Abstract
Abstract
Heat is one of the most obvious characteristics of gas insulated switchgear (GIS) bus. This paper established three-dimensional eddy current field mathematical model for 126kV three-phase enclosure-type GIS bus. Magnetic field finite element method (FEM) was employed to calculate power loss in the conductors and the tank, and the result was the input data for the solution of temperature field. According to the theory of computational fluid dynamics (CFD),SF6 gas movement differential equations was given as well as solved region and boundary conditions of three dimensional fluid field. Nussle number was utilized to figure out nature convection coefficients of different segments of the bus. Solving the differential equations, fluid and temperature field distribution of the bus was calculated, which theoretically supported temperature on-line monitoring system of GIS bus.
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