| 摘要 |
PROBLEM TO BE SOLVED: To obtain a system interconnection inverter device capable of accurately detecting a state of a load while suppressing increase in cost.SOLUTION: A system interconnection inverter device comprises a converter circuit 2a, an inverter circuit 2b, and a control unit 6a. The control unit 6a determines whether a state of a load connected to the converter circuit 2a is a light load state or a heavy load state, by using at least one of a DC voltage detected between a DC power supply and the converter circuit 2a, the DC power supply's output current detected between the DC power supply and the converter circuit 2a, an AC voltage detected between the inverter circuit 2b and a power system, and the inverter circuit 2b's output current detected between the inverter circuit 2b and the power system.SELECTED DRAWING: Figure 1 |
