Ultra/extra high-voltage gas insulated transformer type bushing with explosion-proof and disaster-reducing function

Abstract

The invention belongs to the field of electrical insulation structure design and optimization design of ultra/extra high-voltage AC and DC power transmission equipment, and particularly relates to anultra/extra high-voltage gas insulated transformer type bushing with an explosion-proof and disaster-reducing function. The ultra/extra high-voltage gas insulated transformer type bushing includes a gas insulated bushing, an isolation buffer gas chamber connecting the gas insulated bushing to a transformer oil tank, and a shield ring at the end of the bushing. Insulated isolation supports are installed at both ends of the isolation buffer gas chamber. When the internal discharge inside the bushing causes the insulation isolation support on the bushing side to fracture, the isolation buffer gaschamber can achieve a buffer effect, prevent the gas from entering the transformer, stops the transformer oil from entering the fault bushing, reduces the combustion and explosion probability of thebushing and the transformer, and improves the safety and the reliability of the bushing and transformer.

Description

technical field [0001] The invention belongs to the field of electrical insulation structure design and optimization design of super / ultra-high voltage AC and DC power transmission equipment, and in particular relates to an ultra / ultra-high voltage gas-insulated transformer bushing with explosion-proof and disaster-reducing functions. Background technique [0002] Bushing failure is one of the important causes of transformer fires. Although the probability of transformer bushing fires is low, once a fire occurs for some reason, it often causes great damage to the transformer, and even causes damage to adjacent transformers and other electrical equipment. damage, seriously endangering the safe and stable operation of the substation. In the previous cases of transformer fire accidents, the discharge of the bushing tie rod system, the discharge of the porcelain bushing under the bushing, and the discharge of the outlet device in the raised seat are all typical sources of discha...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems existing in the existing design, and to provide an EHV / UHV gas-insulated transformer bushing with explosion-proof function. When the discharge causes damage to the insulating isolation support of the basin-type insulator on the bushing side, the insulating isolation support on the transformer side can effectively prevent the transformer oil from flowing into the gas chamber, and at the same time prevent the gas in the bushing from entering the transformer, reducing the possibility of arc ignition of the transformer oil , reduce the probability of bushing and transformer explosion due to internal discharge of the bushing, thereby improving the safety and reliability of EHV / UHV AC and DC bushings and transformers in operation

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