PARTIAL DISCHARGE CONSIDERATIONS IN GAS INSULATED SWITCHGEAR (GIS)

Michael G. Danikas - Frangiskos V. Topalis

   This paper gives an account of the possibilities of interpreting partial discharge (PD) measurements in gas insulated switchgear (GIS). As a basis for this effort is taken the well known Pedersen's model, which gives an estimate of the discharge magnitude q in terms of the streamer criterion, Cooke's considerations of electrode surface effects on gap breakdown in SF₆, as well as considerations of a known scaling law. Based on the notion of the electric field applied to the whole of the arrangement, conclusions are drawn regarding the relation of this field and the size of the defect based on PD measurements.

Keywords: gas insulated switchgear, partial discharge (PD), PD measurement

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