Electric Power System Planning Operation Device, Method, and System

An object is to provide an electric power system planning operation device, a method, and a system that can realize the reduction of social costs and the improvement of the resilience of an electric power system. An electric power system planning operation device against occurrence of a disaster includes: a disaster information selection unit that selects disaster information data of a disaster type to be handled, to be used as disaster information selection result data, from disaster information data for each disaster type; a disaster countermeasure candidate calculation unit that calculates a disaster countermeasure candidate, to be used as disaster countermeasure candidate calculation result data, by using the disaster information selection result data, system maintenance countermeasure candidate data that is information about performing maintenance of a system facility in preparation for a disaster, and system operation countermeasure candidate data that is information about defining a system operation countermeasure in preparation for a disaster; a reliability economic efficiency index value calculation unit that calculates a reliability economic efficiency index value for the disaster countermeasure candidate calculation result, to be used as reliability economic efficiency index value data, by using the disaster countermeasure candidate calculation result data, system data that is information about the configuration of an electric power system, damage cost data that is information about the amount of damage at the time of an assumed disaster type, and reliability economic efficiency index data that is information indexing a relation between reliability and economic efficiency; and a disaster countermeasure decision unit that decides a disaster countermeasure by using the reliability economic efficiency index value data.