Abstract

BASTIDAS MORA, Henry. The theoretical foundations for calculating the technical parameters for low-tension overhead electricity lines for use in telecommunications. Ing. Investig. [online]. 2009, vol.29, n.2, pp.107-111. ISSN 0120-5609.

This article presents the properties of electric power networks for use as a channel for transmitting telecommunications signals. It starts by exploring the principles and theoretical basis for calculating power lines' critical technical parameters, referring in detail to the following primary parameters: inductance, capacitance, conductance and resistance. It then deals with e secondary parameters (most useful from a telecommunications perspective): characteristic impedance and propagation constant (the attenuation constant being the latter's real component). Different topologies and low- and medium-tension aerial power line structures are verified; a mathematical model is then proposed to analyse their behaviour at high frequencies, extending to most aerial electric power distribution systems in Colombia. This work includes some of the results from previous research which was known as "U-sing power line telecommunications (PLT) technology for designing a solution for accessing the broadband internet in rural areas of Colombia" by the present author and the Pilot University of Colombia. The proposed mathematical model provides a tool for making theoretical calculations applicable to PLT.

Keywords : PLC; inductance; capacitance; leakage conductance; resistance; characteristic impedance; propagation constant; attenuation.

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