The Insulation Properties of Oil-Impregnated Insulation Paper Reinforced with Nano-TiO2

Abstract EN

Oil-impregnated insulation paper has been widely used in transformers because of its low cost and desirable physical and electrical properties.

However, research to improve the insulation properties of oil-impregnated insulation paper is rarely found.

In this paper, nano-TiO2 was used to stick to the surface of cellulose which was used to make insulation paper.

After oil-impregnated insulation paper reinforced by nano-TiO2 was prepared, the tensile strength, breakdown strength, and dielectric properties of the oil-impregnated insulation paper were investigated to determine whether the modified paper had a better insulation performance.

The results show that there were no major changes in tensile strength, and the value of the breakdown strength was greatly improved from 51.13 kV/mm to 61.78 kV/mm.

Also, the values of the relative dielectric constant, the dielectric loss, and conductivity declined.

The discussion reveals that nano-TiO2 plays a major role in the phenomenon.

Because of the existence of nano-TiO2, the contact interface of cellulose and oil was changed, and a large number of shallow traps were produced.

These shallow traps changed the insulation properties of oil-impregnated insulation paper.

The results show that the proposed solution offers a new method to improve the properties of oil-impregnated insulation paper.