CN209418279U - A wide range of pressure regulation intermediate transformer - Google Patents
A wide range of pressure regulation intermediate transformer Download PDFInfo
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- CN209418279U CN209418279U CN201821997660.1U CN201821997660U CN209418279U CN 209418279 U CN209418279 U CN 209418279U CN 201821997660 U CN201821997660 U CN 201821997660U CN 209418279 U CN209418279 U CN 209418279U
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Abstract
The utility model discloses a kind of a wide range of pressure regulation intermediate transformers, including low pressure winding, high-voltage winding and tap-changing windings, high-voltage winding includes the level-one high-voltage winding of arranged in co-axial alignment, second level high-voltage winding, and at least five hard square rings being located between low pressure winding and high-voltage winding.A former high-voltage winding is divided into the classification high-voltage winding of two arranged in co-axial alignment by the utility model, partial discharge is reduced using the insulation system including hard square ring, small square ring and end circle, and two hard square rings are set close to the outlet end of iron yoke in classification high-voltage winding, partial discharge is further decreased, to obtain a wide range of pressure regulation intermediate transformer of 110kV or more for meeting partial discharge requirement.The utility model also meets creepage distance, solves the problems, such as that circulation problem when parallel connection and the potential difference between section, the high-voltage winding of classification are also convenient for lifting one's head in the middle part of high-tension coil, improves assembly efficiency.
Description
Technical field
The utility model relates to a kind of high-tension transformer, more particularly to it is a kind of can a wide range of pressure regulation intermediate transformer.
Background technique
Shelf depreciation refers to the electrical discharge that the partial component in apparatus insulated system is breakdown under high pressure and is formed, this
Kind electric discharge is likely to occur near electrode, it is also possible to be occurred in other positions.It is tested, can be determined wait test-manufacture by shelf depreciation
Whether product are exceeded with the presence or absence of electric discharge and electric discharge, and determine discharge voltage and extinction voltage, to find common Insulation Test institute
The local invisible defect that can not be detected.The transformer of 66kV voltage class or more is required to do induced over voltage withstand test at present
And partial discharge test, in order to meet the test voltage requirement of test item, while also guaranteeing that the Insulation Test of test item does not occur
Overvoltage phenomenon, it is necessary to which experiment station increases intermediate transformer.In order to adapt to each test item test when different tests voltage and
The requirement of electric current, generating set, which should can adjust, exports different voltage and currents, the structural adjustment that intermediate transformer passes through itself
Output voltage, to guarantee the suitable output voltage of test item.Higher output voltage range of regulation in order to obtain, intermediate transformer
It allows for sustaining the influence that big electric field carrys out local discharge band, it is therefore desirable to special insulating Design is carried out, to obtain
Partial discharge tests intermediate transformer product up to standard.
Summary of the invention
Goal of the invention: in view of the above problems, the utility model proposes a kind of a wide range of pressure regulation intermediate transformer, the transformer
The partial discharge requirement of transformer by shelf depreciation standard testing, can be met when the range of regulation upper limit reaches 110kV or more.
Technical solution: technical solution used by the utility model is a kind of a wide range of pressure regulation intermediate transformer, including low
Press winding, high-voltage winding and tap-changing windings, high-voltage winding includes the level-one high-voltage winding of arranged in co-axial alignment, second level high-voltage winding, with
And at least five hard square rings being located between low pressure winding and high-voltage winding, the outlet end of each classification high-voltage winding plug
There is hard square ring.The level-one high-voltage winding is equipped at least two hard square rings, including the first hard square ring close to the outlet end of iron yoke
With the second hard square ring, the second hard square ring is set in the outside of the first hard square ring.
Further, be additionally provided with multiple small square rings in each classification high-voltage winding, the tail end of level-one high-voltage winding and
The head end of second level high-voltage winding, which pads, is equipped with small square ring.
Further, the outer cover of the level-one high-voltage winding and second level high-voltage winding is equipped with end circle.The end is enclosed
Annular paper circle and the spaced cushion block on paper circle.
