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    The Effect of Insulation Defects on Electric and Magnetic Field Distributions in Power Cables
    (Univ Osijek, Tech Fac, 2021) Uydur, Cihat Cagdas; Arikan, Oktay; Kalenderli, Ozcan
    In this article, electrical and magnetic field analysis in XLPE insulated power cables is performed. The defects that may occur in the insulation material have been tried to be realized considering different conditions. A lot of variations have been obtained by changing the location of the defect in the insulation material, the shape of the defect, the size of the defect and the type of the defect. The effect of all the factors that make up the defect on the distribution of the electric field and magnetic field is shown and the causes of malfunction in the cable are examined. The electric field analysis for 1 x 240/25 mm(2) was performed by using different forms with equal areas. The magnetic field analysis was performed for balanced and unbalanced load cases to 3 x (1 x 240/25) mm(2) and 3 x 240/25 mm(2) cable with XLPE insulation.
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    The Effect of Insulation Defects on Electric Field Distribution of Power Cables
    (IEEE, 2018) Uydur, Cihat Cagdas; Arikan, Oktay; Kalenderli, Ozcan
    Electricity transmission with high voltage is usually done with overhead lines by using bare conductors. Population growth in settlements makes it necessary to transmit and distribute electric energy from underground. Insulation is the most important factor in ensuring that electrical energy transmission and distribution with underground cables safely. The insulation problems that may occur in the production of underground cables cause rapidly aging and failures due to partial discharges. In this study, the effect of defects that may occur in the insulation of XLPE insulated cables to electric field distributions in the cable is investigated. In the XLPE insulated cables with 20.3/35 kV, 240 mm(2) and 400 mm(2) conductor cross-sections; electrical field distributions have been investigated by considering problems such as air bubble, water droplets and fiber-like solid particles. Cases of these defects on the surface of the conductor, in the insulator and on the surface of the insulator were considered. The Finite Element Method Magnetics (FEMM) program was used in the analyses.