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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

SE

Research

3309C: Tests Conducted on Anti-Icing and De-Icing Products

1- The B-Free product from MISI showed the best anti-icing properties, preventing ice accumulationup to 8 mm on a horizontal surface under the best conditions. The product has to be applied justbefore the freezing rain event; applying the product many days before the event would reduce theeffectiveness because of leaking and washout. Anti-Icing effect is much less effective on nonhorizontalsurfaces for all products.2- Ice adhesion with the Third Rail and B-Free products from MISI was much less t

OTD

Research

5174: Impact of Mass Penetration of LED Bulbs and Small Device Chargers on Distribution Networks

Most members of IEC, IEEE and CSA working groups assume that small devices cause negligible harmonic distortion on the power system. Without any measurement, simulation or technical study substantiating this assumption there is a perception that any low-power equipment below 75 W is producing a negligible distortion level. Since field measurements have shown that significant harmonic levels exist in the voltage supply at all times, it is important to find the origin of this distortion.Triplen ha

Mar 24, 2016 - Dec 20, 2016

PQ

Research

5051: Ultrasonic Assessment of Porcelain Insulated Fused Cutouts

Porcelain insulated cutouts are commonly used by North American utilities. Typically, the insulator portion of the cutout fails gradually due to hairline cracks which develop in the porcelain. It would be desirable to have available a rapid, easy and relatively inexpensive non-destructive method to evaluate the mechanical condition of the insulator. The objective of the project was to develop a prototype device for the cutouts field testing. Keywords:Ultrasound, Resonance technique, Porcelain cu

DEP

Research

3730: Determination of Transmission Tower Footing Resistance Target

This report investigates the rationale used by transmission utilities to determine tower footing resistance/impedance limits, the main criteria to be considered to establish these limits, when the limits can be modified, present-day technologies and tools for measuring tower footing resistance/impedance, and methods to improve the ground resistance/impedance of transmission line structures.Keywords:Transmission line, reliability, lightning, AC fault current, grounding

Aug 21, 2019 - Jun 19, 2024

GL

Research

0503: SFA Pacific Membership

E&IS

Research

5076: State-Of-The-Art Assessment of Requirements for Attachments of WiFi Equipments to Electric Utility Facilities

In recent years, electric utilities have been receiving an ever increasing number of requests to attach WiFi equipment to their systems. Some promises are being made to provide sponsors and school districts with “free” internet service to help the WiFi provider gain access to the electric utility system. Many utilities are not prepared to respond to these requests. This is often due to the fact that the electric utility industry has not had sufficient time to formally review and comm

DEP

Research

50144: Testing Based Condition Assessment of Medium Voltage Distribution Cables

There are many diagnostic techniques commercially available for medium voltage (MV) cable systems. These techniques have varying sensitivities and modes of application. However, since there is no North American standard for test-based condition assessment of MV cable systems, circuit owners are faced with what can be a confusing array of choices and selection of the most appropriate techniques for a particular application can be challenging. Several independent bodies such as CEATI, NEETRAC, and

May 15, 2017 - Jul 12, 2018

DEP

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

SE

Research

5082: Resiliency of Overhead Lines to Trees and Branches

Many utilities experience severe weather patterns that affect their System Average Interruption Duration Index (SAIDI) and System Average Interruption Frequency Index (SAIFI) reliability statistics. Reliability indices are important measures of a utility’s distribution system performance and are monitored to achieve high levels of service and safety.The increase in SAIDI and SAIFI during wind storms or severe weather can often be attributed to trees and branches contacting overhead distrib

DEP

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