Abstract：Plug-bushing inner and external insulation structure both effect the electrical field distribution. This paper mainly focus on external insulation of bushing. By means of classic formula we known that several factors influence the electric field strength of the plug-bushing. With the ANSYS simulation software, we built different models in different conditions. Then we simulated all this electric field, making a distinction and variation between different dielectric mediums such as epoxy resin and air. Finally, selecting a typical mould for trial-produce. Results showed that electric field of ANSYS simulation can give a guide of partial discharge analysis; test results also proved that bushing sample with increased earth-shielding-screen can improve PD in a certain degree.
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2014, Vol. 15 
