Hydropower station generator set control method and system

The invention relates to the field of hydropower station control, and provides a hydropower station generator set control method and system. The method comprises the following steps: dividing a hydroelectric generating set of a power station into a normal state and an old state according to the aging state; then, a first objective function with the minimum cost is established, and a second objective function and a third objective function with the minimum adjustment times are established corresponding to the normal state and the old state respectively; meanwhile, power constraints and vibration area constraints of the generator set are considered, and constraint conditions are established. Then, according to the constraint condition and the target function, the adjusting power of the generator set in the normal state and the adjusting power of the generator set in the old state are calculated. The power of the generator set in the normal state is adjusted preferentially, and when the power of the generator se