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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

OTD

OTE

Research

3269: Methods to Assess the Condition of Stockbridge and Spacer Dampers and Identify Installations with Reduced Damper Life Expectancy

The lifespan of dampers and spacer dampers is impossible to predict precisely due to the variables involved; the prediction of the lifespan of the elastomers commonly used in spacer dampers is especially difficult. In response to asset managers’ desire to anticipate lifespans for dampers and spacer dampers, this report suggests the use of CIGRE design recommendations as the basis for identifying those locations and installations where Aeolian vibration problems may be encountered. The life

Mar 15, 2016 - Feb 7, 2018

OTE

Research

3238: Methodology for Ranking Transmission Lines

Determining which are the most critical or least critical circuits in a transmission system will be dependent on your focus within the electric transmission utility. System Planners will have a different perspective than the Customer Service Representative or the Field Services Engineer. The discussions of planned work on the system may get bogged down with arguments over the most critical line rather than the line that should get the attention. Resources are committed to circuit maintenance wit

Jul 1, 2011 - Jun 4, 2013

OTE

Research

3271: CPF: Condition Assessment of Transmission Line Concrete Foundations

Transmission line foundations are designed to support and stabilize a tower, such that the structure is firmly anchored into the ground and can effectively resist the transferred forces resulting from the applied load cases under consideration. Over time, however, the structural integrity of these foundations can be compromised in a number of ways that could lead to a significant and dangerous weakening of their load bearing capacity. Possible causes include environmental factors like severe wea

Mar 7, 2017 - Aug 4, 2017

OTE

Research

3262: CPF: Up and Coming Methods to Assess Transmission Line Insulators and an Assessment of Their Potential for Implementation

An investigative study was undertaken to determine whether alternative or up-and-coming diagnostic methods have been developed for effectively measuring the integrity of porcelain, toughened glass and polymer/composite insulators, operating at 69 kV or greater, to warrant further lab testing and field trials. A search of available technical literature and information from the manufacturers of diagnostic technologies was conducted as part of Phase 1 of the project. This initial phase aims to inve

Mar 9, 2015 - Mar 1, 2016

OTE

Research

3241: Data Acquisition and Monitoring of Transmission Lines with High Resolution Satellite Images

A pilot project of the potential applications of WorldView-2 (WV-2) satellite imagery was carried out in a test area approximately 20 km north of Atlanta, Georgia, USA, for the benefit of the electric utility industry to validate the potential of using the technology in transmission line asset management operations. The project focused on six specific activities: visual asset inspection, vegetation management, damage assessment, GIS data capture and record validation, transmission expansion and

Apr 16, 2012 - Aug 2, 2013

OTE

Research

3240: CPF: Composite Poles in Transmission & Distribution - Experience and Issues

The Guide for the Use of Composite Poles, Cross Arms and Braces provides a comprehensive reference for the design, use and testing of fibre reinforced composite components such as structural poles, cross-arms and braces applicable for use in the electric power industry. As an integrated resource, the guide was first published in 2008 describing the general requirements for the manufacturing, design, assembly, erection and testing of composite structural shapes and connections for electrical tran

Feb 1, 2012 - Nov 11, 2013

DEP

OTE

Research

3279: CPF: Managing Transmission Line Safety and Reliability Risks through Inspection

Utilities manage the safety and reliability risks of overhead lines through inspection programs designed to detect conditions that warrant mitigation, with an objective to pre-empt or postpone the occurrence of some types of failures. Inspection programs consider age, condition, operating environment, feasibility of performing routine maintenance, regulatory requirements, and other factors in setting the frequency and scope of routine and special patrols. This project provides resources that hig

Mar 1, 2018 - Oct 2, 2019

OTE

Research

3285: Asset Management System for Transmission Lines

In this project, a review was conducted to compare different Asset Performance Management (APM) platforms currently available in the market. The main objective of this project was to determine functions and features that are critical for asset management of transmission lines, examine feasibility of meeting these features, search for commercially available platforms that meet the defined requirements, and set up guidelines on selection of appropriate APMs based on each utility’s specific r

Feb 12, 2020 - Jul 20, 2021

OTE

Research

3263: Conditioned Based Asset Management of Overhead Line Infrastructure-A Probabilistic Framework

Rigorous maintenance practices for overhead lines not only extend an asset’s life, but can also detect damage conditions early to avoid a premature failure, thus avoiding forced outages. Traditional time-based maintenance practices collect inspection data at a fixed time interval and execute maintenance decisions based on the processing of asset condition data, which are primarily deterministic.This report uses a stochastic model (Markov chain model) to apply asset condition data; this mod

Jun 1, 2015 - Mar 14, 2018

OTE

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