PQBlog

Wind Plant IEEE Std. 519 Compliance Evaluation

Published by Electrotek Concepts, Inc., PQSoft Case Study: Wind Plant IEEE Std. 519 Compliance Evaluation, Document ID: PQS1201, Date: January 25, 2012. Abstract: This case study presents the results for a wind plant substation IEEE Std. 519 harmonic measurement compliance evaluation. The wind plant substation supplied 65 wind turbine generators and the power quality monitor wasContinue reading “Wind Plant IEEE Std. 519 Compliance Evaluation”

A 3 kV DC Electric Traction System Modernisation for Increased Speed and Trains Power Demand – Problems of Analysis and Synthesis

Published by Adam SZELĄG, Tadeusz MACIOŁEK, Politechnika Warszawska, Instytut Maszyn Elektrycznych Abstract. A 3 kV DC supply system, used on railways in Poland, since 1936, has power delivery capacity that allows reaching by trains a maximum speed of 250 km/h. Currently, the maximum trains service speed on Polish railway is 160 km/h, although speed recordContinue reading “A 3 kV DC Electric Traction System Modernisation for Increased Speed and Trains Power Demand – Problems of Analysis and Synthesis”

Seasonality Effect on Working and Prediction of the Production of Electricity in Onshore Wind Farm

Published by Mateusz DUTKA1, Bogusław ŚWIĄTEK1, AGH University of Science and Technology, Department of Power Electronics and Energy Control Systems (1) Abstract. This paper describes relevant issues of the energy prediction from onshore wind farms. The use of a neural network to forecast wind power production and its resistance to changing seasons is examined. DifferentContinue reading “Seasonality Effect on Working and Prediction of the Production of Electricity in Onshore Wind Farm”

Transformer Derating

Published by Electrotek Concepts, Inc., PQSoft Case Study: Transformer Derating, Document ID: PQS0324, Date: October 10, 2003. Abstract: A principal effect of harmonic distortion is to increase losses and heating in almost every component in the electric power system. While contributing almost no useful work, harmonic components of voltage and current increase the RMS value ofContinue reading “Transformer Derating”

Clean Power for Office Towers

Published by Raghavan Venkatesh, EE Power – Technical Articles: Clean Power for Office Towers, April 12, 2018. This article features EPCOS AG product PQSine S series designed for 3-phase grids with or without neutral conductors and enables harmonics to be filtered. The complex power networks of skyscrapers and other modern buildings must serve a wide rangeContinue reading “Clean Power for Office Towers”

PQ Investigation for SW County School District No. 1 Harmonic Considerations Associated with PC Loads

Published by Electrotek Concepts, Inc., PQSoft Case Study: PQ Investigation for SW County School District No. 1, Document ID: PQS0323, Date: October 10, 2003. Abstract: The County School District has a concern for increasing computer loads at the local High School. There are approximately 300 computers currently in use at the school and plans are toContinue reading “PQ Investigation for SW County School District No. 1 Harmonic Considerations Associated with PC Loads”

Load Flow Analysis in Local Microgrid with Storage

Published by Vishnu SURESH, Dominika KACZOROWSKA, Przemyslaw JANIK, Jacek REZMER, Wroclaw University of Science and Technology Abstract. This paper deals with load flow analysis of local microgrid containing a stochastic renewable energy source and storage. The study is carried out using the Matpower toolbox with all relevant constraints considered regarding storage, power lines and otherContinue reading “Load Flow Analysis in Local Microgrid with Storage”

Electric Utility Harmonic Study Medium Voltage Filter Design

Published by Electrotek Concepts, Inc., PQSoft Case Study: Electric Utility Harmonic Study Medium Voltage Filter Design, Document ID: PQS0407, Date: September 30, 2004. Abstract: This particular utility was experiencing voltage distortion levels throughout their distribution network that were exceeding IEEE Std. 519 limits. One customer, a plastic extrusion plant, was experiencing blown fuses in their switchedContinue reading “Electric Utility Harmonic Study Medium Voltage Filter Design”

Introduction to Off-Grid and Hybrid EV Charging System Architectures

Published by Rakesh Kumar, EE Power – Technical Articles: Introduction to Off-Grid and Hybrid EV Charging System Architectures, December 05, 2022. Off-grid and Hybrid Charging Systems are important components of the electric vehicle ecosystem. Learn more about these architectures in this technical article. Electric Vehicle Charging Stations (EVCS) are the topic of the hour to caterContinue reading “Introduction to Off-Grid and Hybrid EV Charging System Architectures”

Analysis of Transformer Condition by Frequency and Time Methods

Published by Matej KUČERA1, Milan ŠEBOK1, Miroslav GUTTEN1, Daniel KORENČIAK1, Pawel ZUKOWSKI2, Tomasz KOLTUNOWICZ2, University of Zilina, Slovakia (1), Lublin University of Technology, Poland (2) Abstract. Article presents theoretical and experimental analyses of possible mechanical effect of short-circuit currents on the transformer winding by frequency and time methods. The first part of the paper isContinue reading “Analysis of Transformer Condition by Frequency and Time Methods”