Wind power plant frequency modulation power distribution method considering historical fatigue load of unit

The invention belongs to the technical field of wind power plant active power control, and discloses a wind power plant frequency modulation power distribution method considering historical fatigue load of a unit, which comprises the following steps of: acquiring frequency data of a wind power plant grid-connected connection point, and calculating an active power change reference value delta Pfarm of a wind power plant when the frequency change exceeds a frequency modulation dead zone; and matching a unit active power optimal distribution result corresponding to the station active power change reference value delta Pfarm in the formed scene strategy set. Compared with a traditional proportional distribution scheme, the distribution method has the advantages that the system frequency response requirement is met, meanwhile, the problems that the fatigue load of the wind power plant is sharply increased and the accumulated fatigue difference between the units is large are solved, and the effectiveness of the met