Explicit Resilience Assessment Model for Distribution Systems With Arbitrary Protection and Switching Equipment Configuration

Abstract

The power outages caused by extreme events are becoming more frequently and damage the distribution networks in recent years. Therefore, the concept of resilience was proposed to measure the performance of the distribution systems in high-impact and low-probability (HILP) events. In this paper, we propose an explicit resilience assessment model for the distribution networks. For HILP events, an explicit formulation model is proposed to describe the evolution of the distribution system from the contingencies occurrence to system recovery, in which the actions of protection and switch equipment, such as circuit breakers, automatic switches and manual switches, are fully considered. Based on this formulation, an explicit resilience assessment model considering the maintenance resource constraints is developed, which embeds the optimization of outage recovery sequence. The resilience assessment model is finally cast as an instance of mixed integer linear programming (MILP). Case study on the modified IEEE 33-node and IEEE 123-node systems is performed and the effectiveness of proposed method is verified.