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Direct Active and Reactive Power Regulation of DFIG Using Sliding-Mode Control Approach

    Direct Active and Reactive Power Regulation of
    DFIG Using Sliding-Mode Control Approach
    Jiabing Hu, Member, IEEE, Heng Nian, Member, IEEE, Bin Hu, Yikang He, Senior Member, IEEE,
    and Z. Q. Zhu, Fellow, IEEE
    Abstract—This paper presents a new direct active and reactive
    power control (DPC) of grid-connected doubly fed induction generator
    (DFIG)-based wind turbine systems. The proposed DPC
    strategy employs a nonlinear sliding-mode control scheme to directly
    calculate the required rotor control voltage so as to eliminate
    the instantaneous errors of active and reactive powers without
    involving any synchronous coordinate transformations. Thus, no
    extra current control loops are required, thereby simplifying the
    system design and enhancing the transient performance. Constant
    converter switching frequency is achieved by using space vector
    modulation, which eases the designs of the power converter and the
    ac harmonic filter. Simulation results on a 2-MW grid-connected
    DFIG system are provided and compared with those of classic
    voltage-oriented vector control (VC) and conventional lookup table
    (LUT) DPC. The proposed DPC provides enhanced transient
    performance similar to the LUT DPC and keeps the steady-state
    harmonic spectra at the same level as the VC strategy.
    Index Terms—Constant switching frequency, direct power control
    (DPC), doubly fed induction generators (DFIGs), sliding-mode
    control (SMC), wind power.


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    برچسب ها : control ,power ,member ,ieee ,sliding ,active ,member ieee ,switching frequency ,mode control ,sliding mode ,direct active ,
    Direct Active and Reactive Power Regulation of DFIG Using Sliding-Mode Control Approach

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