A Selective Fault Clearing Scheme for a Hybrid VSC-LCC Multi-Terminal HVdc System

A selective fault clearing scheme is proposed for a hybrid voltage source converter (VSC)-line commutated converter (LCC) multi-terminal high voltage direct current (HVdc) transmission structure in which two small capacity VSC stations tap into the main transmission line of a high capacity LCC-HVdc...
Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Naushath M. Haleem [verfasserIn] Athula D. Rajapakse [verfasserIn] Aniruddha M. Gole [verfasserIn] Ioni T. Fernando [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2020

Schlagwörter:	LCC-VSC hybrid HVdc transmission systems hybrid multi-terminal HVdc grids HVdc dc side fault recovery dc fault detection and discrimination in HVdc grids

Übergeordnetes Werk:	In: Energies - MDPI AG, 2008, 13(2020), 14, p 3554
Übergeordnetes Werk:	volume:13 ; year:2020 ; number:14, p 3554

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.3390/en13143554

Katalog-ID:	DOAJ029949688

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520			\|a A selective fault clearing scheme is proposed for a hybrid voltage source converter (VSC)-line commutated converter (LCC) multi-terminal high voltage direct current (HVdc) transmission structure in which two small capacity VSC stations tap into the main transmission line of a high capacity LCC-HVdc link. The use of dc circuit breakers (dc CBs) on the branches connecting to VSCs at the tapping points is explored to minimize the impact of tapping on the reliability of the main LCC link. This arrangement allows clearing of temporary faults on the main LCC line as usual by force retardation of the LCC rectifier. The faults on the branches connecting to VSC stations can be cleared by blocking insulated gate bipolar transistors (IGBTs) and opening ac circuit breakers (ac CB), without affecting the main line’s performance. A local voltage and current measurement based fault discrimination scheme is developed to identify the faulted sections and pole(s), and trigger appropriate fault recovery functions. This fault discrimination scheme is capable of detecting and discriminating short circuits and high resistances faults in any branch well before 2 ms. For the test grid considered, 6 kA, 2 ms dc CBs can easily facilitate the intended fault clearing functions and maintain the power transfer through healthy pole during single-pole faults.
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allfields	10.3390/en13143554 doi (DE-627)DOAJ029949688 (DE-599)DOAJf622fb06c54047b4ae72188711a85a28 DE-627 ger DE-627 rakwb eng Naushath M. Haleem verfasserin aut A Selective Fault Clearing Scheme for a Hybrid VSC-LCC Multi-Terminal HVdc System 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier A selective fault clearing scheme is proposed for a hybrid voltage source converter (VSC)-line commutated converter (LCC) multi-terminal high voltage direct current (HVdc) transmission structure in which two small capacity VSC stations tap into the main transmission line of a high capacity LCC-HVdc link. The use of dc circuit breakers (dc CBs) on the branches connecting to VSCs at the tapping points is explored to minimize the impact of tapping on the reliability of the main LCC link. This arrangement allows clearing of temporary faults on the main LCC line as usual by force retardation of the LCC rectifier. The faults on the branches connecting to VSC stations can be cleared by blocking insulated gate bipolar transistors (IGBTs) and opening ac circuit breakers (ac CB), without affecting the main line’s performance. A local voltage and current measurement based fault discrimination scheme is developed to identify the faulted sections and pole(s), and trigger appropriate fault recovery functions. This fault discrimination scheme is capable of detecting and discriminating short circuits and high resistances faults in any branch well before 2 ms. For the test grid considered, 6 kA, 2 ms dc CBs can easily facilitate the intended fault clearing functions and maintain the power transfer through healthy pole during single-pole faults. LCC-VSC hybrid HVdc transmission systems hybrid multi-terminal HVdc grids HVdc dc side fault recovery dc fault detection and discrimination in HVdc grids Technology T Athula D. Rajapakse verfasserin aut Aniruddha M. Gole verfasserin aut Ioni T. Fernando verfasserin aut In Energies MDPI AG, 2008 13(2020), 14, p 3554 (DE-627)572083742 (DE-600)2437446-5 19961073 nnns volume:13 year:2020 number:14, p 3554 https://doi.org/10.3390/en13143554 kostenfrei https://doaj.org/article/f622fb06c54047b4ae72188711a85a28 kostenfrei https://www.mdpi.com/1996-1073/13/14/3554 kostenfrei https://doaj.org/toc/1996-1073 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 13 2020 14, p 3554
