Published by A. El Mofty K. Youssef, Alexandria Electricity Company , Alexandria – Egypt SUMMARY Power quality has become an increasing concern to Alexandria Electricity Company (AEC) for the last few years. Problems involving the quality of voltage to the customers are always an important point. The increased concern of power quality has resulted inContinue reading “Industrial Power Quality Problems”
Category Archives: Case Studies
Municipal Elevator Study – Improving Elevator Performance
Published by Electrotek Concepts, Inc., PQSoft Case Study: Municipal Elevator Study – Improving Elevator Performance, Document ID: PQS0507, Date: September 30, 2005. Abstract: In the past, system-wide voltage reductions and other voltage anomalies have caused unreliable elevator operation for some Municipal Utility customers. Municipal Utility’s Customer Service Department received many complaints from customers with elevators despiteContinue reading “Municipal Elevator Study – Improving Elevator Performance”
MG Set Provides Voltage Sag Support Voltage Sag Ride-Through
Published by Electrotek Concepts, Inc., PQSoft Case Study: MG Set Provides Voltage Sag Support Voltage Sag Ride-Through, Document ID: PQS0412, Date: December 31, 2004. Abstract: Today’s high-tech computer and multi-media equipment require “clean” electric power protected against normal split-second voltage variations. A technology that has recently received much attention for providing this ride-through is the written-poleContinue reading “MG Set Provides Voltage Sag Support Voltage Sag Ride-Through”
Improving Equipment Ride Through Voltage Sag Evaluation
Published by Electrotek Concepts, Inc., PQSoft Case Study: Improving Equipment Ride Through Voltage Sag Evaluation, Document ID: PQS0405, Date: June 30, 2004. 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. However,Continue reading “Improving Equipment Ride Through Voltage Sag Evaluation”
Analysis of Power Quality Factors: A Case Study of Windhoek, Namibia
Published by Aldrin Mubiana, Michael Mutingi, Member, IAENG, Gideon Gope, Charles Mbohwa. Conference: Proceedings of the World Congress on Engineering and Computer Science 2016 Vol II WCECS 2016, October 19-21, 2016, San Francisco, USA. Abstract—Power quality (PQ) is concerned with control of harmonic distortions, voltage variations, voltage reductions, power interruptions and voltage surges. Enterprises devicesContinue reading “Analysis of Power Quality Factors: A Case Study of Windhoek, Namibia”
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”
EMC for 2 to 150 kHz: A Proposal for Emission and Immunity of Equipment including Power-Line Communication
Published by Anders Larsson and Math Bollen, ELFORSK, Elforsk rapport 09:29, October 2008 Summary The frequency range from 2 to 150 kHz is not sufficiently covered in international standards. The contrast with the frequency range below 2 kHz is striking. There have traditionally been good reasons to emphasize on the lower frequency range, where theContinue reading “EMC for 2 to 150 kHz: A Proposal for Emission and Immunity of Equipment including Power-Line Communication”
Harmonic Issues Related to Power Factor Correction
Published by Electrotek Concepts, Inc., PQSoft Case Study: Harmonic Issues Related to Power Factor Correction, Document ID: PQS0604, Date: April 1, 2006. Abstract: Power factor correction is an important facet of power quality. Capacitors may be installed on customer systems to minimize charges for poor power factor on their electric bill. These installations may create problemsContinue reading “Harmonic Issues Related to Power Factor Correction”
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