With the increasing demand in densely populated areas and the consequent lack of space for exclusive transmission line corridors, sharing structures between transmission and distribution lines has become a commonly used solution, especially in emerging countries. This practice causes the electromagnetic interaction between these lines. This paper evaluates the effect of the electromagnetic coupling between a conventional 69 kV line and a compact overhead distribution line (spacer cable system) rated 11.4 kV sharing the same structures. Simulations were performed using the software ATPDraw (Alternative Transient Program) considering steady state conditions, the occurrence of faults on the high voltage line and transmission line energization.
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