CN209561159U - A kind of oil-immersed transformer - Google Patents

A kind of oil-immersed transformer Download PDF

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Publication number
CN209561159U
CN209561159U CN201920374422.3U CN201920374422U CN209561159U CN 209561159 U CN209561159 U CN 209561159U CN 201920374422 U CN201920374422 U CN 201920374422U CN 209561159 U CN209561159 U CN 209561159U
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China
Prior art keywords
coil
winding
oil
windings
tension coil
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Active
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CN201920374422.3U
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Chinese (zh)
Inventor
张海峰
刘书霞
唐广耀
孙银龙
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Henan Senyuan Electric Co Ltd
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Henan Senyuan Electric Co Ltd
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Abstract

The utility model relates to a kind of oil-immersed transformers, including iron core and the low-voltage coil and high-tension coil that are wound around on iron core, it is successively iron core, low-voltage coil, high-tension coil from inside to outside, high-tension coil includes coil winding and lower coil winding, intermediate ends insulating layer is set between adjacent windings winding, oil duct is provided in coil windings, the coil winding of high-tension coil is at least divided into two sub- coil windings, the lower coil winding of high-tension coil is at least divided into two sub- coil windings, setting up and down and series connection between adjacent subcoil winding.Its high-tension coil uses layered structure, by increasing the number of segment of coil windings, reduces the number of turns of every layer line circle accordingly, and then voltage between layers is caused to reduce, the thickness of interlayer insulating film also accordingly reduces, and the structure of this high-tension coil is conducive to oil pipe and radiates, and improves the safety of transformer.

Description

A kind of oil-immersed transformer
Technical field
The utility model belongs to power transmission and distribution equipment technical field, and in particular to a kind of oil-immersed transformer.
Background technique
Transformer is the most important primary equipment of power supply link in power grid construction, and the master as Operation of Electric Systems sets Standby, whether transformer, which can safely and steadily run, seems most important, this depends greatly on transformer station high-voltage side bus mistake The stability of itself in journey.Therefore the optimization design of transformer coiling mode is a key.Yyn0 was once 35kV grades of oil immersed types The traditional connection of transformer, because this connection can cause to export electric current asymmetry in secondary side asymmetric load, from And generate primary side neutral point drift;So the existing connection for substantially mostly using Dyn11, but the high-tension coil of such connection around Line mode mostly uses layered structure, wherein in three phase mains the loop construction of a phase as shown in Figure 1, this structure is coil turn Number is evenly distributed to every layer, as shown in Fig. 2, 101 be wherein end insulation, 102 be interlayer insulating film for the structure of transformer, and 103 To support coil square ring, 104 be high pressure lower coil, and 107 be high pressure upper coil, and 108 be low pressure winding.A is three phase mains A phase of ABC, the phase that X is three phase mains XYZ, wherein X12, X13, X14, X15 are conducting wire line end, can be existed according to the actual situation Tap is set on coil.The voltage of its coil between layers is larger, to guarantee transformer safety, need to place multilayer layer insulation Layer increases the thickness of interlayer insulating film, causes the radial size of coil to increase, is unfavorable for the heat spreading function of oil duct, also makes cost Increase.
Utility model content
The purpose of this utility model is to provide a kind of oil-immersed transformers, for solving existing high-tension coil winding mode Caused by the excessive problem for causing transformer safety performance unstable of coil interlayer voltage.
In order to solve the above technical problems, the technical solution of the utility model are as follows:
The utility model provides a kind of oil-immersed transformer, including iron core and the low-voltage coil and height that are wound around on iron core Crimping circle, is successively iron core, low-voltage coil, high-tension coil from inside to outside, and the high-tension coil includes coil winding and offline Winding is enclosed, intermediate ends insulating layer is set between the adjacent coil windings, is provided with oil duct, the high pressure in the coil windings The coil winding of coil is at least divided into two sub- coil windings, and the lower coil winding of the high-tension coil is at least divided into two sons Coil windings, it is setting up and down between adjacent subcoil winding and be connected in series.
The utility model has the beneficial effects that
A kind of oil-immersed transformer provided by the utility model, high-tension coil use layered structure, by increasing coil The number of segment of winding reduces the number of turns of every layer line circle accordingly, and then voltage between layers is caused to reduce, the thickness of interlayer insulating film also phase It should reduce, the structure of this high-tension coil is conducive to oil pipe and radiates, and improves the safety of transformer.
Further, section insulation layer is set between the adjacent subcoil winding;Facilitate the security performance of transformer.
Further, interlayer insulating film is provided between the subcoil winding adjacent layer;Prevent layer short circuit.
Further, the intermediate ends insulating layer is square ring.It can be realized and be dielectrically separated from.
Further, the interlayer insulating film is cable paper.It can be realized layer insulation isolation.
Detailed description of the invention
Fig. 1 is layered structure high-tension coil schematic diagram;
Fig. 2 is the oil-immersed transformer structural schematic diagram using layered structure;
Fig. 3 is the utility model oil-immersed transformer high-voltage coils schematic diagram;
Fig. 4 is the utility model oil-immersed transformer structural schematic diagram;
Appended drawing reference are as follows: 2- interlayer insulating film, 3- section insulation layer, 4- oil duct, 5- intermediate ends insulating layer, the insulation of the end 6-, 9- low pressure winding, 11- the first subcoil winding, 12- the second subcoil winding, 13- third subcoil winding, the 4th sub-line of 14- Winding is enclosed, the end 101- is insulated, 102- interlayer insulating film, 103- support coil square ring, 104- high pressure lower coil, in 107- high pressure Portion's coil, 108- low pressure winding, a phase of A- three phase mains ABC, a phase of X- three phase mains XYZ, X2, X3, X4, X5, X6, X7, X12, X13, X14, X15 are conducting wire line end.
Specific embodiment
To keep the purpose of this utility model, technical solution and advantage clearer, with reference to the accompanying drawings and embodiments, to this Utility model is described in further detail.
The basic principle of the utility model are as follows:
By the number of segment of increase coil windings, reduce the number of turns of every layer line circle accordingly, and then voltage between layers is caused to reduce, The thickness of interlayer insulating film also accordingly reduces, and is conducive to oil pipe and radiates, and improves the safety of transformer.
Specific embodiment are as follows:
The high-tension coil of oil-immersed transformer is as shown in figure 3, high-tension coil is divided under high pressure coil winding and high pressure Coil windings are separated two coil windings by intermediate ends insulating layer, will be wherein each in order to increase the number of segment of coil windings Coil windings are divided into two sub- coil windings, and high pressure coil winding is divided into the first subcoil winding 11 and the second subcoil winding 12, high pressure lower coil winding is divided into third subcoil winding 13 and the 4th subcoil winding 14, the first subcoil winding 11 and The series connection of two subcoil windings 12;Third subcoil winding 13 and the series connection of the 4th subcoil winding 14.In figure, between every layer line circle Equipped with interlayer insulating film 2, section insulation layer 3 is equipped between each subcoil winding, is provided with oil duct 4 in coil windings, for for Transformer radiates, and is provided with intermediate ends insulating layer 5 between two coil windings.X2, X3, X4, X5, X6, X7 are wire in figure End, wherein X2, X3, X4, X5 are coil tap.
Specific transformer device structure is as shown in figure 4, include low pressure winding 9 and high-voltage winding, it is online that high-voltage winding is divided into high pressure Enclose winding and high pressure lower coil winding, on two coil windings are separated by intermediate ends insulating layer 5, high pressure coil winding is divided into the One subcoil winding 11 and the second subcoil winding 12, high pressure lower coil winding are divided into third subcoil winding 13 and the 4th sub-line Winding 14 is enclosed, the upper and lower ends of subcoil winding need to be dielectrically separated from, such as the second subcoil winding 12 passes through section insulation Layer 3 and intermediate ends insulating layer 5 are isolated.Every layer line circle of subcoil winding is isolated by interlayer insulating film 2, and oil duct 4 is used It radiates in for transformer, end insulation 6 enhances the security performance of transformer.X2, X3, X4, X5, X6, X7 are conducting wire line end in figure, Specifically, coil tap can be arranged according to actual needs.
Intermediate ends insulating layer 5 is coil support square ring in the present embodiment.
Interlayer insulating film 2 is cable paper in the present embodiment, and the number of cable paper is two.
The number of turns of every layer conductor of the present embodiment coil winding is unequal.As other embodiments, coil windings The number of turns of every layer conductor is set as equal.
Each coil windings are divided into two sub- coil windings in the present embodiment.As other embodiments, subcoil winding Number can be greater than two, setting up and down and series connection between adjacent subcoil winding.
It is discussed in detail although the content of the utility model has passed through above preferred embodiment, but it should be appreciated that on The description stated is not considered as limitations of the present invention.After those skilled in the art have read above content, for A variety of modifications and substitutions of the utility model all will be apparent.Therefore, the protection scope of the utility model should be by appended Claim limit.