spelling	10.3390/en13143554 doi (DE-627)DOAJ029949688 (DE-599)DOAJf622fb06c54047b4ae72188711a85a28 DE-627 ger DE-627 rakwb eng Naushath M. Haleem verfasserin aut A Selective Fault Clearing Scheme for a Hybrid VSC-LCC Multi-Terminal HVdc System 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier A selective fault clearing scheme is proposed for a hybrid voltage source converter (VSC)-line commutated converter (LCC) multi-terminal high voltage direct current (HVdc) transmission structure in which two small capacity VSC stations tap into the main transmission line of a high capacity LCC-HVdc link. The use of dc circuit breakers (dc CBs) on the branches connecting to VSCs at the tapping points is explored to minimize the impact of tapping on the reliability of the main LCC link. This arrangement allows clearing of temporary faults on the main LCC line as usual by force retardation of the LCC rectifier. The faults on the branches connecting to VSC stations can be cleared by blocking insulated gate bipolar transistors (IGBTs) and opening ac circuit breakers (ac CB), without affecting the main line’s performance. A local voltage and current measurement based fault discrimination scheme is developed to identify the faulted sections and pole(s), and trigger appropriate fault recovery functions. This fault discrimination scheme is capable of detecting and discriminating short circuits and high resistances faults in any branch well before 2 ms. For the test grid considered, 6 kA, 2 ms dc CBs can easily facilitate the intended fault clearing functions and maintain the power transfer through healthy pole during single-pole faults. LCC-VSC hybrid HVdc transmission systems hybrid multi-terminal HVdc grids HVdc dc side fault recovery dc fault detection and discrimination in HVdc grids Technology T Athula D. Rajapakse verfasserin aut Aniruddha M. Gole verfasserin aut Ioni T. Fernando verfasserin aut In Energies MDPI AG, 2008 13(2020), 14, p 3554 (DE-627)572083742 (DE-600)2437446-5 19961073 nnns volume:13 year:2020 number:14, p 3554 https://doi.org/10.3390/en13143554 kostenfrei https://doaj.org/article/f622fb06c54047b4ae72188711a85a28 kostenfrei https://www.mdpi.com/1996-1073/13/14/3554 kostenfrei https://doaj.org/toc/1996-1073 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 13 2020 14, p 3554
allfields_unstemmed	10.3390/en13143554 doi (DE-627)DOAJ029949688 (DE-599)DOAJf622fb06c54047b4ae72188711a85a28 DE-627 ger DE-627 rakwb eng Naushath M. Haleem verfasserin aut A Selective Fault Clearing Scheme for a Hybrid VSC-LCC Multi-Terminal HVdc System 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier A selective fault clearing scheme is proposed for a hybrid voltage source converter (VSC)-line commutated converter (LCC) multi-terminal high voltage direct current (HVdc) transmission structure in which two small capacity VSC stations tap into the main transmission line of a high capacity LCC-HVdc link. The use of dc circuit breakers (dc CBs) on the branches connecting to VSCs at the tapping points is explored to minimize the impact of tapping on the reliability of the main LCC link. This arrangement allows clearing of temporary faults on the main LCC line as usual by force retardation of the LCC rectifier. The faults on the branches connecting to VSC stations can be cleared by blocking insulated gate bipolar transistors (IGBTs) and opening ac circuit breakers (ac CB), without affecting the main line’s performance. A local voltage and current measurement based fault discrimination scheme is developed to identify the faulted sections and pole(s), and trigger appropriate fault recovery functions. This fault discrimination scheme is capable of detecting and discriminating short circuits and high resistances faults in any branch well before 2 ms. For the test grid considered, 6 kA, 2 ms dc CBs can easily facilitate the intended fault clearing functions and maintain the power transfer through healthy pole during single-pole faults. LCC-VSC hybrid HVdc transmission systems hybrid multi-terminal HVdc grids HVdc dc side fault recovery dc fault detection and discrimination in HVdc grids Technology T Athula D. Rajapakse verfasserin aut Aniruddha M. Gole verfasserin aut Ioni T. Fernando verfasserin aut In Energies MDPI AG, 2008 13(2020), 14, p 3554 (DE-627)572083742 (DE-600)2437446-5 19961073 nnns volume:13 year:2020 number:14, p 3554 https://doi.org/10.3390/en13143554 kostenfrei https://doaj.org/article/f622fb06c54047b4ae72188711a85a28 kostenfrei https://www.mdpi.com/1996-1073/13/14/3554 kostenfrei https://doaj.org/toc/1996-1073 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 13 2020 14, p 3554
