CN108735464A - oil-immersed power transformer - Google Patents
oil-immersed power transformer Download PDFInfo
- Publication number
- CN108735464A CN108735464A CN201710274386.9A CN201710274386A CN108735464A CN 108735464 A CN108735464 A CN 108735464A CN 201710274386 A CN201710274386 A CN 201710274386A CN 108735464 A CN108735464 A CN 108735464A
- Authority
- CN
- China
- Prior art keywords
- winding
- oil
- power transformer
- low pressure
- immersed power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2847—Sheets; Strips
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2876—Cooling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/323—Insulation between winding turns, between winding layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
- H01F27/325—Coil bobbins
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2847—Sheets; Strips
- H01F2027/2857—Coil formed from wound foil conductor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
The invention discloses a kind of oil-immersed power transformer, its iron core has the cross section of approximate " D " shape；Its low pressure winding includes aluminium foil and layer insulation paper, the aluminium foil and layer insulation paper is alternate is wound into laminated fuel tubular, and fagging is equipped between the iron core and low pressure winding.Disclosed winding can enhance the anti-short circuit capability of power transformer, improve coiling quality and efficiency, reduce production cost, on the other hand, aluminium foil is applied to the winding of oil-immersed power transformer, the bauxite resource that China can be made full use of abundant, to keeping lasting, the sound development of China's transformer industry, it may have significance.
Description
Technical field
The present invention relates to power transformer technical field more particularly to a kind of oil-immersed power transformers.
Background technology
S series oil-immersed power transformer is mostly oval winding at present, and winding soaks in the oil, oil as dielectric and
Cooling media, the type of cooling are self cooling.Compared with dry-type transformer, although its temperature resistant grade is low, fire protecting performance is poor, is not easy to remove
Fortune, still, capacity is big, and load is big, and reliable and stable, price is low, so still having obtained widely applying.
The winding generally use copper wire of S series oil-immersed power transformers is coiled into oval cylinder structure, and iron core is using close
Like the section of ellipse, low pressure winding and high-voltage winding coiling are integrally directly sleeved in iron core column, to form oil immersed type
The nuclear structure of power transformer.
With being continuously increased for net capacity, power transformer anti-short circuit capability is at an outstanding problem.Due to coil
The presence of middle leakage magnetic flux, current carrying conductor under heavy current effect by very big electrodynamic impact, it is especially short suddenly in coil
Electric power is maximum when road, several ten times larger when than normal operation, even more, and thus caused axial force and diametral force can be to becoming
Depressor causes serious destruction.If can be caused when winding ampere-turn imbalance winding anti-short circuit capability reduction, and the structure of winding and
Shape is to influence the unbalanced major reason of ampere-turn, and one side copper wire winding has helical angle, and on the other hand, winding is mounted on iron
After core, iron core can also have an impact the shape of winding the imbalance of winding support force.Above-mentioned reason, greatly reduces oil immersion
The anti-short circuit capability of formula power transformer.
In addition, the Vehicles Collected from Market prices of raw materials go up, copper material is more expensive, and product cost is caused to increase, and increases to enterprise
Prodigious difficulty.And China's copper resource lacks, if excessively relying on copper material, certainly will influence the health hair of China's transformer industry
Exhibition.
Invention content
The technical problem to be solved by the present invention is to：A kind of oil-immersed power transformer is provided, to improve the anti-of transformer
Short-circuit capacity, and effectively reduce production cost.
In order to solve the above technical problems, the technical scheme is that：Oil-immersed power transformer, including iron core, are arranged
Winding on the iron core, the winding include coaxial mounted low pressure winding and high-voltage winding, and the low pressure winding is located at
The inside of the high-voltage winding, the low pressure winding include aluminium foil and layer insulation paper, and the aluminium foil and layer insulation paper are alternate
It is wound into laminated fuel tubular, further includes the fagging being set between the iron core and low pressure winding.
Wherein, the low pressure winding include two electrodes, described two electrodes respectively with the head end portion of the aluminium foil and
Terminal part connects, and an electrode is located at the inside of the cylinder, and an electrode is located at the outside of the cylinder；The iron core tool
There is the cross section of approximate " D " shape.
