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”
Category Archives: Case Studies
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”
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”
Charging Infrastructure and Testing of the Electric Vehicle Energy Battery Decline
Published by Anna ZIELIŃSKA, AGH University of Science and Technology Abstract: The article presents the infrastructure for charging electric vehicles, their development and the types and methods of charging. The paper presents the results of testing the level of vehicle charge depending on the route traveled and its dynamics. The test results show the changeContinue reading “Charging Infrastructure and Testing of the Electric Vehicle Energy Battery Decline”
Solar Power Plant with Distributed System of PV Panels
Published by Mariusz ŚWIDERSKI, Michał GWÓŹDŹ, Poznan University of Technolog Abstract. In the work the other approach to a photovoltaic system is presented. With regard to an improvement of reliability of a solar system, maintaining and improving system’s efficiency, authors proposed conception of the distributed PV system. This system consists of a set of individualContinue reading “Solar Power Plant with Distributed System of PV Panels”
Prediction of Electricity Production in Island Operation under the different Wind Generation Modes
Published by Dušan MEDVEĎ1, Zsolt ČONKA1 Marek PAVLIK1, Ján ZBOJOVSKY1,Michal KOLCUN1,Michal IVANČÁK1, Technical University of Košice, Department of Electric Power Engineering, Mäsiarska 74, 04001 Košice, Slovakia (1) Abstract. This paper deals with the prediction of electricity generation in particular part of the network (island operation) where were considered various regimes of the wind power plantContinue reading “Prediction of Electricity Production in Island Operation under the different Wind Generation Modes”
Overvoltage Induced in Overhead Power Lines by nearby Lightning Stroke
Published by Grzegorz MASŁOWSKI, Robert ZIEMBA, Tomasz KOSSOWSKI,Rzeszow University of Technology Abstract. The results of simulations of overvoltages induced in the overhead transmission line, caused by nearby lightning stroke are presented. Calculations were made using the LIOV module implemented in the EMTP-RV program. The influence of the distance of the lightning channel from the lineContinue reading “Overvoltage Induced in Overhead Power Lines by nearby Lightning Stroke”
Noise and Vibration Analysis of a Distribution Transformer
Published by Dániel MARCSA, eCon Engineering Kft., Hungary Abstract. Transformer noise is a significant contribution to unwanted ambient noise, especially in the vicinity of the electrical transmission facility. It is therefore very important to get to know the mechanism of noise generation of the distribution transformer. As outcomes of this work, a finite element basedContinue reading “Noise and Vibration Analysis of a Distribution Transformer”
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