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Power transformer

A technology for power transformers and low-voltage windings, applied in the field of power transformers, can solve problems such as limited technical effects, and achieve the effects of good maintainability, long service life, and reduction of internal defects

Inactive Publication Date: 2013-02-27
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its technical effect is still relatively limited and needs to be improved urgently.

Method used

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  • Power transformer

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Embodiment 1

[0017] A power transformer, the core of which is composed of a low-voltage winding 1 and a high-voltage winding 2 arranged in groups, and also includes an iron yoke and an iron core column 3; wherein the iron yoke is specifically divided into an upper iron yoke 4 and a lower iron yoke 5, The upper iron yoke 4 and the lower iron yoke 5 are connected through the iron core column 3 to form a frame structure, and the low-voltage winding 1 and the high-voltage winding 2 are wound on the iron core column 3; the above-mentioned parts are arranged in the barrel-type transformer shell filled with transformer oil 6; the shell 6 is a barrel structure, and the upper part of the power transformer is installed with an oil conservator capsule type oil conservator 7; the key point is: in order to prevent moisture from entering the oil conservator and deteriorating the oil, a The pipe is connected to a desiccant 8 with built-in silica gel as a desiccant from the upper part. The desiccator 8 is ...

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Abstract

The invention relates to a power transformer. A core of the power transformer is formed by low voltage windings (1) and high voltage windings (2), which are arranged in groups. Meanwhile, the power transformer also comprises an iron yoke and an iron core leg (3), wherein the iron yoke is particularly divided into an upper iron yoke (4) and a lower iron yoke (5); the upper iron yoke (4) is connected with the lower iron yoke (5) by the iron core leg (3) to form a frame structure; the low voltage windings (1) and the high voltage windings (2) are wound on the iron core leg (3); the parts are all arranged in a bucket-type transformer shell (6) with transformer oil; and a capsule-type expansion tank (7) is arranged at the upper part of the power transformer. The power transformer is characterized in that the upper part of the expansion tank (7) is communicated with a dryer (8) with silica gel which is used as a drying agent by a pipe. The power transformer has the advantages that defects and faults in the transformer can be effectively reduced; and the power transformer has a long service life, high reliability and good maintainability.

Description

technical field [0001] The invention relates to the technical field of power transformer structure design and application, and in particular provides a power transformer. Background technique [0002] A transformer is a static electrical appliance that converts AC power of one voltage level into AC power of another voltage level at the same frequency through electromagnetic induction between coils. There are many types of transformers, which can be classified according to their use, structure, number of phases, and cooling methods. [0003] During the operation of the transformer, as the oil temperature changes, the volume of the oil will expand and contract. In order to reduce the contact area between the oil and the outside air and reduce the probability of the transformer being damp and oxidized, an oil conservator (commonly known as oil pillow). However, its technical effect is still relatively limited and needs to be improved urgently. People desire to obtain a power...

Claims

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Application Information

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IPC IPC(8): H01F27/14H01F27/16H01F27/02
Inventor 王玲夏泳杜科
Owner STATE GRID CORP OF CHINA
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