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A Scalable Control Design for Grid-Forming Inverters in Microgrids

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cam.issuedOnline2021-08-18
cam.orpheus.success2021-11-12 - Embargo set during processing via Fast-track
dc.contributor.authorWatson, JD
dc.contributor.authorOjo, Y
dc.contributor.authorLaib, K
dc.contributor.authorLestas, I
dc.contributor.orcidWatson, JD [0000-0002-6326-8309]
dc.contributor.orcidOjo, Y [0000-0003-2303-2219]
dc.contributor.orcidLaib, K [0000-0002-1407-572X]
dc.contributor.orcidLestas, I [0000-0002-7739-949X]
dc.date.accessioned2021-11-12T13:45:41Z
dc.date.available2021-11-12T13:45:41Z
dc.date.issued2021
dc.description.abstractMicrogrids are increasingly recognized as a key technology for the integration of distributed energy resources into the power network, allowing local clusters of load and distributed energy resources to operate autonomously. However, microgrid operation brings new challenges, especially in islanded operation as frequency and voltage control are no longer provided by large rotating machines. Instead, the power converters in the microgrid must coordinate to regulate the frequency and voltage and ensure stability. We consider the problem of designing controllers to achieve these objectives. Using passivity theory to derive decentralized stability conditions for the microgrid, we propose a control design method for grid-forming inverters. For the analysis we use higher-order models for the inverters and also advanced dynamic models for the lines with an arbitrarily large number of states. By satisfying the decentralized condition formulated, plug-and-play operation can be achieved with guaranteed stability, and performance can also be improved by incorporating this condition as a constraint in corresponding optimization problems formulated. In addition, our control design can improve the power sharing properties of the microgrid compared to previous non-droop approaches. Finally, realistic simulations confirm that the controller design improves the stability and performance of the power network.
dc.description.sponsorshipERC starting grant 679774
dc.identifier.doi10.17863/CAM.78023
dc.identifier.eissn1949-3061
dc.identifier.issn1949-3053
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/330579
dc.language.isoeng
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)
dc.publisher.urlhttp://dx.doi.org/10.1109/tsg.2021.3105730
dc.rightsAll rights reserved
dc.rights.urihttp://www.rioxx.net/licenses/all-rights-reserved
dc.subjectInverters
dc.subjectPower system stability
dc.subjectMicrogrids
dc.subjectVoltage control
dc.subjectMathematical model
dc.subjectControl design
dc.subjectAnalytical models
dc.subjectMicrogrids
dc.subjectvoltage control
dc.subjectdecentralized control
dc.subjectgrid-forming inverters
dc.subjectplug-and-play capability
dc.subjectpassivity
dc.subjecth infinity control
dc.subjectcontrol synthesis
dc.titleA Scalable Control Design for Grid-Forming Inverters in Microgrids
dc.typeArticle
dcterms.dateAccepted2021-08-13
prism.endingPage4739
prism.issueIdentifier6
prism.publicationDate2021
prism.publicationNameIEEE Transactions on Smart Grid
prism.startingPage4726
prism.volume12
pubs.funder-project-idEuropean Research Council (679774)
rioxxterms.licenseref.startdate2021-11-01
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.typeJournal Article/Review
rioxxterms.versionAM
rioxxterms.versionofrecord10.1109/TSG.2021.3105730

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