Abstract：To mitigate the fatigue load generated by wind turbine participation in primary frequency regulation，

a primary frequency regulation strategy considering the fatigue load of wind turbine was proposed based on the

mechanical dynamic response characteristics and control device operation characteristics of wind turbine under

different wind speeds. Firstly，based on the dynamic response characteristics and primary frequency regulation

control device operation characteristics of grid-connected wind turbine，the fatigue load model of wind turbine was

derived. Secondly，by constructing the state space model of wind turbine，the primary frequency regulation and

fatigue load of wind turbine were transformed into a multi-constraint multi-objective optimization mathematical

model. Based on the model predictive control（MPC），the dynamic frequency deviation was reduced while the

fatigue load of wind turbine was lowered. Finally，based on the Matlab/Simulink platform，the frequency regulation

capability and fatigue load of wind turbine under different control strategies were compared through time-domain

simulation and analysis. The results show that the proposed control strategy is more effective than the existing

control strategy in improving the frequency response capability of wind turbine and reducing the fatigue load of

wind turbine，thereby extending the service life of wind turbine.

      Key words：fatigue load；model predictive control（MPC）；primary frequency regulation；doubly-fed induction generator（DFIG）