Sliding-mode control of a DFIG-based wind turbine under non-ideal grid voltages

M.I. Martinez, Ann Susperregui, Gerardo Tapia, Lie Xu

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

Control algorithms for the rotor- and grid-side power converters of a double-fed induction generator (DFIG)-based wind turbine under non-ideal grid voltage conditions are proposed, and guidelines for tuning the controller parameters are presented. The control schemes are based on sliding-mode control (SMC) theory. Apart from directly controlling the DFIG's average active and reactive powers, the proposed methods also fulfil two additional control targets during voltage unbalance and harmonic distortion, that is, the rotor-side converter (RSC) eliminating electromagnetic torque fluctuations and the gridside converter (GSC) compensating for the stator current harmonics to ensure a sinusoidal total current from the overall generating unit. The described control strategies are proved to be robust against parameter deviations and of fast dynamic response. In spite of the discontinuous nature of the standard SMC, constant converter switching frequency is achieved. Besides, the RSC control algorithm does not require a phase-locked loop and, furthermore, there is no need for decomposing the grid voltage and different currents into symmetrical sequences or harmonic components in any of the converters' control systems. Finally, the excellent performance of the system, as well as its robustness, is verified by means of simulation results under different grid voltage conditions.
LanguageEnglish
Pages370-379
Number of pages10
JournalIET Renewable Power Generation
Volume7
Issue number4
DOIs
Publication statusPublished - Jul 2013

Fingerprint

Asynchronous generators
Sliding mode control
Wind turbines
Rotors
Electric potential
Harmonic distortion
Power converters
Switching frequency
Phase locked loops
Reactive power
Control theory
Stators
Dynamic response
Torque
Tuning
Control systems
Controllers

Keywords

  • Sliding-mode control
  • wind turbine-driven
  • double-fed induction generator
  • non-ideal grid voltages

Cite this

Martinez, M.I. ; Susperregui, Ann ; Tapia, Gerardo ; Xu, Lie. / Sliding-mode control of a DFIG-based wind turbine under non-ideal grid voltages. In: IET Renewable Power Generation. 2013 ; Vol. 7, No. 4. pp. 370-379.
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Sliding-mode control of a DFIG-based wind turbine under non-ideal grid voltages. / Martinez, M.I.; Susperregui, Ann; Tapia, Gerardo; Xu, Lie.

In: IET Renewable Power Generation, Vol. 7, No. 4, 07.2013, p. 370-379.

Research output: Contribution to journalArticle

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AB - Control algorithms for the rotor- and grid-side power converters of a double-fed induction generator (DFIG)-based wind turbine under non-ideal grid voltage conditions are proposed, and guidelines for tuning the controller parameters are presented. The control schemes are based on sliding-mode control (SMC) theory. Apart from directly controlling the DFIG's average active and reactive powers, the proposed methods also fulfil two additional control targets during voltage unbalance and harmonic distortion, that is, the rotor-side converter (RSC) eliminating electromagnetic torque fluctuations and the gridside converter (GSC) compensating for the stator current harmonics to ensure a sinusoidal total current from the overall generating unit. The described control strategies are proved to be robust against parameter deviations and of fast dynamic response. In spite of the discontinuous nature of the standard SMC, constant converter switching frequency is achieved. Besides, the RSC control algorithm does not require a phase-locked loop and, furthermore, there is no need for decomposing the grid voltage and different currents into symmetrical sequences or harmonic components in any of the converters' control systems. Finally, the excellent performance of the system, as well as its robustness, is verified by means of simulation results under different grid voltage conditions.

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