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  • improved rotor current control of wind turbine driven doubly-fed induction generators during network voltage unbalance

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 986
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
    this paper investigates an improved control and operation of a doubly-fed induction generator (dfig)system under unbalanced network conditions. a new rotor current control scheme is presented, whichconsists of a main controller and an auxiliary compensator. the main controller is constructed in thesame way as the conventional vector control design without involving sequential-component decompositionin order to guarantee system stability and high transient response. while the auxiliary controlleris specially designed to control the negative sequence current taking into account the impact of the maincontroller on negative sequence components. simulated results on a commercial 1.5-mw dfig systemand experimental tests on a 1.5-kw dfig prototype are provided and compared with those of conventionalvector control and dual pi current control schemes to demonstrate the effectiveness of the proposedcontrol strategy during steady-state and transient conditions when the network voltage isunbalanced.

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