Operational support device for power generation facility

An operational support device for a power generation facility to set a stop time to stop operating the power generation facility, the operational support device comprising:

• a controller comprising a central processing unit;
• and
• a storage unit comprising a memory configured to store a calculation of the controller and information on computer programs, the storage unit including an external storage device,
• wherein the controller is configured to read software stored in the storage unit to:
• set a candidate stop time serving as a candidate for the stop time;
• acquire a value of a life index value at a start time serving as a predetermined time after a current time, the life index value being an index indicating a life of the power generation facility and changing in value in one direction with the output of the power generation facility;
• a acquire a degree of contribution to a stable supply of electricity assigned to an amount of electricity supply per unit time in each unit time during a period from the start time to the candidate stop time;
• set, based on the life index value at the start time and the degree of contribution during the period from the start time to the candidate stop time, an output pattern per unit time of the power generation facility during the period from the start time to the candidate stop time such that the life index value reaches a predetermined value set in advance at the candidate stop time, and an evaluation value based on the degree of contribution and the amount of electricity supply per unit time during the period from the start time to the candidate stop time is maximized;
• and
• a set the stop time based on the output pattern.