CN220155357U - Layered coil voltage regulating device - Google Patents

Abstract

The utility model discloses a layered coil voltage regulating device, and relates to the technical field of transformers. The layered coil voltage regulating device comprises a first coil layer and a second coil layer. The first coil layer comprises a first base winding and a first voltage regulating winding, and the second coil layer comprises a second base winding and a second voltage regulating winding. The number of turns of the first voltage regulating winding is the same as that of the second voltage regulating winding, the first fixed value is the sum of the first base winding and the second base winding, and the second fixed value is the sum of the first base winding and the second base winding. Based on the winding numbers of the first base winding and the second base winding are adjusted, so that balance of ampere turns of the high-low voltage coil is met, axial short-circuit force of the high-low voltage coil is greatly reduced, short-circuit resistance of the transformer coil is improved, eddy current loss is reduced, local overheating is avoided, meanwhile, stable shape of the internal coil of the transformer is ensured, stable operation of the transformer is ensured, and burnout or other faults are avoided.

Description

Layered coil voltage regulating device

Technical Field

The utility model relates to the technical field of transformers, in particular to a layered coil voltage regulating device.

Background

In an electric power system, the longer the transmission distance is, the larger the voltage drop is, and in order to ensure the efficiency and the economy of electric energy transmission, high-voltage transmission is required. In order to adapt to the reduction of output voltage caused by voltage drop under different transmission and distribution distances, the high-voltage side gear of a transformer is generally adjusted to realize the matching of the input voltage at the high-voltage side and the actual voltage in a power grid so as to ensure the stability of the output voltage.

The inventor researches show that the existing wire outlet mode does not have any requirement on the balance of ampere turns, and the ampere turn force is along with the edge. Therefore, when the ampere turns are unbalanced, the transformer is in operation on the net, on one hand, eddy current loss is increased to cause local overheating, and on the other hand, the internal coil of the transformer is deformed due to the impact current on the same line, so that the transformer is burnt.

Disclosure of Invention

The utility model aims to provide a layered coil voltage regulating device which can effectively improve ampere turn balance, reduce eddy current loss, avoid local overheating, ensure stable shape of a coil inside a transformer and ensure stable operation of the transformer without burning or other faults on the basis of ensuring a high-voltage regulating range.

Embodiments of the present utility model are implemented as follows:

in a first aspect, the present utility model provides a layered coil voltage regulator comprising:

the first coil layer comprises a first basic winding and a first voltage regulating winding, the first basic winding is electrically connected with the first voltage regulating winding, and the number of turns of the first basic winding can be adjusted so as to realize the adjustment of the axial height of the first coil layer;

the second coil layer comprises a second base winding and a second voltage regulating winding, the second base winding is electrically connected with the second voltage regulating winding, the second voltage regulating winding can be electrically connected with the first voltage regulating winding to realize high-voltage gear shifting, and the second base winding can adjust the number of turns to realize the adjustment of the axial height of the second coil layer so as to ensure that the axial heights of the first coil layer and the second coil layer are equal;

and the turns of the first voltage regulating winding and the second voltage regulating winding are the same and are both a first fixed value, and the sum of the turns of the first basic winding and the second basic winding is a second fixed value.

In an alternative embodiment, the first voltage regulating winding is provided with a first tap terminal, the second voltage regulating winding is provided with a second tap terminal, and the first tap terminal is electrically connected with the second tap terminal so as to realize the electrical connection of the first voltage regulating winding and the second voltage regulating winding.

In an alternative embodiment, the layered coil voltage regulator further comprises a tap for electrically connecting the first tap terminal to the second tap terminal.

In an alternative embodiment, the number of the first tapping terminals and the number of the second tapping terminals are n, n is an integer greater than or equal to 2, the first tapping terminals with the number of n can divide the first voltage regulating winding into n-1 sections, and the second tapping terminals with the number of n can divide the second voltage regulating winding into n-1 sections;

the first tap terminals of n in number are selectively electrically connected with the second tap terminals of n in number to achieve 2n-1 speed adjustment.

