Short-term Voltage Stability of Distribution Grids with Medium-scale PV Plants due to Asymmetrical Faults

Islam, M; Mithulananthan, N; Hossain, J; Bhumkittipich, K

Short-term Voltage Stability of Distribution Grids with Medium-scale PV Plants due to Asymmetrical Faults

Islam, M Mithulananthan, N Hossain, J

Bhumkittipich, K

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Publisher:: IEEE
Publication Type:: Conference Proceeding
Citation:: 2019 IEEE PES GTD Grand International Conference and Exposition Asia, GTD Asia 2019, 2019, pp. 130-135
Issue Date:: 2019-05-15

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Field	Value	Language
dc.contributor.author	Islam, M
dc.contributor.author	Mithulananthan, N
dc.contributor.author	Hossain, J https://orcid.org/0000-0001-7602-3581
dc.contributor.author	Bhumkittipich, K
dc.date	2019-03-19
dc.date.accessioned	2020-06-20T04:37:12Z
dc.date.available	2021-05-18T19:01:32Z
dc.date.issued	2019-05-15
dc.identifier.citation	2019 IEEE PES GTD Grand International Conference and Exposition Asia, GTD Asia 2019, 2019, pp. 130-135
dc.identifier.isbn	9781538674345
dc.identifier.uri	http://hdl.handle.net/10453/141584
dc.description.abstract	© 2019 IEEE. With the increasing penetration of photo-voltaic (PV) units into electrical grids, particularly in distribution networks (DNs), the concern of short-term voltage instability (STVI) are growing in the presence of induction motor (IM) loads. On the event of unsymmetrical faults, STVI issues could be more complicated as the next-generation PV systems would require negative sequence power injection into the grid in conjunction with positive one. Therefore, this paper comprehensively investigates the impact of negative sequence power on the short-term voltage stability (STVS) of DNs. The method of characterizing an unbalanced fault and supplementary controls for PV systems are developed. Different case studies are conducted on a balanced IEEE 4 bus and an unbalanced IEEE 13 bus system by injecting different level of negative sequence power considering with and without peak current limitation of the PV converters. It is observed that STVS is likely to be weakened in case of large negative sequence power penetration, while injecting high positive sequence power can cause excessive voltage swell resulting inverter disconnections. Therefore, both positive and negative sequence powers need to be injected optimally to ensure the system's security following a fault.
dc.language	en
dc.publisher	IEEE
dc.relation.ispartof	2019 IEEE PES GTD Grand International Conference and Exposition Asia, GTD Asia 2019
dc.relation.ispartof	IEEE PES GTD Grand International Conference and Exposition Asia
dc.relation.isbasedon	10.1109/GTDAsia.2019.8715947
dc.rights	© 2019 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.	en_US
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.title	Short-term Voltage Stability of Distribution Grids with Medium-scale PV Plants due to Asymmetrical Faults
dc.type	Conference Proceeding
utslib.location.activity	Bangkok, Thailand
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
utslib.copyright.status	open_access	*
pubs.consider-herdc	false
dc.date.updated	2020-06-20T04:37:08Z
pubs.finish-date	2019-03-23
pubs.place-of-publication	Piscataway, USA
pubs.publication-status	Published
pubs.start-date	2019-03-19
dc.location	Piscataway, USA

Abstract:

© 2019 IEEE. With the increasing penetration of photo-voltaic (PV) units into electrical grids, particularly in distribution networks (DNs), the concern of short-term voltage instability (STVI) are growing in the presence of induction motor (IM) loads. On the event of unsymmetrical faults, STVI issues could be more complicated as the next-generation PV systems would require negative sequence power injection into the grid in conjunction with positive one. Therefore, this paper comprehensively investigates the impact of negative sequence power on the short-term voltage stability (STVS) of DNs. The method of characterizing an unbalanced fault and supplementary controls for PV systems are developed. Different case studies are conducted on a balanced IEEE 4 bus and an unbalanced IEEE 13 bus system by injecting different level of negative sequence power considering with and without peak current limitation of the PV converters. It is observed that STVS is likely to be weakened in case of large negative sequence power penetration, while injecting high positive sequence power can cause excessive voltage swell resulting inverter disconnections. Therefore, both positive and negative sequence powers need to be injected optimally to ensure the system's security following a fault.

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http://hdl.handle.net/10453/141584