Residual magnetism automatic compensation device for axial magnetic vacuum arc-extinguishing chamber arc region

Abstract

The invention discloses a residual magnetism automatic compensation device for an axial magnetic vacuum arc-extinguishing chamber arc region. The residual magnetism automatic compensation device comprises an automatic detection module, an intelligent master control module, a bidirectional switch module, a coil drive module, a battery charging module, a Helmholtz coil and a battery. The residual magnetism automatic compensation device monitors a current zero point and a switch opening distance in real time by automatic detection technology, realizes the accurate compensation of the residual magnetism of the zero region by using reverse pulse magnetic field control in combination with the residual magnetism distribution of the zero region of the vacuum arc-extinguishing chamber, and obtainszero residual magnetism in the vicinity of the zero region of a vacuum switch, thereby further reducing the constraint on the residual plasma diffusion caused by the residual magnetism in the zero region and improving the switching capacity of the vacuum switch.

Description

technical field [0001] The invention belongs to the field of vacuum switches, and in particular relates to an automatic compensation device for residual magnetism in the arc area of ​​a longitudinal magnetic vacuum interrupter. Background technique [0002] With the development of vacuum switch technology, complete sets of vacuum switchgear such as solid insulated switchgear, gas insulated switchgear and air insulated switchgear have been widely used in distribution networks. The vacuum interrupter is the core component of the vacuum switch. At present, the contact structure of most vacuum interrupters adopts the longitudinal magnetic field (AMF) contact, including cup shape and coil type. When the current passes through the AMF contact, a longitudinal magnetic field is generated, which is used to regulate the vacuum arc and avoid the accumulation of arc, anode spots and local melting. This is of great significance for improving the breaking capacity and electrical life of t...

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned technical problems that the residual magnetism in the zero zone cannot be completely offset or compensated, the compensation effect is poor, and the intelligent monitoring and control is lacking, the purpose of the present invention is to provide an automatic compensation for the residual magnetism in the arc zone of the longitudinal magnetic vacuum interrupter device

Images