articleIEEE Transactions on Industrial ElectronicsApr 14, 2010GREEN OA

Multiresonant Frequency-Locked Loop for Grid Synchronization of Power Converters Under Distorted Grid Conditions

PRPedro RodríguezÁLÁlvaro LunaJIJose Ignacio CandelaRMR. MujalRTRemus Teodorescu

Universitat Politècnica de Catalunya · "Dunarea de Jos" University of Galati · +1 more institution

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Abstract

This paper presents a new multiresonant frequency-adaptive synchronization method for grid-connected power converters that allows estimating not only the positive- and negative-sequence components of the power signal at the fundamental frequency but also other sequence components at other harmonic frequencies. The proposed system is called MSOGI-FLL since it is based on both a harmonic decoupling network consisting of multiple second-order generalized integrators (MSOGIs) and a frequency-locked loop (FLL), which makes the system frequency adaptive. In this paper, the MSOGI-FLL is analyzed for single- and three-phase applications, deducing some key expressions regarding its stability and tuning. Moreover, the…

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Topics & keywords

Topics
Keywords
  • Converters
  • Decoupling (probability)
  • Control theory (sociology)
  • Integrator
  • Frequency grid
  • Grid
  • Synchronization (alternating current)
  • Harmonic
UN Sustainable Development Goals
  • Affordable and clean energy
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