CN114156073A - Dry-type transformer high-low voltage cooling air passage layer arrangement structure and processing method - Google Patents
Dry-type transformer high-low voltage cooling air passage layer arrangement structure and processing method Download PDFInfo
- Publication number
- CN114156073A CN114156073A CN202111216166.3A CN202111216166A CN114156073A CN 114156073 A CN114156073 A CN 114156073A CN 202111216166 A CN202111216166 A CN 202111216166A CN 114156073 A CN114156073 A CN 114156073A
- Authority
- CN
- China
- Prior art keywords
- cooling air
- dry
- voltage coil
- type transformer
- temperature rise
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- H01F27/085—Cooling by ambient air
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
The invention relates to the technical field of transformers, in particular to a high-low voltage cooling air passage layer arrangement structure of a dry-type transformer and a processing method. The structure specifically includes: an iron core and an external high-low voltage coil; the iron core is wrapped by the low-voltage coil; a high-voltage coil is arranged outside the low-voltage coil; and cooling air passages are arranged between the high-voltage coil layers. The arrangement structure avoids overhigh temperature of the hottest point of the area, optimizes the heat dissipation coefficient, and plays a great role in maintaining the service life of the transformer compared with the traditional scheme of simply arranging the air passage in the middle of the winding.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to a high-low voltage cooling air passage layer arrangement structure of a dry-type transformer and a processing method.
Background
In the operation process of the dry-type power transformer, all electromagnetic carriers such as iron cores, windings, leads, structural members capable of being interlinked in a magnetic leakage place and the like are heating bodies, and the iron cores and the windings are main heating bodies. The transformer winding generates heat due to resistance loss, stray loss, lead loss and the like, and part of the heat is stored in a heating body of the transformer, so that the temperature of the heating body is increased; another part of the heat is dissipated to the surrounding medium. The heat generated by the heating element, in addition to raising its own temperature, also raises the temperature of the surrounding medium, and especially when the local temperature rise is too high, may cause premature insulation damage, or the insulation aging due to the long-term high temperature effect of the insulation medium, and also gradually loses the insulation performance.
The high-low voltage winding of the common resin insulation dry-type power transformer mostly adopts a layer winding, namely, a cylindrical mould is used as an axis, and the layer winding is fully paved layer by layer in the upward accumulation mode in the clockwise or anticlockwise direction, so that the copper wire is wound to the specified number of turns. Cooling air passages need to be arranged between the layers in the winding to meet the design temperature rise requirement. In the traditional winding temperature rise calculation, the reasonability of the arrangement position of the air passage in the winding is not clearly analyzed, the air passage and the winding are treated as an integral heating body, and the maximum point temperature is not strictly determined whether to exceed the maximum value which can be borne by the insulating material or not according to the winding temperature rise conditions in the front and the rear areas of the air passage. The temperature rise value of the whole winding meets the national standard, but the temperature rise of the winding in the area exceeds the temperature rise value in practice, so that insulation aging is caused, and short circuit is caused.
Therefore, it is an urgent need to solve the technical problem in the art to provide a dry-type transformer high and low voltage cooling air duct layer arrangement structure and a processing method thereof.
Disclosure of Invention
The invention aims to provide a high-low voltage cooling air passage layer arrangement structure of a dry type transformer and a processing method thereof, the arrangement structure and the processing method thereof avoid overhigh temperature of the hottest point of the area, optimize the heat dissipation coefficient, and play a great role in maintaining the service life of the transformer compared with the traditional scheme of simply arranging the air passages in the middle of a winding.
In order to achieve the above object, the present invention provides a dry-type transformer high and low voltage cooling air duct layer arrangement structure, including: an iron core and an external high-low voltage coil; the iron core is wrapped by the low-voltage coil; a high-voltage coil is arranged outside the low-voltage coil; and cooling air passages are arranged between the high-voltage coil layers.
Preferably, the number of the high-voltage coil layers is 9, and 1 cooling air channel is arranged in the high-voltage coil.
