Patent ID: 11955835
Assignee: ABB SCHWEIZ AG
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G  Y | IPC G  H

Claim 0:
1. A system comprising:
a ring bus;
a plurality of static uninterruptible power supplies (UPSs), each static UPS of the plurality of static UPSs comprising:
at least one battery;
an input that is electrically connected to a respective first external electrical power source; and
an output that is electrically connected to a respective load, and, via a first corresponding unswitchable choke, without any intervening switch to the ring bus;

at least one fuel-cell interface converter (FIC) that converts direct current (DC) electrical power to alternating current (AC) electrical power, each FIC of the at least one FIC being electrically connected to the ring bus via a second corresponding unswitchable choke, without any intervening switch to the ring bus; and
a respective fuel cell module corresponding to and electrically connected to each FIC, each fuel cell module comprising a respective fuel cell,
wherein each FIC of the at least one FIC supplies AC electrical power to one or more of the respective loads indirectly via the ring bus and does not directly supply any other AC electrical load.