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03103: Testing Plan for Environmentally Acceptable Hydro Plant Oils

The objective of this document was to produce a set of standardized tests (i.e., a test plan) for the evaluation of potential candidates to replace incumbent oils with environmentally acceptable (EA) oils suitable for use in various applications within power plants.With a focus on turbine oils (also seal oils and certain hydraulic fluids) and insulating oils, this test plan was designed to compare the performance of these fluids based on their physical, chemical, and environmental properties. Ce

Nov 28, 2018 - Apr 21, 2020

HPE

Research

3024: Instrument Transformer Condition Assessment and Diagnostics

This project was undertaken to review and suggest improvements in diagnostics and condition assessment techniques for instrument transformers (ITs). A comprehensive literature review was performed to examine the ageing processes of oil-paper insulation used in most ITs, various diagnostic parameters and techniques available for the condition assessment of ITs, and case histories of concerted diagnostic tests carried out by some utilities on groups of ITs. Electrical utilities were surveyed in

Jun 1, 2005

Research

4204: Roadmap for Transmission and Distribution (T&D) Asset Management Investments

Electricity transmission and distribution networks are amongst the most asset-intensive industries. Network owners face increasing pressure to provide better service to customers while minimizing costs. Whilst asset managers typically understand current service levels and the costs associated with maintaining these, they may not be able to demonstrate the efficiency of these investments. Asset managers are under increasing pressure to control their capital and O&M investments but do not always h

Aug 31, 2021 - Jul 27, 2022

Research

3373: Technology Watch on High Temperature, Low Sag Conductors for Transmission Lines

High Temperature Low Sag (HTLS) conductors present one of the most practical and economical solutions that have been considered by utilities to increase the power transfer capacity of transmission lines. This project was undertaken to provide details on various new HTLS conductors including ACSS, metal composite core conductor (such as ACCR), organic composite core conductors (including ACCC, HVCRC, Lo-Sag), gap-type conductors (including GTACSR, GZTACSR), and invar reinforced core conductors (e

Oct 1, 2010 - May 15, 2013

OTD

Research

2025: OTD Project Listings and Matrix

This document summarizes all projects completed within the Overhead Transmission Design group. The document includes topics and focus areas of the group with the corresponding project number of completed projects with the topics. To access the projects listed, members can search for the project number(s) on the CEATI member portal and access all relevant project documents, tools and presentations

Jan 1, 2025 - Jul 31, 2025

OTD

Research

3307: High-Frequency De-Icing of Power Transmission Lines Phase I

Icing of power transmission lines during winter storms is a persistent problem, causing outages and costing millions of dollars in repair expenses. Excitation at approximately 8 kHz to 200 kHz can be used melt ice off of power transmission lines while the lines remain in service. The ice is melted by a combination of dielectric losses in the ice and skin-effect losses in the conductor. This report analyzes the heating effects and develops recommendations for specific excitation patterns for de

Nov 1, 2003

OTD

Research

0551: Optimizing Solar PV + DC-coupled energy storage systems

The enclosed report describes the cost effectiveness of different utility-scale solar + storage projects in different regions of the United States and Canada. The report is built on NREL’s 2016 report, “Evaluating the Technical and Economical Performance of PV Plus Storage Power Plants.” The cost effectiveness of different types of system configurations are evaluated using the PV Steady tool, which works with the System Advisory Model’s Simulation Core (SAM SC) in the background of an Excel user

Oct 1, 2021 - Feb 28, 2023

E&IS

Research

3398B-7: Understanding Vibration Issues in EHV Line Design and Mitigations

This chapter of "Best Practices Guide for Extra High Voltage AC Transmission Lines (230 kV - 765 kV) - Mechanical Aspects of EHV Line Design" is a best practice guide for utility engineers which covers the mechanisms, problems and solutions concerning conductor vibrations.Stand-alone sections are devoted to the different phenomena, beginning with an introduction covering wind characteristics and the basics such as wave propagation velocity, conductor stiffness, resonant frequency, mode shape, lo

May 14, 2020 - Aug 15, 2024

OTD

Research

0205B-3: Investigation of Geophysical Methods for Assessing Seepage and Internal Erosion in Embankment Dams: Interpretation of Self‐Potential Data for Dam Seepage Investigations

T992700‐0205B-3 SP Interpretation Manual This volume marks one of a series of reports on the subject of geophysical methods and their use inassessing seepage and internal erosion in embankment dams. These reports are available both separately and as a package.This report details the interpretation of self‐potential (SP) data generated by subsurface fluid flow, with an emphasis on dam seepage investigations. Practical guidelines for the interpretation of SPdata are provided, with a focu

Dec 1, 1999 - Feb 1, 2007

DSIG

Research

4208: Strategies for Managing the Wave of Approaching Asset End-of-Life

The objective of this project is to provide utilities with strategies for managing their investment when faced with an impending wave of end-of-life assets. These strategies need to work within the context of the electric utilities’ overall asset investment requirements in new investment, replacement, repair, maintenance, enhancement, or refurbishment.

Feb 1, 2023

AMTD

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