Further, the winding technique mode of the transformer includes continous way, laminar, spiral and multistage layering winding
Formula.
The utility model has the advantages that compared with prior art, one high-voltage winding of original is divided by the utility model in design of transformer
The classification high-voltage winding of two arranged in co-axial alignment includes hard square ring, small square ring and end by using to each classification high-voltage winding
A set of insulation system including circle reduces partial discharge, and in classification high-voltage winding outside the hard square ring of the outlet end of iron yoke
One hard square ring is set again, further decreases partial discharge, is met in a wide range of pressure regulation of 110kV or more of partial discharge requirement to obtain
Between transformer.In addition, the utility model also meets creepage distance, solve circulation problem when parallel connection and the potential difference between section
Problem, the high-voltage winding of classification are also convenient for lifting one's head in the middle part of high-tension coil, improve assembly efficiency.
Detailed description of the invention
Fig. 1 is the sectional schematic diagram of intermediate transformer described in the utility model；
Fig. 2 is coil structures schematic diagram in end described in the utility model；
Fig. 3 is the front view a and side view b of hard square ring described in the utility model；
Fig. 4 is the schematic diagram of hard one circle of square ring arrangement described in the utility model.
Specific embodiment
The technical solution of the utility model is further described with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of a wide range of pressure regulation intermediate transformer described in the utility model, including low pressure winding 1, high pressure
Winding 2 and tap-changing windings 3, the winding technique mode of the transformer include continous way, laminar, spiral and multistage layering winding
Formula.High-voltage winding 2 includes level-one high-voltage winding 201, the second level high-voltage winding 202 of arranged in co-axial alignment, and is located at 1 He of low pressure winding
Hard square ring between high-voltage winding 2.The hard square ring 6 of first hard square ring 4, third, the 4th hard square ring 7 and five stiffness square ring 8 this four
Hard square ring is plugged in four outlet ends of level-one high-voltage winding 201 and second level high-voltage winding 202, level-one high-voltage winding respectively
201 are additionally provided with the second hard square ring 5 close to the outlet end of iron yoke, and the second hard square ring 5 is set in the outside of the first hard square ring 4.Respectively
Multiple small square rings, the tail end of level-one high-voltage winding 201 and the head end of second level high-voltage winding 202 are additionally provided in a classification high-voltage winding
Pad is equipped with small square ring 10.Small square ring 10 is folded in half into certain angle from centre by the cardboard for being suppressed with small corrugation and is made, and cushioning is small
The purpose of square ring is the insulation thickness that part increases conducting wire, reduces the electric field strength at this in oil, and dielectric strength is improved very much, mentioned
For height along the discharge voltage on stay surface, discharge voltage can be improved 25%.Level-one high-voltage winding 201 and second level high-voltage winding 202
Outside be also arranged with end circle 9.
As shown in Fig. 2, the end circle 9 includes annular paper circle 901 and the spaced cushion block 902 on paper circle.End circle
It is the axial individually end insulation of high-voltage winding, to constitute horizontal oil duct, adjustment end insulation distance compares winding using paper circle outer diameter
To increase creepage distance, paper circle is additionally provided with to draw 903 part of opening of high-voltage winding lead-out wire the big structure of outer diameter.
The winding overhang of 110kV, the especially position of end outlet, need to install hard square ring.Hard square ring is by pulp molding
Into two arcwall faces with certain angle, dielectric strength is high.As shown in figure 3, for the front view a and side view b of hard square ring,
The shape of hard square ring such as " skirt ", two arcwall faces are a certain included angle.The shape of hard square ring should be with end power line equipotential surface base
This coincidence, i.e., vertical with the power line of electric field, to be effectively blocked the effect of electric field, hard square ring horizontal component is placed on winding terminal
Portion, excessive circular is bigger than winding outer diameter, and such insulating cylinder length can reduce, and strengthen the insulation of winding overhang, makes to insulate
Compact-sized, the marginal discharge of winding can also be prevented by placing the square ring.
