Year-end Sale % OFF 
Abstract
Direct-current voltages are used mainly to test equipment utilized in HV dc transmission systems, as an alternative to ac for testing cables, capacitors, insulations in which internal discharges may lead to degradation of the insulation under ac testing conditions, in investigations in discharge physics and dielectric behavior. For atmospheric air the voltage measurements under any conditions are related to the standard conditions employed in the IEC-60 standard. It is demonstrated that the IEC correction procedure is not adequate for dc voltage measurements at high altitude; for example for rod-plane gaps there is a difference >10% between experimental data obtained at 2240 m above sea level and those corrected with the IEC-60 procedure. This is mostly a consequence of the fact that the physical model employed, which is based on the field of propagation of streamers, fails to account for the combined effect of humidity and altitude. It is surmised that the propagation field of the prebreakdown streamers varies linearly with the air-density. The experimental rod-plane results obtained by the authors are better modeled by an alternative semi-empirical model.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IEEE Transactions on Dielectrics and Electrical Insulation
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
