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Open AccessArticle

Uncertainties in the Testing of the Coefficient of Thermal Expansion of Overhead Conductors

1
Department of Electrical Engineering, School of Engineering Bilbao, University of the Basque Country UPV/EHU, Plaza Ingeniero Torres Quevedo, 1, 48013-Bilbao, Spain
2
Department of Electrical Engineering, School of Engineering Gipuzkoa, University of the Basque Country UPV/EHU, Otaola Etorbidea, 29, 20600-Eibar, Spain
*
Authors to whom correspondence should be addressed.
Energies 2020, 13(2), 411; https://doi.org/10.3390/en13020411
Received: 13 December 2019 / Revised: 9 January 2020 / Accepted: 13 January 2020 / Published: 14 January 2020
(This article belongs to the Special Issue Modelling, Simulation and Control of Thermal Energy Systems)
Overhead lines can be replaced by high temperature low sag (HTLS) conductors in order to increase their capacity. The coefficients of thermal expansion (CTE) of the HTLS conductors are lower than the CTE of conventional conductors. The utilities and conductor manufacturers usually carry out the verification of the CTE of the overhead conductors in an actual size span. The verification is based on the observation of the change of the conductor length as a result of the conductor temperature change. This process is influenced by the coefficient of thermal expansion to be verified. However, there are other factors that also affect it. This paper analyzes the effect of some of the uncertainty sources in the testing of the coefficient of thermal expansion of the overhead conductors. Firstly, the thermal expansion process is described and the uncertainty sources related to the conductor and the line section are identified. Then, the uncertainty sources and their effect on the CTE testing are quantified. View Full-Text
Keywords: high temperature low sag conductor; coefficient of thermal expansion; overhead conductor; low sag performance high temperature low sag conductor; coefficient of thermal expansion; overhead conductor; low sag performance
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MDPI and ACS Style

Bedialauneta, M.T.; Albizu, I.; Fernandez, E.; Mazon, A.J. Uncertainties in the Testing of the Coefficient of Thermal Expansion of Overhead Conductors. Energies 2020, 13, 411.

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