Power Quality – Page 30 – Power Quality Blog

SAIFI SARFI & SARFI (X) Indexes for Power Reliability & Power Quality

Published by Terry Chandler, Director of Engineering, Power Quality Thailand LTD/Power Quality Inc., USA. E-mail: terryc@powerquality.org

Characterizing Voltage Sag Waveforms using IEEE P1159.2 Algorithms

Published by Dan Sabin, Monitoring System Applications Architect, Electrotek.

Dranetz Portable Instruments Power Visa & HDPQ Visa using Dran-View 7 Software to View the Waveforms & Correct A CT Connection Error

Case 1. Display waveforms of voltage, current and Power before, during and after an event. Case 2. Display waveforms of voltage, current and calculate the power waveform from the data of any waveforms recorded by the instrument. HDPQ waveforms of Voltage, current and Power from 10 cycles of waveform data. Case 3. Display harmonicContinue reading “Dranetz Portable Instruments Power Visa & HDPQ Visa using Dran-View 7 Software to View the Waveforms & Correct A CT Connection Error”

Active Harmonic Mitigation – What the Manufacturers Don’t Tell You!

Published by Tony Hoevenaars, PEng., MIRUS International Inc.

Instrument Transformers for Measuring Power Quality

Published by Johannes Rickmann, Christian Weber, Trench Switzerland. Tobias Schmutzhard, Omicron Austria.

Harmonics Data Analysis with Dran-View 7 (DV7) Enterprise Software

To do advanced harmonic analysis using the postprocessing capability of Dran-View 7 (DV7) Enterprise. Note: Use the waveform capture on periodic basis to collect the most useful data but not necessary for normal PQ activity and reports. The steps below give a few examples. Step 1. Open the data file of the site of interestContinue reading “Harmonics Data Analysis with Dran-View 7 (DV7) Enterprise Software”

Power Quality & Quality of Supply A Global Continuously Developing Engineering Challenge

Published by Terry Chandler, A Power Quality Practitioner ™ for +30 years, Director of Engineering Power Quality Thailand LTD/Power Quality Inc. USA, Consultant for Dranetz Corporation USA (Asia business Unit General Manager) Contact TerryC@powerquality.org What is Power Quality (PQ)? The characteristics of the supply voltage and the electrical system that affect the performance of theContinue reading “Power Quality & Quality of Supply A Global Continuously Developing Engineering Challenge”

Accuracy of Harmonic Voltage Measurements in the Frequency Range up to 5kHz using Conventional Instrument Transformers

Published by Jan Meyer, Robert Stiegler, Matthias Klatt, Technische Universitaet Dresden, Germany (Jan.Meyer@tu-dresden.de) Micheal Elst, RITZ Instrument Transformers GmbH, Germany (Michael.Elst@ritz-international.com) Erik Sperling, PFIFFNER Instrument Transformer Ltd. Switzerland (Erik.Sperling@pwm.ch) 21st International Conference on Electricity Distribution, Frankfurt, 6-9 June 2011 (Paper 0917) Abstract The measurement of harmonic currents and voltages is a key issue e.g. forContinue reading “Accuracy of Harmonic Voltage Measurements in the Frequency Range up to 5kHz using Conventional Instrument Transformers”