Determination of the current carrying capacity of cables using the finite element method |
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| Affiliation: | 1. Faculty of Electrical Engineering, Bul. K. Aleksandra 73, 11120 Belgrade, Yugoslavia;2. Electricity Board Belgrade, Masarikova 1-3, 11000 Belgrade, Yugoslavia;1. Department of Industrial Engineering, University of Padova, Italy;2. Prysmian Power Link, Milano, Italy;1. Department of Electrical and Computer Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece;2. Department of Electronics and Information Systems, Ghent University, Sint-Pietersnieuwstraat 41, 9000 Gent, Belgium;3. Institute of Electronics, Technical University of Łódź, ul Wolczańska 211-215, 90-924 Łódź, Poland;1. Department of Electrical and Computer Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece;2. Department of Electronics and Information Systems, Ghent University, Sint-Pietersnieuwstraat 41, 9000 Ghent, Belgium;3. Institute of Electronics, Technical University of Lódź, ul. Wolczańska 211-215, 90-924 Lódź, Poland;1. Soil Hydrology, Georg August University of Göttingen, Büsgenweg 2, 37077 Göttingen, Germany;2. Department of Astronautics, Electrical and Energy Engineering, Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy;3. Department of Agricultural Science, University of Bologna, Viale Fanin 44, 40125 Bologna, Italy |
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| Abstract: | Finite element network is composed to determine the temperature rise within and around a three phase 110 kV underground cable bunch that makes it possible to analyze both the transient and the steady-state load conditions for cyclic daily load diagrams. The cable trench profile, bedding made of special mixtures, concrete and asphalt cover and soil and ground surface heat conductance effects are considered including the soil drying out phenomenon. An iterative procedure is suggested for determining the maximum allowable peak load for typical hourly cable load diagrams. The proposed approach was applied to assess the maximum ampacity of a 110 kV cable laid in Belgrade urban area as well as to quantify the favorable effects of the bedding mixture. |
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