Power coordinated control method and device for LCC-VSC direct current transmission system

The invention relates to a power coordinated control method and device for an LCC-VSC direct current transmission system, and belongs to the technical field of direct current transmission. When one pole of a VSC end converter station in an active power control mode is stopped and the other pole of the VSC end converter station is in a bipolar active power control mode, the active power reference value of the pole is correspondingly adjusted according to the bipolar active power control mode; when the other pole of the VSC converter station is in a unipolar active power control mode, the activepower reference value of the pole is unchanged; when the control mode of an LCC converter station is a bipolar active power control mode and is forcibly switched into a unipolar active power controlmode, the active power reference value of each pole of the LCC end converter station is correspondingly adjusted according to the unipolar active power control mode; and the VSC end converter stationin a direct-current voltage