Understanding Total Harmonic Distortion

White Paper Published by Cowles Andrus, Communications Specialist, Power Monitors Inc., September 2012 Email: candrus@powermonitors.com ABSTRACT This paper discusses the causes of Total Harmonic Distortion, how it is calculated, measured, and how it can impact a power distribution system. Total Harmonic Distortion (THD) can be a challenging concept because of the complexity of the powerContinue reading “Understanding Total Harmonic Distortion”

Advantages of 6-Pulse VFD with Lineator AUHF vs Active Front End (AFE) Drives

White Paper (August 20th, 2015) Published by Anthony (Tony) Hoevenaars, P. Eng , President and CEO Mirus International Inc. INTRODUCTION Active Front End (AFE) Drive manufacturers will claim that their technology provides the best solution for treatment of harmonics associated with variable frequency drives (VFDs). They are quick to point out benefits over standard 6-PulseContinue reading “Advantages of 6-Pulse VFD with Lineator AUHF vs Active Front End (AFE) Drives”

EPRI PQ Knowledge Development and Transfer 2020 Year-End Update

January 2021 The EPRI Power Quality Knowledge Development and Transfer supplemental project provides a wealth of high-impact resources in a well-designed, readable, and accessible format. Paramount among these are numerous and highly readable documents covering a wide range of PQ topics, written not only for use by busy PQ professionals, but also to expedite problemContinue reading “EPRI PQ Knowledge Development and Transfer 2020 Year-End Update”

How to Conduct an Energy Audit Using the Energy Platform EP1

White Paper Introduction Sophisticated energy analyzers introduced in the 80s were able to trend and record energy usage and help identify when, where, and how much electrical energy was being used. However, due to limited user-interface capabilities, these analyzers printed to paper tape and tended to be complex to operate. At that time, the costContinue reading “How to Conduct an Energy Audit Using the Energy Platform EP1”

An Investigation on the Validity of Power-Direction Method for Harmonic Source Determination

Published by Wilsun Xu and Xian Liu, Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB, Canada Yilu Liu, Department of Electrical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA Published in IEEE Transaction on Power Delivery, Vol. 18, No. 1, January 2003 Abstract The power-direction method has been used widelyContinue reading “An Investigation on the Validity of Power-Direction Method for Harmonic Source Determination”

Interaction between Grid-Connected PV systems & LED Lamps: Directions for Further Research on Harmonics and Supraharmonics

Published by Tatiano Busatto, Fahim Abid, Anders Larsson and Math H. J. Bollen, Electric Power Engineering, Luleå University of Technology, Skellefteå 931 87, Sweden Email: tatiano.busatto@ltu.se Gaurav Singh, Department of Electrical and Computer Engineering, Clemson University, Clemson, South Carolina 29634, USA                             Continue reading “Interaction between Grid-Connected PV systems & LED Lamps: Directions for Further Research on Harmonics and Supraharmonics”

The Importance of Good Power Quality

Published by Dr. Kurt Schipman & Dr. François Delincé , ABB Power Quality Products, Belgium ABSTRACT This paper explains the problems that are due to poor Power Quality in electrical systems and shows their possible financial consequences. Power Quality is characterized by parameters that express harmonic pollution, reactive power, and load unbalance. The best possibleContinue reading “The Importance of Good Power Quality”

Smart Capacitor

Published by Wendy Wang, Jiangsu Modern Electric Technology Co., Ltd. The first developer of smart capacitor in China; Nantong, Jiangsu, China. Introduction Smart capacitor integrates such advanced technologies as modern measure-control, power electronics, network communication, automation control, power capacitor and others. It changes the outdated controller technology of traditional reactive power compensation device and theContinue reading “Smart Capacitor”

Voltage Disturbances Flicker Measurement

Published by Zbigniew Hanzelka & Andrzej Bie´n, AGH University of Science and Technology, October 2005 Flicker Measurement Introduction The power supply network voltage varies over time due to perturbations that occur in the processes of electricity generation, transmission, and distribution. Interaction of electrical loads with the network causes further deterioration of the electrical power quality.Continue reading “Voltage Disturbances Flicker Measurement”