In an alternative embodiment, the number of n is 3 to achieve 5-speed adjustment.

In an alternative embodiment, the number of the first tapping terminals and the second tapping terminals is 2, the first tapping terminals are used for equally dividing the first voltage regulating winding into a first tapping section and a second tapping section, and the second tapping terminals are used for equally dividing the second voltage regulating winding into a third tapping section and a fourth tapping section.

In an alternative embodiment, the first fixed value is 52 and the second fixed value is 987.

In an alternative embodiment, the second tap section is the same as the third tap section gauge, the first base winding, the second base winding, the first tap section, and the fourth tap section gauge are the same, and the second tap section, the third tap section gauge are smaller in size than the first base winding, the second base winding, the first tap section, and the fourth tap section gauge.

In an alternative embodiment, the second and third tap section gauge diameters are 2mm, and the first base winding, the second base winding, the first tap section, and the fourth tap section gauge are 1.9x3.8mm.

In an alternative embodiment, the second base winding is provided with a third tap terminal for realizing the d-connection.

The beneficial effects of the embodiment of the utility model include:

the embodiment provides a layered coil voltage regulating device, which comprises a first coil layer and a second coil layer. The first coil layer comprises a first base winding and a first voltage regulating winding, and the second coil layer comprises a second base winding and a second voltage regulating winding. The number of turns of the first voltage regulating winding is the same as that of the second voltage regulating winding, the first fixed value is the sum of the first base winding and the second base winding, and the second fixed value is the sum of the first base winding and the second base winding.

Based on the winding number of the first base winding and the second base winding is adjusted, so that the winding numbers of the first coil layer and the second coil layer are equivalent, the axial heights are the same, the ampere-turns are equal, and the reactance heights are equal, thereby meeting the balance of ampere-turns of the high-low voltage coil, greatly reducing the axial short-circuit force of the high-low voltage coil, improving the short-circuit resistance of the transformer coil, reducing the eddy current loss, avoiding local overheating, ensuring the stable shape of the internal coil of the transformer, ensuring the stable operation of the transformer, and avoiding burning or other faults.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a layered coil voltage regulator according to an embodiment of the present utility model;

fig. 2 is a schematic diagram of a layer-type coil voltage regulator according to an embodiment of the present utility model.

Icon: 100-first coil layer; 110-a first base winding; 130-a first voltage regulating winding; 131-a first tap terminal; 133-a first tap section; 135-second branching section; 200-a second coil layer; 210-a second base winding; 211-a third tap terminal; 230-a second voltage regulating winding; 231-a second tap terminal; 233-a third tap section; 235-fourth tap segment.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As in the background art, the existing wire outlet mode does not have any requirement on the balance of the ampere-turns, and the magnitude of the ampere-turn force is along with the margin. Therefore, when the ampere turns are unbalanced, the transformer is in operation on the net, on one hand, eddy current loss is increased to cause local overheating, and on the other hand, the internal coil of the transformer is deformed due to the impact current on the same line, so that the transformer is burnt.

In order to improve the above problems, the present embodiment provides a layered coil voltage regulator, which can effectively improve ampere-turn balance, reduce eddy current loss, avoid local overheating, ensure stable shape of the internal coil of the transformer, and ensure stable operation of the transformer without burnout or other faults on the basis of ensuring a high voltage regulation range.

Fig. 1 is a schematic diagram of a layered coil voltage regulator according to the present embodiment, and referring to fig. 1 and 2, the layered coil voltage regulator according to the present embodiment includes a first coil layer 100 and a second coil layer 200.

The first coil layer 100 includes a first base winding 110 and a first voltage regulating winding 130, the first base winding 110 is electrically connected with the first voltage regulating winding 130, and the number of turns of the first base winding 110 can be adjusted to realize adjustment of an axial height of the first coil layer 100.

