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A linear model for individual pitch of wind turbine system was established，and the loads of blade roots were transferred into a mean value and variations on two orthogonal axis using Park’s transformation. The model-free adaptive controllers (MFA) were designed to control the loads components of the two orthogonal axes. The wind turbine nonlinear model FAST built by NREL was used to verify the controller. Test results showed that individual pitch based on MFA could eliminate the imbalance loads effectively. Compared to collective pitch control, the for-aft torque was decreased by 62.5%, yaw torque was decreased by 60.1%, and the value of output power changed a little.