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3397: Review of Non-Ceramic Insulator Standards, Manufacturer Practices and Design Information

This report contains a user survey, literature review and parametric study to investigate the differences, discrepancies and difficulties associated with using manufacturers’ design data to select and analyze non-ceramic insulators. The considered variables include, but are not limited to, the insulator manufacturer, insulator type, line voltage, line angle, conductor size, structure configuration, and insulator strength.Five (5) goals or tasks make up the scope of this project:Task 1 &nda

Sep 29, 2014 - Apr 22, 2016

OTD

Research

3379: New Material for Replacing Copper for Grounding in the Transmission System

Copper has been used by electric utilities from the beginning due to its outstanding thermal and electrical conductivity. One of the more common applications in power transmission has been the use of copper for grounding rods and wires as a critical safety component of any electrical piece of equipment, system, or structure. In such applications, it carries the current generated either from an equipment malfunction or lightning away safely, into the ground. Since copper continues to increase in

Jun 1, 2011 - Mar 5, 2012

GL

OTD

Research

3301: Assessing Design Approaches for Overhead Transmission Lines Under Climatic Loads for New Projects as well as for Verification of Lines to be Upgraded

Based on a survey of the Canadian, American, French and Japanese participating utilities of the CEATI Wind and Ice Storm Mitigation Interest Group (WISMIG), and a review of relevant National and International standards and documents, similarities and differences in the design practices under climatic loads for overhead power lines and components are identified. Structural reliabilities of these design practices are evaluated through three simple cases: as suspension steel lattice tower, a tangen

OTD

Research

3384: Rime Icing Model Validation Using WRF and Full Scale Field Icing Data

The present study deals with the validation of a rime ice accretion model using field data. The data was collected on a non-energized test line located on the top of the Long Range Mountains (LRM) on the west coast of Newfoundland. The test line was equipped with tension measuring devices and the measured ice load was estimated by correlating the change in cable tension to the accumulated ice load. Two models were used which provided the basic meteorological data for the rime ice accretion model

Jul 1, 2012 - Mar 30, 2016

OTD

Research

3393: Dynamic Response of Transmission Lines under Wind

T133700-3393-1This report reviews the literature on the dynamic response of a Transmission Line (TL) system under a conventional atmospheric boundary layer as well as non-synoptic wind loading (downbursts and tornadoes). Gust-induced response for the conductors and towers is covered and limitations in the current structural design codes for wind loading are identified. Four central sections are considered in this study covering synoptic wind loading, downburst, tornado loading, and conclusions a

Sep 1, 2013 - May 8, 2016

OTD

Research

3322: Design Guide to Control Galloping of Transmission Line Conductors

This guide provides a comprehensive review of conductor galloping. The aspects covered include the various weather conditions that lead to galloping, and the locations and types of overhead lines likely to experience galloping. The known information on the effects of galloping—including the magnitudes of the motions, the dynamic loadings applied to the conductors and structures, and the different forms of immediate and long term damage—are described. Recently developed theoretical ap

OTD

Research

33137: Validation of Existing Lattice Transmission Towers Using 2D and 3D Models

OTD

Research

3386: Corrosion Assessment of Tubular Steel Poles

This report evaluates the effectiveness of two commercially available non-destructive evaluation (NDE) technologies in detecting and providing an accurate assessment of below-ground corrosion in tubular galvanized steel poles. The methodology relied on blind field tests on selected poles, followed by excavation for visual inspection and thickness loss measurements. Twelve poles were selected in the same area in Greenwood, SC to provide a meaningful statistical population with different corrosion

Oct 1, 2012 - Jul 1, 2014

OTD

Research

33141: State-of-Art Report on Design/Construction of New Innovative Foundation Designs

Research into innovative foundations for electricity structures is crucial for fostering a sustainable energy future amid climate change challenges. The construction sector, a major contributor to carbon emissions, can greatly benefit from advancements in energy efficiency and sustainability. This shift toward sustainability requires the adoption of new service delivery models and leveraging disruptive technologies; the aim is to develop zero-emission electricity systems that align with global c

Feb 4, 2022 - Jan 18, 2025

OTD

Research

3260-33100: Prevention, Assessment and Remediation of Corrosion in Corten Steel Transmission Line Structures

Electric utilities routinely use weathering steel (WS) in transmission line structures, capitalizing on corrosion resistance and associated cost savings. The formation of a protective iron-oxide patina on uncoated above-ground WS surfaces depends on the operating environment and exposure conditions. In fact, exposure to common aggressive environments, such as those found in sulfate contaminated industrial areas and chloride-laden coastal areas, may dramatically hinder the corrosion resistance of

Sep 5, 2014 - Mar 21, 2017

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