CN219738726U - Be applied to voltage regulating coil structure of reactance type on-load voltage regulating transformer - Google Patents
Be applied to voltage regulating coil structure of reactance type on-load voltage regulating transformer Download PDFInfo
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- CN219738726U CN219738726U CN202320330445.0U CN202320330445U CN219738726U CN 219738726 U CN219738726 U CN 219738726U CN 202320330445 U CN202320330445 U CN 202320330445U CN 219738726 U CN219738726 U CN 219738726U
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- 230000007935 neutral effect Effects 0.000 claims abstract description 6
- 229920000728 polyester Polymers 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 230000003828 downregulation Effects 0.000 claims description 2
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- 230000033228 biological regulation Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000004804 winding Methods 0.000 description 19
- 238000010586 diagram Methods 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
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- 229910052742 iron Inorganic materials 0.000 description 2
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- 238000003475 lamination Methods 0.000 description 1
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Abstract
The utility model belongs to the field of transformer manufacturing, and relates to a voltage regulating coil structure applied to a reactance type on-load voltage regulating transformer, a high-voltage regulating coil and a medium-voltage regulating coil are wound on the same core column, an end coil with the same inner diameter as the inner diameter and the outer diameter of the coil cake is arranged between the high-voltage regulating coil and the medium-voltage regulating coil, the high-voltage regulating coil is two high-voltage regulating coils which are connected in parallel up and down, neutral points of the two high-voltage regulating coils are positively and negatively regulated, and no load voltage regulation is realized; the medium voltage regulating coils are two medium voltage regulating coils which are connected in parallel up and down, each medium voltage regulating coil is provided with nine tapping sections respectively, each tapping section is connected in series end to end, and the two tapping wires at the head and the tail are led out together and bound together; wrapping a first layer of corner rings and a second layer of corner rings on a first cake wire cake of the medium-voltage regulating coil, which is adjacent to the high-voltage regulating coil, and arranging a cushion block between the first layer of corner rings and the second layer of corner rings. The utility model makes the transformer compact in structure and simultaneously facilitates the outgoing lines of the high-voltage regulating coil and the medium-voltage regulating coil.
Description
Technical Field
The utility model belongs to the technical field of transformer manufacturing, and particularly relates to a voltage regulating coil structure applied to a reactance type on-load voltage regulating transformer.
Background
A reactive on-load tap changer is a transformer product widely used in america, and a reactive switch is generally used for on-load tap adjustment of medium voltage or low voltage. The reactance type on-load voltage regulating switch can solve the problems of large connection range and the like when the transformer has low voltage and large capacity.
The existing reactance type on-load voltage regulating transformer is characterized in that a common voltage regulating mode generally places a voltage regulating coil on the outer side of a corresponding voltage class coil, and winding arrangement modes are as follows from inside to outside in sequence: iron core-low voltage-medium voltage regulation-high voltage. However, when the capacity of the transformer is large and the high-voltage winding needs to be regulated, the complexity of the winding arrangement structure is improved, and the structure feasibility is problematic. The design is carried out according to the existing structure, and the winding arrangement mode is as follows from inside to outside in sequence: iron core-low voltage-medium voltage-high voltage-regulating. The arrangement form causes the integral insulation structure of the transformer to be complex, the manufacturability of the outgoing line of the inner side winding is poor, and the outgoing line of the inner side voltage regulating coil has no wiring channel.
Disclosure of Invention
In order to solve the technical problems, the utility model provides a voltage regulating coil structure applied to a reactance type on-load voltage regulating transformer. The technical scheme adopted by the utility model for solving the technical problems is as follows:
the utility model provides a be applied to reactance type on-load voltage regulating transformer's voltage regulating coil structure, includes high voltage regulating coil and middling pressure voltage regulating coil, high voltage regulating coil and middling pressure voltage regulating coil coiling on same stem, high voltage regulating coil is the same with middling pressure voltage regulating coil's inside and outside footpath, install the same end circle of inside and outside footpath with the cake between high voltage regulating coil and the middling pressure voltage regulating coil, high voltage regulating coil be two high voltage regulating coils of upper and lower parallelly connected, two high voltage regulating coils neutral point positive and negative regulation, no on-load voltage regulating; the medium voltage regulating coils are two medium voltage regulating coils which are connected in parallel up and down, each medium voltage regulating coil is provided with nine tapping sections respectively, each tapping section is connected in series end to end, and the two tapping wires at the head and the tail are led out together and bound together; wrapping a first layer of corner ring and a second layer of corner ring on a first cake wire cake of the medium-voltage regulating coil, which is adjacent to the high-voltage regulating coil, and dividing an oil gap between the first layer of corner ring and the second layer of corner ring by using a cushion block.
