Power management system and non-transitory computer readable medium

A power management system, comprising:

• a detector that detects, in each of a plurality of areas, one or more devices which are located within the area and which consume electric power;
• a demand estimation unit that estimates electric power demands each for a corresponding one of the plurality of areas on the basis of the devices detected by the detector;
• and
• a distribution unit that distributes area power-saving target values to the plurality of areas on the basis of the electric power demands estimated by the demand estimation unit and an overall power-saving target value set in advance, wherein
• the plurality of areas include a first area,
• in response to a change in the number of devices in the first area to which the area power-saving target value has been distributed by the distribution unit, the demand estimation unit estimates an updated electric power demand in the first area on the basis of the number of devices that has changed, and
• the distribution unit updates the area power-saving target value of the first area on the basis of the updated electric power demand estimated by the demand estimation unit, and distributes the updated area power-saving target value to the first area.

A non-transitory computer readable medium storing a program causing a computer to execute a process for power management, the process comprising:

• detecting one or more devices which are located within an area and which consume electric power;
• estimating an electric power demand in the area on the basis of the detected devices;
• distributing an area power-saving target value to the area on the basis of the estimated electric power demand and an overall power-saving target value set in advance;
• estimating, in response to a change in a state of the devices in the area to which the area power-saving target value has been distributed, an updated electric power demand on the basis of the state of the devices that has changed;
• updating the area power-saving target value on the basis of the estimated updated electric power demand;
• and
• distributing the updated area power-saving target value to the area.