Estudio de Coordinación de Protecciones en el Sistema de Subtransmisión de la Empresa Eléctrica Quito considerando la conexión de la Línea Vicentina – Santa Rosa 138 kV

Abstract

This paper carries out the study of coordination of protections in the subtransmission system of the Electric Company Quito (EEQ), which is modeled in The program PowerFactory under four operating scenarios considering the connection of the line Vicentina-Santa Rosa 138 KV. On this system the zone of influence of the topological change was delimited, for which a study of short-circuits in bars was carried out, being based on the new short-circuit powers of those substations that were affected. The results obtained from this study were used for the sizing of the transformation relationships of the current and potential transformers located within that zone, as well as for the verification of the operational capacity of Cutting equipment and Disconnect to new current requirements. The protections coordination study was carried out for the distance and overcurrent relays installed within the zone of influence, whose validation was carried out in the four operating scenarios modeled through the simulation of different Shorts, other than those considered for adjustment, so that a finer adjustment was obtained for each protection.