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5092: Satellite Technology Applications for Monitoring Electric Utility T&D Assets and Rights-of-Way

A review of the potential applications of Earth observation satellites was carried out for the benefit of the electric utility industry to determine the feasibility of using the technology in its operations. Focusing on nine specific activities that usually make use of aerial photography and other forms of detailed geospatial data/information, the study provides examples of potential applications and assesses their likelihood of implementation and the forecasted barriers to their introduction. T

Apr 11, 2012

DEP

OTE

Research

3253: Technical Product Requirement Specification to Help Formulate a Composite / Polymer Interphase Spacer Specification

The project formulated a Technical Product Requirement Specification or standard that will help utilities jump-start the writing of a future international polymer/composite interphase spacer (IPS) standard. The project scope included a brief literature review of available technical information; this is to establish a knowledge base regarding composite and polymer materials, as well as polymer product manufacturing techniques. Service experience was obtained by undertaking a technical survey of u

Nov 4, 2013 - Dec 1, 2014

OTE

Research

3243: Corrosion Assessment of Below Grade Transmission Line Steel

A large percentage of transmission lines in existence today have exceeded or are reaching their 50 year design life. The below ground foundations are subject to corrosion, and as their condition is difficult to assess, they are often neglected because of the lack of inspection techniques. Visual inspection by excavation is the predominant method used by utilities; however, this process is labor intensive, costly and is only practical if the corrosion is limited to a small depth below ground

Apr 16, 2012 - Jan 24, 2014

OTE

Research

3273: CPF: Guidelines for Transmission Line Pole and Tower Steel Capacity based on Corrosion Degradation

Steel transmission structures have been in service for more than 100 years. As they age, these structures are experiencing metal loss both above and below ground level due to corrosion. Significant questions have arisen regarding how much corrosion wastage (section loss) is acceptable before some type of remedial action is required. Assessing the remaining capacity of a structure due to corrosion wastage and the associated loss of member thickness is a complex process due to the different failur

Feb 20, 2017 - Oct 15, 2018

OTE

Research

3230B: CPF: Condition Assessment of Below Grade Steel Structures and Life Extension Methodologies: Rewrite, Improve and Properly Reference Content

This report presents a technology review of methodologies for the assessment of below-grade corrosion damage in stand-alone and concrete-encased steel members that support transmission line structures, with an emphasis on guy-anchor rods and lattice tower members. First, based on the outcomes of a world-wide survey of utilities, baseline information are presented on how leading utilities assess and maintain buried members of overhead transmission line steel structures, and what structures are of

Feb 23, 2014 - Dec 1, 2014

OTE

Research

3216: CPF: Technology Watch on Polymer Insulator Knowledge

Polymer (composite) insulators for electric power transmission lines have evolved since their initialcommercial success in the 1980s to mature designs that, on average, deliver similar or betterreliability than reported for ceramic insulators in utility surveys. However, detection of polymerinsulator deterioration prior to end of life failure does not have a well-developed history. Live-linetechniques that work well for ceramic insulators, such as visual inspection, “buzz” and &ldquo

Mar 1, 2009

OTE

Research

3212: CPF: Lightning Arresters and Active Horn Gaps

Advances in lightning protection technology are leading to a new generation of reliable, low-cost transmission line surge arresters (TLSA) that offer the promise of eliminating lightning outages, possibly without using costly overhead groundwires. Recently, it has been recognized that gapped metal-oxide TLSA give more protection for the same cost as gapless TLSA, have fewer adverse side effects in some conditions and may be the only practical option above 300 kV.This survey report describes the

Nov 1, 2006

OTE

Research

3227A: CPF: Methods for Improving Ground Resistance of Transmission Structures, Phase I

A low-impedance electrical connection of a transmission tower to remote earth through the local soil provides lightning protection and power system fault current management. The structure grounding can take several forms, including the tower foundation itself, supplemental vertical rods, or buried horizontal counterpoise wires. This Technology Review identifies and describes all methods currently used for improving the ground resistance of transmission line structures. A simplified equation (

Nov 1, 2010

OTE

Research

3210A: CPF: Ultrasonic Assessment of the Condition of Tower Legs, Phase I: Feasibility Study

This Progress Report covers work on Phase 1 “Feasibility study – Lab Testing andDevelopment” scheduled for this period. The legs of steel transmission towers start to corrodeonce they have been installed and buried. A reliable method of assessing the condition of theburied structures is required. The idea of ultrasonic determination of the buried structurescondition is based on the excitation of traveling acoustic waves in the leg. Equipment forinspection consists of pulser-rec

Jul 18, 2006 - Sep 15, 2006

OTE

Research

3219: Life Cycle Cost Analysis

In order to stay competitive, electric utilities are required to invest in the upgrade and expansion of their infrastructures to provide services to an increasing customer base. Since these projects require significant investments, utilities are increasingly interested in accurately identifying the initial construction cost and maintenance costs in order to determine the lowest life cycle cost and the total cost of ownership. In this report, an integrated model is presented which consistently

Jul 1, 2009

OTE

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