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50145: Direct Buried Duct Vs. Concrete Encased Duct Housing for Primary and Secondary Cable

Presently, electrical ducts are made primarily of plastic materials. Polymers such as polyethylene (PE) and polyvinyl chloride (PVC) are excellent candidates to replace historical cast concrete, cement or clay ducts used in distribution networks. These polymers present with high strength, low friction coefficient, corrosion resistance, light weight, easy handling, and superior weathering characteristics. Other polymers, such as fiberglass reinforced thermosetting resins, are being used in ducts

Jul 17, 2017 - Oct 12, 2019

DEP

Research

3411-3: Transmission Underground Cable Reference Manual - Chapter 3: XLPE Transmission Cable Design

Many North American power utilities are installing cross-linked polyethylene insulated cables when a new underground transmission is required. This type of cable system has replaced fluid-filled cables, which were formerly the most frequently specified type of underground transmission system. These cables, which are commonly referred to as XLPE cables, have very stringent requirements. However, the elimination of dependence on pressurization systems does reduce the complexity compared to fluid p

Jun 11, 2020 - Jan 19, 2022

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

OTD

OTE

Research

0144: Best Practice Guidelines for the Operation and Maintenance of Steam Condensers and their Auxiliaries

For a thermal power station to operate an efficient closed cycle, the condensing plant, the cooling water system, and associated pumps must extract the maximum quantity of heat from the LP turbine exhaust steam to provide the lowest economic heat rejection for that steam cycle. The system must also convert the exhaust steam back to water for reuse and collect re-useable heat from the drains of the turbine, the feed heaters, and other auxiliaries. Clearly the steam condenser plays an extremely im

Oct 10, 2016 - Mar 29, 2018

TGIG

Research

3705B: Grounding System Health Index Methodology

This report describes the health degradation modes of different components of grounding systems, and reviews the best industry practices for inspection and testing of grounding systems. The best practices for assessing health and condition of various components of the grounding systems include preventative maintenance in the form of periodic inspections and testing of grounding systems. The results of each of these inspections and tests can be expressed on a numeric scale and by assigning approp

GL

Research

33131: Development of Fragility Models for Key Line Components

OTD

Research

G945: SONOX Demo

TGIG

Research

0235: Dam Safety Risk Management Training

Jan 22, 2016 - Aug 24, 2017

DSIG

Research

33101: State of the Art report on Designing Transmission Lines for Wet Snow Accumulation

Wet snow occurs in any region of the world where snow falls at ambient temperatures of around 0ºC. Wet snow may be sticky and easily adhere to exposed objects, such as electric transmission lines. Significant loading on transmission lines may result from wet snow accumulation, especially on conductors and ground wires; therefore, transmission lines must be designed to withstand such loads.It has been identified that wet snow accumulation is not sufficiently addressed in the current transmis

Sep 1, 2015 - Jul 30, 2017

OTD

Research

0393: Hydraulic Generating Station Penstock Maintenance and Repair Reference Manual

An experienced team of engineers and hydropower professionals was assembled to develop a comprehensive maintenance and repair guide for aging in-service penstocks with the primary objective of providing the hydropower industry with a document that integrates the best available information and practices into a single-point source. The guide aims to enhance understanding of penstock risks and potential failure modes (PFMs) while providing guidance for maintenance and repair practices. The end resu

Feb 6, 2017 - Dec 7, 2018

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