The second coil layer 200 includes a second base winding 210 and a second voltage regulating winding 230, the second base winding 210 is electrically connected with the second voltage regulating winding 230, and the second voltage regulating winding 230 can be electrically connected with the first voltage regulating winding 130 to realize a high voltage shift station; the second base winding 210 can be adjusted in number of turns to achieve adjustment of the axial height of the second coil layer 200 so that the axial heights of the first coil layer 100 and the second coil layer 200 are equal.

And, the number of turns of the first voltage regulating winding 130 and the second voltage regulating winding 230 are the same and are both a first fixed value, and the sum of the number of turns of the first base winding 110 and the second base winding 210 is a second fixed value.

Based on the above arrangement, on the premise that the sum of the turns of the first base winding 110 and the second base winding 210 is a second fixed value, the turns of the first base winding 110 and the turns of the second base winding 210 are respectively adjusted, so that the turns of the first coil layer 100 and the second coil layer 200 are equivalent in axial height, the ampere-turns are equal, and the reactance heights are equal, thereby satisfying the ampere-turn balance of the high-voltage coil and the low-voltage coil, greatly reducing the axial short-circuit force of the high-voltage coil and improving the short-circuit resistance of the transformer coil.

In order to realize high voltage regulation, the first voltage regulating winding 130 is provided with a first tapping terminal 131, the second voltage regulating winding 230 is provided with a second tapping terminal 231, and the first tapping terminal 131 is electrically connected with the second tapping terminal 231 so as to realize the electrical connection between the first voltage regulating winding 130 and the second voltage regulating winding 230.

Further, the layered coil voltage regulating device further includes a tapping piece for electrically connecting the first tapping terminal 131 with the second tapping terminal 231. Of course, in other embodiments, the first tap terminal 131 and the second tap terminal 231 may be electrically connected by a lead.

Further, the number of the first tapping terminals 131 and the second tapping terminals 231 is n, n is an integer greater than or equal to 2, the first tapping terminals 131 with n numbers can divide the first voltage regulating winding 130 into n-1 sections, and the second tapping terminals 231 with n numbers can divide the second voltage regulating winding 230 into n-1 sections; and, the n number of first tap terminals 131 are selectively electrically connected with the n number of second tap terminals 231 to achieve 2n-1 speed adjustment.

Through above-mentioned setting, the laminar coil voltage regulating device that this embodiment provided can realize high-pressure side gear and adjust to make electrical power system guarantee output voltage's stability when guaranteeing power transmission's efficiency and economic nature.

Because the conventional oil-immersed transformer needs to meet five-gear voltage regulation, in the embodiment, n is 3 in number to achieve 5-gear regulation. Of course, in other embodiments, n may be 2 to achieve 3-speed adjustment; still alternatively, n may be 4 to achieve 7-speed adjustment.

Further, referring to fig. 1 and 2 again, for the first tap terminal 131 and the second tap terminal 231, the number of the first tap terminal 131 is 2, the first tap terminal 131 is used for equally dividing the first voltage regulating winding 130 into the first tap section 133 and the second tap section 135, and the second tap terminal 231 is used for equally dividing the second voltage regulating winding 230 into the third tap section 233 and the fourth tap section 235.

Further, the first fixed value is 52, and the second fixed value is 987. On the basis, the first tapping section 133, the second tapping section 135, the third tapping section 233 and the fourth tapping section 235 are 26 turns, so that the high-voltage gear satisfies the formula of 10+/-2 x 2.5%/0.4, namely, the high-voltage gear is respectively a first gear, namely 10500V, a second gear, namely 10250V, a third gear, namely 10000V, a fourth gear, namely 9750V and a fourth gear, namely 9500V.

Specifically, based on the above arrangement, as shown in fig. 2, the first tapping terminals 131 are provided in 3, including X2, X4, X6; the second tap terminals 231 are provided in 3 numbers including X3, X5, and X7.

