Power management apparatus, power management method and power management program

In a power management method having a power storage device which is connected to a feeder to feed power to a railway, can be charged with a regenerative power generated from the railway, and is connected to a distribution system to supply power to a station facility, and can discharge power to the distribution system, the power management method comprising:

• acquiring charge amount estimation information necessary for charge amount estimation of the power storage device;
• estimating a charge amount of the power storage device based on the charge amount estimation information;
• calculating a discharge amount from the estimated charge amount and a remaining amount of the power storage device;
• and
• discharging the discharge amount from the power storage device to the distribution system.

A power management system comprising:

• a power storage device which stores a power from a distribution system, and a regenerative power that a train has generated, and is received through an overhead line, and supplies the stored power to the distribution system or the train;
• a power conditioning system provided between the distribution system and the power storage device;
• a chopper unit provided between the overhead line and the power storage device;
• and
• a power management apparatus which controls the power storage device and the power conditioning system, so as to store power into the power storage device and supply power from the power storage device.