allfieldsGer	10.3390/en13143554 doi (DE-627)DOAJ029949688 (DE-599)DOAJf622fb06c54047b4ae72188711a85a28 DE-627 ger DE-627 rakwb eng Naushath M. Haleem verfasserin aut A Selective Fault Clearing Scheme for a Hybrid VSC-LCC Multi-Terminal HVdc System 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier A selective fault clearing scheme is proposed for a hybrid voltage source converter (VSC)-line commutated converter (LCC) multi-terminal high voltage direct current (HVdc) transmission structure in which two small capacity VSC stations tap into the main transmission line of a high capacity LCC-HVdc link. The use of dc circuit breakers (dc CBs) on the branches connecting to VSCs at the tapping points is explored to minimize the impact of tapping on the reliability of the main LCC link. This arrangement allows clearing of temporary faults on the main LCC line as usual by force retardation of the LCC rectifier. The faults on the branches connecting to VSC stations can be cleared by blocking insulated gate bipolar transistors (IGBTs) and opening ac circuit breakers (ac CB), without affecting the main line’s performance. A local voltage and current measurement based fault discrimination scheme is developed to identify the faulted sections and pole(s), and trigger appropriate fault recovery functions. This fault discrimination scheme is capable of detecting and discriminating short circuits and high resistances faults in any branch well before 2 ms. For the test grid considered, 6 kA, 2 ms dc CBs can easily facilitate the intended fault clearing functions and maintain the power transfer through healthy pole during single-pole faults. LCC-VSC hybrid HVdc transmission systems hybrid multi-terminal HVdc grids HVdc dc side fault recovery dc fault detection and discrimination in HVdc grids Technology T Athula D. Rajapakse verfasserin aut Aniruddha M. Gole verfasserin aut Ioni T. Fernando verfasserin aut In Energies MDPI AG, 2008 13(2020), 14, p 3554 (DE-627)572083742 (DE-600)2437446-5 19961073 nnns volume:13 year:2020 number:14, p 3554 https://doi.org/10.3390/en13143554 kostenfrei https://doaj.org/article/f622fb06c54047b4ae72188711a85a28 kostenfrei https://www.mdpi.com/1996-1073/13/14/3554 kostenfrei https://doaj.org/toc/1996-1073 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 13 2020 14, p 3554
allfieldsSound	10.3390/en13143554 doi (DE-627)DOAJ029949688 (DE-599)DOAJf622fb06c54047b4ae72188711a85a28 DE-627 ger DE-627 rakwb eng Naushath M. Haleem verfasserin aut A Selective Fault Clearing Scheme for a Hybrid VSC-LCC Multi-Terminal HVdc System 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier A selective fault clearing scheme is proposed for a hybrid voltage source converter (VSC)-line commutated converter (LCC) multi-terminal high voltage direct current (HVdc) transmission structure in which two small capacity VSC stations tap into the main transmission line of a high capacity LCC-HVdc link. The use of dc circuit breakers (dc CBs) on the branches connecting to VSCs at the tapping points is explored to minimize the impact of tapping on the reliability of the main LCC link. This arrangement allows clearing of temporary faults on the main LCC line as usual by force retardation of the LCC rectifier. The faults on the branches connecting to VSC stations can be cleared by blocking insulated gate bipolar transistors (IGBTs) and opening ac circuit breakers (ac CB), without affecting the main line’s performance. A local voltage and current measurement based fault discrimination scheme is developed to identify the faulted sections and pole(s), and trigger appropriate fault recovery functions. This fault discrimination scheme is capable of detecting and discriminating short circuits and high resistances faults in any branch well before 2 ms. For the test grid considered, 6 kA, 2 ms dc CBs can easily facilitate the intended fault clearing functions and maintain the power transfer through healthy pole during single-pole faults. LCC-VSC hybrid HVdc transmission systems hybrid multi-terminal HVdc grids HVdc dc side fault recovery dc fault detection and discrimination in HVdc grids Technology T Athula D. Rajapakse verfasserin aut Aniruddha M. Gole verfasserin aut Ioni T. Fernando verfasserin aut In Energies MDPI AG, 2008 13(2020), 14, p 3554 (DE-627)572083742 (DE-600)2437446-5 19961073 nnns volume:13 year:2020 number:14, p 3554 https://doi.org/10.3390/en13143554 kostenfrei https://doaj.org/article/f622fb06c54047b4ae72188711a85a28 kostenfrei https://www.mdpi.com/1996-1073/13/14/3554 kostenfrei https://doaj.org/toc/1996-1073 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2119 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 13 2020 14, p 3554
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author	Naushath M. Haleem
spellingShingle	Naushath M. Haleem misc LCC-VSC hybrid HVdc transmission systems misc hybrid multi-terminal HVdc grids misc HVdc dc side fault recovery misc dc fault detection and discrimination in HVdc grids misc Technology misc T A Selective Fault Clearing Scheme for a Hybrid VSC-LCC Multi-Terminal HVdc System
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topic_title	A Selective Fault Clearing Scheme for a Hybrid VSC-LCC Multi-Terminal HVdc System LCC-VSC hybrid HVdc transmission systems hybrid multi-terminal HVdc grids HVdc dc side fault recovery dc fault detection and discrimination in HVdc grids
topic	misc LCC-VSC hybrid HVdc transmission systems misc hybrid multi-terminal HVdc grids misc HVdc dc side fault recovery misc dc fault detection and discrimination in HVdc grids misc Technology misc T
topic_unstemmed	misc LCC-VSC hybrid HVdc transmission systems misc hybrid multi-terminal HVdc grids misc HVdc dc side fault recovery misc dc fault detection and discrimination in HVdc grids misc Technology misc T
