Device for preventing moisture diffusion inside oil immersed transformer

Abstract

The present application discloses a device for preventing moisture diffusion inside an oil immersed transformer for absorbing moisture inside the oil immersed transformer, which comprises a moisture absorbing layer and a metal shielding mesh, wherein the moisture absorbing layer is disposed at the bottom of the transformer and located in the transformer, and can absorb the moisture inside the transformer to prevent the moisture from diffusion in a large range to affect the insulation performance inside the transformer; the moisture absorbing layer is made of a moisture-absorbing color-changingmaterial, and the moisture absorption situations of the moisture absorbing layer can be marked out through the color changing degree of the moisture-absorbing color-changing material; when during maintenance, the sealing and wetting situations of the transformer can be judged according to the color changing situations of the moisture-absorbing color-changing material; the metal shielding mesh isarranged on the moisture absorbing layer; and the metal shielding mesh is used for electric shielding. The device for preventing moisture diffusion inside the oil immersed transformer has simple structure and convenience for use, can be mounted in combination with transformer manufacturing, returning to factory for repair, on-site lifting cover inspection and the like, and does not affect the normal operation of the transformer.

Description

technical field [0001] The present application relates to the field of transformers, in particular to a device for preventing moisture diffusion inside an oil-immersed transformer. Background technique [0002] Transformers are key equipment in the power grid. During the operation of the power grid, the seal failure of the transformer bushing and the damage of the oil conservator capsule may occur from time to time; in addition, the transformer body will be dried and the installation process control and other factors will leave moisture, which will easily cause the accumulation of moisture inside the transformer, which is not conducive to Transformer operation. [0003] On the one hand, driven by the oil flow of the transformer and affected by the increase of oil temperature, the diffusion of moisture inside the transformer is accelerated, and the diffusion of moisture will reduce the insulation performance inside the transformer, thereby inducing partial discharge inside t...

AI Technical Summary

Problems solved by technology

During the operation of the power grid, the seal failure of the transformer bushing and the damage of the oil conservator capsule may occur from time to time; in addition, the transformer body will be dried and the installation process control and other factors will leave moisture, which will easily cause the accumulation of moisture inside the transformer, which is not conducive to Transformer operation

[0003] On the one hand, driven by the oil flow of the transformer and affected by the increase of oil temperature, the diffusion of moisture inside the transformer is accelerated, and the diffusion of moisture will reduce the insulation performance inside the transformer, thereby inducing partial discharge inside the transformer, causing transformer damage

[0004] On the other hand, the accumulation of moisture inside the transformer will easily cause the insulation performance of the transformer core to ground to decrease.

[0005] Therefore, during the operation of the power grid, due to moisture entering the inside of the transformer, it will generally cause problems such as chromatographic abnormality of the transformer due to dampness, and degradation of the insulation performance of the core to the ground; in severe cases, it will cause damage to the transformer, which will lead to grid failure and large-scale power outages

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