Power conversion device

A power conversion device comprising at least one circuit to receive a DC input voltage and perform power conversion, wherein

• each of the at least one circuit includes
• an inverter to receive the DC input voltage and generate an inverter voltage,
• a filter to receive the inverter voltage and output an output voltage,
• a detector to detect a DC component of the output voltage,
• a feedback controller to receive an AC voltage command and the DC component and determine an inverter voltage command such that the DC component is equal to a target value, and
• a PWM controller to receive the inverter voltage command and perform pulse width modulation control of the inverter,
• the target value is zero or a value corresponding to an offset error of the detector, and
• the feedback controller
• computes a compensation amount for compensating for the DC component, and
• determines, as the inverter voltage command, the AC voltage command on which a product of an absolute value of a sine wave and the compensation amount is superimposed, the sine wave being synchronized with a period of the AC voltage command.