The temperature effect to the compound electric field distribution of oil-paper insulation

This paper adopts a typical double-layer oil-paper insulation structure model, and obtains the mathematical expression of electric field distribution of oil-paper composite insulation. On the basis of the mathematical expression of the electric field distribution of oil-paper combination insulation, the numerical calculation results of the electric field distribution of oiled paper composite insulation are obtained. It is found that the temperature has little effect on the field strength distribution in transformer oil and paperboard under high AC content, and the temperature is low in low AC content. It has a great influence on the distribution of field strength in oil-paper insulation, especially the field strength in transformer oil.