COOPERATIVE CONTROL OF WIND TURBINE MPPT AND TORSIONAL VIBRATION BASED ON LINEAR ACTIVE DISTURBANCE REJECTION
Aiming at the problem of coupling between MPPT and torsional vibration control loop and disturbance suppression in the operation process,a cooperative control method of MPPT and torsional vibration of wind turbine based on linear active disturbance rejection is proposed.The unknown input observer is designed and combined with the Newton-Raphson algorithm to estimate the effective wind speed for the tip speed ratio method MPPT,and the Kalman filter is designed to estimate the torsional speed of the drivetrain for the torsional vibration control loop.The simulation research is carried out based on the 5 MW wind turbine model in FAST.The simulation case shows that compared with the traditional method,the power generation of the proposed method is increased by 1.58% .After the introduction of the torsional vibration controller,the standard deviation of the torsional speed and torsion angle is reduced by 31.06% and 0.50%,respectively,which improves the MPPT performance and suppresses the drivetrain torsional vibration.
wind turbinesmaximum power point trackerstorque controltorsional vibration controleffective wind speed estimationlinear active disturbance rejection control
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