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Lightning impulse resistant dry-type transformer coil

A dry-type transformer, anti-lightning technology, applied in the direction of transformer/inductor coil/winding/connection, coil manufacturing, circuit, etc., can solve the problem of poor anti-lightning strike ability, to ensure safe operation, improve terminal voltage distribution, The effect of enhancing the lightning shock resistance

Inactive Publication Date: 2010-02-03
ZHENJIANG TIANLI TRANSFORMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because there is no special lightning protection design and necessary measures for the transformer coil, the lightning resistance is poor

Method used

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  • Lightning impulse resistant dry-type transformer coil
  • Lightning impulse resistant dry-type transformer coil

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Experimental program
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Embodiment Construction

[0013] A lightning shock resistant dry-type transformer coil according to the present invention includes a wire 3 , a positioning net 7 , an epoxy resin 1 with filler and a terminal block 6 . The transformer coil adopts multi-segment continuous winding, and the wire 3 is continuously wound and cast into the coil winding of the transformer. The coil winding is composed of a group of coil layer units 8, and a composite insulating layer 9 is arranged between a group of coil layer units 8. The composite insulation Layer 9 is composed of grid layer 4 and glass fiber cloth 5 . A ceramic ring 2 is provided at the end of the coil.

[0014] Wherein the grid layer 4 is made of glass ribbon weaving and pre-impregnated solvent-free epoxy resin. The grid layer 4 has a thickness of 0.5 mm, and the glass fiber cloth 5 has a thickness of 0.2 mm. The use of grid layer 4 can make resin pouring smooth, degas thoroughly, and form a good pouring structure; glass fiber cloth 5 can form a dense in...

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Abstract

The invention discloses a lightning impulse resistant dry-type transformer coil which comprises a lead, a positioning mesh, ethoxyline resin with filler and a wire holder. A coil winding comprises a group of coil layer units; a composite insulation layer is arranged among the coil layer units and comprises a grid layer and glass fiber fabrics; and the end part of the coil is provided with a ceramic ring. The composite insulation is adopted among the coil layers, and a ceramic insulation ring structure is adopted at the end part of the coil, thereby effectively strengthening the lightning impact resistance of the coil and ensuring the safe running of a transformer; and the invention is particularly suitable for the transformer used in the environment of a wind power plant.

Description

technical field [0001] The invention relates to a transformer coil, in particular to a lightning impact dry type transformer coil. Background technique [0002] With the promotion and development of wind power technology, more and more wind power transformers are put into use. Since wind power transformers are mostly used in deserts and seas, the problem of damage to transformers caused by lightning strikes is very serious. [0003] Existing wind power transformers are generally designed and manufactured according to conventional transformers, and the most easily damaged part by lightning is the coil, and the coil is the main part of the transformer. In the prior art, the transformer coil is composed of wires, positioning nets, epoxy resin with fillers and joints. The coil winding adopts a segmented multi-layer structure, the coil winding is formed by winding and pouring a group of wire coil segment units, and each coil segment unit is composed of a group of coil layer uni...

Claims

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Application Information

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IPC IPC(8): H01F27/28H01F27/32H01F41/12H01B3/00
Inventor 谢余江赵文波
Owner ZHENJIANG TIANLI TRANSFORMER