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OVERHEAD CONDUCTOR SUPPORT SYSTEMS FOR UHV LINES U. S. DEPARTMENT OF ENERGY RESEARCH PROJECT REPORT FOR PRESENTATION TO STUDY COMMITTEE #22 AT CIGRE MEETING IN PARIS SEPTEMBER 6, 1978

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(1978)

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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