CONTROLLED SINGLE-PHASE AC/DC CONVERTER

A single-phase voltage source AC/DC converter (40) according to the present invention generates a second axis voltage command from difference between a DC voltage detection value (31,V D ) at a DC terminal (22) and a DC voltage command value V D * and controls a DC voltage by increasing and decreasing active power with the second axis voltage command (120-2). For example, the voltage at the DC terminal (22) is increased by decreasing active power when the DC voltage detection value V D at the DC terminal is lower than the DC voltage command V D * , while the DC voltage detection value V D at the DC terminal is decreased by increasing the active power when the DC voltage detection value V D at the DC terminal is higher than the DC voltage command V D * .