Effect of Laying Parameters and Non-sinusoidal Loading Condition of High-Voltage Underground Cables on Electrical Performance by Finite Element Method

Depending on the bonding type, screen currents and screen voltages of high-voltage underground cables have critical importance in the distribution system. These parameters directly affecting energy efficiency and operational safety need to be calculated and evaluated during the system design. Especially in electric vehicle charging stations, energy storage facilities, solar power plants, oil and gas production facilities, and data centers, these parameters become even more critical because of operating with non-sinusoidal loading conditions. It is seen that studies evaluating the electrical performances of high-voltage cables depending on their harmonic loading conditions and ge-ometrical placement characteristics are limited in the literature. This study investigates the screen voltage, screen current, and loss performance of a high-voltage underground cable system consisting of two parallel circuits in different bonding types and layouts depending on the distance between the cables and the non-sinusoidal loading conditions. For this purpose, the cable system was modeled and analyzed in FEM software. In addition, the calculations performed with the finite element method were also verified by the IEC 60287-1-3 method. The study evaluated the performance of the high-voltage underground cable system for a distribution network and emphasized that these analyses should be carried out during the system design.