7 April 2016 Disturbance observer based pitch control of wind turbines for disturbance rejection
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Abstract
In this research, a disturbance observer based (DOB) control scheme is illustrated to reject the unknown low frequency disturbances to wind turbines. Specifically, we aim at maintaining the constant output power but achieving better generator speed regulation when the wind turbine is operated at time-varying and turbulent wind field. The disturbance observer combined with a filter is designed to asymptotically reject the persistent unknown time-varying disturbances. The proposed algorithm is tested in both linearized and nonlinear NREL offshore 5-MW baseline wind turbine. The application of this DOB pitch controller achieves improved power and speed regulation in Region 3 compared with a baseline gain scheduling PID collective controller both in linearized and nonlinear plant.
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Yuan Yuan, Yuan Yuan, Xu Chen, Xu Chen, Jiong Tang, Jiong Tang, } "Disturbance observer based pitch control of wind turbines for disturbance rejection", Proc. SPIE 9806, Smart Materials and Nondestructive Evaluation for Energy Systems 2016, 980609 (7 April 2016); doi: 10.1117/12.2219456; https://doi.org/10.1117/12.2219456
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