Title :
Simulation on branching phenomena of discharge channel in short SF6 gap under nonuniform electric field
Author :
Zheng Dianchun;Ding Ning;Shen Xiangdong;Zhao Dawei
Author_Institution :
Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin, 150080 China
Abstract :
The experimental observations indicate that streamers in short gap always exhibit irregularity and self-similarity, so the random fractal method can be applied to simulate this phenomenon. In this paper, a two dimensional stochastic streamer discharge process which combines the traditional streamer theory and fractal growth theory in non-uniform electric field under time domain is simulated to quantify the channel tortuosity of short SF6 gap. The box counting method is used to characterize the channel tortuosity and estimate the fractal dimensions of discharge channels. In addition, influences of both applied voltage and streamer channel conductivity of discharge channels are also analyzed.
Keywords :
"Discharges (electric)","Plasmas","Mathematical model","Fractals","Sulfur hexafluoride","Space charge"
Conference_Titel :
Electric Power Equipment ? Switching Technology (ICEPE-ST), 2015 3rd International Conference on
DOI :
10.1109/ICEPE-ST.2015.7368436