CN108447663B - Transformer model - Google Patents
Transformer model Download PDFInfo
- Publication number
- CN108447663B CN108447663B CN201810189152.9A CN201810189152A CN108447663B CN 108447663 B CN108447663 B CN 108447663B CN 201810189152 A CN201810189152 A CN 201810189152A CN 108447663 B CN108447663 B CN 108447663B
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- Prior art keywords
- phase
- voltage coil
- winding
- wire
- 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
- H01F27/2823—Wires
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- 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
- H01F2027/2838—Wires using transposed wires
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
The invention discloses a transformer model, which is a three-phase three-winding transformer, wherein an A-phase high-voltage coil is wound in an aluminum wire entanglement manner, an A-phase voltage coil is continuously wound in an inner screen of a copper wire, and an A-phase low-voltage coil is spirally wound by a paper-covered copper wire; the phase B high-voltage coil is continuously wound by adopting a combined wire inner screen, the phase B pressing coil is wound by adopting a paper-clad aluminum wire in a knotting manner, and the phase B low-voltage coil is wound by adopting a self-adhesive transposition wire double helix manner; the C-phase high-voltage coil adopts a mode of leading in from the middle of a combined conducting wire in a intertwined mode, the C-phase voltage coil adopts a mode of leading in from the continuous end of the inner screen of the self-adhesive transposed conducting wire in a mode, and the C-phase low-voltage coil adopts four-spiral winding of the transposed conducting wire. The invention adopts different coil materials and winding forms of the coil, can simulate the coil characteristics of the transformer in different production periods, and only needs one transformer model when testing the short-circuit resistance of the transformer in different production periods, thereby reducing the workload of the transformer test and simplifying the test process.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a transformer model.
Background
The power transformer is a hub for transmitting and distributing electric energy, is a core element of a power network, and the reliable operation of the power transformer is not only related to the electric energy quality of a large number of users, but also related to the safety degree of the whole system. The reliability of a power transformer is determined by its health, not only by the design, manufacture and construction materials, but also is closely related to the maintenance and repair.
The maintenance of the power transformer includes testing the short-circuit resistance of the transformer, and because the manufacturing times of the transformers used in the power grid are different, the transformers in each period have differences in coil material selection, coil winding mode, insulation structure and the like, and if the short-circuit resistance of the transformers in different periods is to be tested, the testing objects need to be continuously replaced, namely, a plurality of transformers in different manufacturing times are respectively tested, so that the workload is large.
Therefore, how to simplify the work of testing the short-circuit resistance capability of a transformer is the technical problem that those skilled in the art are to be used for.
Disclosure of Invention
The invention provides a transformer model, which can simulate transformers in different periods in a wire form so as to solve the problem of large workload of testing short-circuit resistance of the transformers in the prior art.
The invention provides a transformer model, which is a three-phase three-winding transformer, comprising: the phase-A winding comprises a phase-A high-voltage coil, a phase-A medium-voltage coil and a phase-A low-voltage coil, the phase-B winding comprises a phase-B high-voltage coil, a phase-B medium-voltage coil and a phase-B low-voltage coil, the phase-C winding comprises a phase-C high-voltage coil, a phase-C medium-voltage coil and a phase-C low-voltage coil,
the phase A high-voltage coil is wound in an aluminum wire entanglement mode, the phase A pressing coil is wound in a copper wire inner screen continuous mode, and the phase A low-voltage coil is wound in a paper-covered copper wire spiral mode;
the phase B high-voltage coil is continuously wound by adopting a combined wire inner screen, the phase B pressing coil is wound by adopting a paper-clad aluminum wire in a intertwining manner, and the phase B low-voltage coil is wound by adopting a self-adhesive transposition wire in a double-spiral manner;
the C-phase high-voltage coil adopts a mode of a combined conducting wire intertwining middle incoming line, the C-phase voltage coil adopts a mode of a self-adhesive transposed conducting wire inner screen continuous end incoming line, and the C-phase low-voltage coil adopts transposed conducting wire four-spiral winding.
