A General Framework for Resiliency Evaluation of Radial Distribution System Against Extreme Events

Considering a number of recent prolonged power outages caused by extreme weather conditions or more generally natural disasters, resiliency evaluation of power system is necessary for power system operators and utility owners in order to have a profound understanding of possible consequences of High Impact-Low Probability (HILP) events. This paper represents a generalized framework that could be implemented for resiliency evaluation of distribution systems against various types of natural disasters. Similar to the classic approach for reliability evaluation of distribution systems, an approach is introduced to evaluate the resiliency of distribution network. Graph theory concept is used to evaluate the probability of serving loads during a typical extreme event. IEEE 37-node and IEEE 123-node radial distribution systems are used to demonstrate the fulfillment of the proposed approach.