ELECTRIC LINES - Surge Protection - ELECTROMAGNETIC PULSE;
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摘要:
The theory of a transmission line with distributed sources is useful in the analysis of electromagnetic pulse coupling to shielded cables and in the analysis of system-generated electromagnetic pulse. To facilitate computer simulations of cable surges induced by these nuclear environments, a two-port equivalent source model for a uniform, time-invariant transmission line with independent distributed sources is presented. The equivalent source model is based on a circuit synthesis of the boundary conditions imposed by the line's reflection coefficient and requires only the solution of the matched-load termination responses. This model simplifies the algebra required by previously published techniques. The model is compact, requiring only six nodes for a mathematically precise simulation, and should prove useful in the assessment of interface-cable surge threats in electrical systems where large numbers of circuits need to be evaluated with some precision. This model is valid in the frequency domain with linear load terminations and dispersive, lossy transmission-line propagation parameters. The Fourier spectra of linear load responses are formulated for numerical inversion to the time domain.