Author Archives: PQBlog

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”

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”

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”

Voltage Sag Study – Application of a Static Transfer Switch

Published by Electrotek Concepts, Inc., PQSoft Case Study: Voltage Sag Study – Application of a Static Transfer Switch, Document ID: PQS0317, Date: July 18, 2003. Abstract: The purpose of this case study is to determine the feasibility of reducing process equipment disruptions due to utility voltage sags at a large industrial facility. The facility consistsContinue reading “Voltage Sag Study – Application of a Static Transfer Switch”

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”

Voltage Sags and Their Impact on Industrial Customers

Published by Electrotek Concepts, Inc., PQSoft Case Study: Voltage Sags and Their Impact on Industrial Customers, Document ID: PQS0509, Date: September 30, 2005. Abstract: This case study describes the impact of voltage sags on a utility and one industrial customer. Several utility measures are presented to minimize the customer’s exposure to voltage sags. However, these measuresContinue reading “Voltage Sags and Their Impact on Industrial Customers”

Voltage Sag Study for a Distribution System Customer

Published by Electrotek Concepts, Inc., PQSoft Case Study: Voltage Sag Study for a Distribution System Customer, Document ID: PQS0308, Date: February 4, 2003. Abstract: Voltage variations, such as voltage sags and momentary interruptions are two of the most important power quality concerns for customers. Customers understand that interruptions cannot be completely prevented on the power system.Continue reading “Voltage Sag Study for a Distribution System Customer”