Modified Virtual Oscillator Based Operation of Grid Forming Converters with Single Voltage Sensor

Research output: Contribution to conferencePaper

2 Scopus Citations


Virtual oscillator based control architecture for grid forming converter with inner current control loop for additional objective accomplishments is proposed in this paper. In general, virtual oscillator is based on Lienard type of oscillator equation with a cubic nonlinearity. Virtual oscillator alone cannot accommodate unbalanced or harmonic mitigation while operating converters in grid forming mode. Therefore, to accomplish better tracking performance, incorporating the provision for nonlinear and/or unbalanced loads, an inner current control loop is utilized which is based upon Lyapunov energy function type control architecture due to its advantages. To reduce the overall cost of implementation and ensure proper phase difference in the generated voltages, the implemented virtual oscillator operates with only one voltage feedback from the point of common coupling as presented in this paper. To verify the effectiveness of the proposed approach, the overall system has been modeled in MATTLAB/Simulink and PLECS domain and case studies showing the successful production of low harmonic load voltages under nonideal loading condition along with other important results are presented in this paper.
Original languageAmerican English
Number of pages5
StatePublished - 2023
EventEnergy Conversion Congress and Expo (IEEE-ECCE) - Nashville, Tennessee, USA.
Duration: 29 Oct 20232 Nov 2023


ConferenceEnergy Conversion Congress and Expo (IEEE-ECCE)
CityNashville, Tennessee, USA.

Bibliographical note

See NREL/CP-5D00-85362 for preprint

NREL Publication Number

  • NREL/CP-5D00-88810


  • dual second order generalized integrator
  • nonlinear/unbalanced loads
  • photovoltaic system
  • point of common coupling
  • single voltage sensor
  • three-phase grid forming inverter


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