Coordinating Supply, Demand, and Repair Resources for Optimal Postdisaster Operation of Interdependent Electric Power and Natural Gas Distribution Systems
Power and gas systems are increasingly interdependent due to development of natural gas-fired generation and gas industry electrification. Recent energy crises have highlighted how this characteristic affects their response to disasters and driven the need for improving resilience of these interdependent systems. In this paper, we focus on the interdependent electric power and natural gas distribution systems (IENDS) and propose a comprehensive "supply - demand - repair" strategy to help the IENDS tide over the emergency periods after disasters by coordinating various emergency resources. Specifically, we investigate and address fuel supply issue of single- and dual-fuel generators by modeling their fuel delivery process involving fuel tankers. On the demand side, we propose a zonewise approach to group customers with intertwined energy supplies, thereby realizing an integrated dispatch of power and gas demand responses to alleviate the operational stresses on the IENDS. Furthermore, repair process for damaged facilities is modeled in a flexible form, considering varying efficiency and allowing for independent and collaborated repair works. This strategy is formulated into a mixed-integer second-order cone programming model to deploy various resources in a coordinated and organized manner. Case studies are conducted to validate the effectiveness of the proposed strategy.
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