CN211957388U

CN211957388U - Single-phase converter transformer body structure

Info

Publication number: CN211957388U
Application number: CN202021030782.0U
Authority: CN
Inventors: 杨哲; 陈志伟; 李文平; 王春钢; 李志伟; 李程; 赵翠; 龙腾
Original assignee: Baoding Tianwei Baobian Electric Co Ltd
Current assignee: Baoding Tianwei Baobian Electric Co Ltd
Priority date: 2020-06-08
Filing date: 2020-06-08
Publication date: 2020-11-17
Anticipated expiration: 2030-06-08

Abstract

The utility model relates to a single-phase converter transformer ware body structure belongs to transformer technical field. The technical scheme is as follows: the two iron core columns (1) and the two iron core yokes (2) are combined together to form a square iron core, and each iron core column (1) in the square iron core is sleeved with a net side winding and a valve side winding to form a square single-phase converter transformer body; a body supporting plate (10) is arranged below the square single-phase converter transformer body, and a body pressing plate (9) is arranged above the square single-phase converter transformer body. The utility model has the advantages that: the number of single-phase converter transformers is reduced by half, investment cost is greatly reduced, harmonic loss is reduced, and the method has great advantages on construction period progress and engineering occupation. The length of the transformer body is shortened, the length of the oil tank is shortened, and the using amount of transformer oil is reduced. The iron core with the square structure has few types of sheet, good manufacturability and low loss.

Description

Single-phase converter transformer body structure

Technical Field

The utility model relates to a single-phase converter transformer ware body structure belongs to transformer technical field.

Background

The converter transformer is used as an important device of a direct current transmission system, and the operation reliability of the converter transformer plays an important role in the normal operation of the direct current transmission system.

Most of direct current transmission projects at present adopt 12 pulse converter units, wherein the 12 pulse converter units are formed by connecting two 6 pulse converter units with the voltage phase difference of 30 degrees on the alternating current side in series on the direct current side. The converter transformer has a transformer function, the alternating voltage is converted into the voltage required by a direct current circuit, meanwhile, a group of 6-pulse converter unit voltages are generated by a valve side winding triangular wiring structure of the converter transformer, a group of 6-pulse converter unit voltages are generated by a valve side winding star-shaped wiring structure of the converter transformer, and the two groups of voltages have a phase angle difference of 30 degrees. In the conventional 12-pulse direct-current transmission project, at least six single-phase converter transformers are used for realizing the 12-pulse direct-current transmission project, namely a three-phase group consisting of three angle-connected single-phase converter transformers and a three-phase group consisting of three star-connected single-phase converter transformers are connected in series to meet the project requirement. If the capacity of the direct current transmission line is small, and meanwhile, the converter transformer is required to have six single-phase transformers of two groups of three-phase voltage series structures of a triangular wiring structure of a valve side winding and a star-shaped wiring structure, cost control becomes a problem of primary consideration of the project.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a single-phase converter transformer ware body structure can furthest's saving cost when satisfying direct current engineering circuit needs, and the problem that exists among the solution background is solved to the loss reduction.

The technical scheme of the utility model is that:

a single-phase converter transformer body structure comprises iron core columns, iron core yokes, a transformer body pressing plate and a transformer body supporting plate, wherein the two iron core columns and the two iron core yokes are combined together to form a square iron core; a body supporting plate is arranged below the square single-phase converter transformer body, and a body pressing plate is arranged above the square single-phase converter transformer body.

And the net side windings on the two iron core columns of the square iron core are in a parallel connection structure.

The utility model discloses a winding connection method adopts the single-phase converter transformer ware body structure that the aforesaid was injectd, when three single-phase converter transformer constitute three-phase converter transformer group, the valve side winding of an iron core post connects into the triangle-shaped structure among every single-phase converter transformer, and the valve side winding of another iron core post connects into the star structure.

