Proximity Effects in Trefoil Cable Arrangement: EMTP Simulation Versus Experimental Validation at Power Frequency

In this presentation three single-core cables with 630 mm2 copper conductors and lead sheathed cores, being in trefoil touching formation, are simulated through EMTP® and evaluated against experimental measurements. Both solid- and single-point sheath bonding configurations are considered. The standing voltages and circulating currents induced in the metallic sheaths are measured and compared against EMTP®. Positive-sequence impedance and loss results are also considered. As demonstrated, significantly better agreement between theoretical and experimental results occur when proximity effects are considered in EMTP®.