Published by Maciej ANTAL, Wrocław University of Science and Technology, Department of Electrical Machines, Drives and Measurements Abstract. A physical model of a squirrel-cage induction drive, allowing to stimulate coil short circuits in the front part of the motor, was used to investigate the phenomena accompanying short circuits. Assuming that a short circuit occurs duringContinue reading “Inter-Turns Short Circuits in Stator Winding of Squirrel-Cage Induction Motor”
Tag Archives: Short Circuit
6 Techniques for Controlling Harmonic Distortion
Published by Simon Mugo, EE Power – Technical Articles: 6 Techniques for Controlling Harmonic Distortion, May 15, 2023. Harmonics–currents or voltages at a multiple of the power systems’ fundamental frequencies– originate from non-linear loads in power systems. This article will introduce six techniques necessary to reduce harmonic distortion. The earliest method of controlling problems associated withContinue reading “6 Techniques for Controlling Harmonic Distortion”
Simulations of Electrical Parameters in High Current Busbars
Published by Łukasz KOLIMAS, Sebastian ŁAPCZYŃSKI, Michał SZULBORSKI, Warsaw University of Technology, Electrical Power Engineering Institute Abstract. The requirements for high-current circuits, contact systems, switchboards and electrical apparatuses differ from the typical requirements for devices with a low current load, not only because those are more complex, but also because new requirements arise due toContinue reading “Simulations of Electrical Parameters in High Current Busbars”
Tests of Selected Distance Protection Functions of Modern Protective Relay used for HV and EHV Transmission Lines Protection
Published by Marcin JANUSZEWSKI, Ryszard KOWALIK, Karol KUREK, Emil BARTOSIEWICZ, Adam SMOLARCZYK, Désiré D. RASOLOMAMPIONONA, Warsaw University of Technology, Electrical Power Engineering Institute Abstract. This article describes the comparison of test results of distance protection functions (ANSI 21) implemented in protective relays of various manufacturers dedicated to HV and EHV lines protection. A special emphasisContinue reading “Tests of Selected Distance Protection Functions of Modern Protective Relay used for HV and EHV Transmission Lines Protection”
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”
AC Equipment Grounding: How Dangerous are Electric Shocks?
Published by Lorenzo Mari, EE Power – Technical Articles: AC Equipment Grounding: How Dangerous are Electric Shocks?, July 31, 2020. This article looks at the effects of AC electric current on the human body. An electric current passing through the human body can cause death. On many occasions, the cause of death is in the heart,Continue reading “AC Equipment Grounding: How Dangerous are Electric Shocks?”
The Coreless Superconducting Fault Current Limiter 15 kV 140 A
Published by Michał MAJKA, Janusz KOZAK, Electrotechnical Institute Abstract. The superconducting fault current limiter (SFCL) is a device allowing for a more effective use of the existing power network infrastructure. The limitation of short-circuit currents by the SFCL to safe levels will result in the network elements being susceptible to smaller electrodynamic and thermal overloads.Continue reading “The Coreless Superconducting Fault Current Limiter 15 kV 140 A”
Impact of SMES Unit on DC-Link Voltage of DFIG during Various Types and Level of Faults
Published by A. M. Shiddiq YUNUS1, Makmur SAINI1, Ahmed Abu-SIADA2, Mohammad A.S. MASOUM3, State Polytechnic of Ujung Pandang (1), IndonesiaCurtin University (2), AustraliaUtah Valley University(3), USA Abstract. Wind energy becomes a popular source for renewable energy based power plants since a recent decade ago. Within many types of wind turbine generator (WTG), Doubly Fed InductionContinue reading “Impact of SMES Unit on DC-Link Voltage of DFIG during Various Types and Level of Faults”
Impact of Renewables on Relay Protection Operation
Published by Mikhail ANDREEV, Aleksey SUVOROV, Alisher ASKAROV, Anton KIEVETS, Vladimir RUDNIK, Tomsk Polytechnic University, Russia Abstract. The current trend in the development of electric power systems is the integration of renewable energy sources in the form of distributed generation. It was revealed that one of the main reasons inhibiting this process is a changeContinue reading “Impact of Renewables on Relay Protection Operation”
Consumers Protection and Monitoring with Microcontroller Based Device for Low-Voltage Distribution Systems
Published by Petre Lucian OGRUTAN1, Lia Elena ACIU1, Dan LOZNEANU1, Ioan ROSCA2,Transilvania University of Brasov, Romania (1), Transilvania Sud Electricity Distribution (2) Abstract. Protection devices against over-voltage and over-currents for low voltage systems are equipped with varistors and gas-discharge tubes around a fuse, having a disconnection time about 200ms. This paper proposes an intelligent protectionContinue reading “Consumers Protection and Monitoring with Microcontroller Based Device for Low-Voltage Distribution Systems”
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