When the tapping sheet is connected with X2-X3, the voltage at the high-voltage side is 10500V which is the first grade;

when the tapping sheet is connected with X3-X4, the voltage at the high-voltage side is 10250V as the second gear;

when the tapping sheet is connected with X4-X5, the voltage at the high-voltage side is 10000V which is the third gear;

when the tapping sheet is connected with X5-X6, the voltage at the high-voltage side is 9750V which is the fourth gear;

when the tap is connected at X6-X7, the high side voltage is at the fifth gear, 9500V.

In addition, in the present embodiment, the second branch section 135 is the same as the third branch section 233 in gauge, the first base winding 110, the second base winding 210, the first branch section 133, and the fourth branch section 235 are the same in gauge, and the second branch section 135, the third branch section 233 are smaller in gauge than the first base winding 110, the second base winding 210, the first branch section 133, and the fourth branch section 235.

In this way, the second and third tap sections 135 and 233 each use a small standard wire gauge that is 1% -2% different in cost from the other winding wire gauges. Therefore, the second and third tapping sections 135 and 233 use small wire gauges that meet the requirements, and the product cost can be effectively reduced on the premise of meeting the performance.

In detail, the second and third tap sections 135 and 233 have gauge diameters of 2mm, and the first, second, first and fourth base windings 110, 210, 133 and 235 have gauge diameters of 1.9x3.8mm.

It should be further noted that, the diameters of the gauge wire of the second tapping section 135 and the third tapping section 233 are 2mm, which are selected according to the rule of selection of four amperes per square millimeter. In addition, the coil windings in the second branching section 135 and the third branching section 233 are thinned, so that the technical effect of reducing the eddy current loss can be achieved.

In the present embodiment, the second base winding 210 is provided with a third tap terminal 211, and the third tap terminal 211 is used to realize d-connection. In addition, as shown in fig. 1 and 2, the third tapping terminal 211 is X, and it should be noted that, in the layer-type coil voltage regulating device provided in the embodiment, a dyn 11-wired transformer is adopted, so that the high-voltage winding adopts d-connection, that is, triangle connection; the low pressure side is y-connected, i.e. star-connected.

Based on this, in this embodiment, the layer-type coil voltage regulator realizes d connection through the first tapping terminal 131, that is, three-phase loads (or coils) are connected end to end, so as to perform a good filtering or weakening function on third harmonic or zero sequence magnetic flux in the circuit, and further, the transformer adopting d connection can prevent the influence of the third harmonic or zero sequence magnetic flux on the high-voltage side power supply voltage waveform.

Taking this embodiment as an example, the working principle and the working flow of the layered coil voltage regulating device are as follows:

on the basis that the number of turns of the first voltage regulating winding 130 and the second voltage regulating winding 230 are the same and are both the first fixed value, the number of turns of the first base winding 110 and the second base winding 210 can be adjusted to respectively adjust the axial heights of the first coil layer 100 and the second coil layer 200, and the sum of the number of turns of the first base winding 110 and the second base winding 210 is the second fixed value.

Based on this, the first and second coil layers 100 and 200 may be symmetrically distributed in structure by adjusting the number of turns of the first and second base windings 110 and 210 without increasing the cost of the transformer. In addition, the second tapping section 135 and the third tapping section 233 are adjusted to be smaller-sized wire gauges, so that the quality of the transformer is ensured and the cost of the transformer is reduced.

In summary, the present embodiment provides a layered coil voltage regulator, which includes a first coil layer 100 and a second coil layer 200. Wherein the first coil layer 100 includes a first base winding 110 and a first voltage regulating winding 130, and the second coil layer 200 includes a second base winding 210 and a second voltage regulating winding 230. The number of turns of the first voltage-regulating winding 130 and the second voltage-regulating winding 230 are the same, and are both a first fixed value, and the sum of the numbers of turns of the first base winding 110 and the second base winding 210 is a second fixed value.

