KR101453124B1

KR101453124B1 - Winding coil for oil insulated transformer

Info

Publication number: KR101453124B1
Application number: KR1020100046168A
Authority: KR
Inventors: 배병현; 이종호
Original assignee: 엘에스산전 주식회사
Priority date: 2010-05-17
Filing date: 2010-05-17
Publication date: 2014-10-27
Also published as: KR20110126477A

Abstract

The present invention relates to a winding of an inflow transformer, comprising a high-voltage winding disposed at an outermost side, a medium-voltage winding arranged to be insulated inside the high-voltage winding, a low-voltage winding And a semi-conductor which is disposed to surround a portion where a maximum electric field is concentrated among the high-voltage windings and alleviates a concentrated electric field, thereby reducing the weight of the transformer while reducing the concentration of the electric field, and simplifying the working process.

Description

[0001] WINDING COIL FOR OIL INSULATED TRANSFORMER [0003]

The present invention relates to an induction transformer winding capable of improving the dielectric strength and improving the productivity by simplifying the work process.

In the inflow type transformer, the winding is heated during operation, and the generated heat is radiated to the outside air by radiation or convection using the insulating oil filled in the transformer. While the temperature is increased while the heat generation amount is larger than the heat radiation amount, The temperature is kept constant.

As the demand of ultra high voltage transformer is increased, a transformer is being developed to improve the insulation performance of the transformer.

FIG. 1 is a perspective view showing a winding structure of a superhigh-voltage transformer according to the related art, and FIG. 2 is a partially enlarged view showing a winding structure of a superhigh-voltage transformer according to the prior art.

The high voltage winding 20 is disposed on the outermost periphery of the winding of the transformer according to the prior art and the medium voltage winding 20 is disposed on the inner surface of the high voltage winding 20 so as to be insulated from the high voltage winding 10, The low-voltage winding 30 is disposed so as to be insulated from the medium-voltage winding 20.

An electrostatic plate 40 having the same level as the first turn of the high-voltage winding 10 is inserted into the upper end of the lead-in portion 12 of the high-voltage winding terminal. This electrostatic plate 40 spreads the concentration of the electric field in accordance with the application of the brain impulse voltage uniformly so that the electric field concentrating toward the medium voltage winding 20 and the low voltage winding 30 which are adjacent to each other in the high voltage winding 10, Thereby improving the electric field relaxation effect and improving the dielectric strength.

The electrostatic plate 40 is formed by pressing a press wood or a press board into a ring shape and winding a copper wire on its outer surface and welding a lead wire to the copper foil to form a high voltage winding 10 ), And the exposed copper foil is again wound up with insulating paper.

However, the conventional electrostatic plate 40 has a complicated structure, which makes it difficult to manufacture and a long working time.

In addition, the weight of the structure for mounting the electrostatic plate 40 and the electrostatic plate 40 on the high-voltage winding 10 increases the overall weight of the transformer, thereby adversely affecting the designing stage in which weight is important. There is a problem that it becomes crazy.

The present invention provides an induction transformer winding capable of improving the insulation structure of the winding to improve the electric field relaxation effect and simplifying the work process, thereby improving the productivity and minimizing the weight increase of the transformer.

The technical object of the present invention is not limited to the above-mentioned technical objects and other technical objects which are not mentioned can be clearly understood by those skilled in the art from the following description will be.

In one embodiment, the windings of the inflow-type transformer include a high-voltage winding disposed at the outermost side, a medium-voltage winding arranged so as to be insulated inside the high-voltage winding, a low-voltage winding disposed insulatively inside the middle- And the entirety of the high-voltage winding is disposed so as to surround a portion where the maximum electric field is concentrated, thereby alleviating the concentrated electric field.

The windings of the inflow type transformer of the present invention are provided so as to surround the entirety of the peninsula at the high voltage winding inlet end where the maximum electric field is concentrated so that the concentrated electric field can be evenly diffused to alleviate the electric field concentration. Since the manufacturing is completed, the work process can be simplified and the weight of the transformer can be minimized.

