| 摘要 |
PROBLEM TO BE SOLVED: To obtain a system interconnection inverter device capable of suppressing inrush current regardless of a circuit configuration.SOLUTION: A system interconnection inverter device comprises: a first voltage detection unit 7 for detecting a first voltage on the AC power system 2 side from an interconnection switch 6; a second voltage detection unit 8 for detecting a second voltage on the inverter circuit 5 side from the interconnection switch 6; and a switching control unit 10 that operates a first effective value and first average value from the first voltage, operates a second effective value and second average value from the second voltage, and controls output of an instruction for the interconnection switch 6 input from an inverter control unit 9 for controlling the interconnection switch 6, on the basis of a result obtained by comparing an effective value difference absolute value, which is an absolute value of a difference between the first effective value and the second effective value, with an effective value threshold showing an allowable range of a difference between effective values and a result obtained by comparing an average value difference absolute value, which is an absolute value of a difference between the first average value and the second average value, with an average value threshold showing an allowable range of a difference between average values.SELECTED DRAWING: Figure 1 |