Preferably, the cooling gas ducts are located between 3 and 4 layers of the high voltage coil.
The invention also provides a layer arrangement processing method for the high-low pressure cooling air passages of the dry-type transformer, which comprises the following steps: firstly, calculating and analyzing the winding temperature rise of the dry-type transformer; secondly, analyzing the arrangement position of a high-low voltage cooling air passage of the dry-type transformer; and finally, assembling the layer arrangement structure of the high-low voltage cooling air passages of the dry-type transformer.
Preferably, calculating and analyzing the winding temperature rise of the dry-type transformer comprises:
and calculating the winding temperature rise of the dry-type transformer, and determining the temperature rise of the inner side and the outer side of the winding air passage and the integral stable temperature rise.
Preferably, analyzing the arrangement positions of the high-low voltage cooling air passages of the dry-type transformer comprises:
and when the cooling air channel is arranged between different high-voltage coil layers, the winding temperature rise and the heat dissipation coefficient of the transformer are compared.
According to the technical scheme, the arrangement of the cooling air passage position is analyzed by fully considering the temperature rise of the winding during calculation, so that the condition that insulation is accelerated to age on the inner side of the high-voltage winding under the condition of long-term rated load is avoided, and the service life of the whole transformer is prolonged.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a high-low voltage cooling air duct layer arrangement structure of a dry-type transformer in an embodiment provided by the invention.
Description of the reference numerals
1-iron core
2-low voltage coil
3-high voltage coil
4-Cooling airway
Detailed Description
The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the present invention, unless otherwise specified, the directional terms included in the terms merely represent the directions of the terms in a conventional use state or are colloquially known by those skilled in the art, and should not be construed as limiting the terms.
As shown in fig. 1, the present invention provides a high-low voltage cooling air duct layer arrangement structure of a dry-type transformer, including: an iron core 1 and an external high-low voltage coil; the iron core 1 is wrapped by the low-voltage coil 2; a high-voltage coil 3 is arranged outside the low-voltage coil 2; and cooling air passages 4 are arranged between the layers of the high-voltage coil 3.
In a preferred embodiment of the present invention, the number of high-voltage coils 3 is 9, and 1 cooling gas duct 4 is built in.
In a preferred embodiment of the invention, the cooling gas ducts 4 are located between 3 and 4 layers of the high-voltage coil 3.
The invention also provides a processing method for the layer arrangement of the high-low pressure cooling air passages of the dry-type transformer, which comprises the following steps: firstly, calculating and analyzing the winding temperature rise of the dry-type transformer; secondly, analyzing the arrangement position of a high-low voltage cooling air passage of the dry-type transformer; and finally, assembling the layer arrangement structure of the high-low voltage cooling air passages of the dry-type transformer.
In a preferred embodiment of the present invention, calculating and analyzing the winding temperature rise of the dry-type transformer comprises:
and calculating the winding temperature rise of the dry-type transformer, and determining the temperature rise of the inner side and the outer side of the winding air passage and the overall stable temperature rise so as to avoid overhigh temperature of the hottest point of the area.
In a preferred embodiment of the present invention, analyzing the arrangement positions of the high and low voltage cooling air passages of the dry-type transformer includes:
and when the cooling air passages are arranged among different high-voltage coil layers, the winding temperature rise and the heat dissipation coefficient of the transformer are compared to determine the optimal position of the layer number arrangement of the cooling air passages.
Through the technical scheme, the full consideration is carried out when the temperature rise of the winding is calculated, the arrangement of the cooling air passage position is analyzed, the inner side of the high-voltage winding is avoided, the insulation accelerated aging condition is caused under the condition of long-term rated load, and the whole service life of the transformer is prolonged.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (6)
1. The utility model provides a dry-type transformer high-low pressure cooling air flue layer number arrangement structure which characterized in that includes: an iron core (1) and an external high-low voltage coil; the iron core (1) is wrapped by a low-voltage coil (2); a high-voltage coil (3) is arranged outside the low-voltage coil (2); and cooling air passages (4) are arranged among the layers of the high-voltage coil (3).
