Authors : Dib Djalel , Haddouche Ali and Chemam Faycal
Abstract: We present in this study an analysis of the electromagnetic coupling between an external electromagnetic field generated by the lightning and an electrical network of which the objective to put a significant plus in the evaluation of the one of the most dangerous constraints on the electric power lines. So that our analysis takes an important and original aspect, we will be based on our experimental measurements which we carried in the high voltage laboratories of EPFL in Switzerland during the first quarter 2006 and on the recent works already of other authors. When a lightning strike falls near an overhead power line, the intense electromagnetic field radiated by the current of the lightning return stroke there induced transient overvoltages, which can cause a back-flashover in electrical network. The indirect lightning represents a significant menace owing to the fact that it is more frequent than that which results from the direct strikes. A new particular analytical expression of the electromagnetic field generated by the lightning return stroke was developed and presented in this study.
Dib Djalel , Haddouche Ali and Chemam Faycal , 2007. Aggression on the Electric Networks by the External Electromagnetic Fields. International Journal of Electrical and Power Engineering, 1: 114-121.