A method and system are described for providing a direct current (DC) uninterruptible power supply with the method including, for example: continuously supplying fuel to a turbine; converting mechanical power from the turbine into alternating current (AC) electrical power; converting the AC electrical...http://www.google.ca/patents/US6657321?utm_source=gb-gplus-sharePatent US6657321 - Direct current uninterruptible power supply method and system