Determination of induced currents and voltages in earth wires during faults

The multiconductor analysis introduced to the study of the current and voltage distributions of power-transmission lines of any configuration may account for the induced currents and voltages in earth wires at any point of interest along a transmission line under normal or fault conditions at any operating voltage levels. The earth wires are employed as individual entities in the analysis along with the line conductors. Huge currents and high voltages are to be induced in earth wires during the occurrence of a fault in the line conductors in extra-high-voltage transmission lines of power frequency. From the safety and reliability point of view, the prediction of induced currents and voltages in earth wires under the fault conditions of the line conductors is significant and important for those power-transmission lines operated at high-voltage or extra-high-voltage levels.