Wherein, the fagging is arranged in pairs, the axisymmetrical per a pair of of fagging relative to the winding.
Wherein, the fagging extends along the short transverse of winding.
Wherein, it is equipped with oil channel structure in the interlayer of the low pressure winding.
Wherein, the oil channel structure includes the stay connection being arranged in the interlayer of the low pressure winding, is set on the stay connection
The stay for having multiple circumferencial directions along aluminium foil uniformly distributed has the gap for leading to oil between adjacent two stays.
After using above-mentioned technical proposal, the beneficial effects of the invention are as follows：Since low pressure winding is by aluminium foil and layer insulation
Paper is alternate to be wound into laminated fuel tubular structure, thus it has helical angle unlike copper wire winding, and on entire cross section,
Fagging all points to the center of circle to the support force of winding, is advantageously implemented resultant force and balances, reduces the influence to winding shape.The present invention
It is unfavorable for the factor of ampere-turn equilibrium by eliminating, substantially increases the anti-short circuit capability of power transformer.On the other hand, China's aluminium
Resourceful, aluminium foil is applied to the winding of oil-immersed power transformer by the present invention, can not only improve coiling quality, improve around
Efficiency processed reduces production cost, and lasting, sound development to keeping China's transformer industry, it may have significance.
Due to the low pressure winding include two electrodes, described two electrodes respectively with the head end portion of the aluminium foil and end
End connects, and an electrode is located at the inside of the cylinder, and an electrode is located at the outside of the cylinder；The iron core has
The cross section of approximate " D " shape, after winding is installed on iron core, be located at electrode inside low pressure winding just with " D " of iron core
The barbed portion of the cross section of shape is adapted, thus it is easily installed, and it is equal in stress can to give full play to cylindric low pressure winding
The advantage of even aspect.
Due to the interlayer in the cylinder be equipped with oil channel structure, thus can by way of recycle oil from interlayer to winding
It is cooled down, substantially increases cooling effect.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the structural schematic diagram of the embodiment of the present invention；
Fig. 2 is the vertical view of Fig. 1.
Specific implementation mode
As Fig. 1 and Fig. 2 jointly shown in, a kind of oil-immersed power transformer only indicates in figure for brevity
100 part of iron core 200 and low pressure winding.In fact, the transformer further includes high-voltage winding, high-voltage winding and low pressure winding 100
It is coaxially disposed and is sheathed on iron core 200, low pressure winding 100 is located inside, and high-voltage winding is located at outside.
Low pressure winding 100 includes being wound into that laminated fuel tubular, two for drawing wiring with aluminium foil and layer insulation paper are alternate
Electrode 104 and two overhang insulation circles 101.It is equipped with oil channel structure in the interlayer of the cylinder, there are one the oil channel structures,
It is preferentially set at the 1/2 of the number of turns of the cylinder.After being passed through recycle oil into oil channel structure, winding can be carried out from interlayer
Cooling, for this purpose, oil channel structure is not limited to one.The present invention discloses a specific oil channel structure in detail, it
Including the stay connection in the interlayer of the cylinder 100 is arranged, it is uniformly distributed that the stay connection is equipped with multiple circumferencial directions along aluminium foil
Stay 102, there is between adjacent two stays 102 gap for leading to oil.
Two overhang insulation circles 101 are respectively by two band-like overhang insulation paper rolls around into and being set to the aluminium foil
Width direction two ends on, overhang insulation paper is together with layer insulation paper for insulating to aluminium foil.
Two electrodes 104 are respectively welded on two ends of first and last of the low pressure winding aluminium foil, and one is located at cylinder 100
Interior, one is located at outside cylinder 100, and the cross section of the electrode 104 is rectangle, preferably uses copper material.
High-voltage winding is then wound by copper wire, can also be aluminum steel in some cases certainly.
Iron core 200 has the cross section of approximate " D " shape, as shown in Figure 2, it is generally the case that iron core is superimposed by silicon steel sheet
Made of, from cross section, outer profile is jagged forever, for ease of description, is regarded as a circle (in figure
Two-dot chain line part) notch is clipped, here it is the meanings of approximate " D " shape.After winding is installed on iron core 200, it is located at
That electrode 104 inside low pressure winding is just adapted with the barbed portion of the cross section of " D " shape of iron core.
