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This paper analyzed transient magnetic fields generated by the lightning current in the presence of 3-D conductive plates. An extended partial element equivalent circuit method was introduced to establish a network with frequency-invariant parameters for time-domain simulation. Three techniques were proposed to reduce the computational complexity in the large-plate simulation, including the analytical...
This paper analyzes transient magnetic shielding made by conductive plates using the PEEC method. A double-exponential function is adopted for eddy current distribution to avoid extensive meshing on the plate. Circuit parameters are determined by evaluating complex power associated with cell currents. A vector-fitting technique is applied to extract frequency-invariant resistance and inductance. A...
This paper presents an investigation into transient surge impedance of a vertical conductor over a perfect ground during a lightning struck. An equivalent circuit approach is employed, and voltage on the conductor is directly obtained by using traditional circuit analysis techniques. The transient surge impedance is then computed with the instantaneous voltage and current obtained in the simulation,...
This paper presented a modeling procedure for a DC traction power system (TPS) of electrified railway to study lightning transients with EMTP. The TPS included overhead lines, electric cables on the ground, masts and other associated components. The nonlinear ionization characteristic of earth resistance and the flashover characteristic of insulators were taken into account. These models were integrated...
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