CN101499372A - Low-voltage winding of oil immersion type power transformer - Google Patents
Low-voltage winding of oil immersion type power transformer Download PDFInfo
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- CN101499372A CN101499372A CNA2008101582803A CN200810158280A CN101499372A CN 101499372 A CN101499372 A CN 101499372A CN A2008101582803 A CNA2008101582803 A CN A2008101582803A CN 200810158280 A CN200810158280 A CN 200810158280A CN 101499372 A CN101499372 A CN 101499372A
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- oil
- power transformer
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- low pressure
- aluminium foil
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Abstract
The invention discloses an oil-immersed type power transformer winding which comprises aluminum foil and interlaminar insulation paper; and the aluminum foil and the interlaminar insulation paper are alternatively winded to form a multi-layer cylinder. The winding can enhance the short circuit resistance capacity of the power transformer, improve the winding quality and efficiency, and lower the production cost. On one hand, by applying the aluminum foil to the winding of the oil-immersed type power transformer, rich aluminum resources of China can be fully used, on the other hand, great significance is provided for maintaining sustainable and healthy development of the transformer industry of China.
Description
Technical field
The present invention relates to the oil-immersed power transformer technical field, relate in particular to the low pressure winding that oil-immersed power transformer is used.
Background technology
S series oil-immersed power transformer mostly is oval winding at present, and winding is immersed in the oil, and oil is as dielectric and cooling media, and the type of cooling is self cooling.Compare with dry-type transformer, though its temperature resistant grade is low, fire protecting performance is poor, is difficult for carrying,, its capacity is big, and load is big, and is reliable and stable, and price is low, so still obtained using widely.
The winding of S series oil-immersed power transformer adopts copper cash coiled oval cylinder structure usually, and iron core adopts the cross section of approximate ellipsoidal, low pressure winding and high pressure winding technique are integral directly and are sleeved on the iron core column, thereby form the core texture of oil-immersed power transformer.
Along with the continuous increase of net capacity, the power transformer anti-short circuit capability has become an outstanding problem.Because the existence of leakage flux in the coil, current carrying conductor is subjected to very big electrodynamic impact under the heavy current effect, electric power maximum when the coil suddenly-applied short circuit particularly, big tens times during than normal operation, even more, axial force that causes thus and diametral force can cause serious destruction to transformer.If the winding ampere-turn can cause the winding anti-short circuit capability to reduce when uneven, and the structure of winding and shape are to influence the unbalanced major reason of ampere-turn, the copper cash winding has helical angle on the one hand, on the other hand, after winding was installed in iron core, iron core also can exert an influence to the shape of winding to the imbalance of winding support force.Above-mentioned reason greatly reduces the anti-short circuit capability of oil-immersed power transformer.
In addition, the current market prices of raw and semifnished materials go up, and copper material is more expensive, cause product cost to increase, and have increased very big difficulty to enterprise.And China's copper resource shortage if too rely on copper material, certainly will influence the sound development of China's transformer industry.
Summary of the invention
Technical problem to be solved by this invention is: a kind of oil-immersed power transformer low pressure winding is provided, with the anti-short circuit capability of raising transformer, and effectively reduces production costs.
For solving the problems of the technologies described above, technical scheme of the present invention is: oil-immersed power transformer low pressure winding, described low pressure winding comprises aluminium foil and layer insulation paper, described aluminium foil and layer insulation paper roll coiled stratiform cylinder.
Wherein, the interlayer at described cylinder is provided with oil channel structure.
Wherein, described oil channel structure comprises the stay connection of the interlayer that is arranged on described cylinder, and described stay connection is provided with the slit that has logical oil between two a plurality of along the uniform stay of the circumferencial direction of aluminium foil, adjacent stays.
After having adopted technique scheme, the invention has the beneficial effects as follows: because the low pressure winding is by the alternate multi-layer cylinder structure that is wound into layer insulation paper of aluminium foil, thereby it has helical angle unlike the copper cash winding, and after winding is installed on the iron core, on entire cross section, fagging all points to the center of circle to the support force of winding, helps realizing the balance of making a concerted effort, and has reduced the influence to the winding shape.The present invention is unfavorable for the factor of ampere-turn equilibrium by elimination, has improved the anti-short circuit capability of power transformer greatly.On the other hand, China's bauxite resource is abundant, and the present invention is applied to aluminium foil the winding of oil-immersed power transformer, not only can improve the coiling quality, improve coiling efficient, reduce production costs, and to keeping continuing, developing in a healthy way of China's transformer industry, also significant.
Because the interlayer at described cylinder is provided with oil channel structure, thereby can cool off winding from interlayer by the mode of recycle oil, has improved cooling effect greatly.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the structural representation of the embodiment of the invention;
Fig. 2 is the vertical view of Fig. 1.
