CONTROL DEVICE

A control device for controlling charging and discharging of power storage systems includes: an acquisition unit configured to acquire an intention to participate in a DR for adjusting a power supply and demand balance in a power grid from consumers when the DR is contracted in a power transaction; a resource ensuring unit configured to ensure, from the power storage systems, a power resource that the power storage systems are able to supply to the power grid during an execution period of the DR; a plan formulating unit configured to adjust a charging state of each of the power storage systems during a preliminarily controllable period that is a predetermined period before a start of the DR and formulate a plan for increasing the power resource able to be supplied during the execution period; and a communication unit configured to transmit the plan to the power storage system.