| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a system interconnection device which can use a load or a switch circuit with a low breakdown voltage to which electric power is supplied when determining whether a solar battery can supply the electric power which is enough for performing interconnected operation. <P>SOLUTION: At the time of starting a system interconnection device 2, a system interconnection relay 7 is brought into an open state and a switching element 42 of a booster circuit 41 is brought into an open state, after which an inverter circuit 5 converts DC power outputted from the booster circuit 41 into AC power and supplies the AC power to an AC load 92 so that the output current of the inverter circuit 5 is gradually increased. When the AC power becomes larger than a predetermined electric power, the control of bringing the system interconnection relay 7 into a closed state and opening/closing the switching element 42 periodically is started. <P>COPYRIGHT: (C)2013,JPO&INPIT |
