CN111899967B - Oil sealing method and structure for improving temperature rise of high-capacity high-voltage converter transformer - Google Patents
Oil sealing method and structure for improving temperature rise of high-capacity high-voltage converter transformer Download PDFInfo
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- CN111899967B CN111899967B CN202010865143.4A CN202010865143A CN111899967B CN 111899967 B CN111899967 B CN 111899967B CN 202010865143 A CN202010865143 A CN 202010865143A CN 111899967 B CN111899967 B CN 111899967B
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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
- H01F27/322—Insulating of coils, windings, or parts thereof the insulation forming channels for circulation of the fluid
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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
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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
- H01F27/327—Encapsulating or impregnating
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulating Of Coils (AREA)
Abstract
The invention relates to an oil sealing method and structure for improving temperature rise of a high-capacity high-voltage converter transformer, and belongs to the technical field of transformers. The technical scheme is as follows: the main empty passages among the transformer windings are sealed by adopting soft insulating paper to form an oil sealing structure, so that transformer oil flowing through the coils is guided, the temperature rise value of the transformer is relieved, and the oil sealing structure is effectively simplified. The invention has the following positive effects: the oil sealing structure of the large-capacity high-voltage converter transformer adopting the OD structure cooling mode adopts soft insulating paper, so that the field intensity weak point of an end insulating part can be improved while the oil sealing effect is ensured, the insulation aging rate of a coil of the converter transformer is improved, the service life is prolonged, the insulation oil sealing structure is easy to realize, and the temperature rise of the converter transformer is reduced.
Description
Technical Field
The invention relates to an oil sealing method and structure for improving temperature rise of a high-capacity high-voltage converter transformer, and belongs to the technical field of transformers.
Background
Along with the improvement OF the capacity and the voltage grade OF the converter transformer and the restriction OF the altitude, the environmental temperature and the transportation condition, the OF cooling mode in the prior art can not meet the current conversion requirement OF the high-capacity high-voltage converter transformer, because the valve side OF the converter transformer is OF a full-insulation structure, the number OF end insulation parts is large, the distribution OF an equilibrium electric field is difficult, the field intensity OF the end part is concentrated, and if a lower oil sealing structure is adopted, the oil sealing effect restricts the temperature rise OF the converter transformer.
Disclosure of Invention
The invention aims to provide an oil sealing method and structure for improving the temperature rise of a high-capacity high-voltage converter transformer.
The technical scheme of the invention is as follows:
an oil sealing structure for improving the temperature rise of a high-capacity high-voltage converter transformer is characterized in that soft insulating paper is adopted for sealing between main empty channels among transformer windings to form the oil sealing structure, so that transformer oil passing through coils is guided, the temperature rise value of the transformer is relieved, the oil sealing structure is effectively simplified, and the running reliability of the transformer is improved.
The soft insulating paper is an insulating binding tape, and is wound between main empty channels between the insulating cylinders along the circumferential direction to form a sealing binding tape, so that oil is sealed between the insulating cylinders; the sealing binding band is pressed tightly by a stay; the sealing bandage is located between the insulating cylinder and the stay.
The sealing bandage is two layers, namely a sealing bandage I and a sealing bandage II, which are arranged along the circumferential direction of the transformer winding, openings which are equidistant along the circumferential direction are arranged on the soft insulating paper, the sealing bandage I and the sealing bandage II are arranged between the main air channel from top to bottom, and the openings of the two layers of sealing bandages are arranged in a staggered manner.
An oil sealing method for improving the temperature rise of a high-capacity high-voltage converter transformer adopts soft insulating paper to seal main empty passages among transformer windings to form an oil sealing structure, so that transformer oil flowing through a coil is guided, the temperature rise value of the transformer is relieved, the oil sealing structure is effectively simplified, and the running reliability of the transformer is improved; the soft insulating paper is an insulating binding tape, and is wound between main empty channels between the insulating cylinders along the circumferential direction to form a sealing binding tape, so that oil is sealed between the insulating cylinders; the sealing binding band is pressed tightly by a stay; the sealing bandage is located between the insulating cylinder and the stay.
According to the invention, soft insulating paper is adopted between the insulating cylinders of the main insulation of the transformer to form the oil sealing ring, and the high-temperature insulating material is adhered to the contact parts of the clamping piece, the pressing plate and the supporting plate, so that the space is saved and the installation is convenient; the shielding between the lead outgoing line and the clamping piece web plate can be effectively optimized, and the operation reliability of the converter transformer is improved.
