Comparison of Virtual Oscillator and Droop Control: Preprint

Brian Johnson, Sairaj Dhople, Mohit Sinha, Miguel Rodriguez

Research output: Contribution to conferencePaper


Virtual oscillator control and droop control are two techniques that can be used to ensure synchronization and power sharing of parallel inverters in islanded operation. VOC relies on the implementation of non-linear Van der Pol oscillator equations in the control system of the inverter, acting upon the time-domain instantaneous inverter current and terminal voltage. On the other hand, DC explicitly computes active and reactive power produced by the inverter and relies on limited bandwidth low-pass filters. Even though both methods can be engineered to produce the same steady-state characteristics, their dynamic performances are significantly different. This paper presents analytical and experimental results that aim to compare both methods. It is shown that VOC is inherently faster and enables minimizing the circulating currents. The results are verified using three 120V, 1kW inverters.
Original languageAmerican English
Number of pages8
StatePublished - 2017
Event2017 IEEE 18th Workshop on Control and Modeling for Power Electronics (COMPEL) - Stanford, California
Duration: 9 Jul 201712 Jul 2017


Conference2017 IEEE 18th Workshop on Control and Modeling for Power Electronics (COMPEL)
CityStanford, California

Bibliographical note

See NREL/CP-5D00-70288 for paper as published in IEEE proceedings

NREL Publication Number

  • NREL/CP-5D00-68204


  • droop control
  • island
  • microgrid
  • virtual oscillator


Dive into the research topics of 'Comparison of Virtual Oscillator and Droop Control: Preprint'. Together they form a unique fingerprint.

Cite this