Real-time monitoring and assessment of rotor angle stability

Integration of large scale renewable power electronics based production in current AC bulk power system can result in a decrease of the system inertia, short-circuit capacity and synchronizing torque which will cause more rapid changes in the rotor angles of the generators and thereby a higher risk for rotor angle instability.

Real-time monitoring and prediction of rotor angle stability is an important tool for a transmission system operator to measure the system capability for ensuring a secure operation when major disturbances occur thereby to avoid power outages. It also helps the system operator to take remedial actions to the system capability as per requirement.

The aim of this project is to monitor and predict rotor angle stability by applying appropriate algorithms based on real-time PMU-data. The used/developed methodologies in this project may be integrated into the common Nordic Early Warning Early Prevention System (NEWEPS).