CN210865853U - Transformer voltage regulating winding structure - Google Patents
Transformer voltage regulating winding structure Download PDFInfo
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- CN210865853U CN210865853U CN201922335408.5U CN201922335408U CN210865853U CN 210865853 U CN210865853 U CN 210865853U CN 201922335408 U CN201922335408 U CN 201922335408U CN 210865853 U CN210865853 U CN 210865853U
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Abstract
The utility model relates to a transformer voltage regulation winding structure belongs to transformer technical field. The technical scheme is as follows: the voltage-regulating outer winding (5) is formed by winding N turns to the bottom from the upper end of the outer layer of the voltage-regulating winding (1) along the axial direction together with a voltage-regulating bias excitation winding section (6) and a voltage-regulating common winding section (7), wherein the outlet wire of the voltage-regulating bias excitation winding section (6) is led out from the bottom of the voltage-regulating winding (1), the voltage-regulating common winding section (7) is transposed from the bottom of the voltage-regulating winding (1) to the inner layer of the voltage-regulating winding (1) and continues to wind N turns to the upper end of the voltage-regulating winding (1) along the axial direction upwards to form a voltage-regulating inner winding (4), and the outlet wire of the voltage-regulating common winding section (7. The utility model discloses an arrange different winding combinations in the ectonexine of pressure regulating winding, solved the uneven phenomenon of ampere turn distribution that pressure regulating bias excitation winding leads to when the number of turns is too much, improved the fail safe nature of transformer.
Description
Technical Field
The utility model relates to a transformer voltage regulation winding structure belongs to transformer technical field.
Background
In order to realize multi-stage large-range on-load voltage regulation of a large-scale power transformer, reduce the number of taps and tapping leads of a voltage regulating winding and the structural complexity of the voltage regulating tapping leads so as to improve the safety and reliability of products, a voltage regulating bias excitation winding is often added on each phase post of the transformer. Therefore, the voltage regulating line segment can be halved under the same voltage regulating stage number. The number of turns of the voltage-regulating bias excitation winding is half of that of each voltage-regulating line segment, and the number of turns is small, and the voltage-regulating bias excitation winding is usually placed at the end part of the voltage-regulating winding. When the voltage of each level of voltage regulation is higher, the number of turns is increased, if the structure is still adopted, the voltage-regulating bias excitation winding section occupies too much winding reactance height, the uneven distribution of winding ampere turns is inevitably caused, the winding short-circuit electrodynamic force is increased, the transverse eddy current loss in a winding conductor is increased, and further the short-circuit resistance of a product is reduced and the bad phenomenon of local overheating of the end part of the winding is caused.
Disclosure of Invention
The utility model aims at providing a transformer voltage regulation winding structure arranges different winding combinations through the inlayer at the voltage regulation winding, has solved the uneven phenomenon of ampere turn distribution that voltage regulation bias excitation winding leads to when the number of turns is too much, has improved the fail safe nature of transformer, has solved the above-mentioned problem that exists effectively among the background art.
The technical scheme of the utility model is that: a voltage regulating winding structure of a transformer comprises a voltage regulating winding, other windings and an iron core, wherein the voltage regulating winding and the other windings are concentric with the center of the iron core in the circumferential direction, are arranged on the periphery of the iron core along the radial direction, and have the same center height in the axial direction; the voltage regulating winding is of a double-layer U-shaped spiral winding structure and consists of a voltage regulating inner winding and a voltage regulating outer winding; the voltage regulating outer winding is formed by winding N turns to the bottom of a voltage regulating bias excitation winding section and a voltage regulating common winding section together from the upper end of the outer layer of the voltage regulating winding along the axial direction, wherein an outlet wire of the voltage regulating bias excitation winding section is led out from the bottom of the voltage regulating winding, the voltage regulating common winding section is transposed from the bottom of the voltage regulating winding to an inner layer of the voltage regulating winding and continues to wind the N turns to the upper end of the voltage regulating winding along the axial direction upwards to form a voltage regulating inner winding, and an outlet wire of the voltage regulating common winding section is led.
And the voltage regulating inner-layer winding and the voltage regulating outer-layer winding are provided with insulating cushion blocks, and the thickness of the insulating cushion blocks is respectively matched with the reactance heights of the voltage regulating inner-layer winding and the voltage regulating outer-layer winding.
The other windings refer to the rest windings except the voltage regulating winding.
The utility model has the advantages that: different winding combinations are arranged on the inner layer and the outer layer of the voltage regulating winding, so that the problem of uneven ampere turn distribution caused by excessive turns of the voltage regulating bias excitation winding is solved, and the safety and reliability of the transformer are improved.
Drawings
Fig. 1 is a structural layout diagram of the present invention;
FIG. 2 is a sectional view showing the arrangement of the voltage-regulating bias field winding section and the voltage-regulating normal winding section of the present invention;
in the figure: the transformer comprises a voltage regulating winding 1, other windings 2, an iron core 3, a voltage regulating inner winding 4, a voltage regulating outer winding 5, a voltage regulating bias excitation winding section 6 and a voltage regulating common winding section 7.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and embodiments.
A voltage regulating winding structure of a transformer comprises a voltage regulating winding 1, other windings 2 and an iron core 3, wherein the voltage regulating winding 1 and the other windings 2 are concentric with the center of the iron core 3 in the circumferential direction, are arranged on the periphery of the iron core 3 along the radial direction, and have the same center height in the axial direction; the voltage regulating winding 1 is of a double-layer U-shaped spiral winding structure and consists of a voltage regulating inner winding 4 and a voltage regulating outer winding 5; the voltage-regulating outer winding 5 is formed by winding N turns downwards to the bottom from the upper end of the outer layer of the voltage-regulating winding 1 along the axial direction together with a voltage-regulating bias excitation winding section 6 and a voltage-regulating common winding section 7, wherein the outlet wire of the voltage-regulating bias excitation winding section 6 is led out from the bottom end of the voltage-regulating winding 1, the voltage-regulating common winding section 7 is transposed at the bottom of the voltage-regulating winding 1 to the inner layer of the voltage-regulating winding 1 and continuously winds the N turns upwards to the upper end of the voltage-regulating winding 1 along the axial direction to form a voltage-regulating inner winding 4, and the outlet wire of the voltage-regulating common.
