Domain Coupling of Multi-Physical Parameters for EHV SF6 Circuit Breaker
Coupling of multi physical parameters in extra high voltage SF6 circuit breaker (EHV SF6 CB) has been investigated. A 2D combined mathematical model of electric field, flow field and ε − k turbulent flow was developed, and the coupling condition of multi physical field of CB was established. And the computation has been carried out for a 500kV 1-break SF6 CB. The multi physical parameters and the electrical characteristics varying with the interrupting course have been investigated. In addition, the dielectric recovery characteristics (DRC) of the 500kV 1-break SF6 CB has been obtained, and the visualization of the breaking course has been realized. Keywords-coupling field, domain decomposition, numerical simulation, puffer CB