Gaseous Dielectrics VIII pp 489-495 | Cite as
Electrical Surface Discharges on Wet Polymer Surfaces
Abstract
This paper tackles the problem of the influence of water droplets on the surface of HV insulators on the electric field distribution. During the lifetime of such a high voltage component, the surface of the solid insulation is very often stressed with layers of water droplets. These droplets tend to deform the electric field. Local field enhancements ensue. Field forces causing a deformation of the droplets may be produced as well as surface discharges starting from these droplets. Chemical deterioration of the insulator surface may follow.
The present paper offers an overview on the formation of such surface discharges and of their influence on the deterioration of the polymer surface. the sort of the described phenomena can be observed in both indoor and outdoor insulation. the importance of different parameters, e.g. discharge intensity and repetition rate, of the surface discharges on the deterioration of the polymer surface is also emphasized. Additionally it is shown that field inhomogeneities, caused by droplets on a polymer surface, can be estimated by using a numerical calculation program.
Keywords
Water Droplet Polymer Surface Electric Field Distribution Insulator Surface Surface DischargePreview
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