Preferably, the end ring is a laminated end ring or an end ring in the form of a paper ring bonding pad.
Preferably, the polyester shrink tube is used for binding the head tapping line and the tail tapping line of each turn of the medium-voltage regulating coil together, and 3mm insulating paper is bound at the bending position of the tapping line.
Preferably, all outgoing lines of the coil are staggered in the rail by taking the auxiliary stay as the center.
Preferably, the high voltage regulating coil and the medium voltage regulating coil adopt a single spiral structure.
Preferably, from the iron core, from inside to outside, the following steps are sequentially adopted: the high-voltage and medium-voltage regulating device comprises a low-voltage coil, a medium-voltage coil, a high-voltage coil and a regulating coil, wherein the regulating coil comprises a high-voltage regulating coil and a medium-voltage regulating coil, and the high-voltage regulating coil and the medium-voltage regulating coil are wound on the outer side of the high-voltage coil at the same time.
The utility model has the following advantages:
(1) The high-voltage regulating coil and the medium-voltage regulating coil are wound on the same core column and are placed outside the high-voltage coil at the same time, so that the transformer is more compact in structure and is convenient for outgoing lines of the high-voltage regulating coil and the medium-voltage regulating coil at the same time.
(2) The medium-voltage regulating coil is combined with the reactor voltage regulating switch, so that a large tapping range in the case of low voltage and large capacity can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present utility model, 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 is apparent that the drawings in the following description are specific embodiments of the utility model and that other drawings within the scope of the utility model may be obtained from these drawings by those skilled in the art without inventive effort.
FIG. 1 is a transformer winding arrangement diagram of an embodiment of the present utility model;
FIG. 2 is a schematic diagram of the middle insulation of the high voltage regulator coil and the medium voltage regulator coil according to an embodiment of the present utility model;
FIG. 3 is a schematic view of a tap wire tie according to an embodiment of the utility model;
FIG. 4 is a schematic diagram of a high voltage regulator coil connection in accordance with an embodiment of the present utility model;
fig. 5 is a schematic diagram of a medium voltage regulator coil connection according to an embodiment of the present utility model.
In the figure, 11 is a low-voltage coil, 12 is a medium-voltage coil, 13 is a high-voltage coil, 14 is a high-voltage-regulating coil, 15 is a medium-voltage-regulating coil, and 16 is an iron core.
The high-voltage-regulating coil first cake wire cake 21, the cushion block 22, the medium-voltage-regulating coil first cake wire cake 23, the first-layer corner ring 24, the second-layer corner ring 25, the inner diameter side of the coil 26, the medium-voltage-regulating split wire 27 and the polyester shrink tube 28.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and complete in conjunction with the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the present utility model.
As shown in fig. 1, in the transformer winding arrangement according to the embodiment of the present utility model, from the core 16, from inside to outside, there are: the low-voltage coil 11, the medium-voltage coil 12, the high-voltage coil 13 and the voltage-regulating coil, wherein the voltage-regulating coil comprises a high-voltage-regulating coil 14 and a medium-voltage-regulating coil 15. The high-voltage regulating coil 14 and the medium-voltage regulating coil 15 have the same inner and outer diameters and are wound on the outer side of the high-voltage coil 13; fig. 2 is a schematic diagram illustrating middle insulation between a high voltage regulator coil and a medium voltage regulator coil according to an embodiment of the present utility model; fig. 3 is a schematic view of a tap wire harness according to an embodiment of the present utility model. The utility model provides a be applied to reactance type on-load voltage regulating transformer's voltage regulating coil structure, includes high voltage regulating coil 14 and middling pressure voltage regulating coil 15, high voltage regulating coil 14 and middling pressure voltage regulating coil 15 coiling on same stem, install between high voltage regulating coil 14 and the middling pressure voltage regulating coil 15 and set up the end circle the same with the inside and outside footpath of coil cake, the end circle is the end circle of lamination end circle or paper circle stick-pad form, sets up the end circle and can pack insulating distance to there is sufficient insulating distance between the voltage regulating coil. The high-voltage regulating coils 14 are two high-voltage regulating coils which are connected in parallel up and down, neutral points of the two high-voltage regulating coils are positively and negatively regulated, and no load voltage is regulated. The high-voltage regulating coil is divided into an upper winding and a lower winding which are connected in parallel, the voltage regulating and the flow distribution are carried out after the parallel connection, the current carrying wire diameters of the windings are reduced compared with the prior art, the upper winding and the lower winding are symmetrical, the magnetic leakage distribution is uniform, and the short circuit resistance is strong.
