A UHV DC valve hall grounding switch

Abstract

The invention relates to an ultrahigh-voltage DC valve hall grounding switch, which comprises an upper part balancing device, an upper part base, a lower part balancing device, a lower part base, a lower supporting arm, an upper supporting arm, a grounding knife switch, an operating mechanism, a vertical connecting rod, a breaking support frame, a gear box device, a connecting rod and a grounding static contact, and is characterized in that the upper part balancing device is installed at the upper part of the upper part base; the grounding knife brake is installed at the lower part of the upper part base; the lower part balancing device is installed at the upper part of the lower part base; the lower supporting arm is installed at the lower part of the lower part base; one end of the upper supporting arm is installed on the lower supporting arm, and the other end is installed on the grounding knife brake; and the vertical connecting rod is installed between the operating mechanism and the gear box device. The grounding knife brake is of a side-wall mounting structure, and a conductive arm adopts a trapezoidal cross section structure. According to the invention, a two-stage balancing device is utilized, rotary movements are performed through the grounding knife switch, a moving contact is enabled to be contacted with a static contact so as to realize flow passage, the static contact is provided with a clamping spring, the contact reliability is ensured, and the structure is simple and reliable.

Description

technical field [0001] The invention belongs to the field of high-voltage equipment, in particular to a grounding switch for an ultra-high voltage direct current valve hall. Background technique [0002] In recent years, in order to further improve the efficiency of UHV DC transmission, save valuable land and corridor resources, and improve economic and social benefits, the State Grid Corporation of China plans to build ±1100kV UHV DC transmission lines, and the grounding switch of the valve hall is an important part of the construction of the converter station. As a component part, the existing grounding switch occupies a large space inside the valve hall and has a complex structure, which cannot meet the needs of the UHV DC valve hall. Contents of the invention [0003] Aiming at the problems existing in the prior art, the present invention provides a UHV DC valve hall grounding switch which has a unique structure, is stable and reliable, is convenient to operate, is eas...

AI Technical Summary

Problems solved by technology

[0002] In recent years, in order to further improve the efficiency of UHV DC transmission, save valuable land and corridor resources, and improve economic and social benefits, the State Grid Corporation of China plans to build ±1100kV UHV DC transmission lines, and the grounding switch of the valve hall is an important part of the construction of the converter station. As a component part, the existing grounding switch occupies a large space inside the valve hall and has a complex structure, which cannot meet the needs of the UHV DC valve hall

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