CN113270244B - Converter transformer coil structure with formed angle ring and manufacturing method thereof - Google Patents
Converter transformer coil structure with formed angle ring and manufacturing method thereof Download PDFInfo
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- CN113270244B CN113270244B CN202110447510.3A CN202110447510A CN113270244B CN 113270244 B CN113270244 B CN 113270244B CN 202110447510 A CN202110447510 A CN 202110447510A CN 113270244 B CN113270244 B CN 113270244B
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- angle ring
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- supporting strips
- forming angle
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F5/00—Coils
- H01F5/06—Insulation of windings
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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
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- 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
- H01F41/02—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 for manufacturing cores, coils, or magnets
- H01F41/04—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 for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/12—Insulating of windings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Coils Of Transformers For General Uses (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
The invention relates to a converter transformer coil structure with a forming angle ring, which comprises: the coil comprises a coil body and main supporting strips, wherein the main supporting strips are arranged close to the inner diameter circumference of the coil body; the shaping angle ring sets up the outside at the internal diameter side of coil body, shaping angle ring including leading oily shaping angle ring, supplementary stay bonds at the lateral surface of leading oily shaping angle ring, supplementary stay is parallel with main stay. The invention also relates to a manufacturing method of the converter transformer coil structure with the molded angle ring. The auxiliary stay is added on the existing oil guide forming angle ring, so that the hidden dangers of bulging appearance, unblocked oil flow, reduced heat dissipation efficiency and the like caused by deformation of the existing oil guide forming angle ring can be effectively prevented, the hidden dangers of blocking oil flow and oil leakage are eliminated, the heat dissipation capacity of the oil flow flowing through the winding is increased, the coil is easy to realize on the premise of not changing the insulation strength, the mechanical property and the integral structure of the coil, and the coil has a good application prospect.
Description
Technical Field
The invention belongs to the technical field of converter transformer components, and particularly relates to a converter transformer coil structure with a formed angle ring and a manufacturing method thereof.
Background
The converter transformer is one of key devices in an ultrahigh voltage direct current transmission system, converts alternating current electric energy in an alternating current network into direct current electric energy together with a converter, and transmits the direct current electric energy to a remote place through an ultrahigh voltage direct current transmission line, or converts the direct current electric energy in the direct current transmission line into normal alternating current electric energy together with the converter and transmits the normal alternating current electric energy to the ultrahigh voltage alternating current network.
The special working condition of the converter transformer determines that the main insulation of the converter transformer bears the whole electric field action born by the AC transformer and the electric field action under the test voltage, and simultaneously bears the direct current electric field action in normal work, the polarity reversal voltage action in the accident state and the reverse work and the direct current electric field action under the direct current test voltage. In order to enhance the electrical performance, an oil guiding and forming angle ring is placed at the coil end of the converter transformer.
At present, an oil guide forming angle ring at the end part of a converter transformer coil is generally split in the circumferential direction and is lapped at a stay position; in the baking and heating process of the coil and the transformer body, the oil guide forming angle ring may deform and bulge, so that the problem of unsmooth oil flow is caused, the heat dissipation efficiency is further reduced, and the product performance is influenced.
Disclosure of Invention
The invention aims to overcome the problems that the insulation performance of a coil is reduced and the assembly size is influenced due to the baking deformation of an oil guide forming angle ring, so that the flowing of insulation oil and the oil leakage and oil leakage conditions are blocked, and the heat dissipation efficiency is reduced. The technical scheme adopted by the invention is as follows:
a converter transformer coil structure with a formed angle ring comprises: the coil comprises a coil body and main supporting strips, wherein the main supporting strips are arranged along the circumference of the inner diameter of the coil body in a manner of clinging to the coil body; the forming angle ring is arranged on the outer side of the inner diameter side of the coil body and comprises an oil guide forming angle ring and auxiliary supporting strips, the auxiliary supporting strips are bonded on the outer side surface of the oil guide forming angle ring and are parallel to the main supporting strips, and the auxiliary supporting strips are arranged between every two adjacent main supporting strips; at the downside of shaping angle ring, set gradually: first insulating end circle, second insulating end circle.
A manufacturing method of a converter transformer coil structure with a formed angle ring is used for manufacturing the converter transformer coil structure with the formed angle ring, and comprises the following steps:
and 4, sequentially arranging the following parts on the outer diameter side of the forming angle ring: the paper box comprises a first layer of paper board, a first layer of supporting strips, a second layer of paper board, a second layer of supporting strips and a hard paper tube;
and 5, sequentially arranging the following parts on the lower side of the forming angle ring: first insulating end circle, second insulating end circle, oil guide coil.
