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”

Smart Meter and Cost Experiment

Published by Mehmet Sait CENGİZ1University of Yüzüncü Yıl (1) Abstract. System that all stakeholders compound the activities (production, transmission, distribution, sale, consumption) to product and to consume quality, constant, reliable and economic electric energy is called Smart Grid (SG) in electric. SG, which its most important component smart meter (Smart Metering-SM), are advanced energy meteringContinue reading “Smart Meter and Cost Experiment”

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”

A Survey of the Smart Grid Technologies: Background, Motivation and Practical Applications

Published by Yang HAN1, Lin XU2University of Electronic Science and Technology of China (1), Shanghai Jiao Tong University (2) Abstract. This paper presents the survey of the smart grid technologies, including the background, motivation and practical applications. The driving forces for the smart grid technologies are presented, including the blackout, global energy crisis and environmentalContinue reading “A Survey of the Smart Grid Technologies: Background, Motivation and Practical Applications”

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”

Study of 345 kV Transient Recovery Voltages

Published by Electrotek Concepts, Inc., PQSoft Case Study: Study of 345 kV Transient Recovery Voltages, Document ID: PQS0602, Date: January 1, 2006. Abstract: Transient recovery voltage (TRV) is the voltage across the terminals of a pole of circuit breaker following current zero when interrupting faults. TRV waveshapes can be oscillatory, exponential, cosine-exponential or combinations of theseContinue reading “Study of 345 kV Transient Recovery Voltages”

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”