Abstract
There are approximately 2000 miles of 765kV transmission lines
already constructed and operating in the United States, with additional
circuits under construction. In the next 5 years it is
expected that another 500 miles of 765kV lines will be installed,
making a total of about 2500 miles. Even with this fairly large
development of EHV lines, it is expected that 1200kV ac or +800kV de,
will be required in the United States by 1985, for regional interties
or energy park power delivery. Because of the difficulty in obtaining
transmission corridors in the U.S. and the realization that a
critical need to increase power transfer capability per circuit mile
exists, a research project was initiated for the design optimization
of conductor support systems suitable for both EHV and UHV voltages,
which would also satisfy environmentally sensitive issues. Use of
new materials, and particularly new application of some of the organic
insulation materials, was encouraged. This paper is presented in
order to share with members of Committee 22 information on the organization
of this project, as well as the progress which has been
made to date.
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