The distributed power resources such as solar power generation connected to electrical distribution networks are increasing with the support of FIT (Feed-in Tariff) of renewable energy under trends of decarbonization. They are expected to reduce the interruption of electric power caused by accidents and natural disasters for distribution facilities. Residents and business operators seek to obtain advanced information such as the occurrence of power outages and recovery times in the event of disasters. This is because it also affects the optimization of actions in the event of a disaster, such as evacuation planning and procurement of necessary goods. From the reason above, Matsumoto et al. (2020) evaluated the restoration process of power supply, taking into account damage to users due to earthquakes, as a power supply curve for a hypothetical electrical distribution area connected to distributed power resources. This enabled us to grasp the process of power outage recovery for the entire electrical distribution area, as well as quantitatively show the effectiveness of distributed power resources in accelerating power outage recovery and reducing power supply disruptions.
The installation of distributed power resources is usually decided by each user, but if areas or users where delays in power supply are expected can be identified in advance, it will be possible to make efficient deployment plans for the entire distribution area. In this paper, first, we identify areas and users where power supply will be delayed due to an earthquake in an electrical distribution network with distributed power resources. In addition, we show the power outage recovery time of the entire electrical distribution network when distributed power sources are concentrated in as particular area or user. Furthermore, we discuss the possibility of efficient deployment planning that takes into account the optimization of actions immediately after a disaster occurs.