Yearly Archives: 2021

Calculate Neutral Current in Dran-View 7

Published By Terry Chandler, Director of Engineering, Power Quality Thailand LTD/Power Quality Inc., USA. March 2021. Emails: terryc@powerquality.org, terryc@powerquality.co.th Application note to calculate neutral current in DV7 or manually from RMS values manually and automatically with DV7 Enterprise math channels! The neutral current in a three-phase, four-wire wye system represents the imbalance of the three-phase conductors, also knownContinue reading “Calculate Neutral Current in Dran-View 7”

Overview of IEEE STD 1564-2014 Guide for Voltage Sag Indices

Published by Daniel Sabin, Electrotek Concepts , USA and Math Bollen, Luleå University of Technology, Sweden Emails: d.sabin@ieee.org & m.bollen@ieee.org Published in 23rd International Conference on Electricity Distribution, Lyon, 15th-18th June, 2015 ABSTRACT IEEE Std 1564-2014 Guide for Voltage Sag Indices is a new standard that identifies appropriate voltage sag indices and characteristics of electricalContinue reading “Overview of IEEE STD 1564-2014 Guide for Voltage Sag Indices”

Frequency Response of Instrument Transformers in the kHz Range

Published by Dr. Kerstin Kunde, Dr.-Ing. Holger Däumling, Dipl.-Ing. Ralf Huth, Dipl.- Ing. Hans-Werner Schlierf and Dr.-Ing. Joachim Schmid As the number of non-sinusoidal sources and loads in the network continues to grow, the importance of information concerning the quality of the current and the voltage becomes ever more important. Each deviation in frequency canContinue reading “Frequency Response of Instrument Transformers in the kHz Range”

What is Reactive Power?

Published by Peter W. Sauer, Department of Electrical and Computer EngineeringUniversity of Illinois at Urbana-Champaign, September 16th, 2003 Published in Power Systems Engineering Research Center (PSERC) Background Paper on Grid Reliability. Link: https://pserc.wisc.edu/resources/background.aspx Engineering talk Reactive power is a quantity that is normally only defined for alternating current (AC) electrical systems. Our U.S. interconnected gridContinue reading “What is Reactive Power?”