Transmission systems congestion management by using modal participation factors

Power system congestion management is a hard task, and the electricity industry restructuring process tends to difficult it even more. The competitive electric power market arises new congestion management perspectives and difficulties. This work demonstrates that modal analysis technique can be a powerful tool for defining corrective actions to overcome congestion problems. Extensive voltage stability margin assessment, for a test system, shows that modal participation factors allow the identification of congested areas, and also the most adequate active and reactive power based control actions to relieve congestion.