Patent ID: 8321064

Claim:
A power control system comprising: a power distribution facility configured to distribute alternating current power to a power distribution system; and a plurality of customers each including a grid interconnection device configured to interconnect a power storage device to the power distribution system, wherein the plurality of customers are grouped into a plurality of groups, the grid interconnection device comprises: a controller configured to control input/output power indicating forward flow power that flows from the power distribution system to the power storage device and backward flow power that flows reversely from the power storage device to the power distribution system; a receiver configured to receive a first adjustment instruction to adjust or set the input/output power, and a second adjustment instruction to adjust a power storage amount in the power storage device, the first adjustment instruction transmitted through a predetermined transmission path, the second adjustment instruction transmitted through the predetermined transmission path before the first adjustment instruction; and a determination unit configured to determine whether or not an own group to which the grid interconnection device belongs to is an application group, on the basis of group information being included in each of the first adjustment instruction and the second adjustment instruction and indicating the application group to which each of the first adjustment instruction and the second adjustment instruction is applied among the plurality of groups, wherein the controller controls the input/output power on the basis of the first adjustment instruction and controls the power storage amount on the basis of the second adjustment instruction if the determination unit determines that the own group is the application group.