Embodiment
Shown in Fig. 1 and Fig. 2 are common, a kind of oil-immersed power transformer low pressure winding, with the alternate stratiform cylinder 100 that is wound into layer insulation paper of aluminium foil, high pressure winding (not shown) is formed by the copper cash coiling, and is arranged on the outside of low pressure winding with one heart.Interlayer at described cylinder is provided with oil channel structure, and described oil channel structure has one, preferentially is arranged at 1/2 place of the number of turn of described cylinder.Feed recycle oil in oil channel structure after, can cool off winding from interlayer, for this kind purpose, oil channel structure is not limited to one.The present invention has disclosed a concrete oil channel structure in detail, it comprises the stay connection of the interlayer that is arranged on described cylinder 100, described stay connection is provided with a plurality of along the uniform stay 102 of the circumferencial direction of aluminium foil, has the slit of logical oil between two adjacent stays 102.
In addition, two overhang insulation circles 101 respectively by the overhang insulation paper roll of two band shapes around forming, and be arranged on two ends of Width of described aluminium foil, overhang insulation paper and layer insulation paper one are used from aluminium foil are insulated.
Two of this winding draw the electrode 104 that wiring uses and are welded in respectively on two ends of first and last of described low pressure winding aluminium foil, and one is positioned at 100, one of cylinders and is positioned at outside the cylinder 100, and the cross section of described electrode 104 is a rectangle, preferably uses copper material.
This low pressure winding adopts the foil winding equipment manufacturing.
At first an electrode 104 is welded on the head end of aluminium foil, is fixed in subsequently on the paper web 103, certainly, this paper web 103 also needs to adopt the corresponding insulation material.
Be positioned on the aluminium foil layer insulation paper and alignment, overhang insulation paper be posted by on two ends of aluminium foil Width (being short transverse after being wound into tube).
The beginning coiling.
When around the time to 1/2 number of turn, add the stay connection, the length of stay connection can just guarantee around a circle, continues coiling.
When around to the regulation the number of turn time, on the terminal part of aluminium foil the welding another electrode 104.So far, aluminium foil, layer insulation paper, overhang insulation paper and stay connection just are wound into an integral body.
And then around the high pressure winding.
Disclosed winding can strengthen the anti-short circuit capability of power transformer, improves coiling quality and efficient, reduces production costs.On the other hand, aluminium foil is applied to the winding of oil-immersed power transformer, can makes full use of the bauxite resource of China's abundant, to keeping continuing, developing in a healthy way of China's transformer industry, also significant.
Claims (4)
1. oil-immersed power transformer low pressure winding, it is characterized in that: described low pressure winding comprises aluminium foil and layer insulation paper, the alternate stratiform cylinder that is wound into layer insulation paper of described aluminium foil.
2. oil-immersed power transformer low pressure winding as claimed in claim 1, it is characterized in that: the interlayer at described cylinder is provided with oil channel structure.
3. oil-immersed power transformer low pressure winding as claimed in claim 2, it is characterized in that: described oil channel structure comprises
Be arranged on the stay connection of the interlayer of described cylinder, described stay connection is provided with the slit that has logical oil between two a plurality of along the uniform stay of the circumferencial direction of aluminium foil, adjacent stays.
4. oil-immersed power transformer low pressure winding as claimed in claim 3, it is characterized in that: described oil channel structure has one, is arranged at 1/2 place of the number of turn of described cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101582803A CN101499372A (en) | 2008-10-28 | 2008-10-28 | Low-voltage winding of oil immersion type power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101582803A CN101499372A (en) | 2008-10-28 | 2008-10-28 | Low-voltage winding of oil immersion type power transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101499372A true CN101499372A (en) | 2009-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101582803A Pending CN101499372A (en) | 2008-10-28 | 2008-10-28 | Low-voltage winding of oil immersion type power transformer |
Country Status (1)
| Country | Link |
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| CN (1) | CN101499372A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269266A (en) * | 2014-07-09 | 2015-01-07 | 伊戈尔电气股份有限公司 | Oil-immersed type transformer non-end-insulation low-voltage foil-winding coil manufacturing technology |
| CN108987054A (en) * | 2018-07-18 | 2018-12-11 | 江苏恒屹变压器有限公司 | A kind of oil-immersed power transformer |
| CN115424834A (en) * | 2022-11-04 | 2022-12-02 | 成都双星变压器有限公司 | Transformer low-voltage winding structure and winding equipment thereof |
-
2008
- 2008-10-28 CN CNA2008101582803A patent/CN101499372A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269266A (en) * | 2014-07-09 | 2015-01-07 | 伊戈尔电气股份有限公司 | Oil-immersed type transformer non-end-insulation low-voltage foil-winding coil manufacturing technology |
| CN108987054A (en) * | 2018-07-18 | 2018-12-11 | 江苏恒屹变压器有限公司 | A kind of oil-immersed power transformer |
| CN115424834A (en) * | 2022-11-04 | 2022-12-02 | 成都双星变压器有限公司 | Transformer low-voltage winding structure and winding equipment thereof |
| CN115424834B (en) * | 2022-11-04 | 2023-03-14 | 成都双星变压器有限公司 | Transformer low-voltage winding structure and winding equipment thereof |
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Open date: 20090805 |