Power system and method for managing charging state in that power system

摘要

Generation power determining unit specifies efficiency characteristic based on identification ID of each vehicle. Generation power determining unit determines a power generation mechanism or mechanisms to be operated such that amount of power consumption by the power generation mechanism or mechanisms as a whole is minimized. By dividing power £Pg* necessary for charging an electric storage unit that is in a low-charge state by the number of mechanisms to be operated (for example, 2 or 3), fuel consumption efficiency corresponding to generation power to be shared by each power generation mechanism in each case is obtained. There is a relation of ·(1/2) > ·(1/3) and, therefore, it can be understood that two power generation mechanisms are to be operated to minimize total amount of fuel consumption. Generation power determining unit transmits a power generation instruction to vehicles that correspond to the determined two power generation mechanisms.