According to one embodiment of the invention, in the transposed conductor four-spiral type, the conductors are connected by adopting a mode of connecting a plurality of turns of wire cake conductors.
According to one embodiment of the invention, in the transposed conductor four-spiral type, a single-turn wire-cake conductor connection mode is adopted between conductors.
According to one embodiment of the invention, the A-phase winding and the B-phase winding are processed by constant voltage drying.
According to one embodiment of the invention, the A-phase winding and the C-phase winding are provided with a hard paper sleeve, and the B-phase winding is free of a hard paper sleeve.
The invention provides a transformer model which comprises an A-phase winding, a B-phase winding and a C-phase winding, wherein the A-phase winding comprises an A-phase high-voltage coil, an A-phase medium-voltage coil and an A-phase low-voltage coil; the phase B high-voltage coil is continuously wound by adopting a combined wire inner screen, the phase B pressing coil is wound by adopting a paper-clad aluminum wire in a knotting manner, and the phase B low-voltage coil is wound by adopting a self-adhesive transposition wire double helix manner; the C-phase high-voltage coil adopts a mode of leading in from the middle of a combined conducting wire in a intertwined mode, the C-phase voltage coil adopts a mode of leading in from the continuous end of the inner screen of the self-adhesive transposed conducting wire in a mode, and the C-phase low-voltage coil adopts four-spiral winding of the transposed conducting wire. The invention can simulate the coil characteristics of the transformer in different production periods by adopting different coil materials and winding forms of the coil, only needs one transformer model when testing the short-circuit resistance of the transformer in different production periods, can effectively reduce the workload of the transformer test and simplify the test process.
Drawings
Fig. 1 is a schematic structural diagram of a three-phase three-winding transformer according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a connection manner of a first even-number-turn wire cake of a transformer model according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a connection manner of a second even-number-turn wire cake of a transformer model according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a connection manner of odd-numbered turn-cake conductors of a transformer model according to an embodiment of the present invention.
In fig. 1, reference numerals denote:
1-A phase winding, 2-B phase winding, 3-C phase winding, 4-clamping piece, 5-cushion block, 6-base and 7-hanging ring;
the numbers in fig. 2-4 represent the number of coil segments.
Detailed Description
The invention is further illustrated by the following figures and examples.
Referring to fig. 1, a schematic structure of a three-phase three-winding transformer provided by an embodiment of the present invention includes an a-phase winding 1, a B-phase winding 2, a C-phase winding 3, a clip 4 for fixing the windings, a spacer 5 for insulating and isolating the windings from a base 6, and a lifting ring 7 for lifting the transformer. The A-phase winding 1 comprises an A-phase high-voltage coil, an A-phase medium-voltage coil and an A-phase low-voltage coil, the B-phase winding 2 comprises a B-phase high-voltage coil, a B-phase medium-voltage coil and a B-phase low-voltage coil, and the C-phase winding 3 comprises a C-phase high-voltage coil, a C-phase medium-voltage coil and a C-phase low-voltage coil.
In order to enable the transformer model provided by the embodiment of the invention to simulate the characteristics of transformers in different production periods, the phase A high-voltage coil is wound in an aluminum wire entanglement mode, the phase A voltage coil is continuously wound in a copper wire inner screen mode, and the phase A low-voltage coil is spirally wound by a paper-covered copper wire.
The B-phase high-voltage coil is continuously wound by adopting a combined wire inner screen, the B-phase voltage coil is wound by adopting a paper-clad aluminum wire entanglement type, and the B-phase low-voltage coil is wound by adopting a self-adhesive transposition wire double helix type.
The C-phase high-voltage coil adopts a mode of leading in from the middle of a combined conducting wire in a intertwined mode, the C-phase voltage coil adopts a mode of leading in from the continuous end of the inner screen of the self-adhesive transposed conducting wire in a mode, and the C-phase low-voltage coil adopts four-spiral winding of the transposed conducting wire.
