Experimental studies of streamer diameters and velocities in dielectric liquid with positive and negative polarity

Abstract

A streamer in dielectric liquid (transformer oil) is consist of charged particles (electron, positive and negative ion). It has many properties such as: streamer velocity, streamer diameter, mean electron energy, number of streamers branches and current density. Some of these properties have been detected by using the photographic technique to get a data and it should be in a good agreement with theoretical and experimental results. The streamers diameters and streamers velocity are increased with voltage.