Published by Alex Roderick, EE Power – Technical Articles: Harmonic Mitigation Using Phase-shifting Transformers and Harmonic Filters, May 21, 2021. Learn about how minimise the presence of harmonics in an electrical system with harmonic transformers and filters. Three-phase loads do not generate triplen harmonics. Therefore, harmonic problems in situations where 3-phase loads dominate are primarily fromContinue reading “Harmonic Mitigation Using Phase-shifting Transformers and Harmonic Filters”
Author Archives: PQBlog
Critical Electrical Loads – How to Supply and the Use of UPS Units
Published by Prof. Silviu Darie, PhD (EE), Technical University Cluj Napoca, Romania, Honorary Member of the Romanian Technical Sciences Academy. Email: silviu.darie@enm.utcluj.ro. Abstract: Based on the author’s experience in designing power systems for critical loads, the paper presents the ways of supplying essential loads, the distribution system layout configuration, the uninterruptible power supply sources (UPS), theContinue reading “Critical Electrical Loads – How to Supply and the Use of UPS Units”
Developing Infrastructure to Charge Electric Vehicles
Published by U.S. Department of Energy – Energy Efficiency and Renewable Energy Alternative Fuels Data Center Consumers and fleets considering electric vehicles (EVs)—which include all-electric vehicles and plug-in hybrid electric vehicles (PHEVs)—need access to charging stations. For most drivers, this starts with charging at home or at fleet facilities. Charging stations at workplaces and public destinations may help bolster market acceptanceContinue reading “Developing Infrastructure to Charge Electric Vehicles”
Earth Fault Protection Supported with Adaptive Admittance Criteria
Published by Józef LORENC, Krzysztof ŁOWCZOWSKI, Bogdan STASZAKPolitechnika Poznańska, Instytut Elektroenergetyki Abstract. In this paper possibilities for improvement of earth fault protection by adjustment of protective relay settings due to change of neutral point impedance in medium voltage networks are presented. Streszczenie. W artykule przedstawiono zagadnienia dotyczące możliwości poprawy skuteczności działania zabezpieczeń ziemnozwarciowych typu YY0Continue reading “Earth Fault Protection Supported with Adaptive Admittance Criteria”
Insulation Failure Detection in EV Batteries
Published by Ryan Hsu, Bright Toward Industrial Co., Ltd., EE Power – Industry Article: Insulation Failure Detection in EV Batteries, May 15, 2023. One of the issues with electric vehicle batteries is insulation failure. A proven approach to detecting and correcting this failure lies in ground-fault detection. However, as higher voltages become increasingly common in electricContinue reading “Insulation Failure Detection in EV Batteries”
Wind Farm and System Modelling Evaluation in Harmonic Propagation Studies
Published by G. A. Mendonça1, H. A. Pereira1,2 and S. R. Silva1,1 Graduate Program in Electrical Engineering – Universidade Federal de Minas Gerais Av. Antônio Carlos 6627, 31270-901, Belo Horizonte, MG, Brazil. Phone: +55-31-3409-4842, e-mail: gforti@gmail.com, heverton.pereira@ufv.com.br, selenios@dee.ufmg.br2 Department of Electrical Engineering, Universidade Federal de Viçosa Av. P.H.Rolfs S/N,36570-000, Viçosa, MG, Brazil Abstract. Wind powerContinue reading “Wind Farm and System Modelling Evaluation in Harmonic Propagation Studies”
Analysis of the Impact of Secondary Winding Impedance on the Parameters of Transformer Type Superconducting Current Limiters
Published by Joanna KOZIEŁ, Lublin University of Technology, Institute of Electrical Engineering and Electrotechnologies Abstract. The paper presents the classification of superconducting fault current limiters. In particular the principle of construction and operations of superconducting current limiter of transformer type is presented. Functional physical model of such a limiter, designed, manufactured in the Laboratory ofContinue reading “Analysis of the Impact of Secondary Winding Impedance on the Parameters of Transformer Type Superconducting Current Limiters”
Making Sense of Electric Vehicle Charging Options
Published by Mike Falter, EE Power – Market Insights: Making Sense of Electric Vehicle Charging Options, September 07, 2022. When it comes to charging your electric vehicle there are several options to consider based on speed, convenience and cost. In the recent article on the Wallbox acquisition of COIL, EE Power briefly reviewed the Wallbox portfolio of EV chargingContinue reading “Making Sense of Electric Vehicle Charging Options”
Computer Assisted Harmonics Analysis
Published by Prof. Silviu Darie, PhD (EE), Technical University Cluj Napoca, Romania, Honorary Member of the Romanian Technical Sciences Academy. Email: silviu.darie@enm.utcluj.ro. Abstract: Based on the author’s experience one describes in field tested methodologies which can be employed in solving the frequency-based power quality problems. A generic approach is presented and an experience-based assessment isContinue reading “Computer Assisted Harmonics Analysis”
Single Line to Ground-Fault Detection for Unit Generator-Transformer based on Wavelet Transform and Neutral Networks
Published by Ahmad Rizal SULTAN1, Mohd Wazir bin MUSTAFA2, Makmur SAINI3, Ahmad GAFFAR41,3,4 Politeknik Negeri Ujung Pandang, South Sulawesi-Indonesia2Universiti Teknologi Malaysia, Faculty of Electrical Engineering, Johor-Malaysia Abstract. The aim of this paper is to detect the single line to ground fault on the unit generator- transformer. A new ground fault detection scheme based on theContinue reading “Single Line to Ground-Fault Detection for Unit Generator-Transformer based on Wavelet Transform and Neutral Networks”
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