Equivalente de redes elétricas para avaliação da estabilidade de tensão em tempo real baseado em medições fasoriais sincronizadas

Abstract

This dissertation proposes an innovative methodology for the construction of real-time measurement-based network equivalents, by the use of local bus voltage and current phasor measurements. Some features make this proposal unique, mainly those related to dealing both with Power System real-time behaviour and measurement system special properties, as high sampling rate and presence of measurement noise. Filtering techniques are used to obtain consistency and accuracy of the equivalent parameters. To cope with electrical system dynamic, damping procedures are implemented. The equivalent ability to represent power system in realtime environment allows to monitor system Voltage Stability operating condition. Monitoring system dynamic behaviour during real-time is vital, mainly to avoid critical situations, such as those imposed by security limits. The studies in this work are carried out in standardized networks and in high voltage busbar of the Brazilian Interconnected system.