In the transposed conductor four-spiral type of the C-phase low-voltage coil, the conductors may be connected by using a connection manner of even-number-turns of wire-cake conductors, and the specific arrangement form is shown in fig. 2 and 3.
The wires can also be connected by adopting a single-turn wire-cake wire, and the specific arrangement form is shown in fig. 4. The numbers in fig. 2-4 represent the number of coil segments.
In summary, the transformer model provided by the invention can simulate the coil characteristics of the transformer in different production periods by adopting different coil materials and winding forms of the coil, and only one transformer model is needed when testing the short-circuit resistance of the transformer in different production periods, so that the workload of transformer testing can be effectively reduced, and the testing process is simplified.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (5)
1. A transformer model being a three-phase three-winding transformer comprising: the phase-A winding comprises a phase-A winding (1), a phase-B winding (2) and a phase-C winding (3), wherein the phase-A winding (1) comprises a phase-A high-voltage coil, a phase-A medium-voltage coil and a phase-A low-voltage coil, the phase-B winding (2) comprises a phase-B high-voltage coil, a phase-B medium-voltage coil and a phase-B low-voltage coil, and the phase-C winding (3) comprises a phase-C high-voltage coil, a phase-C medium-voltage coil and a phase-C low-voltage coil,
the phase A high-voltage coil is wound in an aluminum wire entanglement mode, the phase A pressing coil is wound in a copper wire inner screen continuous mode, and the phase A low-voltage coil is wound in a paper-covered copper wire spiral mode;
the phase B high-voltage coil is continuously wound by adopting a combined wire inner screen, the phase B pressing coil is wound by adopting a paper-clad aluminum wire in a intertwining manner, and the phase B low-voltage coil is wound by adopting a self-adhesive transposition wire in a double-spiral manner;
the C-phase high-voltage coil adopts a mode of a combined conducting wire intertwining middle incoming line, the C-phase voltage coil adopts a mode of a self-adhesive transposed conducting wire inner screen continuous end incoming line, and the C-phase low-voltage coil adopts transposed conducting wire four-spiral winding.
2. The transformer model of claim 1, wherein in the transposed conductor four-spiral type, the conductors are connected by using a mode of connecting a plurality of turns of wire-cake conductors.
3. The transformer model of claim 1, wherein in the transposed conductor quadruple-helix type, the conductors are connected by using a single-turn wire-cake conductor.
4. Transformer model according to claim 1, characterized in that the A-phase winding (1) and the B-phase winding (2) are dried with constant voltage.
5. Transformer model according to claim 1, characterized in that the A-phase winding (1) and the C-phase winding (3) are provided with a stiff paper sleeve and the B-phase winding (2) is free of a stiff paper sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810189152.9A CN108447663B (en) | 2018-03-08 | 2018-03-08 | Transformer model |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810189152.9A CN108447663B (en) | 2018-03-08 | 2018-03-08 | Transformer model |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108447663A CN108447663A (en) | 2018-08-24 |
| CN108447663B true CN108447663B (en) | 2021-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810189152.9A Active CN108447663B (en) | 2018-03-08 | 2018-03-08 | Transformer model |
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| CN (1) | CN108447663B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109613387B (en) * | 2018-11-22 | 2021-05-25 | 广西电网有限责任公司电力科学研究院 | Winding intertwist short circuit simulator |
| CN112989600A (en) * | 2021-03-11 | 2021-06-18 | 云南电网有限责任公司电力科学研究院 | Model for rapidly calculating short-circuit resistance of transformer and establishment method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106934166A (en) * | 2017-03-20 | 2017-07-07 | 广东电网有限责任公司电力科学研究院 | A kind of equivalent Short-way model construction method of EHV transformer and device |
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2018
- 2018-03-08 CN CN201810189152.9A patent/CN108447663B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106934166A (en) * | 2017-03-20 | 2017-07-07 | 广东电网有限责任公司电力科学研究院 | A kind of equivalent Short-way model construction method of EHV transformer and device |
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| CN108447663A (en) | 2018-08-24 |
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