Modelo de Circuito para la Corriente Continua de Retorno en el Interior del Subsuelo Terrestre

Abstract

High Voltage Direct Current Transmission Systems (HVDC) are economically competitive when they transmit much power over a long distance. Although in Argentina this technology has not yet been implemented, it is in other developed countries. There are three common configurations: monopolar, homopolar and bipolar. Under normal operating conditions, the first two use the earth as a return conductor. In bipolar transmission, if a fault occurs which affects one of the lines, the earth can be used as a return conductor and half the rated power can still be transmitted. Consequently, in order to evaluate losses, the corrosion process, electrical safety and environmental impact, it is necessary to determine the actual path of the return current in the ground. A contrasting circuit model is proposed here, which allows to evaluate the percentages of the return ground current distribution at any location along the entire line.