POWER CONVERSION DEVICE

A power conversion device according to one embodiment of the present invention comprises: an input unit which is connected to a DC link end, and which receives voltage and current of the DC link end; a power conversion unit for converting the voltage of the DC link end; an output unit for outputting the converted voltage; and a control unit, which compares the voltage of the DC link end to a reference voltage, uses the difference between the voltage of the DC link end the reference voltage so as to control the power conversion unit, and uses the current of the DC link end according to operation of the power conversion unit so as to adjust the reference voltage.