CN108735476A - A kind of 10kV oil immersion-type distribution transformers of graded winding - Google Patents
A kind of 10kV oil immersion-type distribution transformers of graded winding Download PDFInfo
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- CN108735476A CN108735476A CN201810727963.XA CN201810727963A CN108735476A CN 108735476 A CN108735476 A CN 108735476A CN 201810727963 A CN201810727963 A CN 201810727963A CN 108735476 A CN108735476 A CN 108735476A
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- coil
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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
- H01F27/28—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
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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
-
- 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
- H01F27/2823—Wires
-
- 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
- H01F27/322—Insulating of coils, windings, or parts thereof the insulation forming channels for circulation of the fluid
-
- 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
Abstract
The invention discloses a kind of 10kV oil immersion-type distribution transformers of graded winding, including iron core folder, iron core, and graded winding winding, iron core and coil windings there are gap and are arranged oil duct insulation, all there is gap between each sectional coil and section insulation is arranged.The present invention is by being arranged graded winding, and enhance the insulation characterisitic between coiling group and between coiling group between iron core, reduce voltage difference, make field distribution evenly, and according to the different running temperature in transformer top bottom, the insulating materials of different temperature classifications is set, to effectively extend transformer service life.
Description
Technical field
The present invention relates to a kind of transformer coil winding technical fields, and in particular to a kind of 10kV oil immersions of graded winding
Formula distribution transformer.
Background technology
Transformer is the device for changing alternating voltage using the principle of electromagnetic induction, and main member is primary coil, secondary
Grade coil and iron core (magnetic core), distribution transformer are industrial and mining enterprises and one of the important equipment in civil buildings power supply-distribution system.
As growing continuously and fast for national economy is improved power supply reliability etc. and is proposed to power transformer in energy-saving and environmental protection
Higher requirement.
Oil-immersed transformer is iron core and winding is immersed in the transformer in insulating liquid, it is industrial and mining enterprises and civil buildings
One of important equipment in power supply-distribution system.The safety and rate of ageing of oil-immersed power transformer Oil-Paper Insulation mainly by
To the influence of its internal temperature rise, top-oil temperature is one of the important thermal change amount for describing inside transformer temperature rising state.In transformer
During load running, it is necessary to assure it is no more than limit value.What the cooling scheme of conventional 10kV distribution transformers generally used
It is air-cooled, the general temperature difference for having 10 DEG C or so between the bottom and top layer of such transformer.If not using routine
Segmental structure, such transformer is at full capacity or when overload operation, and the temperature of bottom is relatively low, and aging is slower.And temperature of top
Higher, aging is very fast, reduces the service life of transformer in this way.And temperature of top is higher, aging is very fast, reduces change in this way
The service life of depressor.Transformer life calculation formula is as follows
[15000/(T+273)-27.064]
Life=EXP
Life- transformer lifes
The heatproof index of T- insulation systems
According to the formula, it could be assumed that, the humidity index of insulation system often improves 6-8 DEG C, and transformer life can be the former longevity
2 times of life.So the service life of conventional scheme transformer floor portions and top layer portion is to have differed one times or so.
Invention content
The purpose of the present invention is that solution since bottom when oil-immersed transformer is run and top layer have the larger temperature difference, and leads
The problem of causing insulating materials aging speed to differ.
The present invention is achieved through the following technical solutions above-mentioned purpose：
A kind of 10kV oil immersion-type distribution transformers being made of graded winding, including including iron core folder (10), iron core
(2) and coil windings, it is characterised in that the iron core (2) is fixed by iron core folder (10), and coil windings are sleeved on iron core (2)
On, there are gap and oil duct insulation is arranged with coil windings in the iron core (2), and the coil windings are graded winding structure,
All there is gap between each sectional coil and section insulation is set.
The coil windings include high-tension coil and low-voltage coil, and low-voltage coil is set in iron core outer layer, high-voltage line snare
It is wound on low-voltage coil outer layer；
Oil duct insulation is provided between the high-tension coil and low-voltage coil.
Further, the high-tension coil is at least divided into two sections of coil windings of the first high-tension coil and the second high-tension coil,
The width of section insulation is about 15-20mm between each section of coil of high-tension coil.
Further, the low-voltage coil is at least divided into two sections of coil windings of the first low-voltage coil and the second low-voltage coil,
The width of the section insulation of low-voltage coil is 5-10mm.
