Title :
The role of initiatory electrons in highly nonuniform field breakdown
Author :
Qiu, X.Q. ; Chalmers, I.D.
Author_Institution :
Centre for Electr. Power Eng., Strathclyde Univ., Glasgow, UK
Abstract :
The effect of initiatory electrons in SF6 and mixtures of SF6 with N2 and SF6 with air has been studied by varying the population of free negative ions. It has been found for all gases studied that the dielectric strength of the gas is a decreasing function of the ion population although it appears that there is something of a saturation effect in that as the ion population is increased, the breakdown strength becomes progressively less sensitive to further increase in the ion density
Keywords :
SF6 insulation; electric breakdown; electric strength; gas mixtures; impulse testing; insulation testing; ion density; nitrogen; SF6; SF6-N2; SF6-N2 mixture; SF6-air mixture; breakdown strength; dielectric strength; free negative ions; highly nonuniform field breakdown; impulse breakdown voltage; initiatory electrons role; ion density; ion population; saturation effect; Additives; Breakdown voltage; Corona; Dielectric breakdown; Dielectric measurements; Electric breakdown; Electrodes; Electrons; Power engineering; Sulfur hexafluoride;
Conference_Titel :
Electrical Insulation, 1998. Conference Record of the 1998 IEEE International Symposium on
Conference_Location :
Arlington, VA
Print_ISBN :
0-7803-4927-X
DOI :
10.1109/ELINSL.1998.704728
