Enhancement of voltage quality in a passive network supplied by a VSC-HVDC transmission under disturbances

Tang, X; Lu, DDC

Enhancement of voltage quality in a passive network supplied by a VSC-HVDC transmission under disturbances

Tang, X Lu, DDC

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Publication Type:: Journal Article
Citation:: International Journal of Electrical Power and Energy Systems, 2014, 54 pp. 45 - 54
Issue Date:: 2014-01-01

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Field	Value	Language
dc.contributor.author	Tang, X	en_US
dc.contributor.author	Lu, DDC https://orcid.org/0000-0003-2145-0580	en_US
dc.date.issued	2014-01-01	en_US
dc.identifier.citation	International Journal of Electrical Power and Energy Systems, 2014, 54 pp. 45 - 54	en_US
dc.identifier.issn	0142-0615	en_US
dc.identifier.uri	http://hdl.handle.net/10453/118662
dc.description.abstract	When a VSC-HVDC transmission is connected to a passive network, the receiving AC system is weak and is subject to power quality problems such as voltage sag and swell. Dynamic performance of voltage control would affect the voltage quality in the receiving AC system directly. The direct voltage control (DVC) method is simple but fails to quickly eliminate voltage fluctuation caused by load current change. One solution is to add a feed-forward controller to the DVC. The inverter nonlinearities, however, degrade the performance of the feed-forward controller. This paper presents a modified direct voltage control to enhance control dynamics in the receiving AC system by overcoming the effect of inverter nonlinearities. In the proposed control scheme, the influence of inverter nonlinearities on the performance of the feed-forward controller is first discussed. A compensation method for nonlinearities of the inverter is then designed in the d-q rotating axis. Moreover, to overcome parameter sensitivity of the feed-forward controller, a feed-back loop with a PI controller is implemented. Simulation results from PSCAD/EMTDC showed that the VSC-HVDC system using the proposed control scheme, as compared to that with the conventional control methods, has a better capability to mitigate voltage fluctuation during system disturbances. © 2013 Elsevier Ltd. All rights reserved.	en_US
dc.relation.ispartof	International Journal of Electrical Power and Energy Systems	en_US
dc.relation.isbasedon	10.1016/j.ijepes.2013.06.030	en_US
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Energy	en_US
dc.title	Enhancement of voltage quality in a passive network supplied by a VSC-HVDC transmission under disturbances	en_US
dc.type	Journal Article
utslib.citation.volume	54	en_US
utslib.for	0906 Electrical and Electronic Engineering	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
utslib.copyright.status	closed_access	*
pubs.publication-status	Published	en_US
pubs.volume	54	en_US

Abstract:

When a VSC-HVDC transmission is connected to a passive network, the receiving AC system is weak and is subject to power quality problems such as voltage sag and swell. Dynamic performance of voltage control would affect the voltage quality in the receiving AC system directly. The direct voltage control (DVC) method is simple but fails to quickly eliminate voltage fluctuation caused by load current change. One solution is to add a feed-forward controller to the DVC. The inverter nonlinearities, however, degrade the performance of the feed-forward controller. This paper presents a modified direct voltage control to enhance control dynamics in the receiving AC system by overcoming the effect of inverter nonlinearities. In the proposed control scheme, the influence of inverter nonlinearities on the performance of the feed-forward controller is first discussed. A compensation method for nonlinearities of the inverter is then designed in the d-q rotating axis. Moreover, to overcome parameter sensitivity of the feed-forward controller, a feed-back loop with a PI controller is implemented. Simulation results from PSCAD/EMTDC showed that the VSC-HVDC system using the proposed control scheme, as compared to that with the conventional control methods, has a better capability to mitigate voltage fluctuation during system disturbances. © 2013 Elsevier Ltd. All rights reserved.

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http://hdl.handle.net/10453/118662