Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Three-Phase Three-Switch Buck-Type Rectifier Based on Current Source Converter for 5MW PMSG Wind Turbine Systems

  • Chae, Beomseok (Department of Electrical Engineering, Chonbuk National University) ;
  • Suh, Yongsug (Department of Electrical Engineering, Chonbuk National University) ;
  • Kang, Tahyun (R&D Center, Milimsyscon)
  • Received : 2018.03.15
  • Accepted : 2018.05.31
  • Published : 2018.09.20
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Abstract

This paper proposes a three-phase three-switch buck-type converter as the MSC of a wind turbine system. Owing to a novel switching modulation scheme that can eliminate the unwanted diode rectifier mode switching state, the proposed system exhibits a satisfying ac voltage and current waveform quality and torque ripple up to the level of a typical current source rectifier even under a wide power factor operating range. The proposed system has been verified through simulations and HILS tests on a PMSG wind turbine model of 5MW/4160V. The proposed converter has been shown to provide a stator current THD of 3.9% and a torque ripple of 1% under the rated power condition. In addition to the inherent advantage of the reduced switch count of three-phase three-switch buck-type converters, the proposed switching modulation technique can make this converter a viable solution for the MSC placed inside of a nacelle, which is under severe volume, weight and mechanical vibration design limits.

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References

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