Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Active Damping for Wind Power Systems with LCL Filters Using a DFT

  • Lee, June-Seok (School of Electrical and Computer Engineering, Ajou University) ;
  • Jeong, Hae-Gwang (School of Electrical and Computer Engineering, Ajou University) ;
  • Lee, Kyo-Beum (School of Electrical and Computer Engineering, Ajou University)
  • Received : 2011.08.12
  • Published : 2012.03.20
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Abstract

This paper proposes a simple active damping algorithm for small-scale wind power systems with an LCL filter. Compared to an L filter or an LC filter, an LCL filter can decrease the harmonics induced by low switching frequencies and produce a satisfactory grid-side current using a comparatively low inductance. Additional active damping of the filter resonance is necessary when an LCL filter is used. This paper introduces an active damping method using a Discrete Fourier Transform (DFT) filter to improve performance without additional sensors or complexity. Experimental results are shown to verify the validity of the proposed algorithm as an active damping method.

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References

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