Interactive long-term simulation for power system restoration planning

The problem of restoring a power system following a complete blackout is complex and multi-faceted, Many control actions have to be performed on time, while constraints such as power balance and system stability have to be carefully respected, In this paper, the application of long-term dynamic analysis in studying frequency and voltage responses due to load and generation mismatches in isolated systems or during extension of the existing system in the restoration phase is presented. Simulation results covering the main steps of the Hellenic power system restoration process following a recent total blackout are presented and discussed.