And the voltage-regulating inner-layer winding 4 and the voltage-regulating outer-layer winding 5 are provided with insulating cushion blocks, and the thickness of the insulating cushion blocks is respectively matched with the reactance heights of the voltage-regulating inner-layer winding 4 and the voltage-regulating outer-layer winding 5.
In practical applications, the core may be selected to have a single-phase or three-phase configuration, depending on the transformer parameters, as shown in fig. 1. All windings on the iron core 3, namely the voltage regulating winding 1 and other windings 2 are concentric with the center of the iron core 3 in the circumferential direction, and are randomly arranged in the radial direction according to requirements, the center height in the axial direction is consistent, and the reactance height is approximate. The voltage regulating winding 1 is a double-layer U-shaped spiral winding structure.
Referring to fig. 2, the voltage regulating winding 1 is divided into an inner layer and an outer layer, namely, a voltage regulating inner winding 4 and a voltage regulating outer winding 5. The number of turns of the voltage-regulating bias excitation winding section 6 is equal to the number of turns for generating rated level voltage Us, meanwhile, the number of turns of each level of the voltage-regulating common winding section 7 is equal to the number of turns for generating double level voltage 2Us, and the voltage-regulating bias excitation winding section 6 and the voltage-regulating common winding section 7 both adopt spiral structures. On the outer layer of the voltage regulating winding, the voltage regulating bias excitation winding section 6 and the voltage regulating common winding section 7 are wound together along the axial direction from the upper end to the lower part of the voltage regulating winding, the outgoing line of the voltage regulating bias excitation winding section 6 is led out outwards, and the voltage regulating common winding section 7 is transposed to the voltage regulating inner layer to continue to wind N turns along the axial direction to the upper end of the winding and then is led out.
In order to ensure the consistent reactance heights of the inner and outer layers of windings, the inner and outer layers respectively adopt insulating cushion blocks with different thicknesses. Therefore, the voltage-regulating bias excitation winding section 6 and the voltage-regulating common winding section 7 have consistent reactance heights in the axial direction, and the ampere-turn distribution of the voltage-regulating winding 1 and other windings 2 in the height direction is always uniform no matter whether the voltage-regulating bias excitation winding section 6 has current or not and whether each level or multiple poles of the voltage-regulating common winding section 7 have current or not, so that the safety and reliability of product operation are improved.
The utility model discloses a voltage regulating winding is two-layer inside and outside, and the voltage regulating is partly excited the excitation winding section and is constituted the outer winding of voltage regulating with the same coiling of ordinary voltage regulating winding section, is qualified for the next round of competitions in voltage regulating winding bottom voltage regulating excitation winding section partially, and the ordinary winding end of voltage regulating then replaces and continue coiling to the winding upper end and draw forth to the voltage regulating winding inlayer. Therefore, the requirement that the number of turns of the voltage-regulating bias excitation winding is one half of that of each stage of voltage-regulating line segment is met, and the phenomenon of uneven ampere turn distribution caused by biasing the voltage-regulating bias excitation winding at one end of the winding is avoided.
Claims (2)
1. A transformer voltage regulation winding structure is characterized in that: the transformer comprises a voltage regulating winding (1), other windings (2) and an iron core (3), wherein the voltage regulating winding (1) and the other windings (2) are concentric with the center of the iron core (3) in the circumferential direction, are arranged on the periphery of the iron core (3) along the radial direction, and have the same center height in the axial direction; the voltage regulating winding (1) is of a double-layer U-shaped spiral winding structure and consists of a voltage regulating inner winding (4) and a voltage regulating outer winding (5); the voltage-regulating outer winding (5) is formed by winding N turns to the bottom of the voltage-regulating bias excitation winding section (6) and a voltage-regulating common winding section (7) together from the upper end of the outer layer of the voltage-regulating winding (1) along the axial direction, wherein the outlet wire of the voltage-regulating bias excitation winding section (6) is led out from the bottom of the voltage-regulating winding (1), the voltage-regulating common winding section (7) is transposed from the bottom of the voltage-regulating winding (1) to the inner layer of the voltage-regulating winding (1) and continues to wind the N turns to the upper end of the voltage-regulating winding (1) along the axial direction upwards to form a voltage-regulating inner winding (4), and the outlet wire of the voltage-regulating common winding section.
2. The transformer tap winding structure of claim 1, wherein: and the voltage regulating inner-layer winding (4) and the voltage regulating outer-layer winding (5) are provided with insulating cushion blocks, and the thickness of the insulating cushion blocks is respectively matched with the reactance heights of the voltage regulating inner-layer winding (4) and the voltage regulating outer-layer winding (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922335408.5U CN210865853U (en) | 2019-12-24 | 2019-12-24 | Transformer voltage regulating winding structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922335408.5U CN210865853U (en) | 2019-12-24 | 2019-12-24 | Transformer voltage regulating winding structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210865853U true CN210865853U (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922335408.5U Active CN210865853U (en) | 2019-12-24 | 2019-12-24 | Transformer voltage regulating winding structure |
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|---|---|
| CN (1) | CN210865853U (en) |
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2019
- 2019-12-24 CN CN201922335408.5U patent/CN210865853U/en active Active
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