Further, the high-tension coil uses the mode of multi-layer cylindrical coil coiling, is arranged between each single layer wire turn
Layer insulation of the insulating paper as winding layer, the first high-tension coil use the DPE insulating papers that temperature resistant grade is 120 DEG C to be used as winding
The interlayer dielectic of layer.Second high-tension coil uses common temperature classification for A grades of insulating materials.
Further, the low-voltage coil using multilayer it is close around mode, insulating paper conduct is set between each single layer coil
The layer insulation of winding layer.
Further, it is 120 DEG C of DPE insulating papers as winding layer that the first low-voltage coil winding, which uses temperature resistant grade,
Layer insulation.Second low-voltage coil uses common temperature classification for A grades of insulating materials.
Compared with prior art, the present invention has the advantages that：
1, for oil immersion-type distribution transformer because of the insulation of its transformer oil, good heat conductivity, transformer oil is cheap, while can solve
Certainly transformer large capacity heat dissipation problem and high-voltage insulation issue.
2, in real transformer, transformer fault, the present invention will be caused higher in temperature once breakdown occurs for insulating paper
Coiler part uses DPE insulating papers, and the long-term heat resisting temperature in transformer oil is 120 DEG C, than conventional model insulating paper
Heat resisting temperature is higher by 15 DEG C.The use of insulating paper can be not only saved, insulating paper working life is extended, it is wide to reduce transformer oil clearance
Degree, and then the volume and core loss of limiting transformer.
3, the coil of different segmentations uses the material of different temperature resistant grades, improves the ageing-resistant performance of transformer.
4, as a result of coil windings segmentation structure, the voltage between layers of coil reduces 50%, the electricity of such coil
Field distribution is more uniform, contributes to the safe operation of transformer.
Description of the drawings
Fig. 1 is the coil windings segmentation structure schematic diagram of the embodiment of the present invention；
Fig. 2 is the transformer device structure schematic diagram of the embodiment of the present invention；
Fig. 3 is the high-tension coil multi-layer cylindrical coiling arrangement schematic diagram of the embodiment of the present invention；
Fig. 4 is the high-tension coil multi-layer cylindrical coiling structural schematic diagram of the embodiment of the present invention；
Wherein, 1- iron cores, the first low-voltage coils of 2-, 3- epimere high-tension coils, 4- high pressure section insulations, the second high-voltage lines of 5-
Circle, 6- oil ducts insulation the second low-voltage coils of one, 7-, 8- oil ducts insulation two, 9- low pressure section insulations, 10- iron core folders, 11- high
Piezoelectricity magnet-wire circle, 12- the first high-tension coil layer insulations, 13- the second high-tension coil layer insulations
Specific implementation mode
With reference to the accompanying drawings and examples, the specific implementation mode of the present invention is described in further detail.Implement below
Example is not limited to the scope of the present invention for illustrating the present invention.
Embodiment 1
A kind of 10kV oil immersion-type distribution transformers being made of graded winding, including including iron core folder (10), iron core
(2) and coil windings, it is characterised in that the iron core (2) is fixed by iron core folder (10), and coil windings are sleeved on iron core (2)
On, there are gap and oil duct insulation is arranged with coil windings in the iron core (2), and the coil windings are graded winding structure,
All there is gap between each sectional coil and section insulation is set.
The coil windings include high-tension coil and low-voltage coil, and low-voltage coil is set in iron core outer layer, high-voltage line snare
It is wound on low-voltage coil outer layer；
Oil duct insulation is provided between the high-tension coil and low-voltage coil.
In the present embodiment, the high-tension coil be at least divided into two sections of coils of the first high-tension coil and the second high-tension coil around
Group, the width of section insulation is about 15-20mm between each section of coil of high-tension coil.
In the present embodiment, the low-voltage coil be at least divided into two sections of coils of the first low-voltage coil and the second low-voltage coil around
The width of group, the section insulation of low-voltage coil is 5-10mm.
In the present embodiment, the high-tension coil uses the mode of multi-layer cylindrical coil coiling, between each single layer wire turn
Layer insulation of the insulating paper as winding layer be set, and the first high-tension coil uses temperature resistant grade for 120 DEG C of DPE insulating paper conducts
The interlayer dielectic of winding layer.Second high-tension coil uses common temperature classification for A grades of insulating materials.
