Nonlinear PI control for variable pitch wind turbine

Ren, Yaxing, Li, Liuying, Brindley, Joseph and Jiang, Lin ORCID: 0000-0001-6531-2791 (2016) Nonlinear PI control for variable pitch wind turbine CONTROL ENGINEERING PRACTICE, 50. pp. 84-94. ISSN 0967-0661, 1873-6939

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Abstract

Wind turbine uses a pitch angle controller to reduce the power captured above the rated wind speed and release the mechanical stress of the drive train. This paper investigates a nonlinear PI (N-PI) based pitch angle controller, by designing an extended-order state and perturbation observer to estimate and compensate unknown time-varying nonlinearities and disturbances. The proposed N-PI does not require the accurate model and uses only one set of PI parameters to provide a global optimal performance under wind speed changes. Simulation verification is based on a simplified two-mass wind turbine model and a detailed aero-elastic wind turbine simulator (FAST), respectively. Simulation results show that the N-PI controller can provide better dynamic performances of power regulation, load stress reduction and actuator usage, comparing with the conventional PI and gain-scheduled PI controller, and better robustness against of model uncertainties than feedback linearization control.

Item Type:	Article
Uncontrolled Keywords:	Nonlinear PI, Extended-order state and perturbation observer, Pitch angle control, Wind turbines, FAST
Depositing User:	Symplectic Admin
Date Deposited:	26 Apr 2016 11:01
Last Modified:	16 Jun 2026 08:28
DOI:	10.1016/j.conengprac.2016.02.004
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3000883
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