Published by Electrotek Concepts, Inc., PQSoft Case Study: Harmonic Current Cancellation Evaluation, Document ID: PQS1002, Date: March 15, 2010. Abstract: Utility power system harmonic problems can often be solved using a comprehensive approach including site surveys, harmonic measurements, and computer simulations. This case study presents the results for a customer step-down transformer harmonic current cancellation evaluation.Continue reading “Harmonic Current Cancellation Evaluation”
Tag Archives: Harmonics
Importance of Power Quality – Motor
Published by Emerich Energy Private Limited Power quality is of prime importance in deciding the efficiency of any motor. Some of the critical parameters of power quality are • Harmonics• Voltage Unbalance• Voltage Fluctuations In an alternating current (AC) system, the voltage potential and the current through the load circuit are described in frequency andContinue reading “Importance of Power Quality – Motor”
General Reference – Effects of Harmonics at Industrial Facilities
Published by Electrotek Concepts, Inc., PQSoft Case Study: General Reference – Effects of Harmonics at Industrial Facilities, Document ID: PQS0409, Date: September 30, 2004. Abstract: Harmonic currents injected into the system by nonlinear loads, and the voltage distortion they create as they flow through system impedances, can reduce equipment operating reliability and service life. Potential problemsContinue reading “General Reference – Effects of Harmonics at Industrial Facilities”
How High Voltage PTs (VTs) and CTs Limit the Input to PQ Voltage Transient Measuring Instruments and Limit the High Order Harmonic Accuracies of Voltage and Current
Published by Terry Chandler, Director of Engineering, Power Quality Thailand Ltd. & Power Quality Inc., USA. Application Note, Sept. 2013Emails: terryc@powerquality.org, terryc@powerquality.co.th Typical PTs and CTs cause errors and issues in PQ measurements in three areas: 1. Harmonics As the PT and CT have very poor frequency response, they are in affect are a low pass filter onContinue reading “How High Voltage PTs (VTs) and CTs Limit the Input to PQ Voltage Transient Measuring Instruments and Limit the High Order Harmonic Accuracies of Voltage and Current”
General Reference – Modeling for Harmonic Analysis
Published by Electrotek Concepts, Inc., PQSoft Case Study: General Reference – Modeling for Harmonic Analysis, Document ID: PQS0303, Date: January 10, 2003. Abstract: Harmonics have existed on electric power systems for many years. Recently, however, much more attention has been given to monitoring and analyzing the presence and effects of harmonics on utility and customer devicesContinue reading “General Reference – Modeling for Harmonic Analysis”
Harmonic Evaluation at an Industrial Facility
Published by Electrotek Concepts, Inc., PQSoft Case Study: Harmonic Evaluation at an Industrial Facility, Document ID: PQS0502, Date: March 31, 2005. Abstract: A harmonic evaluation was performed at the plastic film manufacturer’s facility. The goals of the evaluation were to develop a solution to mitigate the harmonic voltage distortion caused by the ac and dc adjustableContinue reading “Harmonic Evaluation at an Industrial Facility”
Harmonic Resonance Evaluation for Feeder and Substation Capacitor Banks
Published by Electrotek Concepts, Inc., PQSoft Case Study: Harmonic Resonance Evaluation for Feeder and Substation Capacitor Banks, Document ID: PQS0706, Date: July 27, 2007. Abstract: A utility operates feeder and substation capacitor banks on a 25.56kV distribution feeder. The utility uses frequency scan simulations to determine the effect of distribution feeder and substation capacitor banks onContinue reading “Harmonic Resonance Evaluation for Feeder and Substation Capacitor Banks”
Effect of Distribution Feeder Loading on Harmonic Resonance
Published by Electrotek Concepts, Inc., PQSoft Case Study: Effect of Distribution Feeder Loading on Harmonic Resonance, Document ID: PQS0703, Date: July 26, 2007. Abstract: A utility operates 1200 kVAr and 600 kVAr capacitor banks on a 25.56kV distribution feeder. The utility uses frequency scan simulations to determine the effect of the capacitor banks and seasonal loadContinue reading “Effect of Distribution Feeder Loading on Harmonic Resonance”
Distribution System Harmonic Evaluation
Published by Electrotek Concepts, Inc., PQSoft Case Study: Distribution System Harmonic Evaluation, Document ID: PQS1013, Date: October 15, 2010. Abstract: This case study presents a utility distribution system harmonic analysis evaluation. The simulations were completed using the SuperHarm program. The analysis included frequency response and harmonic distortion simulations for a 13.2 kV substation and several industrialContinue reading “Distribution System Harmonic Evaluation”
Electrical Vehicle Impact on Distribution Network Power Quality
Published by Sampsa KUPARI, Metropolia, Helsinki University of Applied Sciences Abstract: The electrical vehicle form a huge load (and occasionally a generator as well) that is not resistive but possibly of nonlinear character. This may have an effect on distribution network power quality and possibly disturb seriously other consumers. If this is not taken careContinue reading “Electrical Vehicle Impact on Distribution Network Power Quality”
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