CN217086341U - Improved 35KV power transformer high-voltage cake type coil structure - Google Patents
Improved 35KV power transformer high-voltage cake type coil structure Download PDFInfo
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- CN217086341U CN217086341U CN202122555761.1U CN202122555761U CN217086341U CN 217086341 U CN217086341 U CN 217086341U CN 202122555761 U CN202122555761 U CN 202122555761U CN 217086341 U CN217086341 U CN 217086341U
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Abstract
The utility model discloses a modified 35KV power transformer high pressure cake formula coil structure in power transformer technical field. This modified 35KV power transformer high pressure cake formula coil structure high pressure cake formula coil adopts the structure of first normal section-first normal section and pressure regulating section tangle-pressure regulating section-second normal section and pressure regulating section tangle-the normal section of second, high pressure cake formula coil pressure regulating scope is 3X2.5%, is equipped with 8 taps (2 ', 3 ' … … 9 '), the line cake that tap 2 ' place and adopt big oil duct to separate between the line cake that tap 3 ' place, make tap 2's the wire and tap 3's the wire disconnection. The improved high-voltage cake-type coil structure of the 35KV power transformer effectively solves the potential safety hazard of the high-voltage cake-type coil, improves the impulse voltage distribution of the high-voltage cake-type coil, improves the reliability and has higher safety performance.
Description
Technical Field
The utility model relates to a power transformer technical field specifically relates to a modified 35KV power transformer high pressure cake formula coil construction.
Background
The 35KV high-voltage pancake coil with the pressure regulating range of +/-3X 2.5% and bridged at the middle is characterized in that in order to reduce the leakage reactance of the coil and improve the impulse voltage resistance of the coil, the pressure regulating section is usually wound in a tangle mode, in the prior art, the structure commonly adopted by the high-voltage pancake coil is a structure of a normal section, a pressure regulating section and a normal section, wherein 1-72 turns are the number of turns of the pressure regulating section, the maximum gear 2 'and 3' tap is located in a coil (25-48 turns in the pressure regulating section), a lead of the tap 2 'and a lead of the tap 3' are arranged in a staggered mode, only turns are insulated between adjacent turns, and potential safety hazards exist in the coil.
SUMMERY OF THE UTILITY MODEL
The utility model discloses in aiming at solving the biggest shelves 2 'of high-pressure cake formula coil pressure regulating section, 3' tap place line cake, tap 2 'place wire and tap 3' place wire staggered arrangement, there is the technical problem of potential safety hazard in the coil to a modified 35KV power transformer high-pressure cake formula coil structure is provided, the potential safety hazard that the coil exists has effectively been solved.
The utility model provides a problem, the technical scheme who adopts is:
the utility model provides a modified 35KV power transformer high pressure cake formula coil structure, high pressure cake formula coil adopts the structure of first normal section-first normal section and pressure regulating section tangle-pressure regulating section-normal section of second and pressure regulating section tangle-normal section of second, high pressure cake formula coil pressure regulating scope is 3X2.5%, is equipped with 8 tap gears (2 ', 3 ' … … 9 '), the 2 ' place line cake of tap with adopt big oil duct to separate between the 3 ' place line cake of tap.
Adopt above-mentioned technical scheme the utility model discloses, compare with prior art, its outstanding characteristics are:
the utility model provides a modified 35KV power transformer high pressure cake formula coil structure, high pressure cake formula coil adopt first normal section-first normal section entangle with the pressure regulating section-second normal section entangle with the pressure regulating section-the structure of the normal section of second, break off by big oil duct between the wire of maximum gear tap 2 'and the wire of maximum gear tap 3', have effectively solved the potential safety hazard that the coil exists, improve its impulse voltage distribution, improved the reliability, the security performance is higher.
Preferably, the present invention further provides:
each cake of conducting wires of the cake type structure are arranged in a cake-by-cake mode along the axial direction, and an insulating oil duct is arranged between every two adjacent cakes.
Each pie wire of the pie structure is composed of a plurality of wire turns which are connected in series.
Each conducting wire of the cake-shaped structure is wrapped with a turn insulation, and the turn insulation is formed by wrapping three or more layers of insulation paper tapes.
Drawings
FIG. 1 is a schematic diagram of a voltage regulation part of a high-voltage pancake coil structure of a 35KV power transformer in the prior art;
fig. 2 is a schematic diagram of the voltage regulating part of the improved 35KV power transformer high-voltage pancake coil structure of the present invention.
Detailed Description
The invention will be further described with reference to the following examples, which are intended only for better understanding of the invention and therefore do not limit the scope of the invention.
Fig. 1 shows a schematic diagram of a voltage regulating part of a high-voltage pancake coil structure of a 35KV power transformer in the prior art.
