Abstract
This paper discusses the electromagnetic unbalances of transmission lines caused by mutual impedances. The unbalance factors of 27 different transmission line configurations have been studied by using a digital computer. The impacts of transposition, phase arrangement, additions of transformer, and capacitors to the lines in terms of circulating currents, sequence impedances, and net through and circulatory unbalance factors have been investigated extensively. Furthermore, the impact of “n” overhead ground wires on the electromagnetic unbalance factors of untransposed single‐ and double‐circuit transmission lines have been studied and the results have been tabulated and plotted.
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