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5148: Practical Approaches to Compensating Distribution Circuit Voltage Unbalance

This report assembles a compendium of all approaches to achieve improved voltage balance, both on the utility system and at the customer’s site. Each approach is compared on the basis of its ability to achieve voltage balance. The report identifies commercially available products, describes examples of actual installations, and documents the degree of success at achieving the desired balance levels for those installations. Included in the report is a forward-looking view of potential futur

Jul 1, 2011

Research

5154: Power Quality Impact of Electric and Plug-In Hybrid Vehicles

The continued increase of gas prices and concern on greenhouse gas emissions in recent years have led to gradual acceptance of electric vehicles (EV) by consumers, especially the plug-in hybrid electric vehicles (PHEV),. As these vehicles draw power through power electric circuits from the utility grid when they are being charged, utility companies are concerned with the potential power quality impact of mass penetration of EVs and PHEVs. This project investigates the impact of the PHEVs on both

Oct 6, 2011 - Mar 1, 2013

Research

5164: Power Quality Reference Brochure (Guide) – For Customers and Utility Representatives

This brochure is intended to serve as a quick reference guide for utilities and their customers on identifying common power quality problems and their causes, and how to select appropriate power conditioning measures. This guide includes a review of some of the most important power quality phenomena, including voltage unbalance, voltage sags and swells, momentary interruptions, transients, switching surges, harmonics, notching, and voltage flicker.A section on best practices for characterizing a

Apr 18, 2013 - Jan 6, 2014

Research

5144: Using Distributed Generation in Power Quality Configurations

This report provides new perspectives on how distributed generation (DG) can be applied in ways that enhance both power quality (PQ) and reliability, given the right situations and configurations. To support these new perspectives, the report outlines the background and the methodology needed to understand and quantify distributed generation value propositions, by evaluating the power quality enhancement benefit afforded by such technologies and then describing the best options to achieve these

Aug 1, 2009

Research

5166: Determination of Distribution Network Characteristics Using PQ Waveform Data

Distribution network fault levels or equivalent circuit impedances are important data for both utility companies and their customers. The data has many uses, such as specifying equipment ratings, establishing protective relaying settings, and determining the power quality impact of motor starting, among others. In this project, a novel and practical method has been developed for non-intrusive measurement of network impedances using the waveform data collected by power quality monitors. The metho

May 15, 2014 - Jan 14, 2015

Research

5117: Impact of Harmonics on Utility Equipment: A Survey and Review of Published Work

This report documents the results of a survey of the impacts of harmonics on utility equipment. Eight major pieces of utility equipment -- overhead line, underground cable, transformer, capacitor, reactor, induction motor, synchronous generator and switchgear -- are included in this survey.The effects of harmonics on performance, life expectancy and other operating characteristics for each type of equipment, are reviewed and documented. The mechanisms through which the harmonics produce these ef

Dec 1, 2003

Research

5150: Practical Guidelines for Evaluating Harmonics on Utility and Customer Systems: An Application Guide

The objective of this project was to develop a practical application guide to provide a useful reference for identifying and evaluating power quality waveform distortion and harmonic phenomena. This report includes relevant standards-related information and representative waveforms for many of the common harmonic problems that occur on the electric power system. This report presents the complex subject of power system harmonics using easily understandable terms, guidelines, and examples. In addi

Sep 1, 2009

Research

5149: Impact of Utility Fault-Clearing Practice on Power Quality and Reliability

This project surveys the impact of feeder auto-reclosing, a standard utility fault-clearing practice, on the power quality and power reliability of a distribution system. Auto-reclosing is very useful in increasing the reliability of a distribution feeder. However, it can create momentary interruptions for a large number of customers and negatively impact power quality. This report first reviews the types of power interruptions encountered by utility customers. It then presents the findings on t

Aug 1, 2010

Research

1005: Maximizing Value from Electric Transportation

This study is tailored to provide specific and valuable guidance to electric utilities of all types related to the electric transportation transition and its potential risks, costs, benefits, and value. This guidance will support concrete and immediate next steps for utilities, as well as a pathway to ensure maximum benefits from transportation electrification for electric utility customers and communities, while also distinguishing the requirements between residential and commercial/industrial

Sep 6, 2023

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Research

5168: Alternative & Advanced Uses of PQ Disturbance Data

This report presents a survey on a new class of applications of power quality disturbance data, called power quality data analytics. Power quality has been focused on the harmful aspects of power disturbances in the past. With the widespread use of power quality monitoring tools, more and more users and developers have begun to realize that the disturbance waveforms can carry valuable information about the conditions of the power system and its equipment. As a result, initiatives that explore th

May 1, 2014 - Apr 20, 2015

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