Originally, the structure of a normal section a-a voltage regulating section b-a normal section c adopted by a high-voltage cake type coil is specifically shown in fig. 1, and each wire cake comprises a plurality of turns, wherein 1-72 turns are the number of turns of the voltage regulating section. In the wire cake (25-48 turns in the voltage regulating section) where the taps of the maximum gears 2 'and 3' are located, the conducting wires of the taps 2 'and the conducting wires of the taps 3' are arranged in a staggered mode, only turn insulation exists between adjacent turns, and the coil has potential safety hazards.
Fig. 2 is a schematic diagram of the voltage regulating part of the improved 35KV power transformer high-voltage pancake coil structure of the present invention.
An improved 35KV power transformer high-voltage cake-type coil structure is shown in figure 2, in the embodiment, the high-voltage cake-type coil adopts a structure that a first normal section d, a first normal section and a voltage regulating section are intertwined, a voltage regulating section f, a second normal section and a voltage regulating section are intertwined, and a second normal section h is arranged, each cake of wires of the cake-type structure are arranged in a cake-cake manner along the axial direction, and inter-cake insulation is arranged among the wire cakes. The knot e between the first normal section and the voltage regulating section, the knot f between the voltage regulating section and the knot g between the second normal section and the voltage regulating section are wound in a knot type, and the high-voltage pancake coil has the advantages of increasing longitudinal capacitance and improving the distribution of impulse voltage of the high-voltage pancake coil.
Each pie wire of the pie structure is composed of a plurality of wire turns, the wire turns are connected in series, in the example, the number of turns of the first normal section in the entanglement e of the first normal section and the voltage regulating section is 1-12 turns, and the number of turns of the second normal section in the entanglement g of the second normal section and the voltage regulating section is 85-96 turns. The number of turns of the voltage regulating section is 13-84 turns, each conducting wire of the cake-type structure is wrapped with turn insulation, and the turn insulation is formed by wrapping three or more layers of insulation paper tapes.
In the example, in the entanglement g between the first normal section and the voltage regulating section, e, the entanglement e-the voltage regulating section f, and the second normal section and the entanglement g of the voltage regulating section, the high-voltage cake type coil is respectively provided with the taps 2 ' and 3 ' … … 9 ', as shown in fig. 2, wherein the wire cake where the tap 2 ' is located and the wire cake where the tap 3 ' is located at the maximum gear are separated by a large oil duct, so that the lead of the tap 2 ' is disconnected from the lead of the tap 3 ', thereby effectively solving the potential safety hazard of the high-voltage cake type coil, improving the impulse voltage distribution of the high-voltage cake type coil, improving the reliability and having higher safety performance.
The above description is only a preferred and practical embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent variations made by using the contents of the specification and the drawings are included in the scope of the present invention.
Claims (4)
1. The utility model provides a modified 35KV power transformer high pressure cake formula coil structure which characterized in that, high pressure cake formula coil adopts the structure that first normal section-first normal section and pressure regulating section are entangled-pressure regulating section-second normal section and pressure regulating section are entangled-second normal section, high pressure cake formula coil pressure regulating scope is 3X2.5%, is equipped with 8 taps: tap 2 ', tap 3 ', … …, tap 9 '; and the wire cake of the tap 2 'and the wire cake of the tap 3' are separated by a large oil channel, so that the conducting wire of the tap 2 'is disconnected with the conducting wire of the tap 3', and the middle-part cross-over voltage regulation is realized.
2. The improved 35KV power transformer high-voltage pancake coil structure according to claim 1, wherein each pancake of conducting wires of the high-voltage pancake coil structure are arranged in a pancake manner along the axial direction, and an insulating oil channel is arranged between every two pancake of conducting wires.
3. The improved 35KV power transformer high voltage pancake coil configuration of claim 2, wherein each pancake wire of the high voltage pancake coil configuration is comprised of multiple turns connected in series.
4. The improved 35KV power transformer high-voltage pancake coil structure according to claim 3, wherein each conducting wire of the high-voltage pancake coil structure is wrapped with turn insulation, and the turn insulation is formed by wrapping three or more layers of insulating paper tapes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122555761.1U CN217086341U (en) | 2021-10-23 | 2021-10-23 | Improved 35KV power transformer high-voltage cake type coil structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202122555761.1U CN217086341U (en) | 2021-10-23 | 2021-10-23 | Improved 35KV power transformer high-voltage cake type coil structure |
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| CN217086341U true CN217086341U (en) | 2022-07-29 |
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| CN202122555761.1U Active CN217086341U (en) | 2021-10-23 | 2021-10-23 | Improved 35KV power transformer high-voltage cake type coil structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115862994A (en) * | 2022-12-07 | 2023-03-28 | 华中科技大学 | Radially reinforced cake-type structure magnet and forming method thereof |
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2021
- 2021-10-23 CN CN202122555761.1U patent/CN217086341U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115862994A (en) * | 2022-12-07 | 2023-03-28 | 华中科技大学 | Radially reinforced cake-type structure magnet and forming method thereof |
| CN115862994B (en) * | 2022-12-07 | 2023-10-03 | 华中科技大学 | Radially reinforced cake-shaped structural magnet and forming method thereof |
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