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50109: Leakage Current/Touch Potential Calculation And Test For Overhead Line Covered Conductors

This project investigated safety concerns over leakage current produced by contact between covered conductors and spacer cables. According to the literature, including data provided by OSHA, the threshold for slight disturbing shock is 5 mA. Therefore, this level was considered as the safety threshold for leakage current in this study.A series of tests were conducted with 3 spacer cables with rated voltage of 25kV, 15kV, and 600V. The tests were conducted under different conditions (dry, wet, po

Jun 1, 2012 - Dec 6, 2013

DEP

Research

5178: Enhancing Connectivity of DGs by Control Coordination of Smart Inverters

This Report describes in detail the concepts of hosting capacity for PV systems and its influencing factors. A review of different technologies is presented for increasing the hosting capacity of distribution networks used worldwide for accommodating DGs, with the focus being on PV solar systems. These technologies include conventional equipment such as OLTC, voltage regulators and switched capacitors; energy storage systems; electric vehicle charging systems; and smart inverters.The relative ef

May 7, 2018 - Apr 30, 2020

DEP

Research

5064: Development of a Fault Alert Prototype for Distribution Transformers

The goal set for this project was to develop a working prototype and test the performance of a patented diagnostic tool intended for detection and signalling of potentially hazardous, low impedance internal faults in distribution transformers.The Fault Alert (FA) has been conceived as a high impedance device with an integrated signalling circuit. Following spontaneous activation of a fuse, the device is used to re-connect the transformer to the power supply system in order to check for the prese

May 1, 2008

DEP

Research

50126: Inspection of In-Service Concrete and Steel Power Poles

The objective of this project is to identify and describe industry “best practices” related to the inspection, assessment and maintenance of steel and concrete distribution and street lighting pole structures. These best practices were identified by conducting a thorough investigation of current practices through literature searches, an industry survey, and interviews with leading authorities on these subject matters. This report provides the findings of such research, summarizing it

Jun 6, 2014 - Dec 17, 2014

DEP

Research

50162: Grid Edge Technologies & Their Potential Applications for Utility Distribution Systems

Grid edge technologies are new types of tools for use at or near the edge of an electric power grid,i.e., secondary distribution systems, low voltage distributed energy resource (DER) facilities, andcustomer premises. Utility customers have been increasingly embracing grid edge technologies inrecent years. In the view that power distribution systems are at the forefront of interacting with gridedge technologies, this project conducted a comprehensive survey of this industry trend, particularlyon

Oct 1, 2020 - May 11, 2021

DEP

Research

5061C: Tutorial for Analysis Functions of the Deficiency Ranking Method for Distribution Systems

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, 2011

DEP

Research

50122: Update of the Surge Arrester Application Guide, Phase II

This is a comprehensive application guide for the selection of surge arresters for use on distribution and subtransmission systems. The guide is organized into ten sections that outline respectively:Arrester Characteristics and TechnologiesArrester Parameters ExplainedCauses of Abnormal Voltages on Distribution SystemsArrester SelectionSurge Protection DesignArrester DeploymentArrester PerformanceArrester TestingModel Representation of ArrestersCase Studies and ExamplesBackground information is

Jan 2, 2014 - Jan 19, 2015

DEP

Research

50169: A Guide to Mitigate Adverse Impacts of EV Charging Stations on Distribution Systems

This guide is designed to help distribution utilities evaluate and mitigate the effects that increased use of electric vehicles and their related charging have on power demand and overloading risk. The guide covers current adoption forecasts and possible network impacts. It also contains useful suggestions for detecting and reducing the impact of EV charging loads on distribution grids and recent case studies of possible network management solutions.Keywords:Electric vehicles, EV, charging, fore

Aug 11, 2021 - Aug 31, 2024

DEP

Research

5045: Technical Requirements to Help Formulate a Polymer/Composite Cutout Specification

The project consisted of formulating a Technical Product Requirement Specification that will help utilities jump-start the writing of a future North American polymer/composite cutout standard. A brief history of past problems associated with porcelain cutouts is presented to help better understand their specific reasons for and modes of field failure. The project scope included a brief literature review of available technical information to establish a base from which to work regarding composi

Apr 1, 2005

DEP

Research

50153: Framework for Deriving Failure Probability Functions for Underground Cables

Underground cables typically represent assets that carry an elevated risk within the distribution system when compared to other distribution system assets. There are limited inspection and maintenance practices that can be actively performed for underground cables to further extend their useful life, due to the fact that these cables are typically contained underground – either direct-buried or in conduit – and possess limited accessibility. Furthermore, the outright replacement of c

May 28, 2018 - Jul 19, 2019

DEP

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