Transformer on-load adjustable capacity switch easy in realization

Abstract

The invention discloses a transformer on-load adjustable capacity switch easy in realization. The switch comprises a high voltage coil switching system and a low voltage coil switching system. The high voltage coil switching system at least comprises an angle connection vacuum arc extinguishing chamber, a start connection vacuum arc extinguishing chamber and a transition vacuum arc extinguishing chamber; the transition vacuum arc extinguishing chamber is connected to a transition resistor; when the angle connection vacuum arc extinguishing chamber is switched-on, a high voltage coil forms triangle connection; and when the star connection vacuum arc extinguishing chamber is switched-on, the high voltage coil forms star-shaped connection. According to the switch of the invention, in the star and angle switching process, the transition vacuum arc extinguishing chamber, the start connection vacuum arc extinguishing chamber and the angle connection vacuum arc extinguishing chamber only act for once and act successively; the action time of the transition vacuum arc extinguishing chamber is not limited by the action time of the other two vacuum arc extinguishing chambers; the action intervals among the vacuum arc extinguishing chambers can be set according to the arc extinguishing time demands; and the reliable arc extinguishing in the star and angle switching process can be realized through a simple mechanical mechanism.

Description

technical field [0001] The invention belongs to the technical field of transformer equipment in the electric power industry, and in particular relates to a transformer on-load capacity regulating switch that is easy to realize. Background technique [0002] At present, in the method of performing star-angle conversion on the transformer without cutting off the power supply of the transformer, there is a device that uses a vacuum interrupter and a permanent magnet mechanism. Compared with the traditional device that uses a motor left and right drive mechanism, This device has the advantages of maintenance-free and long life. [0003] During the conversion process of the device from angle to star connection, the permanent magnet mechanism needs to perform an action, and during this action, the transitional vacuum interrupter completes the "close-off" action. The vacuum interrupter needs to complete the "close-open" action, and the star-connected vacuum interrupter needs to co...

AI Technical Summary

Problems solved by technology

[0003] During the conversion process of the device from angle to star connection, the permanent magnet mechanism needs to perform an action, and during this action, the transitional vacuum interrupter completes the "close-off" action. The vacuum interrupter needs to complete the "close-open" action, and the star-connected vacuum interrupter needs to complete the "open-close" work after the corner-connected vacuum interrupter is disconnected, that is, the transitional vacuum interrupter During the closing-opening action time of the arc chamber, delta connection and star connection need to complete the conversion sequentially, and the arc extinguishing of the delta connection vacuum interrupter needs a certain time after it is closed to disconnected; moreover, due to the permanent The action of the magnetic mechanism is very fast, and the time for one action is very short. When the corner vacuum interrupter does not have time to complete effective arc extinguishing in the future, the star connection interrupter needs to be closed. During the whole switching process, its arc extinguishing The effect is not ideal

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