Isolated power grid management device and isolated power grid system

An isolated power grid system comprising:

• an isolated power grid disconnected from a main power grid and operated independently;
• and
• an isolated power grid management device to manage an operation state of the isolated power grid, wherein
• the isolated power grid includes one or more voltage power supplies to function to maintain a system voltage, and a plurality of section switches to determine a connection state with a power transmission and distribution network and divide the power transmission and distribution network, the power transmission and distribution network forming a network electrically connecting the voltage power supply to each consumer,
• the isolated power grid management device includes:
• a turn-on sequence determination unit to determine, based on path information of the power transmission and distribution network, capacity information of a transformer included in each power transmission and distribution section, and capacity information of each voltage power supply, a turn-on sequence of the plurality of section switches in recovery of the isolated power grid from a power failure state;
• and
• a turn-on command unit to provide a turn-on command to the plurality of section switches in accordance with a sequence determined by the turn-on sequence determination unit, and
• when there is a power transmission and distribution section to which a voltage is newly applied by turning on a section switch of section switches yet to be turned on, the turn-on sequence determination unit determines a turn-on priority order of the section switch based on a total capacity value of a group of transformers included in the power transmission and distribution section and information on a total capacity value of a voltage power supply that has already been electrically connected to the section switch.