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- W2912262044 abstract "With the fast development of tidal turbines for sustainable energy generations, reliable and efficient tidal pitch systems are highly demanded. This paper presents a systematic design for a novel tidal pitch system based on hydraulic servo and bevel geared transmission. This system holds the characteristics of compact and triangular structure, making it easy to be installed in a narrow turbine hub. The pitch system dynamics are modeled by taking account of model uncertainties and external disturbances. An uncertainty and disturbance estimator (UDE)-based robust pitch control algorithm is developed to achieve effective pitch angle regulation, disturbance rejection, and generator power smoothing. The UDE controller is designed in a composite hierarchical manner that includes an upper level power smoothing controller and a low-level pitch angle tracking controller. The performance of the proposed pitch system and the UDE control is demonstrated through extensive simulation studies based on a 600-kW tidal turbine under varying tidal speeds. Compared with the conventional controller, the UDE-based pitch controller can achieve more reliable power smoothing and pitch angle tracking with higher accuracy." @default.
- W2912262044 created "2019-02-21" @default.
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- W2912262044 date "2020-01-01" @default.
- W2912262044 modified "2023-10-18" @default.
- W2912262044 title "Composite Hierarchical Pitch Angle Control for a Tidal Turbine Based on the Uncertainty and Disturbance Estimator" @default.
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- W2912262044 doi "https://doi.org/10.1109/tie.2019.2896261" @default.
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