Title :
Comparison of PD phenomena in pure SF6 and N2-SF6 mixtures
Author :
Meijer, Sander ; Pharmatrisanti, A. ; Gulski, Edward ; Smit, Johan J. ; Girodet, Alain
Author_Institution :
High Voltage Lab., Delft Univ. of Technol., Netherlands
Abstract :
Recently the research in breakdown and PD phenomena in pure SF6 and gas mixtures is intensified due to a growing interest in the use of gas mixtures. In particular gas mixtures can be a very interesting substitute for pure SF6 in large gas insulated systems, such as gas insulated lines. In this paper investigations on PD phenomena and breakdown voltages, performed in SF6-N2 mixtures containing 5% and 10% and pure SF6, are presented. To make this comparison the influence of the test voltage and gas pressure was studied for different types of PD sources, such as protrusions and free moving particles. It is shown that differences can be observed in phase-resolved PD patterns, PD magnitude, UHF spectra and breakdown voltage
Keywords :
SF6 insulation; electric strength; gas mixtures; nitrogen; partial discharges; N2; N2-SF6; PD magnitude; PD phenomena; SF6; UHF spectra; breakdown strength; breakdown voltages; free moving particles; gas insulated lines; gas mixtures; gas pressure influence; inception voltage; large gas insulated systems; phase-resolved PD patterns; protrusions; test voltage influence; Computational geometry; Conductors; Dielectric breakdown; Electric breakdown; Equations; Gases; Geographic Information Systems; Steel; Testing; Voltage;
Conference_Titel :
Electrical Insulation, 2000. Conference Record of the 2000 IEEE International Symposium on
Conference_Location :
Anaheim, CA
Print_ISBN :
0-7803-5931-3
DOI :
10.1109/ELINSL.2000.845515
