Category Archives: Power Quality

Power Quality Considerations of Wind Power Plants

Published by David Mueller, P.E., Manager, Power System Studies, Electrotek Concepts, Inc., Knoxville, Tennessee, USA Email: davem@electrotek.com Presented at 2010 Georgia Tech Fault Disturbance Analysis Conference Abstract Wind power plants are the fastest growing power generation source, and this trend is expected to continue. This paper describes the different types of wind power turbine electricalContinue reading “Power Quality Considerations of Wind Power Plants”

Potential Effects of Low Steady State Voltage for Energy Efficiency Improvements on PQ

Published by Bill Howe, P.E., Program Manager, EPRI Power Quality Manager Presented at EPRI PQ and Smart Distribution 2010 Conference and Exhibition:Transporting You into the 21st Century Distribution System, June 14th – 17th, 2010

Measuring Earth Resistance

Published by E. Hering, Dresden (Germany) Earth resistance is a key parameter in determining the efficiency of earthing systems. In this article we look at the measurement of earth resistance 1 A Few Fundamentals 1.1 Earth resistance and earth impedance The efficiency of an earthing system is principally determined by its impedance ZE. As canContinue reading “Measuring Earth Resistance”

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”

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”