CN203659596U - 35kV transformer coil structure - Google Patents
35kV transformer coil structure Download PDFInfo
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- CN203659596U CN203659596U CN201320842184.7U CN201320842184U CN203659596U CN 203659596 U CN203659596 U CN 203659596U CN 201320842184 U CN201320842184 U CN 201320842184U CN 203659596 U CN203659596 U CN 203659596U
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- 238000009413 insulation Methods 0.000 claims abstract description 10
- 238000004804 winding Methods 0.000 claims abstract description 7
- 230000011218 segmentation Effects 0.000 claims description 4
- 239000000123 paper Substances 0.000 claims description 3
- 230000004907 flux Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 17
- 239000011229 interlayer Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
The utility model relates to a 35kV transformer coil structure. The 35kV transformer coil structure comprises a low-voltage coil and a high-voltage coil which are in the form of long-round joint winding, wherein the high-voltage coil is of a long-round segmented multilayer cylindrical structure; the arrangement of turns per coil presents trapezoidal distribution from the inner layer to the outer layer; a longitudinal oil passage is arranged between the inner part of an upper segment of the coil and a lower segment of the coil; end coils and angle rings are placed at both ends of the coils and between coil segments; the segments are connected through tap switches; end insulations are arranged at the coil ends. The 35kV transformer coil structure has the advantages that the potential difference of starting and ending leads of the high-voltage coil to an outermost layer is small, the voltage between layers is low, the field intensity distribution inside the coils is good, the distribution of ampere-turns is balanced, the magnetic flux leakage is small, the mechanical strength is high, and the resistance to short circuits is enhanced.
Description
Technical field
The utility model relates to a kind of transformer coil, specifically a kind of 35kV transformer coil structure.
Background technology
At present, 35kV distribution transformer is widely used electricity market, require its product construction rationally, excellent performance, insulation safety be reliable.Tradition multi-layer cylinder formula coil, field strength distribution is inhomogeneous, and partial discharge quantity is large, reduces the dielectric strength of transformer oil; Voltage between layers is large, and layer insulation number is many, and coil width, to greatly, increases its manufacturing cost; Thereby coil inside lacks horizontal oil circuit causes transformer oil stream not smooth, and area of dissipation is little; Coil rise end a potential difference and voltage between layers higher, the high field skewness of coil inside, all reduces its Short Circuit withstand impact resistance.
Utility model content
Not little for distribution transformer coils outermost layer potential difference of the prior art, coil inside field strength distribution is poor, the weak points such as ampere-turn balance of distribution is poor, the technical problems to be solved in the utility model is to provide that a kind of outermost layer potential difference is little, coil inside field strength distribution better, the 35kV transformer coil structure of ampere-turn distributing equilibrium.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of 35kV transformer coil structure of the utility model, comprise low-voltage coil and high-tension coil, high-tension coil and low-voltage coil are oval closing around form, wherein high-tension coil is oval segmentation multi-layer cylinder formula structure, coil turn is arranged and is trapezoidal profile by internal layer to skin, and longitudinal oil duct is set between upper-lower section coil inside, places end circle and square ring between coil two ends and coil segment and section, between section and section, be connected by shunting switch, end winding arranges end insulation.
Described square ring is the integrated character cut in bas-relief structure of crimped paper, and both ends of the surface are arranged in the two ends of every section of high-tension coil, and both ends of the surface joint face is arranged between high-tension coil and low-voltage coil.
The width of described rear end insulation is widened and is reduced gradually gradually successively from internal layer to skin.
Described high-tension coil and low-voltage coil are that oval closing around form is: be equipped with stay and cardboard in low-voltage coil outside, the direct winding high-tension coil of stay and cardboard.
The utlity model has following beneficial effect and advantage:
1. to enclose end head lead-in wire little to outermost layer potential difference for the utility model high-voltage line, and voltage between layers is lower, and coil inside field strength distribution is better, ampere-turn distributing equilibrium, and leakage field is little, and mechanical strength is high, and anti-short circuit capability strengthens.
2. high-tension coil of the present utility model adopts drum type brake trapezoidal coil structure, retaining outside the advantage of traditional multi-layer cylinder formula coil, significantly reduce again coil interlayer voltage, the field strength distribution of coil inside is even, thereby reduction partial discharge quantity, ampere-turn distributing equilibrium, Short Circuit withstand impact resistance all strengthens.
Brief description of the drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is that the utility model mesohigh coil turn is trapezoidal arrangement schematic diagram.
Wherein: 1 is low-voltage coil, 2 is high-tension coil, and 3 is square ring, and 4 is end insulation, and 5 is end circle.
Embodiment
Below in conjunction with Figure of description, the present invention is further elaborated.
