Patent ID: 11921482
Assignee: HITACHI ENERGY LTD
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H  Y | IPC G

Claim 10:
11. A microgrid, comprising:
a plurality of controllable assets;
an energy management system, EMS, comprising:
an interface operative to retrieve a forecast variable value for at least one forecast variable; and
at least one integrated semiconductor circuit operative to
execute an optimization routine to determine an operating point vector for the plurality of controllable assets that is optimal for the retrieved forecast variable value, the operating point vector including an operating point value for each of the plurality of controllable assets;
execute the optimization routine to determine several additional operating point vectors for the plurality of controllable assets, the additional operating point vectors being determined to be optimal for modified forecast variable values that deviate from the retrieved forecast variable value; and
provide the operating point vector and the several additional operating point vectors to a power management system, PMS, of the microgrid;

the PMS comprising:
an interface operative to receive operating point values for a plurality of controllable assets of the microgrid; and
at least one integrated semiconductor circuit operative to:
determine an asset headroom that is dependent on a difference between an asset-specific fixed parameter value for the controllable asset and the received operating point value for the controllable asset;
determine a modified operating point value for each controllable asset of at least a sub-set of the plurality of controllable assets, the modified operating point value for a controllable asset being dependent on the received operating point value of the controllable asset, the asset headroom of the controllable asset, and a total power offset of the microgrid, wherein the PMS is operative such that determining the modified operating point value comprises determining a product of the total power offset of the microgrid and an asset-specific scaling factor, the asset-specific scaling factor being dependent on the asset headroom; and
control the controllable assets for which the modified operating point values have been determined in accordance with the modified operating point values.