| 摘要 |
PROBLEM TO BE SOLVED: To provide a system interconnection power conditioner that can operate even in a period with a smaller amount of solar radiation such as morning and evening, thereby effectively using power generated by a solar cell.SOLUTION: A power conditioner 1 includes: an inverter 5 for converting DC power generated by a solar cell 2 into AC power on the basis of an output current command value; and control means 7 for measuring an output voltage of the solar cell 2 and transmitting the output current command value to the inverter 5. When the DC power output is low because of low-level solar radiation, the control means 7 monitors an amount &Dgr;V of change of the output voltage of the solar cell 2 from an open-circuit voltage Voc, the change accompanying power conversion operation of the inverter 5 based on the output current command value, and increases or decreases the output current command value according to the amount of change. Repeating the output operation enables power to be output at all times without waiting for solar radiation to be stable even when the amount of solar radiation is small. |
