High voltage outgoing line device of extra-high voltage transformer

Abstract

The invention discloses a high voltage outgoing line device of an extra-high voltage transformer, which comprises a high voltage outgoing line, wherein the high voltage outgoing line which is led out from a high voltage winding firstly penetrates from the horizontal end portion of an upwards bent equalizing pipe and then is bent to the vertical end portion of the equalizing pipe, finally the highvoltage outgoing line is partially led out from high voltage branch pipe oil after passing through an equalizing ball connected with the vertical end portion of the equalizing pipe, and the high voltage outgoing line is provided with an electric potential connecting line in the equalizing ball for being connected with the equalizing ball. The high voltage outgoing line device of the extra-high voltage transformer is characterized in that the connection between the vertical end portion of the equalizing pipe and the equalizing ball is realized through a metal screw bolt with self-locking function, the connection between the electrical potential connecting line and the equalizing ball is also realized through a metal screw bolt with self-locking function, multiple layers of insulation screen separating oil clearances are arranged on the equalizing pipe and the equalizing ball, and an insulation support is positioned in each oil clearance.

Description

technical field [0001] The invention relates to a high-voltage outlet device of an ultra-high voltage (1000kV and above) transformer. Background technique [0002] The high-voltage outlet device of the transformer is an insulating structure that connects the high-voltage end lead-out wire of the transformer high-voltage winding and the high-voltage bushing oil. The overall structure composed of components has good electrical insulation performance, and is an important part of the main insulation structure of ultra-high voltage transformers and UHV transformers. [0003] In the traditional transformer high-voltage outgoing line device, the equalizing tube and the equalizing ball are welded together, and the potential connection between the high-voltage winding lead-out line and the equalizing ball is also welded, which has poor operation process and poor reliability. It is difficult to clean up the welding slag, which will cause internal pollution and cause the risk of parti...

AI Technical Summary

Problems solved by technology

[0003] In the traditional transformer high-voltage outgoing line device, the equalizing tube and the equalizing ball are welded together, and the potential connection between the high-voltage winding lead-out line and the equalizing ball is also welded, which has poor operation process and poor reliability. It is difficult to clean up the welding slag, which will cause internal pollution and cause the risk of partial discharge in the high-voltage outlet device

In addition, the number and size of oil gaps separated by the pressure equalization tube and the outer insulation barrier of the pressure equalization ball cannot meet the insulation requirements of 1000kV and above UHV transformers

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