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�������պ����ѧѧ�� 2009, Vol. 35 Issue (5) :576-579    DOI:
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Model of stepped leader current for simulation of lightning
Liu Ning, Xiao Chunyan*
School of Automation Science and Electrical Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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Abstract�� Model of stepped leader current is the basis of lightning movement simulation and strike analysis, and it is indispensable for lightning protection design, theoretical research of shielding failure for transmission lines, etc.. Physical model of stepped leader was given, which includes a main channel and a tip. Current model of stepped leader was also given, which well simulates the stepwise propagation of lightening and charge change properties of stepped leader-s tip. Electric field on the ground level produced by stepped leader was derived and calculated by charge simulation method and dipole technique, and its simulation results show that the average electric field peaks and time interval between stepped leader pulses of far-zone field agree well with the measured data. The close fields under different return strike current peaks also agree with the measurements of triggered-lightning.
Keywords�� lightning   stepped leader   current model   discharge   electric fields     
Received 2008-08-10;
Fund:

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About author: �� ��(1983-),��,�ӱ�������,˶ʿ��,liuningxx@gmail.com.
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�� ��, Ф����.�׵��ݼ��ȵ�ͨ������ģ��[J]  �������պ����ѧѧ��, 2009,V35(5): 576-579
Liu Ning, Xiao Chunyan.Model of stepped leader current for simulation of lightning[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2009,V35(5): 576-579
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