Title :
Behaviour of positive conductor-rod gaps stressed by impulse voltages in atmospheric air
Author :
Gourgoulis, D.E. ; Mikropoulos, P.N. ; Stassinopoulos, C.A. ; Yakinthos, C.G.
Author_Institution :
Dept. of Electr. & Comput. Eng., Aristotelian Univ. of Thessaloniki, Greece
fDate :
9/1/1997 12:00:00 AM
Abstract :
Results were obtained and evaluated so as to investigate the influence of various parameters on the breakdown mechanism of a 50 cm positive conductor-rod gap under impulse voltages. For such a gap it was found that several parameters affect its breakdown characteristics, notably humidity, waveshape of the applied impulse, diameter of the energised conductor and position of the earthed rod with respect to the conductor. Breakdown probability curves have been established, gap factors computed and their dependence on the aforementioned parameters investigated. Finally, the paths taken by the spark channel have been studied. Based on the information gained several suggestions concerning the breakdown mechanism are proposed
Keywords :
air gaps; overvoltage; power system transients; 50 cm; atmospheric air; breakdown mechanism; breakdown probability curves; earthed rod position; energised conductor diameter; gap factors; gap geometry; humidity effect; impulse voltage stressed; impulse waveshape effect; positive conductor-rod gaps; spark channel; sparkover voltage; streamer lengths;
Journal_Title :
Science, Measurement and Technology, IEE Proceedings -
DOI :
10.1049/ip-smt:19971250
