Title :
Numerical calculation of interruption properties of the self-extinguishing type SF6 circuit breaker during small current interruption
Author :
Xin, Lin ; Junmin, Li ; Jianyuan, Xu ; Chenghan, Yang
Author_Institution :
Dept. of Electr. Eng., Shenyang Univ. of Technol., China
fDate :
9/1/2001 12:00:00 AM
Abstract :
This paper describes the gas flow properties in the arc chamber and the dielectric recovery after current zero in a self-extinguishing type SF6 circuit breaker during small current interruption. First, employing the modified fluid-in-cell method and the movable mesh technique, the gas flow characteristic in the are chamber is calculated during the small current interruption, and secondly, the static electrical field is computed by using the finite element method. Combined with the calculation of above, this paper calculates the dielectric strength recovery after current zero and estimates the capability of small current interruption using the streamer theory of gas breakdown
Keywords :
SF6 insulation; circuit-breaking arcs; electric breakdown; electric strength; finite element analysis; SF6; arc chamber; dielectric strength recovery; finite element method; fluid-in-cell method; gas breakdown; gas flow; movable mesh technique; numerical simulation; self-extinguishing SF6 circuit breaker; small current interruption; static electric field; streamer analysis; Automation; Circuit breakers; Dielectric breakdown; Engine cylinders; Fluid flow; Manufacturing industries; Numerical analysis; Power systems; Springs; Valves;
Journal_Title :
Magnetics, IEEE Transactions on
