Analysis of fault response of inverter-interfaced distributed generators in sequence networks

Mahamedi, B; Zhu, JG; Eskandari, M; Li, L; Mehrizi-Sani, A

Analysis of fault response of inverter-interfaced distributed generators in sequence networks

Mahamedi, B Zhu, JG

Eskandari, M

Li, L

Mehrizi-Sani, A

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Publication Type:: Conference Proceeding
Citation:: 2018 IEEE Industry Applications Society Annual Meeting, IAS 2018, 2018
Issue Date:: 2018-11-26

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Field	Value	Language
dc.contributor.author	Mahamedi, B	en_US
dc.contributor.author	Zhu, JG https://orcid.org/0000-0002-9763-4047	en_US
dc.contributor.author	Eskandari, M https://orcid.org/0000-0003-1185-9585	en_US
dc.contributor.author	Li, L https://orcid.org/0000-0001-8485-2216	en_US
dc.contributor.author	Mehrizi-Sani, A	en_US
dc.date.issued	2018-11-26	en_US
dc.identifier.citation	2018 IEEE Industry Applications Society Annual Meeting, IAS 2018, 2018	en_US
dc.identifier.isbn	9781538645369	en_US
dc.identifier.uri	http://hdl.handle.net/10453/133087
dc.description.abstract	© 2018 IEEE Microgrids mainly rely on distributed energy resources (DER) unable to generate electricity at the expected voltage and frequency. This necessitates the usage of inverters acting as a conditioning interface between the DER and microgrid, hence the name inverter-interfaced distributed generators (IIDG). On the other hand, the fast response of the primary control of inverters causes unconventional behavior of IIDGs under fault conditions, which can severely affect all parts of relaying, that is, fault sensing and polarization and faulted phase selection. This issue becomes more pronounced when an inverter-based microgrid operates in autonomous mode. This paper analyzes the root causes of such unconventional responses that challenge the traditional protection schemes. At first, the inverter control strategies including current limiting are briefly discussed. Then, the paper is continued by analyzing the response of an IIDG feeding its local load to balanced and unbalanced faults, where MATLAB/SIMULINK is used for simulation studies. It is shown how the constraints set by the control strategy itself and current limiter affect the response of IIDGs to fault conditions and consequently, their equivalent models under fault conditions. The findings presented in the paper clearly show that protective functions face difficulties in coping with fault conditions in IIDG-based microgrids due to their different equivalent models during fault period. These studies in turn help modify existing protection schemes or devise new ones applicable to this concept.	en_US
dc.relation.ispartof	2018 IEEE Industry Applications Society Annual Meeting, IAS 2018	en_US
dc.relation.isbasedon	10.1109/IAS.2018.8544547	en_US
dc.rights	info:eu-repo/semantics/closedAccess
dc.title	Analysis of fault response of inverter-interfaced distributed generators in sequence networks	en_US
dc.type	Conference Proceeding
utslib.for	090607 Power and Energy Systems Engineering (excl. Renewable Power)	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CCET - Centre for Clean Energy Technology
pubs.organisational-group	/University of Technology Sydney/Students
utslib.copyright.status	closed_access	*
pubs.publication-status	Published	en_US

Abstract:

© 2018 IEEE Microgrids mainly rely on distributed energy resources (DER) unable to generate electricity at the expected voltage and frequency. This necessitates the usage of inverters acting as a conditioning interface between the DER and microgrid, hence the name inverter-interfaced distributed generators (IIDG). On the other hand, the fast response of the primary control of inverters causes unconventional behavior of IIDGs under fault conditions, which can severely affect all parts of relaying, that is, fault sensing and polarization and faulted phase selection. This issue becomes more pronounced when an inverter-based microgrid operates in autonomous mode. This paper analyzes the root causes of such unconventional responses that challenge the traditional protection schemes. At first, the inverter control strategies including current limiting are briefly discussed. Then, the paper is continued by analyzing the response of an IIDG feeding its local load to balanced and unbalanced faults, where MATLAB/SIMULINK is used for simulation studies. It is shown how the constraints set by the control strategy itself and current limiter affect the response of IIDGs to fault conditions and consequently, their equivalent models under fault conditions. The findings presented in the paper clearly show that protective functions face difficulties in coping with fault conditions in IIDG-based microgrids due to their different equivalent models during fault period. These studies in turn help modify existing protection schemes or devise new ones applicable to this concept.

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http://hdl.handle.net/10453/133087