NEMP-Induced Surges on Multiconductor Nonuniform Power Lines
- 3 March 1987
- proceedings article
- Published by Institute of Electrical and Electronics Engineers (IEEE)
Abstract
The high-altitude nuclear electromagnetic pulse is represented by means of already known analytical models. The HANEMP is considered as an incident plane wave towards the ground; the incident electric field pulse shape is described by a double-exponential waveform. The total field is the sum of the incident wave and the wave reflected from the ground surface. The coupling between the plane electromagnetic wave pulse and an overhead multi conductor power line results in series and shunt distributed sources for which analytical expressions are derived in the frequency-domain. A very accurate simulation model of the line it. utilized; this takes into account, the frequency dependence of the conductors and ground impedances. The travelling wave theory is applied to define an accurate propagation model on a multiconductor nonuniform transmission system; reflection and refraction phenomena caused by discontinuity points are considered. The current and voltage frequency-values are used for frequency-time transformations, in the transient analysis. The line time-response is obtained by an inverse Discrete Fourier Transform. A complete digital program has been developed which can also be used on a personal computer. The algorithms proposed are applied for the transient analysis of HANEMP induced currents on a typical 765 kV multi conductor transmission line.This publication has 0 references indexed in Scilit: