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Coupled Electric-Thermal-Fluid Analysis of High Voltage Bushing

G. Eriksson1
1ABB, Corporate Research, Västerås, Sweden

Temperature (left) and electric field (right) distributions in the bushing.

Modern power transmission systems are in general designed to operate at high voltages in order to reduce resistive losses generated by high currents. This, however, tends to increase the risk for dielectric breakdown or flashovers if the equipment is not properly designed to withstand the stress. The present work illustrates how multiphysics simulations can be used to analyze and predict the electric and thermal stress on a high voltage bushing by solving a set of strongly coupled and nonlinear electric/thermal/fluid equations.

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