Impedance Modeling for Three-Phase Inverters with Double Synchronous Reference Frame Current Controller in the Presence of Imbalance

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Abstract

This article presents a small-signal model for power-electronics converters that use a typical control structure in wind energy applications: the double synchronous reference frame current control. The article considers the presence of unbalanced currents and voltages, and analyzes their impact on the frequency couplings of the converter. In addition, it is revealed that, in the presence of negative-sequence voltage synchronization, the converter presents an additional coupling at -2f_1-f_p.

Original languageEnglish
Article number9521843
Pages (from-to)1461-1475
Number of pages15
JournalIEEE Transactions on Power Electronics
Volume37
Issue number2
DOIs
Publication statusE-pub ahead of print - 2021

Keywords

  • Double synchronous reference frame
  • frequency coupling
  • impedance modeling
  • phase locked loop (PLL)
  • small-signal modeling

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