Patent ID: 7847434
Filing Date: 2010-12-07
Classification: H02J,Y02E

Abstract:
1. A cogeneration system having a power plant that includes a generator connected to an AC power feed line between a power network and an electrical load and an internal combustion engine for driving the generator such that exhaust heat of the engine is supplied to a thermal load, comprising: a battery for storing DC power; an inverter that inverts DC power to AC power; a switch installed in the feed line; a power supply interrupter that interrupts power supply from the generator to the power network by turning off the switch, when an outage of the power network is detected; a battery connector that connects the battery to the inverter, such that inverted AC power of the battery and the output of the generator are supplied to the electrical load when the power supply from the generator to the power network is interrupted; a DC/DC converter connected to the battery which steps up the output of the battery to a predetermined voltage; and a second switch installed between the DC/DC converter and the inverter such that an output of the DC/DC converter is supplied to said second switch, wherein said second switch is normally turned off; wherein the inverter is an inverter circuit of the generator that inverts converted and boosted output of the generator to AC power.