A grid-compatible virtual oscillator controller: Analysis and design

Minghui Lu, Soham Dutta, Victor Purba, Sairaj Dhople, Brian Johnson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

In this paper, we present a virtual oscillator control (VOC) strategy for power inverters to operate in either grid-connected or islanded settings. The proposed controller is based on the dynamics of the nonlinear Andronov-Hopf oscillator and it provides voltage regulation, frequency support in islanded mode. It also features the potential to respond to real- and reactive-power setpoints for dispatchability in grid-connected mode. In contrast to early VOC incarnations which exhibit undesirable harmonics, the proposed controller offers a sinusoidal ac limit cycle as well as improved dynamic performance. Moreover, the proposed controller intrinsically generates orthogonal signals which facilitate implementation in three-phase systems. We study the controller dynamical model and outline a systematic design procedure such that the inverter satisfies standard ac performance specifications. Numerical simulations validate the analytical developments.

Original languageEnglish (US)
Title of host publication2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages2643-2649
Number of pages7
ISBN (Electronic)9781728103952
DOIs
StatePublished - Sep 2019
Event11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019 - Baltimore, United States
Duration: Sep 29 2019Oct 3 2019

Publication series

Name2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019

Conference

Conference11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019
Country/TerritoryUnited States
CityBaltimore
Period9/29/1910/3/19

Bibliographical note

Funding Information:
M. Lu, S. Dutta and B. Johnson were supported by the US Department of Energy Solar Energy Technology office under grants DE-EE0000-1583 and DE-EE0008346. Support was also provided by the Washington Research Foundation and the Clean Energy Institute at the University of Washington. V. Purba and S. V. Dhople were supported in part by the National Science Foundation through grant 1509277.

Publisher Copyright:
© 2019 IEEE.

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