Claims (5)

1. a kind of oil-immersed transformer, including iron core and the low-voltage coil and high-tension coil that are wound around on iron core, from inside to outside according to Secondary is iron core, low-voltage coil, high-tension coil, and the high-tension coil includes coil winding and lower coil winding, the adjacent line It encloses and intermediate ends insulating layer is set between winding, be provided with oil duct in the coil windings, which is characterized in that the high-tension coil Coil winding is at least divided into two sub- coil windings, the lower coil winding of the high-tension coil be at least divided into two subcoils around Group, it is setting up and down between adjacent subcoil winding and be connected in series.
2. a kind of oil-immersed transformer according to claim 1, which is characterized in that set between the adjacent subcoil winding Set section insulation layer.
3. a kind of oil-immersed transformer according to claim 1 or 2, which is characterized in that the subcoil winding adjacent layer Between be provided with interlayer insulating film.
4. a kind of oil-immersed transformer according to claim 3, which is characterized in that the intermediate ends insulating layer is square ring.
5. a kind of oil-immersed transformer according to claim 3, which is characterized in that the interlayer insulating film is cable paper.
CN201920374422.3U 2019-03-23 2019-03-23 A kind of oil-immersed transformer Active CN209561159U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920374422.3U CN209561159U (en) 2019-03-23 2019-03-23 A kind of oil-immersed transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920374422.3U CN209561159U (en) 2019-03-23 2019-03-23 A kind of oil-immersed transformer

Publications (1)

Publication Number Publication Date
CN209561159U true CN209561159U (en) 2019-10-29

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112951556A (en) * 2021-03-22 2021-06-11 保定天威保变电气股份有限公司 Novel high-capacity axial split transformer body structure and heat dissipation method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112951556A (en) * 2021-03-22 2021-06-11 保定天威保变电气股份有限公司 Novel high-capacity axial split transformer body structure and heat dissipation method

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