Fault Recovery Method of Active Distribution Network Considering Repair Timing Constraints

Abstract

Aiming at the problem of large-scale power loss after distribution network fault, a fault recovery method of active distribution network considering repair timing constraints is proposed. Based on the power flow and source-load model of the active distribution network, the method takes the maximum weighted load recovery as the main optimization objective, considering the time-varying prediction boundary of new energy output and load demand during the fault duration, and the coupling relationship between the dynamic scheduling of the repair strategy and the finiteness of the maintenance resources is coordinated. The fault recovery decision model of the active distribution network is established, and the second-order cone convex relaxation method is used to solve the model to obtain the optimal fault recovery strategy. Finally, taking the IEEE 33-bus system as an example, a variety of fault scenarios including multi-point permanent faults and sequential faults are set up for simulation verification. The results show that the proposed method can not only significantly improve the fault recovery capability of the active distribution network but also significantly enhance the solution efficiency.