The invention has the beneficial effects that:
the electric field at the end part of the coil of the converter transformer is complex, and the most outstanding problem of the insulation structure of the converter transformer is that the working voltage contains a direct current component, so that the converter transformer is an alternating current-direct current composite electric field, and the key is to ensure the reliable insulation of the end part and the smooth oil flow. Therefore, the auxiliary stay is added on the existing oil guide forming angle ring, so that the hidden troubles of bulging appearance, non-smooth oil flow, low heat dissipation efficiency and the like caused by the deformation of the existing oil guide forming angle ring can be effectively prevented, the hidden troubles of blocking oil flow and oil leakage are further eliminated, the heat dissipation capacity of the oil flow flowing through the winding is increased, the coil is easy to realize on the premise of not changing the insulation strength, the mechanical property and the integral structure of the coil, and the coil has a good application prospect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are specific embodiments of the invention, and that other drawings within the scope of the present application can be obtained by those skilled in the art without inventive effort.
FIG. 1 is a partial cross-sectional view of a coil structure of an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a prior art oil guide forming angle ring;
FIG. 3 is a cross-sectional view of a profiled corner ring of an embodiment of the present invention;
FIG. 4 is a partial top view of a contoured corner ring according to an embodiment of the present invention;
in the figure, 1-oil guide forming angle ring, 2-auxiliary stay, 3-coil body, 4-first layer of paper board, 5-first layer of stay, 6-second layer of paper board, 7-second layer of stay, 8-hard paper cylinder, 9-main stay, 10-oil guide coil, 11-forming angle ring, 12-coil oil duct cushion block, 13-electrostatic ring, 14-first insulating end ring and 15-second insulating end ring.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the coil structure according to the embodiment of the present invention is a partial cross-sectional view (in fig. 1, the left side is the coil inner diameter side, and the right side is the coil outer diameter side). A converter transformer coil structure with a formed angle ring comprises: the coil comprises a coil body 3, wherein a coil oil duct cushion block 12 is arranged in the coil body 3, and a static ring 13 is arranged at the lower end part of the coil body 3. The inner diameter side of the coil body 3 is sequentially provided with: the paper-making machine comprises a first layer of paper board 4, a first layer of supporting strips 5, a second layer of paper board 6, a second layer of supporting strips 7, a hard paper cylinder 8, a forming angle ring 11 and main supporting strips 9. The main stays 9 are circumferentially arranged in close contact with the inner diameter of the coil body 3, and mainly function as axial oil passages.
On the lower side of the forming angle ring 11, there are sequentially arranged: a first insulating end ring 14, a second insulating end ring 15 and an oil guide coil 10.
Fig. 2 is a cross-sectional view of a conventional oil guide forming angle ring. The existing oil guide forming angle ring 1 is an angle ring with a certain radian and an L-shaped cross section, the radian of the angle ring is matched with the inner diameter side of a transformer coil, and a plurality of split oil guide forming angle rings are combined into a circle.
FIG. 3 is a cross-sectional view of a contoured corner ring according to an embodiment of the present invention; FIG. 4 is a partial top view of a contoured corner ring according to an embodiment of the present invention. The forming angle ring 11 is formed by fixedly arranging auxiliary stays 2 on the outer side surface (the side surface connected with the coil body 3) of the original oil guide forming angle ring 1 in an adhesion mode, wherein the auxiliary stays 2 are parallel to the main stay 9. The auxiliary stay 2 is arranged between two adjacent main stays 9, so that the hidden danger that the oil guide forming angle ring is deformed is eliminated. The auxiliary stays 2 are arranged in the middle of two adjacent main stays 9 when the profiled corner ring 11 is placed in the circumferential direction of the coil body 3.
A manufacturing method of a converter transformer coil structure with a formed angle ring is used for manufacturing the converter transformer coil structure with the formed angle ring, and comprises the following steps:
and step 4, sequentially arranging on the outer diameter side of the forming angle ring 11: the paper packaging structure comprises a first layer of paper board 4, a first layer of supporting strips 5, a second layer of paper board 6, a second layer of supporting strips 7 and a hard paper cylinder 8;
and step 5, sequentially arranging the following components on the lower side of the forming angle ring 11: a first insulating end ring 14, a second insulating end ring 15 and an oil guide coil 10.
Further, a coil oil passage block 12 is provided in the coil body 3, and an electrostatic ring 13 is provided at a lower end portion of the coil body 3.
Finally, it is to be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, and the scope of the present invention is not limited thereto. Those skilled in the art will understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein.
