Emergency power supply scheme and fault repair strategy for distribution networks considering electric -traffic synergy

Abstract

Natural disasters often lead to multi-point failures in urban active distribution networks (ADN), and the formulation of reasonable power supply plans and failure recovery strategies can reduce the time of power loss of critical loads. With the strengthening of electric-traffic network coupling, information sharing and resource interoperability between the two networks have been realized. Based on this tightly coupling characteristics, the emergency power supply scheme and fault repair strategy for ADN have been proposed. Firstly, the framework of electric-traffic synergy mechanism has been constructed which to ensure the coordination and synchronization between the two different systems during the restoration period; on this basis, we establish the optimal path solving model for emergency resources considering the dynamic traffic flow、and cross-cycle passage time to realize the rapid dispatch of maintenance personnel and emergency power vehicles; and then we developed a mathematical model of integrated power station(IPS) and formulated its power support strategy; after that, the two-stage strategy of emergency power supply and failure repair of the ADN is formulated, and the rolling optimization method is adopted to solve the topology reconfiguration scheme of the grid, the energy support strategy and the personnel and material dispatch plan after the disaster, so as to allocate the resources in an orderly manner and accelerate the recovery of the power supply. Finally, the example results verify the effectiveness of electric- transportation coordination in accelerating the recovery of ADN, and the proposed strategy can ensure the continuous power supply of important loads.