Abstract: Economic efficiency in power control including transmission and reception of electric power to and from an external power market is improved. An EMS serving as a power control device that is able to transmit and receive electric power to and from a power market and controls operations of one or more power instruments includes: a host control unit serving as a transmitted/received electric power determining unit configured to determine an amount of transmitted/received electric power which is an amount of electric power transmitted to and received from the power market based on a power-market unit price in the power market and information related to an operating situation of the one or more power instruments; and an intra-grid control unit serving as an operation instruction determining unit configured to determine an operation instruction for the one or more power instruments based on the determined amount of transmitted/received electric power.

Abstract: An EMS includes a control unit that controls a power generation facility and a power adjustment unit that adjusts an amount of supply of supply power. The control unit includes: a reverse power flow suppression process determination unit; a priority decision unit that decides a priority for adjusting an amount of power generated for the two power generation devices of the power generation facility on the basis of a predicted degree of fluctuation in load power; and a device control unit that controls the power generation facility such that the amount of power generated is adjusted in descending order of the priority decided by the priority decision unit when the reverse power flow suppression process determination unit determines to reduce the amount of power generated by the power generation facility.

Abstract: An EMS includes a control unit that controls a power generation facility and a power adjustment unit that adjusts an amount of supply of supply power. The control unit includes: a reverse power flow suppression process determination unit; a priority decision unit that decides a priority for adjusting an amount of power generated for the two power generation devices of the power generation facility on the basis of a predicted degree of fluctuation in load power; and a device control unit that controls the power generation facility such that the amount of power generated is adjusted in descending order of the priority decided by the priority decision unit when the reverse power flow suppression process determination unit determines to reduce the amount of power generated by the power generation facility.