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http://dx.doi.org/10.5207/JIEIE.2008.22.9.032

Analysis of Soil lonization Characteristics in Concentric Cylindrical Electrode System under Impulse Voltages  

Kim, Hoe-Gu (인하대학교 IT공대 전기공학부)
Park, Geon-Hun (인하대학교 IT공대 전기공학부)
Lee, Bok-Hee (인하대학교 IT공대 전기공학부)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.22, no.9, 2008 , pp. 32-39 More about this Journal
Abstract
This paper presents the soil ionization phenomena and the parameters with the transient characteristics of model grounding system under lightning impulse voltages. lonization properties of dry and wet sands were investigated by using two test cells of concentric cylindrical electrode system with different dimensions. As a result non-linear electrical behavior of sand under high impulse voltage is caused by ionization process. The transient impedance of sand depends not only on the water content but also on the magnitude of applied impulse voltages. The grounding impedance is decreased with increasing the water content and the magnitude of a lied voltages. The results resented in this paper will provide useful information on the design of high performance grounding systems against lightning surge.
Keywords
Soil Ionization; V-I Curve; Soil Resistivity; Impulse Voltage; Transient Grounding Impedance;
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