A Comprehensive Resilience-Oriented FLISR Method for Distribution Systems

Abstract

Under extreme events, distribution systems may suffer blackouts and numerous restoration tasks will compete for limited crews and facilities. To enhance the resilience of distribution systems, multiple resources should be fully coordinated, coupling relationships between fault location, fault isolation, and service restoration should be considered, and flexible strategies should be formed for different situations faced by distribution systems. To this end, a comprehensive resilience-oriented fault location, fault isolation, and service restoration (RO-FLISR) method is proposed in this article, where, the fault location, fault isolation, and service restoration under extreme events are comprehensively considered at the same time for the first time, and multiple resources are coordinated. Three basic modules are formulated in the RO-FLISR method, i.e., the possible faulted zone determination (PFZD) module which could determine all the possible faulted zones when there are multiple faults and DGs, the line patrolling (LP) module which supports the optimal scheme for line paroling based on crews, and the fault isolation and service restoration (FISR) module in which the operation of MSs and RCSs are coordinated for comprehensive fault isolation and service restoration. The modules are formulated as MILP models. Effectiveness of the proposed method is verified with the IEEE 123-bus system.