6533b7d6fe1ef96bd1267113

RESEARCH PRODUCT

Finite difference time domain simulation of soil ionization in grounding systems under lightning surge conditions

Fabio ViolaElena ToscanoElisa FrancomanoElisa FrancomanoGuido Ala

subject

PhysicsFinite difference electromagnetic transient grounding systemsGroundSoil resistivityFinite differenceFinite-difference time-domain methodSoil ionizationOcean EngineeringMechanicsPhysics::Classical PhysicsNon-linear effectsSettore MAT/08 - Analisi NumericaSettore ING-IND/31 - ElettrotecnicaIonizationLightning surgesSimulation

description

This paper proposes a Maxwell’s equations finite difference time domain (FDTD) approach for electromagnetic transients in ground electrodes in order to take into account the non linear effects due to soil ionization. A time variable soil resistivity method is used in order to simulate the soil breakdown, without the formulation of an initial hypothesis about the geometrical shape of the ionized zone around the electrodes. The model has been validated by comparing the computed results with available data found in technical literature referred to concentrated earths. Some application examples referred to complex grounding systems are reported to show the computational capability of the proposed model.

yearjournalcountryeditionlanguage
2004-03-01
10.1002/anac.200310008http://hdl.handle.net/10447/2199