Patent ID: 11876435
Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. An energy storage system including a plurality of DC power supplies and a common DC bus, the energy storage system comprising, for each of the plurality of DC power supplies:
a DC/DC converter provided between the DC power supply and the DC bus;
a control unit configured to control the DC/DC converter; and
a management control unit configured to determine voltage detection deviations for the DC bus corresponding to individual output deviations compared to an entirety of a plurality of DC/DC converters present in parallel, and give correction values for reducing the voltage detection deviations to the respective control units for the plurality of DC/DC converters, wherein
the control unit corrects a voltage detection value for the DC bus based on the respective correction value, and controls the corresponding DC/DC converter in accordance with a voltage command value having droop characteristics with respect to output power.