Electrical insulation paper for transformer winding, liquid-immersed transformer and preparation method

A technology of transformer winding and electrical insulation, applied in the direction of transformer/inductor corrosion protection, transformer/inductor coil/winding/connection, transformer/inductor components, etc., can solve the problem of slow chemical reaction speed, high cost and complex manufacturing. Process and other problems, to achieve the effect of good oxidation resistance and hydrolysis resistance, good heat resistance characteristics, good impregnation characteristics

Pending Publication Date: 2022-02-25
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, hydrogen bonds are formed between cellulose molecules, and the chemical reaction ...

Method used

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  • Electrical insulation paper for transformer winding, liquid-immersed transformer and preparation method
  • Electrical insulation paper for transformer winding, liquid-immersed transformer and preparation method
  • Electrical insulation paper for transformer winding, liquid-immersed transformer and preparation method

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Effect test

Embodiment

[0033] refer to figure 1 , an electrical insulating paper for transformer windings, comprising a paper-based material 10, and further comprising:

[0034] A resin layer 20, the resin layer is coated on the surface of the paper-based material, and the thickness of the resin layer is 0.8-1.2 μm;

[0035] Wherein, the main component of the paper-based material is cellulose; the material of the resin layer is epoxy resin, and the resin layer 20 can prevent moisture from entering the paper-based material 10, which can reduce the aging degree of the cellulose material. In addition, the thickness of the resin layer is controlled at 0.8 Between -1.2μm, and it needs to completely cover the paper base material, so as to inhibit the water absorption of the paper base material.

[0036] The electrical insulating paper of the present invention has good impregnability, and the very thin resin layer 20 structure will help to maintain the tiny gaps of the cellulose material, and the insulati...

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Abstract

The main component of the paper-based material is cellulose; the resin layer is made of epoxy resin, the paper-based material contains an amine compound, the paper-based material contains an antioxidant, and the paper-based material contains a carboxylic acid remover. The invention further discloses a liquid-immersed transformer comprising the electrical insulation paper and a preparation method of the electrical insulation paper for a transformer winding. The electrical insulation paper provided by the invention not only has mechanical characteristics, electrical characteristics, good compatibility with insulating oil and impregnation characteristics of traditional electrical insulation paper, but also has better heat resistance. Meanwhile, the transformer has good oxidation resistance and hydrolysis resistance, and is suitable for a large-capacity or small-sized liquid-immersed transformer.

Description

technical field [0001] The invention relates to the technical field of insulating materials, in particular to an electrical insulating paper used for transformer windings, a liquid-immersed transformer and a preparation method. Background technique [0002] The oil tank of the liquid-immersed transformer uses insulating oil as the insulation and cooling medium. The iron core of the transformer and the windings on the iron core are immersed in the insulating oil of the oil tank. The insulating material of the windings is usually made of cellulose insulating paper. Cellulose insulating paper is a material with tiny voids. When insulating oil is impregnated in the voids of cellulose insulating paper to form oil-paper insulation, the insulating properties of cellulose insulating paper are enhanced. [0003] Insulating oil for transformers is mainly divided into mineral oil, silicone oil, synthetic ester oil and natural ester oil according to its raw materials. Electrical insula...

Claims

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Application Information

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IPC IPC(8): H01F27/32H01F27/23H01F41/00
CPCH01F27/324H01F27/23H01F41/00
Inventor 陈于晴黄青丹黄慧红莫文雄王勇王炜刘静赵崇智宋浩永李助亚
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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