Method for lowering dielectric loss of large current oiled paper condenser-type busing

Abstract

The invention discloses a method for lowering the dielectric loss of a large current oiled paper condenser-type busing. The method comprises the following steps of firstly, assembling the large current oiled paper condenser-type busing, coating an electric conductor silver coating layer of the large current oiled paper condenser-type busing with an oxidation-and-discolouration prevention protection agent, then covering the large current oiled paper condenser-type busing with a thin film layer sealably, placing the large current oiled paper condenser-type busing into a dryer to be subjected tovacuum drying, and then conducting oiling and pressure impregnation on the large current oiled paper condenser-type busing. By means of the method, the dielectric loss of the large current oiled papercondenser-type busing can be lowered to 0.4% or below.

Description

technical field [0001] The invention belongs to the field of electric power equipment manufacturing, and relates to a method for reducing the dielectric loss of a high-current oil-paper capacitive bushing. Background technique [0002] In recent years, with the rapid development of transformer products and the power industry, higher requirements have been put forward for the quality of oil-paper capacitor bushing products, especially the demand for low dielectric loss of high-current oil-paper capacitor transformer bushing products is more urgent, and The manufacturing level of traditional technology cannot meet the new requirements of users. Therefore, it is particularly necessary to improve the technology of high-current products to reduce dielectric loss. [0003] Due to the limitation of the product structure, the capacitor core of the traditional high-current oil-paper capacitive transformer bushing product is cold-rolled, and the vacuum insulation process of the produc...

AI Technical Summary

Problems solved by technology

[0002] In recent years, with the rapid development of transformer products and the power industry, higher requirements have been put forward for the quality of oil-paper capacitor bushing products, especially the demand for low dielectric loss of high-current oil-paper capacitor transformer bushing products is more urgent, and The manufacturing level of traditional technology cannot adapt to the new requirements of users. Therefore, it is particularly necessary to improve the technology of high-current products to reduce dielectric loss.

[0003] Due to the limitation of the product structure, the capacitor core of the traditional high-current oil-paper capacitive transformer bushing product is cold-rolled, and the vacuum insulation process of the product is cold pumping and oil injection. The dielectric loss of the product is generally about 0.4%-0.55%. It cannot meet the user's requirement of no more than 0.4%, so it is necessary to improve its vacuum insulation treatment process. On the basis of protecting the silver-plated layer of the conductor and avoiding the oxidation and discoloration of the silver-plated layer, the dielectric loss level is controlled below 0.4%.