Based on this, the number of turns of the first base winding 110 and the second base winding 210 is adjusted, so that the number of turns of the first coil layer 100 is equal to the number of turns of the second coil layer 200, the axial heights are the same, the ampere-turns are equal, and the reactance heights are equal, thereby satisfying the ampere-turn balance of the high-voltage coil and the low-voltage coil, greatly reducing the axial short-circuit force of the high-voltage coil and improving the short-circuit resistance of the transformer coil. In addition, the eddy current loss is reduced, local overheating is avoided, meanwhile, the shape stability of the internal coil of the transformer is ensured, the running stability of the transformer is ensured, and burning or other faults do not occur.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A layered coil voltage regulator, comprising:

a first coil layer (100), the first coil layer (100) comprising a first base winding (110) and a first voltage regulating winding (130), the first base winding (110) being electrically connected to the first voltage regulating winding (130), and the first base winding (110) being capable of adjusting the number of turns to achieve an adjustment of the axial height of the first coil layer (100);

a second coil layer (200), the second coil layer (200) comprising a second base winding (210) and a second voltage regulating winding (230), the second base winding (210) being electrically connected to the second voltage regulating winding (230), and the second voltage regulating winding (230) being electrically connectable to the first voltage regulating winding (130) to achieve a high voltage shift, the second base winding (210) being adjustable in number of turns to achieve an adjustment of an axial height of the second coil layer (200) to equalize the axial heights of the first coil layer (100) and the second coil layer (200);

and the number of turns of the first voltage regulating winding (130) and the number of turns of the second voltage regulating winding (230) are the same and are both a first fixed value, and the sum of the number of turns of the first base winding (110) and the number of turns of the second base winding (210) is a second fixed value.

2. The layered coil voltage regulating device according to claim 1, wherein the first voltage regulating winding (130) is provided with a first tap terminal (131), the second voltage regulating winding (230) is provided with a second tap terminal (231), and the first tap terminal (131) is electrically connected to the second tap terminal (231) to realize an electrical connection of the first voltage regulating winding (130) and the second voltage regulating winding (230).

3. The layered coil voltage regulator according to claim 2, further comprising a tap for electrically connecting the first tap terminal (131) with the second tap terminal (231).

4. The layered coil voltage regulator according to claim 3, wherein the number of the first tapping terminals (131) and the second tapping terminals (231) is n, and n is an integer greater than or equal to 2, the first tapping terminals (131) of the number n being capable of equally dividing the first voltage regulating winding (130) into n-1 segments, and the second tapping terminals (231) of the number n being capable of equally dividing the second voltage regulating winding (230) into n-1 segments;

the first tap terminals (131) of the number n are selectively electrically connected with the second tap terminals (231) of the number n to achieve 2n-1 speed adjustment.

5. The layered coil voltage regulator according to claim 4, wherein the number of n is 3 to achieve 5-stage regulation.

6. The layered coil voltage regulator according to claim 5, wherein the number of the first tap terminals (131) and the second tap terminals (231) is 2, the first tap terminals (131) are used for equally dividing the first voltage regulating winding (130) into a first tap section (133) and a second tap section (135), and the second tap terminals (231) are used for equally dividing the second voltage regulating winding (230) into a third tap section (233) and a fourth tap section (235).

7. The layered coil voltage regulator according to claim 6, wherein the first fixed value is 52 and the second fixed value is 987.

8. The layered coil voltage regulator of claim 7, wherein the second tap segment (135) is the same wire gauge as the third tap segment (233), the first base winding (110), the second base winding (210), the first tap segment (133), and the fourth tap segment (235) are the same wire gauge, and the second tap segment (135), the third tap segment (233), and the wire gauge are smaller than the first base winding (110), the second base winding (210), the first tap segment (133), and the fourth tap segment (235).

9. The layered coil voltage regulator according to claim 8, wherein the second (135) and third (233) tap segments each have a gauge diameter of 2mm, and the first (110), second (210), first (133) and fourth (235) tap segments each have a gauge diameter of 1.9x3.8mm.

10. Layer coil voltage regulator according to claim 1, characterized in that the second basic winding (210) is provided with a third tap terminal (211), which third tap terminal (211) is used for realizing d-connection.