Published by L. E. Gallego, Student Member IEEE, H. Torres, Member IEEE, F.A. Pavas, Student Member IEEE, D.F. Urrutia, Student Member IEEE, G. A. Cajamarca, and D. Rondón, Student Member IEEE. Abstract—The Estimation of Power Quality (PQ) indices has a vital importance on the development of national PQ standards not only because provides truthful informationContinue reading “A Methodological Proposal for Monitoring, Analyzing and Estimating Power Quality Indices: the case of Bogotá-Colombia”
Category Archives: Case Studies
Feeder Lightning Transients
Published by Electrotek Concepts, Inc., PQSoft Case Study: Feeder Lightning Transients, Document ID: PQS1101, Date: March 15, 2011. Abstract: Lightning strokes to exposed utility transmission or distribution circuits can inject a significant amount of energy into the power system in a very short time, causing deviations in voltages and currents which persist until the excess energyContinue reading “Feeder Lightning Transients”
Steel Plant Transformer Operational Issues
Published by Tadeusz GLINKA1,2, Marek GLINKA2Politechnika Śląska w Gliwicach (1), BOBRME Komel (2) Abstract. Design of steel-plant furnace three-phase transformer (110 kV/(350 to 500) V, 50 kA) and its operating conditions are described in the paper. After three months of operation this transformer failed. Cause of failure, its course and damage to transformer winding areContinue reading “Steel Plant Transformer Operational Issues”
Effect of Synchronous Closing Control on Capacitor Energizing Transients
Published by Electrotek Concepts, Inc., PQSoft Case Study: Effect of Synchronous Closing Control on Capacitor Energizing Transients, Document ID: PQS0903, Date: October 15, 2009. Abstract: The application of utility capacitor banks has long been accepted as a necessary step in the efficient design of utility power systems. In addition, capacitor switching is generally considered a normalContinue reading “Effect of Synchronous Closing Control on Capacitor Energizing Transients”
Distribution System Transient Measurement Data Evaluation
Published by Electrotek Concepts, Inc., PQSoft Case Study: Distribution System Transient Measurement Data Evaluation, Document ID: PQS1012, Date: October 15, 2010. Abstract: This case study presents a utility distribution system transient measurement data analysis. The distribution system included a number of feeders that supplied a mix of residential, commercial, and industrial customers. The causes of theContinue reading “Distribution System Transient Measurement Data Evaluation”
Distribution Feeder Wind Turbine Generator Analysis
Published by Electrotek Concepts, Inc., PQSoft Case Study: Distribution Feeder Wind Turbine Generator Analysis, Document ID: PQS1206, Date: January 26, 2012. Abstract: This case study presents a distribution feeder wind turbine generator analysis. The investigation included several potential causes of turbine and feeder overcurrents and overvoltages, including wind speed variations, cut-out and cut-in switching operations, groundContinue reading “Distribution Feeder Wind Turbine Generator Analysis”
The Effect of PWM Frequency on the Effectiveness of Protection Against Electric Shock using Residual Current Devices
Published by Stanisław CZAPP , Gdańsk University of Technology, Faculty of Electrical and Control Engineering Abstract. In the paper spectral analysis of the distorted earth fault currents in circuits with variable speed drives is performed. Effectiveness of protection against electric shock using residual current devices in circuits with variable speed drives for various PWM frequenciesContinue reading “The Effect of PWM Frequency on the Effectiveness of Protection Against Electric Shock using Residual Current Devices”
Investigation of Harmonic Generation from Dimmable LED Lamps
Published by Sohel UDDIN1, Hussain SHAREEF1, Azah MOHAMED1, M A HANNAN1Dept. of Electrical, Electronic & Systems Engineering (1), Universiti Kebangsaan Malaysia (1) Abstract. The purpose of this paper is to investigate harmonic generation from dimmable Light Emitting Diode lamps (LEDs) which are used in residential and commercial applications as an energy efficient lighting systems. ItContinue reading “Investigation of Harmonic Generation from Dimmable LED Lamps”
Evaluation of Capacitor Bank Switch Restrikes
Published by Electrotek Concepts, Inc., PQSoft Case Study: Evaluation of Capacitor Bank Switch Restrikes, Document ID: PQS0606, Date: April 1, 2006. Abstract: The analysis of high voltage capacitor switching consists primarily of measurements and computer simulations. There are a number of important transient related concerns when transmission and distribution voltage level capacitor banks are applied, includingContinue reading “Evaluation of Capacitor Bank Switch Restrikes”
Customer Adjustable-Speed Drive Motor Failure Evaluation
Published by Electrotek Concepts, Inc., PQSoft Case Study: Customer Adjustable-Speed Drive Motor Failure Evaluation, Document ID: PQS1010, Date: October 15, 2010. Abstract: This case study presents a customer adjustable-speed drive motor winding failure analysis. The study investigated the potential for severe high frequency transient overvoltages at induction motor terminals for an adjustable-speed drive that utilized aContinue reading “Customer Adjustable-Speed Drive Motor Failure Evaluation”
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