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Real-time electric field estimation for HVDC cable dielectrics

Real-time electric field estimation for HVDC cable dielectrics
Real-time electric field estimation for HVDC cable dielectrics
For HVDC cables, dielectric field inversion normally occurs due to the temperature drop across the insulation. Unlike AC applications where the field distribution is primarily determined by the cable geometry, the DC field can be significantly affected by the load current and hence the dielectric temperature profile. Higher temperature drops lead to higher electrical stress at the insulation screen, increasing the risk of breakdown. Thus, a real-time dielectric DC field estimator would be very useful to prevent over-stressing the cable. Theoretically, the electrical field can be calculated from the overall dielectric temperature drop. Therefore, by monitoring the temperature profile and integrating with mathematical algorithms, the DC field distribution might be assessed in real time. In this paper, a mathematical algorithm for calculation of the DC field is demonstrated, using standard online temperature monitoring techniques.
condition monitoring, electric breakdown, power cable insulation
978-1-4799-7354-5
1-4
Huang, Z.Y.
2895deda-7290-43b6-bf3c-3ebb118696dd
Pilgrim, J.A.
4b4f7933-1cd8-474f-bf69-39cefc376ab7
Lewin, P.L.
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Swingler, S.G.
4f13fbb2-7d2e-480a-8687-acea6a4ed735
Huang, Z.Y.
2895deda-7290-43b6-bf3c-3ebb118696dd
Pilgrim, J.A.
4b4f7933-1cd8-474f-bf69-39cefc376ab7
Lewin, P.L.
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Swingler, S.G.
4f13fbb2-7d2e-480a-8687-acea6a4ed735

Huang, Z.Y., Pilgrim, J.A., Lewin, P.L. and Swingler, S.G. (2015) Real-time electric field estimation for HVDC cable dielectrics. 2015 IEEE Electrical Insulation Conference (EIC), United States. 07 - 10 Jun 2015. pp. 1-4 .

Record type: Conference or Workshop Item (Paper)

Abstract

For HVDC cables, dielectric field inversion normally occurs due to the temperature drop across the insulation. Unlike AC applications where the field distribution is primarily determined by the cable geometry, the DC field can be significantly affected by the load current and hence the dielectric temperature profile. Higher temperature drops lead to higher electrical stress at the insulation screen, increasing the risk of breakdown. Thus, a real-time dielectric DC field estimator would be very useful to prevent over-stressing the cable. Theoretically, the electrical field can be calculated from the overall dielectric temperature drop. Therefore, by monitoring the temperature profile and integrating with mathematical algorithms, the DC field distribution might be assessed in real time. In this paper, a mathematical algorithm for calculation of the DC field is demonstrated, using standard online temperature monitoring techniques.

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More information

Published date: 7 June 2015
Venue - Dates: 2015 IEEE Electrical Insulation Conference (EIC), United States, 2015-06-07 - 2015-06-10
Keywords: condition monitoring, electric breakdown, power cable insulation
Organisations: EEE

Identifiers

Local EPrints ID: 378044
URI: http://eprints.soton.ac.uk/id/eprint/378044
ISBN: 978-1-4799-7354-5
PURE UUID: 13fc4c62-8d2c-43d6-af3a-317301272326
ORCID for J.A. Pilgrim: ORCID iD orcid.org/0000-0002-2444-2116

Catalogue record

Date deposited: 15 Jun 2015 12:40
Last modified: 19 Nov 2019 01:45

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Contributors

Author: Z.Y. Huang
Author: J.A. Pilgrim ORCID iD
Author: P.L. Lewin
Author: S.G. Swingler

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