Title :
Laser-guided discharges in long gaps
Author :
Shindo, Takatoshi ; Miki, Megumu ; Aihara, Y. ; Wada, Atsushi
Author_Institution :
Central Res. Inst. of Electr. Power Ind., Tokyo, Japan
fDate :
10/1/1993 12:00:00 AM
Abstract :
Experiments to guide electric discharges with a chain of air breakdown plasmas (plasma channel) produced by a laser were carried out for use in power system protection applications. Electric discharges were guided up to 4.5m with a high power CO2 laser focused by a 10m focal length mirror. Unusual 50% flashover voltage characteristics were obtained and the mechanism on the laser-guided discharge is shown. Experiments of laser-guided discharge in fog or rain were also carried out to clarify the effects of precipitation on the guiding characteristics, and the results are analysed quantitatively
Keywords :
electric breakdown of gases; flashover; gas lasers; laser beam applications; lightning protection; power system protection; 10 m; 4.5 m; CO2; air breakdown plasmas; flashover voltage characteristics; fog; guiding characteristics; laser-guided discharge; long gaps; mirror; plasma channel; power system protection; precipitation; rain; Density measurement; Electric breakdown; Flashover; Laser theory; Lightning; Plasma properties; Pollution measurement; Power lasers; Power transmission; Rain;
Journal_Title :
Power Delivery, IEEE Transactions on
