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Dual Robust Control of Grid-Connected DFIGs-Based Wind- Turbine-Systems under Unbalanced Grid Voltage Conditions

In: Stability Control and Reliable Performance of Wind Turbines

Author

Listed:
  • Kerrouche Kamel Djamel Eddine
  • Lina Wang
  • Alex Van den Bossche
  • Azzedine Draou
  • Abdelkader Mezouar
  • Larbi Boumediene

Abstract

In this chapter, a comparative analysis is made for doubly-fed induction-generator (DFIG) low-voltage ride-through (LVRT) solutions. It is supposed to improve the LVRT capability of DFIG under unbalanced grid voltage conditions by hardware or software solutions. Therefore, this chapter proposes a low-cost software LVRT solution based on an efficient control scheme of DFIG driven by a wind turbine. The proposed control scheme is based on dual-sequence decomposition technique and Lyapunov-based robust control (RC) theory. Under an unbalanced grid voltage conditions, the proposed control strategy not only eliminates effectively the oscillations of the active and reactive powers exchanged between the generator and the grid but also achieves the symmetrical and sinusoidal grid currents injection. Simulation analysis under MATLAB®/Simulink® has been carried out on a 1.5 MW DFIG-based wind-turbine-systems, and the results are presented and discussed to demonstrate the feasibility and the efficiency of the control strategy for a grid-connected application under unbalanced voltage supply. The proposed dual control scheme is shown to be able to successfully mitigate torque, stator power and currents pulsations as compared with the conventional vector control based on the single control scheme.

Suggested Citation

  • Kerrouche Kamel Djamel Eddine & Lina Wang & Alex Van den Bossche & Azzedine Draou & Abdelkader Mezouar & Larbi Boumediene, 2018. "Dual Robust Control of Grid-Connected DFIGs-Based Wind- Turbine-Systems under Unbalanced Grid Voltage Conditions," Chapters, in: Kenneth Eloghene Okedu (ed.), Stability Control and Reliable Performance of Wind Turbines, IntechOpen.
    • Handle: RePEc:ito:pchaps:142214
    DOI: 10.5772/intechopen.75518
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    More about this item

    Keywords

    DFIG; LVRT; unbalanced grid voltage; robust control;
    All these keywords.

    JEL classification:

    • Q20 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Renewable Resources and Conservation - - - General
    • Q40 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Energy - - - General

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