Joint slip in steel electric transmission towers

This paper describes the transmission lines that have been built throughout the world to operate above 700 kV. The paper provides information on the system planning, the electrical design, the mechanical and tower design, and the operation and maintenance experience of lines built in the U.S., Canada, South Africa, Brazil, Venezuela, Russia, Korea, India and Japan. Also briefly discussed is the research conducted around the world to develop systems to operate above 700 kV including the research conducted by EPRI at their high-voltage research facility in Lenox, Massachusetts

Overview of transmission lines above 700 kV

This paper describes the transmission lines that have been built throughout the world to operate above 700 kV. The paper provides information on the system planning, the electrical design, the mechanical and tower design, and the operation and maintenance experience of lines built in the U.S., Canada, South Africa, Brazil, Venezuela, Russia, Korea, India and Japan. Also briefly discussed is the research conducted around the world to develop systems to operate above 700 kV including the research conducted by EPRI at their high-voltage research facility in Lenox, Massachusetts.

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Overview of Transmission Lines Above 700 kV

Guyed structures for transmission lines

This paper presents a method for determining the design parameters for an electric transmission line system. A mathematical model is formulated using regression analysis to relate system costs and requirements to the system design parameters. In general, this mathematical model is both nonlinear and nonconvex. Solutions obtained for a specific problem using a nonlinear programming computer code are presented. Although the results are applicable only to this specific problem, the method of analysis is applicable to the general transmission line design problem.

Minimization of the cost of an electric transmission line system

The highlights of the 765-kv tower designs used by the American Electric Power Company are summarized. The weather loading conditions and line design criteria used in developing structure configuration and designs are described. Tower designers and engineers responsible for developing design specifications are alerted to the pitfalls of designing towers without considering all practical combinations of loads (within a loading combination), i.e., combination of some minimum with maximum loads and unequal leg extension combinations in rough terrain. The AEP Computer Program for analyzing towers as three-dimensional elastic structures is highlighted. Comparisons are made to hand (statics) methods used to analyze towers. Alternate types of foundations employed are described, insofar as anchor movement affects structure capabilities.

Tower Designs for AEP 765-KV Project

The design and testing procedures employed in designing the transmission lines for the American Electric Power 765-kV system are discussed. Design methods and testing for towers, anchors, conductors, insulators, and hardware are described.

AEP 765-kV Line Design

In 1966 the design of a 765-kV transmission line network was instigated in the AEP System. This construction project was started in 1967 and is to be completed by 1972. The overall development, design, and construction features of this project, to date, are reviewed.

A. James Samuelson

Papers

Tower Designs for AEP 765-KV Project

AEP 765-kV Line Design

American Electric Power 765-kV Transmission Line Project