Journal of the Korean Institute of Illuminating and Electrical Installation Engineers (조명전기설비학회논문지)

The Korean Institute of IIIuminating and Electrical Installation Engineers (한국조명전기설비학회)
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A DVR Control for Compensating Unbalanced Voltage Dips of a DFIG System using Zero Sequence Components

  • Thinh, Quach Ngoc (Department of Electrical Engineering, Jeju National University) ;
  • Ko, Ji-Han (Department of the Multidisciplinary Graduate School Program for Wind Energy, Jeju National University) ;
  • Kim, Dong-Wan (Department of the Multidisciplinary Graduate School Program for Wind Energy, Jeju National University) ;
  • Kim, Eel-Hwan (Department of Electrical Engineering, Jeju National University)
  • Received : 2012.11.07
  • Accepted : 2013.01.07
  • Published : 2013.02.28
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Abstract

The dynamic voltage restorer (DVR) is an effective protection device for wind turbine generators based on doubly-fed induction generator (DFIG) that is operated under unbalanced voltage dip conditions. The compensating voltages of the DVR depend on the voltage dips and on the influence of the zero sequence component. The zero sequence component results in high insulation costs and asymmetry in terminal voltages. This paper proposes the use of a proportional-resonant controller in stationary reference frames for controlling zero sequence components in the DVR to protect the DFIG during unbalanced voltage dips. To enhance the proposed control method, a comparison is carried out between two cases: with and without using the control of a zero sequence component. Simulation results are presented to verify the effectiveness of the proposed control method by using the Psim simulation program.

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References

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