Tag Archives: Ferroresonance

Ferroresonance in Distribution Systems – State of the Art

Published by Mohamed M. EL-Shafhy1, Alaa M. Abdel-hamed1, Ebrahim A. Badran2,Electrical Power & Machines Department, High Institute of Engineering, El-Shorouk Academy, Cairo, Egypt (1), Electrical Engineering Department, Faculty of Engineering, Mansoura University, Mansoura, Egypt (2) Abstract. Recently, there are increasing interest in studying the ferroresonance phenomenon, due to the various problems it causes to powerContinue reading “Ferroresonance in Distribution Systems – State of the Art”

Medium Voltage Switching Transient Induced Potential Transformer Failures; Prediction, Measurement and Practical Solutions

Published by Daniel McDermit1, David D. Shipp2, Thomas J. Dionise3, Visuth Lorch4,1Sr. Project Manager Turner Construction Company Chicago, IL2PE Eaton Electrical Group Power Systems Engineering Warrendale, PA Fellow, IEEE3PE Eaton Electrical Group Power Systems Engineering Warrendale, PA Senior Member, IEEE4Eaton Electrical Group Power Systems Engineering Warrendale, PA Abstract— During commissioning of a large data center,Continue reading “Medium Voltage Switching Transient Induced Potential Transformer Failures; Prediction, Measurement and Practical Solutions”

Common Power Quality Waveform Signatures

Published by Electrotek Concepts, Inc., PQSoft Case Study: Common Power Quality Waveform Signatures, Document ID: PQS0901, Date: October 15, 2009. Abstract: Power quality problems encompass a wide range of disturbances and conditions on utility and customer power systems. They include everything from very fast transients (microseconds) to long duration (hours) outages. Problems also include steady stateContinue reading “Common Power Quality Waveform Signatures”

Transformer Energizing and Dynamic Overvoltages

Published by Electrotek Concepts, Inc., PQSoft Case Study: Transformer Energizing and Dynamic Overvoltages, Document ID: PQS0709, Date: October 15, 2007. Abstract: Energizing power transformers results in inrush currents that are rich in harmonic components. The inrush current interacts with the system impedance vs. frequency characteristics to create a voltage waveform that can have significant harmonic componentsContinue reading “Transformer Energizing and Dynamic Overvoltages”

Modeling Ferroresonance in an Underground Distribution System

Published by Electrotek Concepts, Inc., PQSoft Case Study: Modeling Ferroresonance in an Underground Distribution System, Document ID: PQS0610, Date: July 1, 2006. Abstract: The objective of this case study is to provide an overview of ferroresonance phenomena, its modeling aspects, and practical experience in recognizing, avoiding, and solving the problem. In particular, it will present symptomsContinue reading “Modeling Ferroresonance in an Underground Distribution System”

General Reference – Ferroresonance

Published by Electrotek Concepts, Inc., PQSoft Case Study: General Reference – Ferroresonance, Document ID: PQS0607, Date: July 1, 2006. Abstract: The term ferroresonance refers to a special kind of resonance that involves capacitor and iron-core inductance. The most common condition in which it causes disturbances is when the magnetizing impedance of a transformer is placed inContinue reading “General Reference – Ferroresonance”

Ferroresonance in an Underground Distribution System

Published by Electrotek Concepts, Inc., PQSoft Case Study: Ferroresonance in an Underground Distribution System, Document ID: PQS0710, Date: October 15, 2007. Abstract: The term ferroresonance refers to a special kind of resonance that involves capacitor and iron-core inductance. The most common condition in which it causes disturbances is when the magnetizing impedance of a transformer isContinue reading “Ferroresonance in an Underground Distribution System”

Ferroresonance Analysis – 25kV Single 5-Legged Core Transformer

Published by Electrotek Concepts, Inc., PQSoft Case Study: Ferroresonance Analysis – 25kV Single 5-Legged Core Transformer, Document ID: PQS0318, Date: July 18, 2002. Abstract: Ferroresonance is a concern for medium voltage underground systems. As part of an evaluation of the design of a new 25kV underground system, the potential for ferroresonance was analyzed. Ferroresonance requires aContinue reading “Ferroresonance Analysis – 25kV Single 5-Legged Core Transformer”