It is noted that being equipped with fagging 300, height of the fagging 300 along winding between iron core 200 and low pressure winding 100
Direction extends, and in order to make fagging 300 more balance the support force of winding, fagging 300 is arranged in pairs, and every a pair of of support
Axisymmetrical of the plate 300 relative to the winding.In this way, on entire cross section, fagging all points to justify to the support force of winding
The heart is advantageously implemented resultant force and balances, reduces the influence to winding shape.
Disclosed low pressure winding is manufactured using foil winding equipment.
An electrode 104 is welded on the head end of aluminium foil first, is then fixed on a paper web 103, certainly,
The paper web 103 is also required to use corresponding insulating materials.
Layer insulation paper is positioned on aluminium foil and is aligned, overhang insulation paper is posted by aluminium foil width direction (winding
At after cylinder be short transverse) two ends on.
Start coiling.
When around to 1/2 the number of turns, stay connection is added, the length of stay connection just can guarantee around a circle, continue coiling.
When around to defined the number of turns, another electrode 104 is welded on the terminal part of aluminium foil.So far, aluminium foil, interlayer are exhausted
Edge paper, overhang insulation paper and stay connection are just wound into an entirety.
Then further around high-voltage winding.
Disclosed oil-immersed power transformer can enhance the anti-short circuit capability of power transformer, improve coiling
Quality and efficiency reduce production cost.On the other hand, aluminium foil is applied to the winding of oil-immersed power transformer, it can be abundant
Using the bauxite resource that China is abundant, to keeping lasting, the sound development of China's transformer industry, it may have significance.
Claims (7)
1. oil-immersed power transformer, including
Iron core,
The winding being sheathed on the iron core, the winding include coaxial mounted low pressure winding and high-voltage winding, the low pressure
Winding is located at the inside of the high-voltage winding, it is characterised in that：
The low pressure winding includes
Aluminium foil and layer insulation paper, the aluminium foil and layer insulation paper is alternate is wound into laminated fuel tubular；
Further include
The fagging being set between the iron core and low pressure winding.
2. oil-immersed power transformer as described in claim 1, it is characterised in that：
The low pressure winding includes
Two electrodes, described two electrodes are connect with the head end portion of the aluminium foil and terminal part respectively, and an electrode is located at institute
The inside of cylinder is stated, an electrode is located at the outside of the cylinder；
The iron core has the cross section of approximate " D " shape.
3. oil-immersed power transformer as claimed in claim 2, it is characterised in that：The fagging is arranged in pairs, and described is every
Axisymmetrical of a pair of of fagging relative to the winding.
4. oil-immersed power transformer as claimed in claim 3, it is characterised in that：The fagging prolongs along the short transverse of winding
It stretches.
5. oil-immersed power transformer as claimed in claim 4, it is characterised in that：It is equipped with oil in the interlayer of the low pressure winding
Road structure.
6. oil-immersed power transformer as claimed in claim 5, it is characterised in that：The oil channel structure includes being arranged described
The stay of the interlayer of low pressure winding joins, and the stay connection is equipped with the uniformly distributed stay of multiple circumferencial directions along aluminium foil, adjacent
There is the gap for leading to oil between two stays.
7. oil-immersed power transformer as claimed in claim 6, it is characterised in that：There are one the oil channel structures, is set to
At the 1/2 of the number of turns of the cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710274386.9A CN108735464A (en) | 2017-04-17 | 2017-04-17 | oil-immersed power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710274386.9A CN108735464A (en) | 2017-04-17 | 2017-04-17 | oil-immersed power transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108735464A true CN108735464A (en) | 2018-11-02 |
Family
ID=63934225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710274386.9A Pending CN108735464A (en) | 2017-04-17 | 2017-04-17 | oil-immersed power transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108735464A (en) |
-
2017
- 2017-04-17 CN CN201710274386.9A patent/CN108735464A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181102 |
|
| WD01 | Invention patent application deemed withdrawn after publication |