CN205303135U - Dry -type transformer high -pressure coil and dry -type transformer - Google Patents

Abstract

The utility model relates to a dry -type transformer high -pressure coil and because this high -pressure coil's dry -type transformer. The coil has adopted the oblique drawknot of multistage laminar to construct, and the mode that tapping position taked inboard shunting to take a percentage is made, and wherein dry -type transformer adopts above -mentioned coil, and through above -mentioned institutional advancement, dry -type transformer not only can reduce intersegmental electric field strength, makes the inside field distribution of coil more even, has improved the quality of product, and having changed transformer coil's hourglass magnetic field distribution, the short -circuit impedance of transformer obtains changing, and then reduces the coil main material use amount of transformer, makes transformer cost reduction.

Description

Dry transformer high-tension coil and dry-type transformer

Technical field

This utility model relates to electric field, particularly a kind of dry transformer high-tension coil and the dry-type transformer based on this high-tension coil.

Background technology

At home, the commonly used multistage layered structure of 10��35KV level non-excitation pressure adjustment dry transformer high-tension coil, see accompanying drawing 1. At present, the prices of raw materials remain high, particularly copper material and stalloy price. Showing according to up-to-date material price, copper conductor maintains essentially in the stalloy price of 2��3 times, so in dry-type transformer designs, how reducing copper material consumption, is the key point reducing cost. Theoretical according to design of transformer, in product, copper consumption and stalloy consumption are inversely, therefore a kind of new structure of utility model is under the premise not changing profile, effectively reduces copper consumption, it is ensured that transformer performance becomes the primary study problem of this utility model structure.

Summary of the invention

The purpose of this utility model is in that to provide a kind of product quality high, lower-cost dry transformer high-tension coil, high-tension coil winding method and dry-type transformer.

The purpose of this utility model is achieved through the following technical solutions: it includes stem stem and first coil and the second coil, first coil and the second coil winding on stem stem; In first coil, inside and outside two sections of coils it are divided into outward by the stage casing of stem stem, the conducting wire end of first coil starts from stem stem stage casing, after the wire outer extreme direction coiling ground floor from the stage casing of stem stem to stem stem, the more oppositely wound second layer, coiling odd-level so repeatedly, forming inner segment coil, oblique pull wire is to the stem stem in the outside of inner segment coil afterwards, is wound around according to the winding method of inner segment coil, after winding terminates, the wire end in first coil leads to joint; Wherein, draw at the inner coil internal layer of first coil and have some taps to position between group,

Second coil is symmetrical with first coil, and the coil tail end of the second coil leads to joint, and the inner coil internal layer of the second coil draws position between some tap groups,

Second coil is with first coil, and between each section of coil, the number of plies is identical.

A kind of dry-type transformer, its coil adopts above-mentioned high-tension coil.

Compared to prior art, the utility model has the advantage of: coil have employed multistage laminar slant-pull structure, tap position takes the mode of inner side shunting tap.It is not only able to reduce section field intensity, makes coil inside Electric Field Distribution more uniform, improve the quality of product; And changing the Magnetic fluxleakage distribution of transformer coil, the short-circuit impedance of transformator is changed, and then the coil main material reducing transformator makes consumption, makes transformator cost reduce.

Accompanying drawing explanation

Fig. 1 is conventional dry transformer device structure high-tension coil schematic diagram.

Fig. 2 is dry transformer high-tension coil new construction schematic diagram.

Fig. 3 is high-tension coil tapping schematic diagram.

Label declaration: 1 stem stem, 21 first coils, 22 first coils, 3,4,5 be the tap of the second coil, 6,7,8 is the tap of first coil. Wherein 1. for the outer section coil of first coil, 2. for the inner segment coil of first coil, 3. be the inner segment coil of the second coil, be 4. the outer section coil of the second coil.

