Electromagnetic Fields Generated by Overhead and Buried Short Conductors. Part 2??? Ground Networks

The fundamental concepts and analytical development related to electromagnetic fields generated by a network consisting of cylindrical conductors arbitrarily located in a conducting homogeneous soil are described and discussed. This method is applicable to overhead conductor networks as well. A comprehensive sensitivity analysis based on the single and multiple point current injection techniques is conducted. In particular, the surface electric and magnetic fields caused by an impressed current between the center point and the four corner points of a grounding network is examined. The analysis is conducted for uniform and two-layer soils. The results show that the electric and magnetic fields can be used for detecting broken conductors. It is also shown that the longitudinal currents, leakage currents, earth potentials, and magnetic fields are influenced by frequency, points of current injection, and configuration of the network.