A PLL-Based Controller for Three-Phase Grid-Connected Power Converters

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22 Citations (Scopus)


The current control of three-phase grid-connected converters is typically carried out by using a proportional-resonant controller or synchronous reference frame (SRF) proportional-integral regulator. The implementation of these controllers often requires knowledge of the grid voltage frequency/phase angle, which is typically provided by a synchronization unit. It implies that dynamics and possible inaccuracies of the synchronization unit have a considerable impact on the current controller performance. The aim of this letter is to design an adaptive current controller by using a conventional SRF phase-locked loop. In this way, the current controller and synchronization part are merged into a single unit, which results in a simpler and more compact structure. The effectiveness of the proposed controller is verified using experimental results.

Original languageEnglish
Article number7959117
JournalIEEE Transactions on Power Electronics
Issue number2
Pages (from-to)911-916
Number of pages6
Publication statusPublished - Feb 2018


  • Current control
  • Distributed generation (DG) systems
  • Phase-locked loop (PLL)
  • Power converters
  • Synchronization
  • distributed generation systems
  • power converters
  • synchronization
  • phase-locked loop (PLL)

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