Control Device For Power Conversion Apparatus, And Power Conversion Apparatus

Abstract: A power conversion device control device comprising: an effective power calculation section that acquires an electric current value and a voltage value measured on an AC side of a power conversion device, and calculates an effective power value, which is a measurement value for the effective power output by the power conversion device, on the basis of the acquired electric current value and voltage value; an integration unit that acquires the effective power value from the effective power value calculation section and, only when the acquired effective power value is in a charging direction, integrates the effective power value to calculate a charging power; a gain unit that calculates a first control value obtained by multiplying the charging power integrated by the integration unit and a prescribed gain; a DC voltage determination section that acquires the first control value calculated by the gain unit, calculates a DC voltage value from the charging power on the basis of the acquired first control value, and determines whether the calculated DC voltage value is at or above a prescribed threshold value; and an addition unit that, when it is determined by the DC voltage determination section that the DC voltage value is at or above the prescribed threshold value, adds together a prescribed effective power command value and the first control value and implements P droop control.

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