Primary and secondary frequency modulation cooperative control method for hydroelectric generating set

The invention relates to the technical field of power systems, in particular to a primary and secondary frequency modulation cooperative control method for a hydroelectric generating set. The controlmethod comprises the steps: determining the secondary frequency modulation state of the hydroelectric generating set; determining a control mode of the hydroelectric generating set; determining a primary frequency modulation state of the hydroelectric generating set; judging whether the primary and secondary frequency modulation action directions of the hydroelectric generating set are opposite ornot; and controlling the hydroelectric generating set according to the principle that the primary frequency modulation action direction and the secondary frequency modulation action direction are opposite, primary frequency modulation is preferred, and the primary frequency modulation action direction and the secondary frequency modulation action direction are the same and do not influence each other. Two different contro