Abstract
Open transmission access and economic Ullcertamtles
are the reasons why many North American utilities are
operating their lines at much higher loads than they
were initially designed for. Because of this. IEEE's
WG on Thermal Aspects of Conductors and Accessories
has been actively engaged in studying the effects of
higher operating temperatures on the safety and
reliability of overhead lines. The work has identified
significant areas where improved analyticalmetilods are
necessary. Several such methods have already been
created and their impact is discussed in the following
repOli.
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