Análisis de estabilidad oscilatoria de pequeñas señales de tiempo real en el Sistema Nacional Interconectado

Abstract

CONDITIONING OF PROJECT PUBLICATION. complexity of Ecuador's National Interconnected System (SNI) reduces the natural damping of small-signal oscillation modes. This reduction compromises the dynamic stability of the system. CENACE requires a tool for real-time monitoring of oscillations and their associated generating units to support decision-making. In response, an automated procedure was implemented in PowerFactory to analyze the system's small-signal oscillatory stability and identify generators that amplify oscillations. This tool quickly reveals system vulnerabilities, improving operational decisions. The analysis was performed for a specific day and time. Based on this analysis, it was possible to identify generators located in both Colombia and Ecuador that are directly associated with inter-area and high-frequency oscillation modes. These findings highlight the need to implement mitigation measures, particularly related to the tuning or deployment of Power System Stabilizers (PSS) in the identified generators, in order to strengthen control strategies that ensure the safe and stable operation of the national power system. Keywords: National Electricity Operator (CENACE), Oscillatory stability, Power System Stabilizers (PSS), Small-signal oscillation modes, Modal analysis.