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Automatika : journal for control, measurement, electronics, computing and communications, Vol. 54 No. 1, 2013.

Original scientific paper

https://doi.org/10.7305/automatika.54-1.325

Fault-tolerant Control of a Wind Turbine with Generator Stator Inter-turn Faults

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
Gojko Joksimović orcid id orcid.org/0000-0002-2764-1540 ; Faculty of Electrical Engineering, University of Montenegro, Džordža Vašingtona bb, ME-81000, Podgorica, Montenegro
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

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Abstract

Faults of wind turbine generator electromechanical parts are common and very expensive. This paper introduces a generator fault-tolerant control scheme for variable-speed variable-pitch wind turbines that can be applied regardless to the AC generator used. The focus is on generator stator isolation inter-turn fault that can be diagnosed and characterised before triggering the safety device. An extension of the conventional wind turbine control structure is proposed that prevents the fault propagation while power delivery under fault is deteriorated as less as possible compared to healthy machine conditions. Fault-induced and inherent asymmetries of the generator are estimated and respected by the field-oriented control of the generator to eliminate torque oscillations. An approach for asymmetry detection based on an unscented Kalman filter is proposed. 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 exploitable life span and increase energy production. Simulation results for the case of a megawatt class wind turbine are presented.

Keywords

Wind turbine control; Generator fault-tolerant control; Stator winding isolation fault; Nonlinear estimation; Asymmetric field-oriented control

Hrčak ID:

100202

URI

https://hrcak.srce.hr/100202

Publication date:

4.4.2013.

Article data in other languages: croatian

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