Published by Richard Lam, CHK Power Quality Pty Ltd. Website: http://www.chkpowerquality.com.au Abstract. Transformer harmonic current derating metrics; Harmonic Loss Factor, K-Factor, and Factor K are introduced, and used to calculate derating factors for dry and oil-filled type transformers. Introduction The introduction of Switched Mode Power Supplies (SMPS) in office equipment and LED lighting, Variable Frequency/SpeedContinue reading “An Introduction to Transformer Harmonic Current Derating Metrics”
Tag Archives: Transformers
Voltage Sag Mitigation Using Direct Converter Based DVR without Error Signal
Published by 1. S. Abdul Rahman, 2. Estifanos Dagnew Mitiku, 3. Shumye Birhan Mule, 4. Gebrie Teshome Aduye, 5. Mekete Asmare Huluka, 6. Solomon Mesfin Institute of Technology, University of Gondar, Ethiopia Abstract – Dynamic voltage restorer is considered to be one of the best device to compensate voltage sag and swell. Recently the DVRsContinue reading “Voltage Sag Mitigation Using Direct Converter Based DVR without Error Signal”
Diagnostics of Transformer Insulation by Frequency Domain Spectroscopy
Published by Miroslav GUTTEN, Daniel KORENCIAK, Peter BRNCAL, Viktor CEFER, University of Zilina, Slovakia Abstract. The paper deals with the diagnostics of insulation oil-paper in high-voltage transformers by frequency diagnostic spectroscopy. The first part of paper deals with the base information about diagnostics of power transformers. In this part are presented differently insulating methods, forContinue reading “Diagnostics of Transformer Insulation by Frequency Domain Spectroscopy”
Differential Relay Protection for Prototype Transformer
Published by Bashar M. SALIH, Mohammed A. IBRAHIM, Ali N. HAMOODI, Northern Technical University Abstract. This paper represents the differential protection relay that used to protect the prototype-Terco power transformer. Matlab/Simulink is used to simulate the protection system. The power differential protection algorithm has been simulated and tested on a 2KVA power transformer under differentContinue reading “Differential Relay Protection for Prototype Transformer”
The Influence of Radiators Construction on Vibroacoustic Measurement of a Power Transformer
Published by Szymon BANASZAK1, Eugeniusz KORNATOWSKI2, Zachodniopomorski Uniwersytet Technologiczny w Szczecinie, Katedra Elektrotechnologii i Diagnostyki (1), Zachodniopomorski Uniwersytet Technologiczny w Szczecinie, Katedra Przetwarzania Sygnałów i Inżynierii Multimedialnej (2) Abstract. The paper presents an example of transformer tested with complementary tests methods: Frequency Response Analysis and Vibroacoustic Measurement. Methods applied together allow for higher quality ofContinue reading “The Influence of Radiators Construction on Vibroacoustic Measurement of a Power Transformer”
Potential Transformer Operation, Applications and Accuracy
Published by Alex Roderick, EE Power – Technical Articles: Potential Transformer Operation, Applications and Accuracy, July 14, 2021. Learn about the operation and accuracy of potential transformers. The high voltages typically seen on power lines are a hazard to technicians working on or near the power lines. It is a difficult task to design a voltmeterContinue reading “Potential Transformer Operation, Applications and Accuracy”
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”
Transformer Inspection and Testing
Published by Alex Roderick, EE Power – Technical Articles: Transformer Inspection and Testing, December 17, 2021. Installing a transformer is more than just connecting the wires, according to the wiring diagram. The first part of the installation process includes an initial inspection and testing of the transformer when it is received from the factory or warehouse.Continue reading “Transformer Inspection and Testing”
Protection Transformer and Transmission Line in Power System Based on MATLAB Simulink
Published by Mohammed A. IBRAHIM1, Bashar M. SALIH2, Mahmoud N. Abd3,Power Technical Engineering Department, Northern Technical University (1,2)Ninavah Electricity Distribution, Directorate General Directorate of North Distribution Electricity, Ministry of Electricity, Iraq (3)ORCID. 1. /0000-0003-3182-2771, 2. 0000-0002-2437-0765, 3. https://orcid.org/0000-0002-8018-0093 Abstract. The main objective of this research work is to build a simulation model of a powerContinue reading “Protection Transformer and Transmission Line in Power System Based on MATLAB Simulink”
Transformer Losses and Efficiency
Published by Alex Roderick, EE Power – Technical Articles: Transformer Losses and Efficiency, June 16, 2021 In this article we will learn about the four main types of transformer losses and calculations for finding the efficiency of a transformer. Transformers, like all devices, are not perfect. While ideal transformers do not have losses, real transformers haveContinue reading “Transformer Losses and Efficiency”
Power Quality Blog 