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Dynamic load restoration considering interdependency between power distribution system and urban transportation system

After a major outage, mobile emergency resources (MERs) can be dispatched via the transportation system (TS) for service restoration to critical loads in the power distribution system (PDS). In this case study, the efficiency of service restoration in the PDS is associated with the traffic efficiency of the TS, and vice versa, because the PDS and TS are mutually coupled through traffic lights and MERs. This paper proposes a service restoration method considering interdependency between the PDS and TS, which is formulated as a mixed-integer linear program (MILP). The objective includes maximizing the efficiency of both PDS restoration and TS. By solving the MILP, the dynamic load restoration and MER dispatch strategies can be obtained. For the PDS, the availability of MERs, including mobile sources and repair crews, relates to their dispatch in the TS, and their relationship is formulated as mathematical models. For the TS, the dynamic traffic flow is modeled using the cell transmission model and the effect of traffic lights is considered. Case studies validate the effectiveness of the proposed method.