Patent ID: 11888334
Assignee: CATERPILLAR INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 15:
16. A microgrid system, comprising:
a plurality of energy storage systems having different power and/or energy capacities, and different states of charge; and
a microgrid controller communicatively coupled to each energy storage system for sending information to, and receiving information from, each of the plurality of energy storage systems, the microgrid controller configured to:
allocate a total charge request and/or a total discharge request across the plurality of energy storage systems;
limit charge and/or discharge of the plurality of energy storage systems to a respective submaximal value for each of the plurality of energy storage systems, wherein the submaximal value for each of the plurality of energy storage systems is a function of the total charge and/or discharge limit of the respective one of the plurality of energy storage systems and a convergence factor; and
allocate a remainder of the total charge request and/or a remainder of the total discharge request to a subset of the plurality of energy storage systems, the subset comprising one or more energy storage systems that have not reached their respective submaximal value,
wherein the total charge and/or the total discharge request corresponds to a sum of the charge and/or discharge limits of each of the plurality of energy storage system,
wherein the limiting to the submaximal values occurs for a limited window,
wherein the limited window ends when all of the energy storage units have reached their said respective submaximal values, and
increasing the charge and/or discharge of each of the plurality of energy storage systems after the limited window to the lesser of the total charge and/or discharge limit of each of the plurality of energy storage systems and the total charge request and/or discharge request of each of the plurality of energy storage systems.