Observer-based power-synchronization control for grid-forming converters

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Abstract

This paper proposes an observer-based power-synchronization control (OPSC) method for grid-forming converters. The method can also be utilized for the starting of synchronous generators. It is analogous to observer-based volts-per-hertz (V/Hz) control of electric machine drives, consisting of state-feedback control and an observer. A linearized model of the closed-loop system is derived, passivity of the mechanical subsystem is studied and tuning recommendations are given. The power tracking performance is assessed and compared to that of reference-feedforward power-synchronization control (RFPSC) with the help of simulations and laboratory experiments using a 12.5-kVA converter. The results show that the proposed control method provides good performance in both weak and strong grids.
Original languageEnglish
Title of host publication2023 IEEE Belgrade PowerTech
PublisherIEEE
Pages1-6
Number of pages6
ISBN (Print)978-1-6654-8779-5
DOIs
Publication statusPublished - 29 Jun 2023
MoE publication typeA4 Conference publication
EventIEEE PowerTech - Belgrade , Serbia
Duration: 25 Jun 202329 Jun 2023
Conference number: 15

Conference

ConferenceIEEE PowerTech
Country/TerritorySerbia
CityBelgrade
Period25/06/202329/06/2023

Keywords

  • Couplings
  • Uncertain systems
  • Analytical models
  • Electric machines
  • Observers
  • Synchronous generators
  • Closed loop systems

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