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A technical and economic comparison between traditionally employed and emerging fault level management solutions at distribution voltages

A technical and economic comparison between traditionally employed and emerging fault level management solutions at distribution voltages
A technical and economic comparison between traditionally employed and emerging fault level management solutions at distribution voltages
Network fault levels are reported to be increasing and this is often attributed to an increase in network interconnectivity and localised generation. When the fault level at a substation increases beyond the rated value of the installed equipment, a power utility traditionally responded by either (i) replacing the equipment with higher rated equipment or, (ii) installing series reactors or, (iii) replacing the existing transformers with high impedance transformers. Using a South African case study, this paper compares both the effectiveness and financial viability of a superconducting fault current limiter (SFCL) against the traditional three options. When one also considers the operational or ‘energy’ cost associated with all these options it was found that a high capital cost was sometimes offset by lower energy costs over a 25 year service life. Regional prices of electricity and tariffs therefore have a significant impact on a utility’s choice of fault management solutions.
0000-1991
31-38
Khan, M.F.
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Jarvis, A.L.L.
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Young, E.A.
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Stephen, R.G.
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Khan, M.F.
9a756cbe-5e4e-4784-a0b0-c9e38d13b829
Jarvis, A.L.L.
13be0adb-078f-44ca-a819-55da65142434
Young, E.A.
d3a881b0-a564-41f5-9843-34ae86da360f
Stephen, R.G.
a9c3fd22-1848-4fee-abef-be938790c4a0

Khan, M.F., Jarvis, A.L.L., Young, E.A. and Stephen, R.G. (2017) A technical and economic comparison between traditionally employed and emerging fault level management solutions at distribution voltages. SAIEE Africa Research Journal, 108 (1), 31-38. (doi:10.23919/SAIEE.2017.8531514).

Record type: Article

Abstract

Network fault levels are reported to be increasing and this is often attributed to an increase in network interconnectivity and localised generation. When the fault level at a substation increases beyond the rated value of the installed equipment, a power utility traditionally responded by either (i) replacing the equipment with higher rated equipment or, (ii) installing series reactors or, (iii) replacing the existing transformers with high impedance transformers. Using a South African case study, this paper compares both the effectiveness and financial viability of a superconducting fault current limiter (SFCL) against the traditional three options. When one also considers the operational or ‘energy’ cost associated with all these options it was found that a high capital cost was sometimes offset by lower energy costs over a 25 year service life. Regional prices of electricity and tariffs therefore have a significant impact on a utility’s choice of fault management solutions.

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Accepted/In Press date: 23 November 2016
e-pub ahead of print date: March 2017
Published date: March 2017
Organisations: Engineering Science Unit

Identifiers

Local EPrints ID: 405053
URI: http://eprints.soton.ac.uk/id/eprint/405053
ISSN: 0000-1991
PURE UUID: 67fd2120-1c8b-4f9a-a9fe-294c259f6c08

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Date deposited: 26 Jan 2017 13:31
Last modified: 21 Nov 2021 05:20

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Contributors

Author: M.F. Khan
Author: A.L.L. Jarvis
Author: E.A. Young
Author: R.G. Stephen

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