Title :
The corona inception under negative impulse voltage in inhomogeneous fields
Author :
Diaz, R.R. ; Ruhling, F. ; Heilbronner, F. ; Ortega, P.
Author_Institution :
Inst. of Electr. Eng., Nat. Univ. of Tucuman, Argentina
Abstract :
The characteristics of the negative corona inception are discussed. A simplified statistical model applied to calculate the distribution of inception voltage in divergent fields is adjusted to a 1 m airgap with convergent field. The influence of the air humidity, ion density, electrode material and surface roughness are examined. An interpretation of the corona inception in convergent fields, based on the presence of negative ions and surface protrusions, is proposed
Keywords :
air insulation; 1 m; air humidity; convergent field; electrode material; inception voltage distribution; inhomogeneous electric fields; ion density; negative corona inception characteristics; negative impulse voltage; negative ions; simplified statistical model; surface protrusions; surface roughness;
Conference_Titel :
High Voltage Engineering, 1999. Eleventh International Symposium on (Conf. Publ. No. 467)
Conference_Location :
London
Print_ISBN :
0-85296-719-5
DOI :
10.1049/cp:19990723
