Title :
Comparison of circuit models for the simulation of soil ionization
Author :
Nicolopoulou, E.P. ; Asimakopoulou, F.E. ; Gonos, I.F. ; Stathopulos, I.A.
Author_Institution :
High Voltage Lab., Nat. Tech. Univ. of Athens, Athens, Greece
Abstract :
The main characteristic of the transient behaviour of a grounding system is the decrease of the soil resistivity and consequently of the grounding impedance, due to soil ionization phenomena that take place, when the density of the injected current exceeds a critical value. In this paper two circuit models proposed by researchers have been implemented using the ATP/EMTP programme in order to simulate the transient response of a grounding system taking soil ionization into account. The simulation results are compared to measurements received by imposing impulse voltages on soil samples. The accuracy of each model is evaluated according to the level of proximity to the oscillogramms and conclusions are drawn about the effectiveness of each modeling approach.
Keywords :
earthing; integrated circuit modelling; ionisation; soil; transient response; ATP/EMTP programme; circuit models; grounding impedance; grounding system; impulse voltages; oscillogramms; proximity; soil ionization; soil resistivity; soil samples; transient behaviour; transient response; Current measurement; Density measurement; EMTP; Grounding; Ionization; Semiconductor process modeling; Soil measurements; equivalent circuit; simulation; soil ionization; transient response;
Conference_Titel :
Lightning Protection (ICLP), 2012 International Conference on
Conference_Location :
Vienna
Print_ISBN :
978-1-4673-1898-3
Electronic_ISBN :
978-1-4673-1896-9
DOI :
10.1109/ICLP.2012.6344371
