PQBlog

Transformer Derating

Published by Electrotek Concepts, Inc., PQSoft Case Study: Transformer Derating, Document ID: PQS0324, Date: October 10, 2003. Abstract: A principal effect of harmonic distortion is to increase losses and heating in almost every component in the electric power system. While contributing almost no useful work, harmonic components of voltage and current increase the RMS value ofContinue reading “Transformer Derating”

Clean Power for Office Towers

Published by Raghavan Venkatesh, EE Power – Technical Articles: Clean Power for Office Towers, April 12, 2018. This article features EPCOS AG product PQSine S series designed for 3-phase grids with or without neutral conductors and enables harmonics to be filtered. The complex power networks of skyscrapers and other modern buildings must serve a wide rangeContinue reading “Clean Power for Office Towers”

PQ Investigation for SW County School District No. 1 Harmonic Considerations Associated with PC Loads

Published by Electrotek Concepts, Inc., PQSoft Case Study: PQ Investigation for SW County School District No. 1, Document ID: PQS0323, Date: October 10, 2003. Abstract: The County School District has a concern for increasing computer loads at the local High School. There are approximately 300 computers currently in use at the school and plans are toContinue reading “PQ Investigation for SW County School District No. 1 Harmonic Considerations Associated with PC Loads”

Load Flow Analysis in Local Microgrid with Storage

Published by Vishnu SURESH, Dominika KACZOROWSKA, Przemyslaw JANIK, Jacek REZMER, Wroclaw University of Science and Technology Abstract. This paper deals with load flow analysis of local microgrid containing a stochastic renewable energy source and storage. The study is carried out using the Matpower toolbox with all relevant constraints considered regarding storage, power lines and otherContinue reading “Load Flow Analysis in Local Microgrid with Storage”

Electric Utility Harmonic Study Medium Voltage Filter Design

Published by Electrotek Concepts, Inc., PQSoft Case Study: Electric Utility Harmonic Study Medium Voltage Filter Design, Document ID: PQS0407, Date: September 30, 2004. Abstract: This particular utility was experiencing voltage distortion levels throughout their distribution network that were exceeding IEEE Std. 519 limits. One customer, a plastic extrusion plant, was experiencing blown fuses in their switchedContinue reading “Electric Utility Harmonic Study Medium Voltage Filter Design”

Introduction to Off-Grid and Hybrid EV Charging System Architectures

Published by Rakesh Kumar, EE Power – Technical Articles: Introduction to Off-Grid and Hybrid EV Charging System Architectures, December 05, 2022. Off-grid and Hybrid Charging Systems are important components of the electric vehicle ecosystem. Learn more about these architectures in this technical article. Electric Vehicle Charging Stations (EVCS) are the topic of the hour to caterContinue reading “Introduction to Off-Grid and Hybrid EV Charging System Architectures”

Analysis of Transformer Condition by Frequency and Time Methods

Published by Matej KUČERA1, Milan ŠEBOK1, Miroslav GUTTEN1, Daniel KORENČIAK1, Pawel ZUKOWSKI2, Tomasz KOLTUNOWICZ2, University of Zilina, Slovakia (1), Lublin University of Technology, Poland (2) Abstract. Article presents theoretical and experimental analyses of possible mechanical effect of short-circuit currents on the transformer winding by frequency and time methods. The first part of the paper isContinue reading “Analysis of Transformer Condition by Frequency and Time Methods”

Low Voltage Harmonic Filter Design

Published by Electrotek Concepts, Inc., PQSoft Case Study: Low Voltage Harmonic Filter Design, Document ID: PQS0304, Date: January 10, 2003. Abstract: The industrial harmonic problem can be solved using a comprehensive approach including site surveys, harmonic measurements, and computer simulations. When mitigation of harmonic distortion is required, one of the options is to apply a filterContinue reading “Low Voltage Harmonic Filter Design”

Solar-Wind Hybrid Power System Analysis Using Homer for Duhok, Iraq

Published by Mustafa Hussein Ibrahim1, Muhammed A Ibrahim2, University of Mosul (1), Ninevah University(2) Iraq. ORCID: 1. 0000-0002-9950-6524, 2. 0000-0003-4818-1245 Abstract. The government of Iraq recently joined the Paris Climate Agreement, it has now begun to encourage the participation of small and large consumers to generate electricity from renewable energy resources. This article analyses aContinue reading “Solar-Wind Hybrid Power System Analysis Using Homer for Duhok, Iraq”

Substation Resonance and Harmonic Filter Application

Published by Electrotek Concepts, Inc., PQSoft Case Study: Substation Resonance and Harmonic Filter Application, Document ID: PQS0702, Date: July 26 1, 2007. Abstract: A utility operates a 16.2 MVAr capacitor bank on a 24kV substation bus that supplies various customers that have significant amounts of nonlinear loads. The utility is investigating the possible conversion of theContinue reading “Substation Resonance and Harmonic Filter Application”