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5031: Condition Assessment of Porcelain Fused Cutouts

The mechanical condition of fuse cutout insulators is critical to their proper operation in the field. A break in the insulator can lead to dangerous situations with uncontrolled electrodes. This report looks at methods for determining cutout condition with the view of field applications. Several of the methods were tried on some field examples of cracked cutouts. In addition, possible safety devices that could protect line staff while operating these devices were examined. One such device

Aug 1, 2003

DEP

Research

5061: Deficiency Ranking Method For Distribution System Inspections

Inspection of distribution feeder circuits is an integral part of the maintenance efforts of electric distribution utilities. A consistently encountered issue with these inspections is the subjectivity surrounding this manual process that relies so heavily on the judgement of the Inspector. This was acknowledged in 2005 by the CEATI Distribution Assets Life Cycle Management (DALCM) Interest Group through the commissioning and completion of Project T044700-5058, “Distribution Power Line Ins

Aug 1, 2007

DEP

Research

0605: Asset Class Strategies for Battery Energy Storage Systems

The objective of the project is to develop a guideline to assist asset managers of electric utilities to develop an asset class strategy for their BESS assets. The guideline will flow from the requirements of ISO 55000. The guideline will demonstrate how the BESS project objectives link to the utility's Asset Management Objectives and the utility's Corporate Objectives. The guideline will clearly define the BESS assets. The guideline will clearly designate the decision points / points of conside

Jan 2, 2024

AMIG

AMTD

Research

5013: Reliability of Steel Distribution Poles

The reliability of two classes of galvanized steel distribution poles was investigated in this study. Accelerated corrosion tests on the steel pole samples were carried out using 1000 hours of salt fog exposure to evaluate the performance of the galvanized and bituminous polyurethane coatings. The effect of wall thickness loss of the steel pole on its bending strength and buckling strength was examined using small-scale and full-scale tests. The effect of dents on the bending strength of the s

Mar 1, 2004

DEP

Research

3416: Best Practices Guide to Underground Power Cable Real-Time Thermal Rating Systems

An application guide was commissioned by member utilities interested in practices for implementing real-time thermal ratings on underground transmission cables, consisting of extruded, self-contained fluid-filled and pipe-type systems. This report summarizes the results of an industry survey of TUCIG members and non-utility members, and describes the characteristics, application considerations, and summary of suppliers of these systems. The results show that real-time thermal ratings have been a

Nov 7, 2012 - Dec 21, 2013

TUC

Research

3316B: Spatial Factors for Extreme Ice and Extreme Wind: Task 1 Literature Review on the Determination of Spatial Factors

A concern of utilities is the spatial effect, which is the increase in risk of large structures, such as transmission lines, to environmental loads compared to point structures. The CSA standard for overhead lines specifies a spatial factor of 1.5 be applied to the mapped 50-year point ice thicknesses. In the United States, the spatial effect is discussed in ASCE standards and guidelines, but no spatial factor is specified. This report is a review of the literature on the spatial effect for both

Oct 1, 2003

OTD

Research

5160: Understanding, Avoiding and/or Mitigating Distribution Power Lines Electrical Noise Transfer to Communication Circuits

The increasing number of harmonic producing loads on the distribution system causes concerns for telephone interference with facilities that are installed in close proximity to the feeders. This project is intended to describe the mechanism of noise transfer and methodologies to limit excessive interference levels.The following items are discussed in the report: (1) noise sources, (2) coupling mechanism, (3) receptor circuit, (4) standards and interference limits, (5) measurements and (6) mitiga

Mar 23, 2012 - Feb 6, 2013

Research

3046: Transformer Failure Modes: Causes, Detection and Monitoring

This work is the first step of a larger project to identify, evaluate, and make recommendations for the application of existing and developing systems for continuous on-line monitoring and automated expert data interpretation systems for transformers and load tap changers (LTCs). This initial work focuses on the causes, detection, and monitoring of the failure modes of the different components of substation transformers. The conditions leading to the specific failure mode and their causes are

Oct 1, 2009

Research

30123: CPF: Guide for Loading of In-service Aged Power Transformers

Most power transformer failures can be correlated with deterioration of the insulation system over time. The existing IEEE Std. C57.91-2011 gives a basic aging mechanism for simplified loading studies, which is based on hot-spot temperature rise alone. It also assumes an average useful life of 20 years for power transformers. There is a need for this useful life assessment to be updated based on practical considerations.There has been extensive research conducted in the past decade towards incor

Mar 19, 2018 - Jul 12, 2019

Research

3204: Development of a Condition Assessment Methodology for H-Frame Transmission Line Wood Crossarms

Transmission line supporting structures and their components in electric power systems have been subject to regular inspections in order to assess their condition and identify those in need of replacement or repair. In-service components such as wood crossarms are susceptible to deterioration that could result in loss of strength and potentially lead to unforeseen failures.Strategies for crossarm inspections vary considerably from organization to organization and are mainly developed based on in

May 1, 2006

OTE

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