Self-Sustaining of Post-Disaster Pelagic Island Energy Systems With Mobile Multi-Energy Storages

Abstract

Extreme natural hazards may damage the pelagic island energy system (PIES) integrating distribution systems, cold storages and desalination stations, resulting in the electric service interruption, stored food deterioration, and freshwater shortage. To alleviate the energy demand of residents as much as possible before the arrival of mainland emergency resources, a novel self-sustaining strategy of post-disaster PIESs with mobile multi-energy storages is proposed in this paper. First, mobile multi-energy storages are used to delivery electricity, ice, and water among stations to increase the resource supply resilience. Their differences in resource delivery time and transportation energy consumption are modelled. On this basis, mobile multi-energy storages are coordinated with diesel generators, cold storages, desalination devices, network reconfiguration, and islanded grid merging for self-sustaining of post-disaster PIESs. The utility loss evaluation model of the common electric load shedding, food deterioration, and freshwater shortage is established, in order to better reflect and respond to the needs of residents. Robust optimization methods are also used to address the uncertainties of the renewable generation, multi-type load demand, and especially energy transmission (i.e. traffic congestion time and line repair time), making the restoration strategy reliable. Finally, case studies verified the superiority of the proposed strategy.