Title :
Transient Ground Potential Rise in Gas Insulated Substations - Experimental Studies
Author :
Fujimoto, N. ; Dick, E.P. ; Boggs, S.A. ; Ford, G.L.
Author_Institution :
Research Division Ontario Hydro
Abstract :
The very rapid dielectric breakdown of SF6 (eg, during the operation of disconnect switches in gas-insulated substations) generates steep-fronted travelling waves which couple to the exterior enclosure surface at the air/SF6 bushings and cause transient ground potential rise. These high voltage transients, which can be in the 100 kV range, propagate from the air/SF6 termination, along a transmission line defined by the bus enclosure and the ground plane, toward the switchgear. This paper presents a theoretical and experimental investigation of the phenomenon, from which the basic mechanisms have been identified.
Keywords :
Couplings; Dielectric breakdown; Dielectrics and electrical insulation; Gas insulation; Power system transients; Substations; Sulfur hexafluoride; Surface waves; Switches; Switchgear;
Journal_Title :
Power Apparatus and Systems, IEEE Transactions on
DOI :
10.1109/TPAS.1982.317033