The medium voltage regulating coils 15 are two medium voltage regulating coils which are connected in parallel up and down, each medium voltage regulating coil is provided with nine tapping sections respectively, each tapping section is connected in series end to end, and the two tapping wires at the end are led out together and bound together. In the figure 26 is the inner diameter side of the voltage regulating coil. The medium-voltage regulating coil is divided into an upper winding and a lower winding which are connected in parallel, the voltage regulating and the flow distribution are carried out after the parallel connection, the current carrying wire diameters of the windings are reduced compared with the prior art, the upper winding and the lower winding are symmetrical, the magnetic leakage distribution is uniform, and the short circuit resistance is strong. The high voltage and medium voltage are arranged in the same column, the insulation structure is optimized, the complexity is reduced, and the lead-out wires are more facilitated.
The middle of the high-voltage regulating coil 14 and the middle-voltage regulating coil 15 is provided with an end coil for filling an insulation distance, and a first layer of corner rings 24 and a second layer of corner rings 25 are wrapped on a first cake wire cake 23 of the middle-voltage regulating coil 15 adjacent to the high-voltage regulating coil 14, so that the purpose of insulation reinforcement is realized at square and sharp corners possibly occurring at the end part of the first cake wire cake 23 of the middle-voltage regulating coil; the spacer 22 is used to divide the oil gap between the first layer angle ring 24 and the second layer angle ring 25. To prevent the condition that the field intensity concentrated discharge occurs in the case of lightning impulse or transient overvoltage of the coils with two different voltage levels. The polyester shrink tube 28 is used for binding the head and tail tapping lines 27 of each turn of the medium-voltage regulating coil 15 together, 3mm insulating paper is bound at the bending position of the tapping lines 27, and the tapping lines 27 are bound and fixed with the upper wire cake and the lower wire cake.
In order to facilitate the connection of the coil with the voltage regulating switch after winding up and down, all outgoing lines of the coil are staggered in the rail by taking the auxiliary stay as the center.
In the embodiment of the utility model, the high-voltage regulating coil 14 and the medium-voltage regulating coil 15 adopt a single-spiral structure, the spiral coil cake winding process is simple, one-turn coil is wound, and compared with a multi-spiral and continuous coil, the single-spiral structure coil does not need to be transposed, and the coil inter-turn heat dissipation effect is good.
In the embodiment of the utility model, the transformer has a transformation ratio of 230+/-2×2.5%/69+/-16×0.625%/13.8kV by adopting the voltage regulating coil structure.
As shown in fig. 3, a schematic diagram of the connection of the high voltage regulating coil according to an embodiment of the present utility model is shown: wherein H1 and H1k are the head and the tail of the first phase of the high-voltage coil respectively, H2 and H2k are the head and the tail of the second phase of the high-voltage coil respectively, H3 and H3k are the head and the tail of the third phase of the high-voltage coil respectively, and the three phases of the high-voltage coil are connected in a star mode, namely, the tail ends (k-line ends) of the three-phase high-voltage coil are connected together to form a neutral line H0. The high-voltage coils of each phase are respectively connected with the voltage-regulating coils in series, and when the switch k dials different gears of the voltage-regulating coils 1, 2 and 3, the number of turns of the voltage-regulating coils connected in series in the high-voltage coils is different, so that the step regulation of voltage is realized. As can be seen from the schematic diagram, each high voltage regulator coil 14 has two tapping sections, so that a ±2 tapping is achieved.
