Development of a thermally and chemically non-equilibrium model for decaying SF6 arc plasmas

摘要

This paper describes the development of a model with both chemically and thermally non-equilibrium effects in an SF6 arc plasma during decaying phase with transient recovery voltage (TRV) application. The SF 6 arc plasma in decaying phase can be seen in a high voltage SF 6 gas circuit breaker during a large current interruption process. The TRV is often applied to the arc plasma, which may elevate the electron temperature Te than heavy particle temperature Th. This developed model solves energy equations for electrons and heavy particles, accounting for totally 122 reactions due to 19 species in SF6 arc plasmas. As a result, transient distributions of Te and Th were calculated for SF6 arc plasma in a TRV application condition for a fundamental study. © 2013 IEEE.