Power Quality – A Worldwide Problem

Published by Terry Chandler, Director of Engineering, Power Quality Thailand LTD/Power Quality Inc., USA. January, 2001 E-mail: terryc@powerquality.org, terryc@powerquality.co.th What is Power Quality? The characteristics of the supply voltage and the electrical system that affect the performance of the load. The characteristics of the load that affect the electrical system or other loads. ITIC Curve CBEMA Curve Power QualityContinue reading “Power Quality – A Worldwide Problem”

Evaluating Rapid Voltage Changes & its Propagation Effect using Multipoint Measurement Technique

Published by Muhammad Imam Sudrajat, University of Twente Enschede, The Netherlands, Indonesian Institute of Sciences, South Tangerang, Indonesia    m.i.sudrajat@utwente.nl Niek Moonen, University of Twente Enschede, The Netherlands niek.moonen@utwente.nl Hans Bergsma, Thales Nederland B.V. Hengelo, The Netherlands hans.bergsma@nl.thalesgroup.com Rob Bijman, Thales Nederland B.V. Hengelo, The Netherlands rob.bijman@nl.thalesgroup.com Frank Leferink, University of Twente Enschede, The NetherlandsContinue reading “Evaluating Rapid Voltage Changes & its Propagation Effect using Multipoint Measurement Technique”

PQ Monitoring Standards – What You Need To Know

DESCRIPTION There’s an age-old problem in the Power Quality (PQ) monitoring industry – measure the same circuit with instruments from different manufactures at the same time, and you could get different results! Which one do you believe? Do you trust any of them? There have been electrical energy monitoring standards for many years that defineContinue reading “PQ Monitoring Standards – What You Need To Know”

Voltage Tolerance Boundary

Published by Pacific Gas and Electric Company (PG&E), January 1999. The only national standard for utilization voltage regulation is ANSI C84.1. Its title is American National Standard for Electric Power Systems and Equipment – Voltage Ratings (60 Hertz). The first version in 1954 was a combination of two standards, one from the Edison Electric InstituteContinue reading “Voltage Tolerance Boundary”

Interpretation & Analysis of Power Quality Measurements

Published by Christopher J. Melhorn, Electrotek Concepts, Inc. Knoxville, Tennessee Mark F. McGranaghan, Electrotek Concepts, Inc. Knoxville, Tennessee ABSTRACT This paper describes advances in power quality monitoring equipment and software tools for analyzing power quality measurement results. Power quality monitoring has advanced from strictly problem solving to ongoing monitoring of system performance. The increased amountContinue reading “Interpretation & Analysis of Power Quality Measurements”

Simple Rules for Solving Power Quality Mysteries

Published by Richard P. Bingham, Dranetz Technologies, Inc., USA Prepared for the Conference on Protecting Electrical Networks and Quality of Supply, Heathrow, UK, 22-23 January 1997 ABSTRACT The typical power quality problem starts with a frantic call to the facility’s engineer or electric shop supervisor concerning some malfunction that has either shut down production orContinue reading “Simple Rules for Solving Power Quality Mysteries”

Determining Sag Directivity

Application Note INTRODUCTION Voltage sags, or dips are the most common type of power quality (PQ) event. Knowing the directivity of the sag, or where it originated, is very import when trying to locate its source and to ultimately mitigate the problem. This application note outlines some rules of thumb to help determine the directivityContinue reading “Determining Sag Directivity”