Field optimization of an HVDC-GIS-spacer

摘要

The paper deals with the optimization of a spacer for HVDC-Gas-Insulated-Substations (GIS) by means of 2D-axisymmetric field calculation.For high voltage DC conditions the field is mainly controlled by the conductivity k of the insulation material. Therefore investigations on the influence of volume and surface resistivity on the field distribution of the spacer are made. The fielddistribution can l)e improved by a certain resistivity. In addition to the calculations with a constant resistivity of the whole spacer surface, computations with varying resistivities have been made, leading to an even better field distribution. Theinfluence of volume resistivity are also investigated and discussed.