Coordinación de las protecciones de sobrecorriente del sistema de subtransmisión de la Empresa Eléctrica Provincial Cotopaxi ante el cambio de configuración de red radial a red en anillo

Abstract

The electrical protections have a fundamental role for the appropriate operation and safety within an electrical power system, particularly for subtransmission systems because it is the system that supplies power to distribution companies from the points of interconnection to the load centers, and therefore it becomes a vital system within these companies, which requires an efficient system of protections, to ensure the integrity of peoples and electrical elements protected and the continuity of electric service. For this reason, in the subtransmission system of the Cotopaxi Provincial Electric Company (ELEPCO S.A.), it is planned to carry out, in the near future, a topological change of its subtransmission networks. This change implies to change the network from a radial to a ring configuration, so it requires the design of a system of protections that through its implementation allow the transport of energy safely and reliably, improving the quality of electric service of its users. The present work has as main objective, to carry out a study of coordination of protections of the system of subtransmission to 69 kV of ELEPCO S.A. considering its ring network operation, to determine the adjustments and coordination of protections for each of the equipment that make up the subtransmission system, so that when an adverse event occurs, the system of protections meets the basic objectives for which was established as they are: selectivity, sensitivity, speed and reliability. Finally we show some results of the coordination of protections to verify the correct functioning within the subtransmission system.