Distribution Substation Voltage Variation Measurement Data Evaluation

Published by Electrotek Concepts, Inc., PQSoft Case Study: Distribution Substation Voltage Variation Measurement Data Evaluation, Document ID: PQS1007, Date: October 15, 2009. Abstract: This case study presents a voltage variation data analysis for a 12.47 kV substation monitoring location for a three-month period. The analysis included trends of the rms voltage and unbalance and statistical analysisContinue reading “Distribution Substation Voltage Variation Measurement Data Evaluation”

Distribution Feeder Voltage Sag Evaluation

Published by Electrotek Concepts, Inc., PQSoft Case Study: Distribution Feeder Voltage Sag Evaluation, Document ID: PQS0905, Date: October 15, 2009. Abstract: This case study shows the results for simulations completed to evaluate the impact of a distribution feeder fault on the operation of a customer adjustable-speed drive during the resulting voltage sag and momentary interruption. TheContinue reading “Distribution Feeder Voltage Sag Evaluation”

Customer Induction Motor Starting Evaluation

Published by Electrotek Concepts, Inc., PQSoft Case Study: Customer Induction Motor Starting Evaluation, Document ID: PQS0904, Date: October 15, 2009. Abstract: This case study shows the results for simulations completed to determine the severity of an undervoltage condition during starting of a customer induction motor starting. The simulations for the case were completed using the PSCADContinue reading “Customer Induction Motor Starting Evaluation”

Flywheel Size Design Considerations and Experimental Verification Using a 50-kW System for Voltage Sag Compensator with Flywheel Induction Motor

Published by Shuhei Kato, Miao-miao Cheng, Hideo Sumitani and Ryuichi Shimada,Integrated Research Institute, Tokyo Institute of Technology, Japan SUMMARY Flywheel energy storage systems can be used as an uninterrupted power supply system because they are environmentally friendly and have high durability. The use of a simple voltage sag compensator with a low-speed heavy flywheel andContinue reading “Flywheel Size Design Considerations and Experimental Verification Using a 50-kW System for Voltage Sag Compensator with Flywheel Induction Motor”

Power Quality Problems

Published by CEA Technologies Inc. (CEATI), POWER QUALITY Energy Efficiency Reference Guide, Chapter 3 – Power Quality Problems. 3.1 How Power Quality Problems Develop Three elements are needed to produce a problematic power line disturbance: A source A coupling channel A receptor If a receptor that is adversely affected by a power line deviation isContinue reading “Power Quality Problems”

General Reference Common Power Quality Problems and Solutions

Published by Electrotek Concepts, Inc., PQSoft Case Study: General Reference Common Power Quality Problems and Solutions, Document ID: PQS0315, Date: July 18, 2003. Abstract: Power quality is a frequently used term that means different things to different people. Common power quality problems include all of the issues that arise from the incompatibility between a utility’s powerContinue reading “General Reference Common Power Quality Problems and Solutions”

Wind Energy Conversion System from Electrical Perspective — A Survey

Published by Hyong Sik Kim, Dylan Dah-Chuan Lu, School of Electrical and Information Engineering, University of Sydney, Sydney, Australia. Email: hkim4210@uni.sydney.edu.au Smart Grid and Renewable Energy, 2010, 1, 119-131 doi:10.4236/sgre.2010.13017 Published Online November 2010 (http://www.SciRP.org/journal/sgre). Received October 20th, 2010; revised November 14th, 2010; accepted November 20th, 2010. ABSTRACT This paper focuses on the wind energyContinue reading “Wind Energy Conversion System from Electrical Perspective — A Survey”

Sags and Swells

Published by Richard P. Bingham, Manager of Technology and Products, Dranetz – BMI, 1000 New Durham Road, Edison, NJ 08818-4019, Phone 732-248-4393, Fax 732-287-8320. February 16, 1998 ABSTRACT Sags and swells are the most common types of power quality disturbances. Millions of dollars are lost in productivity each year in the United States due toContinue reading “Sags and Swells”

Some Comments on Power Acceptability Curves

Published by G. Heydt , Arizona State University Tempe, Arizona USA R. Thallam, Salt River Project Phoenix, Arizona USA M. Albu, Universitatea Politehnica Bucureşti Bucharest, Romania CARIBBEAN COLLOQUIUM ON POWER QUALITY (CCPQ), JUNE 2003 Abstract Power acceptability curves, also known as voltage vulnerability or sensitivity curves, have been used for over 30 years to characterizeContinue reading “Some Comments on Power Acceptability Curves”