Survivability and emergency control of electric power systems in a market environment

The survivability concept for large power systems (EPS) deals with heavy systems emergencies, including the cascading ones with large-scale interruption in power supply to consumers. Survivability as an EPS property is characterized by endurance, vitality of its structure and reflects its vulnerability to disturbances. Formalization of the survivability problem is correlated to the notion of the EPS limiting state which can be reached by the system in the process of emergency development and after which the probability of irreversible consequences for EPS and consumers is high. The methodology for the EPS survivability study is based on the analysis of processes of emergency development and system restoration after it. The main ways for survivability improvement consist in the use of emergency control. A market environment creates the specific requirements to emergency control of EPS.