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Proposed theory for streamer-to-leader-transition in non-uniform field air gaps subjected to positive switching-impulses

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1 Author(s)
H. H. Zahraee ; Dept. of Electr. Eng. & Comput. Sci., Isfahan Univ. of Technol., Iran

On the basis of a recent experimental investigation and an improved knowledge of physical processes in leader discharges, a theory is presented to permit estimation of the field required for streamer-to-leader transition at different humidities. It is clearly shown that electron-impact ionization is the main parameter for leader formation. Two predictions are made: the electric field necessary for leader formation is considerably lower than the field necessary for the first corona streamer formation (i.e., ~30 kV/cm). Secondly, this field decreases with increasing humidity

Published in:

Industry Applications Society Annual Meeting, 1993., Conference Record of the 1993 IEEE

Date of Conference:

2-8 Oct 1993