Jul 21 – 25, 2019
Connecticut Convention Center, Level 6
US/Eastern timezone

M3Or2A-03 [Invited]: Effect of Non-Uniformity of Electric Field on Breakdown Strength of Cryogenic Gaseous Insulation Media for Superconducting Power Applications

Jul 24, 2019, 12:00 PM
Level 6, Room 15-16

Level 6, Room 15-16


Srikar Telikapalli (florida state university)


A new experimental set up for measuring the breakdown strength of gas media in non-uniform electric field at cryogenic temperatures and high pressures is described. Measure of breakdown strength of helium gas at 77 K and 293 K in a non-uniform electric field with a field efficiency factor 62.5% are presented. The results suggest that the breakdown strength in non-uniform electric field relate to that of uniform electric field by the field efficiency factor, η. This relationship holds good for both 293 K and 77 K data. This observation expands our previously reported systematics of dielectric strength in uniform electric field to the non-uniform electric field conditions, which is important for designing HTS power applications. The established relationship eliminates the need for costly experiments for measuring the dielectric strength at a specific operating temperature and pressure and in the required non-uniformity of the electric field.

Primary authors

Srikar Telikapalli (florida state university) Martina Kvitkovicova (FAMU-FSU College of Engineering, Department of Electrical & Computer Engineering; Center for Advanced Power Systems, Florida State Univ.) Peter Cheetham (Center for Advanced Power Systems) Chanyeop Park (Georgia Tech) Dr Chul Kim (Florida State University) Lukas Graber (Georgia Institute of Technology) Sastry Pamidi (The Florida State University)

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