Hierarchical time-extended Petri nets as a generic tool for power system restoration

Power system restoration following a system collapse, is a very complex task. A wide variety of control actions has to be performed on time, while constraints such as power balance and system stability have to be carefully respected. In this paper, hierarchical time-extended Petri nets are exploited, in order to support the restoration process. The proposed framework has been applied to the blackstart of the Hellenic power system. Crucial issues pertaining to the restoration procedures are identified and the corresponding Petri net models are presented.