作者: Hailiang Xu , Jiabing Hu , Yikang He
DOI: 10.1109/TPEL.2011.2174255
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摘要: This paper presents enhanced control strategies for doubly fed induction generator (DFIG)-based wind power generation systems under distorted grid voltage conditions. The mathematical model of DFIG, in view the fifth- and seventh-order components harmonics, is proposed analyzed detail. Based on analytical model, further studies are conducted distortions stator/rotor currents oscillations stator active/reactive powers as well electromagnetic torque, where impact DFIG's load conditions considered. Meanwhile, alternative rotor current references calculated to enhance uninterruptable operation capability wind-turbine-driven DFIG An improved software PLL designed, which capable accurately rapidly tracking frequency phase angle fundamental A proportional integral plus resonant (PI-R) controller synchronously rotating (dq) reference frame employed simultaneously regulate harmonic without any sequential component decomposition. Experiment results a 3-kW prototype demonstrate correctness effectiveness PI-R when distorted.