On the effect of the finite ground conductivity on electromagnetic field radiated by lightning to tall towers
2006 (English)In: International Conference on Lightning Protection ICLP, 2006, 267-272 p.Conference paper (Refereed)
In this paper it is shown how the finitelyconducting ground modifies the signature of the radiationfield of return strokes striking tall towers. Results arepresented for different tower heights and for differentground conductivities varying the current risetime in thereturn stroke model. The results show that the attenuationof the initial peak of the radiation field resulting from thepropagation over finitely conducting ground dependsstrongly on the current risetime, the tower height and theground conductivity. In general, the attenuation of theradiation field of lightning flashes striking tall towers islarger than that striking flat ground. In the case where theground conductivity is extremely poor, namely 0.0001 S/m,the attenuation of the peak radiation field may reach asmuch as 70% in the case of lightning flashes striking a 300-m tall tower.
Place, publisher, year, edition, pages
2006. 267-272 p.
, International Conference on Lightning Protection, 28
Electromagnetic fields, lightning to tall towers, numerical modeling
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-74338ISBN: 4-9902110-2-2OAI: oai:DiVA.org:kth-74338DiVA: diva2:489417
28th International Conference on Lightning Protection, ICLP 2006. Kanazawa, Japan. 18-22 September 2006
QC 201205302012-02-022012-02-022012-05-30Bibliographically approved