Claims (5)
1. The utility model provides a converter transformer coil structure of area shaping angle ring which characterized in that includes: the coil comprises a coil body (3) and main supporting strips (9), wherein the main supporting strips (9) are arranged close to the inner diameter circumference of the coil body (3); the forming angle ring (11) is arranged on the outer side of the inner diameter side of the coil body (3), the forming angle ring (11) comprises an oil guide forming angle ring (1) and auxiliary supporting strips (2), the auxiliary supporting strips (2) are bonded on the outer side surface of the oil guide forming angle ring (1), the auxiliary supporting strips (2) are parallel to the main supporting strips (9), and the auxiliary supporting strips (2) are arranged between every two adjacent main supporting strips (9);
the lower side of the forming angle ring (11) is sequentially provided with: a first insulating end ring (14) and a second insulating end ring (15);
the inner diameter side of the coil body (3) is sequentially provided with: the paper-making machine comprises a first layer of paper board (4), a first layer of supporting strips (5), a second layer of paper board (6), a second layer of supporting strips (7), a hard paper cylinder (8) and a forming angle ring (11);
an oil guide coil (10) is arranged on the lower side of the second insulating end ring (15).
2. The structure of a converter transformer coil with a formed angle ring as claimed in claim 1, characterized in that a coil oil-way spacer (12) is provided in the coil body (3), and a static ring (13) is provided at the lower end of the coil body (3).
3. A method for manufacturing a converter transformer coil structure with a formed angle ring, which is used for manufacturing the converter transformer coil structure with a formed angle ring according to claim 2, comprising the steps of:
step 1, adhering an auxiliary stay (2) to the outer side surface of the conventional oil guide forming angle ring (1) to manufacture a forming angle ring (11);
step 2, adhering and arranging the main stay (9) close to the inner diameter circumference of the coil body (3);
step 3, bonding a forming angle ring (11) on the outer side of the inner diameter side of the coil body (3), wherein the auxiliary stay (2) is parallel to the main stay (9);
and step 4, sequentially arranging the following components on the outer diameter side of the forming angle ring (11): the structure comprises a first layer of paper board (4), a first layer of supporting strips (5), a second layer of paper board (6), a second layer of supporting strips (7) and a hard paper cylinder (8);
and step 5, sequentially arranging the following components on the lower side of the forming angle ring (11): a first insulating end ring (14), a second insulating end ring (15) and an oil guide coil (10).
4. A method for manufacturing a coil structure of a converter transformer with a formed angle ring according to claim 3, characterized in that in step 3, the auxiliary stays (2) are arranged between two adjacent main stays (9).
5. The manufacturing method of the converter transformer coil structure with the formed angle ring according to claim 3, characterized in that a coil oil duct cushion block (12) is provided in the coil body (3), and an electrostatic ring (13) is provided at the lower end of the coil body (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110447510.3A CN113270244B (en) | 2021-04-25 | 2021-04-25 | Converter transformer coil structure with formed angle ring and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110447510.3A CN113270244B (en) | 2021-04-25 | 2021-04-25 | Converter transformer coil structure with formed angle ring and manufacturing method thereof |
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| Publication Number | Publication Date |
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| CN113270244A CN113270244A (en) | 2021-08-17 |
| CN113270244B true CN113270244B (en) | 2022-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110447510.3A Active CN113270244B (en) | 2021-04-25 | 2021-04-25 | Converter transformer coil structure with formed angle ring and manufacturing method thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208271708U (en) * | 2018-05-19 | 2018-12-21 | 昆明耀龙置信变压器制造有限公司 | A kind of oil-immersed transformer oil channel structure |
| CN211604875U (en) * | 2020-04-27 | 2020-09-29 | 云南变压器电气股份有限公司 | Traction transformer based on natural ester insulating liquid |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101425368B (en) * | 2008-05-07 | 2012-07-04 | 常州市英中电气有限公司 | Insulation collar ring used for super-high or extra-high voltage transformer and production process thereof |
| CN201608035U (en) * | 2009-05-21 | 2010-10-13 | 常州东芝舒电变压器有限公司 | Locating part for transformer coil electrostatic ring and transformer provided with same |
| CN201741554U (en) * | 2010-07-29 | 2011-02-09 | 南京立业电力变压器有限公司 | Novel transformer |
| CN106653324A (en) * | 2016-12-01 | 2017-05-10 | 保定天威保变电气股份有限公司 | Voltage-regulating winding end part insulating structure for controlling creepage for transformer |
| CN106601472B (en) * | 2016-12-26 | 2018-08-17 | 常州市英中电气有限公司 | It is detached from host insulating materials assembly |
| 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 |
-
2021
- 2021-04-25 CN CN202110447510.3A patent/CN113270244B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208271708U (en) * | 2018-05-19 | 2018-12-21 | 昆明耀龙置信变压器制造有限公司 | A kind of oil-immersed transformer oil channel structure |
| CN211604875U (en) * | 2020-04-27 | 2020-09-29 | 云南变压器电气股份有限公司 | Traction transformer based on natural ester insulating liquid |
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| CN113270244A (en) | 2021-08-17 |
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