Abstract
Discusses power system design for open access transmission. Hundreds of technical papers were written prior to deregulation in the 1990s regarding the optimization of new transmission line designs. A common goal was to minimize electrical losses and capital investment in conductors, structures, and rights of way by choosing the right conductor size within the boundaries of corona and electromagnetic fields. At the time, it was, to some extent, possible to predict the line power flow for new lines at least 10–20 years into the future. Since the advent of open-access transmission, the development of new power generation by wind and solar sources, the sometimes rapidly shifting fuel costs (i.e., gas versus nuclear and coal), and environmental restrictions on conventional generation, it is no longer possible to predict the line-load magnitude and daily load shape for most new lines over their expected design life of 40 years.
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