Power-line high-frequency characteristics: analytical formulation

The design of digital communication systems via overhead high voltage power-lines, namely digital power line carrier (dPLC), requires knowledge of the power-line high frequency characteristics. The paper derives an analytical formulation for high-voltage power-line high-frequency characteristics: amplitude and phase characteristics and group delay. Analytical expressions are derived for a power-line with three conductors in horizontal disposition and middle phase to ground coupling. These characteristics can be obtained numerically. On the other hand, the analytical description provides the nature of the media.