Reliability-Based Design of Transmission Line Structures

by Paul F. Lyons, EPRI, United States,



Document Type: Proceeding Paper

Part of: Structural Design, Analysis and Testing

Abstract:

Reliability-Based Design (RBD) is an emerging concept for the design of transmission line structures and holds the potential to reduce the cost of lines or increase their reliability. On attractive alternative for increasing the electrical capacity of transmission corridors is to reconductor lines using existing structures. This option can sometimes offer significant cost savings. A primary question in reconductoring studies is the adequacy of the exiting facilities to support the proposed new conductors. An analysis of the structure is necessary to determine if a structure is capable of supporting the higher loads and to determine the change in reliability index of the existing line configuration and the proposed configuration. It is therefore, important to know the accuracy of the structure analysis, and the accuracy and repeatability of the test values. The purpose of this paper is to attempt to quantify the level of repeatability that can be expected when testing lattice transmission structures.

Subject Headings: Structural reliability | Power transmission lines | Structural analysis | Failure analysis | Structural design | Load tests | Failure loads

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