To compose a balancing group in accordance with a prediction error in a prediction and an inclination of a removal direction in each region by a power generation or weather in a power which can be supplied in a power generation side to reduce the generation of an unnecessary imbalance.SOLUTION: A component
system of a power generation balancing group, is constructed by: an actual
data acquisition part 76a that measures a power amount generated by each power generation facility, and acquires an actual data related to position information on the power generation facility and power generation information related to a
power generation system; an external
information acquisition part 76b that acquires external information such as weather information or the like from an information
service organization; a prediction part 74 that predicts of a power generation amount of the power generation facility on the basis of a correlation of the actual data and the external information; a prediction error calculation part 74c that compares an actual power generation amount of the power generation facility with the prediction of the power generation amount, and calculates a prediction error of the prediction of the power generation amount in each power generation facility; a deviation tendency analysis part 751 that analyzes a relation of the power generation information of each power generation facility and the prediction error, and the outer information as deviation tendency information; and a balancing
group setting part 75 that divides the group of the power generation facilities into a plurality of balancing groups on the basis of the deviation tendency information of each power generation facility.SELECTED DRAWING: Figure 4