Efficient field calculation in three-core belted cable by charge simulation using complex charges

Sheathed three-core belted power cable is simulated by a charge simulation method employing complex charges. Each conductor is simulated by N_c line charges of infinite length. An image charge for each fictitious charge is considered in such a way that the potential of the sheath is always kept at zero. Hence, no charge is necessary to simulate the sheath, which results in efficient modeling. Since complex charges are used for simulation, separate computer runs for different instants in time are not necessary