POWER CONVERSION DEVICE AND DC POWER SUPPLY SYSTEM

A power conversion device connected to a DC power source and configured to output DC power, the power conversion device including: a physical quantity acquiring unit configured to acquire a physical quantity that is power or current flowing through the power conversion device; a voltage acquiring unit configured to acquire a voltage of the power line; and a control unit configured to control the voltage. The control unit includes: a droop control unit configured to perform a droop control of reducing the voltage in accordance with a droop characteristic, a characteristic slope correction unit configured to correct a slope of the droop characteristic with respect to the physical quantity, and a characteristic reference shift setting unit configured to shift a reference point where the voltage and the physical quantity on the droop characteristic do not change when correcting the slope of the droop characteristic.