Detailed description of the invention

Below in conjunction with Figure of description and embodiment, this utility model content is described in detail:

As shown in figures 2-3: the purpose of this utility model is achieved through the following technical solutions: it includes stem stem 1 and first coil 21 and the second coil 22, it is characterised in that: first coil and the second coil winding are on stem stem; In first coil, the stage casing of stem stem being divided into inside and outside two sections of coils outward, the conducting wire end of first coil starts from stem stem stage casing, after the wire outer extreme direction coiling ground floor from the stage casing of stem stem to stem stem, the oppositely wound second layer again, so repeatedly coiling odd-level, form inner segment coil, oblique pull wire is to the stem stem in the outside of inner segment coil afterwards, being wound around according to the winding method of inner segment coil, be wound around after terminating, the wire end in first coil leads to joint A, B, C; Wherein, the inner coil internal layer in first coil draws some taps 8,7, position between 6 to group,

Second coil and first coil are symmetrical, and the wire end of the second coil leads to the inner coil internal layer of joint X, Y, Z, the second coil and draws and have position between some taps 5,4,3 groups,

Second coil is with first coil, and between each section of coil, the number of plies is identical.

The winding method of dry transformer high-tension coil, it comprises the following steps,

A. winding former or stem stem are placed on coil winding machine or iron core apparatus, on each winding former or stem stem around coil be divided into two groups, two groups of coil respectively first coils and the second coil; Wherein, often group coil is divided into again inside and outside two sections of coils;

B. with the conducting wire end of first coil for starting point, it is carried out coiling, and conducting wire end starts from stem stem stage casing, after the wire outer extreme direction coiling ground floor from the stage casing of stem stem to stem stem, the oppositely wound second layer again, coiling odd-level, forms inner segment coil, in winding process so repeatedly, inner coil internal layer in first coil is drawn some taps 8,7,6, and it is drawn out between group by multiple taps position;

C. after step b coiling completes, oblique pull wire is to the stem stem in the outside of inner segment coil, carry out the coiling of outer section of coil, after the wire outer extreme direction coiling ground floor from the stage casing of stem stem to stem stem, the more oppositely wound second layer, coiling so repeatedly, the coiling number of plies of its China and foreign countries' section coil is identical with inner segment coil, last from first coil wire end extraction joint A, B, C;

D. coiling the second coil, the second described coil winding step is identical with first coil, and the second coil of completing of coiling is symmetrical with first coil, second coil is in winding process, inner coil internal layer at the second coil is drawn multiple taps 5,4,3, and it is drawn out between group by multiple taps position;And draw joint X, Y, Z from the second winding wire tail end.

A kind of dry-type transformer, its coil adopts above-mentioned high-tension coil.

The dry type transformer structure that this utility model structural change is traditional, the multistage number of plies that coil adopts, the mode of tap in oblique pull, structure refers to accompanying drawing 2. This utility model does not change the shunting tap position of high-tension coil, the number of turn and profile, and shunting tap schematic diagram refers to Fig. 3. This utility model emphasis have employed the mode of intersegmental oblique pull and is attached, and decreases intersegmental wire welding quantity, improves processing quality. Shunting tap and tradition differ widely, and have employed interior shunting tap mode, and technique is identical with manufacture in the past, under the premise not increasing technology difficulty, change the performance of product so that performance meets expected design. This new construction may be used for improving transformer performance index, particularly short-circuit impedance, it is possible to for adjusting the main material usage ratio of transformator, for the dry-type transformer cost declining project implementation. By above-mentioned design, change coil inside Magnetic fluxleakage distribution, it is possible to improve impedance voltage at least 3%, and then reduce copper consumption, reduce cost.

Claims (2)

1. dry transformer high-tension coil, it includes stem stem (1) and first coil (21) and the second coil (22), it is characterised in that: first coil and the second coil winding are on stem stem; In first coil, inside and outside two sections of coils it are divided into outward by the stage casing of stem stem, the conducting wire end of first coil starts from stem stem stage casing, after the wire outer extreme direction coiling ground floor from the stage casing of stem stem to stem stem, the oppositely wound second layer again, coiling odd-level so repeatedly, form inner segment coil, oblique pull wire is to the stem stem in the outside of inner segment coil afterwards, it is wound around according to the winding method of inner segment coil, after winding terminates, the wire end in first coil leads to joint (A (B, C)); Wherein, draw at the inner coil internal layer of first coil and have some taps (8,7,6) to position between group,

Second coil is symmetrical with first coil, and the wire end of the second coil leads to joint (X (Y, Z)), and the inner coil internal layer of the second coil draws position between some taps (5,4,3) group,

Second coil is with first coil, and between each section of coil, the number of plies is identical.

2. the dry-type transformer of the high-tension coil adopted described in claim 1, it is characterised in that its coil adopts above-mentioned high-tension coil.