As shown in fig. 4, a schematic diagram of the medium voltage regulating coil connection according to an embodiment of the present utility model is shown: wherein X1 and X1k are the head and the tail of the first phase of the medium-voltage coil, X2 and X2k are the head and the tail of the second phase of the medium-voltage coil, X3 and X3k are the head and the tail of the third phase of the medium-voltage coil, and the three phases of the medium-voltage coil are connected in a star mode, namely the tail heads (k line ends) of the three-phase medium-voltage coil are connected together to form a neutral line X0. The medium voltage coils of each phase are respectively connected with the voltage regulating coils in series, when the switch k dials different gears of the voltage regulating coils 4-11, the number of turns of the voltage regulating coils connected in series in the medium voltage coils is different, and therefore step regulation of voltage is achieved. The medium voltage regulating coil 15 is designed according to the working principle of the reactance type on-load switch and is provided with nine tapping sections, so that +/-16 tapping is realized.
In the embodiments of the present utility model, technical features that are not described in detail are all existing technologies or conventional technical means, and are not described herein.
Finally, it should be noted that: the above examples are only specific embodiments of the present utility model, and are not intended to limit the scope of the present utility model. Those skilled in the art will appreciate that: any person skilled in the art may modify or easily conceive of changes to the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the 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 technical solutions of the embodiments of the present utility model, and are intended to be included in the scope of the present utility model.
Claims (6)
1. The utility model provides a be applied to voltage regulating coil structure of reactance type on-load voltage regulating transformer, its characterized in that includes high voltage regulating coil (14) and middling pressure regulating coil (15), high voltage regulating coil (14) and middling pressure regulating coil (15) coiling on same stem, high voltage regulating coil (14) are the same with the inside and outside footpath of middling pressure regulating coil (15), install and set up the same end coil with the inside and outside footpath of cake between high voltage regulating coil (14) and middling pressure regulating coil (15), high voltage regulating coil (14) be two high voltage regulating coils of upper and lower parallel, two high voltage regulating coils neutral point positive and negative regulation, no load voltage regulating; the medium voltage regulating coils (15) are two medium voltage regulating coils which are connected in parallel up and down, each medium voltage regulating coil is provided with nine tapping sections, each tapping section is connected in series end to end, and the two tapping wires at the end are led out together and bound together; wrapping a first layer of corner rings (24) and a second layer of corner rings (25) on a first cake wire cake (23) of the medium-voltage regulating coil (15) adjacent to the high-voltage regulating coil (14), and dividing an oil gap between the first layer of corner rings (24) and the second layer of corner rings (25) by using a cushion block (22).
2. The voltage regulating coil structure for a reactance type on-load voltage regulating transformer of claim 1, wherein said end coil is in the form of a laminated end coil or a paper coil stick-pad.
3. The voltage regulating coil structure applied to the reactance type on-load voltage regulating transformer according to claim 2, characterized in that a polyester shrink tube (28) is used for binding the first tapping line and the last tapping line (27) of each turn of the medium voltage regulating coil (15) together, and 3mm insulating paper is bound at the bending position of the tapping line (27).
4. A voltage regulating coil structure for use in a reactive on-load voltage regulating transformer as defined in claim 3, wherein all outgoing lines of the coil are staggered in the bars about the auxiliary stay.
5. The voltage regulating coil structure for a reactance type on-load voltage regulating transformer of claim 4, characterized in that said high voltage regulating coil (14) and said medium voltage regulating coil (15) are of single spiral structure.
6. The voltage regulating coil structure for use in a reactive on-load voltage regulating transformer according to claim 1, characterized by the following steps, from the core (16), in order from inside to outside: the high-voltage power supply comprises a low-voltage coil (11), a medium-voltage coil (12), a high-voltage coil (13) and a voltage regulating coil, wherein the voltage regulating coil comprises a high-voltage regulating coil (14) and a medium-voltage regulating coil (15), and the high-voltage regulating coil (14) and the medium-voltage regulating coil (15) are wound on the outer side of the high-voltage coil (13) simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320330445.0U CN219738726U (en) | 2023-02-23 | 2023-02-23 | Be applied to voltage regulating coil structure of reactance type on-load voltage regulating transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320330445.0U CN219738726U (en) | 2023-02-23 | 2023-02-23 | Be applied to voltage regulating coil structure of reactance type on-load voltage regulating transformer |
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| Publication Number | Publication Date |
|---|---|
| CN219738726U true CN219738726U (en) | 2023-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320330445.0U Active CN219738726U (en) | 2023-02-23 | 2023-02-23 | Be applied to voltage regulating coil structure of reactance type on-load voltage regulating transformer |
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