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Failure of MV Cable Terminations due to Supraharmonic Voltages: A Risk Indicator
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.ORCID iD: 0000-0001-6074-8633
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.ORCID iD: 0000-0002-4004-0352
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.ORCID iD: 0000-0003-4074-9529
2020 (English)In: IEEE Open Journal of Industry Applications, E-ISSN 2644-1241, Vol. 1, p. 42-51Article in journal (Refereed) Published
Abstract [en]

This paper addresses the accelerated aging of medium-voltage (MV) cable terminations with resistive stress-grading due to supraharmonics. The paper introduces a simple and quick way to relate the risk of cable termination failure to the characteristics of supraharmonic distortion in the system. The motivation is to give practical recommendations and guidelines to evaluate the risk of failure of cable terminations under the presence of supraharmonics in MV networks. The underlying model relates the heating in the cable termination linearly with the frequency of the voltage applied and proportionally with the square of the magnitude of the voltage. The indicator can be used to decide whether given levels and frequencies of supraharmonics in the MV network represent a risk to cable terminations. The parameters of the cable termination design are not needed for that decision. However, the decision criterion is based on one sample data (Eagle Pass) and more field information is crucial to improve the approach.

Place, publisher, year, edition, pages
IEEE, 2020. Vol. 1, p. 42-51
Keywords [en]
dielectric breakdown, dielectric losses, power cable insulation, power quality, power system harmonics, supraharmonics
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electric Power Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-79169DOI: 10.1109/OJIA.2020.2998000Scopus ID: 2-s2.0-85103286625OAI: oai:DiVA.org:ltu-79169DiVA, id: diva2:1434872
Note

Godkänd;2020;Nivå 0;2020-08-19 (johcin)

Available from: 2020-06-04 Created: 2020-06-04 Last updated: 2024-03-07Bibliographically approved

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Espín-Delgado, ÁngelaSudha Letha, ShimiRönnberg, Sarah K.Bollen, Math H. J.

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