2. The arrangement according to claim 1, characterized in that the number of layers of the high voltage coil (3) is 9, and 1 cooling air duct (4) is built in.
3. A structure according to claim 1, characterized in that the cooling air ducts (4) are located between 3 and 4 layers of the high-voltage coil (3).
4. A method for processing a high-low pressure cooling air duct layer arrangement structure of a dry-type transformer according to any one of claims 1-3, characterized by comprising the following steps: firstly, calculating and analyzing the winding temperature rise of the dry-type transformer; secondly, analyzing the arrangement position of a high-low voltage cooling air passage of the dry-type transformer; and finally, assembling the layer arrangement structure of the high-low voltage cooling air passages of the dry-type transformer.
5. The process of claim 4, wherein said calculating and analyzing the winding temperature rise of the dry-type transformer comprises:
and calculating the winding temperature rise of the dry-type transformer, and determining the temperature rise of the inner side and the outer side of the winding air passage and the integral stable temperature rise.
6. The manufacturing method according to claim 4, wherein the analyzing the arrangement positions of the high-low pressure cooling air passages of the dry-type transformer comprises:
and when the cooling air channel is arranged between different high-voltage coil layers, the winding temperature rise and the heat dissipation coefficient of the transformer are compared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111216166.3A CN114156073A (en) | 2021-10-19 | 2021-10-19 | Dry-type transformer high-low voltage cooling air passage layer arrangement structure and processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111216166.3A CN114156073A (en) | 2021-10-19 | 2021-10-19 | Dry-type transformer high-low voltage cooling air passage layer arrangement structure and processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114156073A true CN114156073A (en) | 2022-03-08 |
Family
ID=80462782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111216166.3A Pending CN114156073A (en) | 2021-10-19 | 2021-10-19 | Dry-type transformer high-low voltage cooling air passage layer arrangement structure and processing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114156073A (en) |
-
2021
- 2021-10-19 CN CN202111216166.3A patent/CN114156073A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6157282A (en) | Transformer cooling method and apparatus therefor | |
| JP4588214B2 (en) | Transformer made of amorphous metal having a substantially rectangular coil | |
| KR101967877B1 (en) | Method of assembling transformer core and winding, and method of manufacturing transformer using same | |
| CN114156073A (en) | Dry-type transformer high-low voltage cooling air passage layer arrangement structure and processing method | |
| CN103050245A (en) | Low-tension winding of large-capacity transformer | |
| JPS6410923B2 (en) | ||
| CN105122391A (en) | Coil assembly for a dry transformer; method for manufacturing a coil assembly and dry transformer | |
| CN203850132U (en) | Amorphous alloy transformer coil | |
| CA2326328A1 (en) | Dry-type transformer having a generally rectangular, resin encapsulated coil | |
| US2840790A (en) | Tapped winding arrangement for variable ratio transformer | |
| KR200432586Y1 (en) | Pole transformer | |
| CN112560335B (en) | Multi-objective and structural parameter comprehensive optimization design method for transformer | |
| CN117612835B (en) | High-voltage winding for dry-type transformer and dry-type transformer | |
| JPS63211711A (en) | High frequency transformer | |
| CN211879194U (en) | Winding structure of dry type transformer coil | |
| JP2007123625A (en) | Current transformer and manufacturing method thereof | |
| CN220106227U (en) | Multi-split transformer with axial and radial combined | |
| CN116313439B (en) | Insulation pouring structure and pouring manufacturing method for high-voltage coil of transformer | |
| CN215988334U (en) | Transformer body structure with good heat dissipation performance | |
| CN202205565U (en) | Transformer winding | |
| CN102903486A (en) | Power transformer | |
| CN111383829A (en) | Dry-type transformer | |
| CN218631627U (en) | Low-voltage low-power transformer suitable for high-altitude environment | |
| CN217588649U (en) | Coil structure of high pressure regulating integral type neutral point pressure regulating | |
| JP3069979U (en) | Step-up transformer for magnetron drive |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |