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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 a Partial Element Equivalent Circuit (PEEC) based simulation tool, called TAES for simulating transients in a wire system. The enhancement in the traditional PEEC model with the vector fitting method is provided in order to achieve a time domain simulation for frequency-dependent conductors. A system with steel bars, cables and arrestors is studied and results of experimental verification...
Analysis of lightning current in communication and power cables is essential for lightning protection in radio base stations. In this paper an equivalent circuit method is developed to evaluate lightning current distribution among the cables mounted on a cable ladder. Both skin and proximity effects in the cables are taken into account and an efficient modelling procedure is presented. The proposed...
This paper presents an investigation into transient surge impedance of a vertical conductor over the ground during a lightning stroke. An equivalent circuit approach (PEEC) is employed to evaluate path-independent voltage on the conductor. The transient surge impedance is then computed in time domain until the reflected surge is back to the observation point. It is found that transient surge impedance...
This paper presents an extended PEEC formulation for the evaluation of magnetic shielding at low frequency. The shielding is made by linear magnetic plates. In this formulation, circuit equations and constitutive relation were set up using both induced current and surface current of magnetization. With the analytical function for the induced current across the plate thickness, this approach eliminates...
This paper discusses the surge propagation at the discontinuity of a vertical line over the ground. Similar to a traditional transmission line, surge transmission at the discontinuity can be determined by its surge impedances. However, the surge impedances are different from the characteristic impedance of the transmission line. They respond differently to incident, transmitted and reflected waves,...
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