Erlangen 2018 – wissenschaftliches Programm

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SYPT: Symposium Applications and New Trends of Plasmatechnology – An Overview

SYPT 2: Application and New Trends of Plasmatechnology - Part II

SYPT 2.2: Hauptvortrag

Donnerstag, 8. März 2018, 14:30–15:00, M 00.910

Discharge inception and breakdown in weakly and strongly electronegative gas in HV switchgear applications — •Martin Seeger — Senior principal scientist ABB Schweiz AG RD-P1 Segelhofstrasse 1K 5405, Baden-Dättwil, Aargau, SWITZERLAND

The control of gaseous insulation capability in HV switchgear and insulation applications is important for reliable operation of HV transmission and distribution systems. This is not only important for gaseous insulation at ambient temperatures (e.g. 300 K) but also for the insulation at elevated temperatures as they occur for example in HV circuit breakers (e.g. up to 3000 K) and switches after switching operations. Typically HV switchgear and insulation systems are operated at pressures in the range of 100 kPa to 1 MPa, which defines the main pressure range of interest. The present paper will addresses the most important physical processes, like streamer and leader transition for discharge inception and breakdown on the example of weakly and strongly electronegative gases, like CO2 and SF6, respectively. An overview of experimental investigations and simple predictive models will be given.