FIG. 1 is a perspective view of a conventional induction transformer. FIG.
2 is a partially enlarged view showing a winding structure of an influent type transformer according to the related art.
FIG. 3 is a perspective view of a winding of an induction transformer according to an embodiment of the present invention.
4 is a partial enlarged view of a winding of an input transformer according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience. In addition, terms defined in consideration of the configuration and operation of the present invention may be changed according to the intention or custom of the user, the operator. Definitions of these terms should be based on the content of this specification.

FIG. 3 is a partially cut-away perspective view of a winding of an input transformer according to one embodiment of the present invention, and FIG. 4 is a partially enlarged view of a winding of an input transformer according to an embodiment of the present invention.

3 and 4, the winding of the induction transformer according to an embodiment of the present invention includes a high-voltage winding 100 wound on the outermost side, a high-voltage winding 100 on the inside of the high-voltage winding 100, And a low-voltage winding 300 wound around the intermediate-voltage winding 200 so as to be insulated from the medium-voltage winding 200. The intermediate-voltage winding 200 is wound around the intermediate-

When a maximum electric field is applied during the insulation test of the brain in such a transformer, the portion broken at the time of insulation failure shows almost a constant pattern. That is, when a brain impulse voltage is applied, a maximum electric field is concentrated in a certain portion of the winding conductor region, and thus an electric field higher than the surrounding electric field is introduced into the insulation breakdown region.

Accordingly, a semiconductive body 500 is provided for diffusing an electric field concentrated in a region where the maximum electric field of the high-voltage winding 100 is concentrated, thereby relieving the electric field.

Since most of the high voltage winding 100 is concentrated at the high voltage winding lead 120, the semiconductor integrated circuit 500 is installed at the high voltage winding lead 120.

The entire semiconductive body 500 is disposed to be wrapped around the high-voltage winding inlet 120, and is installed in a bonding or bundling manner. That is, one side of the half-conductor 500 is wrapped on the inner surface of the high-voltage winding lead 120 and the other side is wrapped on the outer surface of the high-voltage winding lead 120 and its center side is connected to the high- ).

In addition, the entire semiconductive body 500 can be bonded to the high-voltage winding inlet 120 using an adhesive, and any other fixing method such as a binding method other than bonding can be applied.

An insulator 400 for insulating the upper end of the high-voltage winding 100 and the semiconductive body 500 is disposed at the upper end of the high-voltage winding lead 120.

This insulator 400 can be fixed by bonding the upper end of the high-voltage winding 100, and a pressboard or press wood can be used. In addition, any material having an insulating performance can be applied.

The maximum electric field concentrated on the high-voltage winding lead-in terminal 120 is a current which flows through the high-voltage winding lead-in terminal 120, It passes. The electric field passing through the entire semiconductive body 500 has a property of uniformly distributing along the outer surface of the semiconductive body 500. Accordingly, the concentrated electric field is spread widely, and the electric field per unit length is reduced, so that the dielectric strength can be improved.

Since the entire semi-conductor 500 is light in weight, it is possible to reduce the weight of the transformer and to attach the entire semiconducting wire 500 to the inlet of the high-voltage winding, the work process is simple and simple, have.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Accordingly, the true scope of the present invention should be determined by the following claims.

100: high-tension winding 120: high-tension winding inlet
200: Medium-voltage winding 300: Low-voltage winding
400: Insulator 500: Full width

Claims

A high-voltage winding disposed at an outermost side of the high-voltage winding, the semiconductor being surrounded by the high-voltage winding inlet portion where the maximum electric field is concentrated;
A middle-tension winding disposed insulatively inside the high-tension winding;
A low-voltage winding insulated from inside the intermediate-tension winding; And
And a half-conductor disposed to surround a portion where a maximum electric field is concentrated among the high-voltage windings to alleviate a concentrated electric field,
Wherein a height of an upper end of the low-voltage winding is higher than a height of an upper surface of the medium-voltage winding and a top surface of the semiconductor of the high-
Wherein one surface of the entire semiconductive member surrounds the inner surface of the high-voltage winding, the other surface of the semiconductive member surrounds the outer surface of the high-voltage winding, the central side of the entire semiconductive member surrounds the upper end of the high-
Wherein the insulator is interposed between the center of the entire peninsula and the upper end of the high-voltage winding inlet.

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The method according to claim 1,
Wherein the insulator is comprised of a pressboard or a presswood.

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