Abstract
To strengthen energy resiliency, a multi-objective optimization tool was developed, which can calculate optimum amounts to install distributed power generators as private power generation equipment which is available not only during an emergency situation but also during a normal situation. As distributed power generation equipment, cogeneration systems, photovoltaic system, and storage batteries were considered. The tool was developed based on our previous study and two objective functions were applied; one is the expected value of electric power shortage ratio after disasters as an index of the energy-resilience and the other is the total cost as an indicator of economic and environment. Then, case studies were performed considering several sizes and gas-supply pressure type of hospitals. As a result, reasonable Pareto-optimal solutions were obtained. For comparison, a case of an equivalent hospital only installed emergency generators were calculated, and the solution was plotted on the same plane of the objective functions. Therefore, the expected value of the power shortage rate after disasters was 32%. On the other hand, in all the case of the obtained optimal solutions, the expected value could be reduced to less than 20%. In addition, the total cost could also be reduced.
