| The modeling of Geomagnetically Induced Currents (GICs) on networked conductors is discussed. A non-uniform influence near the surface of the Earth is modeled. A complex-image calculation method that models the auroral electrojet as an infinite current filament is used. Theoretical examples show the necessity of using in-line voltage sources for modeling the effects of non-uniform fields. A method for calculating the total voltage induced along the path of an arbitrary conductor is described. A power system simulator, PSCAD, is used to compare currents in networks where induction is represented by grounded and in-line voltage sources. The results show that in-line voltage sources are required to correctly model realistic GIC flow in networks. |
