Time Disciplined Non-PLL Active Synchronization for Grid Forming Inverters

Toby Meyers

Research output: NRELPresentation


Grid forming inverters (GFMIs) are a critical component of the future grid. One major challenge with GFMIs is synchronization. Currently, most research in GFMI synchronization is focused around specific transition types but this is only a subcategory of the possible events facing GFMIs. In this paper, we propose categorizing all possible synchronization events into four categories: (1) initial grid synchronization, (2) ride-through, (3) blackstart coordination, (4) grid reconnection coordination. By categorizing events, we can better compare and integrate different control strategies under specific test conditions as demonstrated in simulation. This paper's framework helps guide GFMI primary-level control design to further research towards the 100% inverter-dominant grid.
Original languageAmerican English
Number of pages15
StatePublished - 2021

Publication series

NamePresented at the Texas Power and Energy Conference 2021, 4-5 February 2021

Bibliographical note

See NREL/CP-5D00-77579 for related conference paper

NREL Publication Number

  • NREL/PR-5D00-78901


  • blackstart
  • grid forming inverter
  • IEEE 1547
  • islanding
  • microgrid
  • reconnection
  • ride-through
  • synchronization


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