Lightning-induced overvoltages transferred from medium-voltage to low-voltage networks

Simulation results relevant to realistic configurations of medium-voltage (MV) and low-voltage (LV) distribution systems provide useful information to evaluate both the expected level of power quality problems on LV networks due to lightning and the benefits achievable by a proper installation of protection devices. The paper describes a procedure to evaluate lightning overvoltages induced on MV lines by lightning strokes hitting the ground on the line vicinity and that are transferred through the MV-LV transformer on the LV network. To show how the high-frequency model of the transformer play a crucial role in the simulation of transferred overvoltages, the paper presents the results obtained by using two different models identified by means of laboratory measurements.

Published in:
2005 IEEE Russia Power Tech, PowerTech, null, null, null
Department of Electrical Engineering, University of Bologna, Italy CYME International T and D, Canada
Conference code: 73241
Export Date: 25 April 2012
Source: Scopus
Art. No.: 4524738
doi: 10.1109/PTC.2005.4524738
Language of Original Document: English
Correspondence Address: Borghetti, A.; Department of Electrical Engineering, University of BolognaItaly
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Scopus: 2-s2.0-51549103282

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