During power outages, blackout sections could be recovered early by switching the states of switchgears in distribution networks. The scale of the remaining power outage depends on the initial network configuration. Therefore, it is important to determine an initial configuration that facilitates service restoration in advance. In this paper, we propose a method to find such a configuration by solving the configuration optimization problem with the objective function of minimizing the remaining power outage. We experimentally show that both current margin and voltage margin are secured as features of the configuration to minimize the remaining power outage. Furthermore, we also show that the configuration with the minimum remaining power outage can also reduce distribution loss during normal times.
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