Title :
Numerical simulation of two-dimensional gas flow in puffer-type SF 6 circuit breaker during short current interruption
Author :
Xin, Lin ; Jianhua, Lian ; Jianyan, Xu
Author_Institution :
Dept. of Electr. Eng., Shenyang Polytech. Univ., China
Abstract :
The paper presents a model to analyze the convection-stabilized local thermodynamic equilibrium electric arc occurring in the arc-quenching chamber of puffer-type circuit breakers during a short-current interruption, which is described with the axial-symmetric Euler´s equations and coupled with a one-dimensional electric field. Employing the modified fluid in cell (FLIC) method, the gas flow has been calculated during both loading and nonloading interruption in a 550 kV two-break puffer-type circuit breaker. At the same time, the phenomenon of thermal block and back flow caused by the arc have been simulated for the sake of the analysis of effects of the arc on gas flow. Furthermore, the paper has also calculated the effects of nozzle structure on gas flow, which makes it possible to optimize the design of the breaker
Keywords :
SF6 insulation; circuit-breaking arcs; convection; gas blast circuit breakers; numerical analysis; thermodynamics; 550 kV; SF6; arc-quenching chamber; axial-symmetric Euler´s equations; back flow; convection-stabilized local thermodynamic equilibrium electric arc; design optimisation; modified fluid in cell method; nozzle structure; numerical simulation; one-dimensional electric field; short current interruption; thermal block; two-break puffer-type SF6 circuit breaker; two-dimensional gas flow; Analytical models; Cause effect analysis; Circuit breakers; Circuit simulation; Coupled mode analysis; Coupling circuits; Equations; Fluid flow; Numerical simulation; Thermodynamics;
Conference_Titel :
Power System Technology, 1998. Proceedings. POWERCON '98. 1998 International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-4754-4
DOI :
10.1109/ICPST.1998.729040
