Method for allocating reactive power tasks of draught fan group

The invention provides a method for allocating the reactive power tasks of a draught fan group. The method comprises the following steps: acquiring a total reactive power demand of a point of interconnection (POI); allocating a reactive power task for each wind-power collection line according to the total reactive power demand of the POI and a reactive power capacity of each wind-power collection line; and allocating a reactive power task for each draught fan in an operating state in each wind-power collection line according to the reactive power task allocated for each wind-power collection line and the reactive power capacity of each draught fan in an operating state in each wind-power collection line.