topic_browse	misc LCC-VSC hybrid HVdc transmission systems misc hybrid multi-terminal HVdc grids misc HVdc dc side fault recovery misc dc fault detection and discrimination in HVdc grids misc Technology misc T
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title	A Selective Fault Clearing Scheme for a Hybrid VSC-LCC Multi-Terminal HVdc System
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title_full	A Selective Fault Clearing Scheme for a Hybrid VSC-LCC Multi-Terminal HVdc System
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author_browse	Naushath M. Haleem Athula D. Rajapakse Aniruddha M. Gole Ioni T. Fernando
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title_sort	selective fault clearing scheme for a hybrid vsc-lcc multi-terminal hvdc system
title_auth	A Selective Fault Clearing Scheme for a Hybrid VSC-LCC Multi-Terminal HVdc System
abstract	A selective fault clearing scheme is proposed for a hybrid voltage source converter (VSC)-line commutated converter (LCC) multi-terminal high voltage direct current (HVdc) transmission structure in which two small capacity VSC stations tap into the main transmission line of a high capacity LCC-HVdc link. The use of dc circuit breakers (dc CBs) on the branches connecting to VSCs at the tapping points is explored to minimize the impact of tapping on the reliability of the main LCC link. This arrangement allows clearing of temporary faults on the main LCC line as usual by force retardation of the LCC rectifier. The faults on the branches connecting to VSC stations can be cleared by blocking insulated gate bipolar transistors (IGBTs) and opening ac circuit breakers (ac CB), without affecting the main line’s performance. A local voltage and current measurement based fault discrimination scheme is developed to identify the faulted sections and pole(s), and trigger appropriate fault recovery functions. This fault discrimination scheme is capable of detecting and discriminating short circuits and high resistances faults in any branch well before 2 ms. For the test grid considered, 6 kA, 2 ms dc CBs can easily facilitate the intended fault clearing functions and maintain the power transfer through healthy pole during single-pole faults.
abstractGer	A selective fault clearing scheme is proposed for a hybrid voltage source converter (VSC)-line commutated converter (LCC) multi-terminal high voltage direct current (HVdc) transmission structure in which two small capacity VSC stations tap into the main transmission line of a high capacity LCC-HVdc link. The use of dc circuit breakers (dc CBs) on the branches connecting to VSCs at the tapping points is explored to minimize the impact of tapping on the reliability of the main LCC link. This arrangement allows clearing of temporary faults on the main LCC line as usual by force retardation of the LCC rectifier. The faults on the branches connecting to VSC stations can be cleared by blocking insulated gate bipolar transistors (IGBTs) and opening ac circuit breakers (ac CB), without affecting the main line’s performance. A local voltage and current measurement based fault discrimination scheme is developed to identify the faulted sections and pole(s), and trigger appropriate fault recovery functions. This fault discrimination scheme is capable of detecting and discriminating short circuits and high resistances faults in any branch well before 2 ms. For the test grid considered, 6 kA, 2 ms dc CBs can easily facilitate the intended fault clearing functions and maintain the power transfer through healthy pole during single-pole faults.
abstract_unstemmed	A selective fault clearing scheme is proposed for a hybrid voltage source converter (VSC)-line commutated converter (LCC) multi-terminal high voltage direct current (HVdc) transmission structure in which two small capacity VSC stations tap into the main transmission line of a high capacity LCC-HVdc link. The use of dc circuit breakers (dc CBs) on the branches connecting to VSCs at the tapping points is explored to minimize the impact of tapping on the reliability of the main LCC link. This arrangement allows clearing of temporary faults on the main LCC line as usual by force retardation of the LCC rectifier. The faults on the branches connecting to VSC stations can be cleared by blocking insulated gate bipolar transistors (IGBTs) and opening ac circuit breakers (ac CB), without affecting the main line’s performance. A local voltage and current measurement based fault discrimination scheme is developed to identify the faulted sections and pole(s), and trigger appropriate fault recovery functions. This fault discrimination scheme is capable of detecting and discriminating short circuits and high resistances faults in any branch well before 2 ms. For the test grid considered, 6 kA, 2 ms dc CBs can easily facilitate the intended fault clearing functions and maintain the power transfer through healthy pole during single-pole faults.
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title_short	A Selective Fault Clearing Scheme for a Hybrid VSC-LCC Multi-Terminal HVdc System
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