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http://dx.doi.org/10.6113/TKPE.2015.20.1.91

Control Strategy of Improved Transient Response for a Doubly Fed Induction Generator in Medium Voltage Wind Power System under Grid Unbalance  

Han, Dae-Su (Dept. of Electrical Engineering, Smart Grid Research Center, Chonbuk Nat'l University)
Suh, Yong-Sug (Dept. of Electrical Engineering, Smart Grid Research Center, Chonbuk Nat'l University)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.20, no.1, 2015 , pp. 91-103 More about this Journal
Abstract
This paper investigates control algorithms for a doubly fed induction generator with a back-to-back three-level neutral-point clamped voltage source converter in a medium-voltage wind power system under unbalanced grid conditions. Negative sequence control algorithms to compensate for unbalanced conditions have been investigated with respect to four performance factors: fault ride-through capability, instantaneous active power pulsation, harmonic distortions, and torque pulsation. The control algorithm having zero amplitude of torque ripple indicates the most cost-effective performance in terms of torque pulsation. The least active power pulsation is produced by a control algorithm that nullifies the oscillating component of the instantaneous stator active and reactive power. A combination of these two control algorithms depending on operating requirements and depth of grid unbalance presents the most optimized performance factors under generalized unbalanced operating conditions, leading to a high-performance DFIG wind turbine system with unbalanced grid adaptive features.
Keywords
Converter; DFIG; Unbalanced grid conditions; Wind power system;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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