| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a system interconnection inverter device which can surely detect single operation in a short time in case that a single operation state occurs in condition that the output is small and the load of a rotating machine is connected. <P>SOLUTION: A functional ripple making part 20 determines the amount of ripple to be given to the output of an inverter part 2a may be larger as the output current of the inverter part 2a gets smaller, so that the ripple arising in the voltage of an interconnection point detected by a voltage detector 2c may appear greatly when a commercial power system 3 stops and the inverter part 2a is operating singly, in case that the output of the inverter part 2a is small. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
