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Electromagnetic Dispersion Modeling and Measurements for HVDC Power Cables

Gustafsson, Stefan; Biro, Thomas; Cinar, Gokhan; Gustafsson, Mats LU ; Karlsson, Anders LU ; Nilsson, Börje; Nordebo, Sven LU and Sjöberg, Mats (2014) In IEEE Transactions on Power Delivery 29(6). p.2439-2447
Abstract
This paper provides a general framework for electromagnetic (EM) modeling, sensitivity analysis, computation, and measurements regarding the wave propagation characteristics of high-voltage direct-current (HVDC) power cables. The modeling is motivated by the potential use with transient analysis, partial-discharge measurements, fault localization and monitoring, and is focused on very long (10 km or more) HVDC power cables with transients propagating in the low-frequency regime of about 0-100 kHz. An exact dispersion relation is formulated together with a discussion on practical aspects regarding the computation of the propagation constant. Experimental time-domain measurement data from an 80-km-long HVDC power cable are used to validate... (More)
This paper provides a general framework for electromagnetic (EM) modeling, sensitivity analysis, computation, and measurements regarding the wave propagation characteristics of high-voltage direct-current (HVDC) power cables. The modeling is motivated by the potential use with transient analysis, partial-discharge measurements, fault localization and monitoring, and is focused on very long (10 km or more) HVDC power cables with transients propagating in the low-frequency regime of about 0-100 kHz. An exact dispersion relation is formulated together with a discussion on practical aspects regarding the computation of the propagation constant. Experimental time-domain measurement data from an 80-km-long HVDC power cable are used to validate the electromagnetic model, and a mismatch calibration procedure is devised to account for the connection between the measurement equipment and the cable. Quantitative sensitivity analysis is devised to study the impact of parameter uncertainty on wave propagation characteristics. The sensitivity analysis can be used to study how material choices affect the propagation characteristics, and to indicate which material parameters need to be identified accurately in order to achieve accurate fault localization. The analysis shows that the sensitivity of the propagation constant due to a change in the conductivity in the three metallic layers (the inner conductor, the intermediate lead shield, and the outer steel armor) is comparable to the sensitivity with respect to the permittivity of the insulating layer. Hence, proper modeling of the EM fields inside the metallic layers is crucial in the low-frequency regime of 0-100 kHz. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
IEEE Transactions on Power Delivery
volume
29
issue
6
pages
2439 - 2447
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • wos:000345513600003
  • scopus:84913596312
ISSN
1937-4208
DOI
10.1109/TPWRD.2014.2324181
language
English
LU publication?
yes
id
39a05c65-6ca2-4be5-a870-d83fa42b689f (old id 4628012)
date added to LUP
2014-09-08 12:28:32
date last changed
2017-05-28 03:18:16
@article{39a05c65-6ca2-4be5-a870-d83fa42b689f,
  abstract     = {This paper provides a general framework for electromagnetic (EM) modeling, sensitivity analysis, computation, and measurements regarding the wave propagation characteristics of high-voltage direct-current (HVDC) power cables. The modeling is motivated by the potential use with transient analysis, partial-discharge measurements, fault localization and monitoring, and is focused on very long (10 km or more) HVDC power cables with transients propagating in the low-frequency regime of about 0-100 kHz. An exact dispersion relation is formulated together with a discussion on practical aspects regarding the computation of the propagation constant. Experimental time-domain measurement data from an 80-km-long HVDC power cable are used to validate the electromagnetic model, and a mismatch calibration procedure is devised to account for the connection between the measurement equipment and the cable. Quantitative sensitivity analysis is devised to study the impact of parameter uncertainty on wave propagation characteristics. The sensitivity analysis can be used to study how material choices affect the propagation characteristics, and to indicate which material parameters need to be identified accurately in order to achieve accurate fault localization. The analysis shows that the sensitivity of the propagation constant due to a change in the conductivity in the three metallic layers (the inner conductor, the intermediate lead shield, and the outer steel armor) is comparable to the sensitivity with respect to the permittivity of the insulating layer. Hence, proper modeling of the EM fields inside the metallic layers is crucial in the low-frequency regime of 0-100 kHz.},
  author       = {Gustafsson, Stefan and Biro, Thomas and Cinar, Gokhan and Gustafsson, Mats and Karlsson, Anders and Nilsson, Börje and Nordebo, Sven and Sjöberg, Mats},
  issn         = {1937-4208},
  language     = {eng},
  number       = {6},
  pages        = {2439--2447},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  series       = {IEEE Transactions on Power Delivery},
  title        = {Electromagnetic Dispersion Modeling and Measurements for HVDC Power Cables},
  url          = {http://dx.doi.org/10.1109/TPWRD.2014.2324181},
  volume       = {29},
  year         = {2014},
}