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Coil insulation structure

A technology of coil insulation and insulating spacer, applied in the field of transformers, can solve the problems of reducing the insulation performance of transformers, partial discharge phenomenon, etc., and achieve the effect of improving insulation reliability

Inactive Publication Date: 2017-09-15
闫会云
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the transformer with the above-mentioned transformer coil end insulation structure is placed in the transformer oil tank containing transformer oil 51, there will always be air or air bubbles in the "wedge-shaped" gap due to various reasons, so that the bottom of the insulating spacer 11 An "oil wedge" will be formed between the circular arc connection section 31 of the voltage equalizing electrostatic ring 21, that is, the transformer oil 51 cannot penetrate the "wedge-shaped" gap, so that the maximum field strength will appear in the "oil wedge" area, making The initial discharge voltage of partial discharge in the "oil wedge" area is lower than that of other areas, and the "oil wedge" area is prone to partial discharge, thereby reducing the insulation performance of the entire transformer

Method used

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  • Coil insulation structure
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Embodiment Construction

[0009] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0010] Attached below figure 2 The present invention is described further with embodiment.

[0011] Such as figure 2 As shown, the coil insulation structure includes: a voltage equalizing static ring 2 with a smooth circular arc connection section 3 at the end, an insulating pad 1 is arranged above the straight line section 4 of the voltage equalizing static ring 2, and an insulating pad The outer end of the block 1 does not extend beyond the straight ...

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Abstract

The invention relates to a coil insulation structure, comprising: a voltage equalizing static ring whose end is a smooth circular arc connection section, an insulating pad is arranged above the straight line section of the voltage equalizing static ring, and the outer end of the insulating pad does not extend beyond the uniform Outside the straight segment of the piezoelectric ring. The invention has the advantage of improving the insulation reliability of the whole transformer.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to a coil insulation structure. Background technique [0002] At present, the end insulation structure of the coil of a large transformer such as a power transformer with a voltage higher than 110KV is as follows: figure 1 As shown, the end of the voltage equalizing electrostatic ring 21 is a smooth circular arc connection section 31, and an insulating pad 11 is arranged above the straight line section 41 of the voltage equalizing electrostatic ring 21, and the outer end of the insulating pad 11 extends through the voltage equalizing electrostatic ring The straight line segment 41 of 21 is located above the circular arc connecting segment 31 behind, so that a "wedge-shaped" gap is formed between the insulating spacer 11 and the circular arc connecting segment 31 of the voltage equalizing static ring 21 . When the transformer with the above-mentioned transformer coil end insula...

Claims

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Application Information

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IPC IPC(8): H01F27/32H01F27/40
CPCH01F27/324H01F27/402
Inventor 闫会云
Owner 闫会云