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Accurate modelling of field stresses in an unshielded three-core power cable |
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| Affiliation: | 1. Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil;2. Federal University of São João del-Rei, São João del Rei, MG, Brazil;3. Instituto Superior Técnico, Universidade de Lisboa, Lisboa 1096, Portugal;1. ECpE Department, Iowa State University, Ames, IA 50011, USA;2. Physics Department, University of Alaska, Fairbanks, AK 99775, USA;1. ?UKASIEWICZ Research Network - Institute of Non-Ferrous Metals, Gliwice, Poland;2. Trafeco Sp.J., Boronów, Poland;3. Silesian University of Technology, Faculty of Electrical Engineering/Department of Measurement Science, Electronics and Control, Poland;4. Department of Physics, Czestochowa University of Technology, Czestochowa, Poland;5. Enel-PC Sp. z o.o., Przyszowice, Poland;1. Department of Electrical and Biomedical Engineering, University of Nevada Reno, USA;2. Department of Electrical Engineering, Arkansas Tech University, Russellville, USA;3. Department of Computing, Mathematics and Physics, Western Norway University of Applied Sciences, Bergen, Norway |
| Abstract: | This paper uses the charge simulation technique to calculate the potential and electric field stress distribution at the surfaces of the conductors and the dielectric of an unshielded three-core power cable. The conductors and the sheath are simulated by a suitable finite number of complex line charges. The unshielded three-core cable is placed on a grounded plane and at varying heights above it to calculate the electric field as a function of the height of the insulated cable from the ground. The maximum value of the electric field stress at the grounded plane due to the presence of the insulated three-core cable is detected to check the discharge activities at the grounded plane surface. Comparison is made with field stresses arising from a single-core unshielded insulated cable which are given in the literature. The charge simulation technique is found to be satisfactory to model and calculate accurately the field stresses in a three-core unshielded power cable. |
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