HVPL conductor sag influence on induced voltage evaluation in nearby metallic structures

The electromagnetic interference between high voltage power lines and nearby metallic structures has presented an important research subject over the last decades. The current paper investigates conductors sag influence on the proper evaluation of the inductive coupling between high voltage overhead power lines and nearby metallic structures, emphasizing on underground pipelines. A piecewise hybrid method implemented in the InterfStud EMI software, developed by the authors is applied, to analyze the 3D electromagnetic interference problem, calculating induced AC currents and voltages. The evaluation error introduced by neglecting conductors sag is determined for different power line and common right-of-way configurations.