Patent ID: 11929612
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  G  Y | IPC B  G  H

Claim 14:
15. A method of managing electric power of a first power grid, the method comprising:
switching the first power grid from an isolated operation to a grid-connected operation, the first power grid being interconnected with a second power grid in the grid-connected operation; and
switching the first power grid from the grid-connected operation to the isolated operation, wherein
switching the first power grid from the isolated operation to the grid-connected operation includes:
determining a master among master candidates including a plurality of power adjustment resources electrically connectable to the first power grid based on a first parameter, the first parameter including a distance from a grid-connection point to the power adjustment resource, the grid-connection point being a point of connection between the first power grid and the second power grid;
designating as slaves, all of the master candidates not selected as the master;
carrying out master-slave control by means of the master and the slaves such that electric power of the first power grid is in synchronization with electric power of the second power grid; and
connecting the first power grid to the second power grid after synchronization under the master-slave control,

switching the first power grid from the grid-connected operation to the isolated operation includes:
determining a master among master candidates including the plurality of power adjustment resources based on a second parameter different from the first parameter, the second parameter including capacity of the power adjustment resource,
designating as slaves, all of the master candidates not selected as the master, and
disconnecting the first power grid from the second power grid after selection of the master and the slaves, and

the method further comprising:
controlling the master and the slaves to stabilize electric power of the first power grid during the isolated operation of the first power grid.