Abstract

JARAMILLO, Daniela; FONSECA, Antonio  and  PEREZ, Fabián. Methodology to Determine the Distribution of Unbalanced Currents of Overhead Electric Power Transmission Lines. Rev Politéc. (Quito) [online]. 2019, vol.44, n.2, pp.15-24. ISSN 2477-8990.  https://doi.org/10.33333/rp.vol44n2.02.

Electrical overhead power lines present a constant function of operation and must withstand against environmental factors such as electrostatic discharges. Therefore, it is important to select adequate phase and ground conductors in order to support their mechanical characteristics. In addition, ground conductors have a steel component presenting variable electrical parameters that can be utilized to determine the current flowing through the ground wire. Accordingly, this document describes two possible methods to determine the distribution of the current between the earth and the ground wire within unbalanced conditions in which it is possible to select the electrical parameters for the correct configuration of a transmission line. The results of these methods, applied in four case studies, can be verified with their respective simulations using the Alternative Transients Program (ATP) software.

Keywords : Steel conductor; Unbalanced currents; Transmission lines.

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