An active damper for stabilizing power-electronics-based AC systems

Xiongfei Wang, Frede Blaabjerg, Marco Liserre, Zhe Chen, Jinwei He, Yunwei Li

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233 Citations (Scopus)
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The interactions among the parallel grid-connected converters coupled through the grid impedance tend to result in stability and power quality problems. To address them, this paper proposes an active damper based on a high bandwidth power electronics converter. The general idea behind this proposal is to dynamically reshape the grid impedance profile seen from the point of common coupling of the converters, such that the potential oscillations and resonance propagation in the parallel grid-connected converters can be mitigated. To validate the effectiveness of the active damper, simulations and experimental tests on a three-converter-based setup are carried out. The results show that the active damper can become a promising way to stabilize the power-electronics-based ac power systems.
Original languageEnglish
JournalI E E E Transactions on Power Electronics
Issue number7
Pages (from-to)3318-3329
Number of pages12
Publication statusPublished - Jul 2014


  • Grid-connected converters
  • Grid impedance
  • Paralleled operation
  • Stability
  • Resonance propagation

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