| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device for a power converter that can quickly suppress oscillation and stabilize DC power transmission in a case where a DC current is oscillated.SOLUTION: A control device Cb for a power converter 2b that is an inverse converter for converting a DC power into an AC power, of two power converters 2a and 2b connected with each other via a DC line 3a, comprises: a constant margin angle control circuit 10b that performs control so that a margin angle of the power converter becomes constant; a constant voltage control circuit 11b that performs control so that a DC voltage of the DC line 3a becomes a predetermined DC voltage reference value; a constant current control circuit 12b that performs control so that a DC current of the DC line 3a becomes a predetermined DC current reference value; a vibration suppression circuit 20 that outputs a differential value of a DC current at an inverse converter end; an adder 15b that adds an output of the constant voltage control circuit 11b and an output of the vibration suppression circuit 20; and a minimum value selection circuit 13b that selects a minimum value from an output of the constant margin angle control circuit 10b, an output of the adder 15b, and an output of the constant current control circuit 12b, and sets the minimum value to a control angle of the power converter 2b.SELECTED DRAWING: Figure 1 |
