Method for reducing dielectric loss of large-current high-voltage bushing

Abstract

The invention discloses a method for reducing the dielectric loss of a large-current high-voltage bushing, and belongs to the technical field of transformer equipment. The method for reducing dielectric loss of a large-current high-voltage bushing comprises the following steps: firstly, assembling the large-current high-voltage bushing; brushing an anti-oxidation protective agent on a silver-plated layer of a conductor of the large-current high-voltage bushing; sealing and wrapping a thin film layer, and putting the large-current high-voltage bushing into a drying oven for vacuum drying; and carrying out oiling and pressure impregnation on the large-current oiled paper condenser bushing and the like. Oxidation discoloration or falling of the silver-plated layer of the conductor on the large-current high-voltage bushing can be avoided in the vacuum drying process, so that the large-current high-voltage bushing can be integrally subjected to vacuum drying and insulation treatment after being assembled, and the dielectric loss of the large-current high-voltage bushing is effectively reduced; and the anti-oxidation protective agent is a carbon-based anti-oxidation protective agent, and the anti-oxidation protective agent can permeate into the conductor silver-plated layer, so that the surface of the conductor silver-plated layer is compact, and the anti-oxidation protection effect on the conductor silver-plated layer is achieved.

Description

technical field [0001] The invention relates to the technical field of transformer equipment, in particular to a method for reducing the dielectric loss of a high-current high-voltage 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 for reducing the dielectric loss of high-current products. [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 c...

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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%.

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