Future improvements in the Romanian EPS Defence Plan

The Defence Plan comprising the automatic measures foreseen to prevent the occurrence of major disturbances or to limit their consequences in the Romanian Electric Power System (EPS) is in a permanent evaluation process in order to include and develop new actions adapted to the changes of the network structure. These new measures are chosen in relation with the nature and intensity of the disturbance and their action, in conjunction with the existing measures, is to re-establish the EPS normal operation. The aspects related with the stability reserve of a power system before a blackout might occur are treated in this paper. Both online and offline simulations are presented like measures for future improvements in the Romanian EPS Defence Plan.