine that inlet-outlet line (copper bar) supports outside transformer balance winding
Frame height, external inlet-outlet line (copper bar) insulating supporting porcelain vase height.
5. staggered connection method outside large capacity split-phase type Three-Phase Transformer balance winding as described in claim 1, special
Sign is, balances winding ontology insulating supporting porcelain vase height, balance winding inlet-outlet line copper bar according to large capacity split-phase type transformer
Width and dislocation height determine balance winding ontology insulating supporting porcelain vase connector connector compensation height.
6. staggered connection method outside large capacity split-phase type Three-Phase Transformer balance winding as described in claim 1, special
Sign is, balances winding ontology insulating supporting porcelain vase at a distance from nearest balance winding support according to large capacity split-phase type transformer
Determine the size that is flexible coupling；Down conductor height is determined every nearest earthing pole height according to balance winding copper bar and transformer bay.
7. staggered connection method outside large capacity split-phase type Three-Phase Transformer balance winding as described in claim 1, special
Sign is, according to measure size above production balance winding inlet-outlet line copper bar bracket, transformer balance winding external support porcelain vase,
It is flexible coupling and balances winding ontology insulating supporting porcelain vase compensating joint with transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810827242.6A CN108988365B (en) | 2018-07-25 | 2018-07-25 | External staggered connection method for three-phase balanced winding of high-capacity split-phase transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810827242.6A CN108988365B (en) | 2018-07-25 | 2018-07-25 | External staggered connection method for three-phase balanced winding of high-capacity split-phase transformer |
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| Publication Number | Publication Date |
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| CN108988365A true CN108988365A (en) | 2018-12-11 |
| CN108988365B CN108988365B (en) | 2022-07-08 |
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| CN108988365B (en) | 2022-07-08 |
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