A robust optimal restoration approach for the multi-microgrid active distribution network in the presence of the MESS fleet

The occurrence of natural disasters can lead to the destruction of communication roads and electricity distribution lines.In this situation, to feed sensitive loads the flexibility of the network can be increased using the fleet of Mobile Energy Storage Systems (MESS).However, the destructive effects of natural disasters are not limited to the infrastructure of the electricity distribution network and may also damage some road lines which disrupts the dispatch of the MESS fleet.Since these failures are not certain, it is necessary to consider these uncertainties when determining the restoration scheduling of the Multi-Microgrid Active Distribution Network (MMADN) in the presence of the MESS fleet.In this regard, a comprehensive optimal robust restoration method for the distribution network after natural disasters is presented.In the proposed model, the MESS fleet dispatch along with their charge and discharge schedule is determined in coordination with the available local energy resource in the MMADN considering the worst simultaneous damages to the roads and distribution lines.Also, a two-level approach with a metaheuristic algorithm in the upper level and the CPLEX solver in the lower level is developed to solve the proposed robust model.The simulation results on the modified IEEE 33-bus distribution network confirm the efficiency of the proposed method to schedule the MESS fleet and the microgrid resources to restore critical loads, optimally.