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5034: Determination of the Mechanical Resistance of Soils for Distribution Systems

Volume 1: Industry Practices and Soil Engineering ConceptsThe objective of this project was to provide a comprehensive review of available methods for the determination of the mechanical resistance properties of the soil for distribution line installation and construction.By means of a literature search and critical review, a user survey, and input from soil technical experts, the report provides a comprehensive overview of industry practices and Soil Engineering Concepts (presented in Volume 1)

Jan 1, 2004

DEP

Research

5056: Development of a Fault Alert Device for Distribution Transformers

This report describes the design, development and testing of two alpha-prototypes of the Fault Alert (FA), a device intended as an accessory for the fuse cutouts that is capable of detecting and signalling the presence of the low-impedance internal faults in distribution transformers.The FA was conceived as a high impedance current sensor that connects the transformer to the power system once the fault current has been interrupted by the fuse. When there is no internal fault minute current flowi

Aug 1, 2005

DEP

Research

5029: Remaining Life Estimation of Distribution Transformers

Remaining life estimation technologies of transformers have been examined by reviewing technical publications, national and international standards, and surveys of North American utilities. Remaining life estimation was examined from the point of view of condition assessment, available existing and emerging tools, and statistical, deterministic and economic methods. Most utilities make use of visual inspections, company standards and in-house expertise, and a few electrical or oil tests, to deci

Apr 1, 2003

DEP

Research

50166: Mitigating Distribution Overhead System Risks Associated with Wildfires

Electric utility facility involvement in the ignition of wildfires is not uncommon, and unfortunately, the frequency and severity of catastrophic wildfires attributed to utility infrastructure is rising. Historical data indicate that wildfire ignition risk is significantly higher for overhead distribution infrastructure than for transmission and substation facilities, and wildfire damage to distribution equipment typically results in prolonged outages. With the increase in severity, electric uti

Nov 1, 2021 - Nov 8, 2022

DEP

Research

50149: Impact On Worker Safety Of Distributed Energy Resources Connected To The Distribution Grid

Distributed Energy Resources (DERs) are being installed at an accelerated rate, and utility concerns are rising as to the safety impact of this new technology. Multiple sources of energy that are not directly controlled by the utility and power from unusual sources are among these new concerns. The objective of this project is to identify effective practices for maintaining an acceptable level of worker safety in the presence of DER connected to the distribution grid. The research documents seve

May 7, 2018 - May 30, 2019

DEP

Research

5071B: Non-Destructive Condition Assessment of ACSR Distribution Conductors: Field Testing and Evaluation

This project, Phase 3, “Non-Destructive Condition Assessment of ACSR Distribution Conductors – Field Testing and Evaluation” is a continuation of CEATI Project T044700-5040, “Non-Destructive Condition Assessment of ACSR Distribution Conductors – Phase 1” and CEATI Project T074700–5071, “Non-Destructive Condition Assessment of ACSR Distribution Conductors – Phase 2”. Phase 1 was completed in 2005 and Phase 2 was completed in 2009.The obj

Apr 1, 2011

DEP

Research

50124: Gap Analysis of Research Conducted in DG Integration

Distributed generation (DG) presents a number of challenges to distribution system planning and operations because the dispersed connection of generation sources to the distribution system disrupt the traditional paradigm in which the substation is the sole source of power and short-circuit capacity. Furthermore, much of the DG presently being installed is renewable, and thus inherently variable, adding further complexities to distribution system integration. At the same time, DG, in particular

Jul 7, 2014 - Apr 15, 2015

DEP

Research

50110: Data Acquisition and Monitoring of Distribution Lines with High Resolution Satellite Images

A pilot project of the potential applications of WorldView-2 (WV-2) satellite imagery was carried out in a test area inside the Montreal Metropolitan Community (St-Bruno de Montarville) for the benefit of the electric utility industry to validate the potential of using the technology in its distribution line asset management operations. The project focused on six specific activities: visual asset inspection, vegetation management, damage assessment, GIS data capture and record validation, buildi

Apr 1, 2012 - Nov 11, 2013

DEP

Research

3128: Short Circuit Contribution of Renewable Generation

This project addresses utility concerns related to the fault contribution from renewable generators, most prominently wind and solar generators. Accurate information of these fault contributions is needed for selecting equipment ratings and ensuring that the protective device coordination in power systems functions properly. The fault contribution from renewable generators, in particular inverter-based renewable generators, is fundamentally different from the fault contribution from conventional

May 21, 2013 - Nov 1, 2014

Research

5156: Single-Phase Tripping and Single-Phase Lockout on Three-Phase Distribution Circuits

This project identifies present practices and operating results regarding single phase tripping and lockout on three phase circuits. A survey of available literature as well as utilities is used to determine present protection practices and operating results for distribution systems. The survey identifies the statistical information on the type of faults (temporary vs. sustained) and the number of phases involved in distribution system faults. This information can be used to estimate possible im

Jan 10, 2012 - Mar 1, 2013

DEP

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