As shown in Figure 1, the utility model transformer coil structure comprises low-voltage coil 1 and high-tension coil 2, high-tension coil 2 and low-voltage coil 1 are oval closing around form, wherein high-tension coil 2 is oval segmentation multi-layer cylinder formula structure, the arrangement of the upper and lower section of coil interlayer number of turn is trapezoidal profile by internal layer to skin, upper and lower section of coil inside arranges longitudinal oil duct (as shown in Figure 2), between the section of high-tension coil and section, place end circle 5, upper and lower section of coil two ends are respectively equipped with square ring 3, between section and section, be connected by shunting switch, end winding arranges end insulation.
In the present embodiment, square ring 3 adopts 2 0.8 thick integrated character cut in bas-relief structures of three wooden crimped paper, both ends of the surface are arranged in the two ends of every section of high-tension coil, both ends of the surface joint face is arranged between high-tension coil and low-voltage coil, not only play the effect of square ring, and can replace the insulating board between high and low pressure coil, the number of turn of high-tension coil 2 is arranged and is trapezoidal profile (as shown in Figure 2) by internal layer to skin; The width of end insulation 4 is widened and is reduced gradually gradually successively from internal layer to skin, increases the creep distance of high-tension coil 2 to low-voltage coil 1, shortens the distance of high-tension coil 2 to iron yoke.The complete low-voltage coil 1 of coiling, is connected on after the outside paving stay of low-voltage coil 1 and cardboard, more directly around high-tension coil 2, after high-tension coil 2 segmentations, upper semisection and lower semisection be left around to, coiling is convenient, also can adopt different around to, as long as magnetic flux and winding protruding head are rationally distributed.
The utility model is except retaining the advantage of traditional multi-layer cylinder formula coil, significantly reduce again coil interlayer voltage, the field strength distribution of coil inside is even, thereby reduction partial discharge quantity, ampere-turn distributing equilibrium, Short Circuit withstand impact resistance all strengthens, and leakage field is little, mechanical strength is high, and anti-short circuit capability strengthens.Reduce partial discharge, increase the area of dissipation of coil.
Claims (4)
1. a 35kV transformer coil structure, comprise low-voltage coil and high-tension coil, it is characterized in that: high-tension coil and low-voltage coil are oval closing around form, wherein high-tension coil is oval segmentation multi-layer cylinder formula structure, coil turn is arranged and is trapezoidal profile by internal layer to skin, and longitudinal oil duct is set between upper-lower section coil inside, places end circle and square ring between coil two ends and coil segment and section, between section and section, be connected by shunting switch, end winding arranges end insulation.
2. by 35kV transformer coil structure claimed in claim 1, it is characterized in that: described square ring is the integrated character cut in bas-relief structure of crimped paper, and both ends of the surface are arranged in the two ends of every section of high-tension coil, and both ends of the surface joint face is arranged between high-tension coil and low-voltage coil.
3. by 35kV transformer coil structure claimed in claim 1, it is characterized in that: the width of described end insulation is widened and reduced gradually gradually successively from internal layer to skin.
4. by 35kV transformer coil structure claimed in claim 1, it is characterized in that: described high-tension coil and low-voltage coil are that oval closing around form is: be equipped with stay and cardboard in low-voltage coil outside, the direct winding high-tension coil of stay and cardboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320842184.7U CN203659596U (en) | 2013-12-17 | 2013-12-17 | 35kV transformer coil structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320842184.7U CN203659596U (en) | 2013-12-17 | 2013-12-17 | 35kV transformer coil structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203659596U true CN203659596U (en) | 2014-06-18 |
Family
ID=50925960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320842184.7U Expired - Lifetime CN203659596U (en) | 2013-12-17 | 2013-12-17 | 35kV transformer coil structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203659596U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104835635A (en) * | 2015-05-07 | 2015-08-12 | 江苏扬动电气有限公司 | Stepwise end insulator strengthening structure for high-voltage coil of transformer |
| CN108847331A (en) * | 2018-07-02 | 2018-11-20 | 河南森源电气股份有限公司 | A kind of transformer and coil block |
-
2013
- 2013-12-17 CN CN201320842184.7U patent/CN203659596U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104835635A (en) * | 2015-05-07 | 2015-08-12 | 江苏扬动电气有限公司 | Stepwise end insulator strengthening structure for high-voltage coil of transformer |
| CN108847331A (en) * | 2018-07-02 | 2018-11-20 | 河南森源电气股份有限公司 | A kind of transformer and coil block |
| CN108847331B (en) * | 2018-07-02 | 2024-01-19 | 河南森源电气股份有限公司 | Transformer and coil assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140618 |
|
| CX01 | Expiry of patent term |