Patent ID: 7830683

Claim:
A current control type converter comprising: a converter section configured to convert a three-phase AC voltage into a DC voltage; and a control section that controls the converter section, the control section including a voltage controller configured to calculate and output an active current instruction value by proportional-plus-integral control to perform proportional integration of a deviation between a value of a DC voltage outputted from the converter section and a DC voltage instruction value; an active current controller configured to calculate and output an active voltage correction value by proportional-plus-integral control to perform proportional integration of a deviation between the active current instruction value from the voltage controller and a value of an active current inputted to the converter section, and a reactive current controller configured to calculate and output a reactive voltage correction value by proportional-plus-integral control to perform proportional integration of a deviation between a reactive current instruction value and a value of a reactive current inputted to the converter section, the control section being configured to output a control signal for controlling the converter section based on the active voltage correction value from the active current controller and the reactive voltage correction value from the reactive current controller, and the control section being further configured to make the active current instruction value outputted from the voltage controller zero or negative and to operate the active current controller by proportional control in a period from a beginning to a completion of startup of the converter section, or operate the voltage controller by proportional control and make the active voltage correction value outputted from the active current controller zero or negative in the period from the beginning to the completion of startup of the converter section.