In the present embodiment, the low-voltage coil using multilayer it is close around mode, insulating paper is set between each single layer coil
Layer insulation as winding layer.
In the present embodiment, the first low-voltage coil winding uses temperature resistant grade to be used as 120 DEG C of DPE insulating papers and twines
The layer insulation of winding layer.Second low-voltage coil uses common temperature classification for A grades of insulating materials.
As depicted in figs. 1 and 2, low-voltage coil winding is made of the first low-voltage coil 2 and the second low-voltage coil 7, and two low
There is low pressure section insulation 9 between crimping circle, the low-voltage coil winding set being made of the first low-voltage coil 2 and the second low-voltage coil 7
Loaded on 1 outer layer of iron core, there is oil duct insulation 28 between the two.High-tension coil winding is by the-the first high-tension coil 3 and the second high-voltage line
5 composition of circle, there is high pressure section insulation 4 in centre.High-tension coil winding has oil duct between the two around low-voltage coil winding outer layer
Insulate 1.The width of the low pressure section insulation 9 of low-voltage coil winding is about 5-10mm, and the width of high pressure section insulation 4 is about
15-20mm.
Attached drawing 3 and the cylindrical layer winding winding structure schematic diagram that Fig. 4 is the first high-tension coil.Electromagnetism wire turn 11 is exhausted along oil duct
Setting DPE insulating papers are that layer insulation re-lays next layer of electromagnetism wire turn after one 6 uniform winding of edge is paved with single winding layer, so
It is laid with 5-15 layers of electromagnetism wire turn.
Claims (8)
1. a kind of 10kV oil immersion-type distribution transformers being made of graded winding, including including iron core folder (10), iron core (2)
And coil windings, it is characterised in that the iron core (2) is fixed by iron core folder (10), and coil windings are sleeved on iron core (2), institute
Iron core (2) and coil windings are stated there are gap and oil duct insulation is set, the coil windings are graded winding structure, each to be segmented
All there is gap between coil and section insulation is set.
2. the 10kV oil immersion-type distribution transformers being made of according to claim 1 graded winding, which is characterized in that described
Coil windings include high-tension coil and low-voltage coil, and low-voltage coil is set in iron core outer layer, and high-tension coil is around low-voltage coil
Outer layer；
Oil duct insulation is provided between the high-tension coil and low-voltage coil.
3. the 10kV oil immersion-type distribution transformers according to claim 1 or claim 2 being made of graded winding, which is characterized in that
The high-tension coil is at least divided into two sections of coil windings of the first high-tension coil and the second high-tension coil, each section of coil of high-tension coil it
Between the width of section insulation be about 15-20mm.
4. the 10kV oil immersion-type distribution transformers according to claim 1 or claim 2 being made of graded winding, which is characterized in that
The low-voltage coil is at least divided into two sections of coil windings of the first low-voltage coil winding and the second low-voltage coil winding, low-voltage coil
The width of section insulation is 5-10mm.
5. according to the 10kV oil immersion-type distribution transformers being made of graded winding described in claim any one of 1-3, feature
It is, the high-tension coil uses the mode of multi-layer cylindrical coil coiling, and insulating paper conduct is arranged between each single layer wire turn and twines
The layer insulation of winding layer.
6. the 10kV oil immersion-type distribution transformers being made of according to claim 5 graded winding, which is characterized in that described
First high-tension coil uses layer insulation of the DPE insulating papers as winding layer.
7. the 10kV oil immersion-type distribution transformers being made of graded winding according to claim 1, which is characterized in that
The low-voltage coil uses the mode of multi-layer cylindrical coil coiling, and insulating paper conduct is arranged between each winding of single layer layer line circle and twines
The layer insulation of winding layer.
