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Automatika : journal for control, measurement, electronics, computing and communications, Vol. 54 No. 3, 2013.

Original scientific paper

https://doi.org/10.7305/automatika.54-3.189

Fault-tolerant Control of a Wind Turbine with a Squirrel-cage Induction Generator and Rotor Bar Defects

Vinko Lešić orcid id orcid.org/0000-0003-1595-6016 ; Department of Control and Computer Engineering, Faculty of Electrical Engineering and Computing, University of Zagreb, Unska 3, HR-10000, Zagreb, Croatia
Mario Vašak ; Department of Control and Computer Engineering, Faculty of Electrical Engineering and Computing, University of Zagreb, Unska 3, HR-10000, Zagreb, Croatia
Nedjeljko Perić orcid id orcid.org/0009-0006-6466-2937 ; Department of Control and Computer Engineering, Faculty of Electrical Engineering and Computing, University of Zagreb, Unska 3, HR-10000, Zagreb, Croatia
Thomas M. Wolbank ; Institute of Energy Systems and Electrical Drives, Faculty of Electrical Engineering and Information Technology, Vienna University of Technology, Gusshausstrasse 25/370-2, AT-1040, Vienna, Austria
Gojko Joksimović orcid id orcid.org/0000-0002-2764-1540 ; Faculty of Electrical Engineering, University of Montenegro, Džordža Vašingtona bb, ME-81000, Podgorica, Montenegro

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Abstract

Wind turbines are usually installed on remote locations and in order to increase their economic competence malfunctions should be reduced and prevented. Faults of wind turbine generator electromechanical parts are common and very expensive. This paper proposes a fault-tolerant control strategy for variable-speed variable-pitch wind turbines in case of identified and characterised squirrel-cage generator rotor bar defect. An upgrade of the torque control loop with flux-angle-based torque modulation is proposed. In order to avoid or to postpone generator cage defects, usage of pitch controller in the low wind speed region is introduced. Presented fault-tolerant control strategy is developed taking into account its modular implementation and installation in available control systems of existing wind turbines to extend their life cycle and energy production. Practical implementation aspects such as estimation of variables used in control and estimate errors are considered and respected in operation, as well as fault-induced asymmetries. Simulation results for the case of a megawatt class wind turbine and the identified rotor bar fault are presented.

Keywords

Wind turbine control; Torque control; Generator fault-tolerant control; Nonlinear estimation; Asymmetric field-oriented control

Hrčak ID:

110174

URI

https://hrcak.srce.hr/110174

Publication date:

3.10.2013.

Article data in other languages: croatian

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