Finite Element Analysis of Thermal Problems in Gas Insulated Power Apparatus with Multiple Species Transport Technique

摘要

In this paper, multiple species transport technique is proposed to deal with the heat transfer problem of gas insulated power apparatus, in which the ambient air as well as SF_6 gas is also included in the solution region. The finite element method (FEM) is employed to investigate the coupled eddy current, fluid and thermal fields. Temperature dependent electrical and thermal material properties are considered. The convective heat transfer coefficient distribution is calculated and proved to be different along the tank surface. The proposed method is applied to the thermal analysis of both single- and three-phase bus bars and is validated by comparison with the analytical model and the experimental results reported in the literature.