ABSTRACT
The power system reliability as a concept of safety refers to the ability to ensure stable operation in case of a common failure appearance, limit number of incidents and consequences to the grid by itself and to the customers. Common failures are caused by the events with high probability, relatively short duration and relatively small affected region. Mitigation refers to the measures taken to reduce vulnerability and to increase resiliency of the system. Power systems during their operations are exposed to a variety of disturbances that result in different ways on the power system behavior. Concept of resilient power system targets the creation of the grid resistant to any catastrophic contingency with the various magnitudes. The conceptual resiliency curve shows the resilience level as a function of time with respect to disturbance event. The growth of population and economic development shifts the energy consumption toward a higher share of electric power.
