| 20110187194 | EMERGENCY POWER SUPPLY SYSTEM COMPRISING A FUEL CELL - An emergency power supply system for a load connected to an AC grid (normal grid) includes a fuel cell for generating direct current, an inverter for providing alternating current, and a controller. The controller includes a synchronizing means which synchronizes the current provided by the inverter in phase with the current of the AC grid. The emergency power supply system hence is able to again provide the normal grid to the loads without further interruption. | 08-04-2011 |
