Optimal Active Power Dispatch of Wind Farms Considering Fatigue Loads

With the increasing penetration of wind power, output fluctuations and fatigue damage of wind turbines pose greater challenges to wind farm operational control. This paper proposes a fatigue-aware optimal active power dispatch method for wind farms. First, a low-complexity cumulative fatigue damage calculation model is developed, and estimation models for tower thrust and main shaft torque are established based on wind speed and power data. Then, a multi-objective active power allocation model aiming at minimizing cumulative fatigue damage is formulated. Finally, the resulting multi-constrained optimization problem is solved using a Grey Wolf Optimizer with an improved convergence factor. Simulation results on a wind farm with 80 turbines demonstrate that the proposed method can effectively reduce turbine fatigue damage while satisfying grid dispatch requirements, with computational efficiency suitable for real-time operation and good engineering applicability.