Multiple hard square rings can be installed in the outlet end of high-voltage winding, between high-voltage winding and low pressure winding, form one
Circle is enclosed in the outside of the first high-voltage winding or the second high-voltage winding.The structure of the one hard square ring of circle of installing is as shown in Figure 4.
Claims (5)
1. a kind of a wide range of pressure regulation intermediate transformer, including low pressure winding (1), high-voltage winding (2) and tap-changing windings (3), special
Sign is: high-voltage winding (2) includes the level-one high-voltage winding (201) of arranged in co-axial alignment, second level high-voltage winding (202), and is located at
At least five hard square rings between low pressure winding (1) and high-voltage winding (2)；The outlet end of each classification high-voltage winding plugs
There is a hard square ring, the level-one high-voltage winding (201) is equipped at least two hard square rings close to the outlet end of core insulation, including the
One hard square ring (4) and the second hard square ring (5), the second hard square ring (5) are set in the outside of the first hard square ring (4).
2. a wide range of pressure regulation intermediate transformer according to claim 1, it is characterised in that: each classification high-voltage winding
In be additionally provided with multiple small square rings, the tail end of level-one high-voltage winding (201) and the head end of second level high-voltage winding (202) pad be equipped with it is small
Square ring (10).
3. a wide range of pressure regulation intermediate transformer according to claim 1, it is characterised in that: the level-one high-voltage winding
(201) and the outer cover of second level high-voltage winding (202) is equipped with end circle (9).
4. a wide range of pressure regulation intermediate transformer according to claim 3, it is characterised in that: the end circle (9) includes annular
Paper circle (901) and the spaced cushion block (902) on paper circle.
5. a wide range of pressure regulation intermediate transformer according to claim 1, it is characterised in that: the winding technique of the transformer
Mode includes continous way, laminar, spiral and multistage layering winding type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821997660.1U CN209418279U (en) | 2018-11-30 | 2018-11-30 | A wide range of pressure regulation intermediate transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821997660.1U CN209418279U (en) | 2018-11-30 | 2018-11-30 | A wide range of pressure regulation intermediate transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209418279U true CN209418279U (en) | 2019-09-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821997660.1U Active CN209418279U (en) | 2018-11-30 | 2018-11-30 | A wide range of pressure regulation intermediate transformer |
Country Status (1)
| Country | Link |
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| CN (1) | CN209418279U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109378195A (en) * | 2018-11-30 | 2019-02-22 | 中电电气(江苏)股份有限公司 | A wide range of pressure regulation intermediate transformer |
-
2018
- 2018-11-30 CN CN201821997660.1U patent/CN209418279U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109378195A (en) * | 2018-11-30 | 2019-02-22 | 中电电气(江苏)股份有限公司 | A wide range of pressure regulation intermediate transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200529 Address after: 212200, No. 188, CLP Road, Yangzhong, Jiangsu, Zhenjiang Patentee after: CLP (Jiangsu) transformer manufacturing Co.,Ltd. Address before: 212200, No. 188, CLP Road, Yangzhong, Jiangsu, Zhenjiang Patentee before: CEEG (JIANGSU) Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210917 Address after: 212200 Zhongdian Avenue, Yangzhong City, Zhenjiang City, Jiangsu Province Patentee after: CEEG (JIANGSU) Co.,Ltd. Address before: No. 188, Zhongdian Avenue, Yangzhong City, Zhenjiang City, Jiangsu Province, 212200 Patentee before: CLP (Jiangsu) transformer manufacturing Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220408 Address after: No. 188, Zhongdian Avenue, Yangzhong City, Zhenjiang City, Jiangsu Province, 212200 Patentee after: CLP (Jiangsu) transformer manufacturing Co.,Ltd. Address before: 212200 Zhongdian Avenue, Yangzhong City, Zhenjiang City, Jiangsu Province Patentee before: CEEG (JIANGSU) Co.,Ltd. |