Virtual oscillator control (VOC) is a time-domain strategy for regulating the operation of grid-forming (GFM) inverters. The premise of this method is to leverage the dynamics of nonlinear oscillator circuits to realize controllers; the time-domain nature of the resulting implementation is starkly different from classical droop control methods. This paper considers VOC realized with the dynamics of the Andronov-Hopf oscillator, a second-order nonlinear dynamical system that enables GFM inverters to be dispatched and generate low-harmonic outputs while not compromising dynamic performance. Leveraging an equilibrium analysis of the involved dynamics and small-signal models, we put forth a side-by-side comparison of dynamic performance and small-signal stability with classical droop control. The results demonstrate superior dynamic performance of VOC, and broadly, the paper furthers efforts focused on modeling and analysis of this general class of GFM controllers.
|Original language||English (US)|
|Title of host publication||Proceedings - IECON 2020|
|Subtitle of host publication||46th Annual Conference of the IEEE Industrial Electronics Society|
|Publisher||IEEE Computer Society|
|Number of pages||6|
|State||Published - Oct 18 2020|
|Event||46th Annual Conference of the IEEE Industrial Electronics Society, IECON 2020 - Virtual, Singapore, Singapore|
Duration: Oct 19 2020 → Oct 21 2020
|Name||IECON Proceedings (Industrial Electronics Conference)|
|Conference||46th Annual Conference of the IEEE Industrial Electronics Society, IECON 2020|
|Period||10/19/20 → 10/21/20|
Bibliographical noteFunding Information:
This material is based upon work supported by the U.S. Department of Energy’s Office of Energy Efficiency and Renewable Energy (EERE) under Solar Energy Technologies Office (SETO) Agreement Number EE0009025, the National Science Foundation through grant 1509277, and Washington Research Foundation.
© 2020 IEEE.