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Article: Analysis of Modal Resonance Between PLL and DC-Link Voltage Control in Weak-Grid Tied VSCs

TitleAnalysis of Modal Resonance Between PLL and DC-Link Voltage Control in Weak-Grid Tied VSCs
Authors
KeywordsDC-link voltage control
Modal resonance
PLL
stability analysis
VSC
Issue Date2019
PublisherInstitute of Electrical and Electronics Engineers. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=59
Citation
IEEE Transactions on Power Systems, 2019, v. 34 n. 2, p. 1127-1138 How to Cite?
AbstractWeak ac grid operation is known to challenge the stability of voltage source converters (VSCs). This paper provides an interpretation for the cause of such instability in view of a particular modal resonance within VSC's control, i.e., the resonance between dc-link voltage control (DVC) and synchronizing control-phase-locked loop (PLL). To characterize this modal interaction, a two degrees-of-freedom mass-spring-damper model is first proposed. Subsequently, based on a multi-modal decomposition approach, the amount of interaction is quantified by the incremental damping and frequency drift superimposed on each individual mode. Analytical results indicate that when the natural frequencies of PLL and DVC mode are close, strong interaction will push the lower-frequency mode to move toward the decreased frequency and damping direction, while causing the higher-frequency mode to go the opposite. Moreover, weaker ac grid operation will amplify such frequency/damping excursion and, thus, will render the lower-frequency mode unstable. Further, when the ac voltage control (AVC) is disregarded, a dynamic stability margin is analytically derived, and operation beyond the margin will result in monotonic drift. With the inclusion of AVC, owing to its introduced additional negative damping, by contrast, instability will occur in the presence of oscillations. Both eigenvalue analysis and simulations are conducted to verify the results. © 1969-2012 IEEE.
Persistent Identifierhttp://hdl.handle.net/10722/274997
ISSN
2017 Impact Factor: 5.255
2015 SCImago Journal Rankings: 4.126
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWang, D-
dc.contributor.authorLiang, L-
dc.contributor.authorShi, L-
dc.contributor.authorHu, J-
dc.contributor.authorHou, Y-
dc.date.accessioned2019-09-10T02:33:18Z-
dc.date.available2019-09-10T02:33:18Z-
dc.date.issued2019-
dc.identifier.citationIEEE Transactions on Power Systems, 2019, v. 34 n. 2, p. 1127-1138-
dc.identifier.issn0885-8950-
dc.identifier.urihttp://hdl.handle.net/10722/274997-
dc.description.abstractWeak ac grid operation is known to challenge the stability of voltage source converters (VSCs). This paper provides an interpretation for the cause of such instability in view of a particular modal resonance within VSC's control, i.e., the resonance between dc-link voltage control (DVC) and synchronizing control-phase-locked loop (PLL). To characterize this modal interaction, a two degrees-of-freedom mass-spring-damper model is first proposed. Subsequently, based on a multi-modal decomposition approach, the amount of interaction is quantified by the incremental damping and frequency drift superimposed on each individual mode. Analytical results indicate that when the natural frequencies of PLL and DVC mode are close, strong interaction will push the lower-frequency mode to move toward the decreased frequency and damping direction, while causing the higher-frequency mode to go the opposite. Moreover, weaker ac grid operation will amplify such frequency/damping excursion and, thus, will render the lower-frequency mode unstable. Further, when the ac voltage control (AVC) is disregarded, a dynamic stability margin is analytically derived, and operation beyond the margin will result in monotonic drift. With the inclusion of AVC, owing to its introduced additional negative damping, by contrast, instability will occur in the presence of oscillations. Both eigenvalue analysis and simulations are conducted to verify the results. © 1969-2012 IEEE.-
dc.languageeng-
dc.publisherInstitute of Electrical and Electronics Engineers. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=59-
dc.relation.ispartofIEEE Transactions on Power Systems-
dc.rightsIEEE Transactions on Power Systems. Copyright © Institute of Electrical and Electronics Engineers.-
dc.rights©20xx IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.-
dc.subjectDC-link voltage control-
dc.subjectModal resonance-
dc.subjectPLL-
dc.subjectstability analysis-
dc.subjectVSC-
dc.titleAnalysis of Modal Resonance Between PLL and DC-Link Voltage Control in Weak-Grid Tied VSCs-
dc.typeArticle-
dc.identifier.emailHou, Y: yhhou@hku.hk-
dc.identifier.authorityHou, Y=rp00069-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1109/TPWRS.2018.2871616-
dc.identifier.scopuseid_2-s2.0-85053627773-
dc.identifier.hkuros302650-
dc.identifier.volume34-
dc.identifier.issue2-
dc.identifier.spage1127-
dc.identifier.epage1138-
dc.identifier.isiWOS:000459509400027-
dc.publisher.placeUnited States-

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