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30122: Enhanced Diagnostics and Condition Assessment of LTCs

Although progress has been made over the last 20 years, there still remain unresolved problems with load tap changers (LTCs) that need to be addressed. In particular, coking of LTC components remains a major problem. There is currently no non-invasive method to determine the inception of coking, its presence and severity, and its relation to LTC make and model.This report summarizes the research findings of a study which used a small scale LTC model to carry out accelerated LTC operations. The o

May 8, 2017 - Aug 18, 2018

Research

3034: Identifying and Documenting Existing Electromagnetic Interference EMI Detectors That Forecast Insulation Breakdowns in Substations, Phase I

This report is the culmination of a three‐month benchmark study to identify the available devices in the marketplace that can detect insulation breakdown on electric utility structures and equipment. This report identifies and describes eight different technologies that can detect various stages of insulation breakdown. They are (listed in alphabetical order):Acoustic,Infrared,Night Vision,Radio Frequency (RF) Characterization,Radio Frequency (RF) Directional,Ultrasonic,Ultraviolet, andUltravio

Sep 1, 2006

Research

30110: Substation Resiliency Assessment, Design Improvement Considerations and Restorations Planning for Non-Utility Triggered Events

Electrical utilities are under increasing pressure to perform under a wide range of non-utility triggered events including natural events, such as extreme weather and flooding, as well as human-induced events such as physical and cyber-attacks. New research into electro-magnetic pulse and geomagnetic disturbances has demonstrated an exposure to risks not previously considered. This report reviews the current understanding of the risks faced by utility substation infrastructure, examines ongoing

Apr 8, 2016 - Jun 1, 2017

Research

30102B: Evaluating the Advanced Substation Monitoring Capabilities of Digital Fault Relays, Fault Recorders, Power Quality Monitors, and PMU Equipment - Phase II

This project, CEATI SEAM 30/102B: “Evaluating the Advanced Substation Monitoring Capabilities of Digital Protective Relays, Fault Recorders, Power Quality Monitors and PMU Equipment – Phase II”, is a follow up work of the previous project, CEATI SEAM 30/102A, that EnerNex completed in 2016. The Phase I project included: 1) description of advanced substation monitoring applications, 2) summary of applicable standards, and 3) capabilities of advanced substation monitors. This Pha

Jun 26, 2018 - Dec 12, 2018

Research

3042: End of Life Decision Support Model for Transformer Load Tapchangers

The objective of this project was to develop a detailed, structured, quantitative methodology (model)to rank a diverse population of Transformer Load Tapchangers (LTCs) in order of proximity to theirEnd of Life (EOL).By means of a literature survey and discussions with technical experts and utility engineers, relevantfactors and information have been identified which should be included in the ranking decisionsupport model, taking into account the data typically available within utilities.Informa

Jul 1, 2007

Research

30135: Guide for Condition Assessment of Service Aged Power Transformers using Dielectric Frequency Response

Power transformers and bushings are critical assets in the electric power network from an operational and economic perspective. Establishing the actual condition of the transformer insulation system is an important requirement for proper maintenance and risk assessments. High moisture content in the transformer paper insulation has been found to reduce the overall dielectric strength, limit the loading capability, and accelerate aging of the transformer.Dielectric frequency response (DFR) testin

Sep 3, 2019 - Jun 16, 2021

Research

30104: Station Equipment: Failure Rates

This project was initiated to identify the failure rates used by utilities for station equipment. There is a need to accurately determine the failure rates for different types of station apparatus and to examine the trends of such rates as an important component of equipment strategy. An increasing trend may indicate that the equipment is approaching its end of life and that specific maintenance, spare parts and replacement strategies should be considered. Management and external regulators requ

Dec 17, 2014 - May 27, 2016

Research

3072: Power Transformer Specification Guide

This report documents the information collected during this study, including the literature search, analysis of all available data and the utility survey. Based on the direct experience and knowledge gained from project authors developing transformer specifications collectively for over 80 years, as well as the analysis of all data, the report provides the utilities with the recommended specification clauses and other good practices that can help utilities with their transformer specification ne

Jul 1, 2011 - Sep 10, 2013

Research

30134: Arrester Temperature Monitoring System Development and Potential Commercialization

The operating condition of surge arresters is oftentimes a concern after a surge or lightning event on the system. The options available in the market to determine the health of arresters are quite limited both technically and commercially. In response to this issue, the full development of a partially developed system was proposed. What was missing in the product design process was data collection software, final hardware selection, a communications system to the cloud, high current impulses, a

May 6, 2019 - Feb 24, 2021

Research

3055A: Health and Risk Index Tool for Circuit Breakers

This report describes the health degradation modes of different categories of circuit breakers employed on transmission and distribution systems, reviews the best industry practices for inspection and testing of circuit breakers and provides a methodology and a software tool for determining the health and condition of circuit breakers. Guidelines are also provided for the use of the condition assessment tool and interpretation of the results.Keywords: Circuit breakers, Transmission and distribut

Aug 1, 2010

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