| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a single-phase voltage type AC-DC conversion device and a system-interconnected system utilizing the single-phase voltage type AC-DC conversion device, capable of coping with fluctuation in AC voltage, freely controlling reactive power, and performing autonomous parallel operation. <P>SOLUTION: The single-phase voltage type AC-DC conversion device generates a second axial voltage command based on the difference between a DC voltage detection value at a DC terminal and a DC voltage command value, and increases/decreases an active power by the second axial voltage command, for controlling a DC voltage. For example, in the case where the DC voltage detection value at the DC terminal is lower than the DC voltage command, the active power is lowered to raise a voltage at the DC terminal. Conversely, in the case where the DC voltage detection value at the DC terminal is higher than the DC voltage command, the active power is increased to lower the DC voltage detection value at the DC terminal. <P>COPYRIGHT: (C)2012,JPO&INPIT |