The sealing bandage is formed by winding soft insulating paper with the thickness of 0.3mm, is tightly combined with the insulating cylinder and is pressed by a stay.
Because the field intensity of the end part of the converter transformer is in high field intensity and concentrated, the requirement of the field intensity cannot be met by using the conventional sealing ring structure at the lower part of the low-end converter transformer, and the soft insulating paper sealing structure is adopted between the main empty channels, so that the electrical stability of the high field intensity area at the end part is effectively improved.
The invention has the following positive effects: the oil sealing structure of the large-capacity high-voltage converter transformer adopts an OD structure cooling mode and adopts soft-state insulating paper, so that the field intensity weak point of an end insulating part can be improved while the oil sealing effect is ensured, the insulation aging rate of a coil of the converter transformer is improved, the service life is prolonged, the insulation oil sealing structure is easy to realize, and the temperature rise of the converter transformer is reduced.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
FIG. 2 is a schematic diagram of an embodiment of the present invention applied between windings;
FIG. 3 is a schematic view of a partial enlarged structure according to an embodiment of the present invention;
FIG. 4 is a schematic view of an insulation strap treatment according to an embodiment of the present invention;
in the figure: winding A1, insulating cylinder 2, sealing ring 3, sealing band I4, end insulator 5, stay 6, sealing band II 7, opening 8, and winding B9.
Detailed Description
The invention is further described with reference to the following figures and examples:
an oil sealing structure for improving the temperature rise of a high-capacity high-voltage converter transformer is characterized in that soft insulating paper is adopted for sealing between main empty channels among transformer windings to form the oil sealing structure, so that transformer oil flowing through a coil is guided, the temperature rise value of the transformer is relieved, the oil sealing structure is effectively simplified, and the reliability of the operation of the transformer is improved.
The soft insulating paper is an insulating bandage and is wound between main empty channels between the insulating cylinders 2 along the circumferential direction to form a sealing bandage, and oil is sealed between the insulating cylinders 2; the sealing binding band is pressed by a stay 6; the sealing band is located between the insulating cylinder 2 and the stay 6.
The sealing binding bands are two layers, namely a first sealing binding band 4 and a second sealing binding band 7 which are arranged along the circumferential direction of the transformer winding, openings 8 which are equidistant along the circumferential direction are formed in the soft insulating paper, the first sealing binding band 4 and the second sealing binding band 7 are arranged between the main air channels up and down, and the openings of the two layers of sealing binding bands are arranged in a staggered mode.
An oil sealing method for improving the temperature rise of a high-capacity high-voltage converter transformer adopts soft insulating paper to seal main empty passages among transformer windings to form an oil sealing structure, so that transformer oil flowing through a coil is guided, the temperature rise value of the transformer is relieved, the oil sealing structure is effectively simplified, and the running reliability of the transformer is improved; the soft insulating paper is an insulating binding tape, and is wound between main empty channels between the insulating cylinders 2 along the circumferential direction to form a sealing binding tape, so that oil is sealed between the insulating cylinders 2; the sealing binding band is pressed tightly by a stay 6; the sealing band is located between the insulating cylinder 2 and the stay 6.
According to the invention, soft insulating paper is adopted between the insulating cylinders of the main insulation of the transformer to form the oil sealing ring, and the high-temperature insulating material is adhered to the contact parts of the clamping piece, the pressing plate and the supporting plate, so that the space is saved and the installation is convenient; the shielding between the lead outgoing line and the clamping piece web plate can be effectively optimized, and the operation reliability of the converter transformer is improved.
The sealing binding band is formed by winding soft insulating paper with the thickness of 0.3mm, is tightly combined with the insulating cylinder 2 and is pressed by the stay 6.
Because the field intensity of the end part of the converter transformer is in high field intensity and concentrated, the requirement of the field intensity cannot be met by using the conventional sealing ring structure at the lower part of the low-end converter transformer, and the soft insulating paper sealing structure is adopted between the main empty channels, so that the electrical stability of the high field intensity area at the end part is effectively improved.
As shown in fig. 2, a sealing band is applied between the insulating cylinder 2 and the stay 6. As shown in FIG. 4, the first two layers of the soft insulating paper are provided with openings at equal intervals, and the two layers are arranged in a staggered way when being placed. The soft state insulating paper replaces the sealing ring of the prior low-end converter transformer.