8. according to claim 1 or 4, which is characterized in that first low-voltage coil is using DPE insulating papers as winding layer
Layer insulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810727963.XA CN108735476A (en) | 2018-07-05 | 2018-07-05 | A kind of 10kV oil immersion-type distribution transformers of graded winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810727963.XA CN108735476A (en) | 2018-07-05 | 2018-07-05 | A kind of 10kV oil immersion-type distribution transformers of graded winding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108735476A true CN108735476A (en) | 2018-11-02 |
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Family Applications (1)
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| CN201810727963.XA Pending CN108735476A (en) | 2018-07-05 | 2018-07-05 | A kind of 10kV oil immersion-type distribution transformers of graded winding |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110752080A (en) * | 2019-11-01 | 2020-02-04 | 深圳市中航比特通讯技术有限公司 | Epoxy resin insulation high-frequency high-voltage transformer |
| CN110890194A (en) * | 2019-11-01 | 2020-03-17 | 深圳市中航比特通讯技术有限公司 | Oil-immersed high-frequency high-voltage transformer |
| EP3979273A1 (en) * | 2020-09-30 | 2022-04-06 | Hitachi Energy Switzerland AG | Split winding assembly for a transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202134377U (en) * | 2011-06-22 | 2012-02-01 | 上海工业变压器有限公司 | Novel oil-immersed transformer |
| CN202887944U (en) * | 2012-05-17 | 2013-04-17 | 常州市光辉变压器制造有限公司 | Sectional type coil of oil-immersed transformer |
| CN103247435A (en) * | 2012-02-13 | 2013-08-14 | 新华都特种电气股份有限公司 | Wound coil structure and processing method |
| CN103500634A (en) * | 2013-10-28 | 2014-01-08 | 三变科技股份有限公司 | 220KV on-load voltage regulation single-phase testing transformer |
| CN207165388U (en) * | 2017-09-13 | 2018-03-30 | 山东印鸿电气有限公司 | The loop construction of the double transformer with split windings of high voltage |
| CN108010689A (en) * | 2018-02-05 | 2018-05-08 | 国网河南省电力公司新乡供电公司 | A kind of dry-type transformer |
| CN108231379A (en) * | 2017-12-18 | 2018-06-29 | 保定天威集团特变电气有限公司 | The insulation system of 35kV high-temperature-resisting transformers |
| CN208673886U (en) * | 2018-07-05 | 2019-03-29 | 广州华立科技职业学院 | A kind of 10kV oil immersion-type distribution transformer of graded winding |
-
2018
- 2018-07-05 CN CN201810727963.XA patent/CN108735476A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202134377U (en) * | 2011-06-22 | 2012-02-01 | 上海工业变压器有限公司 | Novel oil-immersed transformer |
| CN103247435A (en) * | 2012-02-13 | 2013-08-14 | 新华都特种电气股份有限公司 | Wound coil structure and processing method |
| CN202887944U (en) * | 2012-05-17 | 2013-04-17 | 常州市光辉变压器制造有限公司 | Sectional type coil of oil-immersed transformer |
| CN103500634A (en) * | 2013-10-28 | 2014-01-08 | 三变科技股份有限公司 | 220KV on-load voltage regulation single-phase testing transformer |
| CN207165388U (en) * | 2017-09-13 | 2018-03-30 | 山东印鸿电气有限公司 | The loop construction of the double transformer with split windings of high voltage |
| CN108231379A (en) * | 2017-12-18 | 2018-06-29 | 保定天威集团特变电气有限公司 | The insulation system of 35kV high-temperature-resisting transformers |
| CN108010689A (en) * | 2018-02-05 | 2018-05-08 | 国网河南省电力公司新乡供电公司 | A kind of dry-type transformer |
| CN208673886U (en) * | 2018-07-05 | 2019-03-29 | 广州华立科技职业学院 | A kind of 10kV oil immersion-type distribution transformer of graded winding |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110752080A (en) * | 2019-11-01 | 2020-02-04 | 深圳市中航比特通讯技术有限公司 | Epoxy resin insulation high-frequency high-voltage transformer |
| CN110890194A (en) * | 2019-11-01 | 2020-03-17 | 深圳市中航比特通讯技术有限公司 | Oil-immersed high-frequency high-voltage transformer |
| EP3979273A1 (en) * | 2020-09-30 | 2022-04-06 | Hitachi Energy Switzerland AG | Split winding assembly for a transformer |
| CN114334395A (en) * | 2020-09-30 | 2022-04-12 | 日立能源瑞士股份公司 | Split winding assembly for a transformer |
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Effective date of registration: 20181128 Address after: 510000 Hualiyuan Huali Road, Guangshan Highway, Zengcheng, Guangzhou, Guangdong Province Applicant after: Guangzhou Huali College of Science and Technology Applicant after: GUANGZHOU YINBIAN POWER EQUIPMENT CO., LTD. Address before: 510000 Huali Road, Guangzhou Huali Science Park, Zengcheng, Guangzhou, Guangdong Province Applicant before: Guangzhou Huali College of Science and Technology |