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Sensorless Control of Brushless Doubly Fed Induction Generator with Nonlinear Loads for Stand-Alone Power Generation Systems

Author

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  • Wantai Liu
  • Weicai Xie
  • Yunong Lv
  • Zhan Zhou

Abstract

This paper presents a sensorless control scheme for the stand-alone brushless doubly fed induction generator (BDFIG) feeding nonlinear loads. The fundamental and harmonic components of the distorted power winding (PW) voltage caused by the nonlinear loads are extracted and controlled separately. A rotor speed observer is employed to estimate the speed based on the PW voltage and control winding (CW) current without the need of any other machine parameters except for the number of pole pairs. Since the d - and q -axis references of the CW current from the PW voltage control loop contain both dc and ac components, which cannot be tracked easily by conventional PI controllers, a CW predictive current controller is designed to regulate the CW current. Finally, the performance of the proposed control scheme is verified by comprehensive experiments on a 35-kVA prototype BDFIG.

Suggested Citation

  • Wantai Liu & Weicai Xie & Yunong Lv & Zhan Zhou, 2020. "Sensorless Control of Brushless Doubly Fed Induction Generator with Nonlinear Loads for Stand-Alone Power Generation Systems," Mathematical Problems in Engineering, Hindawi, vol. 2020, pages 1-13, July.
    • Handle: RePEc:hin:jnlmpe:6507593
    DOI: 10.1155/2020/6507593
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