Electromagnetic field coupling to overhead wires: Comparison of wire antenna and transmission line model in the frequency and time domain

Abstract

The paper deals with different approaches for the analysis of electromagnetic field coupling to overhead wires of finite length based on the wire antenna theory, and transmission line method (TLM). The formulation based on the wire antenna theory in the frequency domain is based on the corresponding Pocklington equation, while the time domain formulation is based on the space-time Hallen integral equation. Transmission line model is based on the frequency and time domain Telegrapher's equations.. The integro-differential and integral realtionships arising from the wire antenna theory are numerically handled via the frequency and time domain GalerkinBubnov scheme of the Indirect Boundary Element Method (GB-IBEM), repectively. The transmission line equations are treated using the Finite Difference Time Domain (FDTD) Method. Some illustrative numerical results obtained via different approaches are presented in the paper.

Electromagnetic Field Coupling to Overhead Wire Configurations: Antenna Model versus Transmission Line Approach

“…Transmission line model in the frequency domain is based on the corresponding telegrapher's equations which are handled by using the chain matrix method [10].…”

“…The reduction to the case of a single straight wire or straight wire array is straightforward and can be found elsewhere, for example, in [8]. Figure 4 induced by an external field excitation can be obtained using the field-to-transmission line matrix equations in the frequency domain [10]:…”

“…The electromagnetic field coupling to overhead wires is of great practical interest for many EMC applications [1][2][3][4][5][6][7][8][9][10][11], such as transient excitation of antennas, power, or communications cables. The electromagnetic field coupling to finite length overhead wires can be determined by means of the transmission line model or the thin wire antenna theory in either frequency or time domain [1].…”

Transient Electromagnetic Field Coupling to Buried Thin Wire Configurations: Antenna Model versus Transmission Line Approach in the Time Domain

“…On the other hand, a principal drawback of the wire antenna model is rather high computational cost. Using certain enhanced TL models, one may overcome some limitations of the standard TL model restrictions [6].…”

“…This paper revisits and fully extends the full-wave (AT) analysis methods of transient electromagnetic coupling to straight buried wire scatterer and horizontal grounding electrode configurations directly in the time domain presented in [6][7][8][9][10][11]. A comparison of the AT results with TL model results is given throughout the paper.…”