Determination of current and temperature distribution in overhead conductors by using electromagnetic-field analysis tools

This paper discusses the issue of skin-effect impact on a current´s distribution. It presents an analytical approach for determining temperature distribution by using the Electromagnetic Field Analysis Tool´s two-dimensional (2-D) program (ELEFANT 2D) over the cross sections of tube-type conductors. Using this implemented model, the authors determine the conductor´s current density by taking into account the skin-effect impact on a multilayered bare conductor by the overhead power transmission lines of the ACSR 490/65 mm/sup 2/ type, and the optical cable of the optical ground wire (OPGW) type. An ELEFANT 2D is given an enabling determination of temperature distribution over the tube-type conductor cross section. The authors have developed, using this program, a computerized mathematical model for temperature determination by considering the skin effect in a multilayer ACSR 490/65 mm/sup 2/ conductor, and the optical cable of the OPGW type. The results show temperature distribution in individual layers of the ACSR 490/65 mm/sup 2/ conductor and the OPGW cable by adiabatic heating at different short-circuit currents.