Claims (1)
1. An oil sealing method for improving temperature rise of a high-capacity high-voltage converter transformer is characterized by comprising the following steps: the main empty passages among the transformer windings are sealed by adopting soft insulating paper to form an oil sealing structure, so that transformer oil flowing through the coils is guided, the temperature rise value of the transformer is relieved, the oil sealing structure is effectively simplified, and the running reliability of the transformer is improved; the soft insulating paper is an insulating binding tape, and is wound between main empty channels between the insulating cylinders (2) along the circumferential direction to form a sealing binding tape, so that oil is sealed between the insulating cylinders; the sealing binding band is pressed by a stay (6); the sealing binding band is positioned between the insulating cylinder (2) and the stay (6); the sealing bandage is divided into two layers, namely a first sealing bandage (4) and a second sealing bandage (7), and the first sealing bandage and the second sealing bandage are arranged along the circumferential direction of the transformer winding; openings (8) which are arranged at equal intervals along the circumferential direction are formed in the soft insulating paper, the first sealing binding belt (4) and the second sealing binding belt (7) are arranged up and down between the main empty channels, and the openings of the two layers of sealing binding belts are arranged in a staggered mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010865143.4A CN111899967B (en) | 2020-08-25 | 2020-08-25 | Oil sealing method and structure for improving temperature rise of high-capacity high-voltage converter transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010865143.4A CN111899967B (en) | 2020-08-25 | 2020-08-25 | Oil sealing method and structure for improving temperature rise of high-capacity high-voltage converter transformer |
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| Publication Number | Publication Date |
|---|---|
| CN111899967A CN111899967A (en) | 2020-11-06 |
| CN111899967B true CN111899967B (en) | 2022-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010865143.4A Active CN111899967B (en) | 2020-08-25 | 2020-08-25 | Oil sealing method and structure for improving temperature rise of high-capacity high-voltage converter transformer |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202549586U (en) * | 2012-05-23 | 2012-11-21 | 山东电力设备有限公司 | Transformer coil interlayer oil duct bracing strip fixing structure |
| CN207781374U (en) * | 2017-12-15 | 2018-08-28 | 保定保菱变压器有限公司 | A kind of novel transformer oil enveloping structure |
| CN110047650A (en) * | 2019-05-23 | 2019-07-23 | 重庆源通电器设备制造有限责任公司 | A kind of safeguard structure of transformer coil and preparation method thereof |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101692408B (en) * | 2009-09-21 | 2011-08-10 | 保定天威集团有限公司 | Method for hybrid major insulation of oil immersed transformer |
| CN202025620U (en) * | 2010-12-31 | 2011-11-02 | 保定天威集团有限公司 | Converter transformer body internal oil sealing structure |
| CN103268806A (en) * | 2013-06-06 | 2013-08-28 | 国家电网公司 | 10kV oil-immersed transformer |
| CN205810528U (en) * | 2016-07-13 | 2016-12-14 | 上海置信电气非晶有限公司 | A kind of amorphous transformer oil duct stay, oil duct finished product and winding |
| CN206349235U (en) * | 2017-01-03 | 2017-07-21 | 河南森源电气股份有限公司 | A kind of transformer main empty path insulating part and transformer |
| CN106783137B (en) * | 2017-01-03 | 2018-04-10 | 河南森源电气股份有限公司 | A kind of Transformer Winding processing method |
| CN207663897U (en) * | 2017-12-12 | 2018-07-27 | 中国西电电气股份有限公司 | A kind of oil guide structure for forced oil-circulation transformer body |
| CN210805491U (en) * | 2019-12-16 | 2020-06-19 | 沈阳飞驰电气设备有限公司 | Angle ring insulation structure used in high-voltage and low-voltage windings of energy-saving transformer |
-
2020
- 2020-08-25 CN CN202010865143.4A patent/CN111899967B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202549586U (en) * | 2012-05-23 | 2012-11-21 | 山东电力设备有限公司 | Transformer coil interlayer oil duct bracing strip fixing structure |
| CN207781374U (en) * | 2017-12-15 | 2018-08-28 | 保定保菱变压器有限公司 | A kind of novel transformer oil enveloping structure |
| CN110047650A (en) * | 2019-05-23 | 2019-07-23 | 重庆源通电器设备制造有限责任公司 | A kind of safeguard structure of transformer coil and preparation method thereof |
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| CN111899967A (en) | 2020-11-06 |
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