Published by Electrotek Concepts, Inc., PQSoft Case Study: General Reference – Using Simulations and Measurements in PQ Analysis, Document ID: PQS0309, Date: April 16, 2003. Abstract: Simulations provide a convenient means to characterize power quality problems, predict disturbance characteristics, and evaluate possible solutions to problems. They should be performed in conjunction with monitoring efforts and measurementsContinue reading “General Reference – Using Simulations and Measurements in PQ Analysis”
Yearly Archives: 2022
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”
Program on Technology Innovation: A History of Power Quality
Addressing Evolving Customer Technologies and an Increasingly Complex Power Grid Published by Electric Power Research Institute (EPRI), Inc. Document ID: 3002022396, March 2022. Introduction Over the past 50 years, the concept of power quality (PQ) has evolved from being an unknown and undefined concept to being understood as a fundamental component of grid performance, utilityContinue reading “Program on Technology Innovation: A History of Power Quality”
General Reference – Approach to Systems Monitoring
Published by Electrotek Concepts, Inc., PQSoft Case Study: General Reference – Approach to Systems Monitoring, Document ID: PQS0310, Date: April 16, 2003. Abstract: Power quality monitoring is an essential service many utilities perform for their industrial and other key commercial customers. Because of the technology and software now available, this monitoring is highly effective. Not onlyContinue reading “General Reference – Approach to Systems Monitoring”
Monitoring Objectives and Screening Procedures – Distribution Feeder Capacitor Bank Application
Published by Electrotek Concepts, Inc., PQSoft Case Study: Monitoring Objectives and Screening Procedures – Distribution Feeder Capacitor Bank Application, Document ID: PQS0708, Date: January 1, 2007. Abstract: Power quality problems encompass a wide range of disturbances and conditions on utility and customer power systems. They include everything from very fast transient overvoltages to long duration outages.Continue reading “Monitoring Objectives and Screening Procedures – Distribution Feeder Capacitor Bank Application”
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”
Modeling Ferroresonance in an Underground Distribution System
Published by Electrotek Concepts, Inc., PQSoft Case Study: Modeling Ferroresonance in an Underground Distribution System, Document ID: PQS0610, Date: July 1, 2006. Abstract: The objective of this case study is to provide an overview of ferroresonance phenomena, its modeling aspects, and practical experience in recognizing, avoiding, and solving the problem. In particular, it will present symptomsContinue reading “Modeling Ferroresonance in an Underground Distribution System”
General Reference – Ferroresonance
Published by Electrotek Concepts, Inc., PQSoft Case Study: General Reference – Ferroresonance, Document ID: PQS0607, Date: July 1, 2006. 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 is placed inContinue reading “General Reference – Ferroresonance”
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”
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