On the Passivity of Grid-Forming Converters-Role of Virtual Impedance

Mohammadreza Miranbeigi, Pranjal M. Gajare, Joseph Benzaquen, Prasad Kandula, Deepak Divan

Research output: Contribution to conferencePaperpeer-review

8 Scopus citations

Abstract

Grid-forming inverters are the key enablers for the integration of inverter-based resources at scale. A critical component of grid-forming control architecture is the emulation of virtual impedance. However, virtual impedance implementation along with the inner current loops can affect the converter stability. To ensure harmonic stability under widely varying operating conditions, this paper analyzes the passivity of grid-forming inverter with virtual impedance and converter-side current loop. Effective converter admittance is derived from the control architecture and is then used to analyze the passivity properties of grid-forming inverters. Furthermore, a model-based delay-compensation method is proposed to increase the frequency range of passive behavior. The analysis is verified through Matlab/Simulink and Hardware-in-the-Loop real-time simulations.

Original languageEnglish
Pages650-656
Number of pages7
DOIs
StatePublished - 2022
Externally publishedYes
Event37th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2022 - Houston, United States
Duration: Mar 20 2022Mar 24 2022

Conference

Conference37th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2022
Country/TerritoryUnited States
CityHouston
Period03/20/2203/24/22

Funding

This work is supported by ARPA-E under DE-AR0000899 and the Center for Distributed Energy (CDE), Georgia Institute of Technology. The authors are grateful for the support provided by ARPA-E and Center for Distributed Energy (CDE) at Georgia Tech for this work.

Keywords

  • Grid-forming
  • active damping
  • delay compensation
  • passivity
  • virtual impedance

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