Tag Archives: Transients

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”

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”

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”

Transient Issues Related to Power Factor Correction

Published by Electrotek Concepts, Inc., PQSoft Case Study: Transient Issues Related to Power Factor Correction, Document ID: PQS0605, 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 “Transient Issues Related to Power Factor Correction”

Solving and Mitigating Electrical Power Problems

Published by CEA Technologies Inc. (CEATI), POWER QUALITY Energy Efficiency Reference Guide, Chapter 4 – Solving and Mitigating Electrical Power Problems. 4.1 Identifying the Root Cause and Assessing Symptoms Power quality technologists employ technical instrumentation. This instrumentation can range from simple digital multi-metering through to sophisticated waveform analysis instruments. True power quality monitoring requires full-timeContinue reading “Solving and Mitigating Electrical Power Problems”

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”