Nonlinear supersets to droop control

Mohit Sinha, Sairaj Dhople, Brian Johnson, Nathan Ainsworth, Florian Dörfler

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

14 Scopus citations

Abstract

This paper offers a suite of extensions to Virtual Oscillator Control - a time-domain control method for islanded inverters whereby they are controlled to emulate the dynamics of weakly nonlinear limit-cycle oscillators. First, we develop a coordinate transformation to derive the PWM switching signals from the oscillator dynamic states in a manner that allows the inverter terminal-voltage amplitude and frequency to be traded off against a parametric linear combination of average active and reactive power. Additionally, we compare the time-domain performance of VOC to droop control for parallel connected inverters in two cases: synchronization from a cold start and inverter addition. Finally, with a view towards developing outputfilter-design strategies as well as outlining strategies for grid-connected operations, we derive a sufficient condition for a Virtual-Oscillator-controlled inverter to be entrained to a stiff voltage source.

Original languageEnglish (US)
Title of host publication2015 IEEE 16th Workshop on Control and Modeling for Power Electronics, COMPEL 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781467368476
DOIs
StatePublished - Sep 1 2015
Event16th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2015 - Vancouver, Canada
Duration: Jul 12 2015Jul 15 2015

Publication series

Name2015 IEEE 16th Workshop on Control and Modeling for Power Electronics, COMPEL 2015

Other

Other16th IEEE Workshop on Control and Modeling for Power Electronics, COMPEL 2015
CountryCanada
CityVancouver
Period7/12/157/15/15

Bibliographical note

Funding Information:
M. Sinha and S. V. Dhople were supported in part by the Institute of Renewable Energy and the Environment, UMN, under grant RL-0010-13; the Office of Naval Research under grant N000141410639; and the National Science Foundation under the CAREER award ECCS-1453921. B. B. Johnson and N. G. Ainsworth were supported by the Laboratory Directed Research and Development Program at NREL and by the U.S. Department of Energy under Contract No. DE-AC36-08- GO28308 with NREL. F. D?rfler was supported in part by the Swiss National Science Foundation AP Energy Grant 160573 and by ETH Z?rich Startup Funds.

Publisher Copyright:
© 2015 IEEE.

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