Coordinación de protecciones del Sistema Eléctrico Interconectado Petrolero a nivel de 69 kV considerando su conexión al Sistema Nacional Interconectado

Abstract

This graduation project has undertaken a study on coordinated power-system protection for the Petroleum Interconnected Power System (PIPS) up to 69 kV. PIPS is connected to the Jivino Substation running at 69 kV. Jivino is part of CELEC EP – Transelectric (Electrical Corporation of Ecuador), which in turn is part of the National Interconnected System (NIS). The PIPS simulation to 69 kV, together with a new sub-transmission line that connects it to the NIS, was carried out in four operational scenarios. The simulation was based on data provided by Petroamazonas EP. The PowerFactory application was used for data analysis. Due to PIPS´ extension, the analysis zone was extended to include the 69 kV sub-transmission system. Once the domain was established, several short circuit studies were carried out in order to identify the minimum and maximum fault currents, which are required for adjusting the differential protective relays, the distance relays, and the overcurrent relays that are integral to the system analysed. Some of them were located on the new sub-transmission line that connect PIPS to the NIS. In addition, the study helped ascertaining the values required for tweaking measurements for the CT and PT instrument transformers. Verification of the coordination and appropriateness of the operational protection equipment was completed by simulating different types of faults under different levels of system demand.