Published by Petr KREJCI1, Pavel SANTARIUS1, Radovan HAJOVSKY1, Richard VELICKA1, Radim CUMPELIK2VSB – Technical University of Ostrava, Czech Republic (1), CEZ, a.s., Czech Republic (2) Abstract. In the paper, the results of the complex monitoring of selected PQ parameters during 12 years will be summarized together with the comparison of the changes of parameters afterContinue reading “PQ Monitoring in Selected Networks of Czech Republic”
Tag Archives: Harmonics
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”
Customer Data Analysis
Published by Electrotek Concepts, Inc., PQSoft Case Study: Customer Data Analysis, Document ID: PQS1102, Date: March 15, 2011. Abstract: Monitoring is often used to characterize power quality levels at various locations on utility and customer power systems. Field measurements provide a convenient means to characterize power quality problems. This case study summarizes a commercial customer powerContinue reading “Customer Data Analysis”
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”
Harmonics / K-factor Ratings
Published by Siemens Canada, Siemens Limited Power Product Catalogue, Canadian Edition 2019. Section 18 – Technical, Contents: Harmonics / K-factor Ratings (18-16, 18-17) Non-Linear Loads When a sinusoidal voltage is applied to a linear load, the resultant current waveform takes on the shape of a sine wave as well. Typical linear loads are resistive heatingContinue reading “Harmonics / K-factor Ratings”
Monitoring and Analysis of Power Quality Issues in Distribution Network
– A Case Study Published by V. S. Jape#1, D. S. Bankar*2, Tejaswini Sarwade#3Electrical Engineering1, Electrical Engineering2, Electrical Engineering3, BVDU Pune1, BVDU Pune2, SPPU Pune31jape_swati@yahoo.co.in , 2dsbankar@bvucoep.edu.in , 3sarwadet@gmail.com Abstract — Tracking of system overall performance in phrases of Power Quality disturbances and its ill effects on distribution network is growing attention of application towardsContinue reading “Monitoring and Analysis of Power Quality Issues in Distribution Network”
Distribution Feeder Energizing
Published by Electrotek Concepts, Inc., PQSoft Case Study: Distribution Feeder Energizing, Document ID: PQS0711, Date: October 15, 2007. Abstract: The energization transients for distribution feeders are generally a combination of line energizing, transformer inrush, and load inrush. Line energizing transients typically decay to negligible values in about one-half cycle and they generally do not pose significantContinue reading “Distribution Feeder Energizing”
Interharmonics: Theory and Modeling
IEEE Task Force on Harmonics Modeling and Simulation Published by A. Testa, M. F. Akram, R. Burch, G. Carpinelli, G. Chang, V. Dinavahi, C. Hatziadoniu, W. M. Grady, E. Gunther, M. Halpin, P. Lehn, Y. Liu, R. Langella, M. Lowenstein, A. Medina, T. Ortmeyer, S. Ranade, P. Ribeiro, N. Watson, J. Wikston, and W. XuContinue reading “Interharmonics: Theory and Modeling”
Electric Power Quality and Ship’s Safety
Published by J. Mindykowski2, E. Szmit1, T. Tarasiuk21 Polish Register of Shipping, Electrical and Automation Department2 Department of Marine Electrical Power Engineering of Gdynia Maritime University 1.Introduction The issue of electric power quality onboard ships has seemed of utmost importance, in particular nowadays when a great progress in implementation of electric drives for ship’s thrusters,Continue reading “Electric Power Quality and Ship’s Safety”
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