Pneumatic transformer fault oil drainage system

Abstract

The invention relates to a pneumatic opening scheme of a transformer fault oil drainage pipeline. A pneumatic valve, a bursting disc assembly and a pneumatic control system are included; when a transformer has a serious fault and needs to drain oil, a bursting disc is opened at first through the pneumatic control system; then, the pneumatic valve is opened; remote manual or electric transformer oil drainage in a security area is realized; simultaneously, the pneumatic control system can open the pneumatic valve arranged on a flame retardant gas pipeline so as to inject flame retardant gas intothe transformer; therefore, fire protection and fire fighting are realized; simultaneously, oil conservator cut-off and directional oil drainage also can be realized; meanwhile, necessary conditionsof light detection and pressure detection of transformer fault oil drainage and nitrogen injection are increased; and the scheme solves the problems that the existing equipment cannot perform securityoil drainage when the transformer is dangerous, the existing oil drainage and nitrogen injection system is unreliable to start and the like.

Description

Technical field [0001] The invention relates to a pneumatic oil drain system for transformer failure, which belongs to the field of power equipment safety. Background technique [0002] According to the power system specifications, when a major failure occurs in a large-scale transformer and there is a risk of combustion, the insulating oil inside the transformer should be quickly discharged to the accident oil storage tank. However, in the current network operation equipment and substation design, the accident drain pipeline of the transformer is opened by manual gate valve and manually broken glass sealing sheet to open the accident drain. When the transformer is at risk of burning, the operator has to risk his life to open the valve and break the glass. If the transformer is already burning, it is usually no longer possible to discharge oil, and the transformer can only be burned and exploded. In order to solve this risk problem, the transformer management unit adopted a valv...

AI Technical Summary

Problems solved by technology

However, in the design of current equipment and substations in operation on the grid, the emergency oil discharge pipeline of the transformer is opened by manual gate valves and manually broken glass seals.

When the transformer is at risk of burning, the operator has to risk his life to open the valve and break the glass. If the transformer has burned, it is usually impossible to discharge oil, and the transformer can only be burned and exploded.

In order to solve this risk problem, the transformer management unit has adopted the method of leading the transformer oil discharge pipeline to the other side of the firewall to set up a valve to reduce the risk of opening the valve when the transformer burns, but there is still no reliable solution for the glass sealing plate at the entrance of the oil storage tank. control break

In addition, the current oil discharge and nitrogen injection system used in the power grid system also has problems such as poor operation reliability and high risk of misoperation due to the fact that the actuators are mostly mechanical interlocking and electronic control. Discharge the transformer oil directly after starting, causing accidents and having a huge impact

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