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A New Protection Scheme for an SSSC in an MV Network by Using a Varistor and Thyristors

Erfan Bashar, Dan Rogers, Ruizhu Wu, Li Ran, Mike Jennings Orcid Logo, Timothy C. Green, Phil Mawby

IEEE Transactions on Power Delivery, Pages: 1 - 1

Swansea University Author: Mike Jennings Orcid Logo

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DOI (Published version): 10.1109/tpwrd.2020.2982512

Abstract

To control power flow and manage fault level in meshed MV networks, back-to-back voltage source converters (B2B-VSCs) are being used. However, their high cost and relatively low efficiency are of concerns. Partially rated series compensators, such as SSSCs or UPFCs, are desired but come with the cha...

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Published in: IEEE Transactions on Power Delivery
ISSN: 0885-8977 1937-4208
Published: Institute of Electrical and Electronics Engineers (IEEE) 2020
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URI: https://cronfa.swan.ac.uk/Record/cronfa53888
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first_indexed 2020-03-30T20:17:47Z
last_indexed 2020-07-06T19:16:37Z
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spelling 2020-07-06T17:26:28.9247185 v2 53888 2020-03-30 A New Protection Scheme for an SSSC in an MV Network by Using a Varistor and Thyristors e0ba5d7ece08cd70c9f8f8683996454a 0000-0003-3270-0805 Mike Jennings Mike Jennings true false 2020-03-30 EEEG To control power flow and manage fault level in meshed MV networks, back-to-back voltage source converters (B2B-VSCs) are being used. However, their high cost and relatively low efficiency are of concerns. Partially rated series compensators, such as SSSCs or UPFCs, are desired but come with the challenge of protecting the device during grid faults. Their potential of use has been limited in comparison with the fully rated back-to-back converters. This paper proposes a new system topology including thyristor crowbars and a varistor to protect the SSSC in an MV network and improve the reliability and flexibility of the network operation. Using the proposed method, the time required for isolating the series compensator from the grid is reduced from at least 20 ms, corresponding to the interruption time of conventional circuit breakers, down to 3 μs in the worst case in addition to the grid fault detection delay. The performance is evaluated by simulation. A small-scale single-phase prototype operating at 230 V/16 A is tested in order to demonstrate the concept. Journal Article IEEE Transactions on Power Delivery 1 1 Institute of Electrical and Electronics Engineers (IEEE) 0885-8977 1937-4208 23 3 2020 2020-03-23 10.1109/tpwrd.2020.2982512 https://spiral.imperial.ac.uk/handle/10044/1/77645 COLLEGE NANME Electronic and Electrical Engineering COLLEGE CODE EEEG Swansea University 2020-07-06T17:26:28.9247185 2020-03-30T16:00:03.3087313 Erfan Bashar 1 Dan Rogers 2 Ruizhu Wu 3 Li Ran 4 Mike Jennings 0000-0003-3270-0805 5 Timothy C. Green 6 Phil Mawby 7
title A New Protection Scheme for an SSSC in an MV Network by Using a Varistor and Thyristors
spellingShingle A New Protection Scheme for an SSSC in an MV Network by Using a Varistor and Thyristors
Mike Jennings
title_short A New Protection Scheme for an SSSC in an MV Network by Using a Varistor and Thyristors
title_full A New Protection Scheme for an SSSC in an MV Network by Using a Varistor and Thyristors
title_fullStr A New Protection Scheme for an SSSC in an MV Network by Using a Varistor and Thyristors
title_full_unstemmed A New Protection Scheme for an SSSC in an MV Network by Using a Varistor and Thyristors
title_sort A New Protection Scheme for an SSSC in an MV Network by Using a Varistor and Thyristors
author_id_str_mv e0ba5d7ece08cd70c9f8f8683996454a
author_id_fullname_str_mv e0ba5d7ece08cd70c9f8f8683996454a_***_Mike Jennings
author Mike Jennings
author2 Erfan Bashar
Dan Rogers
Ruizhu Wu
Li Ran
Mike Jennings
Timothy C. Green
Phil Mawby
format Journal article
container_title IEEE Transactions on Power Delivery
container_start_page 1
publishDate 2020
institution Swansea University
issn 0885-8977
1937-4208
doi_str_mv 10.1109/tpwrd.2020.2982512
publisher Institute of Electrical and Electronics Engineers (IEEE)
url https://spiral.imperial.ac.uk/handle/10044/1/77645
document_store_str 0
active_str 0
description To control power flow and manage fault level in meshed MV networks, back-to-back voltage source converters (B2B-VSCs) are being used. However, their high cost and relatively low efficiency are of concerns. Partially rated series compensators, such as SSSCs or UPFCs, are desired but come with the challenge of protecting the device during grid faults. Their potential of use has been limited in comparison with the fully rated back-to-back converters. This paper proposes a new system topology including thyristor crowbars and a varistor to protect the SSSC in an MV network and improve the reliability and flexibility of the network operation. Using the proposed method, the time required for isolating the series compensator from the grid is reduced from at least 20 ms, corresponding to the interruption time of conventional circuit breakers, down to 3 μs in the worst case in addition to the grid fault detection delay. The performance is evaluated by simulation. A small-scale single-phase prototype operating at 230 V/16 A is tested in order to demonstrate the concept.
published_date 2020-03-23T04:07:06Z
_version_ 1763753513793355776
score 11.017797

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