Epoxy resin impregnated glass fiber extra-high voltage alternating current transformer bushing and production method thereof

Abstract

The invention belongs to the technical field of extra-high-voltage alternating-current transformer bushings, and particularly relates to an epoxy resin impregnated glass fiber extra-high-voltage alternating-current transformer bushing and a production method.The epoxy resin impregnated glass fiber extra-high-voltage alternating-current transformer bushing comprises a mounting plate, fixing plates are fixedly connected to the two sides of the top of the mounting plate, and a groove is formed in the middle of the top of the mounting plate; and a mounting mechanism is fixedly connected in the groove. According to the epoxy resin impregnated glass fiber extra-high-voltage alternating-current transformer bushing and the production method, the transformer bushing is well protected through the arranged mounting mechanism, the primary curing process of a bushing core is promoted by winding epoxy resin impregnated glass fibers at high temperature and controlling stepped temperature change, and the production efficiency is improved. The reasonable distribution of the sleeve field intensity is realized, and the accumulated error in the actual winding process is reduced; the epoxy resin impregnated glass fiber extra-high voltage alternating current transformer bushing vertical installation tool is designed, and the assembling efficiency of the extra-high voltage impregnated glass fiber transformer bushing is improved.

Description

technical field [0001] The invention relates to the technical field of UHV bushing development, in particular to an epoxy resin impregnated glass fiber UHV AC transformer bushing and a production method. Background technique [0002] At present, the UHV AC transformer bushings used in UHV AC projects in my country basically use imported oil-impregnated paper bushings, but the operating conditions in recent years have shown that discharge, gas production, leakage, and joint heating occur in the oil-impregnated paper bushings. Issues such as potential oil leakage, explosion and combustion risks, major fire accidents in the grid-side bushing of the UHV converter transformer at Tianshan Station, and burst failure of the grid-side bushing of the UHV converter transformer at Yibin Station have seriously affected the safety of the power grid. stability, resulting in huge economic losses, and the problems of UHV AC transformer bushing import substitution and reliability improvement ne...

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Problems solved by technology

[0003] The technical difficulties of using this process are: (1) The winding temperature of epoxy resin impregnated glass fiber will affect the initial curing process of the casing core. If the temperature control is not good, the casing core will be delaminated during post-curing Problem; (2) The design of the length and thickness of the capacitive screen of the bushing core body of the epoxy resin impregnated glass fiber UHV AC transformer will affect the field strength distribution of the bushing, and it is difficult to control the field strength inside the bushing; (3) Epoxy resin The impregnated glass fiber UHV AC transformer bushing core is long in size and heavy in weight, and it is difficult to accurately install it with the bushing flange and hollow composite jacket; (4) The existing transformer bushings are not fixed after use. Place the base, it is easy to damage the transformer bushing, and it cannot protect the transformer bushing well

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