The main circuit and the arc extinguishing chamber are connected in parallel to open and close the ultra-high voltage grounding switch of the induced current

Abstract

The invention discloses an extra-high-voltage earthing switch with shunt-wound main circuit and arc extinguishing chamber for opening and closing an induction current. The extra-high-voltage earthing switch comprises an earthing switch body and an auxiliary circuit; the earthing switch body comprises a mounting base, a porcelain bottle, a main knife switch and a main knife switch operation mechanism; the bottom end of the main knife switch is mounted on the mounting base and connected with the main knife switch operation mechanism; a main movable contact is mounted at the top end of the main knife switch; the bottom end of the porcelain bottle is mounted on the mounting base while a main static contact is mounted at the top end; the auxiliary circuit comprises a movable arc contact, a static arc contact, an arc extinguishing chamber and an arc extinguishing chamber operation mechanism; the movable arc contact is fixed on the top of the main knife switch and insulated from the main knife switch; the movable arc contact is connected with one end of the arc extinguishing chamber through a wire while the other end of the arc extinguishing chamber is connected with the arc extinguishing chamber operation mechanism; and an automatic wire take-up apparatus is arranged between the wire and the arc extinguishing chamber, and used for taking up the wire which is wound between the movable arc contact and the static arc contact and is shrunk after switching off. The extra-high-voltage earthing switch has the advantages of simple structure, reliability, capacity of opening and closing the high-parameter induction current and the like.

Description

technical field [0001] The invention mainly relates to the technical field of electric power equipment, in particular to an ultra-high voltage grounding switch in which a main circuit is connected in parallel with an arc extinguishing chamber to open and close induced current. Background technique [0002] With the development of electric power construction, the power grid continues to expand and its capacity continues to increase. In order to reduce the area occupied by the transmission corridor, the use of double-circuit parallel overhead high-voltage transmission lines on the same tower is increasing day by day, and the grounding switch for opening and closing induced currents is more and more widely used. Recently, with the massive construction of EHV and UHV power transmission and transformation projects, the number of long-distance and large-capacity transmission lines has increased, and the parameters of the induced current generated by the lines have also increased ac...

AI Technical Summary

Problems solved by technology

At present, there is no grounding switch capable of opening and closing the highest parameter induction current that meets the system requirements at home and abroad. The blank of this product makes it impossible to adopt the optimization scheme in the design of some ultra-high voltage and ultra-high voltage substation projects.

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