POWER CONVERSION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a power conversion device that allows accurately determining the presence or absence of abnormality without using an output current.SOLUTION: A power conversion device 1 includes a transformer 10, a DC/AC conversion circuit 11, an AC/DC conversion circuit 12, and a control circuit 13. The control circuit 13 calculates an input current command Iref on the basis of deviation between an output voltage of the AC/DC conversion circuit 12 and an output voltage command. Then, the control circuit 13 compares an input current Iin of the DC/AC conversion circuit 11 with the input current command Iref by using a comparator 135, and controls the DC/AC conversion circuit 11 on the basis of the comparison result. The control circuit 13 determines the presence or absence of abnormality on the basis of operating state of the comparator 135, deviationΔV between an output voltage Vout of the AC/DC conversion circuit 12 and an output voltage command Vref, and an input voltage Vin, thereby accurately determining the presence or absence of abnormality without using an output current.