Magnetic vector potential based model for skin effect calculation in medium voltage power lines

An analytical development of the magnetic vector potential is used in order to investigate the skin effect inside a conductor. The current distribution in electrical wires is affected by the skin effect and the field created by adjacent wires (proximity effect). This field depends on the current distribution in conductors, resulting in a closed-form problem. In this paper, we obtain the vector potential outside a conductor and we estimate the effect of induced currents in the field shape over the neighbouring conductors. Broadband over power line communication systems (BPLC) are using the medium voltage power lines as a broadband access network. Since the signal attenuates over the line, with higher losses at higher frequencies, the profound knowledge of skin effect is important because it can compromise the performance of BPLC.