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

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
CountryUnited States
CityBaltimore
Period9/29/1910/3/19

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Lu, M., Dutta, S., Purba, V., Dhople, S., & Johnson, B. (2019). A grid-compatible virtual oscillator controller: Analysis and design. In 2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019 (pp. 2643-2649). [8913128] (2019 IEEE Energy Conversion Congress and Exposition, ECCE 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE.2019.8913128