The utility model discloses be different from traditional four post iron core structures, mainly to the single-phase converter transformer ware body structure that medium-sized capacity (about 50 MVA) direct current transmission line development was researched out. The utility model discloses a single-phase converter transformer, the iron core is the structure of square, and the winding is for leaning against back duplex winding structure, all overlaps net side winding and a valve side winding simultaneously on every iron core post promptly, when three single-phase converter transformer constitute three-phase converter transformer group, the valve side winding of an iron core post connects into the triangle-shaped structure in every single-phase converter transformer, and the valve side winding of another iron core post connects into the star structure, and net side winding on two iron core posts is parallelly connected structure.

The utility model has the advantages that: the number of single-phase converter transformers is reduced by half, investment cost is greatly reduced, harmonic loss is reduced, and the method has great advantages on construction period progress and engineering occupation. The square-shaped transformer body structure removes a side column part in the conventional converter transformer body, shortens the length of the transformer body, shortens the length of an oil tank and reduces the using amount of transformer oil. The iron core with the square structure has few types of sheet, good manufacturability and low loss.

Drawings

FIG. 1 is a front view of a square iron core;

FIG. 2 is a side view of a square core;

FIG. 3 is a front view of the present invention;

fig. 4 is a side view of the present invention;

in the figure: the transformer comprises an iron core column 1, an iron core yoke 2, an angle connection column valve side winding 3, an angle connection column net side winding 4, an angle connection column voltage regulating winding 5, a star connection column voltage regulating winding 6, a star connection column net side winding 7, a star connection column valve side winding 8, a transformer body pressing plate 9 and a transformer body supporting plate 10.

Detailed Description

The invention will be further explained by way of example with reference to the accompanying drawings.

Referring to the attached drawings 1-4, a single-phase converter transformer body structure comprises iron core columns 1, iron core yokes 2, a body pressing plate 9 and a body supporting plate 10, wherein the two iron core columns 1 and the two iron core yokes 2 are combined together to form a square iron core, and a net side winding and a valve side winding are sleeved on each iron core column 1 in the square iron core to form the square single-phase converter transformer body; a body supporting plate 10 is arranged below the square single-phase converter transformer body, and a body pressing plate 9 is arranged above the square single-phase converter transformer body.

And the net side windings on the two iron core columns 1 of the square iron core are in a parallel connection structure.

The utility model discloses a winding connection method adopts foretell single-phase converter transformer ware body structure, when three single-phase converter transformers constitute three-phase converter transformer group, the valve side winding of an iron core post 1 connects into the triangle-shaped structure among every single-phase converter transformer, and the valve side winding of another iron core post 1 connects into the star configuration.

The specific embodiment is as follows:

in the present embodiment, as shown in fig. 1 and 2, two core legs 1 and two core yokes 2 are combined together to form a rectangular iron core.

As shown in fig. 3, the angle-connected-column valve-side winding 3, the angle-connected-column-network-side winding 4, and the angle-connected-column voltage-regulating winding 5 are collectively sleeved on one iron core column, and the star-connected-column voltage-regulating winding 6, the star-connected-column-network-side winding 7, and the star-connected-column valve-side winding 8 are collectively sleeved on another iron core column, so as to form a back-to-back iron-core single-phase converter transformer body structure.

As shown in fig. 4, the body of the back-to-back square iron core single-phase converter transformer adopts an integral sleeving and compressing structure, and all windings are respectively sleeved on two iron core columns.

The utility model discloses an advanced suit and pressure equipment technology make whole mouth style of calligraphy ware body fastening reliable, have improved the anti short circuit ability of product effectively.

Claims

1. A single-phase converter transformer body structure is characterized in that: the transformer comprises iron core columns (1), iron core yokes (2), a transformer body pressing plate (9) and a transformer body supporting plate (10), wherein the two iron core columns (1) and the two iron core yokes (2) are combined together to form a square iron core, and a net side winding and a valve side winding are sleeved on each iron core column (1) in the square iron core to form a square single-phase converter transformer body; a body supporting plate (10) is arranged below the square single-phase converter transformer body, and a body pressing plate (9) is arranged above the square single-phase converter transformer body.

2. The body structure of a single-phase converter transformer according to claim 1, wherein: and the net side windings on the two iron core columns (1) of the square iron core are in a parallel connection structure.