Peak-cut control device

A peak-cut control device in a natural energy power generation system including a storage battery having a natural energy power generation device and a storage battery for charging/discharging a part of power generated by the natural energy power generation device, the peak-cut control device comprising:

• a difference power calculating section that calculates differential power between a planned power generation amount in the natural energy power generation device determined based on a temporary peak cut amount and a demand prediction power amount that predicts a power demand for each predetermined time;
• and
• a peak-cut amount calculating section that compares the differential power calculated by the difference power calculating section with chargeable power or dischargeable power per unit time of the storage battery every predetermined time and simulating charge/discharge of the differential power to/from the storage battery and an increase/decrease in the temporary peak-cut amount.